Method of manufacturing feedthrough

• US 10,213,611 B2
• Filed: 06/29/2016
• Issued: 02/26/2019
• Est. Priority Date: 06/30/2015
• Status: Active Grant

• Current Assignee: Osong Medical Innovation Foundation
• Original Assignee: Osong Medical Innovation Foundation
• Inventors: Kim, Jin-Won, Moon, Jin-Hee, Song, In-Ho, Yoo, Sung-Keun, Lee, Seung-A, Jung, Ha-Chul, Moon, Dong-Jun, Ahn, Jin-Woo, Lee, Sang-Hun
• Primary Examiner(s): Stoner, Kiley S
• Application Number:
  US15/739,982
• Publication Number:
  US 20180185654A1
• Time in Patent Office: 972 Days
• Field of Search: 228193-195, 21912165-12172
• CPC Class Codes: A61N 1/375 Constructional arrangements, e.g. casings
• CPC Class Codes: A61N 1/3754 Feedthroughs
• CPC Class Codes: B23K 20/02 by means of a press ; Diffusion bonding B23K20/001, B23K20/04 take precedence
• CPC Class Codes: B23K 26/38 by boring or cutting
• CPC Class Codes: H01G 4/35 Feed-through capacitors or anti-noise capacitors
• CPC Class Codes: H01R 2201/12 for medicine and surgery

Abstract

A method of manufacturing a feedthrough having an enhanced hermetic sealing and used for a human implantable medical device such as a deep brain stimulator, a implantable AED, a implantable spinal cord stimulator and so on. Thus, more enhanced reproducibility and productivity in the diffusion welding and the laser hole machining may be guaranteed in the present method of manufacturing the feedthrough, compared to the conventional method using the ceramic metallizing and the brazing.

Claims

1. A method of manufacturing a feedthrough comprising:

mounting a ceramic structure on a mounting groove of a lower jig, the ceramic structure having a plurality of grooves formed uniformly;

inserting a platinum/iridium pin formed of platinum and iridium into the grooves of the ceramic structure;

disposing a titanium flange on the ceramic structure, to form a feedthrough structure having the ceramic structure, the platinum/iridium pin and the titanium flange;

disposing the feedthrough structure on a groove of an upper jig and pressing the feedthrough structure, so that the upper jig is combined with the mounting groove of the lower jig and moves toward a diffusion chamber, for diffusion welding the ceramic structure of the feedthrough structure, the platinum/iridium pin and the titanium flange with each other;

decreasing a temperature of the diffusion chamber for cooling the feedthrough structure welded with each other;

disposing the ceramic structure of the feedthrough structure to face a laser machining device;

irradiating a laser to the ceramic structure into which the platinum/iridium pin is inserted, to form a hole in the ceramic structure; and

moving a melted platinum/iridium pin toward an upper side of the ceramic structure through the hole of the ceramic structure, so that the platinum/iridium pin is partially exposed through the upper side of the ceramic structure.

2. The method of claim 1, wherein an end portion of the platinum/iridium pin is in a line with an end portion of the titanium flange.

3. The method of claim 1, wherein the upper jig and the lower jig include ceramic.

4. The method of claim 1, wherein the ceramic structure is partially exposed through an outside of the upper jig, when the upper jig is combined with the lower jig.

5. The method of claim 1, wherein the ceramic structure includes a plurality of flow-blocking grooves formed on a surface of the ceramic structure, to block the melted platinum/iridium pin from being flowed on the surface of the ceramic structure.