Mold with hydrogenated amorphous carbon film for molding an opti

Details Mold with hydrogenated amorphous carbon film for molding an opti Mold with hydrogenated amorphous carbon film for molding an opti

1989-08-15

1991-06-25

Schor, Kenneth M.

Glass manufacturing

Press molding machine

65 24, 65 26, 6537413, 6537415, 249134, 2491141, 106 3827, 106 3828, 427133, 427135, C03B 1902, C03B 4002, C03B 40033

Patent

active

050264150

ABSTRACT:
This specification discloses a mold for use for press-molding an optical element, characterized in that at least the molding surface of a mold base material is coated with an a-C:H film containing 5-40 atom % of hydrogen therein and having a film density of 1.5 g/cm.sup.3 or more. Other mold coating films also disclosed are a hydrogenated amorphous carbon film with an intermediate carbide layer between the film and the molding surface, and a hard carbon film containing 0-5 atom % of hydrogen therein and having a spin density of 1.times.10.sup.18 spin/cm.sup.3 or less and a film densisy of 1.5 g/cm.sup.3 or more.

REFERENCES:
patent: 4731302 (1988-03-01), Weissmantel et al.
patent: 4783361 (1988-11-01), Ovshinsky et al.
patent: 4844785 (1989-07-01), Kitabatake et al.
patent: 4879074 (1989-11-01), Waku et al.
patent: 4882827 (1989-11-01), Kusumi et al.

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