Patent ID: 7687111

Claim:
A method for structuring the surface of a substrate, whereby the substrate is prepared and the material of the substrate is elastically expanded by the application of a tensile stress so that a surface area of the substrate to be structured is enlarged, whereby then at least one solution is applied to the enlarged surface area, which solution contains at least one solid substance dissolved in a solvent, whereby the expansion is then at least partly reversed by reduction or removal of the tensile stress, so that the size of the structure is reduced to the size of the structure to be produced, whereby the solvent is removed from the surface of the substrate so that the solid substance remains behind, wherein said at least one solution is applied to the surface area so as to form, on the surface of the substrate, a plurality of fields arranged in a matrix pattern, further wherein said plurality of fields are separated from one another by spaces, said spaces being free of said at least one solution.