Ionizing radiation detector
US6649915B2 · kind B2 · utility
8Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2002 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Dec 19, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F71/1253
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A CdZnTe (CZT) crystal provided with a native CdO dielectric coating to reduce surface leakage currents and thereby, improve the resolution of instruments incorporating detectors using CZT crystals is disclosed. A two step process is provided for forming the dielectric coating which includes etching the surface of a CZT crystal with a solution of the conventional bromine/methanol etch treatment, and passivating the CZT crystal surface with a solution of 10 w/o NH4F and 10 w/o H2O2 in water after attaching electrical contacts to the crystal surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.