Patent ID: 7935988

Claim:
A method of manufacturing a solid state imaging device comprising a photo-electric conversion portion array including a plurality of photo-electric conversion parts and a transfer electrode array including a plurality of transfer electrodes, said photo-electric conversion portion array and said transfer electrode array being provided in parallel to each other, upper surfaces and side wall surfaces of said transfer electrode array being covered with a light-shielding layer, and a transparent layer showing an oxidizing property at the time of film formation, said transparent layer being formed on said photo-electric conversion parts and said light-shielding layer, wherein the process of forming said light-shielding layer comprises the steps of forming a light-shielding layer material layer on a semiconductor substrate provided with said photo-electric conversion portion array and said transfer electrode array; forming a hard mask material layer on said light-shielding layer material layer; forming a photoresist material layer on said hard mask material layer; patterning said photoresist material layer so as to provide said photoresist material layer with openings corresponding to said photo-electric conversion parts, thereby forming a photoresist mask, in such a manner that edge portions of said openings formed in said photoresist material layer are aligned with said hard mask material layer covering said light-shielding layer material layer at said side wall surfaces of said transfer electrode array; subjecting said hard mask material layer to anisotropic etching by use of said photoresist mask as an etching mask so as to form a hard mask; and subjecting said light-shielding material layer to anisotropic etching by use of said hard mask as an etching mask so as to provide said light-shielding layer material layer with said openings corresponding to said photo-electric conversion parts.