| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polymer composition having a high sensitivity and being capable of being readily developed with an aqueous alkali solution by including a copolymer of a vinyl compound having an acidic group with a tertiary amine compound having a double bond and a photopolymerization initiator. SOLUTION: The acid group of the copolymer used is a carboxyl, sulfo, or phosphonic group. The comonomer component is desirably methyl methacrylate. Especially, the copolymer is desirably one comprising styrene, methyl methacrylate, and methacrylic acid. The resin has an acid value of 50-150 mgkOH/g and a weight-average molecular weight of 5,000-50,000, The tertiary amine compound is exemplified by N,N-dimethylaminoethyl methacrylate and is used in an amount of, desirably, 0.5-2.5 mol per mol of the acid groups of the copolymer. The photopolymerization initiator is exemplified by 2- hydroxy-2-methyl-1-phenylpropan-1-one and is used in an amount of 0.05-10 wt.% based on the composition.
|
