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:
Aug. 26, 1997
Filed:
Dec. 27, 1995
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
A photosensitive resin composition comprising an alkali-soluble resin, a quinonediazide type photosensitive compound and a solvent, in which the quinonediazide type photosensitive compound contains a quinonediazide sulfonic acid ester of a polycondensate (d) of at least one phenolic compound (a) of the formula (A) with at least one hydroxy aromatic aldehydes (b) of the formula (B) and at least one carbonyl compounds (c) of the formula (C), and the mixing ratio ((b)/(c) mol ratio) of the hydroxy aromatic aldehydes (b)/the carbonyl compounds (c) is from 1/99 to 99/1, and the polycondensate (d) has a weight average molecular weight of from 600 to 2,000 in terms of polystyrene calculation: ##STR1## (wherein R.sup.1 is an alkyl group having a carbon number of from 1 to 4, an alkoxy group having a carbon number of from 1 to 4 or a hydroxyl group, R.sup.2 is an alkyl group having a carbon number of from 1 to 4 or an alkoxy group having a carbon number of from 1 to 4, R.sup.3 and R.sup.4 are respectively a hydrogen atom, an alkyl group having a carbon number of from 1 to 4, an aryl group or an aralkyl group, l is an integer of from 0 to 3, m is an integer of from 0 to 4, n is an integer of from 1 to 5, and the total number of m and n is not more than 5, provided that plural R.sup.1 or R.sup.2 may be respectively the same or different when l or m is an integer of at least 2).