THIN-FILM COATING OF POLE TIPS OF ENDOCARDIAL ELECTRODES OF CARDIOSTIMULATORS AND METHOD OF ITS OBTAINING Russian patent published in 2015 - IPC C23C4/10 C23C14/34 C23C28/00 

FIELD: electricity.

SUBSTANCE: invention relates to the field of obtaining of coatings of pole tips (PT) (anode and cathode) of endocardial electrode (ECE) of cardiostimulator. The thin-film coating consists of the porous layer of biocompatible metal with the thickness L/n1, where n1=1.3÷3, formed from dust of metals with the medium size of fractions d=L/n1, where L - unevenness of PT ECE working surface, layer of biocompatible nitride of metal MeN, obtained by PVD method with column high-porous structure with the thickness Λ=d/n2, where n2=1.3÷10, and ion-modified surface layer MeN with the thickness δ=Λ/n3, where n3=1.3÷100. PT ECE surface is pre-processed by sand blasting with unevenness L=60-100 mcm. A porous layer of biocompatible metal is applied by plasma gas thermal method at atmospheric pressure in the atmosphere of argon with dust of metal with the size of particles d=L/n1. A layer of biocompatible nitride of metal MeN is applied by PVD method in nitrogen atmosphere at the pressure ~1·10^-3 Torr at the temperature 450-500°C. The surface is processed by a beam of ions of biocompatible metals Me with energy 20-100 keV and the dose no less than 10¹⁷ particles/cm².

EFFECT: obtaining of thin-film coating, biocompatible, corrosion resistant in blood plasma, with high near-electrode Helmholtz capacity, characterised by high adhesion to the product and mechanical strength.

8 cl, 1 dwg, 1 tbl