Film, method for producing film, metal-clad laminate, and coated metal conductor
AssigneeAGC Inc.
InventorsWataru Kasai, Tomoya Hosoda, Atsumi Mitsunaga, Tatsuya Terada, Sota Yuki
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Abstract
A heat-resistant film that has high adhesion and low warping, a method for producing the film, and a metal-clad laminate and a coated metal conductor, using the film. The film includes an aromatic polyimide base film, and a layer containing a polymer having units based on tetrafluoroethylene and units based on a perfluoro(alkyl vinyl ether) and an aromatic polymer, formed on each side of the base film.
Claims14
A film comprising an aromatic polyimide base film, and a layer containing (i) a polymer having units based on tetrafluoroethylene and units based on a perfluoro(alkyl vinyl ether) and (ii) an aromatic polymer, formed on each side of the base film,
- wherein in the layer, an amount of the aromatic polymer (ii) to a total amount of the polymer (i) and the aromatic polymer (ii) is 10 mass % or less.
A method for producing a film, which comprises applying a powder dispersion containing a powder of a polymer having units based on tetrafluoroethylene and units based on a perfluoro(alkyl vinyl ether), an aromatic polymer or its precursor, and a liquid medium, to the surface of an aromatic polyimide base film, followed by heating to form a layer, thereby to obtain a film having the layer formed on each side of the base film,
- wherein in the layer, an amount of the aromatic polymer to a total amount of the polymer having units based on tetrafluoroethylene and units based on a perfluoro(alkyl vinyl ether) and the aromatic polymer is 10 mass % or less.
Dependencies are inferred from the claim text.