Patent ID: 9356060
Filing Date: 2016-05-31
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a pixel comprising a substrate and a photodiode within the substrate, the substrate having a first side and a second side opposite the first side, the photodiode below a portion of the substrate and sharing an interface with the first side of the substrate, wherein the substrate comprises a semiconductor material throughout the substrate; a first optical block layer above the second side of the substrate, wherein the first optical block layer comprises aluminum copper; a second optical block layer over the first optical block layer, the second optical block layer being separated from the first optical block layer; a first glue layer between the first optical block layer and the second optical block layer, wherein the first glue layer comprises titanium nitride; and an opening through the first optical block layer and the second optical block layer to allow light to impinge upon the photodiode.