Abstract: A droplet ejection device includes a processor; and a memory device configured to store a program, the program executed by the processor to cause the processor to: acquire information of a droplet ejection unit including a plurality of nozzles, the plurality of nozzles moving in a first direction toward an object and ejecting a droplet; and set ejection conditions of the droplet in each of the plurality of nozzles based on the acquired information of the droplet ejection unit. The droplet ejection device further may include an inspection unit configured to inspect the nozzle. The information of the nozzle may include information of a shape in a tip of the nozzle. It is possible to eject a droplet in a stable and consistent manner at a predetermined position by using one embodiment of the present disclosure.

Abstract: A hole formation method including applying a pillar-forming liquid to a base material, to thereby form a pillar; applying an insulating film-forming material to the base material on which the pillar has been formed, to thereby form an insulating film; removing the pillar to form an opening in the insulating film; and heat treating the insulating film in which the opening has been formed.

Abstract: A method of producing a three-dimensional structure contains the steps of: arranging a substrate close to a tip of a needle-shaped fluid-ejection body having a fine diameter supplied with a solution, ejecting a fluid droplet having an ultra-fine diameter toward a surface of the substrate by applying a voltage having a prescribed waveform to the needle-shaped fluid-ejection body, making the droplet fly and land on the substrate, and solidifying the droplet after the fluid droplet is landed on the substrate; further a three-dimensional structure has a fine diameter comprises droplets having an ultra-fine particle diameter, wherein the structure is grown by solidifying the droplets and stacking the solidified droplets.