Surface Treatment And Protection Method For Cadium Zinc Telluride Crystals

Patent · Tue Feb 21 00:00:00 EST 2006

OSTI ID:879901

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 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.

• 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 7,001,849
• Application Number: 10/326430
• OSTI ID: 879901
• Country of Publication: United States
• Language: English