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US07910631B2 Photosensitive resin composition and flexible printed wiring circuit board having insulative cover layer formed of photosensitive resin composition 有权
光敏树脂组合物和具有由感光性树脂组合物形成的绝缘覆盖层的柔性印刷布线电路板

Photosensitive resin composition and flexible printed wiring circuit board having insulative cover layer formed of photosensitive resin composition
Abstract:
A photosensitive resin composition which is excellent in flame resistance, resolution and flexibility, and substantially free from deposition of components thereof to prevent contamination of a product. The photosensitive resin composition comprises:(A) a cyclic phosphazene compound represented by the following general formula (1): wherein at least one of the Rs is an organic group having the urethane(meth)acrylate structure represented by the following general formula (2) and n is a positive number of 2 to 5: wherein R1 is a hydrogen atom or a methyl group; (B) a carboxyl-containing linear polymer obtained by polymerizing an ethylenically unsaturated compound through addition polymerization; (C) an epoxy resin; (D) an ethylenically unsaturated group-containing polymerizable compound; and (E) a photopolymerization initiator; wherein the cyclic phosphazene compound (A) is present in a proportion of 5 to 30 wt % based on the total weight of the composition.
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