Patent ID: 7067241

Claim:
Method (“lift-off method”) for producing a unit having a three-dimensional final surface patterning on a base layer, in which method, in a first method step, a photoresist is applied to the base layer in order to produce a photoresist layer, in a second method step, a masked exposure, which is matched to a determined final surface patterning, of the photorosist layer is performed, in a third method step, parts of the photoresist layer are removed by developing, so that an initial surface patterning which includes photoresist subregions as sacrificial layer regions is obtained, in a fourth method step, a coating which covers the initial surface patterning which has now been obtained is applied, in a fifth method step, energy is applied to the initial surface patterning in order to destabilize the sacrificial layer regions, in a sixth method, step the initial surface patterning is acted on by a high-pressure liquid jet at a predetermined treatment temperature, with at least parts of the coating which covers the sacrificial layer regions being mechanically removed or at least broken open in order to produce the final surface patterning, where in the sixth method step, during said treatment said liquid of the high-pressure liquid jet at said predetermined treatment temperature having only a negligible chemical reaction rate and/or a negligible physical dissolution rate with respect to materials of the unit below a measurement limit.