Patent ID: 7078753
Filing Date: 2006-07-18
Classification: H01L

Abstract:
1. An image sensor comprising: a plurality of photoelectric conversion portions each of which photoelectrically converts an object image formed by a photographing lens; a high refractive index portion which is placed on each of said plurality of photoelectric conversion portions to cover at least part of said photoelectric conversion portion, and includes a first portion positioned near said photoelectric conversion portion and formed into a shape of a square pillar or column having a substantially uniform thickness, and a second portion formed contiguously with said first portion and having a taper shape whose aperture area increases from a side close to said photoelectric conversion portion to a side close to said photographing lens; and a low refractive index portion placed around said high refractive index portion, and having a refractive index lower than that of said high refractive index portion, wherein letting x where θ′=θ0′+2θ and sin θ0′=½n 1 F+R/n 1 f.