Paper
13 October 2010 Evaluation of 10MeV proton irradiation on 5.5 Mpixel scientific CMOS image sensor
Paul Vu, Boyd Fowler, Brian Rodricks, Janusz Balicki, Steve . Mims, Wang Li
Author Affiliations +
Abstract
We evaluate the effects of 10 MeV proton irradiation on the performance of a 5.5 Mpixel scientific grade CMOS image sensor based on a 5T pixel architecture with pinned photodiode and transfer gate. The sensor has on-chip dual column level amplifiers and 11-bit single slope analog to digital converters (ADC) for high speed readout and wide dynamic range. The operation of the sensor is programmable and controlled by on-chip digital control modules. Since the image sensor features two identical halves capable of operating independently, we used a mask to expose only one half of the sensor to the proton beam, leaving the other half intact to serve as a reference. In addition, the pixel array and the digital logic control section were irradiated separately, at dose rates varying from 4 rad/s to 367 rad/s, for a total accumulated dose of 146 krad(Si) to assess the radiation effects on these key components of the image sensor. We report the resulting damage effects on the performance of the sensor including increase in dark current, temporal noise, dark spikes, transient effects and latch-up. The dark signal increased by about 55 e-/pixel after exposure to 14 krad (Si) and the dark noise increased from about 2.75e- to 6.5e-. While the number of hot pixels increased by 6 percent and the dark signal non uniformity degraded, no catastrophic failure mechanisms were observed during the tests, and the sensor did not suffer from functional failures.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Paul Vu, Boyd Fowler, Brian Rodricks, Janusz Balicki, Steve . Mims, and Wang Li "Evaluation of 10MeV proton irradiation on 5.5 Mpixel scientific CMOS image sensor", Proc. SPIE 7826, Sensors, Systems, and Next-Generation Satellites XIV, 78261R (13 October 2010); https://doi.org/10.1117/12.868160
Lens.org Logo
CITATIONS
Cited by 4 scholarly publications and 3 patents.
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Sensors

Image sensors

CMOS sensors

Amplifiers

Control systems

Digital electronics

Photodiodes

Back to Top