Surface treatment of polyimide film and polyimide film having a thin metal layer
AssigneeUbe Industries, Ltd.
InventorsShozo Katsuki, Toshihiko Anno, Osamu Nakayama, Hiroaki Yamaguchi
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Abstract
A method of surface treating a polyimide film to impart improved adhesion to metal which comprises treating the surface of a polyimide film having a biphenyltetracarboxylic acid component by contact to a solution containing potassium permanganate and/or sodium permanganate and potassium hydroxide and/or sodium hydroxide and treating said surface with an acid.
Claims8
A method of surface treating a polyimide film to impart improved adhesion to metal which comprises treating the surface of a polyimide film having a biphenyltetracarboxylic acid component by contact to a solution containing at least one of potassium permanganate and sodium permanganate and at least one of potassium hydroxide and sodium hydroxide and treating said surface with an acid.
Dependencies are inferred from the claim text.