Method and solution for treating fluorocarbon surfaces
OwnerSyed M. Hasaninventor
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Abstract
A method and solution to activate and metallize the surface of a fluorocarbon material, suitable for circuit boards is disclosed. The surface of fluorocarbon materials is both hydrophobic and oleophobic, and highly inert and repellent to oils, dyes, adhesive and coatings. The method of the present invention makes such fluorocarbon materials wettable with metallizing solutions and chemicals, and also bondable with adhesives and coatings. The method comprises contacting said fluorocarbon surface with a mixture comprising a cyclic amide, a quaternary ammonium compound, a cationic or nonionic surfactant, a glycolether and an organic acid.
Claims23
A method of activating a fluorocarbon surface to render such surface active to metal coating and/or organic adhesives or inks, which comprises contacting said surface with a mixture comprising a cyclic amide, a quaternary ammonium compound, a cationic or nonionic surfactant, a glycol ether and an organic acid.
A solution for activating a fluorocarbon surface to render such surface active to metal coating and/or organic adhesives or inks, which comprises a mixture comprising a cyclic amide, a quaternary ammonium compound, a cationic or nonionic surfactant, a glycol ether and an organic acid.
A circuit board formed by the steps of:
- drilling holes through a fluorocarbon substitute;
- activating a surface of the substrate, including hole sidewalls, with a mixture comprising a cyclic amide, a quaternary ammonium compound, a cationic or nonionic surfactant, a glycol ether and an organic acid;
- electroless plating the activated surface with copper;
- electroplating the electroless plated surface;
- printing an image of desired interconnection onto the electroplated surface;
- and
- etching unwanted copper from the image printed surface.
Dependencies are inferred from the claim text.