Patent ID: 8809094
Filing Date: 2014-08-19
Classification: H01L

Abstract:
1. A method of manufacturing a solid-state image sensor, comprising: preparing a semiconductor substrate including a photoelectric converter and an insulating film which includes an opening and is formed in a region above the photoelectric converter; depositing a first material made of silicon nitride or silicon oxynitride and having a refractive index higher than the insulating film in the opening such that the material is in contact with the insulating film; irradiating a surface of the first material deposited in the opening with ultraviolet light or an electron beam so as to reduce a heat stress of the first material; depositing a second material made of silicon nitride or silicon oxynitride and having a refractive index higher than the insulating film on the surface of the first material that was irradiated and in the opening; and irradiating a surface of the second material that was deposited with ultraviolet light or an electron beam so as to reduce a heat stress of the second material, wherein a light waveguide which is configured to guide an incident light to the photoelectric converter is formed through the depositing of the first material, the irradiating, and the depositing of the second material.