US 8,014,127 B2 · Solid electrolytic capacitor

Abstract

In a solid electrolytic capacitor, a capacitor element laminate formed by stacking capacitor elements each using a valve metal as an anode body is bonded to a substrate by a conductive adhesive and packaged by a resin portion. The substrate includes a printed substrate made of an epoxy resin. On its mounting surface for the capacitor element laminate, there are provided an anode mounting portion and a cathode mounting portion each made of a copper base material. The anode mounting portion and the cathode mounting portion are electrically connected to an external anode terminal and an external cathode terminal, respectively, formed on the mounting surface of the solid electrolytic capacitor, through anode vias and cathode vias each penetrating through the epoxy resin. A part of the anode mounting portion on the substrate (6) extends to the outside of the packaging resin portion.

Claims12

Dependent claims

A solid electrolytic capacitor in which a capacitor element is mounted on a substrate and covered with a packaging resin,

wherein said capacitor element comprises an anode portion formed by a partial region of a valve metal base, a dielectric layer in the form of an oxide film formed at a roughened surface of said valve metal base and separated from said anode portion by an insulator portion, and a cathode portion including a conductive polymer layer and a conductor layer formed in this order on said dielectric layer, and
a path for water vapor or water molecules leading from the outside to the inside of said solid electrolytic capacitor is formed between said packaging resin and a surface of said substrate.

Dependencies are inferred from the claim text.

Solid electrolytic capacitor

Life of this patent

Solid electrolytic capacitor

Life of this patent

Abstract

Claims12