Patent ID: 9173284
Filing Date: 2015-10-27
Classification: H01B,H05K

Abstract:
1. A flexible circuit board with a planarized cover layer structure, comprising: a substrate, which comprises a first surface and a second surface; a conductor layer, which is bonded to the first surface of the substrate, the conductor layer comprising a plurality of extended conductive signal lines, the conductive signal lines being spaced from each other by a predetermined distance so as to define a separation area between adjacent ones of the conductive signal lines; a first adhesive layer, which is formed on a surface of the conductor layer; an insulation cover layer, which is laminated through the first adhesive layer on the surface of the conductor layer; and a first metal layer disposed on the insulation cover layer; wherein the separation areas between the conductive signal lines of the conductor layer are respectively formed with a filling layer, whereby the filling layer provides the first adhesive layer with a planarization height in the separation areas and the planarization height is substantially equal to height of the conductive signal lines.