Andrew R Jacobs

US Patent:

6678559, Jan 13, 2004

Filed:

Mar 20, 2000

Appl. No.:

09/531352

Inventors:

Mark D. Breyen - Plymouth MN
Dan C. Haeg - Champlin MN
Andrew M. Jacobs - Eden Prairie MN

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

A61N 118

US Classification:

607 5, 361503

Abstract:

An implantable medical device comprising a housing, a capacitor assembly, an electronics module and an energy source, such as a battery. The capacitor assembly is disposed within the housing. The electronics module is electrically connected to the capacitor assembly and similarly disposed within the housing. The capacitor assembly comprising a case, an electrode stack and an insulative liner between the case and the electrode stack. The capacitor assembly electrode stack comprising a plurality of electrode subassemblies each having a plurality of anode plates and a plurality of cathode plates with a separation layer between anode and cathode plates. The liner also maintains alignment and immobilizes the electrode stack within the capacitor assembly. Finally, the energy source is electrically connected to the electronics module. With this configuration, an overall shape and size of the implantable medical device is optimized.

US Patent:

6795729, Sep 21, 2004

Filed:

Jun 30, 2000

Appl. No.:

09/608204

Inventors:

Mark D. Breyen - Plymouth MN
Andrew Michael Jacobs - Eden Prairie MN
Anthony W. Rorvick - Brooklyn Park MN
Paul A. Pignato - Stacy MN

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

A61N 140

US Classification:

607 5

Abstract:

Flat electrolytic capacitors, particularly, for use in implantable medical devices (IMDs), and the methods of fabrication of same are disclosed. The capacitors are formed with an electrode stack assembly comprising a plurality of stacked capacitor layers each comprising an anode sub-assembly of at least one anode layer, a cathode layer and separator layers wherein the anode and cathode layers have differing dimensions that avoid electrical short circuits between peripheral edges of adjacent anode and cathode layers but maximize anode electrode surface area. The electrolytic capacitor is formed of a capacitor case defining an interior case chamber and case chamber periphery, an electrode stack assembly of a plurality of stacked capacitor layers having anode and cathode tabs disposed in the interior case chamber, an electrical connector assembly for providing electrical connection with the anode and cathode tabs through the case, a cover, and electrolyte filling the remaining space within the interior case chamber. The plurality of capacitor layers and further separator layers are stacked into the electrode stack assembly and disposed within the interior case chamber such that the adjacent anode and cathode layers are electrically isolated from one another. The anode layer peripheral edges of the anode sub-assemblies of the stacked capacitor layers extend closer to the case side wall than the cathode peripheral edges of the cathode layers of the stack of capacitor layers throughout a major portion of the case chamber periphery.

US Patent:

6963482, Nov 8, 2005

Filed:

Aug 13, 2004

Appl. No.:

10/918061

Inventors:

Mark D. Breyen - Plymouth MN, US
Andrew Michael Jacobs - Eden Prairie MN, US
Anthony W. Rorvick - Brooklyn Park MN, US
Paul A. Pignato - Stacy MN, US

Assignee:

Medtronic, Inc. - Minneapolia MN

International Classification:

H01G004/35

US Classification:

361302, 361516, 361532, 607 5

Abstract:

Flat electrolytic capacitors, particularly, for use in implantable medical devices (IMDs), and the methods of fabrication of same are disclosed. The capacitors are formed with an electrode stack assembly comprising a plurality of stacked capacitor layers each comprising an anode sub-assembly of at least one anode layer, a cathode layer and separator layers wherein the anode and cathode layers have differing dimensions that avoid electrical short circuits between peripheral edges of adjacent anode and cathode layers but maximize anode electrode surface area. The electrolytic capacitor is formed of a capacitor case defining an interior case chamber and case chamber periphery, an electrode stack assembly of a plurality of stacked capacitor layers having anode and cathode tabs disposed in the interior case chamber, an electrical connector assembly for providing electrical connection with the anode and cathode tabs through the case, a cover, and electrolyte filling the remaining space within the interior case chamber. The plurality of capacitor layers and further separator layers are stacked into the electrode stack assembly and disposed within the interior case chamber such that the adjacent anode and cathode layers are electrically isolated from one another. The anode layer peripheral edges of the anode sub-assemblies of the stacked capacitor layers extend closer to the case side wall than the cathode peripheral edges of the cathode layers of the stack of capacitor layers throughout a major portion of the case chamber periphery.

US Patent:

7110240, Sep 19, 2006

Filed:

Aug 3, 2005

Appl. No.:

11/196142

Inventors:

Mark D. Breyen - Plymouth MN, US
Andrew Michael Jacobs - Eden Prairie MN, US
Anthony W. Rorvick - Brooklyn Park MN, US
Paul A. Pignato - Stacy MN, US

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

H01G 4/35

US Classification:

361302, 361516, 361532, 607 5

Abstract:

A capacitor is described. The capacitor includes a case chamber. An electrode stack assembly is disposed within the case chamber. The electrode stack assembly includes a layer. The layer includes an anode subassembly. The anode subassembly comprises at least one anode layer that has an anode edge disposed at a first distance from an interior wall of the case chamber. The layer also includes a capacitor layer. The capacitor layer includes a cathode edge disposed at a second distance from the wall interior. The second distance is greater than the first distance.