发明名称 |
IDENTITY CARD WITH A VISIBLE AUTHENTICATING MARK AND A PROCESS FOR MANUFACTURING THE SAME |
摘要 |
<p>The identity card (1) contains at least one layer (7) which is suitable for lettering. Information is written into this laye using a laser beam. The information is made irreversibly visible by changes of the optical properties effected by the laser beam The layer to be lettered is a lacquer layer in which additives, which are absorbent for the wavelengths of the laser writer introduced.</p> |
申请公布号 |
EP0676074(B1) |
申请公布日期 |
2001.03.07 |
申请号 |
EP19940904181 |
申请日期 |
1993.12.23 |
申请人 |
GIESECKE & DEVRIENT GMBH |
发明人 |
BERGMANN, MATTHIAS;HENKENSCHUH, HORST;KRUSCHE, REINHARD;RIEDL, JOSEPH |
分类号 |
B29C47/00;B32B7/02;B42D25/41;G06K19/06;G06K19/08;G06K19/10;G06K19/18;G11B7/24;(IPC1-7):G06K19/18 |
主分类号 |
B29C47/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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