| 摘要 |
PURPOSE:To obtain an almost rectangular copper circuit without contaminating a plating bath by incorporating vinyl monomers, photoinitiator and multielement copolymer obtd. by polymn. in the presence of a chain mobilizing agent having a specified structure. CONSTITUTION:A mixture soln. containing alpha, beta-unsatd. carboxylic acid and acrylate or methacrylate having alkyl groups of 1-20 carbon number is subjected to polymn. in the presence of a chain mobilizing agent expressed by formula I. In formula I, R1 is a group which makes an aromatic hydrocarbon condensed with an imidazole ring in formula, R2 is H, Na, K or -CH2-N-(R3)2, R3 is an alkyl group of 1-10 carbon number. The alpha, beta-unsatd. carboxylic acid gives developing property to a weak alkali soln., and is for example, acrylic acid. This unstad. carboxylie acid is preferably incorporated by 5-40wt.% of the total amt. for preparation of the multielement copolymer. |
