Method for surface treatment of a cadmium zinc telluride crystal

Patent · 31 December 1998

OSTI ID:872427

James, Ralph ^[1]; Burger, Arnold ^[2]; Chen, Kuo-Tong ^[3]; Chang, Henry ^[4]

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1. 5420 Lenore Ave., Livermore, CA 94550
2. 753 Adkisson La., Nashville, TN 37205
3. 7800 River Fork Dr., Nashville, TN 37221
4. 6535 Premier Dr., Apt. A7, Nashville, TN 37209

A method for treatment of the surface of a CdZnTe (CZT) crystal that reduces surface roughness (increases surface planarity) and provides an oxide coating to reduce surface leakage currents and thereby, improve resolution. A two step process is disclosed, etching the surface of a CZT crystal with a solution of lactic acid and bromine in ethylene glycol, following the conventional bromine/methanol etch treatment, and after attachment of electrical contacts, oxidizing the CZT crystal surface.

• Research Organization: SANDIA CORP
• DOE Contract Number: AC04-94AL85000
• Assignee: James, Ralph (5420 Lenore Ave., Livermore, CA 94550);Burger, Arnold (753 Adkisson La., Nashville, TN 37205);Chen, Kuo-Tong (7800 River Fork Dr., Nashville, TN 37221);Chang, Henry (6535 Premier Dr., Apt. A7, Nashville, TN 37209)
• Patent Number(s): US 5933706
• OSTI ID: 872427
• Country of Publication: United States
• Language: English

Related Subjects

/438/
acid
attachment
bromine
cadmium
cadmium zinc
cdznte
coating
contacts
conventional
crystal
crystal surface
currents
czt
czt crystal
disclosed
electrical
electrical contact
electrical contacts
etch
etching
ethylene
ethylene glycol
following
glycol
improve
increases
lactic
lactic acid
leakage
leakage current
leakage currents
methanol
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oxide
oxide coating
oxidizing
planarity
process
provides
reduce
reduce surface
reduces
reduces surface
resolution
roughness
solution
step
step process
surface
surface leakage
surface roughness
surface treatment
telluride
telluride crystal
treatment
zinc
zinc telluride