Patent ID: 8938309
Filing Date: 2015-01-20
Classification: A61N,B23K,C22C,H01G,H01R,H02G,Y10T

Abstract:
1. A feedthrough for an active implantable medical device, the feedthrough comprising: a) a conductive ferrule comprising a ferrule sidewall having an inner ferrule surface defining a ferrule opening, wherein the ferrule sidewall extends from a first ferrule end surface spaced from a second ferrule end surface; b) a dielectric substrate disposed partially within and hermetically sealed to the inner ferrule surface, wherein the dielectric substrate comprises an elevated portion extending outwardly from the first ferrule end surface to an opposed dielectric end surface adjacent to the second ferrule end surface; c) at least one via hole extending through the dielectric substrate from an outer surface of the elevated portion to the opposed dielectric end surface; d) a conductive fill comprising platinum, wherein the conductive fill is disposed within the at least one via hole in a hermetically sealed relationship therewith to thereby provide an electrically conductive path extending from a first fill end adjacent to an outer surface of the elevated portion of the dielectric substrate to a second fill end adjacent to the second dielectric end surface; and e) a leadwire connection feature comprising gold and having a proximal connection portion extending to a distal connection portion, wherein the proximal connection portion is physically and electrically coupled to the first fill end with the distal connection portion contacting the elevated dielectric portion, but spaced from the ferrule, f) wherein the distal connection portion is configured for direct electrical connection to a leadwire.