Abstract: A noise filter (1) has a first impedance element (2) having an impedance value Z1, a second impedance element (3) having an impedance value Z2, a third impedance element (4) having an impedance value Z3, a first anode terminal (5), a second anode terminal (6), and a cathode terminal (7). Z1<Z2 and Z1<Z3 are satisfied. Both ends of a central conductor (2a) of the first impedance element (2) are connected to a first node (8) and a second node (9), respectively. Both ends of the second impedance element (3) are connected to the first node (8) and the first anode terminal (5), respectively. Both ends of the third impedance element (4) are connected to the second anode terminal (6) and the second node (9), respectively. The central conductor (2a) and a cathode conductor (2b) of the first impedance element (2) form a transmission line structure having the impedance value Z1. The cathode conductor (2b) is connected to the cathode terminal (7).

Abstract: The invention provides a solid electrolytic capacitor of a configuration having a metal plated layer in a cathode part in order to prevent a decrease in the conductivity by oxidation of a conductive polymer and to realize a high reliability. Also there is provided a configuration in which a cathode part of the solid electrolytic capacitor includes a first metal plated layer and a solderable second metal layer.

Abstract: In a laminated solid electrolytic capacitor comprising a plurality of solid electrolytic capacitor elements, first end regions of anode bodies of the solid electrolytic capacitor elements adjacent to each other are mechanically connected to each other through a spacer. First end surfaces of the anode bodies of the solid electrolytic capacitor elements adjacent to each other are electrically connected to each other through an electrically conductive member.

Abstract: A transmission line type noise filter includes a metal fine wire (1) made of valve-operational metal and serving as a central conductor, a capacitance forming portion (3) formed over a predetermined length on the periphery of the metal fine wire, and a conductor layer (2) formed on the surface of the capacitance forming portion and serving as an external conductor. The capacitance forming portion (3) includes a sintered body (11) formed on the metal fine wire and made of the foregoing valve-operational metal, a dielectric film (31) formed on the surface of the sintered body and serving as a dielectric, and a solid electrolyte layer (23) formed on the surface of the dielectric film.

Abstract: An external cathode terminal (16) is adhered to one surface of a capacitor element while a prepreg (25) is adhered to another surface of the capacitor element. A reinforcement plate (26) is adhered to the prepreg. Heat and pressure are applied to the external cathode terminal, the prepreg, and the reinforcement plate to elute thermosetting resin from the prepreg in the side of the capacitor element, thereby sealing the side of the capacitor element with eluted material (27A, 27B). Inasmuch as transfer molding is not used as exterior package, the element never deforms by injection pressure of resin. It is possible to thin by a thickness of exterior package resin. Inasmuch as eluted thermosetting resin does not include a mold release agent, it has good adhesion for the external cathode terminal.

Abstract: An external cathode terminal (16) is adhered to one surface of a capacitor element while a prepreg (25) is adhered to another surface of the capacitor element. A reinforcement plate (26) is adhered to the prepreg. Heat and pressure are applied to the external cathode terminal, the prepreg, and the reinforcement plate to elute thermosetting resin from the prepreg in the side of the capacitor element, thereby sealing the side of the capacitor element with eluted material (27A, 27B). Inasmuch as transfer molding is not used as exterior package, the element never deforms by injection pressure of resin. It is possible to thin by a thickness of exterior package resin. Inasmuch as eluted thermosetting resin does not include a mold release agent, it has good adhesion for the external cathode terminal.

Abstract: In a stacked solid electrolytic capacitor or a stacked transmission line element, anode portions of adjacent elements are electrically and mechanically connected to each other by the use of connecting members each in the form of a conductive adhesive or solderable metal, via metal plates connected to the anode portions so as to sandwich therebetween the anode portions, respectively, from the upper and lower surfaces thereof. On the other hand, cathode portions of the adjacent elements are electrically and mechanically connected to each other by a conductive adhesive, or are electrically and mechanically connected to each other by the use of adhesive insulating sheets each having a hollowed portion and a conductive adhesive filled in the hollowed portions, or are adhered to each other by adhesive insulating sheets, then electrically connected to each other by a conductive adhesive applied onto side surfaces of the cathode portions.

Abstract: The invention provides a solid electrolytic capacitor of a configuration having a metal plated layer in a cathode part in order to prevent a decrease in the conductivity by oxidation of a conductive polymer and to realize a high reliability. Also there is provided a configuration in which a cathode part of the solid electrolytic capacitor includes a first metal plated layer and a solderable second metal layer.

