LAMINATE FOR PRINTED WIRING BOARD

摘要

PROBLEM TO BE SOLVED: To provide a laminate in which the adhesive strength between copper foil layer and insulating base material is high by using SPS (resin composition containing polymer of styrene having syndiotactic structure) of superior dielectric property. SOLUTION: A laminate is mainly comprised of an SPS resin 3 and an insulating base material of fibrous filler with a copper foil layer 1 on at least one side. Several copper particles 2 protrude from the copper foil layer 1 into the insulating base material. The diameter of the copper particles 2 to 0.1-5μm. More than 50% of the particles are spaced 1μm or less.