Abstract:
A process for creating plasma polymerized deposition on a substrate by a corona discharge is described. The corona discharge is created between an electrode and a counterelectrode supporting a substrate. A mixture of a balance gas and a working gas is flowed rapidly through the electrode, plasma polymerized by corona discharge, and deposited onto the substrate as an optically clear coating. The process, which is preferably carried out at or near atmospheric pressure, can be designed to create an optically clear powder-free or virtually powder free deposit that provides a substrate with properties such as surface modification, chemical resistance, and barrier to gases.
Abstract:
A method and an apparatus for treating a workpiece using a plasma are disclosed in the present invention. In treating a workpiece using a plasma, the apparatus includes at least one pin electrode (11) for receiving a power source(10), a dielectric body (12) having first and second sides, wherein the first side is coupled to the pin electrode (11) and the second side has at least one capillary (13) extending to a direction of the first side of the dielectric body, and each capillary (13) is substantially aligned with each pin electrode (11), and a counter electrode (15) electrically coupled to the pin electrode for generating the plasma from each capillary.
Abstract:
In one embodiment, the present invention is a method of coating at least one wafer with silicon nitride. The first step in the method is assembling at least one electrode set, wherein each electrode set includes at least one dielectric barrier between a top electrode and a bottom electrode. The second step is flowing at least one purge gas and at least one reactant at least partially between the electrodes, of at least one electrode set, substantially at atmospheric pressure. The next step in the inventive method is placing a wafer between the electrodes of at least one electrode set, wherein the wafer is substantially encompassed by the flowing gas. The last step in this embodiment of the inventive method is supplying AC power to at least one electrode set thereby causing a dielectric barrier discharge.
Abstract:
During a process, in which a surface is treated using a glow discharge plasma, which is held between two electrodes (10, 10') inside a gas under essentially ambient pressure, undesired effects of plasma filaments, which occur in plasmas of this type, are prevented. To this end, the surface (17) to be treated is positioned inside a peripheral area (14') of the plasma, that is to say, at one side of the plasma space (14) defined by the electrode surfaces (11, 11'), beyond a pair of edges (13, 13'), which are aligned with one another, of the electrode surfaces (11, 11'), and at a distance of a few millimeters from these edges (13, 13'), and said surface is positioned such that it is pointed toward the edges (13, 13'). The treatment gas or the treatment gas mixture is fed to the plasma space (14) from one side, which is located opposite the side of the plasma peripheral area (14'), inside of which the surface (17) to be treated is positioned. During treatment, a substrate (16), whose one surface (17) is to be treated, is stationary or is advanced in direction that is essentially perpendicular to the electrode surfaces (11, 11'), for example, on the peripheral surface of an appropriately arranged rotating drum.
Abstract:
The invention concerns a method for performing chemical reactions between gaseous species in accordance with a selective reaction path, by generating an electric discharge (12) in a starting gas between two energizing electrodes (23, 24) whereto is applied an electric supply voltage, so that the discharge brings about energization of at least one of the gaseous species of said starting gas. The invention is characterised in that it consists in providing the following: the starting gas includes at least a carrier gas and at least a reaction gas; the conditions of electric supply of the electrodes are adapted to enable the generation of metastable species among the species of said carrier gas, so that the ratio, in the inter-electrode space, between the concentration in said metastable species and the concentration in electrons is not less than 1.
Abstract:
The present invention concerns a method of multifunctional surface treatment, involving a cleaning process and a subsurface plasma coating, whereby the mixture is injected in a gas phase onto the surface to be treated, across through holes provided in the working surface of the anode system. The surface treatment device contains a source and a chamber in which are placed the object to be treated in the working surface as well as the anode and cathode systems. The inventive device is characterized by the presence of a reactor mounted on the anode system and an electrolyte container, arranged inside the chamber and connected to said anode system. The invention enables the surface cleaning to be improved, the operational life of the coating to be guaranteed and the technical process to be accelerated.
Abstract:
Diamondlike carbon is deposited on a deposition substrate (46) ina deposition apparatus (40) that can be evacuated and backfilled with a carbonaceous gas. A plasma (68) is generated in the gas by heating a filament (62) within the chamber (42) to produce electrons, and positively biasing the filament (62) with respect to the deposition chamber wall (44) to accelerate the electrons into the carbonaceous gas. The carbonaceous gas dissociates and ionizes in the resulting plasma (68) to produce positively charged carbon ions. The deposition substrate (46) within the chamber (42) is negatively biased with respect to the deposition chamber wall (44), acccelerating the carbon ions so that they are deposited onto the surface of the substrate (46).
Abstract:
A method for preserving the precision-edges of a precision-edged substrate by applying to a substrate a corrosion resistant coating comprising a diamond-like solid state material having interpenetrating atomic scale networks comprising a first diamond-like carbon network stabilized by hydrogen, a silicon network stabilized by oxygen, and optionally at least one network made from dopant elements or dopant compounds containing elements from Groups 1-7b and 8 of the periodic table.
Abstract:
An electrically tunable coating and method for its fabrication and deposition comprising, as a coating on a substrate, a diamond-like nanocomposite solid-state material having interpenetrating atomic scale networks of carbon in a diamond-like carbon network stabilized by hydrogen, a glass-like silicon network stabilized by oxygen, and optionally at least one additional network of dopant elements or dopant compounds having elements from groups 1-7b and 8 of the periodic table.
Abstract:
A method for inhibiting corrosion of a substrate by applying to a substrate a corrosion resistant coating comprising a diamond-like solid state material having interpenetrating atomic scale networks of class of diamond-like solid state materials formed from interpenetrating networks comprising a first network of carbon in a diamond-like carbon network stabilized by hydrogen, a silicon network stabilized by oxygen, and optionally at least one network made from dopant elements or dopant compounds containing elements from groups 1-7b and 8 of the periodic table.