Patent ID: 7875890
Filing Date: 2011-01-25
Classification: H01L,Y02E

Abstract:
1. A method of fabrication of a photodiode array on a silicon substrate having first and second surfaces comprising: providing a first matrix of regions of a first conductivity type of a higher conductivity than the substrate extending into the substrate from the first surface and surrounding each photodiode of the array; providing a plurality of regions of a second conductivity type interspersed within the first matrix of regions of the first conductivity type; providing a second matrix of regions of a first conductivity type of a higher conductivity than the substrate extending into the substrate from the second surface, the second matrix being aligned with the first matrix, the first and second matrices extending into the substrate but not touching each other; and, providing a plurality of contacts on the first surface for making electrical contact to the first matrix of regions of the first conductivity type and the plurality of regions of the second conductivity type.