Patent DE-102008041059-A1 (DE)
Title: Producing structurally processed/structurally coated surface of a substrate, comprises applying structured layer on the substrate in a shape corresponding to the negative image of the desired substrate surface, and processing the substrate
Inventor: ISENBERG JOERG
IPC: B23K26/40
Filed: 2008-08-06
Abstract: The method comprises applying a structured layer (2), which is made of a material expanding under the effect of heat and/or electromagnetic radiation, on a substrate (1) in a shape corresponding to the negative image of the desired structurally processed or structurally coated substrate surface, processing the substrate or applying a surface layer (5) on the substrate, and exposing the substrate provided with the structured layer to a defined electromagnetic radiation and/or a thermal treatment, where the structured layer expands by the absorption of defined electromagnetic radiation. The method comprises applying a structured layer (2), which is made of a material expanding under the effect of heat and/or electromagnetic radiation, on a substrate (1) in a shape corresponding to the negative image of the desired structurally processed or structurally coated substrate surface, processing the substrate or applying a surface layer (5) on the substrate, and exposing the substrate provided with the structured layer to a defined electromagnetic radiation and/or a thermal treatment, where the structured layer expands by the absorption of defined electromagnetic radiation and/or by heat effect, so that the structured layer is peeled off or blown off from the substrate. The material of the structured layer and the frequency spectrum of the defined electromagnetic radiation are chosen, so that the defined electromagnetic radiation is strongly absorbed more than 100 times in the structured layer compared to the surface layer and/or the substrate. The expansion of the structured layer is caused by thermal effect based on heating of the adjacent surface layer and/or heating of the adjacent substrate. The heating of the adjacent surface layer and/or heating of the adjacent substrate are caused by the absorption of defined electromagnetic radiation. The frequency spectrum of the defined electromagnetic radiation is chosen, so that the defined electromagnetic radiation is strongly absorbed more than 100 times in the surface layer and/or the substrate compared to the structured layer. The defined electromagnetic radiation uniformly hits on the substrate. The defined electromagnetic radiation is microwave radiation and laser radiation, and acts on the substrate from the top. The material of the surface layer consists of transparent material sufficient for the defined electromagnetic radiation. The defined electromagnetic radiation acts on the substrate from the free lower side consisting of a permeable material sufficient for the defined electromagnetic radiation. The substrate is arranged in such a manner that the direction of incidence of the defined electromagnetic radiation corresponds to the direction of the gravitation force. The structured layer is a lacquer or a paste and is applied on the substrate in a printing process. The surface layer is applied by evaporating, sputtering or chemical vapor deposition process. The surface layer consists of an electrically conducting metallic material. During or after the substrate is exposed to the thermal treatment and/or the defined electromagnetic radiation, a cleaning of the substrate is carried out.