Patent ID: 7655380

Claim:
Polymeric material, containing a latent acid, which can be converted to an acid by irradiation by a laser, and optionally further ingredients, wherein the latent acid is of formula wherein the ring A can contain one or more hetero atoms and/or can contain an anelated ring, R 1 is hydrogen, alkyl, alkenyl, aryl, R 2 , R 3 , R 4 and R 5 independently of each other are hydrogen or a functional substituent, and R stands for -Z 1 -Q 1 , or -Z 2 -Q 2 , wherein Z 1 is a single bond, S, NH or O, and Q 1 is a heterocyclic ring system having from 5 to 9 ring atoms selected from C, S, O and N, with at least 2 carbon atoms in the ring system, which may be substituted one to three times with C 1 -C 4 alkyl or hydroxy, mercaptobenzoxazole, mercaptobenzthiazole, and wherein Z 2 stands for C 1 -C 4 alkylene, which can be substituted by C 1 -C 4 alkyl or Q 3 , wherein Q 3 stands for phenyl which can be substituted one to three times with C 1 -C 4 alkyl, hydroxy, C 5 -C 8 cycloalkyl and/or a heterocyclic ring system having from 5 to 9 ring atoms selected from C, S, O and N, with at least 2 carbon atoms in the ring system, and Q 2 stands for a heterocyclic ring system having from 5 to 9 ring atoms selected from C, S, O and N, with at least 2 carbon atoms in the ring system, with the proviso that the hydrogen atom at the C-atom in α-position to R can be split off by irradiation and the heterocyclic ring systems of Q 1 or Q 2 are the optionally substituted heterocyclic residues pyrrolidino, piperidino, morpholino, benzthiazole, 1,2,4-triazole, imidazole, pyrazole, tetrazole, thiazolin-2-thione, imidazolin-2-thione, N-methyl-imidazolon-2-thione and 5-(3-phenyl-1,3,4-thiadiazol-2(3H)-thione), 2-pyridine, 4-pyridine, 3-pyridazine, 2-pyrimidine, 2-thiazole, 2-thioazoline, 3-(1,2,4-triazole) and 5-(2-mercapto-1,3,4-thiadiazole), naphthyridine, purine and pteridine residues, benzimidazole, benzotriazole, benzoxazolin-2-thione, 2-benzoxazole, mercaptobenzoxazol, mercaptobenzthiazol or quinolinyl.