Battelle Memorial Institute

Asu Composants S.a.

Erich Bergmann

Georges Melet

Gerard Horlaville

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.

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

A metal chalcogenide coating, in particular of molybdenum sulphide, is deposited on a substrate by high speed cathode sputtering. This coating is turbostratic and has an unusually high resistance to wear produced by frictional forces.

Process for depositing on substrates, by cathode sputtering, a

The invention concerns a process for manufacturing electrodes for fuel cells operating at elevated temperatures, said process consisting in depositing by cathodic sputtering on a solid electrolyte substrate active mixtures of oxides and metals. The control of the relative rates of deposition of the various constituents of these active compositions is achieved by regulating individually independent magnetic fields acting on each of the components subjected to sputtering. A very high degree of homogeneity within the layers and of reproducibility of the compositions of the mixtures is achieved in this manner.

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Bienne, Switzerland

Erich Bergmann