2022-03-082022-03-082006https://publica.fraunhofer.de/handle/publica/307187DE2005018237 U UPAB: 20060505 NOVELTY - Apparatus for printing a rigid flat substrate with a smooth surface comprises a printer (1) with a photoconductor drum for direct transfer of toner to the substrate and a substrate holder (2) that can be moved along a linear axis relative to the printer to position the substrate for contact with the drum. DETAILED DESCRIPTION - Apparatus for printing a rigid flat substrate with a smooth surface comprises a printer (1) with a photoconductor drum for direct transfer of toner to the substrate and a substrate holder (2) that can be moved along a linear axis relative to the printer to position the substrate for contact with the drum. The printer or the holder is spring-loaded to provide an adjustable contact force between the drum and the substrate and an electrode potential is applied to the holder to generate an electrostatic transfer field between the drum and the substrate. USE - The apparatus is useful in electronics, e.g. for producing organic semiconductors, or in biotechnology, nanotechnology or medical technology, e.g. for producing peptide arrays on microtiter plates. ADVANTAGE - The substrate can be printed repeatedly in precisely defined positions to create three-dimensionally structured layers.de608670utility model202005018237