Method of making a cochlear electrode array having...

Details Method of making a cochlear electrode array having... Method of making a cochlear electrode array having...

2005-03-08

2005-03-08

Tugbang, A. Dexter (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S825000, C029S847000, C029S854000, C029S857000, C029S860000, C607S137000

Reexamination Certificate

active

06862805

ABSTRACT:
A method of making an implantable electrode array, adapted for insertion into a cochlea, includes the steps of: (a) forming electrode contact pieces made from a precious, biocompatible material into a desired shape; (b) attaching the electrode contact pieces to a foil sheet made from a non-toxic but chemically-active metal; (c) connecting a wiring system to the metal contact pieces; (d) molding a flexible polymer carrier around the electrode contact pieces and wiring system while such are held in place by the foil sheet; and (e) etching away the foil sheet, leaving the electrode contact pieces exposed at a surface of the molded polymer carrier. The exposed electrode contacts are made so as to have a shape, geometry, or makeup that aids in controlling the current flow and current density associated with the electrode contact as a function of position on the electrode contact.

REFERENCES:
patent: 4819647 (1989-04-01), Byers et al.
patent: 5720099 (1998-02-01), Parker et al.
patent: 6144883 (2000-11-01), Kuzma

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