Molds having wear resistant release coatings

Details Molds having wear resistant release coatings Molds having wear resistant release coatings

1990-02-22

1992-05-12

Housel, James C.

Static molds

Including coating or adherent layer

Parting layer

2491141, 249141, 264338, 425810, 425812, 427135, B29C 3356

Patent

active

051120259

ABSTRACT:
A mold including a cavity the inner surface of which is at least partly coated with a layer selected from a diamond-like film and layers of fluorine and fluorine compounds. The mold is manufactured by a method which comprises placing at least a part of the mold which constitutes the surface portion of the mold cavity in a vacuum film-forming chamber, introducing a hydrocarbon gas into the chamber, ionizing the gas, and then evaporating it onto a desired surface portion of the mold, thus forming a diamond-like film over the mold portion. The mold portion is surface-treated by ionizing a low-molecular-weight fluorine compound into a plasma, forming a fluorine polymer film from the plasma on at least a part of the cavity surface, while applying a bias voltage to the plasma.

REFERENCES:
patent: 4482511 (1984-11-01), Komatsubara
patent: 4753414 (1988-06-01), McCandless
patent: 4783041 (1988-11-01), Sakaida et al.
patent: 4882827 (1989-11-01), Kusumi et al.
patent: 4948627 (1990-08-01), Hata et al.
Enke, "Hard carbon layers for wear protection and antireflection purposes of infrared devices", Applied Optics, 24(4), p. 508 (1985).
Yamamoto (Japanese Publication) "Properties of Carbonous Films Synthesized by RF Plasma CVD" (1989).
Nakayama et al., "Bias Effect on the Formation of Carbon Films by RF-Plasma CVD", J. Ceramic Soc.
Moravec et al., "Electron spectroscopy of ion beam and hydrocarbon plasma generated diamondlike carbon films", J. Vac. Sci. Technol., 18(2), Mar. 1981, pp. 226-228.
Moravec et al., "The development of diamond-like (i-carbon) thin films as anti-reflecting coatings for silicon solar cells", J. Vac. Sci. Technol., 20(3), Mar. 1982, pp. 338-340.

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