| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive flexible printed wiring board which includes a coiled circuit with high communication performance and in which a magnetic material is less likely to scatter.SOLUTION: A flexible printed wiring board comprises a first coil layer constituting a first coiled circuit, a first insulating layer made of a synthetic resin, a magnetic material layer including a ferromagnetic material, a second insulating layer made of a synthetic resin, and a second coil layer constituting a second coiled circuit in this order. The first coil layer and the second coil layer are electrically connected. The magnetic material layer comprises a magnetic sheet including the ferromagnetic material and a reinforcing sheet which is made of a synthetic sheet and into which the magnetic sheet fits. The magnetic sheet may be disposed in at least a composite projection region between a first coiled circuit occupation region and a second coiled circuit occupation region. The magnetic material layer may include a plurality of magnetic sheets to be dividedly disposed. |
