Patent ID: 6354111
Filing Date: 2002-03-12
Classification: C03B

Abstract:
A die for press-forming glass elements, comprising:a main body portion comprising a cemented carbide base material, said main body portion having at least two groups of ridge-shaped projections extending from a surface thereof, said groups being spaced from one another along said surface and each group containing at least two, substantially identical ridges in the shape of an inverted V; and a film formed on said main body portion, having a total film thickness of about 0.01-5 &mgr;m, said film comprising at least a platinum film layer having a thickness greater than at least 0.01 &mgr;m on the outermost surface of said film, wherein said platinum thin film layer has a sufficiently low surface roughness to press-form a glass element having a surface roughness within a range of 0.4 to 1.2 &mgr;m.