Patent ID: 9741760
Date: 2017-08-22
CPC Classifications: H01L,H04N

Claim:
1. An imaging device, comprising: a semiconductor substrate having a first side as a light-receiving side, and a second side opposite to the first side; a plurality of photoelectric conversion regions in the semiconductor substrate, the plurality of the photoelectric conversion regions comprising a first photoelectric conversion region, a second photoelectric conversion region and a third photoelectric conversion region; a plurality of element isolation regions comprising a first element isolation region provided between the first photoelectric conversion region and the second photo electric conversion region, and a second element isolation region provided between the second photoelectric conversion region and the third photoelectric conversion region; and a multilayer wiring layer disposed at the second side of the semiconductor substrate, wherein the first element isolation region and the second element isolation region each comprise a p-type semiconductor layer, wherein the first element isolation region comprises a first trench and the second element isolation region comprises a second trench, the first and second trenches each having an opening at the first side of the semiconductor substrate, and wherein an insulating film is extended continuously on the first side of the semiconductor substrate from an inside of the first trench to an inside of the second trench.