Patent ID: 9138821
Filing Date: 2015-09-22
Classification: B23K,H01G,H01R

Abstract:
1. A method for simultaneously brazing a ferrule and lead pins comprising: providing a feedthrough comprising a ceramic insulator having at least one conductive via, the at least one via having a contact pad on a surface of the ceramic insulator, a ferrule surrounding the ceramic insulator and a ferrule braze preform around the ceramic insulator and between the ferrule and the ceramic insulator; providing at least one lead pin having a head at a proximal end and having a distal end, and a lead pin braze preform attached to the head; providing a freestanding lead pin fixture comprising a plurality of lead pin fixture holes through the lead pin fixture, the holes configured to accept insertion of the at least one lead pin, the freestanding lead pin fixture configured to be placed over the feedthrough such that the at least one fixtured lead pin and attached braze preform are aligned and in contact with the contact pad on the surface of the ceramic insulator; inserting the at least one lead pin into the at least one lead pin fixture holes; placing said freestanding lead pin fixture over the feedthrough such that the at least one fixtured lead pin and attached braze preform are aligned and in contact with the contact pad on the surface of the ceramic insulator to form a feedthrough assembly; and heating the feedthrough assembly at a temperature and for a time sufficient to form brazed joints between the ferrule and the ceramic insulator and the at least one lead pin and the contact pad.