| 摘要 |
PROBLEM TO BE SOLVED: To provide an insulation sheet having excellent handling properties in its uncured state, and giving a cured material excellent in dielectric properties, dielectric breakdown properties, adhesion, and heat resistance. SOLUTION: The insulation sheet comprises (A) a polymer having a≥30,000 weight-average molecular weight, (B1) an epoxy monomer and/or (B2) an oxethane monomer having an aromatic skeleton and having a≤600 weight-average molecular weight, (C) a curing agent of being an acid anhydride having an aromatic skeleton or aliphatic skeleton, its hydrogenated product or its modified material, (D) a curing promoter, and (E) a filler containing (E1) a filler having a dielectric constant of≥100 and having an average particle diameter of 0.01-0.5μm and (E2) a filler having a dielectric constant of≥100 and having an average particle diameter of 0.8-3μm in specific proportions. COPYRIGHT: (C)2010,JPO&INPIT |
