Patent ID: 7659135
Filing Date: 2010-02-09
Classification: H01L

Abstract:
1. A method for fabricating a semiconductor device with a built-in light receiving element and a MOS transistor, the method comprising: forming an isolation section which defines a first element area in which a plurality of light receiving elements are formed and a second element area which the MOS transistor is formed; forming a division section for dividing the plurality of light receiving elements in the first element area; forming an antireflection coating on a light receiving area formed in a part of a divided element area of the element area, on the division section around the light receiving area, and on the division section around an area outside the light receiving area of the divided element area; and forming a protection layer for protecting the antireflection coating on the antireflection coating formed on the light receiving area, on the division section around the light receiving area, and on the division section around the area outside the light receiving area and a gate electrode area in the second area; forming an insulating layer above the first area and the second area; and etching the insulating layer to form a sidewall in the gate electrode area while protecting the antireflection coating with the protection layer on the antireflection coating formed on the light receiving area, on the division section around the light receiving area, and on the division section around the area outside the light receiving area.