Patent ID: 7514284

Claim:
A method of forming an image sensor, comprising: forming a device isolation layer in a first conduction type semiconductor substrate to define a diode region and an active region; forming a second conduction type photodiode at a predetermined depth from a surface of the diode region, and a first conduction type photodiode disposed between the surface of the diode region and the second conduction type photodiode; forming a first gate on the active region adjacent to the diode region; and forming a blocking pattern and spacer insulation pattern that are stacked on the diode region; disposing at least one sidewall spacer on one sidewall of the first gate, wherein the at least one sidewall spacer includes a first spacer and a second spacer disposed on the first spacer; forming a floating diffusion layer in the active region adjacent to the first gate; forming a silicide preventing pattern covering the blocking pattern, a top surface of the first gate and the floating diffusion layer; and forming a metal layer on the semiconductor substrate including the silicide preventing pattern covering the blocking pattern, the top surface of the first gate and the floating diffusion layer.