METHOD FOR PRODUCING A SOLID BODY COMPRISING A MICROSTRUCTURE

摘要

The invention relates to a method for producing a solid body (1) with a microstructure (2), according to which the surface of a substrate (3) is provided with a masking layer (6) that is impermeable to the substance to be applied. The substance is then applied to the areas of substrate that are not covered by the masking layer (6). The substance is then diffused into an area of the substrate that is covered by the masking layer (6) by means of a thermal treatment, in such a way that a concentration gradient of the substance is formed in the substrate area covered by the masking layer (6), said concentration decreasing from the edge of the masking layer (6) towards the interior. The masking layer (6) is subsequently removed to expose the substrate area lying below and a layer of the substrate (3) that lies close to the surface in the exposed substrate area is converted by means of a chemical conversion reaction into a coating (9), which has a layer thickness profile that corresponds to the concentration gradient of the substance contained in the layer that lies close to the surface. An additional treatment is carried out in a subsection of the coating (9), in which the thickness of said coating (9) is reduced.