Total ionizing dose effects in pinned photodiode complementary metal-oxide-semiconductor transistor active pixel sensor
Lin-Dong Ma(马林东)1,2,3, Yu-Dong Li(李豫东)1,2, Lin Wen(文林)1,2, Jie Feng(冯婕)1,2, Xiang Zhang(张翔)1,2,3, Tian-Hui Wang(王田珲)1,2,3, Yu-Long Cai(蔡毓龙)1,2,3, Zhi-Ming Wang(王志铭)1,2,3, Qi Guo(郭旗)1,2
1 Key Laboratory of Functional Materials and Devices for Special Environments of Chinese Academy of Sciences, Xinjiang Technical Institute of Physics & Chemistry, Urumqi 830011, China;
2 Xinjiang Key Laboratory of Electronic Information Material and Device, Urumqi 830011, China;
3 University of Chinese Academy of Sciences, Beijing 100049, China
A pinned photodiode complementary metal-oxide-semiconductor transistor (CMOS) active pixel sensor is exposed to 60Co to evaluate the performance for space applications. The sample is irradiated with a dose rate of 50 rad (SiO2)/s and a total dose of 100 krad (SiO2), and the photodiode is kept unbiased. The degradation of dark current, full well capacity, and quantum efficiency induced by the total ionizing dose damage effect are investigated. It is found that the dark current increases mainly from the shallow trench isolation (STI) surrounding the pinned photodiode. Further results suggests that the decreasing of full well capacity due to the increase in the density, is induced by the total ionizing dose (TID) effect, of the trap interface, which also leads to the degradation of quantum efficiency at shorter wavelengths.
Project supported by the National Natural Science Foundation of China (Grant No. 11675259) and the West Light Foundation of the Chinese Academy of Sciences (Grant Nos. 2016-QNXZ-B-8 and 2016-QNXZ-B-2).
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
