Patent ID: 9564467
Date: 2017-02-07
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; a plurality of element isolation regions comprising a first element isolation region and a second element isolation region each provided between adjacent photoelectric conversion regions of the plurality of photoelectric conversion regions; 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 disposed continuously on the first side of the semiconductor substrate from an inside of the first trench to an inside of the second trench.