Patent ID: 6037609
Filing Date: 2000-03-14
Classification: H01L

Abstract:
A robust imager comprising a guard ring for a pixel array;said guard ring being disposed so as to form a boundary region defining a perimeter around the pixel array, said guard ring having at least one corner and at least one guard ring contact pad abutting said perimeter,said guard ring further having first and second regions, each of said regions comprising a first tier gate electrode material contact region overlayed by a second tier source-drain electrode material contact region, said second tier source-drain contact region being overlayed by a third tier conductor comprising ITO;said third tier ITO conductor being separated from said first tier gate electrode material contact region by at least one dielectric layer, and said third tier ITO conductor in said second region being disposed in electrical contact with said second tier source-drain electrode material contact region, andsaid third tier ITO conductor in said first region being electrically coupled to at least one of said guard ring contact pads.