Biocompatible prosthesis

US5735896A · kind A · utility

Assignee

• BIOTRONIK AG · CH

Inventors

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

Key dates

• Filing date: Apr 6, 1995
• Grant date: Apr 7, 1998
• Expiry date: Apr 6, 2015

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 format a second, predetermined flow rate and coupling-in of HF power with a predetermined, second power density, for a second, predetermined time period.