Patent ID: 9337225
Filing Date: 2016-05-10
CPC Classification: H01L

Claim Text:
1. A backside illumination (BSI) semiconductor image sensing device, comprising: a semiconductor substrate including an image sensing pixel region and an adjacent peripheral region, wherein the peripheral region is proximal to a sidewall of the backside illumination semiconductor image sensing device; a first anti reflective coating (ARC) on a backside of the semiconductor substrate; a dielectric layer on the first anti reflective coating; a radiation shielding layer on the dielectric layer in the peripheral region; and a photon blocking layer on the sidewall of the backside illumination semiconductor image sensing device and covering a portion of a sidewall of the radiation shielding layer while contacting with the sidewall of the radiation shielding layer, the sidewall of the radiation shielding layer not abutting the dielectric layer and forming a corner with the dielectric layer, and the photon blocking layer being configured to block photons penetrating into the semiconductor substrate; wherein an end of the photon blocking layer includes an arc.