US 12,121,735 B2
Feedthrough assembly with feature for controlling component position
Michael J. Nidelkoff, White Bear Lake, MN (US); Lance B. Lohstreter, Brooklyn Park, MN (US); Brad C. Tischendorf, Minneapolis, MN (US); Paul B. Aamodt, Prior Lake, MN (US); and Matthew J. Sanders, Wayzata, MN (US)
Assigned to Medtronic, Inc., Minneapolis, MN (US)
Filed by Medtronic, Inc., Minneapolis, MN (US)
Filed on Dec. 23, 2021, as Appl. No. 17/645,914.
Application 17/645,914 is a division of application No. 16/421,008, filed on May 23, 2019, granted, now 11,224,754.
Prior Publication US 2022/0118263 A1, Apr. 21, 2022
Int. Cl. A61N 1/375 (2006.01); H05K 5/00 (2006.01); H05K 5/02 (2006.01); C03B 23/00 (2006.01)
CPC A61N 1/3754 (2013.01) [H05K 5/0091 (2013.01); H05K 5/0247 (2013.01); C03B 23/00 (2013.01); Y10T 29/49146 (2015.01)] 9 Claims
OG exemplary drawing
 
1. A method of manufacturing a feedthrough assembly for a medical device, the method comprising:
receiving at least a portion of a ferrule configured for attachment to the medical device within a recess defined by a support platform and dimensioned to receive at least the portion of the ferrule, the ferrule defining:
an outer end surface and an inner end surface;
an aperture extending through the ferrule from the outer end surface to the inner end surface, the aperture comprising:
a first portion extending from the outer end surface to a point at least halfway from the outer end surface to the inner end surface, the first portion having a first diameter; and
a second portion extending from the inner end surface toward the point at least halfway from the outer end surface to the inner end surface, the second portion having a second diameter that is less than the first diameter,
wherein the aperture defines a longitudinal axis extending through the aperture from the outer end surface to the inner end surface; and
a ledge between the first portion of the aperture and the second portion of the aperture, the ledge extending radially inward toward the longitudinal axis, wherein the ledge defines a third portion of the aperture extending between the first portion and the second portion, and wherein a diameter of the third portion tapers from the first diameter at a junction of the third portion and the first portion to the second diameter at a junction of the third portion and the second portion
receiving a conductive pin within the aperture such that the conductive pin extends through the ferrule;
receiving an insulating member configured to electrically insulate the conductive pin from the ferrule within the aperture and around at least a portion of the conductive pin such that at least a portion of the insulating member is positioned between the ledge and the outer end surface of the ferrule;
heating the insulating member such that the insulating member melts and flows into contact with the conductive pin; and
discontinuing heating of the insulating member and allowing the insulating member to re-solidify,
wherein the insulating member is configured lift from the ledge such that the ledge and a surface of the insulating member adjacent the ledge define a space therebetween.