Patent ID: 9698190
Date: 2017-07-04
CPC Classifications: H01L

Claim:
1. A method comprising: forming a first insulating layer over a backside of a substrate, the substrate comprising a photo diode, an interconnect structure being on a front side of the substrate; forming a recess in the first insulating layer, the recess being aligned above the photo diode; forming a reflective guide layer over the first insulating layer and in the recess; removing portions of the reflective guide layer in bottom portions of the recess; forming a color filter in the recess, a portion of the first insulating layer being between the color filter and an adjacent color filter; planarizing the reflective guide layer and the color filter such that an uppermost surface of the reflective guide layer is level with an uppermost surface of the color filter; and forming a lens over the color filter such that the color filter is interposed directly between the lens and the substrate.