Substrates coated with a stick, and low voltage compliant polyarylate polymer film formed in accordance with the principles of the present invention is useful in various industrial and commercial applications. These applications include the coating of items such as kitchen utensils, with features such as low pollution, high temperature stability and durability and abrasion resistance are important. Graphically, one of the other great this coating is to cover the surfaces of the reaction chamber of the plasma-assisted etching system as a versatile reactive sputtering etching described in the United States. Ben 4,298,443. The contamination of the wafer during the etching process is therefore greatly reduced.
Polyarylate polymers are described in various publications such as polyesters of diphenols and dicarboxylic acids. In this regard, see, for example, new commercial polymers, 1969-1975, revised edition by HG Elias, Gordon, p. 91, 1977, Modern Plastics Encyclopedia, McGraw-Hill, p. 50, 55, 1981, and on the design and plastic, manual office 1982, p. 77-78.
Numerous polyarylate polymers are available. One of the inexpensive, such as a polymer, which is named Ardelia, and available in a variety of specific types named Ardelia 100, 209 and Ardelia Ardelia 213, is made and is available in pellet form by Union Carbide, Bound Brook, NJ (Ardelia polymer is a trademark of Union Carbide.) Traditionally, Ardelia polymer pellets covers many commercial producers, who by molding or extruding, convert the pellets in the form of strips, tapes, discs, rods, plates, etc. One source of this standard is converted Ardelia, for example, in the form of an eighth inch thick, the Westlake Plastics, Lenni, Pa.
Polyarylate other polymers are available in their respective manufacturers in pellet form and are usually treated with commercial manufacturers to form plaques, plates, rods, tapes, etc. Other polymers include U-Polymer made by Unitika Ltd., London, England and polymers Durel made by Hooker Chemical and Plastics Corporation, Niagara Falls, NY (Durel polymer is a registered trademark of Hooker Chemical).
In accordance with the principles of the present invention is a polyarylate polymer coating applied to a substrate, for example, aluminum, magnesium, titanium, stainless steel, ceramic, plastic or glass. Heritage, the focus is redirected to such a coating applied to a substrate made of a metallic material. For an etching by sputtering, the system of the type specified above, the substrate of interest includes a mounting plate member made tray, for example, aluminum. Therefore, the overall objective of the procedure described below, in some cases can be particularized to specify a detailed method specially adapted for coating polymer A polyarylate in such a member of aluminum plate.
Based on a major feature of the present invention discovered, that an applicant is available suitable solvent for dissolving polyarylate polymers. Before specifying the solvent, the focus is first to benefit from the different stages created by the applicant in preparing the substrate surface to be coated. These preparation steps are designed to ensure that the applied coating adhere to the substrate, particularly reliably.
Wash, rinse and abrade the surface of the substrate is desirable. For an aluminum surface, proper washing includes alcohol 1,1,1-trichloroethane, gasoline or industrial. Subsequently, standard abrasion with glass beads is effective in removing the oxide layer. This is usually followed by a step running using aluminum oxide or silicon carbide powder. Rinse the surface with, for example, 1,1,1-trichloroethane is then performed.
Subsequently, a specific feature of this invention, it is worth before finishing the surface of the polyarylate polymer substrate form a closed surface of the intermediate layer. In one embodiment, the middle layer of a porous material, which serves the anchoring effect of the polymer coating material applied to the substrate. Excellent adhesion to the plastic coating is thus achieved.
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