Professor Karim's CV

Curriculum Vitae

Karim S. Karim

Professor, Department of Electrical and Computer Engineering

University of Waterloo, Canada

December 2015

1. Background

1.1 Personal Details

Name:           Karim S. Karim

Email:            kkarim@uwaterloo.ca

Web:             silicon-thin-film-applied-research

Citizenship:  Canada

1.2 Education

Aug 2009 - May 2012       Masters of Business Administration at the Rotman School of Management, University of Toronto, Canada

  • Major in Health Sector Management
  • Dean’s List and Bregman Scholar (Top five students of graduating class)
  • Recipient of the $100,000 CAD Canadian Institutes of Health Research (CIHR) Science to Business Fellowship

July 2004                           Professional Engineer (P.Eng.), British Columbia, Canada

May 1999 - Dec 2002       PhD, Electrical Engineering, University of Waterloo, Canada

  • Thesis title: “Pixel Architectures for Large Area Digital Imaging”
  • Canadian Natural Sciences and Engineering Council of Canada (NSERC) Doctoral Prize ($10,000 CAD)
  • CAGS-UMI Outstanding Dissertation in Medical Sciences, Science and Engineering ($1,500 CAD)
  • Colton Medal for innovative microelectronics research ($3,000 CAD)

Sep 1994 - Apr 1999         BASc (Honors), Computer Engineering, University of Waterloo, Canada

  • First class honors
  • Sanford Fleming Foundation Department level Technical Speaking Award

1.3 Employment History at Academic Institutions

Mar 2013 – present               Full Professor (tenured), Electrical and Computer Engineering Dept, University of Waterloo

July 2009 – Feb 2013            Associate Professor (tenured), Electrical and Computer Engineering Dept, University of Waterloo

July 2007 – June 2009           Assistant Professor, Electrical and Computer Engineering Dept, University of Waterloo

July 2007 – June 2012           Adjunct Associate Professor, School of Engineering Science, Simon Fraser University

Feb 2003 - June 2007             Assistant Professor, School of Engineering Science, Simon Fraser University

Jan 2001 - April 2001            Lecturer (sessional), Electrical and Computer Engineering, University of Waterloo

May 1999 - Dec 2002            Research Associate, Electrical and Computer Engineering, University of Waterloo

Sep 1998 - Dec 1998              Research Assistant, Electrical and Computer Engineering, University of Waterloo

1.4 Academic Leadership Roles

Sep 2011 – present                Associate Director, Center for Bioengineering and Biotechnology, University of Waterloo (https://uwaterloo.ca/bioengineering-biotechnology/)

July 2015 – present               Electrical and Computer Engineering Chair Selection Committee, University of Waterloo (elected)

May 2015 – present              Faculty-at-large representative, University of Waterloo Senate (elected)

May 2015 – present              Member of the University of Waterloo Board of Governors (elected)

May 2015 – present              Faculty-at-large representative, University of Waterloo Senate Executive Committee (elected)

Jan 2015 – present                 Editor for Central USA and Canada, IEEE Electron Devices Society Quarterly Newsletter

July 2014 – present               Member of Department Tenure and Promotion Committee (DTPC), Electrical and Computer Engineering Department, University of Waterloo (elected)

Aug 2012 – Mar 2013            Head, Academic Planning Department, University of Central Asia, Bishkek, Kyrgyzstan

Jan 2012 – present                 Chair, North America Subcommittee on Regions and Chapters, Regions 1-3 and 7, IEEE Electron Devices Society

Feb 2010 – present                Member of Program Committee, Physics of Medical Imaging conference, SPIE International Medical Imaging Symposium

June 2005 – May 2006          Member of the VP Academic Search Committee, Simon Fraser University (appointed)

June 2005 – June 2006           Chair, Engineering Physics Option, School of Engineering Science, Simon Fraser University

July 2003 – June 2006           Member of Department Tenure Committee (DTC), School of Engineering Science, Simon Fraser University

1.5 Employment History in Industry

January 2015 – present          Founder and CTO, KA Imaging, Waterloo, Canada
 

  • Development of digital X-ray imagers for medical and bioengineering applications
  • http://www.kaimaging.com

Dec 2008 – Dec 2012             Imaging Technology Consultant, UltraScan Inc, Amherst, NY, USA
 

  • Development of large area acoustic digital imagers for biometric imaging applications

Sep 2006 – June 2007             Founder and CTO, ActivPixel Inc., Vancouver, Canada
 

  • Development of large area direct conversion digital X-ray imagers

Jan 2001 - Dec 2002               Integrated Circuit Designer (Part-time), Ignis Innovation Inc, Waterloo, Canada


  • Development of Organic Light Emitting Diode (OLED) display readout backplane

Jan 1998 - April 1998             Digital Integrated Circuit Designer, Integrated Device Tech (IDT), Atlanta, GA, USA


  • Simulation and layout of first industry standard 1Mbit DRAM FIFO specialty memory

May 1997 - Aug 1997            Hardware Engineering, Computing Devices Canada (General Dynamics), Ottawa, Canada


  • Design, simulation and layout of multilayer, mixed signal printed circuit board for multimedia applications

Sept 1996 - Dec 1996             Software Engineering, Computing Devices Canada (General Dynamics), Ottawa, Canada

  • 
Development of firmware for single board VMEbus/PCIbus computer for use in military applications

Jan 1996 - April 1996             Real time software developer, Teleride Sage Limited, Toronto, Canada


  • Automatic vehicle location GPS software for the Portland (Oregon) transit system.

May 1995 - Aug 1995            Real-time software developer, Teleride Sage Limited, Toronto, Canada

  • 
Automatic vehicle location GPS software for the Portland (Oregon) transit system.

2. Research

2.1 Awards, Honours, and Scholarships

  1. Teledyne DALSA Componentware/CAD award (2014): One award is given annually for demonstrating the novel use of microelectronics components and the development of novel applications relevant to industry. I along with my graduate students, Alireza Parsafar, Abdallah El-Falou and Chris Scott received this for our work on ultra-high resolution CMOS digital X-ray imagers. Value: $3000 CAD
  2. Rotman Citizenship Award (2012): 12 in total annually. These awards recognize individuals for contributions to co-curricular excellence, leadership, peer support, increasing school spirit, and those who have had a significant positive impact on the overall experience at the Rotman School.
  3. Grand Challenges Canada Rising Stars in Global Health Award (2012): 15 awards in total. I proposed a distributed global health solution for tuberculosis screening by developing radically low cost digital X-ray systems to spur an increase in the number of tuberculosis screening clinics worldwide. Value: $113,000 CAD
  4. SPIE Int. Med. Imag. Conf. Honorable Mention Poster Award (2012): My graduate student, Yuan Fang, received the award for a paper we co-authored; Six awarded (2000 attendees; 150 posters in competition)
  5. SPIE Int. Med. Imag. Conf. Honorable Mention Poster Award (2012): My postdoctoral fellow, Dr. Hasib Majid, received the award for a paper we co-authored; Six awarded (2000 attendees; 150 posters in competition)
  6. Nominated and selected for the IEEE Electron Device Society Distinguished Lecturer Program (Feb 2011 - present): IEEE pays for Distinguished Lecturers to visit IEEE chapters around the world and give technical seminars in their fields of expertise.  There are only three IEEE distinguished lecturers for the Electron Devices Society in all of Canada.
  7. Thunder Bay Regional Research Institute Best Presentation Award (2010): My student, Mohammad Yazdandoost, received the award for a talk we co-authored; One awarded (100 attendees, 10 talks in competition).  Value: $500 CAD
  8. University of Waterloo Faculty of Engineering Outstanding Research Award (2009): Awarded to one assistant, associate and full professor in Faculty of Engineering annually; value: $2,500 CAD
  9. CIHR Science to Business (S2B) Award (2009):  Awarded to doctoral degree holders in the life sciences and health related research fields to pursue an MBA with a focus on the health sector; value: $100,000 CAD
  10. SPIE Int. Med. Imag. Conf. Honorable Mention Poster Award (2009): My students, Amir Goldan and Bahman Hadji, received the award for a paper we co-authored; Five awarded (3000 attendees; 150 posters in competition)
  11. Ministry of Research and Innovation Early Research Award (2009): $150,000 for research over five years.
  12. IEEE Canadian Conference on Electrical and Computer Engineering Best Student Paper Award (2008): My student, Afrin Sultana, received the award for a paper we co-authored in the Circuits, Devices and Systems Session; One awarded (123 papers in competition)
  13. Imagine Imaging Best Poster Award (2008): My student, Amir Goldan, received the award for a poster we co-authored; Two awarded (120 attendees, 10 posters in competition).  Value: $100 CAD
  14. SPIE Int. Med. Imag. Conf. Honorable Mention Poster Award (2008): My student, Farhad Taghibakhsh, received the award for a paper we co-authored; Four awarded (4000 attendees; 115 posters in competition)
  15. Canadian Workshop on Microelectromechanical Systems (2007) Best Paper Award: A student I co-supervise with M. Parameswaran at SFU, See-Ho Tsang, received the award for paper we co-authored; One annually; value: $2500
  16. SPIE Int. Med. Imag. Conf. Honorable Mention Poster Award (2007): My student, Farhad Taghibakhsh, received the award for a paper we co-authored; Six awarded (3500 attendees; 137 posters in competition)
  17. Strategic Microelectronics Council Industrial Collaboration Award (2006): My student, Amir Goldan, received this award for a presentation we co-authored; One awarded; value: $3000
  18. CMBES Best Paper Award (2006): My student, Hadi Izadi received the award for a paper we co-authored at the CMBES 2006 conference; Three awarded (120 papers in competition)
  19. SPIE Int. Med. Imag. Conf. Honorable Mention Poster Award (2006): My student, Amir Goldan, received the award for a paper we co-authored; Five awarded (3000 attendees; 113 posters in competition)
  20. SPIE Int. Med. Imag. Conf Best Poster Award (2004): One awarded (2500 attendees; 60 posters)
  21. CAGS/UMI Distinguished Dissertation Award (2004): One awarded annually in Canada to doctoral graduates in engineering, medical sciences and the natural sciences; value: $2,500
  22. NSERC Doctoral Prize (2004): Four awarded annually in Canada to doctoral graduates in natural sciences, engineering and computer sciences; value: $10,000, silver medal
  23. The Institution Premium (2004): One awarded internationally to article selected from journals published by the Institute of Electrical Engineers; value: £2500 shared
  24. Douglas Colton Medal (2003): One awarded annually in Canada to a recent doctoral graduate for contributions to microelectronics, value: $3,500, bronze medal
  25. NSERC PGS M and PGS D (2000,2002):  Graduate scholarship awarded to 1-2% of graduate students in Canada.
  26. Jim and Diane Ohi Memorial Award (2001): One awarded annually in Electrical Engineering at Waterloo for outstanding leadership, value: $200
  27. CITO Best Poster Award (2001): One awarded (500 attendees; 100 posters), value: $500
  28. SPIE Int. Med. Imag. Conf. Best Paper Award (2001): One awarded (4000 attendees; 500 papers in competition), value: $1,500 USD

