Process for producing molding for precision fine-line circuit
AssigneePolyplastics Co., Ltd.
InventorsYoshiharu Suzuki, Tomoyuki Aketa
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Abstract
A molding capable of forming a precision fine-line circuit by the substractive method is produced by an improvement that a molding prepared by molding a liquid-crystal polyester resin composition comprising a melt-processable polyester (liquid-crystal polyester) capable of forming an anisotropic molten phase and an inorganic filler added thereto is etched and then treated to form a metallic coating on the surface thereof by sputtering, ion plating or vacuum deposition.
Claims21
An improved process for producing a metal coated molding capable of forming a precision fine-line circuit by the substractive method comprising providing a base molding formed from a composition comprising (a) a melt-processable polyester which is capable of forming an anisotropic melt phase and (b) an inorganic filler in a concentration of approximately 5 to 80 percent by weight based upon the total weight of the composition;
- etching at least a portion of said base molding;
- and applying a metallic surface coating having line and space widths of 0.25 mm or below and a peeling strength of at least one kg/cm to said etched portion of said base molding by a dry metal coating technique selected from the group consisting of sputtering, ion plating, and vacuum deposition while maintaining said base molding at a temperature of approximately 20.degree. to 45.degree. C., in a reduced pressure chamber.
Dependencies are inferred from the claim text.