Patent ID: 7321486
Filing Date: 2008-01-22
Classification: H01G,Y02E

Abstract:
1. An electric double layer capacitor comprising; a container having a lid and a containing portion comprised of an insulating material, an electric double layer capacitor element having a first electrode and a second electrode arranged to face each other inside of said container through a separator; and an electrolytic solution in said container; wherein said containing portion comprises; a first conductive layer formed on an inner face of said containing portion; an insulating layer formed to cover said first conductive layer; an opening portion that reaches from a surface of said insulating layer to said first conductive layer; a second conductive layer located inside of said opening portion; and a third conductive layer formed onto said insulating layer and said second conductive layer, and electrically connected to said first electrode; wherein said third conductive layer includes a first layer comprised of a valve metal formed on said insulating layer and said second conductive layer, and a second layer comprised of carbon formed on said first conductive layer.