POSITIVE TYPE RADIOSENSITIVE MIXTURE AND RADIOSENSITIVE COPYING MATERIAL CONTAINING SAID COMPOUND

摘要

PURPOSE: To make a radiation sensitive mixture usable for a lithographic printing plate having high printing ability or as a heat resistant photoresist by incorporating a combination of a high mol.wt. binder soluble in an aq. alkali soln. but insoluble in water with specified compds. CONSTITUTION: This radiation sensitive mixture contains a combination of a high mol.wt. binder soluble in an aq. alkali soln. but insoluble in water with 1,2-quinone diazide or a compd. forming a strong acid when exposed to chemical rays and a compd. contg. a cleavable C-O-C bond. A polymer having units represented by formula I is contained as the binder. In the formula I, R1 is H, halogen, etc., each of R2 -R4 is H, alkyl, etc., each of R5 -R7 is H, halogen, etc., X is a group of atoms required to form a carbocyclic arom. ring and (n) is 1, 2 or 3. This mixture is usable as a photoresist or for lithography.