The invention relates to different methods for distortion-free production of data carriers having at least in partial areas a transparent plastic layer with a surface structure in the form of a lens structure. The surface structure can be produced by cutting methods or embossed by applying heat and pressure. Alternatively the surface structure can be produced as a separate element which is connected after its production with the data carrier.
申请公布号
EP0790898(B1)
申请公布日期
2000.04.26
申请号
EP19950939290
申请日期
1995.11.17
申请人
GIESECKE & DEVRIENT GMBH
发明人
HOPPE, JOACHIM;HAGHIRI-TEHRANI, YAHYA;HOHMANN, ARNO;STRASSMAIER, JOSEF;GAUCH, WOLFGANG;BERGMANN, MATTHIAS;DAX, GUSTAV