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. 14, 2000
Filed:
Mar. 30, 1998
Toshiaki Aoai, Shizuoka, JP;
Satoshi Takita, Shizuoka, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
Provided is a positive photosensitive composition which has high photosensitivity, is capable of giving an excellent resist pattern, and changes little with time after exposure. The positive photosensitive composition comprises a resin having group(s) capable of decomposing by the action of an acid to enhance solubility of the resin in an alkaline developing solution and a compound represented by formula (Ia) or (Ib) which is capable of generating a sulfonic acid upon irradiation with actinic rays or a radiation: ##STR1## wherein R.sub.1 to R.sub.3 each represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a hydroxy group, a halogen atom, or a group represented by --S--R.sub.4, where R.sub.4 represents an alkyl group or an aryl group; X.sup.- represents the specific anion of a benzenesulfonic, naphthalenesulfonic, or anthracenesulfonic acid; and l, m, and n represents an integer of 1 to 3.