Patent ID: 9269734
Filing Date: 2016-02-23
CPC Classification: H01L

Claim Text:
1. A method of manufacturing a solid-state imaging device, comprising: forming a plurality of photoelectric conversion elements by two-dimensionally arranging semiconductor areas of a second conductivity type at a semiconductor layer of a first conductivity type in a matrix pattern; forming the photoelectric conversion elements in a rectangular shape in plan view by isotropic dry etching, the photoelectric conversion elements being formed by forming a grid-like trench in plan view so as to partition the semiconductor layer; forming, by anisotropic wet etching using an alkaline medicinal solution, the photoelectric conversion element formed into the rectangular shape in plan view into a convex polygonal shape in plan view whose number of corners is larger than the number of corners of a rectangular; and forming an element isolation area including a light shielding member at a trench coated with an insulating film after coating an inner peripheral surface of the trench with the insulating film; wherein the polygonal convex shape in plan view is an octagon shape in plan view.