Method of producing a biocompatible prosthesis

Details Method of producing a biocompatible prosthesis Method of producing a biocompatible prosthesis

1997-02-04

1998-12-15

Breneman, R. Bruce

Etching a substrate: processes

Gas phase etching of substrate

Application of energy to the gaseous etchant or to the...

216 37, H01L 21308

Patent

active

058492062

ABSTRACT:
A method of producing a biocompatible prosthesis based on a substrate made essentially of metal or ceramic. The substrate is placed into a reactor chamber of a cathodic vapor deposition arrangement and the chamber is evacuated to a predetermined pressure. A predetermined, negative bias voltage is then applied to the substrate and the substrate is surface treated by adding an etching gas to the reactor chamber, at a predetermined, first flow rate and coupling in a high frequency power with a first, predetermined power density for ionic etching for a first, predetermined period of time. The surface treated substrate is separated from the negative bias voltage and a semiconductor cover layer is chemical vapor-phase deposited on the substrate by adding to the reactor chamber a multi-component mixture of process gases containing a semiconductor element in bound form at a second, predetermined flow rate and coupling-in of HF power with a predetermined, second power density, for a second, predetermined time period.

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Bolz, A. et al., "New Coating Materials for Artificial Heart Valves", Ima of the Twenty-First Century, Proceedings of the Annual International Conference of the IEEE Engineering in Medicine an Biology Society (Cat. No. 89CH2770-6, Seattle, WA, 9-12 Nov. 1989, Bd. 11, 1989, New York, NY, IEEE, pp. 164-166.

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