Patent ID: 7651903

Claim:
A method for manufacturing a CMOS image sensor including a photodiode and a plurality of transistors, the method comprising the steps of: forming an isolation layer in an isolation area of a semiconductor substrate having an active area and the isolation area; forming a gate insulating layer and a gate electrode in the active area; forming a photodiode in a predetermined part of the active area of the semiconductor substrate; forming an insulating sidewall spacer on sides of the gate electrode; depositing a metal layer on an entire surface of the semiconductor substrate including the gate electrode and the insulating sidewall spacer; forming a metal silicide layer on the gate electrode and an interfacial area of the photodiode by annealing the metal layer and the semiconductor substrate; selectively etching the metal layer except for a predetermined portion of the metal layer that electrically connects the gate electrode to a part of the interfacial area of the photodiode; and forming a dielectric layer on an entire surface of the semiconductor substrate including the metal layer and the metal silicide layer.