Ionizing Radiation Detector

Patent · Tue Nov 18 00:00:00 EST 2003

OSTI ID:879898

Wright, Gomez W ^[1]; James, Ralph B ^[2]; Burger, Arnold ^[1]; Chinn, Douglas A ^[2]

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1. Nashville, TN
2. Livermore, CA

A CdZnTe (CZT) crystal provided with a native CdO dielectric coating to reduce surface leakage currents and thereby, improve the resolution of instruments incorporating detectors using CZT crystals is disclosed. A two step process is provided for forming the dielectric coating which includes etching the surface of a CZT crystal with a solution of the conventional bromine/methanol etch treatment, and passivating the CZT crystal surface with a solution of 10 w/o NH.sub.4 F and 10 w/o H.sub.2 O.sub.2 in water after attaching electrical contacts to the crystal surface.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• DOE Contract Number: AC04-94AL85000
• Assignee: Sandia National Laboratories (Livermore, CA)
• Patent Number(s): US 6649915
• Application Number: 10/325995
• OSTI ID: 879898
• Country of Publication: United States
• Language: English