Apparatus and method for positively identifying synthetic silico

Details Apparatus and method for positively identifying synthetic silico Apparatus and method for positively identifying synthetic silico

1997-09-29

1999-09-21

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Ultraviolet light responsive means

2503361, 356 30, 324 96, 324133, 324149, G01N 2187, G01R 3100

Patent

active

059557354

ABSTRACT:
A target gemstone is irradiated with ultraviolet energy while sensing the electrical potential across the gemstone. A silicon carbide gemstone will generate an electrical potential and, therefore, can be positively identified, as distinct from other gemstones such as diamond and cubic zirconia that do not produce a potential.

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Dale M. Brown, et al. "Silicon Carbide UV Photodiodes." IEEE Transaction on Electron Devices, vol. 40. No. 2. pp. 325-333, Feb. 1993.
J. Edmund et al. "6H-Silicon Carbide Light Emitting Diodes and UV Photodiodes" (1997) Phys. Stat. Sol. (9) 162 pp. 481-491.

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