Method for preparing silver-enriched antibacterial film on pyrolytic carbon and TiN film for medical use

The invention relates the method for preparing rich silver antibiotic film used for medical pyrolytic carbon and TiN film. It solves the antibiosis question. The method comprises the following steps: on the pyrolytic carbon: a buffing and cleaning; b evacuating; c sputtering and cleaning for 5 minutes with 1keV nitrogen ion; d injecting silver ion: 70, 30keV energy, 2-8mA beam current, 2X1014/cm2-3X1014/cm2 dosage, and forming rich silver antibiotic film and antibiosis ratio being 100%; on TiN film: a buffing and cleaning; b evacuating; c sputtering and cleaning for 5 minutes with 1keV nitrogen ion; d sputtering Ti target with 3keV, 80mA Ar+ ion, 20-40keV, beam current: bombarding with 2-8mA high-energy N+ ion for 10-20 minutes; 50-350eV, beam current: bombarding with 10-30mA low-energy N+ ion for 60-180 minutes to deposit, N2 air pressure being 8X10 3Pa; e injecting silver ion: 30-80keV, beam current: 2-8mA, 1X1017/cm2-5X1018/cm2 dosage, forming rich silver antibiotic film and antibiosis ratio being 90%. The film has the advantages of good abradability, strong adhesive force and anti-corrosion, good cell compatibility and long antibiosis time-effect. The film can be used to prepare artificial heart valve and hard tissue alternate material which is implanted in human.