Surface treatment and protection method for cadmium zinc telluride crystals

Patent · Wed Jan 01 00:00:00 EST 2003

OSTI ID:875075

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 NH.sub.4 F and 10 w/o H.sub.2 O.sub.2 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 6524966
• OSTI ID: 875075
• Country of Publication: United States
• Language: English

Related Subjects

surface
treatment
protection
method
cadmium
zinc
telluride
crystals
cdznte
czt
crystal
provides
native
dielectric
coating
reduce
leakage
currents
improve
resolution
instruments
incorporating
detectors
step
process
disclosed
etching
solution
conventional
brominemethanol
etch
attachment
electrical
contacts
passivating
10
nhsub4
hsub2
osub2
water
electrical contact
surface treatment
cadmium zinc
zinc telluride
reduce surface
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