2.2 Intellectual Property

  1. K.S. Karim, S. Ghanbarzadeh, “Apparatus for radiation detection in a radiography imaging system,” US Provisional Patent No. 62/192,110, filed July 14, 2015.
  2. K.S. Karim, “Photoconductive element for radiation detection in a radiography imaging system,” US Patent App. No. 14/208,702, filed March 13, 2014.
  3. K.S. Karim, “Apparatus for radiation detection in a radiography imaging system,” US Patent App. No. 14/245,200, filed April 4, 2014.
  4. K.S. Karim, N. Allec, “Multilayer flat panel x-ray detector,” US Patent App 20120106698, filed May 2012.
  5. K.S. Karim, K. Wang, “Radiation Detector with Integrated Readout,” US Patent Application 2012/0080607, filed April 2012.
  6. K.S. Karim, S. Abbaszadeh, “Radiation Detector System and Method of Manufacture,” US Patent No. 14/363,859, Issued December 2015.
  7. K.S. Karim, K. Wang, A. Goldan, “Method and Apparatus for a Lateral Radiation Detector,” US Patent 13/265,907, Issued July 2014.
  8. K.S. Karim, F. Taghibakhsh, “Device and Pixel Architecture for High Resolution Digital Imaging,” US Patent 8,199,236, Issued June 2012.
  9. K.S. Karim, A. Goldan, “Method and Apparatus for Single-Polarity Charge Sensing for Semiconductor Radiation Detectors Deposited by Physical Vapor Deposition Techniques,” US Patent 8,129,688, Issued December 2011.
  10. K.S. Karim, M.H. Izadi, F. Taghibakhsh, “High gain digital imaging apparatus and system,” US Patent 7,995,113, Issued August 2011.
  11. K.S. Karim, “Multi-mode digital imaging apparatus and system,” US Patent 7,791,032, Issued September 2010.
  12. K.S. Karim, “Multi-mode digital imaging apparatus and system,” Chinese Patent, Issued September 2010.
  13. A. Nathan, K.S. Karim, N. Mohan, A. Kumar, K. Sakariya, “Integrated multiplexer/de-multiplexer for active-matrix display/imaging arrays,” US Patent 7,573,452, Issued August 2009, USA.
  14. A. Nathan, P. Servati, K.S. Karim, “Organic Light Emitting Diode Display having Shield Electrodes,” US Patent 7,248,236, Issued July 2007, USA.

2.3 Keynotes, Panels, and Invited Talks

Keynote

  1. December 2015                 BOE Industries Annual Innovation Conference (Beijing, China) – “Next generation diagnostic X-ray imagers for scalable and sustainable healthcare”

Panelist

  1. July 2015                          Panelist at 5th Advanced TB Diagnostics Research Course (Montreal, QC) – “Can we exploit digital chest X-ray to improve case finding?”
  2. July 2012                          Panelist for Global Grass-root voices – health sector entrepreneurs session, “TBView 1000: Low cost digital X-ray for tuberculosis screening” TB Forum Arabia
  3. January 2007                    Philosopher’s Café, Simon Fraser University, Breast Imaging Panel Session

Invited Talks (as an IEEE Distinguished Lecturer)

  1. October 2015                    University of Sao Paulo (Sao Paulo, Brazil) – “Ultra-high resolution amorphous selenium-CMOS hybrid X-ray imagers for bioengineering applications”
  2. July 2015                          Concordia University (Montreal, QC) – “Ultra-high resolution amorphous selenium-CMOS hybrid X-ray imagers for bioengineering applications”
  3. February 2015                  University of Central Florida (Orlando, FL) – “Bending the cost curve: Towards a $1000 digital X-ray imager for scalable and sustainable healthcare”
  4. November 22, 2012          TOBB Economic and Technical University (Ankara, Turkey) – “Photon Counting with Amorphous Photoconductors”
  5. August 16, 2011               Simon Fraser University (Vancouver, BC) – “Lateral photodetectors based on amorphous selenium photoconductor”
  6. April 29, 2011                  Concordia University (Montreal, QC) – “Photon Counting Using Amorphous Photoconductors”
  7. August 2010                     Simon Fraser University, (Vancouver, BC) – “Photon counting using amorphous photoconductors”

Invited Talks

  1. February 2016                  Oral presentation (African Academy of Sciences and the Bill and Melinda Gates Foundation), Nairobi, Kenya – “Bending the cost curve: Towards a $1000 digital X-ray imager for scalable and sustainable healthcare”
  2. November 2015                Oral presentation (Biomedical Engineering Department Seminar Series) at University of Buffalo (USA) – “Ultra-high resolution hybrid CMOS X-ray Imager for bioengineering applications”
  3. October 2015                    Oral presentation at Canada-Brazil NanoWeek (Sao Paulo, Brazil) – “Bending the cost curve: Towards a $1000 digital X-ray imager for scalable and sustainable healthcare”
  4. July 2015                          Oral presentation at 5th Advanced TB Diagnostics Research Course (Montreal, QC) – “Dual-energy digital X-ray for global health applications”
  5. December 2014                 Oral presentation to Varian (Palo Alto, CA) – “High dynamic range real-time digital X-ray imager”
  6. November 2014                Oral presentation to the Ontario Brain Institute –  “High resolution digital X-ray for phase contrast imaging applications of the brain”
  7. September 2014                Oral presentation to ON Semiconductor (Aptina LLC) – “Moonbow: low light level video and still camera technology”
  8. September 2014                Oral presentation at the National Biotechnology Week conference, Canada – “Bending the cost curve: Towards a $1000 digital X-ray imager for scalable and sustainable healthcare”
  9. September 2014                Oral presentation for Engineering Integrative Learning university seminar, University of Waterloo, Canada – “Ethics 2.0: An introspective approach to understanding and taking ownership of your actions”
  10. June 2014                          Oral presentation to Samsung Semiconductor – “Moonbow: low light level video and still camera technology”
  11. June 2014                          Poster presentation at Tech Connect National Innovation Showcase, National Harbor MD, USA – “Low cost digital X-ray detector”
  12. May 2014                         Oral presentation at the Symposium on Critical Materials and Resource Management, Canada – “Substituting expensive and toxic materials in X-ray imaging”
  13. October 2013                    Oral presentation at the Sino-US Joint Conference on Chemical Engineering, Beijing, China – “Bending the cost curve: leveraging aging TFT manufacturing facilities to achieve a $1000 digital X-ray imager”
  14. September 2013                Oral presentation at the International Meeting of Microbiologists (ICAAC), Denver, USA – “Low cost digital X-ray for underserved regions of the world”
  15. August 2013                     Oral presentation to GE Healthcare – “Technology updates in digital X-ray imaging”
  16. August 2013                     Oral presentation at the International Conference of Medical Physicists (ICMP), Brighton, UK – “Region of interest tuberculosis imaging”
  17. August 2013                     Oral presentation at the International Conference of Medical Physicists (ICMP), Brighton, UK – “Low cost digital detector technology for emerging economies”
  18. August 2013                     Oral presentation at the Canadian Semiconductor Science and Technology Conference, Thunder Bay, Canada – “K edge imaging using dual layer and single layer large area flat panel imagers”
  19. May 15, 2013                   Oral presentation at the 223rd ECS Meeting, Toronto, Canada – “Indirect Conversion Digital X-ray Imager using an Amorphous Selenium Photoconductor””
  20. December 10, 2012           Poster presentation at the Grand Challenges Meeting (Bill and Melinda Gates Foundation), Ottawa, Canada – “TB View 1000: Low cost digital X-ray for emerging economies”
  21. November 14, 2012          Oral Invited Talk on “Active Pixel Sensors for Large Area Digital Imaging Applications: High SNR, Fast Frame Rates and Low Cost,” at Kyrgyz Russian Slavonic University, Bishkek, Kyrgyz Republic
  22. November 4th, 2011          Oral talk at Institute for Nano-structured Systems (INS), University of Buffalo, Buffalo, USA on “Large area radiation detectors for digital imaging applications”
  23. August 17th, 2011                         15th Canadian Semiconductor Science and Technology Conference (CSSTC), Vancouver, BC – One hour invited talk on “X-ray photon counting using amorphous photoconductors”
  24. August 15th, 2011                         TRIUMF Synchrotron Facility, University of British Columbia, Vancouver, BC – invited seminar on “Large area radiation detectors for digital imaging applications”
  25. July 25th, 2011                  Argonne National Labs Advanced Photon Source, Chicago, IL, USA – invited seminar on “High resolution large area hard X-ray detectors”
  26. June 8th, 2011                    Invited Podcast “Health Seen More Clearly” – Virtual Researcher On-Call, Ontario, Canada http://www.vroc.ca/index.php/component/content/article/3-newsflash/478-twee-episode-18-health-seen-more-clearly.html
  27. May 27th, 2011                 Waterloo Institute for Nanotechnology (WIN) Annual Board of Directors Meeting, Waterloo, ON – One hour invited talk on “X-ray photon counting using amorphous photoconductors”
  28. March 18th, 2011             Waterloo Institute for Nanotechnology (WIN) – Taiwan Workshop, Waterloo, ON – One hour lecture on “Photon Counting Using Amorphous Photoconductors”
  29. November 30th, 2010        Argonne National Labs Advanced Photon Source, Chicago, IL, USA – invited seminar on “Photon counting with amorphous photoconductors”
  30. December 2009                 Division of Medical Imaging and Applied Mathematics, Office of Science and Engineering Labs, Center for Devices and Radiological Health, Food and Drug Administration, Washington, DC, USA – invited seminar on “Advanced Detector Architectures for Medical Imaging”
  31. November 2009                Argonne National Labs Advanced Photon Source, Chicago, IL, USA – invited seminar on “Advanced Detector Architectures for Medical Imaging”
  32. August 2009                     5th Annual CMOS Emerging Technologies Workshop, Vancouver, BC, Canada.  “Photon counting using amorphous selenium: Achieving hole dispersion limited count-rate using the Frisch grid detector design”
  33. April 2009                        International Display Manufacturers Conference 2009, Taipei, Taiwan  – Invited Paper and talk on “Advances in thin film transistor pixel amplifier technology for emerging large area imaging and display applications,”
  34. December 2008                 IEEE International Conference on Microelectronics, Sharjah, UAE – Tutorial on “Large Area Digital Imaging Technology,”  
  35. September 2008                Imagine Imaging: Biomedical Imaging Technologies – Half-Day Workshop organized by C4, Communitech, OPIN, Ontario Centres of Excellence and University of Waterloo. “Large area digital medical imagers”
  36. August 2008                     4th Annual CMOS Emerging Technologies Workshop, Vancouver, BC, Canada.  “Photon Counting Pixel in CMOS Technology for Real-time Imaging of Palladium Seed in Permanent Breast Seed Implantation”
  37. July 2008                          University of Waterloo Grad Student Talks, Waterloo, Ontario, Canada.  “Imaging pixel architectures: is smart always better?”
  38. May 2008                                     IEEE Canadian Conference on Electrical and Computer Engineering – Tutorial on “Large Area Digital Imaging Technology,” Niagara Falls, Canada, May 2008.  
  39. May 2008                         213th Meeting of the Electrochemical Society (Dielectrics for Nanosystems III session), Phoenix, USA.  “a-Si:H MSM photoconductor based pixel detector for biomolecular imaging applications”
  40. April 2008                        Center for Devices and Radiological Health, Food and Drug Administration, Washington, DC, USA.  “Gamma-ray Imaging of 103 Palladium Seeds for Permanent Breast Seed Implant (PBSI) Brachytherapy using direct detection amorphous selenium”
  41. Sep 2007                           University of Toronto Colloquium, Mississauga, Ontario, Canada.  “Intelligent pixel architectures for digital imaging applications”
  42. August 2007                     ULSI vs. TFT: 1st International Conference on Semiconductor Technology for Ultra Large Scale Integrated circuits and Thin Film Transistors, Barga, Italy.  “Intelligent pixel architectures for digital imaging applications”
  43. May 2007                         Nanotech BC, Vancouver, Canada. “High performance thin film silicon solar cells using hot-wire chemical vapor deposition”
  44. Nov 2006                          Interdisciplinary Research in the Mathematical And Computational Sciences (IRMACS) seminar series, Vancouver, Canada.  “Intelligent pixel architectures for digital imaging applications”
  45. Oct 2006                           210th Meeting of the Electrochemical Society (Integrated Optoelectronics session), Cancun, Mexico.   “Amorphous silicon pixel-level voltage controlled oscillator for digital imaging applications”
  46. February 2006                  Vancouver General Hospital - Medical Imaging Seminar Series.  “Selective Photon Counting Pixels for Medical Imaging Applications”
  47. May 2005                         UBC System-On-Chip Seminar Series.  “Amplified pixels in amorphous silicon technology for large area medical imaging applications”
  48. March 2005                      1st International TFT conference, Seoul, Korea.  “Amplified Pixel Architectures in Amorphous Silicon Technology for Large Area Digital Imaging Applications”
  49. August 2004                     Imaging Systems XRD Predevelopment, Philips Medical Systems, Best, Netherlands.  “High dynamic range pixel amplifiers in amorphous silicon technology for diagnostic medical imaging applications”
  50. May 2004                         Medical Imaging Seminar Series at Simon Fraser University.  “Large area medical imaging”
  51. April 2004                        Techmed 2004 tradeshow, Vancouver, BC, Canada.  “Large area thin film electronics”
  52. Dec 2003                           8th Annual Meeting for Pacific Centre for Advanced Materials and Microstructures (PCAMM), Vancouver, Canada.  “Large Area, Diagnostic X-ray Imaging Electronics”
  53. May 2002                         201th Meeting of the Electrochemical Society (Integrated Optoelectronics session), Philadelphia, PA, USA.  “On-Pixel Amorphous Silicon Amplifier for Digital Imaging”

