POLYAMIC ACID VARNISH, POLYIMIDE VARNISH, METHOD FOR PRODUCING THESE, AND CONNECTION STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide varnish excellent in storage stability and exhibiting preferable adhesiveness not only for the surface of a fluorinated resin not implemented of modifying treatments such as excimer laser irradiation, but also for the surfaces of polyolefin and polyimide.

SOLUTION: The polyimide varnish includes polyimide obtained by polycondensation cyclization of an acid dianhydride and a diamine, a fluorinated resin and an organic solvent dissolvable of these. The product obtained by polycondensation cyclization of the acid dianhydride and the diamine in a fluorinated resin solution obtained by dissolving the fluorinated resin in the organic solvent is used as the polyimide.

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