WO2012035899A1 - 固体電解コンデンサ素子、その製造方法及びその製造用冶具 - Google Patents
固体電解コンデンサ素子、その製造方法及びその製造用冶具 Download PDFInfo
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- WO2012035899A1 WO2012035899A1 PCT/JP2011/067401 JP2011067401W WO2012035899A1 WO 2012035899 A1 WO2012035899 A1 WO 2012035899A1 JP 2011067401 W JP2011067401 W JP 2011067401W WO 2012035899 A1 WO2012035899 A1 WO 2012035899A1
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- power supply
- capacitor element
- electropolymerization
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/0029—Processes of manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/0029—Processes of manufacture
- H01G9/0036—Formation of the solid electrolyte layer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/022—Electrolytes; Absorbents
- H01G9/025—Solid electrolytes
- H01G9/028—Organic semiconducting electrolytes, e.g. TCNQ
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/15—Solid electrolytic capacitors
Definitions
- the present invention is a method of manufacturing a solid electrolytic capacitor element that achieves a stable capacity appearance rate, a jig for electrolytic polymerization for forming a semiconductor layer of the solid electrolytic capacitor element, and the manufacturing method or jig described above.
- the present invention relates to a solid electrolytic capacitor element.
- the solid electrolytic capacitor includes a conductor (anode body) as one electrode, a dielectric layer formed on the surface of the electrode, and the other electrode (semiconductor layer) provided thereon.
- a conductor anode body
- a dielectric layer is formed on the anode body by chemical conversion, and semiconductor layers are sequentially formed by electrolytic polymerization.
- a plurality of anode bodies are electrically connected in parallel, and these are collectively subjected to anodic oxidation (chemical conversion treatment) or electrolytic polymerization treatment (semiconductor layer formation).
- each anode body is not necessarily homogeneous, and the semiconductor formation speed may vary depending on the anode body.
- one anode body becomes defective (short-circuited), current concentrates on this anode body, and current hardly flows to other anode bodies. Therefore, the present inventors have proposed a method of forming a semiconductor layer by performing electrolytic polymerization on each formed anode body with a constant current using a circuit having a constant current source (internal electrolytic polymerization jig) (Japanese Patent Application Laid-Open No. 2005-260707). 2005-244154 (US2007 / 101565 (A1)): Patent Document 1).
- the inventors shortened the time required for forming the dielectric layer (chemical conversion treatment) in the capacitor manufacturing process, and selected an optimal amount of current according to the stage of chemical conversion treatment or electrolytic polymerization.
- a method of manufacturing an electrolytic capacitor element capable of obtaining a capacitor element group having a narrow capacitance distribution and a low ESR a step of simultaneously forming a dielectric layer on the surface of a plurality of anode bodies by anodization, and on the dielectric layer
- a method of manufacturing an electrolytic capacitor element including a step of forming a semiconductor layer and has applied for a patent for a method of manufacturing an electrolytic capacitor element that performs anodization by limiting the current during anodization of individual anode bodies (International Publication 2010/143462 pamphlet (US2011 / 109495 (A1)): Patent Document 2).
- the heat resistant temperature of an electronic component mounted on an electrolysis jig as disclosed in Patent Document 1 is usually 150 ° C. or lower, a conductor (sintered body or valve action metal foil) after formation of a dielectric layer is formed. ) Cannot be left at a high temperature exceeding 200 ° C.
- JP-A-2-298010 Patent Document 3
- a constant current element constant current diode
- the constant current diode is electrically connected to a metal oxide layer (semiconductor layer) formed on the surface of the anode body.
- An electropolymerization process designed to make contact is disclosed.
- a high impregnation rate 80% or more
- solid electrolytic capacitors are required to have a capacitance change rate within ⁇ 20% in a moisture resistance test. If the solid electrolytic capacitor has an impregnation ratio of less than 80%, there may be a dielectric layer portion where no semiconductor (cathode) is attached in the pores of the anode body, which is 20% or more. Depending on the environment in which the capacitor is placed, moisture adheres to the dielectric layer portion to which the semiconductor layer is not attached, and temporarily becomes a cathode to increase the capacitance. As a result, it exceeds the standard of the moisture resistance test.
- the impregnation rate of the semiconductor layer is as high as possible.
- the object of the present invention is to provide a high impregnation ratio when a semiconductor layer is simultaneously formed by electrolytic polymerization on a plurality of dielectric layers of the anode body, even if the anode body has fine pores or a large anode body. It is an object of the present invention to provide a method for manufacturing a solid electrolytic capacitor element capable of producing a capacitor having good moisture resistance.
- the present inventors have used an electropolymerization jig for forming a semiconductor layer whose current value can be changed at any time, and the amount of current applied during electropolymerization in the pores.
- an electropolymerization jig for forming a semiconductor layer whose current value can be changed at any time, and the amount of current applied during electropolymerization in the pores.
- the formation of a semiconductor layer by electrolytic polymerization is usually repeated several times alternately between an electrolytic polymerization operation on the dielectric layer by external energization and another operation (for example, a chemical conversion treatment operation for repairing the dielectric layer).
- another operation for example, a chemical conversion treatment operation for repairing the dielectric layer.
- the present invention provides the following capacitor element manufacturing method, capacitor element, and electrolytic polymerization jig for forming a capacitor element semiconductor.
- a method of manufacturing a solid electrolytic capacitor element including a step of simultaneously forming a semiconductor layer on a dielectric layer of each anode body with respect to a plurality of anode bodies having a dielectric layer formed on a surface thereof, The step of forming the semiconductor layer includes repeating the operation of conducting the electropolymerization by energizing from the power supply terminal brought into contact with each anode body, and the operation of performing the electropolymerization at least once is one power supply terminal.
- a method for producing a solid electrolytic capacitor element wherein energization is continuously performed while changing the amount of current in a range of 5 to 200 ⁇ A per unit.
- Energization performed while changing the amount of current decreases the amount of current from the upper limit value to the lower limit value and returns it from the lower limit value to the upper limit value, or increases from the lower limit value to the upper limit value, and then changes from the upper limit value to the lower limit value.
- the method for producing a solid electrolytic capacitor element as described in 1 above wherein the solid electrolytic capacitor element is returned.
- a plurality of power supply circuits in which the electropolymerization for forming a semiconductor layer on a plurality of dielectric layers of the anode body can (i) continuously change the energization amount between the lower limit value and the upper limit value on the insulating substrate.
- a method for producing a solid electrolytic capacitor element [8] The method for producing a solid electrolytic capacitor element as described in any one of 1 to 7 above, wherein the number is 300 or more.
- the anode body of one or more capacitor elements manufactured by the method according to any one of 1 to 8 above is electrically connected to the anode terminal and the semiconductor layer to the cathode terminal, respectively, and then the resin sheath A method for manufacturing a solid electrolytic capacitor.
- a solid electrolytic capacitor element group composed of 300 or more solid electrolytic capacitor elements in which the semiconductor layer obtained by any one of the methods 1 to 9 is simultaneously formed, and each of the capacitor elements A solid electrolytic capacitor element group having a capacity within a range of 90 to 110% of an average value of the capacities of the plurality of capacitor elements.
