EPOXY RESIN COMPOSITION, PREPREG, METAL CLAD LAMINATE AND MULTILAYER PRINTED WIRING BOARD

摘要

An epoxy resin composition that excels in drillability, moldability and interlayer adhesion, ensuring favorably performing of desmear treatment. The epoxy resin composition comprises an epoxy resin, a hardening agent and an inorganic filler. As the epoxy resin, use is made of an epoxy resin with dicyclopentadiene skeleton or an epoxy resin with novolac skeleton. As the hardening agent, use is made of a phenolic resin hardening agent with biphenyl skeleton. As the inorganic filler, use is made of aluminum hydroxide and spherical silica surface-treated with epoxysilane. The content of spherical silica based on the total amount of the epoxy resin composition is in the range of 20 to 50 mass%. The content of aluminum hydroxide based on the total amount of spherical silica is in the range of 2 to 15 mass%.