Patent ID: 6380568
Filing Date: 2002-04-30
Classification: H01L

Abstract:
A CMOS image sensor containing a plurality of unit pixels, each unit pixel having a light sensing region and a peripheral circuit region, comprising:a semiconductor substrate of a first conductive type; a transistor formed on the peripheral circuit region of the semiconductor substrate, wherein the transistor has a gate oxide layer and a gate electrode formed on the gate oxide layer; spacers formed on sidewalls of the gate oxide layer and the gate electrode, wherein one spacer is formed on the light sensing region; a first doping region of a second conductive type formed on the light sensing region, wherein the first doping region is extended to an edge of the gate electrode; and a second doping region of the first conductive type formed on the first doping region, wherein the second doping region is extended to an edge of a spacer formed on the light sensing region.