Multilayer printed circuit board

Details Multilayer printed circuit board Multilayer printed circuit board

1985-02-26

1987-06-16

Kight, John

Electricity: conductors and insulators

Conduits, cables or conductors

Single duct conduits

528125, 528126, 528128, 528183, 528184, 528186, 528220, 528229, 528338, 528340, 528342, 528345, 528348, 361414, 430283, H05K 114

Patent

active

046737731

ABSTRACT:
In a multilayer printed circuit board comprising an insulating substrate and a plurality of circuit elements provided thereon in layers, each of which is composed of a circuit pattern and an insulating resin layer provided over the circuit pattern, the circuit patterns arranged adjacently to each other being portionwise connected electrically through via at least one hole, the improvement in which said insulating resin layer comprises a photoset resin of an aromatic polyamide having at least 10 molar % of a constitutional unit of the formula (Ia): ##STR1## wherein each of R.sup.1 and R.sup.2 independently is a hydrogen atom or a residue of a reactive organic compound, Ar.sup.1 is a divalent aromatic residue, and Ar.sup.2 is a divalent aromatic residue possessing a photosensitive group.

REFERENCES:
patent: 4397999 (1983-08-01), Ahne et al.
patent: 4496794 (1985-01-01), Darms et al.
patent: 4511757 (1985-04-01), Ors et al.

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