Patent · US Active

Data support with identifications written thereon by means of a laser beam and method for production thereof

US8006908B2 · kind B2 · utility

3Cited by

6References

19Claims

0Family size

Assignee

GIESECKE & DEVRIENT GMBH · DE

Inventors

Matthias Bergmann · Hersbruck, DE
Günter Endres · Birkenfeld, DE
Georg Kruse · Gifhorn, DE

Key dates

Filing date	Dec 1, 2004
Grant date	Aug 30, 2011
Priority date	—
Expiry date	Sep 15, 2028

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB42D2033/24
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

The invention relates to a data carrier into which, by a laser beam, identifiers (20, 22) are introduced in the form of patterns, letters, numbers and/or images that are visible due to local changes in the optical properties of the data carrier, effected by the laser beam and resulting from material transformations. According to the present invention, the data carrier comprises a laser-sensitive recording layer (26) that is transparent in the visible spectral range and that is provided with a surface relief in the form of a lens grid (28). The identifiers are introduced with the laser beam from different directions through the lens grid (28) into the recording layer (26) and are perceptible when later viewed from those same directions. The data carrier is transparent at least in the area of the introduced identifiers (20, 22).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.