WO2005098882A1 - 固体電解コンデンサ製造方法 - Google Patents
固体電解コンデンサ製造方法 Download PDFInfo
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- WO2005098882A1 WO2005098882A1 PCT/JP2005/006597 JP2005006597W WO2005098882A1 WO 2005098882 A1 WO2005098882 A1 WO 2005098882A1 JP 2005006597 W JP2005006597 W JP 2005006597W WO 2005098882 A1 WO2005098882 A1 WO 2005098882A1
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- WIPO (PCT)
- Prior art keywords
- electrolytic capacitor
- anode rod
- solid electrolyte
- electrolyte layer
- solid electrolytic
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
- H01G9/008—Terminals
- H01G9/012—Terminals specially adapted for solid capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
- H01G9/052—Sintered electrodes
Definitions
- the present invention relates to a method for manufacturing a solid electrolytic capacitor including a porous sintered body and an anode rod attached to the sintered body.
- a porous sintered body of a so-called valve-acting metal (a metal capable of exerting a valve action with respect to the passage of current under a predetermined configuration)
- valve-acting metal a metal capable of exerting a valve action with respect to the passage of current under a predetermined configuration
- FIG. 18 shows a conventional intermediate body manufactured in the process of manufacturing such a solid electrolytic capacitor.
- This intermediate body includes a porous sintered body 91, an anode rod 92 attached to the porous sintered body 91, and a ring 93 externally fitted to the anode rod 92.
- the porous sintered body 91 and the anode rod 92 are made of a valve metal.
- the anode rod 92 has a protruding portion 92 a outside the porous sintered body 91.
- the ring 93 is made of a resin having high water repellency.
- this intermediate first, the powder is press-formed and sintered in a state where a part of the anode rod 92 is inserted into a predetermined amount of powder of the valve action metal, thereby forming a porous sintered body. Forming the body 91. Thereafter, the ring 93 is externally fitted to the protrusion 92 a of the anode rod 92 such that the ring 93 contacts the porous sintered body 91.
- a dielectric layer (not shown) is formed at a predetermined position of the intermediate by anodizing treatment. Specifically, first, a part of the protruding portion 92a of the anode rod 92 is exposed to the outside of the processing solution in a predetermined processing solution (for example, an aqueous phosphoric acid solution) for forming a dielectric layer. The whole is immersed. At this time, the intermediate is held at a height such that the liquid level of the processing liquid exceeds the ring 93 by several mm or more.
- a predetermined processing solution for example, an aqueous phosphoric acid solution
- a predetermined potential is applied to the electrodes disposed in the processing solution, and the predetermined potential is applied to the anode rod 92 and the porous sintered body 91 through the portion of the protrusion 92a exposed outside the processing solution.
- the porous sintered body 91 and the anode rod 92 DC current is supplied to the By such an anodizing treatment, the inner surface and the outer surface of the porous sintered body 91 entirely immersed in the treatment liquid, and the surface of the anode rod 92 which is in contact with the treatment liquid, have an oxide film of the valve action metal.
- a dielectric layer (not shown) is formed.
- the dielectric layer is formed at the protruding portion 92a at a position above the ring 93 and in contact with the processing liquid. Is formed.
- a solid electrolyte layer is formed on the dielectric layer formed as described above. Specifically, first, as shown in FIG. 19, the porous sintered body 91 is immersed in a treatment liquid 97 (for example, an aqueous solution of manganese nitrate) for forming a solid electrolyte layer. At this time, the intermediate is held at a height such that the liquid surface 97a of the processing liquid 97 does not exceed the ring 93 to prevent the processing liquid 97 from coming into contact with the projecting portion 92a.
- a treatment liquid 97 for example, an aqueous solution of manganese nitrate
- the intermediate is set within a desired height range (several hundred meters) so that the liquid level 97a of the processing liquid 97 exceeds the shoulder of the porous sintered body 91 but does not exceed the ring 93. Receive position control. After the immersion, the intermediate is subjected to a baking treatment.
- the solid electrolyte layer (not shown) made of, for example, manganese dioxide is formed on the above-described dielectric layer by repeating such immersion treatment and subsequent baking treatment a plurality of times.
