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. 06, 1988
Filed:
Nov. 24, 1986
Applicant:
Inventors:
Hans Ruckert, Wiesbaden-Naurod, DE;
Joachim Knaul, Gehrden, DE;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ; G03C / ;
U.S. Cl.
CPC ...
430270 ; 430142 ; 430171 ; 430193 ; 430189 ; 430176 ; 430192 ; 430926 ; 430326 ; 430292 ; 430313 ;
Abstract
A positive-working radiation-sensitive mixture is described that contains (a) a radiation-sensitive compound which forms a strong acid under the action of actinic radiation, (b) a compound with at least one C--O--C bond cleavable by acid, (c) a binder which is insoluble in water but soluble in aqueous-alkaline solutions, and (d) a polymethine dye. The polymethine dyes used are hemioxonol dyes or symmetrical cyanine dyes. In the light-sensitive mixture, these dyes effect high sensitization and high image sharpness contrast which, in addition, is substantially irreversible.