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:
Nov. 16, 2004
Filed:
May. 02, 2002
Showa Denko K.K., Tokyo, JP;
Abstract
The photosensitive composition of the present invention comprises a photocurable component containing a urethane (meth)acrylate compound (A) having a carboxyl group; a thermosetting resin (C); a photopolymerization initiator (D); and a thermopolymerization catalyst (E); and the above-mentioned photocurable component further contains at least one of (B) a compound having an ethylenically unsaturated group, excluding the component (A), and an epoxy (meth)acrylate compound (F) having a carboxyl group. Therefore, the photosensitive composition is suitable for use as an insulating protective coating film for printed circuit boards. Since the cured film made of the photosensitive composition of the present invention is particularly superior in pliability, curling does not occur even when used for a thin circuit board. Therefore, the cured film is best suited for use in an FPC board.