Patent ID: 7312098
Filing Date: 2007-12-25
Classification: H01L

Abstract:
1. A method of manufacturing a CMOS image sensor, comprising the steps of: forming a LOCOS isolation film over a surface of a semiconductor substrate containing a peripheral circuit and a photodiode region; forming a gate electrode on a surface of the peripheral circuit; depositing a sidewall-forming film, all over the surface of the semiconductor substrate; and forming a sidewall of the gate electrode, wherein the step of forming the sidewall of the gate electrode comprises the steps of: performing blanket E/B over the sidewall-forming film in a halfway-stopping etching therein forming the surface-protecting film; applying a photoresist over the surface-protecting film while lithographically processing the photoresist therein patterning the photoresist such that the photoresist exposes the peripheral circuit and covers at least a portion of the photodiode region; and E/B-processing the surface-protecting film therein forming the sidewall of the gate electrode.