Patent ID: 8490571

Claim:
A coater comprising: a droplet jet part which ejects a plurality of droplets of a solution containing a polymer material functions as a pinning agent toward an object to be coated to apply the droplets to a surface of the object, each of the droplets applied on the surface having a fixed diameter; a reduced pressure-dryer which performs reduced pressure drying on the droplet applied on the surface to form a plurality of residues of the droplets on the surface, each of the residues remaining the fixed diameter; and a remoisturizing-drying part which blows a dissolution gas toward the residues to form a plurality of applied bodies containing the residues as a solute, each of the applied bodies remaining the fixed diameter, the dissolution gas containing a solvent dissolving the residues, and which blows a drying gas toward the applied bodies formed on the surface to dry the applied bodies thereby forming a plurality of solute objects on the surface, each of the solute objects remaining the fixed diameter with a substantially identical thickness, a sectional shape in a thickness direction of each of the solute objects having a trapezoidal shape whose upper end portion is flat with the thickness on an entire of the surface.