Patent ID: 9425228
Filing Date: 2016-08-23
CPC Classification: H01L

Claim Text:
1. An image sensor, comprising: a photodiode array overlapping a substrate; a first oxide layer overlapping the photodiode array; a metal grid comprising a first metal grid structure and a second metal grid structure in contact with a top surface of the first oxide layer; an oxide grid comprising a first oxide grid structure in contact with a top surface of the first metal grid structure and a second oxide grid structure in contact with a top surface of the second metal grid structure; a filler grid comprising a first filler grid structure overlapping the first oxide layer and between the first metal grid structure and the second metal grid structure; and a capping layer in contact with the top surface of the first oxide layer, wherein there is no metal between a top surface of the first oxide grid structure and a lens structure overlapping the first oxide grid structure.