Biocompatible multilayer-thin-film-type coating as a surface treatment for biomedical substrates, and method for the production thereof

A process to manufacture a thin-film multilayered coating for the treatment of biomedical substrates, comprising:

• polishing the substrate surface to a granulometry of between 700 and 2500 to generate a mirror surface finish;
• washing the substrate with acetone in ultrasound for 10 to 20 min;
• submerging the substrate in a PVD-DC magnetron sputtering reactor at a temperature of between 20 and 25° C., vacuum of 5.1×10-6 torr, and 50 to 60% relative humidity;
• depositing a TiN coating layer with thickness of between 550 and 590 nm from a Ti precursor target (99.99%) at a pressure of 2 to 4 mtorr, argon flow between 8 and 12 sccm, nitrogen flow between 0.1 and 0.2 sccm, precursor target potential between 80 and 120 W, polarization voltage from −50 to −120 V, and interelectrode distance between 8 and 12 cm;
• depositing the Ti coating layer with thickness between 550 and 590 nm from a Ti precursor target (99.99%) at a pressure from 2 to 4 mtorr, argon flow between 8 and 12 sccm, precursor target potential between 80 and 120 W, polarization voltage from −50 to −120 V, and interelectrode distance between 8 and 12 cm;
• and
• depositing the TiZr coating layer with thickness between 550 and 590 rim from a TiZr precursor target (30-70%) at a pressure from 2 ;
• to 4 mtorr, argon flow between 8 and 12 sccm, precursor target potential between 60 and 100 W, polarization voltage from −50 to −120 V, and interelectrode distance between 8 and 12 cm.