Patent ID: 9704898
Date: 2017-07-11
CPC Classifications: G01N,H01L

Claim:
1. An integrated bio-sensor with a nanocavity, comprising: a substrate, wherein a plurality of isolation structures are disposed on the substrate, and a plurality of pixel regions are defined by the isolation structures; a light-sensing region disposed in each of the pixel regions; a first dielectric layer disposed on the substrate; a trenched recess structure disposed in the first dielectric layer and corresponding to the light-sensing region; a liner layer disposed conformally on an inner wall of the trenched recess structure; a light filter layer disposed on the liner layer in the trenched recess structure; a cap layer disposed on the trenched recess structure and directly contacting a top surface of the light filter layer; a first passivation layer disposed on the cap layer; a nanocavity construction layer disposed on the first passivation layer, wherein a nanocavity is disposed in the nanocavity construction layer disposed directly above the light filter layer; and a second passivation layer disposed on a sidewall and a bottom surface of the nanocavity.