- a solid electrolytic capacitor group comprising a solid electrolytic capacitor including one or a plurality of capacitor elements of the capacitor element group of the above item 10.
- Electropolymerization jig [15] The electropolymerization jig according to any one of items 12 to 14, wherein the power supply circuit is a power supply circuit capable of continuously changing a current amount in a range of 5 to 200 ⁇ A. [16] The jig for electrolytic polymerization as described in any one of 12 to 15 above, wherein the plurality of power supply circuits are 10 to 330 circuits.
- Each power supply circuit has a heat generating component, the heat generating component is arranged on both the front and back surfaces of the insulating substrate, and the same type of heat generation as the heat generating component on the front side is provided on the back side of the position where the heat generating component is on the front side of the insulating substrate.
- the electrolytic polymerization jig according to any one of items 12 to 16, wherein the component is disposed.
- Each power supply circuit has a PNP transistor, and the emitter of the transistor is electrically connected to a terminal for setting a current limit value via a resistor, and the base of the transistor is a voltage limit value.
- the electropolymerization jig according to any one of items 12 to 19, which is a circuit that is electrically connected to a terminal for setting and outputs a collector of the transistor.
- the present invention it is possible to continuously change the current value of the electropolymerization jig to an arbitrary value and energize the conductor layer, and optimal electropolymerization can be performed according to the progress of the polymerization. Even if the anode body has fine pores or an anode body that has a large volume and a distance from the outer surface, a high impregnation rate is obtained, and moisture resistance is good (particularly, the capacity change rate is small). ) A capacitor element group can be obtained.
- FIG. 4 (A) It is a schematic diagram of the support substrate which consists of an elongate electroconductive material which attached the some sintered compact hanging down to the perpendicular direction.
- FIG. 4 (A) It is the front view (A) and back view (B) of the example of the jig for electrolytic polymerization for semiconductor layer formation of the capacitor
- FIG. (A) And
- FIG. (B) is an example of the power supply circuit of the jig for electrolytic polymerization of this invention, respectively.
- capacitor element manufacturing method and capacitor element manufacturing jig electrolytic polymerization jig of the present invention for simultaneously forming a semiconductor layer on a plurality of anode dielectric layers will be described in detail below.
- anode body examples of the anode body used in the present invention include metals, inorganic semiconductors, organic semiconductors, carbon, a mixture of at least one of these, and a laminate in which a conductor is laminated on the surface layer thereof.
- a valve metal or a conductive oxide of the valve metal is preferable because a dielectric layer can be formed by subjecting the anode body itself to chemical conversion treatment, and since a dielectric layer having a larger surface area can be obtained, it has pores.
- An anode body is preferred. Examples of such an anode body include sintered bodies such as tantalum, niobium, niobium monoxide, and titanium.
- the anode body preferably has a lead wire partly embedded in the anode body.
- the anode body in which the present invention is particularly effective is a sintered body having a CV value per unit volume not including voids of 1.6 million ⁇ F ⁇ V / cm 3 or more (in the case of a tantalum sintered body, the CV value per unit mass is about 100,000 ⁇ F). ⁇ Equivalent to V / g or more, CV value per unit mass for niobium sintered body is equivalent to about 1940,000 ⁇ F ⁇ V / g), or CV value per volume without voids is 800,000 ⁇ F.
- V / cm 3 or more (corresponding to a CV value per unit mass of about 50,000 ⁇ F ⁇ V / g or more in a tantalum sintered body, and a CV value per unit mass of about 97,000 ⁇ F ⁇ V / g in a niobium sintered body)
- This is a sintered body having a volume of 20 mm 3 or more.
- the volume of the sintered body is a volume obtained from the outer dimensions of the sintered body, and includes the volume of voids inside the sintered body.
- the upper limit of the CV value depends on the material of the sintered body and the chemical conversion voltage, but the present invention can be sufficiently applied to the upper limit.
- the CV value ( ⁇ F ⁇ V / g) per unit mass of the sintered body corresponds to a sintered body having a porosity of 61% (for example, in the case of tantalum, a sintered body having a density of about 6.5 g / cm 3 ).
- niobium it corresponds to a sintered body having a density of about 3.3 g / cm 3 ) in a 0.5% by mass phosphoric acid aqueous solution at 65 ° C.
- an anode body having a dielectric layer formed on the surface is used.
- a dielectric layer is formed by a long conductive material (metal plate or the like) in which a plurality of anode bodies (10) are suspended at equal intervals and joined by welding at lead wires.
- a plurality of support substrates (11) (hereinafter, also referred to as anode body support substrates (12)) are arranged in a metal frame with their directions aligned in parallel, and the anode body (or its substrate) is placed in a separately prepared chemical conversion tank. A part of the lead wire and the anode body) are immersed in a chemical conversion solution, a voltage is applied between the metal frame to the positive electrode and the cathode plate in the chemical conversion tank for a predetermined time, and it is pulled up, washed and dried.
- the semiconductor layer which is the other electrode of the solid electrolytic capacitor, can generally be composed of an inorganic semiconductor such as manganese dioxide or an organic semiconductor such as a conductive polymer doped with a dopant.
- the semiconductor layer has a particularly low ESR (equivalent series resistance).
- ESR equivalent series resistance
- the polymerization can be performed by a chemical polymerization method, an electrolytic polymerization method in which an electrode (power supply terminal) is brought into contact with the anode body from the outside, or a combination thereof.
- the electropolymerization method forms a stable conductive polymer layer with good reproducibility by controlling the electropolymerization reaction rate by limiting the energization current for each power supply terminal on which the dielectric layer is formed. be able to.
- a semiconductor layer not based on electropolymerization may be formed on the surface of the dielectric layer of the anode body. For example, it is immersed in a raw material monomer-containing solution to be a semiconductor, then immersed in a dopant (aryl sulfonate, etc.)-Containing solution, and further heated to 80 to 150 ° C. to repeat a chemical polymer ( It is preferable to form a (semiconductor layer) because it is not necessary to particularly reduce the initial current amount during the electrolytic polymerization.
- the amount of current during the electropolymerization varies depending on the material used as the semiconductor layer, but is usually in the range of 5 to 200 ⁇ A per power supply terminal.
- As a guideline for setting the current amount for example, when the current amount at the lower limit is energized with a constant current amount, the pores are blocked without forming a semiconductor layer on the surface of the pores in the anode body. It is sufficient to set the amount of current to a level that does not occur, that is, the amount of current that does not decrease the capacity appearance rate.
- the upper limit current amount can be increased to such an extent that the semiconductor layer does not grow abnormally on the outer surface of the anode body, that is, to an amount of current that satisfies the allowable dimensional accuracy of the outer surface.
- the increase or decrease in the amount of current between the upper limit and the lower limit is preferably 30 seconds to 30 minutes, more preferably 40 seconds to 5 minutes, and even more preferably 1 minute to 3 minutes. Good to do. During this time, it is preferable to set the current amount to increase or decrease continuously or stepwise.
