Title : Brillnics 4um Voltage Domain GS Pixel
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Brillnics 4um Voltage Domain GS Pixel
MDPI paper "A Stacked Back Side-Illuminated Voltage Domain Global Shutter CMOS Image Sensor with a 4.0 μm Multiple Gain Readout Pixel" by Ken Miyauchi, Kazuya Mori, Toshinori Otaka, Toshiyuki Isozaki, Naoto Yasuda, Alex Tsai, Yusuke Sawai, Hideki Owada, Isao Takayanagi, and Junichi Nakamura from Brillnics is a part of the Special issue on the 2019 International Image Sensor Workshop (IISW2019)."A backside-illuminated complementary metal-oxide-semiconductor (CMOS) image sensor with 4.0 μm voltage domain global shutter (GS) pixels has been fabricated in a 45 nm/65 nm stacked CMOS process as a proof-of-concept vehicle. The pixel components for the photon-to-voltage conversion are formed on the top substrate (the first layer). Each voltage signal from the first layer pixel is stored in the sample-and-hold capacitors on the bottom substrate (the second layer) via micro-bump interconnection to achieve a voltage domain GS function. The two sets of voltage domain storage capacitor per pixel enable a multiple gain readout to realize single exposure high dynamic range (SEHDR) in the GS operation. As a result, an 80dB SEHDR GS operation without rolling shutter distortions and motion artifacts has been achieved. Additionally, less than −140dB parasitic light sensitivity, small noise floor, high sensitivity and good angular response have been achieved."
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