| abstract |
(57) [Summary] [Problem] An insulating material composition that retains sufficient flame retardancy even in a system containing no halogen element, ensures good embedding in an inner layer circuit, and is excellent in heat resistance and reliability. The purpose was to provide things. By using this insulating material composition, a metal foil with an insulating material, an insulating material with a double-sided metal foil, and a metal-clad laminate that excel in flame retardancy, heat resistance, and reliability and can meet the requirements of environmental protection are produced. It becomes possible to do. SOLUTION: An insulating material composition containing thermosetting resin, electrically insulating whiskers and silicone powder as essential components is used. |