Patent ID: 9224768
Filing Date: 2015-12-29
Classification: H01L

Abstract:
1. An array of photon detectors having a plurality of photon detector pixels, comprising: an intrinsic silicon layer; an N+ or P+ type doped silicon layer disposed in one surface of the intrinsic silicon layer, such surface being adapted to intercept photons; a first plurality of doped silicon regions disposed in laterally spaced regions in an opposite surface of the an intrinsic silicon layer, each one of the first plurality of doped regions having a conductivity type opposite the conductivity type of the doped silicon layer, the doped silicon layer and the first plurality of doped silicon regions forming, and being biased to form, a plurality of reverse biased PiN diodes, each one of the PiN diodes corresponding to one of the photon detector pixels; a second plurality of silicon doped regions each one being disposed between a corresponding adjacent pair of the first plurality of doped silicon regions, the second plurality of doped region having the same conductivity type as the doped silicon layer and a doping concentration less than the doping concentration of the doped silicon layer; a gate electrode structure disposed on said opposite surface, the gate electrode structure having portions disposed over the second plurality of silicon doped regions; a voltage source connected to the gate electrode structure having a voltage level to reduce leakage current between the doped layer and the first plurality of doped silicon regions.