Abstract: A transmission line type noise filter connectable between a direct current power supply (70) and an electrical load component (80) to pass a coming DC current while attenuating a coming AC current comprises a first conductor (11), a dielectric layer (30), a second conductor (20) as a cathode, a first anode (12), and a second anode (13). The first and the second conductors (11, 20) and the dielectric layer (30) serve as a capacitance forming portion (50). The thickness (t) of the first conductor (11) is selected to substantially restrict temperature elevation of the first conductor (11), which is caused by DC direct current flowing in the first conductor (11).

Abstract: In an electronic circuit having an integrated circuit (110) having a power supply terminal, a noise filter disposed adjacent to the integrated circuit, and a printed board (101) having a pattern for supplying a power supply to the power supply terminals of the integrated circuit through the noise filter, the noise filter consists of a transmission line type noise filter (121-124) for removing noises having a wide frequency band.

Abstract: An external cathode terminal (16) is adhered to one surface of a capacitor element while a prepreg (25) is adhered to another surface of the capacitor element. A reinforcement plate (26) is adhered to the prepreg. Heat and pressure are applied to the external cathode terminal, the prepreg, and the reinforcement plate to elute thermosetting resin from the prepreg in the side of the capacitor element, thereby sealing the side of the capacitor element with eluted material (27A, 27B). Inasmuch as transfer molding is not used as exterior package, the element never deforms by injection pressure of resin. It is possible to thin by a thickness of exterior package resin. Inasmuch as eluted thermosetting resin does not include a mold release agent, it has good adhesion for the external cathode terminal.

Abstract: A noise filter (1) has a first impedance element (2) having an impedance value Z1, a second impedance element (3) having an impedance value Z2, a third impedance element (4) having an impedance value Z3, a first anode terminal (5), a second anode terminal (6), and a cathode terminal (7). Z1<Z2 and Z1<Z3 are satisfied. Both ends of a central conductor (2a) of the first impedance element (2) are connected to a first node (8) and a second node (9), respectively. Both ends of the second impedance element (3) are connected to the first node (8) and the first anode terminal (5), respectively. Both ends of the third impedance element (4) are connected to the second anode terminal (6) and the second node (9), respectively. The central conductor (2a) and a cathode conductor (2b) of the first impedance element (2) form a transmission line structure having the impedance value Z1. The cathode conductor (2b) is connected to the cathode terminal (7).

Abstract: A transmission line type noise filter includes a metal fine wire (1) made of valve-operational metal and serving as a central conductor, a capacitance forming portion (3) formed over a predetermined length on the periphery of the metal fine wire, and a conductor layer (2) formed on the surface of the capacitance forming portion and serving as an external conductor. The capacitance forming portion (3) includes a sintered body (11) formed on the metal fine wire and made of the foregoing valve-operational metal, a dielectric film (31) formed on the surface of the sintered body and serving as a dielectric, and a solid electrolyte layer (23) formed on the surface of the dielectric film.

Abstract: A solid electrolytic capacitor, and a method of manufacturing the same, includes a capacitor element which comprises a metal plate capable of having a dielectric oxidation layer formed thereon, a dielectric oxidation layer formed on a surface of the metal plate, a polymer layer of a heterocyclic compound formed on the dielectric oxidation layer, a conductive layer formed on the polymer layer, wherein the polymer layer near a defect interface of the dielectric oxidation layer is converted into an insulator, and terminals provided on respective ones of the metal plate and conductive layer.

Abstract: A solid electrolytic capacitor has a capacitor element including a metal plate, such as a plate of aluminum, tantalum, niobium or titanium, capable of having a dielectric oxidation layer formed thereon, a resist layer of a desired shape formed on a predetermined portion of the metal plate, a dielectric oxidation layer formed on a surface of the metal plate at one portion thereof defined by the resist layer, a polymer layer of a heterocyclic compound such as pyrrole, furan or thiophene formed on the dielectric oxidation layer, a conductive layer formed on the polymer layer, a first terminal attached to another portion of the metal plate defined by the resist layer, and a second terminal attached to the conductive layer. In an embodiment, a plurality of the metal plates are stacked to obtain a capacitor element having a multi-layered structure.

Abstract: A solid electrolytic capacitor, and a method of manufacturing the same, includes a capacitor element which comprises a metal plate capable of having a dielectric oxidation layer formed thereon, a dielectric oxidation layer formed on a surface of the metal plate, a polymer layer of a heterocyclic compound formed on the dielectric oxidation layer, a conductive layer formed on the polymer layer, wherein the polymer layer near a defect interface of the dielectric oxidation layer is converted into an insulator, and terminals provided on respective ones of the metal plate and conductive layer.