Patent ID: 7749800
Filing Date: 2010-07-06
Classification: H01L

Abstract:
1. A method of manufacturing a photoelectric conversion device, comprising: forming a photoelectric conversion region of a second conductivity type opposite to a first conductivity type in a semiconductor substrate of the first conductivity type; forming a silicon nitride film only in an active element forming region; forming a first conductivity type shield layer close to a surface of the second conductivity type photoelectric conversion region located under an oxide film; forming a buried layer of the first conductivity type in an inner portion of the semiconductor substrate to cover a lower side of the photoelectric conversion region, the buried layer having a higher impurity concentration than the semiconductor substrate: forming a field oxide film and then removing the silicon nitride film and a portion of the oxide film which is located under the silicon nitride film; forming a gate oxide film in the active element forming region; forming a gate electrode on a portion of the gate oxide film; and forming a first conductivity type diffusion layer and a second conductivity type diffusion layer in the active element forming region.