Oral Talks

  1. June 2015                           World Congress on Medical Physics, Toronto, Canada. “Towards a $1000 digital X-ray imager for scalable and sustainable healthcare”
  2. May 2015                          Canadian Engineering Education Association (CEEA15) Conference, Hamilton, Canada. “Ethics 2.0: An introspective approach to understanding and taking ownership of your actions”
  3. February 2009                    SPIE Medical Imaging 2009: Physics of Medical Imaging, Orlando, Florida. “Evaluation of the X-Ray Response of Amorphous Selenium Coated 100 micron pixel pitch a-Si Active Pixel Sensors for Tomosynthesis Applications”
  4. December 2007                  IEEE International Electron Devices Meeting (IEDM), Washington, DC, USA.  “Two-Transistor Active Pixel Sensor for High Resolution Large Area Digital X-ray Imaging”
  5. August 2003                       11th Canadian Semiconductor Technology Conference, Ottawa, Canada.  “Noise performance of a current-mediated amplified pixel for medical imaging”
  6. February 2003                    SPIE Medical Imaging 2003: Physics of Medical Imaging, San Diego, CA, USA.  “Active Pixel Image Sensor for Large Area Medical Imaging”
  7. December 2002                  IEEE International Electron Devices Meeting, San Francisco, CA, USA.  “Amorphous silicon pixel amplifier with VT compensation for low noise digital fluoroscopy”
  8. October 2002                     201st Meeting of the Electrochemical Society (Thin Film Transistor Technologies VI), Salt Lake City, UT, USA.  “Reactive Ion Etching and Via Opening in Low Permittivity Inter-level Dielectric Films”
  9. May 2002                          Opto-Canada: SPIE Regional Meeting on Optoelectronics,Photonics&Imaging, Ottawa, Canada.  “Feasibility of current mediated amorphous silicon active pixel sensor readout circuits diagnostic medical imaging”
  10. August 2001                              International Conference on Amorphous and Microcrystalline Semiconductors, Nice, France.  “Amorphous silicon active pixel sensor architectures for large area medical imaging”
  11. May 2001                                  IEEE International Symposium on Circuits and Systems, Sydney, Australia.  “VHDL-AMS Modeling and Simulation of a Passive Pixel Sensor in a-Si:H Technology”
  12. February 2001               SPIE Medical Imaging 2001: Physics of Medical Imaging, San Diego, CA, USA.  “Alternate Pixel Architectures for Large Area Medical Imaging” - Received Best Paper Award
  13. October 2000                 198th Meeting of The Electrochemical Society (Thin Film Transistor Technologies V), Phoenix, AZ, USA.  “Active Pixel TFT Array for Digital Imaging Applications in a-Si:H Technology”

Poster

  1. February 2008     Physics of Medical Imaging, SPIE 2008 International Medical Imaging Symposium, San Diego CA, USA.  “High Resolution Amplified Pixel Sensor Architectures for Large Area Digital Mammography Tomosynthesis” Received Honorable Mention Poster Award
  2. February 2004     Physics of Medical Imaging, SPIE 2004 International Medical Imaging Symposium, San Diego CA, USA.  “High dynamic range pixel architectures for diagnostic medical imaging”  Received Best Poster Award
  3. October 2001      Communications and Information Technology Ontario (CITO) Knowledge Network conference, Toronto, Canada.  “Digital X-ray Imaging Arrays for Biomedical Applications” Received Best Poster award
  4. August 2001        10th Canadian Semiconductor Technology Conference, Ottawa, Canada.  “Design of multiplexer in amorphous silicon technology”
  5. August 2001        10th Canadian Semiconductor Technology Conference, Ottawa, Canada.  “Active pixel sensor architectures in a-Si:H for medical imaging”
  6. June 2001            Materials and Manufacturing Ontario (MMO): Partnerships 2001, Toronto, Canada.  "Digital X-ray Imaging Arrays for Biomedical Applications”
  7. September 1999  Communications Information Technology Ontario (CITO), Toronto, Canada.  “Intrinsic thin film stresses in multi-layered imaging pixels”
  8. November 1998   1st Canadian Workshop on RF IC Research and Development, Ottawa, Canada.  “WATCAP: A new simulation engine for interconnect capacitance extraction"

2.4 Academic Publications

The underlined authors are/were my graduate students, research engineers or postdoctoral fellows.

Book Chapters

1.Y. Fang, K.S. Karim, A. Badano, “Monte Carlo Modeling of X-ray Detectors for Medical Imaging,” in Semiconductor Radiation Detection Systems, Editor: Krzysztof Iniewski, 2012.

  1. M.M. Adachi, R. Khorasani, S. Saini, K.S. Karim, " Optical Properties of Silicon Nanowires," in Optical Spectroscopy Tools for Nanoscience & Nanotechnology, Editor: Challa Kumar, 2011.
  2. K.S. Karim, "Active Matrix Flat Panel Imagers for Diagnostic Medical Imaging Applications," in Electronics for Medical Imaging, Editors: Kris Iniewski, Wiley, 2008, May 2008.  25 pages text (12,000 words), 17 figures
  3. K.S. Karim, A. Nathan, "Large Area Digital Photon Imaging," in MEMS: A Practical Guide to Design, Analysis and Applications, Editors: Jan G. Korvink, Oliver Paul, 992 pages, ISBN: 0-8155-1497-2, December 2005.
  4. A. Nathan, P. Servati, K. S. Karim, A. Sazonov, and D. Stryahilev, "a-Si:H TFTs on Glass and Plastic," in a-Si:H Thin Film Transistors, Y. Kuo, Editor, Thin Film Transistors: Materials and processes, Kluwer Academic Publishers, ISBN 1402075049, 1000 pages, September 2003.
  5. S. Tao, K.S. Karim, P. Servati, A. Nathan, “Large Area Digital X-ray Imaging,” in Sensors, Update 10: Sensors Technology - Applications - Markets, H. Baltes, G.K. Fedder, G. Korvink, Editors, Wiley-VCH Verlag GmbH, ISBN: 3527303618, 312 pages, April 2002.

Peer Reviewed Journals (Accepted or in press)

