Flat capacitor for an implantable medical device

• US 10,032,565 B2
• Filed: 11/23/2016
• Issued: 07/24/2018
• Est. Priority Date: 11/03/2000
• Status: Expired due to Term

• Current Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Original Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Inventors: O'Phelan, Michael J., Schmidt, Brian L., Poplett, James M., Tong, Robert R., Kavanagh, Richard J., Iyer, Rajesh, Barr, Alexander G., Christenson, Luke J., Waytashek, Brian V., Schenk, Brian D., Sherwood, Gregory J.
• Primary Examiner(s): Thomas, Eric
• Assistant Examiner(s): Ramaswamy, Arun
• Application Number:
  US15/359,968
• Publication Number:
  US 20170076874A1
• Time in Patent Office: 608 Days
• Field of Search: 361503, 361505, 361508, 361516, 361520, 361517, 429152
• CPC Class Codes: A61N 1/3754 Feedthroughs
• CPC Class Codes: A61N 1/378 Electrical supply
• CPC Class Codes: A61N 1/3782 producing a voltage above the power source level
• CPC Class Codes: H01G 9/00 Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
• CPC Class Codes: H01G 9/008 Terminals
• CPC Class Codes: H01G 9/02 Diaphragms; Separators
• CPC Class Codes: H01G 9/035 Liquid electrolytes, e.g. impregnating materials H01G11/54 takes precedence
• CPC Class Codes: H01G 9/045 based on aluminium
• CPC Class Codes: H01G 9/055 Etched foil electrodes
• CPC Class Codes: H01G 9/06 Mounting in containers
• CPC Class Codes: H01G 9/07 Dielectric layers
• CPC Class Codes: H01G 9/08 Housing; Encapsulation
• CPC Class Codes: H01G 9/10 Sealing, e.g. of lead-in wires
• CPC Class Codes: H01G 9/145 Liquid electrolytic capacitors H01G11/00 takes precedence
• CPC Class Codes: H01G 9/28 Structural combinations of electrolytic capacitors, rectifiers, detectors, switching devices with other electric components not covered by this subclass

Abstract

One aspect provides a capacitor feedthrough assembly having an electrically conductive member dimensioned to extend at least partially through a feedthrough hole of a case of the capacitor, the conductive member having a passage therethrough.

Claims

1. A capacitor comprising:

one or more anodes;

a cathode structure comprising a plurality of integrally connected cathode plates, the cathode structure having a serpentine shape, interweaving under and over each of the one or more anodes, wherein each of the one or more anodes is located between a pair of adjacent cathode plates; and

a plurality of separators, at least one of the plurality of separators is located between each of the one or more anodes and each of the plurality of cathode plates; and

an aluminum case having an etched inner surface, and a lid having an etched inner surface attached to the case, wherein the anodes and cathode structure are disposed within the case;

wherein the cathode structure is electrically coupled to a cathode conductive tab, and the cathode conductive tab has at least a portion positioned between the case and the lid, wherein the cathode stacks are electrically coupled with the etched inner surfaces of the case and the lid.

2. The capacitor of claim 1, wherein the plurality of cathode plates are arranged to form an s-shaped profile.

3. The capacitor of claim 1, wherein the cathode structure comprises a single foil.

4. The capacitor of claim 1, wherein a first anode is disposed adjacent to one of the etched inner surfaces, the first anode having a major surface facing one of the etched inner surfaces and having an electrolyte saturated separator disposed between one of the etched inner surfaces and the major surface.

5. The capacitor of claim 1, wherein each of the plurality of cathode plates is integrally attached to its neighboring plates at a fold area, each of the cathode plates having a major surface, wherein when the cathode is folded at each fold area, the major surface of each cathode plate is substantially parallel to a major surface of an adjacent cathode plate.

6. The cathode of claim 5, wherein the plurality of cathode plates are cut from a single aluminum sheet.

7. The cathode of claim 6, wherein the plurality of cathode plates are foldable to form an s-shaped profile.