- the capacity appearance rate (also referred to as the impregnation rate) is the capacity measured at a frequency of 120 Hz at room temperature in a 30% by mass sulfuric acid aqueous solution of the anode body after formation of the dielectric layer and before formation of the semiconductor layer.
- the percentage of the solid electrolytic capacitor element in which a semiconductor layer is formed and a carbon layer and a silver paste layer are sequentially stacked and dried and cured on the semiconductor layer as a molecule is a capacity measured at room temperature and a frequency of 120 Hz.
- the jig for manufacturing capacitors (electrolytic polymerization jig) according to the present invention has a plurality of power supply circuits (numbers corresponding to power supply terminals) each capable of setting a voltage limit value and a current limit value on an insulating substrate.
- a power supply terminal (hereinafter also referred to as an anode body power supply terminal) that is brought into contact with the anode body is electrically connected to each output of the plurality of power supply circuits. It has a terminal for setting a limit value (hereinafter sometimes referred to as a voltage limit terminal) and a terminal for setting a current limit value (hereinafter also referred to as a current setting terminal).
- the power supply terminal only needs to be able to supply power while being in contact with the anode body suspended from the anode support substrate during electrolytic polymerization.
- a linear terminal or the like is used, and a terminal having a rounded tip is particularly preferable so as not to damage the anode body.
- FIG. 2 is a front view (A) and a back view (B) of an example of an electropolymerization jig.
- this electrolytic polymerization jig (1) 64 sets (32 sets of front and back) each composed of a transistor (2) and a resistor (3) are arranged on both sides of a horizontally long insulating substrate. Moreover, it has a terminal at both ends, one is a current limiting terminal (4), and the other is a voltage limiting terminal (5).
- the current limiting terminal (4) and the voltage limiting terminal (5) on the front and back sides are electrically connected to each other through a through hole (6).
- (7) is a power supply terminal portion that is brought into contact with a plurality of anode bodies that are suspended and connected to the anode support substrate of FIG.
- the linear conductive member (7) is fixed to the end of the substrate (1) electrically connected to the power supply circuit with solder or the like, and extends vertically downward.
- the front end portion (anode feeding terminal portion) is bent in a vertical direction of about 90 ° with respect to the substrate surface.
- the electropolymerization jig is brought close to the anode support substrate, and the connection terminal portion of the linear conductive member (7) is brought into contact with the anode body to conduct electricity.
- the shape of the anode body power supply terminal can be appropriately changed in accordance with the shape of the anode body.
- FIG. 4 shows examples of individual power supply circuits used in the capacitor manufacturing jig shown in FIG. 4A has a PNP transistor (20), where the emitter (E) of the transistor is connected to a current limiting terminal (4) via a resistor (3), and the base (B) of the transistor is voltage limited.
- the circuit is electrically connected to the terminal (5) and outputs the collector (C) of the transistor.
- the power supply circuit in FIG. 4A and the capacitor manufacturing jig in FIG. 2 are connected as shown in FIG.
- the limit value of the maximum voltage applied to the power supply terminal (7) can be set by the voltage applied between the voltage limiting terminal (5) and the cathode plate (9) of the electrolytic polymerization tank (8).
- the voltage applied between the voltage limiting terminal (5) and the cathode plate (9) of the polymerization vessel (8) is almost the maximum voltage applied to the power supply terminal (7).
- one power supply terminal is arranged on one anode body. However, two or more power supply terminals may be arranged on one anode body if physical arrangement is possible. Good. In this way, the polymerization can be completed faster.
- the plurality of power supply terminals in contact with one anode body may be power supply terminals from different capacitor manufacturing jigs.
- a limit value of the maximum current that can be passed through the power supply terminal (7) can be set by a voltage applied between the current limit terminal (4) and the voltage limit terminal (5).
- the maximum current limit value is approximately the following formula depending on the voltage applied between the current limit terminal (4) and the voltage limit terminal (5), the base-emitter voltage (Vbe) of the transistor, and the resistance value of the resistor. Indicated. Vbe (base-emitter voltage of the transistor) is generally around 0.5 to 0.8V.
- the circuit used for the capacitor manufacturing jig of the present invention is not limited to the one shown in FIG. 4A, and for example, the maximum current limit value having the same function is applied between the current limit terminal and the voltage limit terminal.
- a circuit shown in FIG. 4B proportional to the voltage can be used.
- the voltage or current limiting value can be changed even during the formation of the semiconductor layer. Further, if the voltage applied to the voltage limiting terminal or the current limiting terminal is continuously changed, the voltage or current limiting value can be continuously changed.
- the output current of each circuit is preferably at most 110 with respect to the average value. %, Minimum 90%, more preferably maximum 105%, minimum 95%.
- the capacity of each of the capacitor elements in the capacitor element group composed of 300 or more capacitor elements manufactured simultaneously is the average value of the capacities of the 300 or more capacitor elements. It is possible to be within the range of 90% to 110%.
- an electrolytic capacitor group composed of an electrolytic capacitor composed of one or a plurality of capacitor elements of the capacitor element group can provide a capacitor with high accuracy without capacitance variation similar to the above.
- the longer the width of the insulating substrate (the length in the longitudinal direction of the electropolymerization jig (1) in FIG. 2) (therefore, the corresponding anode body support substrate (shown in FIG. 1) 12)
- the longer the length in the longitudinal direction is, the more elements can be processed with one jig.
- the width of the insulating substrate and the width of the anode support substrate are short.
- the gap between the jigs and anode support substrates Even if the intervals are set close to each other, the positions of the respective power supply terminals and the anode body can be kept constant, and the yield is improved.
- the width is preferably 10 to 50 cm, more preferably 20 to 40 cm.
- the distance between adjacent anode body feeding terminals may be adjusted to the interval (pitch) of the anode bodies connected to the anode support. It is preferable that the gap between the anode bodies be wide enough to prevent a liquid bridge from being formed when the anode body is pulled up from the treatment liquid because the step of removing the liquid bridge can be omitted.
- the width of the anode body is about 1 mm to 10 mm
- the interval between the anode bodies is preferably set to 1.25 to 12 mm.
- the distance between adjacent anode body feeding terminals is also the same as this distance.
- the number of power supply circuits per electrolytic polymerization jig of the present invention is preferably 10 to 330.
- the insulating substrate When the number of power supply circuits is large or when a large current is supplied, heat is likely to be generated by the components used in the power supply circuit.
- the insulating substrate When the insulating substrate is heated non-uniformly due to this heat generation, the insulating substrate may be distorted due to a difference in partial thermal expansion. In particular, warpage tends to occur due to a temperature difference between the front and back sides of the substrate.
- heat generating components may be disposed on both the front and back surfaces of the insulating substrate, and heat generating components of the same type as the heat generating components on the front side may be disposed on the back side of the insulating substrate on the front side.
- the heat generating component is a component that may consume most (50% or more) of the power consumed by the power supply circuit. Heating components in the circuit of FIG. 4A are a transistor and a resistor.