  1. T. Nano, T. Escartin, E. Ismailova, K.S. Karim, J. Lindstrom, H.K. Kim, I. Cunningham, “Apodized Aperture Pixel Design for Improved Quantum Efficiency of X-ray Detectors,” IEEE Transactions on Medical Imaging, submitted October 2015. (8 journal pages)
  2. A. Hamouda, K.S. Karim, M. Anis, “MIB (Model-based Initial Bias): Towards a Single Iteration Optical Proximity Correction,” IEEE Transactions on Computer Aided Design, accepted December 2015, in press (6 journal pages).
  3. S. Abbaszadeh, S. Ghaffari, S. Siddiquee, M.Z. Kabir, K.S. Karim, “Characterization of lag signal in amorphous selenium detectors,” IEEE Transactions on Electron Devices, accepted December 2015, in press (6 journal pages)
  4. C.C. Scott, A. Parsafar, A. El-Falou, P. M. Levine, K.S. Karim, “High Dose Efficiency, Ultra-high Resolution Amorphous Selenium/CMOS Hybrid Digital X-ray Imager,” IEEE International Electron Devices Meeting (IEDM) Technical Digest, October 2015, in press. (4 journal pages)
  5. S. Ghaffari, S. Abbaszadeh, S. Ghanbarzadeh, K.S. Karim, “Characterization of Optically Sensitive Amorphous Selenium Photodetector at High Electric Fields,” IEEE Transactions on Electron Devices, May 2015, in press. (6 journal pages)
  6. K. Wang, S. Abbaszadeh, K.S. Karim, J.A. Rowlands, A. Reznik, “Reactive ion assisted deposition of cerium oxide hole-blocking contact for leakage current suppression in amorphous selenium multilayer structure,” IEEE Sensors Journal, 15(7), pp.3871-6, July 2015.  (6 journal pages)
  7. A. Parsafar, C. Scott, A. El-Falou, P. Levine, K.S. Karim, “Direct-Conversion CMOS X-Ray Imager with 5.6 μm × 6.25 μm Pixels,” IEEE Electron Device Letters, 36(5), pp. 481-3, May 2015.  (3 journal pages)
  8. G.P. Lindberg, T. O’Loughlin, N. Gross, A. Mishchenko, A. Reznik, S. Abbaszadeh, K.S. Karim, G. Belev, B. Weinstein, “Photo-crystallization in a-Se layer structures: effects of film-substrate interface-rigidity,” Journal of Applied Physics, vol. 116, November 2014. (6 journal pages).
  9. S. Abbaszadeh, A. Tari, W.S. Wong, K.S. Karim, "Enhanced Dark Current Suppression of Amorphous Selenium Detector With Use of IGZO Hole Blocking Layer," IEEE Transactions on Electron Devices, 61, no. 9, pp. 3355-3357, September 2014.
  10. U. Shafique, C. Santato, K.S. Karim, “Lateral Organic Semiconductor Photodetector I: Use of an Insulating Layer for Low Dark Current,” IEEE Transactions on Electron Devices, August 2014, in press. (6 journal pages)
  11. Y. Fang, K.S. Karim, A. Badano, "Monte Carlo Modeling of the DQE of a-Se X-Ray Detectors for Breast Imaging," Breast Imaging, Lecture Notes in Computer Science, vol. 8539, pp. 387-393, January 2014 (7 journal pages).
  12. Y. Fang, KS. Karim, A. Badano. "Effect of burst and recombination models for Monte Carlo transport of interacting carriers in a-Se x-ray detectors on Swank noise." Medical Physics 41(1), January 2014. (6 journal pages).
  13. S. Ghanbarzadeh, S. Abbaszadeh, KS Karim, “Low dark current amorphous silicon Metal-Semiconductor-Metal photodetector for digital imaging applications,” IEEE Electron Device Letters, January 2014 (3 journal pages)
  14. S. Abbaszadeh, CC Scott, O Bubon, A Reznik, KS Karim, “Enhanced detection efficiency of direct conversion X-ray detector using polyimide as hole-blocking layer,” Scientific Reports, December 2013 (4 journal pages)
  15. M.M. Adachi, KS Karim, “Core-shell homoepitaxial silicon nanowires,” Chemical Physical Letters 583, pp 141-5, September 2013 (5 journal pages)
  16. A.H. Goldan, J.A. Rowlands, O. Tousignant, K.S. Karim, “Unipolar Time-Differential Charge-Sensing in Non-Dispersive Amorphous Solids,” Journal of Applied Physics, June 2013.
  17. S. Abbaszadeh, N. Allec, KS Karim, “Characterization of low dark-current lateral amorphous-selenium metal-semiconductor-metal photodetectors,” IEEE Sensors 13(5), pp 1452-8, May 2013. (7 journal pages)
  18. N. Allec, S. Abbaszadeh, C.C. Scott, K.S. Karim, J. Lewin, “Evaluating noise reduction techniques while considering anatomical noise in dual-energy contrast-enhanced mammography,” Medical Physics, March 2013. (7 journal pages)
  19. M.M.Adachi, M.P. Anantram, K.S. Karim, “Core-shell silicon nanowire solar cells,” Scientific Reports, March 2013. (6 journal pages)
  20. S. Abbaszadeh, N.Allec, K.S. Karim, "Improving Amorphous Selenium Photodetector Performance Using an Organic Semiconductor", Key Engineering Materials, Vol. 543, pp. 451-454, March 2013. (4 journal pages)
  21. M. Khorasaninejad, MM Adachi, J Walia, KS Karim, SS Saini, “Raman spectroscopy of core-shell silicon nanowires grown on different substrates,” Physica Status Solidi A 210(2) pp 373-7, February 2013 (5 journal pages)
  22. S. Abbaszadeh, K.S. Karim, V. Karanassios, “Measurement of UV from a microplasma by a microfabricated amorphous selenium detector,” IEEE Transactions on Electron Devices, 60(2) pp. 880-3, February 2013. (4 journal pages)
  23. G.P. Lindberg, R.E. Tallman, S. Abbaszadeh, K.S. Karim, J.A. Rowlands, A. Reznik, B.A. Weinstein, “Frustration of Photocrystallization in Amorphous Selenium Films and Film-polymer Structures Near the Glass Transition,” AIP Proceedings Journal, December 2012. (2 journal pages)
  24. N. Allec, S. Abbaszadeh, C. Scott, J. Lewin, K.S. Karim, “Including the effect of motion artifacts in noise and performance analysis of dual-energy contrast-enhanced mammography,” Journal of Physics in Medicine and Biology, Vol. 57, December 2012. (24 journal pages, double column, 10 pt font)
  25. A. Goldan, O. Tousignant, K.S. Karim, J.A. Rowlands, “Solid-State Charpak Detector with Unipolar Time-Differential Pulse Response,” Applied Physics Letters, November 2012. (5 journal pages)
  26. N. Allec, S. Abbaszadeh, A. Fleck, O. Tousignant, K.S. Karim, “K-edge imaging using dual-layer large area flat panel imagers,” IEEE Transactions on Nuclear Science, October 2012. (7 journal pages)
  27. M. Yazdandoost, K.S. Karim, “Photon Quantum Noise Limited Pixel Architecture in Amorphous Silicon Technology for Large Area Digital Imaging Applications,” IEEE Transactions on Electron Devices, October 2012. (6 journal pages)
  28. S. Abbaszadeh, N. Allec, S. Ghanbarzadeh, U. Shafique, K.S. Karim, “Investigation of hole-blocking contacts for high conversion gain amorphous selenium detectors for X-ray imaging,” IEEE Transactions on Electron Devices, July 2012. (6 journal pages)
  29. P.K. Singh, G. Chatterjee, A.D. Lad, A. Adak, S. Ahmed, M. Khorasaninejad, M.M. Adachi, K.S. Karim, S.S. Saini, A.K. Sood, G.R. Kumar, “Efficient generation and guiding of megaampere relativistic electron current by silicon nanowires,” Applied Physics Letters, June 2012. (3 journal pages)
  30. S. Abbaszadeh, K. Rom, O. Bubon, B. A. Weinstein, K.S. Karim, J.A. Rowlands, A. Reznik, “The effect of the substrate on transient photodarkening in stabilized amorphous selenium,” Journal of Non-Crystalline Solids, doi:10.1016/j.jnoncrysol.2011.12.098, 2012. (4 journal pages)
  31. Y. Fang, A. Badal, N. Allec, K.S. Karim, A. Badano, “Spatio-temporal Monte Carlo transport methods in x-ray semiconductor detectors: Application to pulse-height spectroscopy in a-Se,” Medical Physics, vol 39, pp 308-19, December 2011.
  32. S. Abbaszadeh, N. Allec, K. Wang, K.S. Karim, “Low dark current lateral amorphous selenium metal-semiconductor-metal photodetector,” IEEE Electron Device Letters, 32(9), pp. 1263-5, September 2011.
  33. N. Allec, S. Abbaszadeh, K.S. Karim, “Single layer and dual layer contrast-enhanced mammography using amorphous selenium flat panel detectors,” Journal of Physics in Medicine and Biology, Vol. 56, pp. 5903-5923, August 2011.
  34. D. Sharma, Y. Fang, F. Zafar, K.S. Karim, A. Badano, “Recombination models for spatio-temporal Monte Carlo transport of interacting carriers in semiconductors,” Applied Physics Letters, 98, 242111, June 2011. (3 journal pages)
  35. K. Wang, F. Chen, N. Allec, Y. Fang, G. Belev, S. Kasap, K.S. Karim, “Amorphous Selenium-Based Three-Terminal X-Ray Detector with a Gate,” IEEE Electron Device Letters, 32(6), pp. 782-4, June 2011.
  36. S.O. Kasap, J. Frey, G. Belev, O. Tousignant, H. Mani, J. Greenspan, L. Laperriere, O. Bubon, A. Reznik, G Decrescenzo, K.S. Karim, J.A. Rowlands, “Amorphous and Polycrystalline Photoconductors for Direct Conversion Flat Panel X-Ray Image Sensors,” Sensors Journal, 11, pp. 5112-5157, 2011.  INVITED
  37. F. Chen, K. Wang, Y. Fang, N. Allec, G. Belev, S.O. Kasap, K.S. Karim, “Direct Conversion X-ray Detector Using Lateral Amorphous Selenium Structure,” IEEE Sensors Journal, 11(2), pp. 505-9, February 2011.
  38. M.M. Adachi, M.P. Anantram, K.S. Karim, “Optical Properties of Crystalline-Amorphous Core-Shell Silicon Nanowires,” NanoLetters, 10, pp. 4093–4098, 2010.
  39. M. H. Izadi, O. Tousignant, M.F. Mokam, K.S. Karim, “An a-Si Active Pixel Sensor (APS) Array for Medical X-ray Imaging,” IEEE Transactions on Electron Devices, 57(11), pp. 3020-6, November 2010.
