Patent ID: 7757538

Claim:
A process to produce an embossing plate for a hot-cold-laminating press with three-dimensional structures to prepare documents by means of lamination and surface embossing, whereby recessed and raised structures relative to a highly polished surface defined as a reference level are produced in the embossing plate, wherein the recessed and raised structures are produced in at least a two-step structuring process with the first process step producing recessed and raised structures in the unstructured embossing plate surface and with the at least second step producing additional recessed and raised structures in the unstructured surface and in the previously structured surface, wherein the recessed and raised structures are produced by a galvanic process; wherein the recessed and raised structures are formed by a photomasking process; and wherein a lens shaped structure is produced and embodied as a recessed structure, and the lens shaped structure is produced by an undercut structure, the undercut structure being produced by a photomask having openings so small that there is essentially isotropic etching thereby creating a strong undercut thus achieving similar lateral etching effect as in the vertical dimension to thereby produce a desired lens shaped depression.