WO2006059546A1 - 固体電解コンデンサおよびその製造方法 - Google Patents
固体電解コンデンサおよびその製造方法 Download PDFInfo
- Publication number
- WO2006059546A1 WO2006059546A1 PCT/JP2005/021685 JP2005021685W WO2006059546A1 WO 2006059546 A1 WO2006059546 A1 WO 2006059546A1 JP 2005021685 W JP2005021685 W JP 2005021685W WO 2006059546 A1 WO2006059546 A1 WO 2006059546A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sintered body
- porous sintered
- electrolytic capacitor
- solid electrolytic
- anode
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 83
- 239000007787 solid Substances 0.000 title claims abstract description 82
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 238000000034 method Methods 0.000 title description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims abstract description 28
- 239000000843 powder Substances 0.000 claims description 30
- 238000005245 sintering Methods 0.000 claims description 24
- 230000009471 action Effects 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 16
- 239000013067 intermediate product Substances 0.000 claims description 13
- 229910001111 Fine metal Inorganic materials 0.000 claims 1
- 239000010955 niobium Substances 0.000 description 26
- 229910052758 niobium Inorganic materials 0.000 description 22
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 22
- 229910000484 niobium oxide Inorganic materials 0.000 description 15
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 13
- 229920005989 resin Polymers 0.000 description 10
- 239000011347 resin Substances 0.000 description 10
- 239000002253 acid Substances 0.000 description 8
- 238000007789 sealing Methods 0.000 description 8
- 239000007784 solid electrolyte Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Inorganic materials O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/02—Mountings
- H01G2/06—Mountings specially adapted for mounting on a printed-circuit support
- H01G2/065—Mountings specially adapted for mounting on a printed-circuit support for surface mounting, e.g. chip capacitors
-
- 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
-
- 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
- H01G9/008—Terminals
- H01G9/012—Terminals specially adapted for solid capacitors
-
- 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
- H01G9/02—Diaphragms; Separators
-
- 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
- H01G9/04—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, 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 relates to a solid electrolytic capacitor provided with a porous sintered body of a valve action metal and a method for manufacturing the same.
- FIG. 21 shows an example of such a solid electrolytic capacitor.
- This solid electrolytic capacitor X includes a porous sintered body 90 of metal having valve action.
- the anode wire 91 is an example of an anode conducting member, and a part thereof is provided so as to protrude from the porous sintered body 90.
- a conductive layer 92 constituting a cathode is formed on the surface of the porous sintered body 90.
- Conductive members 93 and 94 are electrically connected to anode wire 91 and conductive layer 92, respectively.
- the portions of the conductor members 93 and 94 that are exposed from the sealing resin 95 are the anode terminal 93a and the cathode terminal 94a for surface mounting.
- the frequency characteristic of the impedance Z of the solid electrolytic capacitor is determined by Equation 1.
- Equation 1 ⁇ represents angular velocity and corresponds to 2 ⁇ times the frequency.
- C represents the capacitance of the solid electrolytic capacitor, R represents resistance, and L represents inductance.
- lZ o C is the main determinant of impedance ⁇ .
- the impedance can be reduced by increasing the capacitance C.
- the resistance R is the main determinant.
- low ESR equivalent series resistance
- co L is the main determinant in the ultra-high frequency region where the frequency is higher than the self-resonance point.
- low ESL Equivalent Series Inductance
- high frequency noise including harmonic components is generated from devices such as CPUs whose clock frequency is set to high frequency.
- a power supply system that can respond to power demand at high speed is required.
- a low ESL is strongly desired for the solid electrolytic capacitor X used in these applications.
- the shape of the porous sintered body 90 may be flattened.
- the porous sintered body 90 is flattened, the portion of the porous sintered body 90 covering the anode wire 91 becomes thinner.
- the porous sintered body 90 may be damaged, and the anode wire 91 may come off from the porous sintered body 90.
- the porous sintered body 90 is thinned for the purpose of reducing the ESL, there is a problem that the bonding strength of the anode wire 90 is insufficient.
- Patent Document 1 Japanese Patent Laid-Open No. 2003-163137 (FIG. 15)
- the present invention has been conceived under the circumstances described above, and a solid electrolytic capacitor capable of increasing the bonding strength of the anode conductive member while reducing the ESL, and a method for manufacturing the same
- the challenge is to provide
- the present invention takes the following technical means.
- a solid electrolytic capacitor provided by the first aspect of the present invention includes a first porous sintered body made of a metal having a valve action, and an anode connected to the first porous sintered body.
