Patent ID: 8669964

Claim:
A method of manufacturing a piezoresistive device which generates a signal using a piezoresistive property of carbon nanotubes, the method comprising the steps of: (a) producing a polymer structure by pressing a polymer material, said producing the polymer structure including (a-1) preparing an upper mold having one or more first protrusions on a lower surface thereof, (a-2) preparing a lower mold having a second protrusion on an upper surface thereof, the second protrusion not being formed on a peripheral portion of the upper surface, the second protrusion having a predetermined height in a vertical direction compared to the peripheral portion of the upper surface, and (a-3) forming one or more pattern grooves in an upper surface of the polymer material by pressing the upper mold against the upper surface of the polymer material, and forming an escape groove in a lower surface of the polymer material by pressing the lower mold against the lower surface of the polymer material, wherein the escape groove is not formed in a peripheral portion of the lower surface of the polymer material but is depressed inwardly from the peripheral portion of the lower surface of the polymer material, forming a flange defined collectively by the peripheral portion of the lower surface and a side of the escape groove, (b) applying a carbon nanotube solution inside each of the pattern grooves of the polymer structure; and (c) drying the carbon nanotube solution to form a carbon nanotube pattern inside each of the pattern grooves of the polymer structure.