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Method of laser machining molds with microtextured surfaces

  • US 4,965,430 A
  • Filed: 09/18/1989
  • Issued: 10/23/1990
  • Est. Priority Date: 09/18/1989
  • Status: Expired due to Term
First Claim
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1. A process for preparing a mandrel for forming envelopes for implantation in the human body, which envelopes are provided with micropillars on the exterior surface thereof, comprising providing a workpiece of solid stock material in the general shape of the desired envelopes, positioning said workpiece for rotation on a supporting means, moving a pulsing laser beam, directed at said rotating workpiece, around the anterior and posterior surfaces of said workpiece between a point adjacent the anterior center of rotation to a point adjacent the posterior center of rotation in a plane parallel to the axis of rotation of said workpiece while maintaining the focal point of said beam approximately at each workpiece surface at which it is directed, controlling the rate of pulsing of said laser beam and the speed of rotation of said workpiece to produce patterns of blind microholes of predetermined depth and diameter, thereby producing an array of blind microholes over substantially the entire surface of said workpiece.

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