Patent ID: 8217481
Filing Date: 2012-07-10
Classification: H01L

Abstract:
1. A solid-state image capturing device comprising: a photoelectrical conversion section formed in a semiconductor substrate or in a substrate area provided on a substrate; a first transparent film provided above the photoelectrical conversion section; and a lens provided at a position above the first transparent film corresponding to the photoelectrical conversion section, wherein the lens is formed by using a second transparent film layered by changing a refractive index successively or incrementally, a top surface of the second transparent film is formed in an upwardly convex shape in an area above the photoelectrical conversion section, a bottom surface of the second transparent film is formed in a downwardly convex shape, and the lens is formed continuously with a plurality of layers, and wherein a top layer of the plurality of layers includes the upwardly convex top surface, the top layer of the plurality of layers does not extend across an entire layer underneath the top layer, and the entire layer underneath the top layer is a layer of the plurality of layers and is adjacent to the top layer, wherein the second transparent film is formed by controlling a chemical composition like silicon oxide, silicon oxynitride and silicon nitride to change a refractive index inside the film successively or incrementally.