Patent ID: 7112465
Filing Date: 2006-09-26
Classification: H01L

Abstract:
1. A method of fabricating a photodiode array comprising: providing a semiconductor substrate having first and second surfaces; providing a first region in the form of a matrix of regions of a first conductivity type of a higher conductivity than the substrate, including a high temperature diffusion, the first region extending into the substrate from the first surface; providing a plurality of regions of a second conductivity type interspersed within the matrix of regions of the first conductivity type, including an additional high temperature diffusion, a second region extending into the substrate from the first surface a shorter distance than the first region; grinding the substrate from the second surface to reduce the thickness of the substrate and to expose the matrix of regions of a first conductivity type and not the plurality of regions of the second conductivity type at the second surface of the substrate; providing a layer of the first conductivity type having a conductivity greater than the substrate on the second surface of the substrate; and, providing a plurality of electrical contacts at the first surface for the first region in the form of a matrix of regions of the first conductivity type and the plurality of regions of the second conductivity type.