摘要:
A method for producing amorphous carbon coatings on substrates by degrading a gaseous hydrocarbon compound in an ionized gas atmosphere within a reaction chamber. An electromagnetic alternating field is used for the excitation of the plasma. To achieve the object of increasing the deposition rate and permitting substrates even of great surface area to be uniformly coated, the frequency of the electromagnetic alternating field is selected in the microwave region (915 to 2,540 MHz). Furthermore, the microwave energy is put into the gaseous atmosphere by means of at least one ladder-type waveguide situated outside of the reaction chamber. The invention also relates to a substance provided with an amorphous carbon coating, in which an adhesion-mediating coating consisting of a polymer from the group of the siloxanes or silazanes is provided between the substrate and the amorphous carbon coating.
摘要:
A magnetron cathode for cathodic evaporation apparatus with a target holder (10) for releasably securing a plate-like target (9). The associated magnet arrangement (7) has pole faces (7c, 7d) for producing at least one circumferentially closed tunnel of magnetic field lines which overlaps the target. The magnet arrangement (7) is accommodated in a housing of non-ferromagnetic material which extends over the pole faces. To increase the utilization factor of the target material without the pole faces or housing parts participating in the atomization process,(a) the projections of the target (9 ) and the pole faces (7c, 7d) in a common plane parallel to the target face (9a) do not intersect each other,(b) in the zone of the pole faces (7c, 7d), the housing (16) is extended in the atomization direction in front of the target face (9a) or in the extreme case lies in the plane of the target face (9a), and(c) the housing (16) together with the magnet system (7) is electrically insulated as regards both the target holder (10) and earth (4).
摘要:
In particular for exhaust-gas purification, different processes have been proposed. According to the invention, the polluted exhaust gas flows through a reactor volume to which non-thermal gas discharges are applied, while being brought into contact with a solid reducing agent at least once, and preferably several times. The reducing agent can, in particular, consist of carbon fibers. A suitable device for combining dielectric barrier discharges with the reduction has means for field enhancement substantially periodically spaced in the reactor.
摘要:
Apparatus for coating substrates by means of a reaction for depositing atoms or molecules which is initiated by a plasma. A reaction chamber (1) is equipped with at least one window (22, 23), penetrable by microwaves, with at least one wave-guide structure (16, 17), arranged outside the chamber (1) and in front of the window (22, 23), and with a distributing means (25) discharging into the chamber.According to the invention and for the purpose of achieving the object of facilitating inspection and repairs, the window (22, 23) penetrable by microwaves, the one or more wave-guide structures (16, 17) and the distributing means (25) are all secured in or on a support frame (10), which can be removed, or swung away, from the reaction chamber (1) as a single unit.
摘要:
A magnetron cathode for sputtering ferromagnetic targets. The magnet system consists of magnet poles of opposite polarity lying one within the other disposed on a basic cathode body. Between the target and the pole shoes, which consist of target material, two circumferential air gaps in the direction of the depth of the system are formed. The surfaces of projection of the magnet poles and target do not overlap. For the purpose of making the target ablation uniform while simultaneously achieving high sputtering rates, the pole shoes are separated, in accordance with the invention, each by a distance S from the magnet poles. The magnet poles lie in an area which runs from a plane passing through the sputtering surface in the direction of the depth of the system. Between the pole shoes and the target, on the one hand, and the magnet poles on the other, there is disposed a thermally conductive metal body which is in communication with at least one coolant passage and consists of a nonferromagnetic material.
摘要:
The invention relates to apparatus for producing a microwave plasma for the treatment of substrates, and in particular for the plasma polymerization of monomers for coating substrates. The apparatus consists of a reaction chamber with a carrier for conveying the substrates and a way for maintaining an atmosphere of ionizable gases and monomers. The apparatus also has a first and at least one second wave-guide structure which are arranged at opposite acute setting angles to the surface of the substrate carrier and are each connected at one end to a microwave transmitter by way of a hollow conductor. Thus, the treatment intensities, i.e. the rates of deposition, are superposed, and this leads to greater uniformity in the properties of the product. The apparatus may also include angling the wave-guide structures toward each other and staggering crossbar structures in the wave-guides for further improvement.
摘要:
In automobiles, for example, the exhaust fumes must pass through a plasma reactor operating by the principle of dielectrically inhibited ("silent") discharge, consisting of an arrangement of flat plates with alternating metallic and dielectric layers, whereby a plurality of adjacent discharge paths in parallel in the flow direction are formed. According to the invention, the discharge paths border on a single metallic electrode surface or layer (62, 72) and the electric power is supplied (58, 59) from two different sides with the metallic layers (62, 72) having alternating polarities.
摘要:
A variable high-current resistor, especially for use as a protective element in power switching technology has already been proposed, which contains carbon as a resistance material, at least one boundary layer with a transition zone to another electric conductor being provided. By applying a contact pressure, the resistance in the transition zone can be kept low. Under the prior art, the resistance is converted into a highly resistive state by means of Joulean heat. In accordance with the invention, the contact pressure of the variable high-current resistor is able to be selectively influenced, the carbon- and/or carbon-black-containing layer being pressed by the surface pressure with a preset first value against the other conductor to adjust the low-resistance state of the resistor, and that, in the event of a short-circuit, this contact pressure being able to be reduced in a short enough time to a second value, at which the resistance in the transition zone goes up by at least two orders of magnitude. High-current resistors of this type are able to be used in conjunction with circuit-breakers, power semiconductors, contactors and vacuum contactors.
摘要:
A method for producing amorphous carbon coatings on substrates by degrading a gaseous hydrocarbon compound in an ionized gas atomsphere within a reaction chamber. An electromagnetic alternating field is used for the excitation of the plasma. To achieve the object of increasing the deposition rate and permitting substrates even of great surface area to be uniformly coated, the frequency of the electromagnetic alternating field is selected in the microwave region (915 to 2,540 MHz). Furthermore, the microwave energy is put into the gaseous atmosphere by means of at least one ladder-type waveguide situated outside of the reaction chamber. The invention also relates to a substrate provided with an amorphous carbon coating, in which an adhesion-mediating coating consisting of a polymer from the group of the siloxanes or silazanes is provided between the substrate and the amorphous carbon coating.