A fingerprint sensor, comprising: a plurality of substantially parallel upper pickup lines; a plurality of substantially parallel lower pickup lines; a plurality of substantially parallel drive lines oriented transversely to, and disposed between, the pluralities of upper and lower pickup lines; a first insulating layer separating the plurality of upper pickup lines from the plurality of drive lines; a second insulating layer opposite the first insulating layer, and separating the plurality of lower pickup lines from the plurality of drive lines; a plurality of upper electrode pairs, each upper electrode pair being defined at a location where an upper pickup line crosses a drive line, wherein each upper electrode pair has an impedance that is sensitive to a first object contacting or in close proximity to the upper electrode pair; and a plurality of lower electrode pairs, each lower electrode pair being defined at a location where a lower pickup line crosses a drive line, wherein each lower electrode pair has an impedance that is sensitive to a second object contacting or in close proximity to the lower electrode pair; wherein the plurality of substantially parallel drive lines comprises: (a) upper, substantially parallel drive lines; lower, substantially parallel drive lines aligned with the upper drive lines; a third insulating layer separating the upper drive lines from the lower drive lines; and a plurality of interconnects pairwise connecting each upper drive line to a lower drive line; wherein each upper electrode pair is defined at a location where each upper pickup line crosses a respective upper drive line, and each lower electrode pair is defined at a location where each lower pickup line crosses a respective lower drive line; or (b) a single layer of drive lines, wherein each upper electrode pair is defined at a location where each upper pickup line crosses a respective drive line of the single layer of drive lines, and each lower electrode pair is defined at a location where each lower pickup line crosses a respective drive line of the single layer of drive lines. a plurality of substantially parallel upper pickup lines; a plurality of substantially parallel lower pickup lines; a plurality of substantially parallel drive lines oriented transversely to, and disposed between, the pluralities of upper and lower pickup lines; a first insulating layer separating the plurality of upper pickup lines from the plurality of drive lines; a second insulating layer opposite the first insulating layer, and separating the plurality of lower pickup lines from the plurality of drive lines; a plurality of upper electrode pairs, each upper electrode pair being defined at a location where an upper pickup line crosses a drive line, wherein each upper electrode pair has an impedance that is sensitive to a first object contacting or in close proximity to the upper electrode pair; and a plurality of lower electrode pairs, each lower electrode pair being defined at a location where a lower pickup line crosses a drive line, wherein each lower electrode pair has an impedance that is sensitive to a second object contacting or in close proximity to the lower electrode pair; wherein the plurality of substantially parallel drive lines comprises: (a) upper, substantially parallel drive lines; lower, substantially parallel drive lines aligned with the upper drive lines; a third insulating layer separating the upper drive lines from the lower drive lines; and a plurality of interconnects pairwise connecting each upper drive line to a lower drive line; wherein each upper electrode pair is defined at a location where each upper pickup line crosses a respective upper drive line, and each lower electrode pair is defined at a location where each lower pickup line crosses a respective lower drive line; or (b) a single layer of drive lines, wherein each upper electrode pair is defined at a location where each upper pickup line crosses a respective drive line of the single layer of drive lines, and each lower electrode pair is defined at a location where each lower pickup line crosses a respective drive line of the single layer of drive lines. (a) upper, substantially parallel drive lines; lower, substantially parallel drive lines aligned with the upper drive lines; a third insulating layer separating the upper drive lines from the lower drive lines; and a plurality of interconnects pairwise connecting each upper drive line to a lower drive line; wherein each upper electrode pair is defined at a location where each upper pickup line crosses a respective upper drive line, and each lower electrode pair is defined at a location where each lower pickup line crosses a respective lower drive line; or (b) a single layer of drive lines, wherein each upper electrode pair is defined at a location where each upper pickup line crosses a respective drive line of the single layer of drive lines, and each lower electrode pair is defined at a location where each lower pickup line crosses a respective drive line of the single layer of drive lines.