Process for manufacturing electrically conductive components

A - Human Necessities – 61 – N

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A61N 1/05 (2006.01) H01L 21/78 (2006.01)

Patent

CA 2443782

A method of forming a device, such as an electrode array for a cochlear implant. The method comprises a step of forming a predetermined pattern of relatively electrically conductive regions and relatively electrically resistive regions in a sheet of biocompatible electrically conductive material, such as platinum foil. The method can comprise a step off working on the sheet to remove predetermined portions therefrom to form the one or more discrete relatively conducting regions. The step of working on the sheet can comprise embossing the sheet, cutting or slicing the sheet, or using electrical discharge machining (EDM) to remove unwanted portions of the sheet, the EDM equipment having a cutting tool comprising an electrode.

L'invention concerne un procédé permettant de fabriquer un dispositif, tel qu'une matrice d'électrodes, pour un implant cochléaire. Ce procédé comprend les étapes consistant à former un motif prédéterminé composé de zones relativement électroconductrices et de zones relativement résistives dans une feuille de matériau électroconducteur biocompatible, telle qu'une feuille de platine. Le procédé décrit dans cette invention peut comprendre l'étape qui consiste à usiner la feuille pour en retirer des portions prédéterminées afin de former la ou les zones relativement électroconductrices discrètes. L'étape d'usinage de la feuille peut consister à bosseler la feuille, à découper ou à trancher la feuille, ou encore, à utiliser l'usinage par électroérosion pour retirer des portions de feuille indésirables. Le matériel d'usinage par électroérosion présente un outil tranchant comprenant une électrode.

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