Method for Structuring and Chemically Modifying a Surface of a Workpiece
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United States of America Patent
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app pub date -
Dec 20, 2012
filing date -
Dec 20, 2011
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Abstract
A method for producing a chemically modified metal surface or metal alloy surface or metal oxide layer or metal alloy oxide layer on the surface of a workpiece, which surface or layer includes surface structures having dimensions in the sub-micrometer range. The method involves scanning, one or several times using a pulsed laser beam, the entire surface of the metal or metal alloy, or the metal oxide layer or metal alloy oxide layer on the metal or metal alloy, on which surface or layer the structures are to be produced and which is accessible to laser radiation. The scanning is performed in an atmosphere containing a gas or gas mixture that reacts with the surface, such that adjacent flecks of light of the laser beam adjoin each other without an interspace in between or overlap and a predetermined range of a defined relation between process parameters is satisfied.
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