US 12,113,089 B2
Light receiving element and distance measuring device
Daisuke Washio, Kumamoto (JP); Masahiko Tsujita, Kumamoto (JP); and Hidenori Maeda, Kumamoto (JP)
Assigned to Sony Semiconductor Solutions Corporation, Kanagawa (JP)
Appl. No. 17/773,154
Filed by SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
PCT Filed Apr. 6, 2020, PCT No. PCT/JP2020/015477
§ 371(c)(1), (2) Date Apr. 29, 2022,
PCT Pub. No. WO2021/090521, PCT Pub. Date May 14, 2021.
Claims priority of application No. 2019-201655 (JP), filed on Nov. 6, 2019.
Prior Publication US 2022/0399390 A1, Dec. 15, 2022
Int. Cl. H01L 27/146 (2006.01)
CPC H01L 27/14636 (2013.01) [H01L 27/14609 (2013.01); H01L 27/14623 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A light receiving element, comprising:
a pixel region in which a plurality of pixels is arranged, the plurality of pixels including a photodiode formed on a semiconductor substrate in which a charge generated by photoelectric conversion of incident light is multiplied with a high reverse bias voltage, an on-chip lens that focuses the incident light on the photodiode, and a wiring region having a wiring layer connected to the photodiode and an insulating layer that insulates the wiring layer; and
an adjacent pixel arranged adjacent to the pixel region and including a photodiode, and a semiconductor region light-blocking wall formed on the semiconductor substrate at a boundary between the pixel region and the adjacent pixel and blocking the incident light.