A negative-acting photoimageable composition useful as a primary imaging resist in the manufacture of printed circuit boards comprises an acid-functional binder polymer, a photopolymerizable component, and a photoinitiator chemical system, in which all or a portion of the photopolymerizable component comprises a (meth)acrylate functional urethane oligomer, wherein the (meth)acrylate functionality is separated from the urethane linkage by at least two alkylene oxide groups and at least one ring-opened lactone group for improved flexibility, tenting strength, fine line adhesion, developer scumming, coupled with unexpectedly improved resistance to processing chemicals, such as alkaline developing solutions, acid etching solutions, and acid plating baths, and stripping ability in strong alkaline aqueous stripping solutions.
一种可负作用光成像组合物,可用作印刷电路板制造中的主成像抗蚀剂,该组合物包括酸官能团粘合剂聚合物、可光聚合组分和光
引发剂化学体系,其中可光聚合组分的全部或部分包括(甲基)
丙烯酸酯官能团聚
氨酯低聚物、其中,(甲基)
丙烯酸酯官能团通过至少两个环氧亚烷基和至少一个开环内酯基团与聚
氨酯链节分离,从而提高了柔韧性、抗张力、细线附着力、显影剂浮渣性,并意外地提高了对加工
化学品(如碱性显影溶液、酸蚀刻溶液和酸电镀浴)的耐受性,以及在强碱性
水性剥离溶液中的剥离能力。