Surface modification of medical implants
First Claim
1. A method for the production of a random, irregular surface on an article, comprising:
- exposing an article having a polymer surface to a plasma comprised of a reactive etching species that etches the surface by producing a volatile reaction product with the substrate and a second species selected to promote dynamic masking of the substrate, said dynamic masking comprising in situ deposition and removal of a species having etching properties different than the substrate, to obtain non-uniform etching of the substrate.
2 Assignments
0 Petitions
Accused Products
Abstract
An irregularly etched medical implant device is provided having random non-uniform relief patterns on the surface ranging from about 0.3 μm to less than about 20 μm in depth. The random, irregular surface as defined by the etch micromorphology and respective dimensional properties are obtained by exposing a surface to a reactive plasma in a chamber wherein said reactive plasma produces a reaction product with the surface to thereby etch the surface, said reaction product or a complex thereof having a vapor pressure lower than a pressure in the chamber; providing a dynamic masking agent during the etching process; and removing the reaction products.
604 Citations
29 Claims
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1. A method for the production of a random, irregular surface on an article, comprising:
exposing an article having a polymer surface to a plasma comprised of a reactive etching species that etches the surface by producing a volatile reaction product with the substrate and a second species selected to promote dynamic masking of the substrate, said dynamic masking comprising in situ deposition and removal of a species having etching properties different than the substrate, to obtain non-uniform etching of the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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10. A method of preparing an article for use as a medical device having a roughened surface amenable to bioadhesion, comprising;
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exposing a polymeric surface of a medical device to a plasma comprised of a reactive etching species that etches the surface by producing a reaction product with the substrate; and removing the reaction products to obtain a surface having random and irregular etched features of greater than about 0.1 μ
m in depth. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification