Coating processes – With pretreatment of the base – Preapplied reactant or reaction promoter or hardener
Patent
1992-04-27
1994-03-01
Beck, Shrive
Coating processes
With pretreatment of the base
Preapplied reactant or reaction promoter or hardener
427305, 4274431, 205187, 205211, B05D 100
Patent
active
052905977
ABSTRACT:
Method of producing a polyimide layer having improved adhesion to a metal layer thereon. A halogenated polyamic acid is sprayed, partially cured, degreased and oxidized to form a partially cured polyimide layer, which is then electrolessly plated with a primary metal layer and then final cured into the polyimide layer. Electrolessly or electrolytically applied secondary metal layers are then deposited on the primary layer, 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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Baumgartner Charles E.
Scott Lisa R.
Beck Shrive
Dang Vi Duong
General Electric Company
Pittman William H.
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