Surface treatment and protection method for cadmium zinc telluride crystals
US6524966B1 · kind B1 · utility
14Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2000 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Mar 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L21/465
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
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.