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Radiation detector with shielding electrode

  • US 6,037,595 A
  • Filed: 10/14/1997
  • Issued: 03/14/2000
  • Est. Priority Date: 10/13/1995
  • Status: Expired due to Term
First Claim
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1. A cross-strip radiation detector, comprising:

  • (a) a semiconductor having a plurality of sides and of sufficient thickness to interact with ionizing radiation;

    (b) at least one independent bias electrode formed on a first side of the semiconductor and maintained at a bias voltage;

    (c) a plurality of signal electrodes formed on a second side of the semiconductor opposing the first side and coupled to form at least two independent signal strips parallel to each other, each signal strip including one or more electrically coupled signal electrodes and being set at a signal electrode voltage and operable to produce a signal indicative of an amount of charge produced in the semiconductor in response to an ionizing event and to provide a coordinate of a location of the ionizing event;

    (d) at least one shield electrode strip, formed on the second side of the semiconductor in a direction that is not parallel to the signal strips and electrically insulated from the signal strips, the shield electrode strip operable to produce an identification signal induced by the ionizing event to determine another coordinate of the location of the ionizing event; and

    (e) a signal conditioning circuit coupled to the signal strips and the shield electrode strip and configured to process the signal from at least one signal strip to determine the amount of charge of the ionizing event, without reference to the identification signal.

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