- a conductive film 94 such as a graphite layer and a silver layer which acts as a force is formed at a predetermined portion of a porous sintered body 91 having a solid electrolyte layer formed on its surface, and terminals 95a, 95b Are bonded to the anode rod 92 and the conductive film 94, respectively, and a sealing resin 96 is provided.
- Patent Document 1 The method for manufacturing a solid electrolytic capacitor as described above is described in Patent Document 1, for example.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2004-47640
- the intermediate 93 is held at a height position such that the liquid surface 97a of the processing liquid 97 does not exceed the ring 93, so that the ring 93 (high
- the processing liquid 97 is prevented from approaching and coming into contact with a portion above (made of a water-repellent resin).
- a dielectric layer is formed on the surface of the protruding portion 92a from the ring 93 to a predetermined height in the above-described dielectric layer forming step, the liquid level 97a of the processing liquid 97 is changed to the ring 93 in the solid electrolyte layer forming step.
- the treatment liquid 97 may reach the exposed surface of the anode rod 92 where the dielectric layer is not formed due to the effect of surface tension.
- the processing liquid 97 is prevented from approaching and contacting the portion above the ring 93 in the protrusion 92a, a dielectric layer is formed on the surface at the anode rod 92 and the protrusion 92a. The formation of the solid electrolyte layer in the places where it has not been performed is appropriately prevented.
- the terminal 95a cannot be joined to the place where the ring 93 is externally fitted at the anode rod 92 or the protruding portion 92a. Therefore, the solid electrolytic capacitor Y tends to be larger as the ring 93 is thicker, that is, as the ring 93 is longer in the direction in which the anode rod 92 extends. In recent years, the demand for downsizing of the solid electrolytic capacitor Y has been strongly demanded. From the viewpoint of downsizing of the solid electrolytic capacitor Y, it is preferable that the ring 93 be thin.
- the intermediate or porous body is positioned at a height such that the liquid surface 97a does not exceed the ring 93 during the formation of the solid electrolyte layer described above with reference to FIG. It is difficult to hold the body 91. Therefore, in the related art, a predetermined significant thickness is required for the ring 93, and thus the solid electrolytic capacitor Y may not be sufficiently reduced in size.
- the present invention has been conceived in view of the above circumstances, and has been made to reduce the size of a solid electrolytic capacitor while preventing the anode rod from contacting the solid electrolyte layer unduly. It is an object of the present invention to provide a method for manufacturing a solid electrolytic capacitor, which is suitable for achieving the above.
- the method for manufacturing a solid electrolytic capacitor provided by the present invention is characterized in that a dielectric layer is formed on an inner surface and an outer surface of a porous sintered body to which an anode rod having a protrusion protruding from the porous sintered body is attached.
- Forming a dielectric layer to form a solid electrolyte layer on the dielectric layer A solid electrolyte layer forming step for forming, a covering step for covering at least a part of the protruding portion of the anode rod with a covering member, performed before the solid electrolyte layer forming step, and removing at least a part of the covering member And a removing step performed after the solid electrolyte layer forming step.
- an anodic oxidation treatment that is performed in a state where a portion where the dielectric layer is to be formed is immersed in a predetermined treatment liquid can be employed.
- a method of forming the solid electrolyte layer in the solid electrolyte layer forming step a method of immersing a portion where a solid electrolyte layer is to be formed in a predetermined treatment liquid and thereafter performing baking a predetermined number of times can be adopted.
- the covering member is formed so as to cover a predetermined portion of the protruding portion of the anode rod in a circumferential shape.
- the position of the end of the dielectric layer formed in the dielectric layer forming step on the protrusion and the position of the covering member attached to the protrusion in the covering step are appropriately set.
- the end of the dielectric layer on the protruding portion is more porous than the end on the porous sintered body side of the covering member.
- a state at a position far from the body can be realized. That is, it is possible to prevent the anode rod body from being exposed between the porous sintered body and the covering member during the solid electrolyte layer forming step.
- the portion of the protruding portion of the anode rod covered with the covering member before the solid electrolyte layer forming step does not contact the solid electrolyte layer formed in the solid electrolyte layer forming step.
- the covering member is attached to the projecting portion so as not to cover the tip of the projecting portion in the covering step, and the solid electrolyte layer is also formed on the projecting portion tip in the solid electrolyte layer forming step.
