Patent ID: 8680402

Claim:
A multi-layer Flexible Printed Circuit Board (FPCB) for an electronic device, the multi-layer FPCB comprising: a base layer having a top surface and a bottom surface; a first circuit pattern provided on a first region on the top surface of the base layer; a first adhesive layer provided over and in the first circuit pattern; a second circuit pattern provided on a second region on the bottom surface of the base layer; a second adhesive layer provided over and in the second circuit pattern; a first insulating/protecting layer provided on a top surface of the first adhesive layer; and a second insulating/protecting layer provided on a bottom surface of the second adhesive layer; wherein a third region comprises an area on the bottom surface opposite to the first region; wherein a fourth region comprises an area on the top surface opposite to the second region on the bottom surface; and wherein the third and fourth regions are substantially clear of circuit patterns, adhesive layers, and insulating/protecting layers.