- the heat generating parts are arranged on the substrate as much as possible so that only a part of the electropolymerization jig does not reach a high temperature.
- a capacitor element formed by sequentially forming a dielectric layer and a semiconductor layer on the anode body by the above method may be used as it is as a capacitor element.
- electrical connection with an external lead (for example, a lead frame) of the capacitor is provided on the semiconductor layer.
- a conductor layer is formed to form a capacitor element.
- a capacitor layer is obtained by sequentially laminating a carbon layer and a silver layer as the conductor layer on the semiconductor layer.
- An electrolytic capacitor is obtained by electrically connecting one or more anodes of the capacitor element to the anode terminal and the conductor layer to the cathode terminal, and then covering the resin with the resin.
- Examples 1 to 3 and Comparative Examples 1 to 4 The niobium ingot was pulverized after occlusion with hydrogen, dehydrogenated, and granulated after nitriding to obtain a niobium powder containing CV 150,000 ⁇ F ⁇ V / g and nitrogen 8600 ppm. This niobium powder was molded with a 0.29 mm ⁇ niobium lead wire and vacuum-sintered at 1280 ° C. for 30 minutes to obtain a size of 1.5 ⁇ 3.0 ⁇ 4.5 mm (volume: 20.25 mm 3 ), density 640 niobium sintered bodies of 3.3 g / cm 3 were obtained, and these were used as anode bodies.
- the niobium lead wire is embedded in the center of the 1.5 ⁇ 3.0 mm surface so that it is embedded 3.7 mm inside the sintered body and 4.3 mm on the outer surface.
- a separately prepared washer made of tetrafluoroethylene polymer having an outer diameter of 2 mm, an inner diameter of 0.26 mm, and a thickness of 0.2 mm was inserted to a position 0.2 mm away from the sintered body surface of the lead wire.
- the tips of the lead wires of 64 sintered bodies (10) at a 3 mm pitch (15) on a long metal plate (11) made of stainless steel (SUS304) having a length of 214 mm, a width of 20 mm, and a thickness of 2 mm are shown in FIG.
- Electropolymerization jig 10 Electropolymerization jigs (1) shown in FIG. 2 were prepared. It is a copper-clad glass epoxy board with a size of 194.0 x 33.0 mm and a thickness of 1.6 mm, with 8 x 10 mm notches on the left and right in the longitudinal direction, and an electrode on the top of the notch 8 x 23 mm
- Two terminal portions (one is a current limiting terminal (4) and the other is a voltage limiting terminal (5)) are provided. The two terminal portions on the left and right sides are electrically connected to the terminal portions on the back surface of the same area by through holes (6) in the terminal portions.
- Copper wire is fixed with solder. This copper wire extends vertically downward from the end of the substrate and is bent 90 degrees vertically on the substrate surface at a position 5 mm lower, and further extends 5 mm (FIG. 3). The tip of the copper wire is processed into a hemispherical shape. Yes. In addition, gold flash plating is applied to the nickel base on the tip 3 mm of these copper wires.
- Electropolymerization A sintered body formed with the dielectric layer in a state of being connected to a long metal plate is immersed in a 10% by mass ethylenedioxythiophene ethanol solution (hereinafter referred to as monomer impregnation), and then pulled up and air-dried. After removing only the ethanol component, the washer of the sintered body is located at the liquid surface position in the electropolymerization solution composed of 1% by mass ethylenedioxythiophene, 2% by mass anthraquinone sulfonic acid, 30% by mass ethylene glycol, and 67% by mass distilled water. Arranged to be.
- the 10 electropolymerization jigs are arranged in parallel with the 10 long metal plates to which these sintered bodies are connected, and the electropolymerization jig is moved horizontally to the long metal plate side to obtain a copper wire.
- the tip of the gold plating was slightly in contact with the surface of the sintered body.
- a current was supplied to the copper wire (electrolytic polymerization).
- the supplied current and time are shown in Table 1.
- the maximum voltage applied to the copper wire at this time was set to 5V.
- the operations from monomer impregnation to electrolytic polymerization were repeated as shown in Table 1.
- Capacitor elements were fabricated by sequentially laminating. Of the 640 obtained capacitor elements, the capacity was measured for about 630 excluding some abnormal ones (such as short circuit), and the impregnation rate was determined. The results are shown in Table 1.
- the capacitor element is placed on the lead frame, the anode lead of the capacitor element is connected to the anode terminal of the lead frame, and the conductor layer of the capacitor element is connected to the cathode terminal of the lead frame, and transfer sealing and aging are performed.
- 640 niobium solid electrolytic capacitors having a size of 3.5 ⁇ 2.8 ⁇ 1.8 mm, a rating of 2.5 V, and a capacity of 330 ⁇ F were produced.
- Table 5 shows the average capacity of 600 capacitors and the range of the upper and lower limits of the capacity.
- Examples 4-5 and Comparative Examples 5-6 A niobium powder having a CV value of 220,000 ⁇ F ⁇ V / g and a nitrogen content of 15000 ppm was prepared by adjusting the pulverization time and the nitriding time in the same manner as in Example 1 to obtain a sintered body. About this niobium sintered body (1.0 ⁇ 2.4 ⁇ 3.4 mm (volume 8.16 mm 3 ) sintered body having lead wires implanted in a 1.0 ⁇ 2.4 mm surface) A capacitor element was produced in the same manner as in Example 1 except that the conditions were changed to the values shown in Table 2, and the impregnation rate was determined by measuring the capacity of the obtained capacitor element. The results are shown in Table 2. In addition, Table 5 shows the average capacity and the range of the upper and lower limit values of the capacitors produced in the same manner as in Example 1.
- Example 1 a commercially available tantalum powder CV of 70,000 ⁇ F ⁇ V / g was used instead of the niobium powder. This tantalum powder was sintered under vacuum at 1400 ° C. for 30 minutes, and a sintered body having a density of 6.5 g / cm 3 and a size of 2.5 ⁇ 3.8 ⁇ 7.2 mm (volume 68.4 mm 3 ). Got. In the sintered body, a tantalum lead wire having a diameter of 0.40 mm is implanted on the 2.5 ⁇ 3.8 mm surface of the sintered body.
- a capacitor element was produced in the same manner as in Example 1 except that the electric field polymerization conditions were changed to the values shown in Table 3, and the impregnation ratio was determined by measuring the capacity of the obtained capacitor element. The results are shown in Table 3.
- Table 5 shows the average capacity and the range of the upper and lower limit values of the capacitors produced in the same manner as in Example 1.
- Example 6 a commercially available tantalum powder having a CV of 150,000 ⁇ F ⁇ V / g was used instead of the tantalum powder, and the density was 6.5 g / cm 3 and the size was 1.1 ⁇ 3.0 ⁇ 4.0 mm (volume 13). .2 mm 3 ) was produced by vacuum sintering at 1320 ° C. for 30 minutes. Thereafter, a capacitor element was produced in the same manner as in Example 1 except that the electric field polymerization conditions were changed to the values shown in Table 4, and the capacity of the obtained capacitor element was measured to obtain the impregnation rate. The results are shown in Table 4. In addition, Table 5 shows the average capacity and the range of the upper and lower limit values of the capacitors produced in the same manner as in Example 1.
