Method of manufacturing molds for molding optical glass elements

Details Method of manufacturing molds for molding optical glass elements Method of manufacturing molds for molding optical glass elements

1988-08-23

1989-06-27

Kellogg, Arthur

Glass manufacturing

Processes

Fusion bonding of glass to a formed part

65 31, 65 37, 65102, 156638, 35016211, 35016222, C03B 1108, G02B 518

Patent

active

048426334

ABSTRACT:
A base material excellent in heat resistance and high-temperature strength is processed into a desired configuration. The processed base material is coated with a heat-resistant film having excellent strength at high temperatures and low reactivity with a glass material to be molded. A resist is applied on the heat resistant film and a desired pattern is drawn thereon by means of electron beam, ion beam, hologram exposure, or ordinary photolithography. Or if a mold having deep unevenness of the pressing surface is required, the resist is applied after an intermediate layer which permits selective etching is formed on the heat resistant film, and the required pattern is drawn thereon by means of electron beam, ion beam, hologram exposure, or ordinary photolithography. The intermediate layer is removed by wet etching or dry etching to emphasize unevenness of the mask. The resist film or the resist film and intermediate layer film are completely removed and a part of the heat-resistant film is removed to obtain a mold having the desired configuration of the molding surface.

REFERENCES:
patent: 2272119 (1942-02-01), Jaeckel
patent: 3530010 (1970-09-01), Blakely
patent: 3743507 (1973-07-01), Chung/sen/ih et al.
patent: 4227769 (1980-10-01), Phillips et al.
patent: 4654119 (1987-03-01), Cook et al.
patent: 4797316 (1989-01-01), Hecq et al.

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