Abstract: In an embodiment, a coil component includes: a core 10 having a pillar part 24, and a hollow space 22 around the pillar part 24; a coil conductor 40 having a spiral part 42 placed around the pillar part 24, and a lead part 48a or 48b led out from the spiral part 42 toward the bottom face 28 of the core 10, which lead part includes an end part 46a or 46b extending in parallel with the bottom face 28 and serves as an external terminal 49a or 49b; and an insulated terminal 60 electrically insulated from the coil conductor 40, which is provided on at least the bottom face 28; wherein the total base area of the bottom part 72 of the dummy terminal 60, on the bottom face 28, is greater than the total base area of the external terminals 49a, 49b.

Abstract: In an embodiment, a coil component includes: a core 10; a coil conductor 40 having a spiral part 42 placed inside the core 10, and a lead part 48 which is led out from the spiral part 42 to the principal outer surface, constituting the bottom face 28, of the core 10, and which includes an end part 46 that serves as an external terminal 49; an insulated terminal 60 electrically insulated from the coil conductor 40, which is fitted onto and bonded to the core 10, and which has a bottom part 64 positioned on the bottom face 28, a top part 62 positioned on the top face 26, and a side part 66 coupling the bottom part 64 and the top part 62, where the top part 62 and side part 66 have an opening 68 in which an adhesive 82 is filled.

Abstract: To provide an electronic component having printing, which can achieve both of a moisture resistance capability and visibility of printing, and a method of manufacturing the same. A method of manufacturing an electronic component having printing, including preparing an electronic component before being subjected to printing, which is provided with a magnetic element body made of an alloy magnetic material containing a transition metal on a surface thereof, and a glass layer that contains Bi with which the magnetic element body is at least partly coated and does not contain a transition metal, and irradiating the electronic component before being subjected to printing with laser light having a wavelength of 1064 nm so that the laser light is transmitted through the glass layer, so that a printing portion is formed at a partial glass portion in a vicinity of an interface between the magnetic element body and the glass layer.

Abstract: In an embodiment, an air-core coil 50 includes a winding part 54 formed by winding a coated conductive wire 52, wherein a pair of leader parts 56 and 58 is interposed between a second core 20 and a first core 40 which contain metal magnetic grains. A first gap 72 is provided between a principle face 50A of one end portion of the winding part 54 in the direction of a winding core axis of the winding part 54 and the first core member 40. A second gap 70 is provided between a principle face 50B of the other end portion and the second core member 20. The coil component is a small and high-performance coil component with a high dielectric withstanding voltage.

Abstract: A solid electrolytic capacitor employing a conductive polymer has a solid electrolyte layer with a laminated structure where a second conductive polymer layer complexed with an ionic polymer is stacked on a first conductive polymer layer composed of polyaniline or a derivative thereof. By achieving a solid electrolyte layer having an excellent self-healing property, a solid electrolytic capacitor having an excellent withstand voltage characteristic can be provided.

Abstract: A solid electrolytic capacitor employing a conductive polymer has a solid electrolyte layer with a laminated structure where a second conductive polymer layer complexed with an ionic polymer is stacked on a first conductive polymer layer composed of polyaniline or a derivative thereof. By achieving a solid electrolyte layer having an excellent self-healing property, a solid electrolytic capacitor having an excellent withstand voltage characteristic can be provided.

Abstract: A conducting polymer composite is made by compounding a conducting polymer and an ionic polymer so as to achieve good conductivity. A high resistance material generated also has a high withstand voltage. A solid electrolytic capacitor using this conducting polymer composite as its solid electrolytic layer achieves low ESR and high withstand voltage.

Abstract: A conducting polymer composite is made by compounding a conducting polymer and an ionic polymer so as to achieve good conductivity. A high resistance material generated also has a high withstand voltage. A solid electrolytic capacitor using this conducting polymer composite as its solid electrolytic layer achieves low ESR and high withstand voltage.

Abstract: A solid electrolytic capacitor includes an anode element made of a valve action metal, a dielectric oxide film formed on a surface of the anode element, a solid electrolytic layer formed on a surface of the dielectric oxide film, and a cathode layer formed on a surface of the solid electrolytic layer. The solid electrolytic layer has an iron concentration not greater than 100 ppm. Alternatively or in combination therewith, a weight fraction of residues in the solid electrolytic layer is smaller than 5 wt %. The polymerization residue is an oxidizing agent and a monomer that is produced when such solid electrolytic layer is formed.

Abstract: Disclosed is a method of making an electrolytic capacitor including the steps of forming a cathode by depositing a homogeneous and densified conducting polymer on a dielectric layer of a valvular metal porous anode. The conducting polymer is formed of two layers by chemical oxidation polymerization. The first conductive polymer layer is formed in the pretreatment step using a solution excluding an organic acid-type dopant, the polymer is efficiently formed on the inner surface of the pores of the anode and the second conductive polymer layer is formed in the primary treatment step on the first conductive polymer layer, using a solution containing an organic acid-type dopant. The resultant capacitor obtains a high capacitance, a low impedance, and a high responsiveness at high frequencies.