- the second porous sintered body contains NbO.
- the second porous sintered body further contains Nb.
- the second porous sintered body has an average particle size smaller than that of the first porous sintered body.
- the anode conducting member is made of a metal having a valve action.
- the anode conducting member has a plate-like pasting portion, and the second porous sintered body is placed in the pasting portion. And attached to the first porous sintered body.
- the first porous sintered body has a recess, and the application portion is attached to the recess.
- a hole is formed in the sticking part.
- the inner surface of the hole is covered with the second porous sintered body.
- the affixing portion covers the second porous sintered body from the inner surface of the hole to the surface opposite to the first porous sintered body. It has been broken.
- the first porous sintered body is provided with a protrusion that enters the hole of the attaching portion.
- the affixing portion has a saw blade-like edge portion.
- the first porous sintered body has a flat shape whose thickness direction dimension is smaller than a width dimension in a direction perpendicular to the thickness direction
- the anode conduction member has a plate-like extension portion connected perpendicularly to the sticking portion, and the sticking portion is in the thickness direction of the first porous sintered body. Affixed to the surface facing the vertical direction, the extension portion extends in a direction perpendicular to the thickness direction of the first porous sintered body, and the extension portion includes The anode terminal is joined.
- the first porous sintered body has a flat shape whose thickness direction dimension is smaller than a width dimension in a direction perpendicular to the thickness direction,
- the anode conducting member has a plate-like extension part connected in the same direction as the sticking part, and the sticking part faces the thickness direction of the first porous sintered body.
- the extension portion extends in a direction perpendicular to the thickness direction of the first porous sintered body, and the anode terminal is joined to the extension portion.
- the method for producing a solid electrolytic capacitor provided by the second aspect of the present invention provides a metal porous body having a valve action or an intermediate product having a porous sintered body strength.
- the paste contains a fine powder of NbO.
- the paste further includes a fine powder of Nb.
- the average particle size of the fine powder contained in the paste is larger than the average particle size of the porous body or the porous sintered body constituting the intermediate product. small.
- anode conducting member a plurality of anode conducting members each having a plate-like extension portion are used, and the plurality of anode conducting members are used. At least one of the anode conducting members has an extension dimension of the extension portion larger than the extension dimensions of the extension portions of the other anode conduction members.
- FIG. 1 is a cross-sectional view of a first embodiment of a solid electrolytic capacitor according to the present invention.
- FIG. 2 is a perspective view of an essential part of a first embodiment of a solid electrolytic capacitor according to the present invention.
- FIG. 3 is a perspective view showing a step of attaching an anode conducting member in an example of a method for producing a solid electrolytic capacitor according to the present invention.
- FIG. 4 is a perspective view showing a state after sintering in an example of the method for producing a solid electrolytic capacitor according to the present invention.
- FIG. 5 is a fragmentary cross-sectional view showing a step of forming a second porous sintered body in an example of the method for producing a solid electrolytic capacitor according to the present invention.
- FIG. 6 is a perspective view showing a process of attaching an anode terminal and a cathode conducting member in an example of the method for producing a solid electrolytic capacitor according to the present invention.
- FIG. 7 is a perspective view of an essential part of a second embodiment of the solid electrolytic capacitor according to the present invention.
- FIG. 8 is a perspective view of an essential part of a second embodiment of the solid electrolytic capacitor according to the present invention.
- FIG. 9 is a perspective view of main parts of a third embodiment of a solid electrolytic capacitor according to the present invention.
- FIG. 10 is a perspective view of an essential part of a solid electrolytic capacitor according to a third embodiment of the present invention.
- FIG. 11 is a perspective view of an essential part of a solid electrolytic capacitor according to a third embodiment of the present invention.
- FIG. 12 is a perspective view of main parts of a third embodiment of the solid electrolytic capacitor according to the present invention.
- FIG. 13 is a cross-sectional view of a principal part of a fourth embodiment of a solid electrolytic capacitor according to the present invention.
- FIG. 14 is a cross-sectional view of main parts of a fourth embodiment of a solid electrolytic capacitor according to the present invention.
- FIG. 15 is a perspective view of relevant parts of a fourth embodiment of a solid electrolytic capacitor according to the present invention.
- FIG. 16 is a cross-sectional view of a fourth embodiment of a solid electrolytic capacitor according to the present invention.
- FIG. 17 is a perspective view of an essential part of a solid electrolytic capacitor according to a fifth embodiment of the present invention.
