Being production manner of the flexible printed wiring board which uses the flexible printed wiring board null roll

摘要

PPROBLEM TO BE SOLVED: To provide a method for manufacturing flexible printed wiring boards which can manufacture flexible printed wiring boards of uniform quality and excellent durability against bending without complicated work using a roll-to-roll method and with excellent productivity and quality stability, and a flexible printed wiring board of excellent durability against bending even when the wiring density of conductor patterns at bending portions is high. PSOLUTION: The method for manufacturing flexible printed wiring boards comprises a first film-delivering step, a positioning step for positioning a coverlay film, a pre-bonding step for sequentially pre-bonding the coverlay film, a second film-delivering step, a thermo-compression bonding step for sequentially thermo-compression-bonding the coverlay film, and a bonding-layer curing step for curing the bonding layer by heat treatment. The flexible printed wiring board has such a construction in which the thicknesses of the bonding layers are almost the same on the upper-face side and the lower-face side of the conductive patterns 4 in bending portions in installing into an electronics apparatus. PCOPYRIGHT: (C)2006,JPO&NCIPI