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:
Dec. 30, 1997
Filed:
Jan. 31, 1997
Hayato Ohno, Kanagawa, JP;
Taku Nakao, Kanagawa, JP;
Hisanobu Harada, Kanagawa, JP;
Shinichi Hidesaka, Kanagawa, JP;
Hidekatsu Kohara, Kanagawa, JP;
Toshimasa Nakayama, Kanagawa, JP;
Tokyo Ohka Kogyo Co., LTD., Kanagawa, JP;
Abstract
A positive photoresist coating solution comprising (a) an alkali-soluble resin, (b) a quinone diazide group-containing compound, and (c) an organic solvent in an amount sufficient for dissolving said (a) and (b) components, wherein said organic solvent contains (i) propylene glycol monopropyl ether and (ii) 2-heptanone. The solution of the present invention exhibits excellent coating ability, sensitivity, thermostability, focal depth range, shape-profiling ability, and the like.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile