Novel ultrathin planar touch keyboard based on micro-current detection technology

The utility model discloses a novel ultrathin planar touch keyboard based on a micro-current detection technology. The keyboard comprises a plane touch key layer, a circuit board and a bottom plate, aconductive loop, an amplifier circuit, a single-chip microcomputer and a USB communication module are arranged on the circuit board, the conductive loop is electrically connected with the amplifier circuit, the amplifier circuit is electrically connected with the single-chip microcomputer, and the single-chip microcomputer is electrically connected with a USB interface of a computer through the USB communication module. The planar touch key layer comprises a plastic substrate and a plurality of key modules, the plurality of key modules are embedded in the plastic substrate, each key module comprises three layers of structures from inside to outside, the three layers of structures are respectively an inner electrode, a middle insulating layer and an outer electrode, and the inner electrodeand the outer electrode a