Patent ID: 9427596
Filing Date: 2016-08-30
CPC Classification: A61N,H01G,H01R,H02G,H03H

Claim Text:
1. A hermetically sealed filtered feedthrough assembly for an implantable medical device, the filtered feedthrough assembly comprising: a) a ferrule of an electrically conductive material, the ferrule comprising a ferrule sidewall defining a ferrule opening, wherein the ferrule comprises a ferrule extension partially extending into the ferrule opening; b) an insulator of electrically non-conductive material, the insulator comprising an outer insulator surface extending longitudinally from a first insulator end to a second insulator end, wherein the insulator is hermetically sealed to the conductive ferrule sidewall in the ferrule opening, and wherein the insulator has at least a first insulator bore extending there through to the first and second insulator ends; c) a filter capacitor, comprising: d) a first metallization electrically contacted to the at least one active electrode plate in the first dielectric bore; e) a conductor comprising an electrically conductive material hermetically sealed and disposed through the first insulator bore, wherein the conductor is in a non-conductive relation with the conductive ferrule and extends through the dielectric bore so that a first conductor end is adjacent to the first dielectric end and a second conductor end is adjacent to the second insulator end; f) a first electrically conductive material coupling the conductor in the dielectric bore to the first metallization coupled to the active electrode plate; g) a second metallization electrically contacted to the ground electrode plate at at least a portion of the outer dielectric surface; and h) a ground conductor extending through the dielectric in a non-conductive relation with the active and ground electrode plates, wherein the ground conductor has a first ground conductor end spaced from a second ground conductor end, and wherein the second ground conductor end is electrically and physically coupled to the ferrule extension; and i) an oxide-resistant metal addition electrically and physically coupling from the second metallization contacted to the ground electrode plate at the outer dielectric surface to a location on the ground conductor spaced from the second ground conductor end coupled to the ferrule extension.