Fingerprinting crystals
US4316385A · kind A · utility
18Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1980 |
| Grant date | Feb 23, 1982 |
| Priority date | — |
| Expiry date | Jun 18, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/60
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A smooth surface of a diamond or cubic boron nitride crystal is bombarded with ions sufficiently to penetrate the surface and impart an ion implanted region in the crystal in a predetermined pattern, the resulting crystal is charged electrostatically, and a powder is applied to the charged smooth surface producing a pattern thereon which is a delineation of the implanted region and can be used to identify or fingerprint the crystal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.