Patent ID: 8728852

Claim:
A method of producing a solid-state imaging device; comprising the steps of: forming a first trench in a portion where a first isolation region is to be formed in a peripheral circuit section on a semiconductor substrate, and a second trench in a portion where a second isolation region is to be formed in a pixel section having a photoelectric conversion element on the semiconductor substrate, the second trench being shallower than the first trench; forming an insulator layer as a continuous layer that extends over a structure including the entirety of an interior surface of the first trench, from the first trench to the second trench, and the entirety of an interior surface of the second trench, and forming first and second isolation regions to have surface heights of the insulator layer that are equal to each other through polishing the insulator layer, wherein, the second isolation region comprises a buried portion comprising the insulator layer that is buried into the semiconductor substrate and a protruding portion that protrudes above the upper surface of the semiconductor substrate, and the protruding portion of the first isolation region is the same height as the protruding portion of the second isolation region.