Leybold Aktiengesellschaft

Degussa Aktiengesellschaft

Leybold Systems Gmbh

Andreas Rack

Christoph Daube

Martin Weigert

Uwe Konietzka

Uwe Kopacz

Horst Becker

Alfred Belz

Siegfried Schulz

Peter Sauer

Stefan Szellas

Apparatus for the gluing of two substrates in six processing steps for fabrication of a digital video disc including a motor-driven plate (,) for holding the first substrate (,), a glue dispenser disposed above the plate (,), grasping and holding device for providing vertical movement of the second substrate (,). The side of the plate turned toward the first substrate (,) has a radially outer plane portion (,) in the form of a disk concentric to its axis of rotation (R) and a radially inner portion (,) adjacent to this where the face (F) of this inner portion (,) turned toward the substrate (,) is formed by the outer face of a flat, straight frustum of a cone whose peak (S) strikes the axis of rotation (R) below the plane of application (E) of the substrate (,). In the transitional area from the annular portion (,) to the conical portion (,) an annular groove (,) running coaxially to the axis of rotation is cut into the plate (,) which is connected to a pressure source via channels (,&prime;, . . . ) and corresponds to teardrop or finger-like indentations or recesses (,&prime;, . . . ) in the conical portion (,) extending from the annular groove (,) radially inward.

Process for the adhesion of a flat plastic substrate in the form of a circular disk to a like second substrate for a digital video disc and apparatus for implementation of the process

For the production of a coating formed by cathode sputtering, a target made from an alloy of gold and preferably vanadium is used. During the cathode sputtering, nitrogen gas is used as the reactive gas. The result is the formation of vanadium nitrides on the substrate to be coated. By varying the nitrogen content, the proportion of the vanadium nitrides can be changed thereby causing the appearance and the hardness of the coating to also change. This change in coating characteristics can accommodate a broad range of requirements avoiding the necessity of using different targets for different coating characteristics.

Method for producing a decorative gold alloy coating

The invention concerns a process for coating a substrate 1 of little or no corrosion resistance, especially a metal substrate having an alloy consisting at least of Ni, Cr and Fe, in an evacuable coating chamber 15, 15a. It comprises making an electrode that can be connected to a current supply 10, this electrode being electrically connected to a target 3 which is sputtered and the sputtered particles of which are deposited on the substrate 1. Reactive process gases are, for this purpose, supplied to the coating chamber 15, 15a, so that an amorphously depositing layer 2 is applied onto the substrate.

Method for coating a substrate of low resistance to corrosion

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Hanau, Germany

Andreas Rack