Ultrathin touch sensor and manufacturing method thereof

The invention discloses an ultrathin touch sensor and a manufacturing method thereof. The ultrathin touch sensor comprises a base material layer, a receiving circuit layer, a transmitting circuit layer and a protection layer which are stacked in sequence, wherein the receiving circuit layer and the transmitting circuit layer are arranged on the same side of the base material layer; each of the transmitting circuit layer and the receiving circuit layer comprises a plurality of conductive grids and an imprinting layer, the conductive grids are embedded into the imprinting layer, each conductive grid comprises at least three grid lines connected in sequence, the width of each grid line is not less than 1 micron, and the height-width ratio of the grid line is (1:0.5)-(1:2). According to the ultrathin touch sensor, the receiving circuit layer and the transmitting circuit layer are arranged on the same side of the base material layer and made of metal conductive materials, and the thickness of the ultrathin touch sensor is reduced. The ultrathin touch sensor has the advantages of environmental friendliness, low cost and high sensitivity.