Primed substrate for manufacture of a printed circuit board
OwnerJames M. Taylorinventor
Life of this patent
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Abstract
A primed substrate for manufacture of a printed circuit board. At least part of the substrate is coated with a film formed by contacting a solution containing at least one film forming amine and enough acid to produce a pH of less than about 6.5. The film promotes adhesion of subsequently applied layers by inhibiting substrate oxidation and catalytic polymerization of monomers and polymers at the interface between the substrate and a resist surface by resisting resist contact with the substrate. The film enhances resist adhesion to alloys, copper, or other materials. The acid can be an organic acid, an inorganic acid, or a combination.
Claims14
A primed substrate for manufacture of a printed circuit board, said substrate being coated on at least a portion thereof with a film formed by contacting a solution with said substrate, said solution comprising from about 0.003% to about 3.0% of at least one film forming amine and sufficient acid to produce a pH of less than about 6.5.
Dependencies are inferred from the claim text.