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

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

C - Chemistry, Metallurgy

22

C

204/96.13, 75/1.

C22C 1/04 (2006.01) A44C 27/00 (2006.01) C23C 14/14 (2006.01) G04B 37/22 (2006.01)

Patent

CA 1181614

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 sub- strate 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 4x10-4 and 3x10-2 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.

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