- the anode rod and the solid electrolyte layer are in direct contact with each other at the tip of the protruding portion.
- the anode rod is cut at a location covered by the coating member. By doing so, the tip of the protruding portion of the anode rod can be removed.
- the present method as described above is suitable for preventing the anode rod and the solid electrolyte layer from being unduly contacted in the manufactured solid electrolytic capacitor.
- the present method since at least a part of the covering member is removed in the removing step, it is easy to secure an area required for connecting the terminal to the anode rod. Such a method is suitable for reducing the size of the solid electrolytic capacitor. [0014] As described above, the present method is suitable for miniaturizing a solid electrolytic capacitor while preventing the anode rod and the solid electrolyte layer from being unduly contacted.
- the covering step is performed before the dielectric layer forming step. According to such a configuration, it is not necessary to process the porous sintered body and the anode rod or attach a member between the dielectric layer forming step and the solid electrolyte layer forming step. Therefore, according to this configuration, the dielectric layer forming step and the solid electrolyte layer forming step can be performed efficiently.
- the covering step is performed after the dielectric layer forming step.
- the dielectric layer can be reliably formed in the dielectric layer forming step also on the surface of the anode rod (projection) covered by the covering member in the covering step. Therefore, the present configuration is suitable for preventing the anode rod (projecting portion) from contacting the solid electrolyte layer improperly.
- the method further includes, after the solid electrolyte layer forming step, a step of cutting the anode rod at a location apart from the porous sintered body.
- the cutting process can be performed in a state where the anode rod is longer than necessary as a component of the solid electrolytic capacitor, and the processing object (intermediate) is taken until the cutting process.
- the method further includes, after the solid electrolyte layer forming step, a step of cutting the anode rod at a location covered by the covering member.
- a step of cutting the anode rod at a location covered by the covering member As described above, in the case where the covering member is attached to the projecting portion so as not to cover the tip of the projecting portion in the covering step, and the solid electrolyte layer is also formed on the projecting portion tip in the solid electrolyte layer forming step, By cutting the anode rod at a location covered with the covering member, the tip of the protruding portion of the anode rod can be removed. That is, the present configuration may be suitable in some cases to prevent the anode rod and the solid electrolyte layer from being unduly contacted in the manufactured solid electrolytic capacitor.
- the porous sintered body is further provided with an additional anode rod having a protruding portion from which the force of the porous sintered body also projects.
- an additional anode rod is provided in the dielectric layer forming step.
- the entire protruding portion is immersed in a treatment liquid for forming a dielectric layer, and in the coating step, at least a part of the protruding portion of the additional anode rod is covered with an additional coating member.
- the entire protruding portion of the additional anode rod is immersed in a processing solution for forming a solid electrolyte layer, and in the removing step, at least a part of the additional covering member is removed.
- the covering member has a cylindrical shape that extends in a direction in which the anode rod extends in a state where the covering member covers the anode rod.
- the allowable range of the height position at which the intermediate is to be supported with respect to the liquid surface of the processing liquid is larger as the covering member is longer in the extending direction.
- the covering member is a glass tube, and in the covering step, the glass tube is fitted around the anode rod.
- Glass tubes are relatively excellent in acid resistance and corrosion resistance, etc., avoiding problems that occur when the anode rod is unduly exposed due to corrosion of the coating member in the dielectric layer forming process or solid electrolyte layer forming process. In doing so, it is preferable.
- the covering member is a metal wire
- the metal wire in the covering step, is wound around the anode rod.
- the removing step for example, one end of the metal wire is sandwiched and the metal wire is peeled off from the anode bar.
- the covering member is a resin-made linear member, and in the covering step, the resin-made linear member is wound around an anode rod.
- the resin-made linear member in the covering step, for example, one end of the resin-made linear member is sandwiched, and the resin-made linear member is peeled off by an anode rod.
- the covering member is joined to the anode rod with an adhesive.
- Such a configuration is suitable for preventing the treatment liquid for forming a solid electrolyte layer from entering the region between the covering member and the anode rod in the solid electrolyte layer forming step.
- the covering member is a tubular member made of a resin having heat shrinkability, and is used in the covering step.
- the tubular member causes the tubular member to fit over the anode rod.
