Patent ID: 8114684
Filing Date: 2012-02-14
Classification: G01R,H01L

Abstract:
1. A complementary metal oxide semiconductor (CMOS) sensor system, comprising: a doped substrate; a doped central island extending downwardly within the doped substrate from an upper surface of the doped substrate; a first doped outer island extending downwardly within the doped substrate from the upper surface of the doped substrate, the first outer island electrically isolated from the central island within an upper portion of the substrate, and electrically coupled to the central island within a lower portion of the substrate; and a first buried doped well within a mid portion of the substrate, the first buried doped well electrically isolating each of the first outer island and the central island from the other of the first outer island and the central island within the mid portion of the substrate, the first buried doped well configured such that at least a portion of the first buried doped well is not directly beneath any portion within the upper portion of the substrate that electrically isolates the first outer island from the central island.