Patent ID: 6916706

Claim:
A method for producing a capacitor sheet comprising: a laminate sheet having at least one laminate that is composed of a power source layer electrode, a grounding layer electrode, and a dielectric layer interposed between the power source layer electrode and the grounding layer electrode; interface-connection feedthrough conductors for electrically connecting faces of the laminate sheet, the interface-connection feedthrough conductors being formed in through holes that pass through the dielectric layer, the power source layer electrode, and the grounding layer electrode, and being insulated by insulation walls from the power source layer electrode and the grounding layer electrode provided inside; and capacitor-connection feedthrough conductors that are formed in regions where only either the power source layer electrode or the grounding layer electrode is provided, and that are connected electrically with either the power source layer electrode or the grounding layer electrode; the method comprising the step of forming the interface-connection feedthrough conductors, wherein said step includes sub-steps of: forming large-diameter perforations in the laminate sheet; filling an insulator in the large-diameter perforations; forming small-diameter perforations in the large-diameter perforations filled with the insulator; and providing feedthrough conductors in the small-diameter perforations.