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:
Jul. 10, 2012
Filed:
Oct. 30, 2008
Applicants:
Katsumasa Yamamoto, Hyogo, JP;
Hirofumi Yamaguchi, Hyogo, JP;
Michio Suzuki, Hyogo, JP;
Inventors:
Assignee:
Sumitomo Seika Chemicals Co., Ltd., Kako-gun, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03F 7/004 (2006.01); G03F 7/028 (2006.01); C07D 409/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A photoacid generator, which shows very high sensitivity in the near ultraviolet range of about 300 to 400 nm, and also can remarkably increase a reaction rate of a photoreactive composition using the same, and a photoreactive composition which can initiate the reaction even by irradiation with near ultraviolet light within a short time and also can obtain a desired reaction product. A dithienyl sulfide disulfonium salt represented by the formula (A1): a dithienyl sulfide sulfonium salt represented by the formula (B1): and a phenylthiothiophene sulfonium salt represented by the formula (C1):