Process for the preparation of polyimide film

Coating processes – With post-treatment of coating or coating material – Heating or drying

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156326, 156329, 156330, 264216, 264236, 26433119, 26433121, 427387, 4274121, 4274191, 4274342, 428447, 4284735, B05D 302, B29C 7102

Patent

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047973072

ABSTRACT:
A process for the production of a polyimide film having an increased adhesiveness which includes the steps of: evenly coating a surface treating solution which contains a heat-resistant surface treating agent of aminosilane type, epoxysilane type or titanate type in an amount not less than 0.5 wt. % on a surface of a solid film comprising an aromatic polymer composition which contains 100 parts by weight of an aromatic polyamic acid and 5-150 parts by weight of an organic polar solvent and heating the solid film having the coated surface treating solution at a temperature of 100.degree.-600.degree. C., to imidize the polyamic acid constituting the solid film as well as to dry the film.

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Spaulding, E. C., Improving Adhesion of Silicone Rubber to Substrates, IBM Technical Disclosure Bulletin, vol. 11, No. 7 (Dec. 1968), p. 704.
Sacher, E. et al., Improving Bonding Strength of Polyimide-to-Silicon Wafers, IBM Technical Disclosure Bulletin, vol. 20, No. 6 (Nov. 1977), p. 2161.

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