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Semiconductor radiation detector with internal gain

United States Patent

April 1, 2003
View the Complete Patent at the US Patent & Trademark Office
An avalanche drift photodetector (ADP) incorporates extremely low capacitance of a silicon drift photodetector (SDP) and internal gain that mitigates the surface leakage current noise of an avalanche photodetector (APD). The ADP can be coupled with scintillators such as CsI(Tl), NaI(Tl), LSO or others to form large volume scintillation type gamma ray detectors for gamma ray spectroscopy, photon counting, gamma ray counting, etc. Arrays of the ADPs can be used to replace the photomultiplier tubes (PMTs) used in conjunction with scintillation crystals in conventional gamma cameras for nuclear medical imaging.
Iwanczyk; Jan (Los Angeles, CA), Patt; Bradley E. (Sherman Oaks, CA), Vilkelis; Gintas (Westlake Village, CA)
Photon Imaging, Inc. (Northridge, CA)
09/ 835,829
April 16, 2001
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with government. support under Small Business Innovation Research program (Grant #DE-FG03-99ER82853) awarded by the Department of Energy. The Government has certain rights in this invention.