- Test Example Humidity Resistance Test 60 chip capacitors obtained by performing frame attachment, sealing, aging, and electrical property inspection were selected for the capacitor elements of the above examples according to known methods, and a moisture resistance test was performed. The conditions are 60 ° C., 90% RH, 500 hours, no load. In all the examples, the capacity change rate after 500 hours was + 7% or less, but all the comparative examples exceeded + 21%.
- Electropolymerization jig 1
- Transistor 3 Resistor 4
- Current limiting terminal 5
- Voltage limiting terminal 6
- Through hole 6
- Feeding terminal (linear conductive member) 8
- Electrolytic polymerization tank 9
- Cathode plate 10
- Anode body (sintered body) 11
- Support substrate (long metal plate) 12
- Anode body support substrate 15
- Pitch 20
- PNP transistor B Transistor base E Transistor emitter C
- Transistor collector 2
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Abstract
Description
[1] 表面に誘電体層が形成された複数個の陽極体に対して、各陽極体の誘電体層上に同時に半導体層を形成する工程を含む固体電解コンデンサ素子の製造方法であって、半導体層を形成する工程は、個々の陽極体に接触させた給電端子から通電して電解重合をする操作を複数回繰り返すことを含み、少なくとも1回の電解重合をする操作は、1つの給電端子あたり5~200μAの範囲で電流量を変えながら連続して通電を行うことを特徴とする固体電解コンデンサ素子の製造方法。
[2] 電流量を変えながら行う通電が、電流量を、上限値から下限値へ減少させ、下限値から上限値へ戻すか、または下限値から上限値へ増加させ、上限値から下限値へ戻すことにより行われる前項1に記載の固体電解コンデンサ素子の製造方法。
[3] 上限-下限の間の電流量の増減を30秒~30分の時間内で行う前項2に記載の固体電解コンデンサ素子の製造方法。
[4] 電解重合による半導体層の形成前に、陽極体の誘電体層表面に、電解重合によらない半導体層を形成しておく前項1~3のいずれかに記載の固体電解コンデンサ素子の製造方法。
[5] 複数個の陽極体の誘電体層上に半導体層を形成する電解重合が、(i)絶縁基板上に下限値及び上限値の間で連続的に通電量を変えられる複数の電源回路と、(ii)前記複数の電源回路の各出力に電気的に接続された前記陽極体用の給電端子とを有する電解重合用冶具の前記給電端子を、導電性支持基板に接合した複数個の陽極体に接触させて行われる前項1~4のいずれかに記載の固体コンデンサ素子の製造方法。
[6] 陽極体は、空隙を含まない体積当たりのCV値が160万μF・V/cm3以上の焼結体である前項1~5のいずれかに記載の固体電解コンデンサ素子の製造方法。
[7] 陽極体は、空隙を含まない体積当たりのCV値が80万μF・V/cm3以上であり、かつ体積20mm3以上の焼結体である前項1~5のいずれかに記載の固体電解コンデンサ素子の製造方法。
[8] 複数個が300個以上である前項1~7のいずれかに記載の固体電解コンデンサ素子の製造方法。
[9] 前項1~8のいずれかに記載の方法で製造した、1つまたは複数のコンデンサ素子の陽極体を陽極端子に、半導体層を陰極端子に、それぞれ電気的に接続し、次いで樹脂外装する固体電解コンデンサの製造方法。
[11] 前項10のコンデンサ素子群の、1つまたは複数個のコンデンサ素子を含む固体電解コンデンサからなる固体電解コンデンサ群。
[12] 陽極体の表面に形成された誘電体層上に半導体層を形成するための電解重合用冶具であって、(i)絶縁基板上に下限値及び上限値の間で連続的に通電量を変えられる複数の電源回路と、(ii)前記複数の電源回路の各出力に電気的に接続された、陽極体に接触させるための給電端子とを有することを特徴とする電解重合用冶具。
[13] 給電端子が線状である前項12に記載の電解重合用冶具。
[14] 前記電源回路の出力電流の平均値が5~200μAのとき、個々の回路の出力電流が前記平均値に対して最大110%、最小90%の範囲内である前項12または13に記載の電解重合用冶具。
[15] 電源回路が、5~200μAの範囲で電流量を連続的に変えられる電源回路である前項12~14のいずれかに記載の電解重合用冶具。
[16] 複数の電源回路が、10~330個の回路である前項12~15のいずれかに記載の電解重合用冶具。
[17] 個々の電源回路が発熱部品を有し、絶縁基板の表裏両面に前記発熱部品が配置され、絶縁基板表側の発熱部品のある位置の裏側に、前記表側の発熱部品と同一種の発熱部品が配置されている前項12~16のいずれかに記載の電解重合用冶具。
[18] 発熱部品がトランジスタまたは抵抗器である前項17に記載の電解重合用冶具。
[19] 電源回路が、ディスクリート回路で構成される前項17または18に記載の電解重合用冶具。
[20] 個々の電源回路がPNPトランジスタを有し、前記トランジスタのエミッタが抵抗器を介して電流の制限値を設定するための端子に電気的に接続され、前記トランジスタのベースが電圧の制限値を設定するための端子に電気的に接続され、前記トランジスタのコレクタを出力とする回路である前項12~19のいずれかに記載の電解重合用冶具。
本発明に使用される陽極体の例としては、金属、無機半導体、有機半導体、カーボン、これらの少なくとも1種の混合物、それらの表層に導電体を積層した積層体が挙げられる。これらの中でも陽極体自身を化成処理することにより誘電体層が形成できることから弁作用金属または弁作用金属の導電性酸化物が好ましく、さらに表面積の大きい誘電体層が得られることから細孔を有する陽極体が好ましい。このような陽極体としては、例えばタンタル、ニオブ、一酸化ニオブ、チタンなどの焼結体が挙げられる。また、陽極体は、陽極体にその一部が埋設されたリード線を有するものが好ましい。
ここで焼結体の単位質量あたりのCV値(μF・V/g)は、空隙率61%の焼結体(例えば、タンタルの場合、密度約6.5g/cm3の焼結体に相当。ニオブの場合、密度約3.3g/cm3の焼結体に相当。)を0.5質量%燐酸水溶液中、65℃、10V、3時間化成し、水洗乾燥後、30質量%硫酸水溶液中、室温、周波数120Hzで測定した容量(例えば、アジレント社製LCRメーターで測定)と化成電圧10Vとの積を焼結体質量で除した数値として定義される。
本発明では、表面に誘電体層が形成された陽極体を用いる。工業的な取り扱いのし易さから、電解重合による半導体層の形成前に、化成処理により陽極体表面に誘電体層を形成することが好ましい。例えば、誘電体層の形成は、図1に示すように前記複数個の陽極体(10)を等間隔に垂下してリード線部で熔接により接合した長尺の導電性材料(金属板等)からなる支持基板(11)(以下、陽極体支持基板(12)ということがある。)を、複数枚並列に方向を揃えて金属フレームに配置し、別途用意した化成槽に陽極体(またはそのリード線の一部と陽極体)を化成液に漬け、金属フレームを陽極に、化成槽中の陰極板との間に電圧を所定時間印加し、引き上げ、洗浄、乾燥することによって行われる。
