Patent ID: 8018508
Filing Date: 2011-09-13
Classification: G02B,H01L

Abstract:
1. A solid-state imaging apparatus comprising arranged unit pixels, each of which includes a light-collector and a light-receiver, wherein said light-collector comprises: a substrate into which incident light is incident; and above said substrate, a plurality of light-transmitting films are formed in a region into which the incident light is incident, wherein each light-transmitting film of said plurality of light-transmitting films forms a zone having a width which is equal to or shorter than a wavelength of the incident light, wherein each zone shares a center point which is located at a position displaced from a center of said light-receiver, and said plurality of light-transmitting films form an effective refractive index distribution represented by a quadratic curve expressed by a distance from a center of a corresponding one of the unit pixels, wherein, in a unit pixel, among said unit pixels, which is located at a center of a plane on which said unit pixels are formed, a position at which an effective refractive index distribution of a corresponding light-collector represented by the quadratic curve reaches a maximum value matches a central axis of a corresponding light-receiver, and wherein in a unit pixel, among said unit pixels, which is located at a periphery of the plane, a position at which the effective refractive index distribution of a corresponding light-collector represented by the quadratic curve reaches a maximum value is displaced from the central axis of a corresponding light-receiver toward the center of the plane.