- this configuration is suitable for preventing the treatment liquid for forming the solid electrolyte layer from unduly infiltrating into the region between the covering member and the anode rod in the solid electrolyte layer forming step.
- FIG. 1 shows a part of a process of a method for manufacturing a solid electrolytic capacitor according to the present invention.
- FIG. 2 shows a part of a process (a part of a coating step) of a method for manufacturing a solid electrolytic capacitor according to the present invention.
- FIG. 3 shows a part of a process (a part of a coating step) of a method for manufacturing a solid electrolytic capacitor according to the present invention.
- FIG. 4 shows a part (process of forming a dielectric layer) of a process of a method for manufacturing a solid electrolytic capacitor according to the present invention.
- FIG. 5 shows a part of a process of a solid electrolytic capacitor manufacturing method according to the present invention (a part of a solid electrolyte layer forming step).
- FIG. 6 shows a part of a process (a part of a solid electrolyte layer forming step) of a method for manufacturing a solid electrolytic capacitor according to the present invention.
- FIG. 7 shows a part (cutting step) of a process of a method for manufacturing a solid electrolytic capacitor according to the present invention.
- FIG. 8 shows a part (removal step) of a process of a method for manufacturing a solid electrolytic capacitor according to the present invention.
- FIG. 9 shows a solid electrolytic capacitor that can be manufactured by the method for manufacturing a solid electrolytic capacitor according to the present invention.
- FIG. 10 shows a modification of the coating step.
- FIG. 11 shows another modification of the coating step.
- FIG. 12 shows another modification of the coating step.
- FIG. 13 shows another modification of the coating step.
- FIG. 14 shows an embodiment of an anode rod joining portion in a porous sintered body when the coating step shown in FIG. 13 is adopted.
- FIG. 15 shows another modification of the coating step.
- FIG. 16 shows an embodiment of an anode rod joining portion in a porous sintered body when the coating step shown in FIG. 15 is adopted.
- FIG. 17 shows another modification of the coating step.
- FIG. 18 is a cross-sectional view of an intermediate produced by a conventional solid electrolytic capacitor manufacturing method.
- FIG. 19 shows an immersion treatment performed in a solid electrolyte layer forming step in a conventional solid electrolytic capacitor manufacturing method.
- FIG. 20 is a sectional view of an example of a solid electrolytic capacitor manufactured by a conventional solid electrolytic capacitor manufacturing method.
- FIG. 1 shows a method for manufacturing a solid electrolytic capacitor according to the present invention.
- This intermediate is composed of the porous sintered body 1 and the anode rods 2A and 2B attached to the porous sintered body 1.
- the porous sintered body 1 and the anode rods 2A and 2B are made of a so-called valve metal.
- niobium is used as the valve metal.
- Anode bars 2A and 2B have protrusions 2a and 2b outside porous sintered body 1, respectively. Also, the anode rod 2A is longer than the anode rod 2B.
- this intermediate after filling a powder of niobium into a mold, a part of the anode rod 2A and a part of the anode rod 2B were inserted into the powder, and the powder was charged. The body is pressed and subsequently sintered.
- a bonding resin 52 is applied to predetermined portions of the protruding portions 2a, 2b of the anode rods 2A, 2B.
- the bonding resin 52 corresponds to the adhesive in the present invention.
- a glass tube 41a having an inner diameter larger than the outer diameter of the anode rod 2A is fitted into the protruding portion 2a and joined to the protruding portion 2a by a joining resin 52, and Then, a glass tube 41b having an inner diameter larger than the outer diameter of the anode rod 2B is fitted into the protruding portion 2b and joined to the protruding portion 2b by the joining resin 52.
- the glass tubes 41a and 41b correspond to the covering member in the present invention.
- the length of the glass tubes 41a and 41b is set to a value suitable for bonding the members for external connection to the anode rods 2A and 2B in the solid electrolytic capacitor manufactured by the present manufacturing method.
- the bonding resin 52 is applied to the protruding portions 2a and 2b in an amount not to fill the space between the glass tubes 41a and 41b and the protruding portions 2a and 2b so as to form a void. deep.
- a dielectric layer (not shown except for the later-described FIG. 8) is formed at a predetermined position of the intermediate body by an anodic oxidation treatment as shown in FIG. In the anodic oxidation treatment shown in FIG.
