WATER-REPELLENT SUBSTRATE, HEAT EXCHANGER USING WATER-REPELLENT SUBSTRATE, AND METHOD FOR PRODUCING WATER-REPELLENT SUBSTRATE

摘要

PROBLEM TO BE SOLVED: To provide a water-repellent substrate having excellent water repellency to condensed water produced on a surface thereof, a heat exchanger using water-repellent substrate and a method for producing water-repellent substrate.

SOLUTION: The water-repellent substrate is provided with a substrate 110, and a hydrophobic film 120 disposed upon the surface of the substrate 110, wherein a plurality of needle-shaped protrusions 111 extending in a needle shape is formed on the surface of the substrate 110. The hydrophobic film 120 comprises a plurality of minute protrusions 121 that are formed finer than the needle-shaped protrusions 111 on the surfaces of the needle-shaped protrusions 111 and the surface of the substrate 110 between the needle-shaped protrusions 111.

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