Product comprising a protected microstructured area, and a method and a device for producing the same
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United States of America Patent
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Issued Date -
Jan 8, 2009
app pub date -
Sep 28, 2005
filing date -
Oct 1, 2004
priority date (Note) -
Abandoned
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Abstract
A bare diffractive microstructured area on a product is protected against wearing by one or more protruding elements. In an embodiment, the product is provided with a depression, whose bottom is further provided with a diffractive microstructured area. Thus, the rim areas of the depression form a protruding element with respect to the microstructured area. If the product is rubbed, for example, against the surface of a table, the protruding element prevents the rubbing surface from having a physical contact with the microstructured area. The microstructured area does not need to be protected with a transparent protective layer, which entails significant cost savings.
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