- a part of the protruding portion 2a of the cathode rod 2A is added to a treatment liquid 61 (phosphoric acid aqueous solution in this embodiment) prepared for forming a dielectric layer previously prepared in a container 62.
- the porous sintered body 1 and the anode rod 2B are immersed while exposing the outside of the processing liquid 61.
- the intermediate is held at a height such that the liquid surface 61a of the processing liquid 61 exceeds the glass tube 41a by a predetermined length.
- a dielectric layer made of niobium pentoxide is formed on the inner surface and the outer surface of the porous sintered body 1 and the surfaces of the anode rods 2A and 2B that come into contact with the treatment liquid 61.
- a solid electrolyte layer is formed at a predetermined portion of the intermediate.
- a treatment liquid 71 (a manganese nitrate aqueous solution in this embodiment) prepared for forming a solid electrolyte layer prepared in advance in a container 72 is provided with a protrusion 2a of the anode rod 2A.
- the porous sintered body 1 and the anode rod 2B are immersed while partially exposing the treatment liquid 71.
- the intermediate is held at a position where the liquid level 71a of the processing liquid 71 does not exceed the glass tube 41a.
- the liquid surface 71a it is desired that the liquid surface 71a be higher than the upper surface of the porous sintered body 1 in the drawing, and if the position is higher than the upper surface of the porous sintered body 1,
- the length is not limited to the length of the glass tube 41a but may extend beyond the glass tube 41a.
- a solid electrolyte layer 30 made of manganese dioxide is formed on the above-mentioned dielectric layer.
- the solid electrolyte layer 30 made of manganese dioxide is formed on the dielectric layers on the inner surface and the outer surface of the porous sintered body 1 and on the dielectric layer in contact with the treatment liquid 71 on the anode rods 2A and 2B.
- the anode rods 2A and 2B are cut.
- Anode rods 2A and 2B By cutting at a desired position separated from the united body 1, the length of the anode rods 2A and 2B can be set to a length suitable for joining to a member for external connection in a solid electrolytic capacitor described later. .
- the force for cutting the anode rods 2a and 2b at positions near the ends of the glass tubes 41a and 41b is not limited to this. Is also good.
- the glass tubes 41a and 41b and the joining resin 52 are removed.
- a removing method for example, a so-called lift-off technique used when forming a wiring pattern on a substrate can be adopted.
- the lift-off technique the solid electrolyte layer formed on the glass tubes 41a and 41b can be removed together with the glass tubes 41a and 41b by dissolving and removing the bonding resin 52 by applying a predetermined solvent.
- FIG. 8 An enlarged view of a main part in FIG. 8 schematically shows a microstructure near the outer surface of the porous sintered body 1 and near the anode rod 2A.
- the porous sintered body 1 is formed by a large number of niobium fine particles 11 being adhered to each other and assembled.
- the dielectric layer 10 is formed on the surface of the numerous fine particles 11, the surface of the anode bar 2A, and the surface of the anode bar 2B outside the enlarged view. Then, the solid electrolyte layer 30 is formed so as to fill the voids in the porous sintered body 1 after the formation of the dielectric layer 10.
- a part of the surface covered with the glass tube 41a on the surface of the anode rod 2A and a part of the surface covered with the glass tube 41b on the surface of the anode rod 2B (not shown) are also inductive.
- the body layer 10 is formed. This is because, in the dielectric layer process described above with reference to FIG. 4, the treatment liquid 61 penetrates to some extent between the anode bar 2A and the glass tube 4la and between the anode bar 2B and the glass tube 41b. Further, the solid electrolyte layer 30 is formed on the anode rod 2A and on the anode rod 2B outside the enlarged view! A portion of the dielectric layer 10 that is in contact with the solid electrolyte layer 30 functions as a dielectric portion of the capacitor.
- the anode rod 2A is electrically connected from the anode rod 2A to the anode rod 2B via the sintered and assembled fine particles 11, and the dielectric layer 10 is mainly provided on the surface of the fine particles 11. Is formed, and a solid electrolyte layer 30 is further formed on the dielectric layer 10.
- the projection 2a of the anode rod 2A is connected to the anode 2a through the conductive portion 21a.
- the terminal 22a is electrically connected, and the anode terminal 22b is electrically connected to the protruding portion 2b of the anode bar 2B via the conductive portion 21b.
