Implantable medical device having flat electrolytic capacitor with laser welded cover
First Claim
Patent Images
1. A hermetically sealed implantable medical device, comprising:
- (a) a hermetically sealed housing;
(b) an energy source disposed within the housing;
(c) a substantially flat electrolytic capacitor electrically connected to the energy source and disposed within the housing, the capacitor comprising;
(i) at least one flat cathode layer formed of cathode foil;
(ii) a plurality of flat anode layers formed of anode foil, the plurality of anode layers forming an anode sub-assembly having top and bottom surfaces;
(iii) at least a first separator layer formed of separator material;
(iv) an electrolyte;
(v) a case having inner and outer sidewalls extending upwardly from a flat planar base to form an open end terminating in an upper edge disposed between the inner and outer sidewalls and extending around the periphery of the case;
(vi) a substantially planar cover for sealing the open end of the case, the cover comprising upper and lower surfaces separated by an outer edge, the lower surface of the cover having disposed thereon at least one of a groove and a stepped portion, the at least one of the groove or the stepped portion being disposed radially inward from the outer edge, outer portions of the cover extending between the outer edge and the groove or the stepped portion, the outer portions of the cover being crimped or folded downwardly over at least portions of the outer sidewall of the case to form a joint after the cover is placed on the open end of the can, the joint being laser welded to hermetically seal the cover to the case; and
wherein the at least one cathode layer, the plurality of anode layers and the first separator layer are vertically stacked in the case such that the first separator layer is disposed between the at least one cathode layer and the anode sub-assembly, and the electrolyte is disposed inside the case.
0 Assignments
0 Petitions
Accused Products
Abstract
An implantable medical device such as a defibrillator is described. The device includes an hermetically sealed housing containing a flat electrolytic capacitor and an energy source such as a battery. The battery is connected to the capacitor and provides charge thereto. The capacitor stores the charge at a relatively high voltage. The charge stored in the capacitor is discharged through a defibrillation lead to a site on or in the heart when fibrillation of the heart is detected by the implantable medical device. Methods of making and using the implantable medical device, the capacitor, and their various components are disclosed.
193 Citations
30 Claims
-
1. A hermetically sealed implantable medical device, comprising:
-
(a) a hermetically sealed housing;
(b) an energy source disposed within the housing;
(c) a substantially flat electrolytic capacitor electrically connected to the energy source and disposed within the housing, the capacitor comprising;
(i) at least one flat cathode layer formed of cathode foil;
(ii) a plurality of flat anode layers formed of anode foil, the plurality of anode layers forming an anode sub-assembly having top and bottom surfaces;
(iii) at least a first separator layer formed of separator material;
(iv) an electrolyte;
(v) a case having inner and outer sidewalls extending upwardly from a flat planar base to form an open end terminating in an upper edge disposed between the inner and outer sidewalls and extending around the periphery of the case;
(vi) a substantially planar cover for sealing the open end of the case, the cover comprising upper and lower surfaces separated by an outer edge, the lower surface of the cover having disposed thereon at least one of a groove and a stepped portion, the at least one of the groove or the stepped portion being disposed radially inward from the outer edge, outer portions of the cover extending between the outer edge and the groove or the stepped portion, the outer portions of the cover being crimped or folded downwardly over at least portions of the outer sidewall of the case to form a joint after the cover is placed on the open end of the can, the joint being laser welded to hermetically seal the cover to the case; and
wherein the at least one cathode layer, the plurality of anode layers and the first separator layer are vertically stacked in the case such that the first separator layer is disposed between the at least one cathode layer and the anode sub-assembly, and the electrolyte is disposed inside the case. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A substantially flat electrolytic capacitor, comprising:
-
(a) at least one flat cathode layer formed of cathode foil;
(b) a plurality of flat anode layers formed of anode foil, the plurality of anode layers forming an anode sub-assembly having top and bottom surfaces;
(c) at least a first separator layer formed of separator material;
(d) an electrolyte;
(e) a case having inner and outer sidewalls extending upwardly from a flat planar base to form an open end terminating in an upper edge disposed between the inner and outer sidewalls;
(f) a substantially planar cover for sealing the open end of the case, the cover comprising upper and lower surfaces separated by an outer edge, the lower surface of the cover having disposed thereon at least one of a groove and a stepped portion, the at least one of the groove or the stepped portion being disposed radially inward from the outer edge, outer portions of the cover extending between the outer edge and the groove or the stepped portion, the outer portions of the cover being crimped or folded downwardly over at least portions of the outer sidewall of the case to form a joint after the cover is placed on the open end of the can, the joint being laser welded to hermetically seal the cover to the case; and
wherein the at least one cathode layer, the plurality of anode layers and the first separator layer are vertically stacked in the case such that the first separator layer is disposed between the at least one cathode layer and the anode sub-assembly, and the electrolyte is disposed inside the case. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
-
Specification