US 7,321,486 B2
Electric double layer capacitor
Masaaki Nemoto, Kyoto (Japan); Koji Endo, Hirakata (Japan); Kikuko Kato, Hirakata (Japan); Yasuo Nakahara, Hirakata (Japan); and Hiroshi Nonoue, Hirakata (Japan)
Assigned to Sanyo Electric Co., Ltd., Moriguchi (Japan)
Filed on Jan. 31, 2007, as Appl. No. 11/700,833.
Claims priority of application No. 2006-097092 (JP), filed on Mar. 31, 2006.
Prior Publication US 2007/0274024 A1, Nov. 29, 2007
Int. Cl. H01G 9/155 (2006.01); H01G 4/008 (2006.01); H01G 9/00 (2006.01)
U.S. Cl. 361—305  [361/502; 361/533] 9 Claims
OG exemplary drawing
 
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.