Patent ID: 7632466

Claim:
A surface structure with an ultrahydrophobic surface, wherein the surface structure comprises a plurality of distinct hydrophilic areas each having a surface area ranging from 1 nm 2 to 1 μm 2 present on the ultrahydrophobic surface, wherein (1) the ultrahydrophobic surface has a surface topography, in which the value of the integral of the function S(logf)=a(f)·f, giving a relationship between the spatial frequencies of the individual Fourier components and their amplitude a(f), is between the integration limits log(f 1 /μm −1 )=−3 and log(f 2 /μm −1 )=3, at least 0.5, (2) the ultrahydrophobic surface comprises an ultrahydrophobic material or is coated with an ultrahydrophobic material, and (3) when a water droplet with a volume of 10 μl is placed on the ultrahydrophobic surface and the ultrahydrophobic surface is tilted at an angle, the angle at which the droplet rolls-off the surface does not exceed 10°.