Patent ID: 8664534

Claim:
A printed circuit board comprising: a flexible substrate and conductors formed on at least one side of the flexible substrate, the printed circuit board having a flexible region that bends and non-flexible regions that do not bend, the non-flexible regions having the flexible region therebetween, the flexible substrate being the only substrate and being provided in each of the flexible region and the non-flexible regions, the conductors including first conductors provided in the non-flexible regions and a second conductor provided in the flexible region, the first conductors, in a cross-section of the printed circuit board across the flexible and non-flexible regions, being separated from the second conductor, wherein a total thickness of the second conductor, formed in the flexible region, is 1-30 μm and a total thickness of the first conductors, formed in the non-flexible regions, is 30-150 μm, wherein the flexible substrate contains a fiber base material and the fiber base material is a glass cloth with a thickness of no greater than 50 μm, and wherein the flexible substrate comprises a thermosetting resin composition, and the thermosetting resin composition comprises a siloxane-modified polyamideimide.