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. 26, 2019
Filed:
Mar. 25, 2016
Tokyo Ohka Kogyo Co., Ltd., Kawasaki-shi, JP;
Hirofumi Imai, Kawasaki, JP;
Tomoyuki Ando, Kawasaki, JP;
TOKYO OHKA KOGYO CO., LTD., Kawasaki-Shi, JP;
Abstract
A negative photosensitive composition including an epoxy group-containing resin; and a cationic polymerization initiator containing one or more types of the following cationic polymerization initiators: a compound represented by formula (b0-1) and a compound represented by formula (b0-2), and a cationic polymerization initiator which generates an acid having a pKa of −3 or more. In the formulae, Rto Rare each independently a fluorine atom or an aryl group which may have a substituent, Ris a fluorine atom or a fluorinated alkyl group which may have a substituent, a plurality of R's may be the same as or different from each other, q is an integer of 1 or more, and Q's are each independently a q-valent organic cation.