Coating processes – Medical or dental purpose product; parts; subcombinations;... – Implantable permanent prosthesis
Patent
1995-06-07
1997-02-25
Padgett, Marianne
Coating processes
Medical or dental purpose product; parts; subcombinations;...
Implantable permanent prosthesis
427 225, 427525, 427527, 427530, 427528, 623 2, 623 66, 423446, 428450, B05D 300, C23C 1406, B01S 306, A61F 224
Patent
active
056057148
ABSTRACT:
The present invention provides a method for coating a titanium based component with diamond-like carbon to reduce the thrombogeneticity of the component. In a preferred embodiment, the titanium based component is a heart valve.
According to the present invention, the component is placed in a vacuum chamber and heated to about 600.degree. -650.degree. C. (1112.degree.-1202.degree. F.). Thereafter, silicon is then deposited onto the component, and the component is simultaneously bombarded with a beam of energetic ions to form a metal-silicide bonding layer. The component then is cooled to at least about 100.degree. C. (212.degree. F.), preferably about 80.degree. C. (176.degree. F.), and a diamond-like carbon precursor is condensed onto the metal-silicide bonding layer. The precursor is simultaneously bombarded with a beam of energetic ions to form a coating of diamond-like carbon.
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Dearnaley Geoffrey
Lankford, Jr. James
Padgett Marianne
Southwest Research Institute
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