Patent ID: 7727431

Claim:
A method of producing a three-dimensional structured surface with haptically and/or optically detectable microstructures that are fixed as a dataset, the method comprising: a) preparing a first virtual or real elastic film having a structured surface; b) determining the elongations and compressions in the first virtual or real elastic film that would be produced in a shaping process of the structured surface; c) modifying the dataset so that the elongations and compressions are at least partially compensated; d) checking a second virtual or real elastic film structured with the modified dataset for distortion in the microstructures affected by the shaping process of the structured surface; e) if necessary, repeating steps b) through d) until a final dataset is obtained; and f) structuring a real elastic film according to the final data set, so that a structured surface is produced on the real elastic film, the back side of the real elastic film being provided at least in areas with a three-dimensional macrostructure that corresponds to an elongation profile, wherein the film thickness is correspondingly greater in areas that correspond to portions of the real elastic film that were strongly elongated during the shaping process, wherein step f) comprises structuring the real elastic film using a dies, and the side of the real elastic film having the structure-supporting surface faces the die; wherein at least one sliding cushion is produced between the die and the film; and wherein at least one sliding cushion is repeatedly activated and deactivated.