A capacitive input device including a substrate, a first plurality of sensor electrodes disposed proximate a top surface of the substrate and extending along a first direction, a second plurality of sensor electrodes disposed proximate a bottom surface of the substrate and extending along a second direction different from the first direction, and a plurality of routing traces coupled to the second sensor electrodes. Each routing trace is configured to extend along the first direction between respective first sensor electrodes, and to extend along the second direction underneath a second sensor electrode.