A 1/4-inch 8Mpixel Back-Illuminated Stacked CMOS Image Sensor

Abstract

To realize a small chip size image sensor with the additional functions, we developed a stacked CMOS image sensor (CIS), which is composed of conventional back illuminated (BI) CMOS image sensor process technology and standard logic process technology. We have achieved 30% reduction in the chip size compared to the same optical size conventional BI-CIS regardless of addition function, also 24dB above the conventional dynamic range is obtained with a unique signal processing technology in high dynamic range (HDR) mode.