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:
Mar. 10, 1998
Filed:
Mar. 04, 1997
Sumitomo Bakelite Company Limited, Tokyo, JP;
Abstract
The present invention provides a rein composition comprising the following components (a), (b), (c), (d) and (e) as essential components; and an excellent multilayer printed circuit board obtained by using the resin composition: (a) a polyfunctional epoxy resin having an epoxy equivalent of 120-500, (b) a modified phenol novolac obtained by reacting 20-60 mole % of the phenolic hydroxyl groups of a phenol novolac obtained by condensing a phenol compound with formaldehyde in the presence of an acidic catalyst, with a glycidyl group-containing acrylate or methacrylate, (c) an epoxy acrylate or epoxy methacrylate compound, (d) a diluent consisting of a polyfunctional monomer having a plurality of photosensitive functional groups or a polyfunctional monomer having a photosensitive functional group and a heat-sensitive functional group, or a diluent consisting of a combination of the two monomers, and (e) a photopolymerization initiator.