Surface treatment and protection method for cadmium zinc telluride crystals
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United States of America Patent
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Feb 21, 2006
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N/A
app pub date -
Dec 19, 2002
filing date -
Jul 16, 1998
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Expired
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Abstract
A method for treatment of the surface of a CdZnTe (CZT) crystal that provides a native dielectric coating to reduce surface leakage currents and thereby, improve the resolution of instruments incorporating detectors using CZT crystals. A two step process is disclosed, etching the surface of a CZT crystal with a solution of the conventional bromine/methanol etch treatment, and after attachment of electrical contacts, passivating the CZT crystal surface with a solution of 10 w/o NH4F and 10 w/o H2O2 in water.
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