Patent ID: 6362019
Filing Date: 2002-03-26
Classification: H01L

Abstract:
A method for manufacturing a solid-state imaging device comprising a plurality of pixels, each pixel comprising:a semiconductor substrate of a first conductivity type; a photo-receiving portion of a second conductivity type formed in the semiconductor substrate; a first diffusion region of the second conductivity type formed in the semiconductor substrate; a first insulating film formed on the semiconductor substrate; a gate electrode formed on the first insulating film at least between the photo-receiving portion and the first diffusion region; a read-out circuit, which is electrically connected to either one of the photo-receiving portion and the first diffusion region; the method comprising:forming the gate electrode on the first insulating film; implanting ions into the semiconductor substrate using the gate electrode as a mask and forming the photo-receiving portion and a second diffusion region of the second conductivity type including a region that corresponds to the first diffusion region; forming a second insulating film directly on the gate electrode above the semiconductor substrate; etching the second insulating film in a manner that the second insulating film remains above the photo-receiving portion and above a region of the substrate including an end of the second diffusion region near the gate electrode; and implanting ions that are impurities of the second conductivity type into the second diffusion region using the remaining second insulating film as a mask to form the first diffusion region.