The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 1987
Filed:
Feb. 26, 1985
Ube Industries, Ltd., Ube, JP;
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.