- a conductive film 31 having a force such as a graphite layer and a silver layer is formed.
- the conductive film 31 and the cathode terminal 32 are connected via a conductive film 33 formed by using a conductive paste. Then, a sealing resin 51 for sealing the whole while exposing the anode terminals 22a and 22b and the cathode terminal 32 is formed.
- the solid electrolytic capacitor X is a so-called three-terminal solid electrolytic capacitor including anode terminals 22a and 22b and a cathode terminal 32.
- the position of the end on the protrusion 2a of the dielectric layer formed in the dielectric layer forming step described above with reference to FIG. 4, and FIG. 2 and FIG. By appropriately setting the position of the glass tube 41a attached to the protruding portion 2a in the above-described covering step with reference to the covering step, the glass tube 41a is formed after both the dielectric layer forming step and the covering step. It is possible to realize a state in which the end of the dielectric layer on the protrusion 2a is farther from the porous sintered body 1 than the end on the side of the porous sintered body 1 in the above.
- the base material of the anode rod 2A can be prevented from being exposed between the porous sintered body 1 and the glass tube 41a.
- the portion covered by the glass tube 41a before the solid electrolyte layer forming step in the protruding portion 2a of the anode rod 2A corresponds to the solid electrolyte layer 30 formed in the solid electrolyte layer forming step. Do not touch. Therefore, according to the above-described manufacturing method, it is possible to avoid improper contact between anode rod 2A and solid electrolyte layer 30 in manufactured solid electrolytic capacitor X.
- the solid electrolyte layer 30 is formed on the tip portion in the solid electrolyte layer forming step (in this case, the anode rod 2A and the solid electrolyte In direct contact with the layer 30 at the front end, the front end can be removed by cutting the anode rod 2A in the cutting step described above with reference to FIG. Therefore, according to the above-described manufacturing method, even if the solid electrolyte layer 30 is formed in the solid electrolyte layer forming step at the tip where the dielectric layer is not formed in the protruding portion 2a, the manufactured solid electrolyte layer is formed. In the dissolving capacitor X, it is possible to prevent the anode rod 2A and the solid electrolyte layer 30 from coming into improper contact.
- the dielectric layer forming step described above with reference to FIG. also, a dielectric layer is formed on a portion not covered by the bonding resin 52. Therefore, in the solid electrolyte layer forming step, the solid electrolyte layer 30 that is in direct contact with the base of the anode rod 2B is not formed. Then, through the cutting step described above with reference to FIG. 7 and the removal step described above with reference to FIG. 8, it is possible to provide a portion of the anode rod 2B where the substrate surface is exposed. Can appropriately electrically connect the terminal 21b described above.
- the manufacturing method in the manufactured solid electrolytic capacitor X, it is possible to prevent the anode rod 2B electrically connected to the terminal 21b and the solid electrolyte layer 30 from being unduly infested. it can.
- the solid electrolytic capacitor X not including the glass tube 41a and 4 lb can be manufactured. Therefore, the solid electrolytic capacitor X does not require a space for these glass tubes 41a and 41b. Such a solid electrolytic capacitor X is suitable for miniaturization.
- the allowable position range can be increased.
- the anode rods 2A and 2B are cut to a predetermined length, so that the lengths of the anode rods 2A and 2B are reduced to the terminal 21a. , 21b and It can be of any desired length suitable for connection.
- the glass tubes 41a and 41b used in the above-described manufacturing method are relatively excellent in acid resistance and corrosion resistance! Therefore, the anode rods 2A and 2B are not easily corroded by the treatment liquids 61 and 71 in the dielectric layer forming step and the solid electrolyte layer forming step, and the anode rods 2A and 2B are formed in the dielectric layer forming step and the solid electrolyte layer forming step. This is suitable for avoiding a problem that may occur if the exposure is performed improperly.
- the glass tube 41a may be fitted into the protrusion 2a and joined.
- the glass tube 41a is fitted into the protrusion 2a such that the end of the dielectric layer on the protrusion 2a is located within the length of the glass tube 41a and closer to the porous sintered body 1.
- a dielectric layer can be reliably formed at a predetermined position on the porous sintered body 1 side in the protruding portion 2a.