Abstract: A solid electrolytic capacitor includes a capacitor element having an anode of a valve action metal, an oxide film layer formed on the surface of the anode, a solid electrolytic layer formed on the oxide film layer and a cathode electrically connected to the solid electrolytic layer, and also a packaging resin formed to cover the capacitor element. An intermediate layer to relieve stress is arranged in at least one part of the interface between the cathode and the packaging resin. The intermediate layer is deformed and/or peels to relieve stress caused by heat applied while mounting the capacitor element on a substrate.

Abstract: A solid electrolytic capacitor includes an anode element made of a valve action metal, a dielectric oxide film formed on a surface of the anode element, a solid electrolytic layer formed on a surface of the dielectric oxide film, and a cathode layer formed on a surface of the solid electrolytic layer. The solid electrolytic layer has an iron concentration not greater than 100 ppm. Alternatively or in combination therewith, a weight fraction of residues in the solid electrolytic layer is smaller than 5 wt %. The polymerization residue is an oxidizing agent and a monomer that is produced when such solid electrolytic layer is formed.

Abstract: The present invention provides a method of producing an electrolytic capacitor including a porous anode and a solid electrolyte made of a conductive polymer, which can improve coating properties of the conductive polymer on an external surface of the porous anode and productivity. By controlling a polymerization rate, it is possible to sufficiently coat the external surface of the porous anode and fill inner spaces of a lot of pores of the porous anode with the conductive polymer with less numbers of polymerization in comparison with a method of the prior art, thereby obtaining an electrolytic capacitor with small leak current and high reliability.

Abstract: A solid electrolytic capacitor comprising comprises a pair of electrodes, and a dielectric film provided between the paired electrodes wherein at least one of the paired electrodes comprising a first conductive polymer layer which is made of a polymer of a member selected from the group consisting of pyrrole and derivatives thereof, the first conductive polymer layer being doped with a mixed dopant of a polyvalent anion and a monovalent anion consisting of a sulfonate ion dissociated from an anionic surface active agent. The conductive polymer layer may have a double-layered or a multi-layered structure wherein a second and/or third conductive polymer layer is made of a doped polymer of a thiophene derivative. A method for making the capacitors are also described.

Abstract: An electrolytic capacitor in which an conducting polymer as a cathode of the electrolytic capacitor is formed as a homogeneous and densified film on the dielectric layer even extending to the inside of pores of a valvular metal porous body and which obtains a high rate of inducing the capacitance, and have low impedance and high responsiveness at high frequencies. A chemical oxidation polymerization method is utilized to form an conducting polymer layer even extending to the inside of pores of the capacitor element. First, a polymerization reaction is performed in a solution excluding an organic acid-type dopant to form an conducting polymer layer as a densified film on a dielectric layer extending from the surface of the porous body to every inside portions of pores in the pretreatment.

Abstract: The present invention provides a method for producing an electrolytic capacitor including a porous body of a valve metal, an oxide film on a surface of the valve metal, and a conductive polymer layer on a surface of the oxide film. The step of forming the conductive polymer layer on the surface of the oxide film includes the steps of dipping the porous body in a monomer solution; lifting the porous body from the monomer solution and dipping the porous body in an oxidizing solution; and lifting the porous body from the oxidizing solution and allowing the porous body to stand. In the step of dipping the porous body in the oxidizing solution, a period for which the porous body is dipped in the oxidizing solution is equal to or shorter than a period in which 30% of the monomer contained in pores of the porous body diffuses and flows into the oxidizing solution. Alternatively, the volume of the oxidizing solution can be less than three times that of the porous body.

Abstract: A solid electrolytic capacitor is composed of a pair of electrodes and a dielectric film therebetween, wherein one electrode includes a conducting polymer doped with a polyvalent anion and a monovalent anion. The conducting polymer layer may have a multi-layer structure wherein a second or third conductive polymer layer is made of doped thiophene or derivative thereof.

Abstract: A capacitor which includes a dielectric layer, a metal electrode and a capacity adjusting electrode erodable by exposure to light energy, the capacity adjusting electrode being a film made of at least one selected from metallic oxides, metallic nitride and metallic boride.

Abstract: A uniform and dense (non-porous) thin film of metal sulfide with excellent electric characteristics can be prepared by making into a fine mist an organic compound alone or dissolved in a solvent the organic compound containing at least one metal-sulfur bond in the structure thereof, and spraying the organic compound on a heated substrate.

Abstract: A process for producing a thin film of a base metal on a substrate which comprises thermally decomposing in oxidative atmosphere an organic or inorganic compound containing a base metal compound formed on a substrate to form the oxide of the metal and then reducing the oxide by heat-treating it in reductive atmosphere. A temperature sensor, magnetic sensor, and ceramic wiring substrate utilizing the base metal thin film.