Mapping electrical crosstalk in pixelated sensor arrays

S. Seshadri; D. M Cole; B. R. Hancock; R. M. Smith

doi:10.1117/12.790150

22 July 2008 Mapping electrical crosstalk in pixelated sensor arrays

S. Seshadri, D. M Cole, B. R. Hancock, R. M. Smith

Proceedings Volume 7021, High Energy, Optical, and Infrared Detectors for Astronomy III; 702104 (2008) https://doi.org/10.1117/12.790150
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

Electronic coupling effects such as Inter-Pixel Capacitance (IPC) affect the quantitative interpretation of image data from CMOS, hybrid visible and infrared imagers alike. Existing methods of characterizing IPC do not provide a map of the spatial variation of IPC over all pixels. We demonstrate a deterministic method that provides a direct quantitative map of the crosstalk across an imager. The approach requires only the ability to reset single pixels to an arbitrary voltage, different from the rest of the imager. No illumination source is required. Mapping IPC independently for each pixel is also made practical by the greater S/N ratio achievable for an electrical stimulus than for an optical stimulus, which is subject to both Poisson statistics and diffusion effects of photo-generated charge. The data we present illustrates a more complex picture of IPC in Teledyne HgCdTe and HyViSi focal plane arrays than is presently understood, including the presence of a newly discovered, long range IPC in the HyViSi FPA that extends tens of pixels in distance, likely stemming from extended field effects in the fully depleted substrate. The sensitivity of the measurement approach has been shown to be good enough to distinguish spatial structure in IPC of the order of 0.1%.

Citation Download Citation

S. Seshadri, D. M Cole, B. R. Hancock, and R. M. Smith "Mapping electrical crosstalk in pixelated sensor arrays", Proc. SPIE 7021, High Energy, Optical, and Infrared Detectors for Astronomy III, 702104 (22 July 2008); https://doi.org/10.1117/12.790150

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available