Improvement of Plasma Coatings Used in Medicine

implants, should meet specific interrelated requirements for their biological, physical, mechanical, and technolog ical character [1]. Development of biocompatible materi als is enhanced by nanotechnology and plasma technolo gies [2, 3]. In particular, such technologies can be applied for creation of special porous coatings on the surface of intra tissue implants Porous coatings of this type can be used to release drugs into surrounding tissue for a pro longed time [2]. An improved technology of plasma mediated coat ing is suggested in this work to provide more homoge neous distribution of coating parameters (dispersity, par ticle and thermal flux distribution), thereby increasing the coating strength. The suggested technology is based on a systematic analysis of the physicochemical and construc tive properties of plasma coatings and can be used to reg ulate coating properties such as porosity and adhesion (Table 1). Let us consider the physicotechnological substantia tion of introducing new technological methods to con ventional coating procedures. The first technological innovation is to improve the kinematic scheme of the plasmatron by providing it with additional mobility (sweep) in the direction perpendicular to its main motion. Such sweep improves the coating parameters at the appli cation spot. The geometric scheme of coating concerning the plasmatron sweep is shown in Fig. 1. Increase in the distribution homogeneity relative to plasmatron sweep can be explained theoretically. Let the kinematic scheme of the plasmatron sweep be described using the random distribution law [4]: