Balloon electrode catheter, balloon electrode assembly, and flexible circuit for balloon electrode assembly

A flexible circuit for a balloon electrode assembly, comprising circuit strips, both ends along a length of each circuit strip define its proximal and distal ends respectively, wherein each circuit strip comprises:

• an insulating substrate, configured to attach to a balloon body of the balloon electrode assembly and to conform to curvature changes during expansion and contraction of the balloon body;
• electrode pads, fixed on the insulating substrate and configured to generate a pulsed electric field, wherein the electrode pads comprises a first electrode pad and a second electrode pad, the first electrode pad and the second electrode pad are arranged sequentially from the proximal end to the distal end of the circuit strip;
• and
• traces, disposed within the insulating substrate and configured to connect the electrode pads to a corresponding circuit;
• wherein the traces comprise at least one branch trace that is disposed side by side with at least one electrode pad along an extended surface of the insulating substrate on a widthwise direction of the circuit strip and connected to another electrode pad, such that said electrode pads are electrically connected through the branch trace.