Patent ID: 6259085
Filing Date: 2001-07-10
Classification: H01L

Abstract:
A back illuminated fully depleted charge coupled device (CCD) for the detection of electromagnetic radiation and charged particles, comprising:a substantially thick high resistivity photon sensitive silicon substrate having a frontside and a backside;a plurality of CCD buried channel regions on the frontside of the substrate, the channels being of opposite conductivity type from the substrate, for collecting signal charge produced in the substrate by incident electromagnetic radiation or charged particles;CCD gate electrode circuitry patterned on the frontside for transfer of collected signal charge;CCD amplifier circuitry for detecting the collected signal charge transferred by the gate electrode circuitry;an electrically conducting ohmic contact layer on the backside of the substrate and having the same conductivity type as the substrate;a backside bias voltage source connected to the substrate for at least fully depleting the substrate through its entire thickness of charge carriers to create a drift electric field in the volume of the substrate to provide for transport of signal charge carriers produced in the substrate by incident radiation to the buried channel regions.