Porous coatings on electrodes for biomedical implants

A - Human Necessities – 61 – N

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A61N 1/05 (2006.01)

Patent

CA 2573329

An implantable electrode has a biomedically compatible, microscopically rough, metal coating that creates a high double-layer capacitance. The coating is applied to the implant by physical vapor deposition. The coating preferably is applied via a generally oblique coating flue or a law energy coating flux. In some embodiments, the coating has pores. The pores can contain a drug, which can diffuse over a period of time. The coating may be partially nonporous to protect the implant from corrosion.

L'invention concerne une électrode implantable comprenant un revêtement métallique à rugosité microscopique biomédicalement compatible permettant d'obtenir une capacité double couche élevée. Le revêtement est appliqué sur l'implant par dépôt physique en phase vapeur. De préférence, ce revêtement est appliqué par l'intermédiaire d'un flux de revêtement généralement oblique ou d'un flux de revêtement à faible énergie. Dans certains modes de réalisation, ledit revêtement comporte des pores. Ces pores peuvent contenir un médicament pouvant se diffuser sur une période donnée. Le revêtement peut être partiellement non poreux en vue d'une protection de l'implant contre la corrosion.

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