- an alternative method is preferable in order to prevent the anode rod 2A and the solid electrolyte layer 30 from being unduly contacted.
- the glass tube 41a is protruded after the dielectric layer forming step. It is preferable to be fitted into 2a and joined. Even when the alternative method is adopted, the above-described conductive portion 21a can be connected to a region of the anode bar 2A where the dielectric layer is not formed.
- a resin pipe 42 made of a heat-shrinkable resin material is fitted to the projecting portions 2a, 2b.
- the inner diameter of the resin pipe 42 is larger than the diameter of the anode rods 2A and 2B.
- the resin pipe 42 is heated to a predetermined temperature to shrink, so that the resin pipe 42 is brought into close contact with the anode rods 2A, 2B as shown on the right side in the figure.
- Such a coating process is suitable for simplifying the manufacturing process.
- the metal wire 43 is spirally wound around the applied portion.
- a linear member made of resin may be wound.
- the covering member of the present invention can be attached to the anode rods 2A, 2B or the protrusions 2a, 2b.
- the metal wire 43 and the resin-made linear member can be easily removed from the protruding portions 2a and 2b by holding one end thereof and unwinding in the direction opposite to the winding direction.
- the covering resin 44 is provided so as to cover substantially the entirety of the protrusions 2a and 2b.
- a constituent material of the coating resin 44 it is desirable to use a resin having excellent acid resistance and corrosion resistance.
- the coating resin 44 is removed in the removal step, thereby forming the protrusions 2a and 2b. The whole of 2b can be exposed.
- the coating process shown in FIG. 12 it is not necessary to cut anode rods 2A and 2B in the process of manufacturing the solid electrolytic capacitor.
- a joining resin 52 is provided along the anode rods 2a and 2b so as to partially enter the porous sintered body 1, and then the glass tubes 41a and 41b Into the protruding parts 2a, 2b to join.
- the projecting portion 2a is formed by the remaining joining resin 52 in the state shown in FIG. 14 after the dielectric layer forming step, the solid electrolyte layer forming step, the cutting step, and the removing step.
- the joint between the anode rods 2A and 2B and the porous sintered body 1 can be increased in strength. Therefore, when the coating process shown in FIG.
- the covering step shown in FIG. 15 significant gaps are provided between the glass tubes 41 a and 41 b and the joining resin 52 and the porous sintered body 1.
- a coating step in the state shown in FIG. 16 after the dielectric layer forming step, the solid electrolyte layer forming step, the cutting step, and the removing step, the protruding portions 2a, which protrude from the porous sintered body 1,
- the solid electrolyte layer 30 can be provided near the root of 2b. Therefore, when the coating process shown in FIG. 15 is adopted, the strength of the joint between the anode rods 2A and 2B and the porous sintered body 1 is increased in the same manner as when the coating process shown in FIG. 13 is adopted. Is possible.
- the protrusions 2a and 2b are significantly separated from the porous sintered body 1.
- the flat ring 45 having water repellency is attached to the position where the water is repelled.
