Metallic stents are treated with a gaseous species in a plasma state under conditions causing the species to polymerize and to be deposited in polymerized form on the metallic stent surface prior to the application of a drug-polymer mixture, which is done by conventional non-plasma deposition methods....http://www.google.es/patents/US20070281117?utm_source=gb-gplus-sharePatente US20070281117 - USE OF PLASMA IN FORMATION OF BIODEGRADABLE STENT COATING
USE OF PLASMA IN FORMATION OF BIODEGRADABLE STENT COATING