Process for producing glass mold
AssigneeHoya Corporation
InventorsYasuo Kusumi, Ken Uno, Takuo Fujino
Life of this patent
Estimating the term…
Abstract
According to the present process for producing a glass mold, a base for a glass mold to be produced is subjected to a sputtering treatment using an inert gas and graphite as a target at a mold base temperature of 250.degree.-450.degree. C., and thereby is formed on the mold base a hard carbon film having excellent adhesion to the mold base and excellent hardness and being unliable to cause fusion bonding to a molded glass article produced. Accordingly, the glass mold produced according to the present process has excellent durability and excellent glass releasability.
Claims6
A process for producing a glass mold, said process comprising the steps of:
- (a) processing a material for a base having a surface for a glass mold to be produced into a mold base having a shape corresponding to that of a molded glass article to be produced from the mold;
- (b) forming a .beta.-SiC having (111) plane orientation on the surface of the mold base according to a chemical vapor deposition (CVD) method;
- and
- (c) forming a hard carbon film on the mold base according to a sputtering method using an inert gas and graphite as a target at a mold base temperature of 250.degree.-450.degree. C.
Dependencies are inferred from the claim text.