- a porous layer is formed in a state after the dielectric layer forming step, the solid electrolyte layer forming step, the cutting step, and the removing step. It is possible to provide a solid electrolyte layer 30 near the roots of the protrusions 2a and 2b protruding from the porous sintered body 1. Therefore, when the coating process shown in FIG. 17 is employed, the joining portion between anode rods 2A and 2B and porous sintered body 1 is also obtained in the same manner as when the coating process shown in FIGS. 13 and 15 is employed. Can be strengthened.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/547,326 US20070204446A1 (en) | 2004-04-05 | 2005-04-04 | Method for Manufacturing Solid Electrolytic Capacitor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004-111101 | 2004-04-05 | ||
JP2004111101A JP2005294734A (ja) | 2004-04-05 | 2004-04-05 | 固体電解コンデンサの製造方法 |
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WO2005098882A1 true WO2005098882A1 (ja) | 2005-10-20 |
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PCT/JP2005/006597 WO2005098882A1 (ja) | 2004-04-05 | 2005-04-04 | 固体電解コンデンサ製造方法 |
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US (1) | US20070204446A1 (ja) |
JP (1) | JP2005294734A (ja) |
KR (1) | KR20060135865A (ja) |
CN (1) | CN1938800A (ja) |
TW (1) | TWI261848B (ja) |
WO (1) | WO2005098882A1 (ja) |
Families Citing this family (3)
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JP4703444B2 (ja) * | 2006-03-17 | 2011-06-15 | 三洋電機株式会社 | 固体電解コンデンサの製造方法 |
JP5201671B2 (ja) * | 2008-09-08 | 2013-06-05 | Necトーキン株式会社 | 下面電極型固体電解コンデンサおよびその製造方法 |
JP5469960B2 (ja) * | 2009-08-27 | 2014-04-16 | Necトーキン株式会社 | 下面電極型固体電解コンデンサおよびその製造方法 |
Citations (6)
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JPH0766079A (ja) * | 1993-08-25 | 1995-03-10 | Rohm Co Ltd | 固体電解コンデンサにおけるコンデンサ素子の製造方法 |
JPH07153659A (ja) * | 1993-11-29 | 1995-06-16 | Sanyo Electric Co Ltd | 縮小投影露光装置 |
JPH10116753A (ja) * | 1997-10-30 | 1998-05-06 | Rohm Co Ltd | 固体電解コンデンサ |
JP2969703B2 (ja) * | 1989-12-06 | 1999-11-02 | 松下電器産業株式会社 | 固体電解コンデンサ |
JP2001176753A (ja) * | 1999-12-20 | 2001-06-29 | Fujitsu Media Device Kk | 固体電解コンデンサ |
JP2003347163A (ja) * | 2002-05-30 | 2003-12-05 | Rohm Co Ltd | 固体電解コンデンサ及びその製造方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US5390074A (en) * | 1991-09-30 | 1995-02-14 | Matsushita Electric Industrial Co., Ltd. | Chip-type solid electrolytic capacitor and method of manufacturing the same |
JP3801660B2 (ja) * | 1994-05-30 | 2006-07-26 | ローム株式会社 | タンタル固体電解コンデンサ用コンデンサ素子の製造方法 |
US6238444B1 (en) * | 1998-10-07 | 2001-05-29 | Vishay Sprague, Inc. | Method for making tantalum chip capacitor |
JP4547835B2 (ja) * | 2001-06-21 | 2010-09-22 | パナソニック株式会社 | 固体電解コンデンサおよびその製造方法 |
US20050237698A1 (en) * | 2004-04-23 | 2005-10-27 | Postage Bradley R | Reduced ESR through use of multiple wire anode |
-
2004
- 2004-04-05 JP JP2004111101A patent/JP2005294734A/ja active Pending
-
2005
- 2005-04-04 CN CNA2005800104902A patent/CN1938800A/zh active Pending
- 2005-04-04 US US11/547,326 patent/US20070204446A1/en not_active Abandoned
- 2005-04-04 TW TW094110728A patent/TWI261848B/zh not_active IP Right Cessation
- 2005-04-04 WO PCT/JP2005/006597 patent/WO2005098882A1/ja active Application Filing
- 2005-04-04 KR KR1020067020627A patent/KR20060135865A/ko active Search and Examination
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2969703B2 (ja) * | 1989-12-06 | 1999-11-02 | 松下電器産業株式会社 | 固体電解コンデンサ |
JPH0766079A (ja) * | 1993-08-25 | 1995-03-10 | Rohm Co Ltd | 固体電解コンデンサにおけるコンデンサ素子の製造方法 |
JPH07153659A (ja) * | 1993-11-29 | 1995-06-16 | Sanyo Electric Co Ltd | 縮小投影露光装置 |
JPH10116753A (ja) * | 1997-10-30 | 1998-05-06 | Rohm Co Ltd | 固体電解コンデンサ |
JP2001176753A (ja) * | 1999-12-20 | 2001-06-29 | Fujitsu Media Device Kk | 固体電解コンデンサ |
JP2003347163A (ja) * | 2002-05-30 | 2003-12-05 | Rohm Co Ltd | 固体電解コンデンサ及びその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
CN1938800A (zh) | 2007-03-28 |
JP2005294734A (ja) | 2005-10-20 |
US20070204446A1 (en) | 2007-09-06 |
TW200605115A (en) | 2006-02-01 |
KR20060135865A (ko) | 2006-12-29 |
TWI261848B (en) | 2006-09-11 |
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