Patent ID: 9041482
Filing Date: 2015-05-26
Classification: H01P,H03H,H05K

Abstract:
1. A flexible circuit board with an attenuation reduction control structure for high-frequency signal transmission lines of the flexible circuit board, comprising: a substrate, which comprises a first surface and a second surface; a plurality of extended high-frequency signal transmission lines, which is formed on the first surface of the substrate, the high-frequency signal transmission lines being spaced from each other by a predetermined distance, the high-frequency signal transmission lines each showing a slope shift amount so as to form at least one bottom angle structure and a top angle structure; a covering insulation layer, which covers the first surface of the substrate and surfaces of the high-frequency signal transmission lines; characterized in that: the second surface of the substrate comprises an impedance control layer formed thereon, the impedance control layer comprising a first attenuation reduction pattern formed in an extension direction of the high-frequency signal transmission lines, the first attenuation reduction pattern comprising a plurality of openings spaced from each other by a spacing distance, the openings corresponding to the bottom angle structures of the high-frequency signal transmission lines; wherein the openings of the first attenuation reduction pattern have a greatest opening size that is less than a width of a bottom of the high-frequency signal transmission line.