Title:
【発明の名称】ダイアモンドマーキング
Document Type and Number:
Japanese Patent JP2001527477
Kind Code:
A
Abstract:
An information mark invisible to the naked eye is applied to the polished facet of a diamond gemstone by coating the diamond gemstone surface with an electrically conductive layer so as to prevent the diamond becoming charged, forming the mark with a focused ion beam, and cleaning the diamond surface with a powerful oxidizing agent to reveal a mark having an appropriate depth, which does not detrimentally affect the clarity or color grade of the diamond.
Inventors:
Smith, James Gordon Charters
Stewart, Andrew David Gary
Stewart, Andrew David Gary
Application Number:
JP55014598A
Publication Date:
December 25, 2001
Filing Date:
May 22, 1998
Export Citation:
Assignee:
Gerzan Establishment
International Classes:
B23K26/00; B44B7/00; B44C1/22; H01J37/305; H01J37/317; A44C17/00; (IPC1-7): B44C1/22; A44C17/00; B23K26/00
Attorney, Agent or Firm:
Tadahiko Ito (1 outside)