Surface treatment and protection method for cadmium zinc telluride crystals
US7001849B2 · kind B2 · utility
3Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2002 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Sep 12, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F71/1253
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.