Patent ID: 9564399
Date: 2017-02-07
CPC Classifications: H01L

Claim:
1. A method for manufacturing a solid state image sensor, the method comprising: forming an electrically conductive layer and an interlayer insulation film above a semiconductor substrate, the semiconductor substrate having a first region and a second region, photoelectric conversion elements being arranged in the first region and the second region; performing an annealing process after forming the conductive layer and the interlayer insulation film; and forming a protective film above the interlayer insulation film and the electrically conductive layer, wherein the electrically conductive layer includes a light shielding layer arranged above the second region, wherein the interlayer insulation film includes a first portion that is located above the first region and a second portion that is located above the second region and below the light shielding layer, and wherein, before performing the annealing process, the second portion of the interlayer insulation film has an average hydrogen concentration that is higher than an average hydrogen concentration of the first portion of the interlayer insulation film.