US Patent No. 10,716,206

FLEXIBLE PRINTED CIRCUIT BOARD RETURN PATH DESIGN WITH ALIGNED COMPANION TRACE ON GROUND PLANE


Patent No. 10,716,206
Issue Date July 14, 2020
Title Flexible Printed Circuit Board Return Path Design With Aligned Companion Trace On Ground Plane
Inventorship Jin Zhao, San Jose, CA (US)
Assignee OmniVision Technologies, Inc., Santa Clara, CA (US)

Claim of US Patent No. 10,716,206

1. A flexible printed circuit board (PCB), comprising: a flexible first layer including a plurality of conductive traces arranged in the flexible first layer, wherein a first end of the plurality of conductive traces is coupled to a first circuit block at a first end of the flexible PCB, and wherein a second end of the plurality of conductive traces is coupled to a second circuit block at a second end of the flexible PCB such that the first circuit block is coupled to the second circuit block through the plurality of conductive traces, wherein the plurality of conductive traces are separated and spaced apart from one another in the flexible first layer; anda flexible second layer proximate to the flexible first layer, wherein the flexible second layer includes a plurality of companion traces arranged in the flexible second layer, wherein the flexible second layer of the flexible PCB is coupled to provide a reference plane, which is a ground plane to the first and second circuit blocks, including the plurality of companion traces and coupled to the first and second circuit blocks, wherein the plurality of companion traces is arranged in the flexible second layer to be a replica of the plurality of conductive traces in the flexible first layer such that each one of the plurality of conductive traces in the flexible first layer is proximate to and aligned with a corresponding one of the plurality of companion traces in the flexible second layer along an entire length between the first and second circuit blocks; wherein the reference plans in the flexible second layer further includes a reference mesh arranged in the flexible second layer and extending between the first and second ends of the flexible PCB.