Method of producing modified polyimide layer having improved adh

Coating processes – With pretreatment of the base – Preapplied reactant or reaction promoter or hardener

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427305, 427306, 427341, 427380, 427404, 4274121, 4274431, 205167, 205169, B05D 300

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052885194

ABSTRACT:
Method of producing a modified polyimide layer to improve adhesion of a metal layer thereon. A limited quantity of water is added to a halogenated polyamic acid to form a reaction product, which is then sprayed, degreased, oxidized and cured into a modified polyimide layer. The chemically modified surface by the aforementioned method is then electrolessly plated with a primary metal layer followed by one or more electrolessly or electrolytically applied secondary metal layers until the metal layer of a desired thickness is attained. The present invention further discloses articles such as an EMI shielded enclosure and an insulated mold surface, having metal layers as an EMI shield and an insulating surface, respectively.

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