固体電解コンデンサの他方の電極である半導体層は、一般に二酸化マンガンなどの無機半導体やドーパントをドープした導電性高分子などの有機半導体により構成できるが、本発明では、特に低いESR(等価直列抵抗)を得るために、誘電体層を有する陽極体上で重合を行い導電性高分子層を形成して半導体層とする。
なお、容量出現率(含浸率ともいう)は、誘電体層形成済みで半導体層形成前の陽極体の30質量%硫酸水溶液中、室温、周波数120Hzで測定した容量を分母とし、その陽極体に半導体層を形成し、半導体層上にカーボン層、銀ペースト層を順次積層乾燥硬化した固体電解コンデンサ素子の室温、周波数120Hzで測定した容量を分子とした百分率である。
本発明のコンデンサ製造用冶具(電解重合用冶具)は、絶縁基板上に電圧の制限値及び電流の制限値をそれぞれ設定可能な電源回路を複数(給電端子に対応する数)有する。前記複数の電源回路の各出力に、陽極体に接触させる給電端子(以下、陽極体給電端子と言うことがある。)が電気的に接続されており、前記複数の電源回路に対し、電圧の制限値を設定するための端子(以下、電圧制限端子と言うことがある。)及び電流の制限値を設定するための端子(以下、電流設定端子と言うことがある。)を有するものである。
給電端子は、電解重合時に前記陽極体支持基板に垂下した陽極体に接触して給電できればよい。例えば、線状の端子などが用いられ、特に陽極体に傷をつけないように先端部に丸みのある端子が好ましい。
電圧制限端子(5)と電解重合槽(8)の陰極板(9)との間に印加する電圧により給電端子(7)に印加される最大電圧の制限値を設定できる。電圧制限端子(5)と重合槽(8)の陰極板(9)との間に印加する電圧がほぼ給電端子(7)に印加される最大電圧になる。
なお、図5では、1つの陽極体に1つの給電端子を配しているが、物理的に配置が可能であれば、1つの陽極体に2つまたはそれ以上の給電端子を配置してもよい。この方が、早く重合を完了させることができる。なお、1つの陽極体に接触する複数の給電端子は、異なるコンデンサ製造用冶具からの給電端子であってもよい。
最大電流の制限値は、ほぼ、電流制限端子(4)と電圧制限端子(5)との間に印加する電圧、トランジスタのベース-エミッタ間電圧(Vbe)及び抵抗器の抵抗値により下記式で示される。
このようにして製造する場合には、同時に製造される300個以上のコンデンサ素子で構成されるコンデンサ素子群中の個々の前記コンデンサ素子の容量を、前記300個以上のコンデンサ素子の容量の平均値の90%~110%の範囲内に収めることが可能となる。
また、前記コンデンサ素子群の1つまたは複数個のコンデンサ素子で構成した電解コンデンサからなる電解コンデンサ群でも前記同様の容量ばらつきのない精度のよいコンデンサが得られる。
また、隣接する陽極体給電端子間の距離は、陽極支持体に接続される陽極体の間隔(ピッチ)に合わせればよい。陽極体の間隔は、隣り合う陽極体間の隙間が、陽極体を処理液から引き上げた時に液橋ができない程度に広くなるようにした方が、液橋を除く工程が省略できるので好ましい。通常、陽極体の幅は1mm程度から10mm程度であるので、陽極体の間隔を1.25~12mmとすることが好ましい。隣接する陽極体給電端子間の距離もこの間隔と同じになる。
上記の冶具幅及び陽極体給電端子間の距離を考慮すると、本発明の電解重合用冶具1枚あたりの電源回路数を10~330個とすることが好ましい。
通常、発熱部品は、電源回路で消費される電力の大半(50%以上)を消費する可能性のある部品である。図4(A)の回路における発熱部品は、トランジスタ及び抵抗器である。
また、発熱部品は、電解重合用冶具の一部分のみが高温とならないようにできるだけ基板上に分散して配置することが好ましい。発熱部品を分散して配置するためには、電源回路としてディスクリート回路を用いることが好ましい。
上記方法により、陽極体上に誘電体層、半導体層を順次形成したものをそのままコンデンサ素子としても良いが、好ましくは半導体層の上にコンデンサの外部引き出しリード(例えば、リードフレーム)との電気的接触をよくするために導電体層を形成しコンデンサ素子とする。例えば、導電体層としてカーボン層及び銀層を前記半導体層上に順次積層しコンデンサ素子を得る。
このコンデンサ素子の1つまたは複数の陽極を陽極端子に、導電体層を陰極端子にそれぞれ電気的に接続し、次いで樹脂外装することにより電解コンデンサが得られる。
ニオブインゴットを水素吸蔵後粉砕、脱水素、窒化後造粒して、CV15万μF・V/g、窒素8600ppm含有するニオブ粉を得た。このニオブ粉を、0.29mmφのニオブ製リード線と共に成形し、1280℃で30分間真空焼結して、大きさ1.5×3.0×4.5mm(体積20.25mm3)、密度3.3g/cm3のニオブ焼結体を640個得、これらを陽極体とした。なお、ニオブのリード線は焼結体内部に3.7mm埋め込まれ、外表面に4.3mm出るように、1.5×3.0mm面の中央に植設されている。
別途用意したテトラフルオロエチレンポリマー製の外径2mm、内径0.26mm、厚さ0.2mmのワッシャーをリード線の焼結体面から0.2mm離れた位置まで挿入した。
次いで、長さ214mm、幅20mm、厚さ2mmのステンレス(SUS304)製の長尺金属板(11)に3mmピッチ(15)で64個の焼結体(10)のリード線の先端を図1のように溶接した。なお、焼結体の長尺金属板面に対して焼結体の1.5×4.5mm面が平行になるように配置した。
このような焼結体が配列した長尺金属板(11)を10枚用意し、合計640個の焼結体について以下の処理を行った。
0.5質量%燐酸水溶液が入った容器に、焼結体のリード線に設けたワッシャー部分がちょうど液面になるように焼結体を浸漬し、65℃で10V、3時間化成処理した後、水洗し、乾燥した。引き続き、長尺金属板に接続した状態の焼結体を250℃の炉に入れ、45分間放置した。室温に戻した後、再度、前記と同じ条件で化成処理を行った。これら操作で焼結体表面に誘電体層を形成した。
続いて、長尺金属板に接続した状態の誘電体層を形成した焼結体を2質量%エチレンジオキシチオフェンのエタノール溶液に浸漬し、次に1質量%キシレンスルホン酸鉄水溶液に浸漬した後、115℃の炉に入れて反応させた。この2質量%エチレンジオキシチオフェンのエタノール溶液への浸漬から反応までの工程をさらに5回(合計6回)繰り返して、焼結体の誘電体層上に化学重合物を析出させた。
図2に示した電解重合用冶具(1)を10本用意した。大きさは194.0×33.0mm、厚さ1.6mmの銅張ガラスエポキシ基板であり、長手方向左右に8×10mmの切り欠け部があり、切り欠け部上側8×23mmに電極となる2つの端子部(片方を電流制限端子(4)、他方を電圧制限端子(5)とした。)が設けられている。左右2箇所の前記端子部は、端子部にあるスルーホール(6)により同面積の裏面の端子部と電気的に接続している。前記基板には、表裏32組ずつ合計64組の20kΩの抵抗器(誤差0.1%以内)(3)とトランジスタ2SA2154GR(2)、及び片面(表面)に64本の太さ0.45mmφの銅線が半田で固定されている。この、銅線は、基板端から垂直下方に伸び、5mm下がった位置で、基板面に鉛直方向に90度曲げられ、さらに5mm伸び(図3)、銅線の先端は半球状に加工されている。また、これら銅線の先端3mmには、ニッケル下地に金のフラッシュメッキが施されていている。
10質量%エチレンジオキシチオフェンエタノール溶液に、長尺金属板に接続した状態の前記誘電体層を形成した焼結体を浸漬(以下、モノマー含浸と呼称する)して、引き上げ風乾してエタノール分のみ除去した後に、1質量%エチレンジオキシチオフェン、2質量%アントラキノンスルホン酸、30質量%エチレングリコール、67質量%蒸留水からなる電解重合液に焼結体のワッシャーが液面位置になるように配置した。さらに、これら焼結体を接続した10枚の長尺金属板に平行に揃えて前記電解重合用冶具10本を配置し、この電解重合用冶具を水平に長尺金属板側に移動させ銅線の金メッキ先端部が焼結体表面にわずかに接触するようにした。この状態で、銅線に電流を供給した(電解重合)。このとき供給した電流及び時間を表1に示した。また、このときの銅線に印加される最大電圧を5Vに設定した。さらにモノマー含浸から電解重合後の操作を表1に示す回数繰り返した。
