NOVELTY - A fine grooving structure is manufactured by polymer fluid coating film formation process which coats polymer fluid which dissolves hydrophobic polymer in organic solvent and forms polymer fluid coating film on first substrate (15), water droplet formation process which supplies water droplet formation atmosphere to surface of polymer fluid coating film and forms water droplet in surface of polymer fluid coating film, and recessed part formation process which evaporates organic solvent and water droplet.    USE - Manufacture of fine grooving structure for optical material (prism structure), optical extraction structure of light emitting diode, nonreflective structure of solar cell and super hydrophobic film.    ADVANTAGE - The method manufactures fine grooving structure which has outstanding water-repellent property.    DETAILED DESCRIPTION - A fine grooving structure is manufactured by polymer fluid coating film formation process which coats polymer fluid which dissolves hydrophobic polymer in organic solvent and forms polymer fluid coating film on first substrate (15), water droplet formation process which supplies water droplet formation atmosphere to surface of polymer fluid coating film and forms water droplet in surface of polymer fluid coating film, recessed part formation process which evaporates organic solvent and water droplet and makes polymer coating film surface polymer coating film with reference plane and forms recessed parts, affixing second substrate on recessed parts through adhesive agent, first processus structure formation process which forms first processus structure on second substrate (27), and second substrate etch process which etches second substrate by setting first processus structures (29) as mask. An INDEPENDENT CLAIM is included for a fine grooving structure.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic sectional view of the processus structure formation process in manufacturing fine grooving structure.    First substrate (15)    Second substrate (27)    Adhesive bond layer (28)    First processus structures (29)    Second processus structure (32)