  40. K. Wang, F. Chen, N. Allec, K.S. Karim, “Fast Lateral Amorphous Selenium Metal-Semiconductor Photodetector with High Blue-to-ultraviolet Responsivity,” IEEE Transactions on Electron Devices, 57(8), pp. 1953-8, August 2010.
  41. A.H. Goldan, K.S. Karim, O. Tousignant, L. Laperrière, “Reduced photocurrent lag using unipolar solid-state photoconductors: application to stabilized n-i-p amorphous selenium,” Applied Physics Letters, vol. 96, Feb 2010. (3 journal pages)
  42. K. Wang, K.S. Karim, “Silicon X-ray Detector with Integrated Thin Film Transistor for Biomedical Applications,” IEEE Electron Device Letters, vol. 31(2) pp. 147-149, 2010.
  43. A. Sultana, M.Wronski, K. S. Karim, J. A. Rowlands, "Digital x-ray imaging using avalanche a-Se photoconductor," IEEE Sensors Journal, vol. 10, no. 2, pp. 347-352, February 2010.
  44. K. Wang, F. Chen, G. Belev, S.O. Kasap, K.S. Karim, “Lateral metal-semiconductor-metal photodetectors based on amorphous selenium,” Applied Physics Letters, 95(1), July 2009. (3 journal pages)
  45. A. Sultana, J.A. Rowlands, K.S. Karim, “The Effect of K-edge Reabsorption of Selenium on the Performance of a Protein Crystallography Detector,” Physica Status Solidi C: Current Topics in Solid State Physics, Volume 6 Issue S1, Pages S231 - S235, April 2009.
  46. N. Safavian, M.H. Izadi, A. Sultana, K.S. Karim, A. Nathan, J.A. Rowlands, “Noise Analysis of a Novel Hybrid Active-Passive Pixel for Medical X-ray Imaging,” Physica Status Solidi C: Current Topics in Solid State Physics, Volume 6 Issue S1, Pages S258 - S262, April 2009.
  47. F. Taghibakhsh, K.S. Karim, G. Belev, S.O. Kasap, “X-Ray Detection using a Two-Transistor Amplified Pixel Sensor Array Coupled to an a-Se X-ray Photoconductor,” IEEE Sensors, vol. 9(1), pp. 51-56, January 2009.
  48. A. Sultana, K.S. Karim, J.A. Rowlands, “Avalanche Selenium Detector for Protein Crystallography,” IEEE Canadian Journal of Electrical and Computer Engineering, v. 33 (3/4), pp. 139-43, 2008.  INVITED 
  49. A. Sultana, K.S. Karim, A. Reznik, J.A. Rowlands, “Design and feasibility of active matrix flat panel detector using avalanche amorphous selenium for protein crystallography,” Medical Physics, vol. 35(10), pp. 4324-32, October 2008.
  50. I. Khodami, F. Taghibakhsh, K.S. Karim, “UV selective a-Si:H Metal-Semiconductor-Metal Photodetector for Biomolecular Imaging Applications,” IEEE Electron Device Letters, Vol. 29, no. 9, pp. 1007-9, September 2008.
  51. F. Taghibakhsh, K.S. Karim, “Charge-Gated Thin Film Transistors for High Resolution Digital Imaging Applications,” IEEE Electron Device Letters, vol. 29, no. 8, pp. 859-862, August 2008.
  52. F. Taghibakhsh, K.S. Karim, “Two-Transistor Active Pixel Sensor Readout Circuits in Amorphous Silicon Technology for High Resolution Digital Imaging Applications,” IEEE Transactions on Electron Devices, vol. 55, no. 8, pp. 2121-2128, August 2008.
  53. M.M. Adachi, K. Kavanagh, K.S. Karim, "Structural and Electrical Characteristics of Nanocrystalline Silicon Prepared by Hot-wire Chemical Vapor Deposition on Polymer Substrates," Thin Solid Films, Volume 516, Issue 21, Pages 7418-7421, September 2008.
  54. K.S. Karim, I. Khodami, F. Taghibakhsh, “a-Si:H Metal-Semiconductor-Metal (MSM) Photoconductor Detector for Biomolecular Imaging Applications,” ECS Transactions, 13(2), pp. 179-88,  2008.  INVITED
  55. F. Taghibakhsh, I. Khodami, K.S. Karim, “Characterization of Short-Wavelength-Selective a-Si:H MSM Photoconductors for Large-Area Digital-Imaging Applications,” IEEE Transactions on Electron Devices, 55(1),  pp. 337–342, Jan. 2008.
  56. K.S. Karim, M.H. Izadi, F. Taghibakhsh, G. Sanaie, "Intelligent Pixel Architectures for Digital Medical Imaging Applications," ECS Transactions, 8(1), pp. 289-293, July 2007. INVITED
  57. M.H. Izadi, K.S. Karim, “Noise Optimization of an Active Pixel Sensor for Low-Noise Real-Time X-ray Fluoroscopy,” IEE Proceedings On Circuits, Devices and Systems, 1(3), pp. 251 – 256, June 2007.
  58. M.M. Adachi, K. Kavanagh, K.S. Karim, “Structural and Electrical Characteristics of Microcrystalline Silicon prepared by Hot-wire Chemical Vapor Deposition Using a Graphite Filament,” J. Vacuum Science and Tech A, 25(3), pp. 464-7, May 2007.
  59. F. Taghibakhsh, K.S. Karim, “A High Dynamic Range 2-TFT Amplified Pixel Sensor Architecture for Digital Mammography Tomosynthesis,” IEE Proceedings On Circuits, Devices and Systems, 1(1), pp. 87-92, Feb 2007.
  60. G. Sanaie, K.S. Karim, “On-pixel Voltage Controlled Oscillator in Amorphous Silicon Technology for Digital Imaging Applications,” IEEE Electron Device Letters, 28(1), pp.33-5, Jan. 2007.
  61. A.H. Goldan, K.S. Karim, J.A. Rowlands, "Single Photon Counter for Digital X-ray Mammography Tomosynthesis," Journal of Vacuum Science and Technology A, 24(3), pp 854-859, May 2006.
  62. F. Taghibakhsh, K.S. Karim, A. Madan, "Low leakage a-Si:H Thin Film Transistors deposited on Glass Substrates using Hot Wire Chemical Vapor Deposition," Journal of Vacuum Science and Technology A, 24(3), pp 866-868, May 2006.
  63. M.H. Izadi, K.S. Karim, "High dynamic range pixel architecture for advanced diagnostic medical X-ray imaging applications," Journal of Vacuum Science and Technology A, 24(3), pp 846-849, May 2006.
  64. T. Ottaviani, K.S. Karim, J.A. Rowlands, A. Nathan, "A Low Noise Circuit Solution That Permits a Higher Output SNR for Current Mediated Active Pixel Sensors," Journal of Vacuum Science and Technology A, 24(3), pp 770-773, May 2006.
  65. K.S. Karim, G. Sanaie, T. Ottaviani, M.H. Izadi, F. Taghibakhsh, "Amplified Pixel Architectures in Amorphous Silicon Technology for Large Area Digital Imaging Applications," Journal of Korean Physical Society, vol. 48(1), pp. 85-91, Jan. 2006. 
  66. K.S. Karim, A. Nathan, “Noise performance of a current-mediated amplified pixel for medical imaging,” Journal of Vacuum Science and Technology A, vol. 22, pp. 1010-1014, 2004.
  67. K.S. Karim, A. Nathan, M. Hack, W. Milne, “Drain-Bias dependence of threshold voltage stability of amorphous silicon TFTs,” IEEE Electron Device Letters, 25(4), pp. 188-190, April 2004. 
  68. K.S. Karim, P. Servati, A. Nathan, “High Voltage Amorphous Silicon TFT for use in Large Area Applications,” Microelectronics Journal, 35(3), pp. 311-315, Mar 2004. 
  69. L. Stamenic, E. Smiley, K.S. Karim, "Low light conditions modelling for building integrated photovoltaic (BIPV) systems," Solar Energy, v. 77, pp. 37-45, Mar 2004. 
  70. A. Nathan, A. Kumar, K. Sakariya, P. Servati, K.S. Karim, D. Striakhilev, A. Sazonov, "Amorphous silicon back-plane electronics for OLED displays," IEEE Journal of Selected Topics in Quantum Electronics, vol. 10, pp. 58-69, Feb 2004.
  71. K.S. Karim, A. Nathan, J.A. Rowlands, S.O. Kasap, "X-ray detector with on-pixel amplification for large area diagnostic medical imaging," IEE Proceedings on Circuits, Devices and Systems, 150(4), pp. 267-273, August 2003.
  72. A. Kumar, K. Sakariya, P. Servati, S. Alexander, D. Striakhilev, K.S. Karim, A. Nathan, M. Hack, E. Williams, G.E. Jabbour, "Design considerations for active matrix organic light emitting diode arrays," IEE Proceedings on Circuits, Devices and Systems, 150(4), pp. 322-328, August 2003. 
  73. A. Nathan, P. Servati, K.S. Karim, D. Striakhilev, A. Sazonov, "Thin film transistor integration on glass and plastic substrates in amorphous silicon technology," IEE Proceedings on Circuits, Devices and Systems, 150(4), pp. 329-338, August 2003. 
  74. P. Servati, K.S. Karim, A. Nathan, “Static characteristics of a-Si:H Dual-Gate TFTs,” IEEE Transactions on Electron Devices, 50(4), pp. 926-932, April 2003. 
  75. K.S. Karim, A. Nathan, J.A. Rowlands, “Amorphous silicon active pixel sensor readout circuit for digital imaging,” IEEE Transactions on Electron Devices: Special Issue on Image Sensors, 50(1), pp.200-208, January 2003. 
  76. N. Mohan, K.S. Karim, A. Nathan, “Design of multiplexer in amorphous silicon technology,” J. Vacuum Sci Tech A, 20(3), pp. 1043-1047, May 2002. 
  77. K.S. Karim, A. Nathan, J.A. Rowlands, “Active pixel sensor architectures in a-Si:H for medical imaging,” ,” J. Vacuum Sci Tech A, 20(3), pp. 1095-1099, May 2002. 
  78. K.S. Karim, A. Nathan, J.A. Rowlands, “Amorphous silicon active pixel sensor architectures for large area medical imaging,” Journal of Non-Crystalline Solids, 299-302, Part 2, pp. 1250-1255, April 2002. 
  79. K.S. Karim, A. Nathan, “Readout circuit in active pixel sensors in amorphous silicon technology,” IEEE Electron Device Letters, 22(10), pp. 469-471, October 2001. 
  80. A. Nathan, B. Park, A. Sazonov, S. Tao, I. Chan, P. Servati, K. Karim, T. Charania, D. Striakhilev, Q. Ma, and R.V.R. Murthy, “Amorphous Silicon Detector and Thin Film Transistor Technology for Large Area Imaging of X-rays,” Microelectronics Journal, vol. 31, No. 11-12, pp. 883-891, October 2000. 
  81. B. Park, K.S. Karim, A. Nathan, "Intrinsic thin film stresses in multi-layered imaging pixels," Journal of Vacuum Science and Technology A, 18(2), pp. 688-692, March 2000.

