Feedthrough assembly with feature for controlling component position

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.