| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin-impregnated base material for a circuit board which base material can be produced constantly, and can be used in response to a high-density circuit board. SOLUTION: The resin-impregnated base material for the circuit board is made by impregnating a nonwoven fabric formed on a carrier sheet made of aromatic group liquid crystal polyester fibers with a matrix resin made of an aromatic group liquid crystal polyester, and drying the nonwoven fabric. It is desirable that the carrier sheet be a metal foil for a circuit board, that the weight per square meter of the nonwoven fabric made of the aromatic group liquid crystal polyester fibers be 6 to 10 g/m<SP>2</SP>, and that the melting point of aromatic group liquid crystal polyester fibers be 290°C or lower. COPYRIGHT: (C)2007,JPO&INPIT |
