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:
Feb. 01, 2005
Filed:
Jul. 23, 2001
Applicants:
Shigeyuki Iwasa, Tokyo, JP;
Katsumi Maeda, Tokyo, JP;
Kaichiro Nakano, Tokyo, JP;
Etsuo Hasegawa, Tokyo, JP;
Inventors:
Shigeyuki Iwasa, Tokyo, JP;
Katsumi Maeda, Tokyo, JP;
Kaichiro Nakano, Tokyo, JP;
Etsuo Hasegawa, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03F 7031 ; G03F 7039 ; C07D40900 ; C07D31900 ; C07D32100 ;
U.S. Cl.
CPC ...
Abstract
Photoacid generators comprising sulfonium salt compounds represented by the following general formula (2) wherein Rand Rrepresent each an alkyl group optionally having oxo, or Rand Rmay be cyclized together to form an alkylene group optionally having oxo; R, Rand Rrepresent each hydrogen or a linear, branched, monocyclic, polycyclic or crosslinked cyclic alkyl group; and Yrepresents a counter ion.