Patent ID: 7605354
Filing Date: 2009-10-20
Classification: G02B,H01L

Abstract:
1. A color sensor comprising: a plurality of color filters, provided side by side, transmitting incident light; and light receiving elements, respectively corresponding to the color filters, each converting the incident light into an electrical signal, the color sensor further comprising: an interference filter, provided directly above the light receiving elements, transmitting light having a predetermined wavelength of the incident light; and the color filters being provided directly on the interference filter, the light receiving elements being a plurality of photodiodes each formed by (i) producing a first conductive silicon epitaxial wafer by forming an epitaxial layer with a use of an epitaxial growth and (ii) forming a second conductive layer from a surface of the epitaxial layer of the silicon epitaxial wafer into the epitaxial layer, the second conductive layer having a center region and a frame-like periphery section that is formed so as to be deeper than the center region.