4.6 A 1/2.3inch 20Mpixel 3-layer stacked CMOS Image Sensor with DRAM. - Tsutomu Haruta; Tsutomu Nakajima; Jun Hashizume; Taku Umebayashi; Hiroshi Takahashi; Kazuo Taniguchi; Masami Kuroda; Hiroshi Sumihiro; Koji Enoki; Takatsugu Yamasaki; Katsuya Ikezawa; Atsushi Kitahara; et al. (ISSCC, 2017)

A back-illuminated 6 μm SPAD depth sensor with PDE 36.5% at 940 nm via combination of dual diffraction structure and 2×2 on-chip lens. - Yutaro Fujisaki; Hidenobu Tsugawa; K. Sakai; H. Kumagai; R. Nakamura; Tomoharu Ogita; S. Endo; T. Iwase; H. Takase; K. Yokochi; S. Yoshida; S. Shimada; et al. (VLSI Technology and Circuits, 2023)