Patent ID: 6558867
Filing Date: 2003-05-06
Classification: G03F

Abstract:
A single layer lift-off resist composition comprising 100 parts by weight of a novolac resin, 25 to 45 parts by weight of a quinonediazidosulfonate photosensitive agent, and 34 to 60 parts by weight of an aromatic hydroxy compound having at least one phenolic hydroxyl group in which the phenolic hydroxyl group is partially acylated, represented by the following general formula (1): wherein m is an integer of 0 to 2, n is an integer of 0 to 2, with the proviso that m is 1 or 2 when n is 0;R1 to R6 are independently hydrogen, methyl, a group of the following formula (2), or a group of the following formula (3); when n is 0 and m is 1, A is hydrogen, methyl or a group of the following formula (2); when n is 0 and m is 2, one of A is methylene or a group of the following formula (4), and the other of A is hydrogen, methyl or a group of the following formula (2); when n is 1, A is methylene or a group of the following formula (4); when n is 2 and m is 1, A is methine or a group of the following formula (5); and when n is 2 and m is 2, one of A is methylene or a group of the following formula (4), and the other of A is methine or a group of the following formula (5), with the proviso that at least one of R1 to R6 and A has a structure of a benzene ring having a hydroxyl group added thereto, wherein p, q, r and s are integers of 0 to 3, and t is an integer of 1 to 3.