Patent ID: 8097486
Filing Date: 2012-01-17
Classification: H01L

Abstract:
1. A method for producing a solid-state imaging element having a silicided region including a transistor in which surfaces of a source/drain region and a gate electrode of the transistor are at least silicided; and a non-silicided region including a transistor in which surfaces of the source/drain region and the gate electrode of the transistor are not silicided, the method comprising the steps of: forming a gate electrode on a semiconductor layer in each region; forming an insulating film to cover the semiconductor layer and each gate electrode, the step of forming the insulating film to cover each gate electrode comprises the step of forming a silicon oxide film to cover each gate electrode and forming a silicon nitride film on the silicon oxide film; etching the insulating film to form a sidewall on a side surface of the gate electrode; forming each source/drain region in the semiconductor layer using each gate electrode and each sidewall as masks; forming a hydrogen supply film to cover the gate electrodes, the sidewalls, the source/drain regions, and a light receiving region formed in the semiconductor layer to generate charges by light irradiation; forming a salicide block film on the hydrogen supply film; removing the hydrogen supply film and the salicide block film except for the non-silicided region; and forming a metal silicide film by forming a metal film on a substrate and then thermally treating the metal film to silicide an upper part of the gate electrode and an upper part of the source/drain region in the silicided region based on reaction of the metal film with silicon.