Patent ID: 7271468
Filing Date: 2007-09-18
Classification: H01L

Abstract:
1. A charge coupled device for detecting electromagnetic and particle radiation, comprising: a high-resistivity, semiconductor substrate having a front side and a back side, the substrate having a first conductivity type; a plurality of buried channel regions on the front side of the substrate for collecting signal charge produced in the substrate by incident radiation, the channel regions having a second conductivity type, the second conductivity type opposite the first conductivity type; gate electrode circuitry patterned on the front side of the substrate for transfer and storage of the signal charge; amplifier circuitry for receiving signal charge transferred by the gate electrode circuitry; a first voltage source connected to the substrate and configured for forming depletion regions within the substrate, and for creating a drift electric field in the substrate to transport the signal charge to the channel regions; a guard ring having the second conductivity type and connected to a second voltage source, a portion of the guard ring positioned approximately 1 μm to 100 μm from at least one channel region; a channel stop having the first conductivity type and having higher doping than the substrate, the channel stop disposed near the front side of the substrate and covered by a field oxide layer, the channel stop connected to a third voltage source; and a polysilicon electrode over the field oxide and the channel stop, the polysilicon electrode connected to a fourth voltage source.