Patent ID: 6099600
Filing Date: 2000-08-08
Classification: A61N,H01G

Abstract:
A method of making a flat electrolytic capacitor, the capacitor comprising a plurality of substantially flat cathode layers formed of cathode foil, a plurality of substantially flat anode sub-assemblies, each anode sub-assembly being formed of a plurality of anode layers formed of anode foil, a plurality of substantially flat separator layers formed of separator material, the separator layers being disposed between alternating sequences of vertically stacked and adjoining cathode layers and anode sub-assemblies, the vertically stacked separator layers, cathode layers and anode sub-assemblies forming an electrode assembly, the capacitor further comprising a case having sidewalls extending upwardly from a flat substantially planar base to form an open end, the case or cover having a fill port disposed through the sidewalls, base or surfaces thereof, the fill port being sealed, the electrode assembly being disposed within the open end inside the case, the cover sealing the open end of the case, the method comprising the steps of:(a) providing the case;(b) providing the cover;(c) providing the electrode assembly;(d) disposing the electrode assembly in the case;(e) sealing the case with the cover to form the capacitor,(f) placing the capacitor in a vacuum chamber,(g) introducing electrolyte within the case through the fill port;(h) in a first vacuum creating step, creating a first vacuum in the chamber;(i) in a first venting step, venting the chamber, and(j) sealing the fill port.