Process of depositing a hard coating of a gold compound on a sub

Details Process of depositing a hard coating of a gold compound on a sub Process of depositing a hard coating of a gold compound on a sub

1981-03-25

1983-09-06

O'Keefe, Veronica

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428621, 428627, 428672, 63 12, 63 20, 427255, B32B 1504, C22C 104, C22C 105

Patent

active

044030142

ABSTRACT:
The invention relates to a process of deposition of a coating of a gold compound on a solid substrate. In a vacuum chamber (1), the substrate is fixed on a first substrate electrode (2). A composite target (5) essentially consists of gold and at least one of the metal compounds, such as nitride, carbide and boride of the metals of group IV b of the periodic classification of elements and tantalum. A high-purity argon atmosphere at pressure ranging between 4.times.10.sup.-4 and 3.times.10.sup.-2 Torr is then established in the chamber. The deposition of the coating is then carried out by ionic deposition or evaporation in vapor phase at a given rate. The invention may find application to coat articles of jewelry or of watch cases.

REFERENCES:
patent: 4226932 (1980-10-01), Ferraris
patent: 4252862 (1981-02-01), Nishida

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