Patent ID: 8021593

Claim:
A method of producing a three-dimensional structure, comprising the steps of: providing a needle-shaped nozzle body having a fine inside diameter at a tip thereof, the nozzle supplied with a fluid; arranging a tip of the nozzle to be close to a substrate; ejecting a fluid droplet having an ultra-fine diameter from the tip of the nozzle toward a surface of the substrate by applying a voltage having a prescribed waveform to the needle-shaped nozzle body via the electrode so as to make the droplet fly and land on the substrate, and thereby the droplet being dried to be a solidified substance after landing on the substrate; and maintaining a position and continually ejecting subsequent droplets by applying the prescribed waveform voltage to the nozzle for the droplets being stacked on said solidified substance so as to form a grown three-dimensional structure, wherein the nozzle inside diameter is 0.01 μm to 8 μm, wherein an electric line of force is attracted to the top of the solidified substance of the droplet, and wherein the three-dimensional structure is grown by stacking the subsequent flying droplet guided along the electric line of force onto the top of the solidified substance, wherein a diameter of the ejected droplet is 15 μm or less, and wherein the fluid droplet dries and solidifies by evaporation and drying to increase the viscosity of the fluid to allow stacking.