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. 07, 1993
Filed:
Apr. 01, 1992
Applicant:
Inventors:
Siegfried Scheler, Wiesbaden-Naurod, DE;
Wolfgang Zahn, Eltville, DE;
Axel Schmitt, Walluf, DE;
Gerhard Buhr, Koenigstein, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430193 ; 430190 ; 430191 ; 430192 ; 430165 ; 430166 ; 534555 ; 534557 ;
Abstract
The invention relates to a radiation-sensitive ester which is the condensation product of (a) a compound containing 2 to 6 aromatic hydroxyl groups, (b) a ring-substituted (o-naphthoquinone 2-diazide)-4-sulfonic acid (compound D.sub.1 and (c) an (o-naphthoquinone 2-diazide)-4- or -5-sulfonic acid which is not further substituted (compound D.sub.2) and/or a non-radiation-sensitive organic acid (compound D.sub.0), where the (b):(c) molar ratio is between 0.1:1 and 39:1.