Patent ID: 7633106

Claim:
A pixel sensor cell comprising: a device region formed on a substrate, wherein the device region comprises a floating diffusion; a first layer of an opaque material forming a sidewall adjacent to a side of the device region for blocking electromagnetic radiation from the device region, wherein the first layer of material is formed over a transfer gate of the pixel sensor cell, wherein the first layer of material does not extend over the device region and is substantially perpendicular to a surface of the substrate; a second layer of material for blocking electromagnetic radiation from the device region, the second layer of material being in direct contact with the first layer of material and formed over the device region and the first layer of material, and oriented substantially perpendicular to a surface of the first layer of material; and a third layer of material for blocking electromagnetic radiation from the device region, the third layer of material formed of the same opaque material as the first layer, the third layer in direct contact with the second layer of material and oriented substantially parallel with the surface of the first layer of material, wherein the third layer of material is formed directly over a reset gate of the pixel sensor cell and does not extend over the device region.