Solid electrolytic capacitor and method of manufacturing capacitor
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United States of America Patent
Stats
-
Aug 10, 2004
Grant Date -
Jul 8, 2004
app pub date -
Oct 22, 2003
filing date -
Oct 25, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A dielectric layer is formed on a surface of a porous portion formed at least on a surface of a valve metal sheet. A solid electrolyte layer is formed on the dielectric layer, and a collector layer is formed on the solid electrolyte layer. A first insulating portion is formed on an outer periphery of the dielectric layer, and a solid electrolyte layer is formed on a portion of the dielectric layer corresponding to an opening of the first insulating portion. A portion of the solid electrolyte layer is formed on the first insulating portion. A second insulating portion is formed on the first insulating portion and on the outer periphery of the solid electrolyte layer. A collector layer is formed on a surface of the solid electrolyte layer exposed through an opening of the second insulating portion, thus providing a solid electrolytic capacitor. The solid electrolytic capacitor has less current leakage and a high withstand voltage.
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