Conference Papers

  1. C. C. Scott, A. Parsafar, A. El-Falou, P. M. Levine, K. S. Karim, “High Dose Efficiency, Ultra-high Resolution Amorphous Selenium/CMOS Hybrid Digital X-ray Imager,” in the 2015 IEEE International Electron Devices Meeting (IEDM), accepted as oral.
  2. T. Nano, T. Escartin, K.S. Karim, I. Cunningham, “The new generation of x-ray detectors: higher DQE and less aliasing with lower exposures,” in SPIE Medical Imaging 2016: Physics of Medical Imaging, San Diego, USA, accepted as oral.
  3. M.K. Russ, A. Jain, S.V.S. Nagesh, C.N. Ionita, C.C. Scott, K.S. Karim, D. R. Bednarek, S. Rudin, “Quantitative comparison using generalized relative object detectability (G-ROD) metrics of an amorphous selenium detector with high-resolution microangiographic fluoroscopes (MAF) and standard flat panel detectors (FPD),” in SPIE Medical Imaging 2016: Physics of Medical Imaging, San Diego, USA, accepted as poster.
  4. S.L. Maurino, I. Cunningham, K.S. Karim, “Theoretical and Monte Carlo optimization of a stacked three-layer flat-panel x-ray imager for applications in multi-spectral diagnostic medical imaging,” in SPIE Medical Imaging 2016: Physics of Medical Imaging, San Diego, USA, accepted as poster.
  5. K.S. Karim, “Ethics 2.0:  An introspective approach to understanding and taking ownership of your actions,” in Canadian Engineering Education Association Annual Conference, Hamilton, Canada, accepted as oral, May 2015.
  6. M. Russ, S. V. Setlur Nagesh, C. N. Ionita, C. Scott, K. S. Karim, D. R. Bednarek, S. Rudin, “Relative Object Detectability Evaluation of a New High Resolution a-Se Direct Detection System Compared to other Indirect Micro-Angiographic Fluoroscopic (MAF) Detectors,” in American Association of Physicists in Medicine (AAPM) Annual Meeting, March 2015, accepted as oral.
  7. E. Ismailova, K.S. Karim, I. Cunningham, “Apodized-Aperture Pixel Design to Increase High-Frequency DQE and Reduce Noise Aliasing in X-Ray Detectors,” in SPIE Medical Imaging 2015: Physics of Medical Imaging, Orlando, USA, February 2015.
  8. C.C. Scott, S. Abbaszadeh, S. Ghanbarzadeh, G. Allan, M. Farrier, I. Cunningham, K.S. Karim, “Direct conversion x-ray imager with 25 micron pixel resolution for medical imaging applications,” Annual Meeting of the Radiological Society of North America (RSNA), accepted as oral, November 2014.
  9. R.S. Mann, S. Ghanbarzadeh, K.S. Karim, “System design of a low-cost digital x-ray detector,” in Proceedings of the IEEE International Health Technology Conference, Montreal, Canada, June 2014.
  10. U. Shafique, K.S. Karim, “UV Lateral Organic Semiconductor Photoconductor with Low Dark Current at High Electric Field,” Materials Research Society Symposium, San Francisco, USA, April 2014.
  11. C.C. Scott, S. Abbaszadeh, S. Ghanbarzadeh, G. Allan, M. Farrier, I. Cunningham, K.S. Karim, “Amorphous selenium direct detection CMOS digital x-ray imager with 25 micron resolution,” in SPIE Medical Imaging 2014: Physics of Medical Imaging, San Diego, USA, February 2014.
  12. S. Abbaszadeh, S. Ghaffari, K.S. Karim, “Investigation of electrical conduction in polyimide/amorphous selenium films under high electric fields,” in 25th International Conference on Amorphous and Nanocrystalline Semiconductors, Toronto, Canada, August 2013.
  13. S. Abbaszadeh, K. Wang, A. Reznik, J. A. Rowlands, K. S. Karim, “Ion beam assisted deposition of a mixed cerium oxide hole blocking contact for multilayer amorphous selenium devices,” in Canadian Semiconductor Science and Technology Conference, Thunder Bay, Canada, August 2013.
  14. S. Abbaszadeh, R. Keshavarzi, K. Wang, K. S. Karim, “Indirect conversion digital X­ray imager using an amorphous selenium photoconductor,” in 223rd Electrochemical Society Meeting, Toronto, Canada, May 2013.
  15. S. Abbaszadeh, K. S. Karim, V. Karanassios, “A low dark current a­Se detector for measurement microplasma emission in the UV for possible use on­site,” in SPIE Defence, Security and Sensing, Baltimore, USA, May 2013.
  16. S. Abbaszadeh, Z. Du, N. Allec, K. S. Karim, “Application of organic semiconductors in amorphous selenium based photodetectors for high performance X­ray imaging,” in SPIE Medical Imaging 2013: Physics of Medical Imaging, Orlando, USA, February 2013.
  17. R. Mann, I.A. Cunningham, K.S. Karim, “Characterization of a digital x­ray detector for region of interest tuberculosis screening,” in SPIE Medical Imaging 2013: Physics of Medical Imaging, Orlando, USA, February 2013.
  18. S. Ghanbarzadeh, S. Abbaszadeh, M. M. Adachi, K. S. Karim, “Low dark current and high dynamic range a­Si:H MSM photodetector for large area medical imaging,” in SPIE Medical Imaging 2013: Physics of Medical Imaging, Orlando, USA, February 2013.
  19. Y. Fang, A. Badal, A. Badano, K.S. Karim, “Spatial resolution characteristics of a­Se imaging detectors using Monte Carlo methods with detailed spatiotemporal transport of x­rays, electrons, and electron­hole pairs under applied bias,” in SPIE Medical Imaging 2013: Physics of Medical Imaging, Orlando, USA, Feb 2013.
  20. KW. Shin, K.S. Karim, “Fabrication and characterization of a novel x­ray silicon detector,” in SPIE Medical Imaging 2013: Physics of Medical Imaging, Orlando, USA, Feb 2013.
  21. S. Abbaszadeh, N. Allec, K.S. Karim, “Study of the Transient Response of PI/a-Se Photodetectors for Indirect Conversion Medical Imaging,” IEEE Nuclear Science Symposium and Medical Imaging Conference, accepted for oral, August 2012.
  22. R. Khorasani, M.M. Adachi, J. Walia, K.S. Karim, S.S. Saini, “Raman Spectrum of Core-Shell Silicon Nanowires on Different Substrates,” 2012 Optical MEMS and Nanophotonics conference, abstract accepted, May 2012.
  23. Y. Fang, E. O’Bryan, S. Abbaszadeh, H. Majid, R. Jennings, C. Marini-Bettolo, N. Allec, K.S. Karim, A. Badano, “Pulse-Height Spectroscopy of Amorphous Selenium Semiconductor Detectors for X-ray Imaging Applications,” in IEEE Symp. On Radiation Measurements and Applications, accepted April 2012.
  24. Y. Fang, D. Sharma, A. Badal, K.S. Karim, A. Badano, “Recombination models for the Monte Carlo simulation of a-Se detectors for breast imaging: Effect on Swank noise,” in 11th International Workshop on Breast Imaging 2012, accepted April 2012.
  25. G.P. Lindberg, R.E. Tallman, B.A. Weinstein, S. Abbaszadeh, K.S. Karim, A. Reznik, “Substrate- and interface-mediated photocrystallization in a-Se films and multi-layers,” in American Physical Society Meeting, vol 57(1), March 2012.
  26. C. Scott, N. Allec, K.S. Karim, “A study of factors limiting spatial resolution using a 25 μm pixel pitch direct detection amorphous selenium photoconductor,” in SPIE Medical Imaging 2012: Physics of Medical Imaging, San Diego, USA, Feb 2012.
  27. S. Abbaszadeh, S.H. Majid, N. Allec, K.S. Karim, “Amorphous selenium photodetector on a flexible substrate for indirect conversion medical imaging,” in SPIE Medical Imaging 2012: Physics of Medical Imaging, San Diego, USA, Feb 2012.
  28. S. Abbaszadeh, N. Allec, K.S. Karim, “High performance amorphous selenium lateral photodetector,” in SPIE Medical Imaging 2012: Physics of Medical Imaging, San Diego, USA, Feb 2012.
  29. R. Keshavarzi, K. Wang, M. Yazdandoost, K-W Shin, F. Chen, S.H. Majid, S. Abbaszadeh, K.S. Karim, “Performance of a prototype 32x32 pixel indirect x-ray imager based on a lateral selenium passive pixel sensor,” in SPIE Medical Imaging 2012: Physics of Medical Imaging, San Diego, USA, Feb 2012.
  30. S. H. Majid, K. Wang, U. Shafique, N. Allec, K.S. Karim, “Characterization of a gated selenium x-ray detector,” in SPIE Medical Imaging 2012: Physics of Medical Imaging, San Diego, USA, Feb 2012.
  31. N. Allec, S. Abbaszadeh, J.M. Lewin, K.S. Karim, “Motion artifacts in dual-energy contrast-enhanced mammography,” in SPIE Medical Imaging 2012: Physics of Medical Imaging, San Diego, USA, Feb 2012.
  32. K-W Shin, K. Wang, N. Allec, Y. Fang, K.S. Karim, “Novel silicon x-ray detector with TFT readout,” in SPIE Medical Imaging 2012: Physics of Medical Imaging, San Diego, USA, Feb 2012.
  33. Y. Fang, A. Badal-Soler, K.S. Karim, A. Badano, “Spatio-temporal Monte Carlo modeling of a-Se detectors for breast imaging: energy-weighted Swank noise and detective quantum efficiency,” in SPIE Medical Imaging 2012: Physics of Medical Imaging, San Diego, USA, Feb 2012.
  34. S. Abbaszadeh, K. Rom, O. Bubon, B. A. Weinstein, K.S. Karim, J.A. Rowlands, A. Reznik, “The effect of the substrate on transient photodarkening in stabilized amorphous selenium,” in 24th International Conference on Amorphous and Nano-crystalline semiconductors, Japan, August 2011.
  35. A.Y. Hamouda, M.H. Anis, K.S. Karim, “Aerial image retargeting (AIR): achieving litho-friendly designs,” in SPIE Advanced Lithography 2011 conference, California, USA.
  36. U. Shafique, K.S. Karim, “Lateral organic photodetectors for imaging applications,” in SPIE Medical Imaging 2011: Physics of Medical Imaging, Orlando, FL, Feb 2011.
  37. C. Hristovski, A. Goldan, S.H. Majid, K. Wang, U. Shafique, K.S. Karim, “Characterization and comparison of lateral amorphous semiconductors with embedded Frisch grid detectors on 0.18μm CMOS processed substrate for medical imaging applications,” in SPIE Medical Imaging 2011: Physics of Medical Imaging, Orlando, FL, Feb 2011.
  38. N. Allec, S. Abbaszadeh, K.S. Karim, “Analysis of multilayer and single layer x-ray detectors for contrast-enhanced mammography using imaging task,” in SPIE Medical Imaging 2011: Physics of Medical Imaging, Orlando, FL, Feb 2011.
  39. K. Wang, M.Y. Yazdandoost, K.W. Shin, F. Chen, S.H. Majid, S. Abbaszadeh, R. Keshavarzi, M. Mayer, K.S. Karim, “Integration of an amorphous silicon passive pixel sensor array with a lateral amorphous selenium detector for indirect conversion x-ray imaging applications,” in SPIE Medical Imaging 2011: Physics of Medical Imaging, Orlando, FL, Feb 2011.
  40. M.Y. Yazdandoost, K. Wang, K.S. Karim, “Photon quantum shot noise limited array in amorphous silicon technology for protein crystallography applications,” in SPIE Medical Imaging 2011: Physics of Medical Imaging, Orlando, FL, Feb 2011.
  41. S. Abbaszadeh, N. Allec, K. Wang, F. Chen, K.S. Karim, “Study of gain phenomenon in lateral metal-semiconductor-metal detectors for indirect conversion medical imaging,” in SPIE Medical Imaging 2011: Physics of Medical Imaging, Orlando, FL, Feb 2011.
  42. S.H. Majid, A. Goldan, B. Hadji, G. Belev, S.O. Kasap, K.S. Karim, “Selenium coated CMOS passive pixel array for medical imaging,” in SPIE Medical Imaging 2011: Physics of Medical Imaging, Orlando, FL, Feb 2011.
