| 摘要 |
A method of very inexpensively and stably producing a solid body having a depressed portion on a surface, which is expected to be applied in a variety of industrial fields. This method forms a solid body having a depressed portion on a surface by using a solution at least containing a solvent A, a solvent B and a polymer compound soluble in solvent B, solvent A being a hydrophilic solvent and solvent B being a hydrophobic solvent, the boiling point of solvent A being equal to or higher than the boiling point of solvent B, and the total mass of solvent B being 50% or more of the total mass of the solvents contained in the solution, then solidifying the solution while forming a depressed portion from condensation on the surface of the solution during a process wherein either one or both of the solvent A and solvent B contained in the solution are evaporating.
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