Patent ID: 7728277
Filing Date: 2010-06-01
Classification: H01L

Abstract:
1. Am image sensor with an image area having a plurality of pixels each having a photodetector of a p conductivity type, the image sensor comprising: (a) a substrate of the p conductivity type; (b) a first layer of n conductivity type between the substrate and the p-type photodetectors which use holes as charge carriers, wherein the first layer spans the entire image area having the plurality of pixels and includes doping that is graded so as to drive excess carriers into the substrate; (c) a contact electrically connected to the first layer for biasing the first layer at predetermined potential with respect to the substrate for driving excess carriers into the substrate to reduce cross talk; (d) one or more adjacent active P-channel Metal Oxide Semiconductor (PMOS) electronic components disposed in the first layer within each pixel; and (e) CMOS electronic support circuitry disposed in the substrate outside of the image area and electrically connected to the image area.