SHEET FOR REINFORCING FLEXIBLE PRINTED WIRING BOARD, AND FLEXIBLE PRINTED WIRING BOARD USING SAME

摘要

PROBLEM TO BE SOLVED: To provide a sheet for reinforcing a flexible printed wiring board which has superior reflow heat resistance, mechanical characteristics, forming workability, etc., and is manufactured at low cost with high productivity, and the flexible printed wiring board using the same.;SOLUTION: The sheet for reinforcement used while stuck on the flexible printed wiring board is obtained by further subjecting to biaxial stretching processing a sheet obtained by extrusion-molding a crystalline thermoplastic resin of ≥120°C in softening start temperature Tg measured by thermomechanical analysis (TMA)in a method described in "5.17.1 TMA methods" of JIS C 6481:1996, and a plate type inorganic filler, especially, a plate type inorganic filler of ≥10 in aspect ratio. The sheet for reinforcement is stuck on a predetermined place of the flexible printed wiring board (1) to form a reinforcing layer (2).;COPYRIGHT: (C)2010,JPO&INPIT