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:
Jan. 18, 2000
Filed:
Apr. 28, 1997
Toshio Awaji, Kawanishi, JP;
Nobuaki Otsuki, Suita, JP;
Motohiro Arakawa, Mino, JP;
Hiromichi Tanaka, Takatsuki, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
The photo-curable liquid solder resist ink composition of the present invention mainly comprises a photo-polymerizable resin having sufficient molecular weight and (meth)acryloyl groups which are imparted by both of introduction of (meth)acryloyl groups into a novolak-type epoxy resin having 4 or more of benzene nuclei and polymerization using a chain-extension agent. The composition is useful for a photo-curable type resist, since it can produce a coated film excellent in tack free characteristic and resolution, and can produce a cured film excellent in heat resistance, adhesiveness, and chemical resistance. In addition, by reacting with an acid anhydride, development with alkalis becomes possible.