  43. Y. Fang, A. Badal, N. Allec, K.S. Karim, A. Badano “Detection Statistics in Amorphous Selenium Using Monte Carlo Simulation of X-ray, Electron, and Electron Hole Pair Transport,” in Radiological Society of North America Annual Symposium, Physics Session, Chicago, USA November 2010.
  44. K. Wang, K.S. Karim, “Lateral Amorphous Selenium Detector for Large Area, High Speed, and High Energy X-ray Imaging,” in Radiological Society of North America Annual Symposium, Physics Session, Chicago, USA November 2010.
  45. N. Allec, K.S. Karim, “Comparison of Single Layer Dual Exposure and Dual Layer Single Exposure Contrast-enhanced Digital Subtraction Mammography Using Amorphous Selenium Direct Detectors,” in Radiological Society of North America Annual Symposium, Physics Session, Chicago, USA November 2010.
  46. M.M. Adachi, K.S. Karim, “Fabrication of PECVD grown n-i-p silicon nanowire solar cells,” in Proceedings of the 35th IEEE Photovoltaic Specialists Conference, Hawaii, USA, 2010.
  47. Y. Fang, A. Badal, N. Allec, K.S. Karim, A. Badano, “Monte Carlo simulation of amorphous selenium imaging detectors,” in SPIE Medical Imaging 2010: Physics of Medical Imaging, San Diego, USA, Feb 2010.
  48. K. Wang, K-W. Shin, K.S. Karim, “Amorphous selenium metal-semiconductor-metal photodetector integrated with an amorphous silicon passive pixel sensor array for large area, high speed, indirect detection, medical imaging applications,” in SPIE Medical Imaging 2010: Physics of Medical Imaging, San Diego, USA, Feb 2010.
  49. M. Yazdandoost, K-W. Shin, N. Safavian, K.S. Karim, “Photon counting pixel and array in amorphous silicon technology for large area digital medical imaging applications,” in SPIE Medical Imaging 2010: Physics of Medical Imaging, San Diego, USA, Feb 2010.
  50. M. Yazdandoost, K.S. Karim, “Pixel electronic noise as a function of position in an active matrix flat panel imaging array,” in SPIE Medical Imaging 2010: Physics of Medical Imaging, San Diego, USA, Feb 2010.
  51. N. Allec, K.S. Karim, “Multilayer x-ray detector for contrast-enhanced digital subtraction mammography,” in SPIE Medical Imaging 2010: Physics of Medical Imaging, San Diego, USA, Feb 2010.
  52. N. Safavian, M. Yazdandoost, D. Wu, M.H. Izadi, K.S. Karim, J.A. Rowlands, “Gain uniformity in a novel two TFT, current programmed amorphous silicon active pixel sensor for fluoroscopy, chest radiography and mammography tomosynthesis applications,” in SPIE Medical Imaging 2010: Physics of Medical Imaging, San Diego, USA, Feb 2010.
  53. D. Wu, N. Safavian, M. Yazdandoost, M.H. Izadi, K.S. Karim, “Electronic noise comparison of amorphous silicon current mode and voltage mode active pixel sensors for large area digital x-ray imaging,” in SPIE Medical Imaging 2010: Physics of Medical Imaging, San Diego, USA, Feb 2010.
  54. A. Goldan, K. Wang, F. Chen, K.S. Karim, “Amorphous selenium lateral Frisch photodetector and photomultiplier for high performance medical x-ray and gamma-ray imaging applications,” in SPIE Medical Imaging 2010: Physics of Medical Imaging, San Diego, USA, Feb 2010.
  55. M.H. Izadi, N. Safavian, K.S. Karim, O. Tousignant, M.F. Mokam, H. Mani, L. Laperriere, “Performance of a prototype amorphous silicon active pixel sensor array using a-Se for direct x-ray conversion,” in SPIE Medical Imaging 2010: Physics of Medical Imaging, San Diego, USA, Feb 2010.
  56. N. Allec, A. Goldan, K. Wang, F. Chen, K.S. Karim, “Amorphous silicon p-i-n photodetector with Frisch grid for high-speed medical imaging,” in SPIE Medical Imaging 2010: Physics of Medical Imaging, San Diego, USA, Feb 2010.
  57. K-W. Shin, K. Wang, A. Reznik, K.S. Karim, “Cadmium zinc telluride detector for low photon energy applications,” in SPIE Medical Imaging 2010: Physics of Medical Imaging, San Diego, USA, Feb 2010.
  58. N. Allec, K.S. Karim, “A balanced, filterless, K-edge energy window multilayer detector for dual energy computed tomography,” in SPIE Medical Imaging 2010: Physics of Medical Imaging, San Diego, USA, Feb 2010.
  59. M.M. Adachi, K. Wang, F. Chen, K.S. Karim, “Silicon nanowire metal-semiconductor-metal photodetectors,” in SPIE Medical Imaging 2010: Physics of Medical Imaging, San Diego, USA, Feb 2010.
  60. N. Safavian, K.S. Karim, J.A. Rowlands “Active Pixels for Large Area Direct Detection Medical X-ray Imaging,” in 2009 Radiological Society of North America Annual Symposium, Physics Session, November 2009.
  61. A. Goldan, K.S. Karim, “Frisch Grid for Large Area Direct Detection Medical X-ray Imaging,” in 2009 Radiological Society of North America Annual Symposium, Physics Session, November 2009.
  62. M.M. Adachi, D. Shiri, K.S. Karim, M.P. Anantram, "Modeling of silicon quantum dots for solar cell applications" in Proceedings of the 34th IEEE Photovoltaic Specialists Conference, USA, 2009.
  63. K. Wang, K.S. Karim, A. Reznik, “Fabrication and characterization of cerium oxide thin films for ultraviolet sensing applications,” in SPIE Optics and Photonics, San Diego, USA, August 2009.
  64. K. Wang, F. Chen, G. Belev, S. Kasap, K.S. Karim, “Design and modeling of a lateral a-Se MSM photoconductor as indirect conversion X-ray imager,” in SPIE Optics and Photonics, San Diego, USA, August 2009.
  65. A. Goldan, K.S. Karim, “Photon counting using amorphous selenium: Achieving hole dispersion limited count-rate using the Frisch grid detector design,” SPIE Optics and Photonics, August 2009.
  66. A. Goldan, Y. Fang, K.S. Karim, O. Tousignant, H. Mani, L. Laperriere, “Amorphous selenium direct X-ray radiation detectors utilizing a Frisch grid for diagnostic medical imaging applications,” in SPIE Medical Imaging 2009: Physics of Medical Imaging, Orlando, Florida, Feb 2009.
  67. A. Goldan, B. Hadji-Khamneh, K.S. Karim, O. Tousignant, H. Mani, L. Laperriere, “Counting and Integrating Photon Counting Circuit for medical imaging applications,” in SPIE Medical Imaging 2009: Physics of Medical Imaging, Orlando, Florida, Feb 2009.
  68. A. Sultana, N. Safavian, M.H. Izadi, D. Wu, K.S. Karim, “Characterization of bias induced metastability of amorphous silicon (a-Si:H) thin film transistor (TFT) based passive pixel sensor switch and its impact on biomedical X-ray imaging applications,” in SPIE Medical Imaging 2009: Physics of Medical Imaging, Orlando, Florida, Feb 2009.
  69. N. Safavian, M.H. Izadi, A. Sultana, D. Wu, K.S. Karim, “Current programmed pixel amplifier for digital medical imaging applications,” in SPIE Medical Imaging 2009: Physics of Medical Imaging, Orlando, Florida, Feb 2009.
  70. F. Taghibakhsh, K.S. Karim, G. Belev, S.O. Kasap, D.M. Hunter, V. Verpakhovski, J.G. Mainprize, M.J. Yaffe, “Evaluation of the X-Ray Response of Amorphous Selenium Coated 100 micron pixel pitch a-Si Active Pixel Sensors for Tomosynthesis Applications,” in SPIE Medical Imaging 2009: Physics of Medical Imaging, Orlando, Florida, Feb 2009.
  71. K.S. Karim, F. Taghibakhsh, M. Izadi, N. Safavian, D. Wu, “Current Mode Active Pixel Sensor Architectures for Large Area Digital Imaging,” IEEE International Conference on Microelectronics (ICM), Sharjah, UAE, December 2008.
  72. N. Safavian, K.S. Karim, A. Nathan, J.A. Rowlands, “A 3-TFT Hybrid Active-Passive Pixel with Correlated Double Sampling CMOS Readout Circuit for Real-Time Medical X-ray Imaging,” 34th European Solid-State Circuits Conference (ESSCIRC), 2008. 
  73. A. Goldan, K.S. Karim, “Unipolar Charge Sensing Using Frisch and Coplanar Grid Techniques for Amorphous Selenium Based Radiation Detectors,” SPIE Optics and Photonics 2008: Hard X-Ray, Gamma-Ray, and Neutron Detector Physics X, San Diego, CA, August 2008. 
  74. F. Taghibakhsh, K.S. Karim, “Light Controlled Oscillator: A Pixel Architecture for Large Area Digital Imaging using Amorphous Silicon,” IEEE Canadian Conference on Electrical and Computer Engineering, May 2008.
  75. A. Sultana, K.S. Karim, J.A. Rowlands, “Large Area Direct X-Ray Conversion Detector for Protein Crystallography,” IEEE Canadian Conference on Electrical and Computer Engineering, May 2008.
  76. A. Goldan, K.S. Karim, A. Reznik, C.B. Caldwell, J.A. Rowlands, “Photon Counting Readout Pixel Array in 0.18-μ m CMOS technology for On-line Gamma-ray Imaging of 103Palladium Seeds for Permanent Breast Seed Implant (PBSI) Brachytherapy,” in SPIE Medical Imaging 2008: Physics of Medical Imaging, San Diego, USA, Feb 2008.
  77. F. Taghibakhsh, K.S. Karim, “High Resolution Amplified Pixel Sensor Architectures for Large Area Digital Mammography Tomosynthesis,” in SPIE Medical Imaging 2008: Physics of Medical Imaging, San Diego, USA, Feb 2008. 
  78. S. Tsang, A.H. Ma, K.S. Karim, M. Parameswaran, A.M. Leung, “Monolithically Fabricated Polymer MEMS 3-AXIS Thermal Accelerometers designed for Automated Wirebonder Assembly,” IEEE 21st International Conference on MEMS, Tucson, USA, Jan 2008.
  79. F. Taghibakhsh, K.S. Karim, “Two-Transistor Active Pixel Sensor for High Resolution Large Area Digital X-ray Imaging,” in IEEE International Electron Devices Meeting (IEDM) Technical Digest, December 2007. 
  80. M.M. Adachi, K.S. Karim, “Thin Film Silicon Solar Cells prepared by Temperature Controlled Hot-wire Chemical Vapor Deposition,” in Proc. IEEE 5th World Conference on Photovoltaic Energy Conversion, Dec 2007. 
  81. M.H. Izadi, K.S. Karim, “Noise Optimization of an Active Pixel Sensor for Real-Time Digital X-ray Fluoroscopy,” Noise and Fluctuations in Circuits, Devices, and Materials, Eds. Massimo Macucci, Lode K.J. Vandamme, Carmine Ciofi, Michael B. Weissman, Proc. SPIE, Vol. 6600, May 2007. 
  82. F. Taghibakhsh, K.S. Karim, “Fabrication and Characterization of Nickel-Amorphous Silicon Metal-Semiconductor-Metal Photoconductors,” IEEE Canadian Conference on Electrical and Computer Engineering (CCECE) pp. 1664 - 1667, April 2007.
  83. W. F. L. Tse, I. Khodami, M. M. Adachi, X. Wang, K. Kavanagh, K.S. Karim, “Characterization of Low Temperature P-type Hydrogenated Microcrystalline Silicon Thin Films Deposited by Plasma Enhanced Chemical Vapor Deposition,” IEEE Canadian Conference on Electrical and Computer Engineering (CCECE) pp. 952 – 955, April 2007.
  84. A. Goldan, L. Ng, J.A. Rowlands, K.S. Karim, “Photon Counting Pixel Architecture for X-ray and Gamma-ray Imaging Applications,” in SPIE Medical Imaging 2007: Physics of Medical Imaging, San Diego, USA, Proc. SPIE 6510, Feb 2007. 
