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Surface modification

  • US 6,670,571 B2
  • Filed: 05/17/2002
  • Issued: 12/30/2003
  • Est. Priority Date: 05/18/2001
  • Status: Expired due to Term
First Claim
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1. A method of operating on a workpiece, the method comprising causing relative movement between the workpiece and a power beam in a traverse direction so as to expose a series of locations on the workpiece to the power beam;

  • and at each location causing the power beam to move relative to the workpiece in a predetermined manner having a component transverse to the traverse direction, whereby at each location, workpiece material is melted and displaced by the power beam so as to form a cavity or hole.

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