Method of producing a biocompatible prosthesis

US5849206A · kind A · utility

Assignee

• Biotronik Mess -und Therapiegeraede GmbH & Co. Ingenieurbuero Berlin · DE

Inventors

• Michael Amon · Dormitz, DE
• Armin Bolz · Buckenhof, DE

Key dates

• Filing date: Feb 4, 1997
• Grant date: Dec 15, 1998
• Expiry date: Feb 4, 2017

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2310/00742
• WIPO field: Medical technology
• WIPO sector: Instruments

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.