One-package type photosolder resist composition developable with aqueous alkali solution and method for production of printed circuit board by use thereof
申请人:TAIYO INK MANUFACTURING CO. LTD.
公开号:EP0747770A2
公开(公告)日:1996-12-11
A one-package type photosolder resist developable with an aqueous alkali solution and suitable for use as a solder resist for a printed circuit board is disclosed. The composition comprises (A) a copolymeric macromolecular compound containing at least one free carboxyl group in the molecular unit thereof or (A') a copolymeric macromolecular compound containing at least one free carboxyl group and at least one photoreactive unsaturated group in the molecular unit thereof and assuming a solid state at normal room temperature, (B) a diluent including a polyfunctional unsaturated compound assuming a liquid state at normal room temperature and/or an organic solvent, (C) a photopolymerization initiator, (D) a vinyltriazine compound or a derivative thereof, and (E) an inorganic filler. A process for forming a solder resist on a printed circuit board having a circuit preparatorily formed thereon comprises the steps of applying to the surface of said printed circuit board the one-package type photosolder resist composition mentioned above, drying the applied layer of said composition, selectively exposing the dried layer to actinic radiation according to a prescribed pattern, developing the unexposed area of said layer with an aqueous alkali solution thereby forming a solder resist pattern, and finally curing said resist pattern by exposure to actinic radiation.
本发明公开了一种可使用碱水溶液显影并适合用作印刷电路板阻焊剂的单组分型光阻。该组合物包括 (A) 共聚高分子化合物,其分子单元中至少含有一个游离羧基,或 (A') 共聚高分子化合物,其分子单元中至少含有一个游离羧基和至少一个光活性不饱和基团,在常温下呈固态、(B) 稀释剂,包括在常温下呈液态的多官能团不饱和化合物和/或有机溶剂; (C) 光聚合引发剂; (D) 乙烯基三嗪化合物或其衍生物;以及 (E) 无机填料。在印刷电路板上形成阻焊层的工艺包括以下步骤:将上述单组分型光阻组合物涂在印刷电路板的表面上,干燥涂有上述组合物的层,按照规定的模式有选择地将干燥层暴露在光辐射下,用碱水溶液显影上述层的未暴露区域,从而形成阻焊层图案,最后通过暴露在光辐射下固化上述阻焊层图案。