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State of the art applications of polymers in medical implants cause in some cases problems due to their insufficient bio-and bloodcompatibility. On the other hand, titanium based materials are known to have bioinert properties.In order to combine the mechanical properties of polymers with the biocompatibility of titanium based materials, a new process for coating polymers with Titaniumcarbonitride(Ti(C,N))-layers by plasma assisted chemical vapor deposition (PACVD) has been developed.The in vitro bio-and bloodcompatibility is improved by the coating compared with uncoated PET and PP. It could be demonstrated that leaching of plasticizers (e. g. from PVC) can be prevented. Moreover PACVD is an excellent technique to obtain even coatings on complex substrates like textile implants.

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