  85. F. Taghibakhsh, K.S. Karim, “Amplified Pixel Sensor Architectures for Low Dose Computed Tomography using Silicon Thin Film Technology,” in SPIE Medical Imaging 2007: Physics of Medical Imaging, San Diego, USA, Proc. SPIE 6510, Feb 2007. 
  86. F. Taghibakhsh, M.M. Adachi, K.S. Karim, “Hot-wire Deposited Nanocrystalline silicon TFTs on Plastic Substrates” Proceedings of the Materials Research Society Symposium, Vol. 989, A20-04, April 2006.
  87. M.M. Adachi, F. Taghibakhsh, K. Kavanagh, K.S. Karim, “Structural Analysis of Nanocrystalline Silicon Prepared by Hot-wire CVD on Polymer Substrates” Proceedings of the Materials Research Society Symposium, Vol. 989, A22-03, April 2006.
  88. A.H. Goldan, K.S. Karim, "Breast tomosynthesis with X-ray quantum counting systems," Proc. Of the 29th Canadian Medical and Biological Engineering Conference, Vancouver, BC, Jun 2006.
  89. S. Hou, K S. Karim, “Amorphous silicon radio frequency identification (RFID) tags for biomedical applications,” Proc. Of the 29th Canadian Medical and Biological Engineering Conference, Vancouver, BC, Jun 2006. 
  90. F. Taghibakhsh, K.S. Karim, “A study of the potential of silicon thin film technology in new applications of computed tomography,” Proc. Of the 29th Canadian Medical and Biological Engineering Conference, Vancouver, BC, Jun 2006. 
  91. G. Sanaie, F. Taghibakhsh, K.S. Karim, “Low noise, high dynamic range pixel architecture in amorphous silicon technology for diagnostic medical imaging applications,” Proc. Of the 29th Canadian Medical and Biological Engineering Conference, Vancouver, BC, Jun 2006.
  92. M.H. Izadi, D.T. Ressl, K.S. Karim, “Low-noise design and testing methodology for an a-Si flat-panel medical x-ray imager,” Proc. Of the 29th Canadian Medical and Biological Engineering Conference, Vancouver, BC, Jun 2006.
  93. I. Khodami, M.M. Adachi, K. Kavanagh, K S. Karim, “Wavelength selective amorphous silicon photodiodes for biomedical applications,” Proc. Of the 29th Canadian Medical and Biological Engineering Conference, Vancouver, BC, Jun 2006.
  94. W.F.L. Tse, M.M. Adachi, K.S. Karim, “Integrated Power Sources for Wearable Sensors,” Proc. Of the 29th Canadian Medical and Biological Engineering Conference, Vancouver, BC, Jun 2006.
  95. M.M. Adachi, W.F.L. Tse, K.S. Karim, "Low Temperature Microcrystalline Silicon Solar Cells using Hot-Wire Chemical Vapor Deposition," Proc. IEEE 4th World Conference on Photovoltaic Energy Conversion, Volume 2,  pp. 1632 – 1634, May 2006.
  96. F. Taghibakhsh, K.S. Karim, “Hot-wire CVD a-Si:H TFT on Plastic Substrates,” in Amorphous and Heterogeneous Silicon-based Films, Proceedings of the Materials Research Society Symposium, Vol. 910, A18-02, April 2006.
  97. M.M. Adachi, W.F.L. Tse, G. Cluff, K. Kavanagh, K.S. Karim, “Effects of HWCVD-deposited Seed Layers on Hydrogenated Microcrystalline Silicon Films on Glass Substrates,” in Amorphous and Heterogeneous Silicon-based Films, Proceedings of the Materials Research Society Symposium, Vol. 910, A08-05, April 2006. 
  98. M.L. La Haye, C. Jung, M.H. Izadi, G.H. Chapman, K.S. Karim, "Noise Analysis of Fault Tolerant Active Pixel Sensors with and without Defects," Proc. SPIE: Sensors, Cameras, and Systems for Scientific and Industrial Applications VII; Morley M. Blouke; Ed. Vol. 6068, pp. 26-36, Feb 2006.
  99. M.H. Izadi, K.S. Karim, A. Nathan, J.A. Rowlands, “Low-Noise Pixel Architectures for Advanced Diagnostic Medical X-ray Imaging Applications ,” Proc. SPIE,  Medical Imaging 2006: Physics of Medical Imaging, Michael J. Flynn, Jiang Hsieh; Eds., Vol. 6142, pp. 264-274, Feb 2006.
  100. A.H. Goldan, K.S. Karim, J.A. Rowlands, “Selective Photon Counter for Digital X-ray Mammography Tomosynthesis ,” Proc. SPIE, Medical Imaging 2006: Physics of Medical Imaging; Michael J. Flynn, Jiang Hsieh; Eds., Vol. 6142, pp. 1697-1705, Feb 2006.  
  101. I. Khodami, M.M. Adachi, M. Malhotra, F. Taghibakhsh, J.A. Rowlands, K. Kavanagh, K.S. Karim, “Light induced degradation in amorphous silicon photodiodes and implications for diagnostic medical imaging applications,” Proc. SPIE, Medical Imaging 2006: Physics of Medical Imaging; Michael J. Flynn, Jiang Hsieh; Eds. Vol. 6142, pp. 967-975, Feb 2006.
  102. C. Jung, M.H. Izadi, M.L. La Haye, G.H. Chapman, K.S. Karim, "Noise Analysis of Fault Tolerant Active Pixel Sensors," Proc. 20th IEEE International Symposium on Defect and Fault Tolerance in VLSI Systems, pp. 140-8, July 2005.
  103. A.H. Goldan, K.S. Karim, J.A. Rowlands, "Photon Counting Pixels in CMOS Technology for X-Ray Imaging Applications", Proceedings of the IEEE Canadian Conference on Electrical and Computer Engineering, pp. 370-373, May 2005.
  104. M.H. Izadi, K.S. Karim, "Noise analysis of a CMOS active pixel sensor for tomographic mammography," Proc. 5th IEEE Int. Workshop on System-on-Chip for Real-Time Applications, pp. 167-171, July 2005.
  105. G. Sanaie-Fard, K.S. Karim, "Pixel Amplifiers in Amorphous Silicon Technology for Dual Mode Diagnostic X-ray Imaging Applications" 106th Meeting of the Electrochemical Society: Thin Film Transistor Technologies VII (TFTT VII), PV 2004-15, pp. 289-300, Oct. 2004.
  106. T. Ottaviani, K.S. Karim, “A novel charge amplifier circuit for extending the dynamic range of amorphous silicon amplified pixels,” in IEEE Canadian Conference on Electrical and Computer Engineering (CCECE 2004), Niagara Falls, Ontario, vol. 3, pp. 1711-1714, May 2-5, 2004.
  107. M.H. Izadi, K.S. Karim, “Pixel architectures for digital X-ray imaging in crystalline silicon technology,” in IEEE Canadian Conference on Electrical and Computer Engineering (CCECE 2004), Niagara Falls, Ontario, vol. 3, pp. 1719-1722, May 2-5, 2004.
  108. K.S. Karim, S. Yin, A. Nathan, J.A. Rowlands, “High dynamic range pixel architectures for diagnostic medical imaging,” in Medical Imaging 2004: Physics of Medical Imaging, M. Yaffe, M. J. Flynn, Editors, SPIE, vol. 5368, pp. 657-667, February 2004. 
  109. A. Nathan, K. Sakariya, A. Kumar, P. Servati, K.S. Karim, D. Striakhilev, A.Sazonov, "Amorphous silicon TFT circuit integration for OLED displays on glass and plastic," Proceedings of the IEEE 2003 Custom Integrated Circuits Conference, pp. 215-222, September 2003.
  110. K.S. Karim, K. Sakariya, A. Nathan, “Threshold voltage performance of a-Si:H TFTs for analog applications,” in Amorphous and Heterogeneous Silicon-based Films, J.R. Abelson, J.B. Boyce, J.D. Cohen, H. Matsumura, J. Robertson, Editors, Proceedings of the 2003 Spring Materials Research Society Symposium, 762, pp. A20.4.1-6, May 2003.
  111. A. Nathan, D. Striakhilev, P. Servati, K. Sakariya, A. Kumar, K.S. Karim, A. Sazonov, “Low Temperature a-Si:H Pixel Circuits for Mechanically Flexible AMOLED Displays,” in Flexible Electronics – Materials and Device Technology, Norbert Fruehauf, Babu R. Chalamala, Bruce E. Gnade, Jin Jang, Editors, Proceedings of 2003 Spring Materials Research Society Symposium, 769, pp. H2.2.1-6, May 2003.
  112. K.S. Karim, Y. Vygranenko, A. Avila-Munoz, D. Striakhilev, A. Nathan, S. Germann, J.A. Rowlands, G. Belev, C. Koughia, R. Johanson, S.O. Kasap, “Active Pixel Image Sensor for Large Area Medical Imaging,” in Medical Imaging 2003: Physics of Medical Imaging, L. Antonuk, M. Yaffe, Editors, SPIE vol. 5030, Part 1, pp. 38-47, February 2003.
  113. K.S. Karim, A. Nathan, J.A. Rowlands, “Amorphous silicon pixel amplifier with VT compensation for low noise digital fluoroscopy,” in IEEE International Electron Devices Meeting (IEDM) Technical Digest, pp. 215-218, December 2002.
  114. A. Nathan, K. Sakariya, K.S. Karim, P. Servati, A. Kumar, D. Striakhilev, "a-Si:H back-plane electronics for medical imaging and OLED displays," Proc. ICSE 2002, IEEE International Conference on Semiconductor Electronics. Proceedings, pp. 15-21, December 2002.
  115. R. Jayakumar, K.S. Karim, S. Sivoththaman, A. Nathan, “Reactive Ion Etching and Via Opening in Low Permittivity Inter-level Dielectric Films for Pixelated TFT Arrays,” in Thin Film Transistor Technologies VI, Y. Kuo, Editor, The Electrochemical Society Proceedings, PV2002-23, pp. 224-231, October 2002.
  116. K.S. Karim, P. Servati, A. Nathan, “High Voltage Amorphous Silicon TFT for use in Large Area Applications,” in 6th International Seminar on Power Semiconductors, ISPS’02, Prague, Czech Republic, pp. 207-212, August 2002.
  117. K.S. Karim, A. Nathan, J.A. Rowlands, “Amorphous silicon active pixel sensor readout circuit architectures for medical imaging,” in Amorphous and Heterogeneous Silicon-based Films, J.R. Abelson, J.B. Boyce, J.D. Cohen, H. Matsumura, J. Robertson, Editors, 715, Proceedings of the 2002 Spring Materials Research Society Symposium, A4.2.1 - A4.2.6, June 2002.
  118. R. Jayakumar, K.S. Karim, S. Sivoththaman, A. Nathan, “Integration issues for polymeric dielectrics in large area electronics,” in Proceedings of the 23rd International Conference on Microelectronics (IEEE MIEL 2002), vol. 2, pp.543-546, May 2002.
  119. A. Nathan, P. Servati, K.S. Karim, “TFT Circuit Integration in a-Si:H Technology,” Proceedings of the 23rd International Conference on Microelectronics (IEEE MIEL 2002), vol. 1, pp.115-124, May 2002.
  120. K.S. Karim, A. Nathan, J.A. Rowlands, “Feasibility of current mediated amorphous silicon active pixel sensor readout circuits for large area diagnostic medical imaging,” in Opto-Canada: SPIE Regional Meeting on Optoelectronics, Photonics and Imaging, SPIE vol. TD01, pp. 358-360, May 2002.
  121. K.K. Moez, K.S. Karim, A. Nathan, “Amorphous Silicon TFT Pulse Bias Induced Metastability,” in Opto-Canada: SPIE Regional Meeting on Optoelectronics, Photonics and Imaging, SPIE vol. TD01, pp. 422-424, May 2002.
  122. N. Mohan, K.S. Karim, A. Nathan, “Stability issues in digital circuits in amorphous silicon technology”, IEEE Canadian Conference on Electrical and Computer Engineering 2001, Vol. 1, pp. 583-588, May 2001.
  123. K.S. Karim, P. Servati, N. Mohan, A. Nathan, J.A. Rowlands, “VHDL-AMS Modeling and Simulation of a Pas-sive Pixel Sensor in a-Si:H Technology for Medical Imaging”, in IEEE International Symposium on Circuits and Sys-tems 2001, Vol. 5, pp. 479-482, May 2001.
  124. K.S. Karim, A. Nathan, J.A. Rowlands, “Alternate Pixel Architectures for Large Area Medical Imaging”, in Medical Imaging 2001: Physics of Medical Imaging, L. Antonuk, M. Yaffe, Editors, SPIE vol. 4320, pp. 35-46, February 2001.
  125. K.S. Karim, A. Nathan, “Active Pixel TFT Array for Digital Imaging Applications in a-Si:H Technology”, in Thin Film Transistor Technologies V, Y. Kuo, Editor, The Electrochemical Society Proceedings vol. PV 2000-31, pp. 320-332, October 2000.