実施例1と同様の方法で、粉砕時間及び窒化処理時間を調整することによりCV値22万μF・V/g、窒素含有量15000ppmとしたニオブ粉を作成し、焼結体を得た。このニオブ焼結体(1.0×2.4mm面にリード線が植設された1.0×2.4×3.4mm(体積8.16mm3)の焼結体)について、電界重合の条件を表2に示した数値にしたこと以外は実施例1と同様にしてコンデンサ素子を作製し、得られたコンデンサ素子の容量を計測して含浸率を求めた。結果を表2に示す。また、実施例1と同様に作製したコンデンサの平均容量と容量の上下限値の範囲を表5に示す。
実施例1でニオブ粉の代わりに市販のタンタル粉CV7万μF・V/gを使用した。このタンタル粉を、1400℃、30分間、真空焼結焼結し、密度6.5g/cm3、大きさ2.5×3.8×7.2mm(体積68.4mm3)の焼結体を得た。なお、焼結体には直径0.40mmφタンタルリード線が焼結体の2.5×3.8mm面に植設されている。
電界重合の条件を表3で示した数値にした以外は実施例1と同様にしてコンデンサ素子を作製し、得られたコンデンサ素子の容量を計測して含浸率を求めた。結果を表3に示す。また、実施例1と同様に作製したコンデンサの平均容量と容量の上下限値の範囲を表5に示す。
実施例6で、タンタル粉の代わりに市販のCV15万μF・V/gのタンタル粉を使用し、密度6.5g/cm3、大きさ1.1×3.0×4.0mm(体積13.2mm3)の焼結体を1320℃、30分の真空焼結で作製した。その後、電界重合条件を表4で示した数値にしたこと以外は実施例1と同様にしてコンデンサ素子を作製し、得られたコンデンサ素子の容量を計測して含浸率を求めた。結果を表4に示す。また、実施例1と同様に作製したコンデンサの平均容量と容量の上下限値の範囲を表5に示す。
上記各例のコンデンサ素子を公知の方法に従って、フレーム付け、封止、エージング、電気特性検査を行って得たチップ状コンデンサを60個選択し、耐湿試験を行った。条件は、60℃90%RH500時間、無負荷である。実施例はすべて500時間後の容量変化率は、+7%以下であったが、比較例はすべて+21%を超えていた。
2 トランジスタ
3 抵抗器
4 電流制限端子
5 電圧制限端子
6 スルーホール
7 給電端子(線状の導電部材)
8 電解重合槽
9 陰極板
10 陽極体(焼結体)
11 支持基板(長尺金属板)
12 陽極体支持基板
15 ピッチ
20 PNPトランジスタ
B トランジスタのベース
E トランジスタのエミッタ
C トランジスタのコレクタ
Claims (20)
- 表面に誘電体層が形成された複数個の陽極体に対して、各陽極体の誘電体層上に同時に半導体層を形成する工程を含む固体電解コンデンサ素子の製造方法であって、半導体層を形成する工程は、個々の陽極体に接触させた給電端子から通電して電解重合をする操作を複数回繰り返すことを含み、少なくとも1回の電解重合をする操作は、1つの給電端子あたり5~200μAの範囲で電流量を変えながら連続して通電を行うことを特徴とする固体電解コンデンサ素子の製造方法。
- 電流量を変えながら行う通電が、電流量を、上限値から下限値へ減少させ、下限値から上限値へ戻すか、または下限値から上限値へ増加させ、上限値から下限値へ戻すことにより行われる請求項1に記載の固体電解コンデンサ素子の製造方法。
- 上限-下限の間の電流量の増減を30秒~30分の時間内で行う請求項2に記載の固体電解コンデンサ素子の製造方法。
- 電解重合による半導体層の形成前に、陽極体の誘電体層表面に、電解重合によらない半導体層を形成しておく請求項1に記載の固体電解コンデンサ素子の製造方法。
- 複数個の陽極体の誘電体層上に半導体層を形成する電解重合が、(i)絶縁基板上に下限値及び上限値の間で連続的に通電量を変えられる複数の電源回路と、(ii)前記複数の電源回路の各出力に電気的に接続された前記陽極体用の給電端子とを有する電解重合用冶具の前記給電端子を、導電性支持基板に接合した複数個の陽極体に接触させて行われる請求項1に記載の固体コンデンサ素子の製造方法。
- 陽極体は、空隙を含まない体積当たりのCV値が160万μF・V/cm3以上の焼結体である請求項1に記載の固体電解コンデンサ素子の製造方法。
- 陽極体は、空隙を含まない体積当たりのCV値が80万μF・V/cm3以上であり、かつ体積20mm3以上の焼結体である請求項1に記載の固体電解コンデンサ素子の製造方法。
- 複数個が300個以上である請求項1に記載の固体電解コンデンサ素子の製造方法。
- 請求項1~8のいずれかに記載の方法で製造した、1つまたは複数のコンデンサ素子の陽極体を陽極端子に、半導体層を陰極端子に、それぞれ電気的に接続し、次いで樹脂外装する固体電解コンデンサの製造方法。
- 300個以上の、請求項1~9のいずれかの方法で得られる半導体層が同時に形成された固体電解コンデンサ素子で構成された固体電解コンデンサ素子群であって、個々の前記コンデンサ素子の容量が、前記複数のコンデンサ素子の容量の平均値の90~110%の範囲内にある固体電解コンデンサ素子群。
- 請求項10のコンデンサ素子群の、1つまたは複数個のコンデンサ素子を含む固体電解コンデンサからなる固体電解コンデンサ群。
- 陽極体の表面に形成された誘電体層上に半導体層を形成するための電解重合用冶具であって、(i)絶縁基板上に下限値及び上限値の間で連続的に通電量を変えられる複数の電源回路と、(ii)前記複数の電源回路の各出力に電気的に接続された、陽極体に接触させるための給電端子とを有することを特徴とする電解重合用冶具。
- 給電端子が線状である請求項12に記載の電解重合用冶具。
- 前記電源回路の出力電流の平均値が5~200μAのとき、個々の回路の出力電流が前記平均値に対して最大110%、最小90%の範囲内である請求項12に記載の電解重合用冶具。
- 電源回路が、5~200μAの範囲で電流量を連続的に変えられる電源回路である請求項12に記載の電解重合用冶具。
- 複数の電源回路が、10~330個の回路である請求項12に記載の電解重合用冶具。
- 個々の電源回路が発熱部品を有し、絶縁基板の表裏両面に前記発熱部品が配置され、絶縁基板表側の発熱部品のある位置の裏側に、前記表側の発熱部品と同一種の発熱部品が配置されている請求項12に記載の電解重合用冶具。
- 発熱部品がトランジスタまたは抵抗器である請求項17に記載の電解重合用冶具。
- 電源回路が、ディスクリート回路で構成される請求項17に記載の電解重合用冶具。
- 個々の電源回路がPNPトランジスタを有し、前記トランジスタのエミッタが抵抗器を介して電流の制限値を設定するための端子に電気的に接続され、前記トランジスタのベースが電圧の制限値を設定するための端子に電気的に接続され、前記トランジスタのコレクタを出力とする回路である請求項12に記載の電解重合用冶具。
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|---|---|---|---|
| CN201180044643.0A CN103109334B (zh) | 2010-09-17 | 2011-07-29 | 固体电解电容器元件、其制造方法及其制造用工具 |
| EP11824907.7A EP2618351A4 (en) | 2010-09-17 | 2011-07-29 | Solid electrolytic capacitor element, method for producing same, and tool for producing said solid electrolytic capacitor element |
