Patent ID: 7601580

Claim:
A method of fabricating an image sensor comprising: forming a polysilicon layer on a semiconductor substrate having a pixel array region and a logic region; forming a first capping layer on the polysilicon layer, the first capping layer including at least one of a metal layer and a metal silicide layer; forming a dielectric layer on the first capping layer; forming an upper electrode layer on the dielectric layer; patterning the upper electrode layer, the dielectric layer and the first capping layer to form an upper electrode, a dielectric film and a first capping film stacked on a first portion of the polysilicon layer within the logic region of the semiconductor substrate and to expose a second portion of the polysilicon layer within the pixel array region and the logic region of the semiconductor substrate; and patterning the second portion of the polysilicon layer to form a first gate electrode in the pixel array region of the semiconductor substrate and a lower electrode interposed between the first capping film and the logic region of the semiconductor substrate.