Patent ID: 8728853
Filing Date: 2014-05-20
Classification: H01L

Abstract:
1. A method of manufacturing a solid-state image sensing device including a plurality of photoelectric conversion portions constituting a plurality of pixels, an insulating gate field effect transistor portion, and a plurality of first films formed on said plurality of photoelectric conversion portions respectively, the method comprising the steps of: forming a stack film constituted of a plurality of insulating films so as to cover said plurality of photoelectric conversion portions and a gate electrode layer of said insulating gate field effect transistor portion; selectively anisotropically etching said stack film such that said stack film remains on each of said plurality of photoelectric conversion portions to form a lower film and such that said stack film remains on a sidewall of said gate electrode layer to form a sidewall insulating film; forming a source/drain region of said insulating gate field effect transistor portion by introducing an impurity into a region not covered with said gate electrode layer and said sidewall insulating film; forming an upper film at least on said lower film after introduction of said impurity; and etching at least any of said upper film and said lower film such that said first films on at least two photoelectric conversion portions of said plurality of photoelectric conversion portions are different in thickness from each other, wherein said step of etching at least any of said upper film and said lower film includes the step of etching said lower film after said sidewall insulating film is formed and before said upper film is formed.