Patent ID: 7491990

Claim:
An integrated circuit device, comprising: a complementary metal oxide semiconductor (CMOS) image sensor, said CMOS image sensor comprising: a transfer gate electrode on a semiconductor substrate; a P-N junction photodiode within the semiconductor substrate, adjacent a first side of said transfer gate electrode; a floating diffusion region within the semiconductor substrate, adjacent a second side of said transfer gate electrode; an interlayer insulating layer extending on the semiconductor substrate and opposite said transfer gate electrode, said P-N junction photodiode and said floating diffusion region; an optical shielding layer of a first material on said interlayer insulating layer, said optical shielding layer having an opening therein extending opposite said P-N junction photodiode; and a hard mask layer comprising a second material, on said optical shielding layer; and a metal-insulating-metal (MIM) capacitor on said interlayer insulating layer, said MIM capacitor comprising an electrode formed of the first material and a capacitor dielectric layer of the second material.