An electrolytic capacitor includes an anode body having a dielectric layer; a solid electrolyte layer in contact with the dielectric layer of the anode body; and an electrolytic solution. The electrolytic solution contains a solvent and a solute. The solvent contains a glycol compound. The solute contains an acid component and a base component. A mass of the acid component in the solute is greater than a mass of the base component in the solute. The acid component contains a first aromatic compound having a hydroxyl group.

A solid electrolytic capacitor comprising an anode body having pores, a dielectric, a first conductive polymer layer and a second conductive polymer layer is provided. The dielectric is formed on a surface of the anode body. The first conductive polymer layer includes a first conductive polymer having at least one of structural units represented by the following formula (1) and the following formula (2) and is formed on the dielectric. In the formulas (1) and (2), R.sup.1 is an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, an alkylene oxide group having 1 to 12 carbon atoms, an aromatic group, or a heterocyclic group, each of which optionally has a substituent, A.sup.− is a monoanion derived from a dopant and n is 2 or more and 300 or less.

A solid electrolytic capacitor comprising an anode body having pores, a dielectric, a first conductive polymer layer and a second conductive polymer layer is provided. The dielectric is formed on a surface of the anode body. The first conductive polymer layer includes a first conductive polymer having at least one of structural units represented by the following formula (1) and the following formula (2) and is formed on the dielectric. In the formulas (1) and (2), R.sup.1 is an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, an alkylene oxide group having 1 to 12 carbon atoms, an aromatic group, or a heterocyclic group, each of which optionally has a substituent, A.sup.− is a monoanion derived from a dopant and n is 2 or more and 300 or less.

A solid electrolytic capacitor comprises a capacitor element including a valve-acting metal substrate including a core part and a porous part disposed on at least one principal surface of the core part, a dielectric layer formed on a surface of the porous part and a solid electrolyte layer is disposed on the dielectric layer. The capacitor element further includes a conductive layer disposed on the solid electrolyte layer. A sealing resin is located on the conductive layer and seals a principal surface of the capacitor element. A cathodic outer electrode is located on the sealing resin and is electrically connected to the conductive layer by a cathodic via electrode which extends through the sealing resin. An anodic outer electrode is electrically connected to the core part.

A solid electrolytic capacitor comprises a capacitor element including a valve-acting metal substrate including a core part and a porous part disposed on at least one principal surface of the core part, a dielectric layer formed on a surface of the porous part and a solid electrolyte layer is disposed on the dielectric layer. The capacitor element further includes a conductive layer disposed on the solid electrolyte layer. A sealing resin is located on the conductive layer and seals a principal surface of the capacitor element. A cathodic outer electrode is located on the sealing resin and is electrically connected to the conductive layer by a cathodic via electrode which extends through the sealing resin. An anodic outer electrode is electrically connected to the core part.

Disclosed are tantalum capacitors having enhanced volumetric efficiency, effective series resistance, effective series inductance, and high frequency performance when compared to existing tantalum capacitors. Also disclosed is a screening process for tantalum capacitors to enhance reliability.

Disclosed are tantalum capacitors having enhanced volumetric efficiency, effective series resistance, effective series inductance, and high frequency performance when compared to existing tantalum capacitors. Also disclosed is a screening process for tantalum capacitors to enhance reliability.

A method of manufacturing a solid electrolytic capacitor, including: a step (A) of providing a conjugated conductive polymer-containing dispersion by polymerizing, in a dispersion medium containing seed particles turned into protective colloid by a polyanion or in a dispersion medium containing the polyanion, a monomer for obtaining a conjugated conductive polymer; a step (B) of preparing a dispersion containing a morpholine compound and the conjugated conductive polymer by adding the morpholine compound to the conjugated conductive polymer-containing dispersion; a step (C) of causing the dispersion to adhere to a porous anode body formed of a valve metal having a dielectric film on a surface thereof; and a step (D) of forming a solid electrolyte layer by removing the dispersion medium from the dispersion containing the morpholine compound and the conjugated conductive polymer, the dispersion adhering to the porous anode body.

A method of manufacturing a solid electrolytic capacitor, including: a step (A) of providing a conjugated conductive polymer-containing dispersion by polymerizing, in a dispersion medium containing seed particles turned into protective colloid by a polyanion or in a dispersion medium containing the polyanion, a monomer for obtaining a conjugated conductive polymer; a step (B) of preparing a dispersion containing a morpholine compound and the conjugated conductive polymer by adding the morpholine compound to the conjugated conductive polymer-containing dispersion; a step (C) of causing the dispersion to adhere to a porous anode body formed of a valve metal having a dielectric film on a surface thereof; and a step (D) of forming a solid electrolyte layer by removing the dispersion medium from the dispersion containing the morpholine compound and the conjugated conductive polymer, the dispersion adhering to the porous anode body.

Solvent free epoxy system that includes: a hardener compound H comprising: a molecular structure (Y.sup.1—R.sub.1—Y.sup.2), wherein R.sub.1 is an ionic moiety Y.sup.1 is a nucleophilic group and Y.sup.2 nucleophilic group; and an ionic moiety A acting as a counter ion to R.sub.1; and an epoxy compound E comprising: a molecular structure (Z.sup.1R.sub.2—Z.sup.2), wherein R.sub.1 is an ionic moiety, Z.sup.1 comprises an epoxide group, and Z.sup.2 comprises an epoxide group; and an ionic moiety B acting as a counter ion to R.sub.2. In embodiments, the epoxy compound E and/or the hardener H is comprised in a solvent-less ionic liquid. The systems can further include accelerators, crosslinkers, plasticizers, inhibitors, ionic hydrophobic and/or super-hydrophobic compounds, ionic hydrophilic compounds, ionic transitional hydrophobic/hydrophilic compounds, biological active compounds, and/or plasticizer compounds. Polymers made from the disclosed epoxy systems and their methods of used.