Patent ID: 7935560

Claim:
A method of forming a CMOS image sensor pixel cell comprising: providing a substrate; forming at least two photosensing devices in two adjacent pixels at or below a substrate surface for collecting charge carriers in response to light incident thereto; and forming a single light transmissive conductive wire structure comprised of a polysilicon material in optical paths above said at least two photosensing devices in said two adjacent pixels, wherein forming the single light transmissive conductive wire structure comprises forming a dielectric material structure above said photosensing devices that defines optical paths for said two adjacent pixels, etching said dielectric material structure to one or more depths in alignment with a particular pixel cell, forming a single layer of polysilicon material above said etched dielectric material structure in said optical path, and planarizing a top surface of said formed polysilicon material layer above said two adjacent pixels, wherein said etching is conducted in a manner that results in formation of said polysilicon material layer having a first thickness formed over a first pixel cell, and a second thickness formed over a second pixel cell, wherein said single light transmissive conductive wire structure provides both an electrical function and an optical function, wherein said single light transmissive conductive wire structure is tuned in thickness to filter light according to a color pixel scheme.