Mold and method of manufacturing the same

Details Mold and method of manufacturing the same Mold and method of manufacturing the same

1994-11-04

1997-09-02

Turner, Archene

Stock material or miscellaneous articles

Self-sustaining carbon mass or layer with impregnant or...

428216, 428336, 428457, 428698, 428701, 428702, 428704, 65 606, 6537415, C03C 2300, B30B 1500

Patent

active

056629990

ABSTRACT:
A mold used for press-molding precision parts, such as an optical element formed of glass. A carbon film is formed at least on the molding surface of a matrix of the mold via an intermediate layer or without such a layer. The carbon film is shaped with a carbon ion beam having a desired ion energy such that a plurality of projections having an average height of from 0.5 to 30 nm are arranged at an average pitch of from 5 to 30 nm. Such a shape of the carbon film decreases the surface energy and frictional coefficient of the film and increases adhesion strength of the film to the matrix without impairing the surface roughness of an optical element to be molded. Thus, a resultant mirror surface of the mold is highly durable, free from film peeling and cracks in the formation of glass.

REFERENCES:
patent: 4935303 (1990-06-01), Ikoma et al.
patent: 5026415 (1991-06-01), Yamamoto et al.
patent: 5032159 (1991-07-01), Kuwabara et al.
patent: 5202156 (1993-04-01), Yamamoto et al.
patent: 5380349 (1995-01-01), Taniguchi et al.

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