Reaction vessel for producing capacitor element, production method for capacitor element, capacitor element and capacitor

A method for producing a capacitor element, using a reaction vessel comprising two or more negative electrode plates each corresponding to individual electric conductors and two or more constant current sources electrically connected to individual negative electrode plates, which comprises filling the reaction vessel with an electrolyte, immersing in the electrolyte two or more electric conductors each having formed on the surface thereof a dielectric layer, and forming a semiconductor layer on the dielectric layer by passing an electric current through the electrolyte,

• wherein the electric conductors are connected as a positive electrode and individual negative electrodes disposed in the reaction vessel are connected as a negative electrode,
• wherein a constant electric current passes through individual ones of the two or more electric conductors in forming the semiconductor layer, and
• wherein the reaction vessel comprises a plurality of partition compartments, individual ones of the negative electrode plates are disposed in respective partition compartments of the reaction vessel, and said method comprises immersing individual ones of the electric conductors into an electrolyte in the respective partition compartments of the reaction vessel.