Implantable medical devices (IMDS) and their various components, including
flat electrolytic capacitors for same, and methods of making and using same, particularly
an improved electrolytic capacitor. Methods and apparatus for securely mechanically
and electrically attaching anode sheets of multi-sheet anode layers of electrolytic
capacitors together in a simple manner that does not without unduly damage adjacent
or exposed oxide layers are disclosed. The side-by-side stacked multiple anode
sheets of a multi-sheet anode layer are joined together by precision cold welding
the anode sheets together wherein deformation of the anode sheets is effected by
simultaneously driving one or more set of first and second axially aligned cold
weld pins into respective first and second stack sides of the stacked anode sheets
to substantially equal cold weld depths.
