Patent ID: 8227884
Filing Date: 2012-07-24
Classification: H01L

Abstract:
1. An apparatus comprising: a surface to receive light, wherein the surface that is to receive the light is a backside surface; a plurality of photosensitive regions of a first dopant type disposed within a substrate of a second dopant type that is different than the first dopant type, wherein the photosensitive regions are disposed within a frontside portion of the substrate of the second dopant type; one or more interconnect layers disposed within dielectric material located on the frontside portion of the substrate of the second dopant type; a material of the substrate of the second dopant type coupled between the surface and the plurality of photosensitive regions of the first dopant type, the material to receive the light, at least some of the light to free electrons in the material; and a plurality of discrete electron repulsive elements of the second dopant type, the discrete electron repulsive elements coupled between the surface and the material of the substrate of the second dopant type, each of the discrete electron repulsive elements corresponding to a different photosensitive region of the plurality, and each of the discrete electron repulsive elements to repel electrons in the material toward a corresponding photosensitive region, wherein the material of the substrate of the second dopant type separates the plurality of discrete electron repulsive elements of the second dopant type and the plurality of photosensitive regions of the first dopant type.