Information record stampers

Details Information record stampers Information record stampers

1979-08-17

1981-04-21

Gantz, Delbert E.

Static molds

Including coating or adherent layer

249103, 249140, 425403, 425810, 204192C, 427250, B29C 104, B29D 1700

Patent

active

042628750

ABSTRACT:
Video disc nickel stampers are coated with a very thin, e.g., 100-250 angstroms, non-grainy layer of chromium which imparts increased scratch resistance to carbon-filled polyvinylchloride resins during compression molding.

REFERENCES:
patent: 713863 (1902-11-01), Edison
patent: 1954950 (1934-04-01), Russell
patent: 2758961 (1956-08-01), Kosowsky
patent: 3480483 (1969-11-01), Wilkinson
patent: 3842194 (1974-10-01), Clemens
patent: 3842217 (1974-10-01), Clemens
patent: 3904488 (1975-09-01), Nosker et al.
patent: 4044379 (1977-08-01), Halter
patent: 4060831 (1977-11-01), Halter
patent: 4131530 (1978-12-01), Blum et al.
K. J. Stagg, The Development of Electroforming, Product Finishing, Sep. 1978, p. 27.
Handbook of Thin Film Technology, L. I. Maissel and R. Glang, Editors; McGraw-Hill Book Co., New York, 1970, pp. 3-8.

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