| KR1020127033510A KR101430536B1 (ko) | 2010-09-17 | 2011-07-29 | 고체 전해 콘덴서 소자, 그 제조 방법 및 그 제조용 지그 |
| US13/824,603 US9224538B2 (en) | 2010-09-17 | 2011-07-29 | Solid electrolytic capacitor element, method for producing same, and tool for producing said solid electrolytic capacitor element |
| JP2012533918A JP5925682B2 (ja) | 2010-09-17 | 2011-07-29 | 固体電解コンデンサ素子、その製造方法及びその製造用冶具 |
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| US (1) | US9224538B2 (ja) |
| EP (1) | EP2618351A4 (ja) |
| JP (1) | JP5925682B2 (ja) |
| KR (1) | KR101430536B1 (ja) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2410541B1 (en) * | 2009-03-17 | 2018-05-30 | Showa Denko K.K. | Solid electrolytic capacitor element, method for manufacturing same, and jig for manufacturing same |
| JP6204206B2 (ja) * | 2014-01-22 | 2017-09-27 | 株式会社アツミテック | 自立型調光システム |
| US10431389B2 (en) * | 2016-11-14 | 2019-10-01 | Avx Corporation | Solid electrolytic capacitor for high voltage environments |
| CN113555224B (zh) * | 2020-04-25 | 2025-08-08 | 四川艾华电子有限公司 | 一种用于牛角型铝电解电容器的老化排架 |
| US20240153713A1 (en) * | 2021-03-12 | 2024-05-09 | Panasonic Intellectual Property Management Co., Ltd. | Electrolytic capacitor |
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| JPH02298010A (ja) | 1989-05-12 | 1990-12-10 | Matsushita Electric Ind Co Ltd | 固体電解コンデンサの製造方法 |
| JPH0322516A (ja) * | 1989-06-20 | 1991-01-30 | Sanyo Electric Co Ltd | 固体電解コンデンサの製造方法 |
| JP2005244154A (ja) | 2003-07-10 | 2005-09-08 | Showa Denko Kk | コンデンサ製造用冶具、コンデンサの製造方法及びコンデンサ |
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| JP2001102256A (ja) | 1999-09-28 | 2001-04-13 | Sanyo Electric Co Ltd | 固体電解コンデンサの製造方法 |
| JP2003272954A (ja) * | 2002-03-19 | 2003-09-26 | Nec Tokin Corp | 固体電解コンデンサの製造方法 |
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| US7837185B2 (en) * | 2004-11-04 | 2010-11-23 | Showa Denko K.K. | Jig for producing capacitors, apparatus for producing capacitors and method for producing capacitors |
| US8644003B2 (en) * | 2005-06-09 | 2014-02-04 | National University Corporation, Tokyo University Of Agriculture And Technology | Electrolytic capacitor element and process for producing the same |
| CN100484976C (zh) * | 2005-09-30 | 2009-05-06 | 西安交通大学 | 超级电容器用复合导电高分子电极材料的制备方法 |
| EP2410541B1 (en) * | 2009-03-17 | 2018-05-30 | Showa Denko K.K. | Solid electrolytic capacitor element, method for manufacturing same, and jig for manufacturing same |
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2011
- 2011-07-29 JP JP2012533918A patent/JP5925682B2/ja not_active Expired - Fee Related
- 2011-07-29 US US13/824,603 patent/US9224538B2/en not_active Expired - Fee Related
- 2011-07-29 CN CN201180044643.0A patent/CN103109334B/zh not_active Expired - Fee Related
- 2011-07-29 KR KR1020127033510A patent/KR101430536B1/ko not_active Expired - Fee Related
- 2011-07-29 WO PCT/JP2011/067401 patent/WO2012035899A1/ja not_active Ceased
- 2011-07-29 EP EP11824907.7A patent/EP2618351A4/en not_active Withdrawn
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| Publication number | Publication date |
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| KR101430536B1 (ko) | 2014-08-18 |
| US20130182375A1 (en) | 2013-07-18 |
| EP2618351A4 (en) | 2017-01-18 |
| CN103109334B (zh) | 2015-11-25 |
| JPWO2012035899A1 (ja) | 2014-02-03 |
| EP2618351A1 (en) | 2013-07-24 |
| CN103109334A (zh) | 2013-05-15 |
| US9224538B2 (en) | 2015-12-29 |
| KR20130030775A (ko) | 2013-03-27 |
| JP5925682B2 (ja) | 2016-05-25 |
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