Diamond marking
An information mark invisible to the naked eye is applied to the polished facet of a diamond gemstone by irradiation with a low energy ion beam to prevent charging, forming the mark with a focussed ion beam and cleaning the diamond with a powerful oxidising agent. The surface may be coated with gold...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | An information mark invisible to the naked eye is applied to the polished facet of a diamond gemstone by irradiation with a low energy ion beam to prevent charging, forming the mark with a focussed ion beam and cleaning the diamond with a powerful oxidising agent. The surface may be coated with gold to which an electrical connection is made to prevent charging. Gallium ions may be used with a molten salt eg KNO 3 as oxidising agent. |
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