Electric double layer capacitor and method for preparing the...

Metal working – Barrier layer or semiconductor device making – Barrier layer device making

Reexamination Certificate

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C427S079000, C427S080000

Reexamination Certificate

active

06843810

ABSTRACT:
An electric double layer capacitor is disclosed which is capable of preventing transmission of an electrolytic solution vaporized in a basic cell through current collectors and capable of improving a yield. A method for preparing the electric double layer capacitor is also disclosed. The electric double layer capacitor comprises a basic cell prepared by the steps of: applying a current collector onto a surface of a substrate; disposing an electrically insulating gasket element on the surface the substrate in such a manner that the current collector laterally abuts on the gasket element to define a concavity; placing a polarizable electrode impregnated with an electrolytic solution on the surface of the current collector; oppositely disposing two intermediate products prepared through the foregoing steps on a separator in such a manner that the gasket elements abut on surfaces of a peripheral portion of the separator; fusion-bonding the gasket elements together to laterally cover the separator with the resulting unified gasket; and removing the substrates from the current collectors and the gasket. The substrate has a vapor transmission rate of a predetermined one or lower with respect to the electrolytic solution vaporized at a temperature of the fusion-bonding.

REFERENCES:
patent: 5072335 (1991-12-01), Kurabayashi et al.
patent: 5786981 (1998-07-01), Aoki et al.
patent: 6324049 (2001-11-01), Inagawa et al.
patent: 6356433 (2002-03-01), Shi et al.
patent: 6377441 (2002-04-01), Ohya et al.
patent: 6625007 (2003-09-01), Sakata et al.
patent: 6741450 (2004-05-01), Nakazawa et al.
patent: 10-004033 (1998-01-01), None
patent: 10-004034 (1998-01-01), None
patent: WO 9840435 (1998-09-01), None
patent: WO 9902585 (1999-01-01), None

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