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.