Abstract: Tubular target (1) has a magnet system (2) provided in the cavity (H) formed by the target (1) for the formation of a first plasma (6) for the coating of planar substrates (4) which are movable past the cathode (3), by means of a cathode sputtering process. A second plasma (9) is produced by a second magnet system (7) in the cavity (H) in an area between the cathode (3) and a plate (10) opposite the substrate (4).

Abstract: An optical recording medium for an audio-video or ROM compact disc comprises a pitted translucent base material and a layer of a corrosion resistant metal or combination of metals from the group consisting of tantalum, chromium, cobalt, and nickel. For example, TaNi or CrCo can be applied to the surface, providing good adhesion, reflecting light, providing a printable surface, and not requiring any further coating such as a protective lacquer.

Abstract: In an optical recording medium, for an audio-video or ROM compact disc comprising a pitted translucent base material and a layer (9) of a corrosion resistant metal or combination of metals from the groups 4N, 5N, 7N or 8N of the periodic table of elements is disclosed. For example NiCr can Be Applied onto the surface having the pits (7), thereby providing good adhesion, reflecting light and providing printable surface and not requiring any further coating such as a protective lacquer. Also, in the event that a gold-colored glossy layer is necessary, a CuBe layer can be sputtered onto the substrate (8).