The United States of America As Represented by the Administrator of the

Albert J Weigand

Bruce A Banks

James S Sovey

This invention is concerned with fabricating textured surfaces on polymers without altering their surface chemistries. A surface of a fluorocarbon polymer 10 is exposed to a beam 12 of ions from a source 14 to texture it. The polymer 18 which is to be surface-roughened is then cast over the textured surface 20 of the fluorocarbon polymer. After curing, the cast polymer is peeled off the textured fluorocarbon polymer, and the peeled off surface 22 has a negative replica of the textured surface 20. The microscopic surface texture provides large surface areas for adhesive bonding. In cardiovascular prosthesis applications the surfaces are relied on for the development of a thin adherent well nourished thrombus.

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Lakewood, OH, United States of America

Albert J Weigand