HIGH SECURITY ENGRAVED IDENTIFICATION CARD AND METHOD OF MAKING THE SAME

摘要

A method for making an engraved identification card comprises: sputter depositing a first metallic layer (12) onto a planar surface of an electrically non-conductive substrate (14); and forming an image by engraving parallel grooves through said metallic layer into said substrate with a tapering stylus and varying the depth of the groove to thereby vary the width of the metal covered surface between adjacent grooves.