Touch sensor with integrated signal bus extensions

An electronic device, comprising:

• a housing;
• a display mounted in the housing;
• and
• a touch sensor panel that at least partially overlaps the display, wherein the touch sensor panel includes a flexible substrate having a main portion including a common edge with a main width and a plurality of separated extending portions extending from the common edge and having one or more extending portion widths less than the main width, and a plurality of signal lines formed on opposing first and second surfaces of the main portion and the plurality of separated extending portions;
• wherein a first extending portion of the plurality of separated extending portions includes one or more of the plurality of signal lines formed only on the first surface and not on the second surface, and wherein a second extending portion of the plurality of separated extending portions includes one or more of the plurality of signal lines formed only on the second surface and not on the first surface.

A touch sensor panel comprising:

• a flexible polymer sheet having opposing first and second surfaces, wherein the flexible polymer sheet includes a main portion having a common edge with a main width and one or more protruding portions having one or more protruding portion widths less than the main width, the one or more protruding portions protruding from the common edge;
• capacitive touch sensor electrodes formed on the flexible polymer sheet;
• and
• a plurality of signal lines connected to the capacitive touch sensor electrodes and extending onto the one or more protruding portions;
• wherein the one or more protruding portions include first and second sections, the first section including one or more of the plurality of signal lines formed only on the first surface and not on the second surface, and the second section including one or more of the plurality of signal lines formed only on the second surface and not on the first surface;
• and
• wherein the first and second signal lines are non-overlapping.