Glass, ceramic and metal substrates with self-cleaning surface, processes for their preparation and their use

The invention relates to glass, ceramic or metal substrates having at least one self-cleaning surface, comprising one at least partially hydrophobed layer with a micro raw surface structure disposed on said substrate. The layer contains a glass flow and structure-forming particles having an average particle diameter of ranging from 0.1 - 50 mu m; the glass flow and structure-forming particles are present in the form of a volume ratio ranging from 0.1 - 5 and the micro raw surface structure has an average height/average distance of neighbouring profile tips ratio of 0.3 - 10. In order to produce the subject matter of the invention, the substrate is coated with a composition containing a glass flow and structure-forming particles, said layer is baked and hydrophobed.