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Surface treatment and protection method for cadmium zinc telluride crystals

Patent ·
OSTI ID:875075
 [1];  [2];  [1];  [2]
  1. Nashville, TN
  2. Livermore, CA
+ Show Author Affiliations

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 NH.sub.4 F and 10 w/o H.sub.2 O.sub.2 in water.

Research Organization:
SANDIA CORP
DOE Contract Number:
AC04-94AL85000
Assignee:
Sandia National Laboratories (Livermore, CA)
Patent Number(s):
US 6524966
OSTI ID:
875075
Country of Publication:
United States
Language:
English

References (3)

Unipolar charge sensing with coplanar electrodes-application to semiconductor detectors journal January 1995
Performance of CdZnTe coplanar-grid gamma-ray detectors journal June 1996
Exploratory search for improved oxidizing agents used in the reduction of surface leakage currents of CdZnTe detectors
  • Wright, Gomez W.; Chinn, Douglas; Brunett, Bruce A.
  • SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, SPIE Proceedings https://doi.org/10.1117/12.366617
conference October 1999

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Related Subjects

/438/
10
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brominemethanol
cadmium
cadmium zinc
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nhsub4
osub2
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provides
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water
zinc
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