Data card comprising a laser recording medium and a thin glass l

Details Data card comprising a laser recording medium and a thin glass l Data card comprising a laser recording medium and a thin glass l

1998-10-23

2000-09-19

Evans, Elizabeth

Stock material or miscellaneous articles

Composite

Of quartz or glass

428432, 428433, 428913, 43027012, 4304951, 430945, 369283, 369288, B32B 300

Patent

active

061209074

ABSTRACT:
According to the present invention a data card is provided which comprises a heat-mode laser recording medium on a support and wherein said laser recorder medium is covered by a thin flexible glass layer. The data card has a higher mechanical strength, an improved shelf-life and offers better security with regard to counterfeiting. The heat-mode laser recording medium is preferably a metal layer of which the optical reflectivity or density can be changed by laser exposure. The glass layer is preferably a borosilicate glass having a thickness less than 850 .mu.m.

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