- FIG. 18 is a perspective view of main parts of a sixth embodiment of the solid electrolytic capacitor according to the present invention.
- FIG. 19 is a perspective view of main parts of a sixth embodiment of a solid electrolytic capacitor according to the present invention.
- FIG. 20 is a perspective view of relevant parts of a sixth embodiment of the solid electrolytic capacitor according to the present invention.
- FIG. 21 is a cross-sectional view of an example of a conventional solid electrolytic capacitor.
- the solid electrolytic capacitor A of the present embodiment includes a first porous sintered body 1A, a second porous sintered body 1B, and first and second anode conducting members 21A, 21B. And anode terminals 3A and 3B, a cathode conducting member 41, and a sealing resin 7.
- the sealing resin 7 is omitted.
- the first porous sintered body 1 A has a flat rectangular plate shape whose thickness direction dimension is smaller than the width dimension in the direction orthogonal to the thickness direction dimension. is there.
- the first porous sintered body 1A is formed by press-molding powder of niobium (Nb), which is a metal having a valve action, and sintering it.
- the first porous sintered body 1A is obtained by sintering niobium powders, and has a structure in which minute gaps are formed between them.
- a dielectric layer (not shown) made of niobium pentoxide (Nb 2 O 3) is provided on the surface of the powder.
- a solid electrolyte layer (not shown) is formed on the surface of the dielectric layer.
- the solid electrolyte layer is made of, for example, manganese dioxide or a conductive polymer, and is preferably formed so as to fill the entire gap.
- tantalum Ti may be used instead of niobium as long as it has a valve action.
- Each second porous sintered body 1B is formed by sintering powdered acid niobium (NbO), which is a metal having a valve action.
- Each second porous sintered body 1B has a structure in which minute gaps are formed in the same manner as the first porous sintered body 1A, and the dielectric layer and the solid electrolyte layer are Is formed.
- the niobium oxide fine powder forming the second porous sintered body 1B has an average particle diameter of the average particle of the niobium fine powder forming the first porous sintered body 1A. It is supposed to be smaller than the diameter.
- Each of the first and second anode conducting members 21A, 21B in two pieces has a substantially L-shaped plate shape and is made of niobium, which is a metal having a valve action.
- Each anode conducting member 21A, 21B has a sticking portion 21a and an extending portion 21b that are vertically connected to each other.
- Each anode conducting member 21A, 21B has its affixed portion 21a adhered to the recess lAa of the first porous sintered body 1A via the second porous sintered body 1B.
- Each sticking portion 21a has a hole 21c. As shown in FIG. 1, the second porous sintered body 1B fills the space between each sticking portion 21a and each recess lAa and covers the inner surface of each hole 21c.
- each extending portion 21b is perpendicular to the thickness direction of the first porous sintered body 1A. It extends in the direction (left-right direction in the figure).
- the first anode terminal 3A is joined to the lower surface of the extending portion 21b of the first anode conducting member 21A in the figure.
- a second anode terminal 3B is joined to the lower surface of the extending portion 21b of the second anode conducting member 21B in the drawing.
- These joints are made by, for example, conductive grease 6.
- the first and second anode terminals 3A and 3B have a long rectangular shape, and are made of, for example, copper.
- a cathode conducting member 41 is provided on the lower surface of the first porous sintered body 1A in the figure.
- the cathode conducting member 41 is joined to the first porous sintered body 1A via the conductive layer 5, for example.
- the conductive layer 5 is formed by laminating a graphite layer and a silver paste layer on the solid electrolyte layer (not shown) formed on the surface of the first porous sintered body 1A. ing.
- the cathode conducting member 41 is formed with four extending portions, and these extending portions become two first and second cathode terminals 4A and 4B. .
- the sealing resin 7 is for protecting the porous sintered body 1, the anode conductive members 21 A, 21 B, and the like by covering them.
- the sealing resin 7 is formed using, for example, a thermosetting resin such as epoxy resin.
- the first and second anode terminals 3A, 3B and the first and second cathode terminals 4A, 4B have their lower surfaces exposed from the sealing resin 7, and are used for surface mounting of the solid electrolytic capacitor A. It is done.
- the solid electrolytic capacitor A includes the first anode terminal 3A for input and the second anode terminal 3B for output, the first cathode terminal 4A for input and the second anode terminal 4B for output. Is provided as a so-called four-terminal type solid electrolytic capacitor.
- a niobium porous sintered body 11 is prepared. Specifically, a niobium porous body is formed by filling a metal mold with fine powder of -ob (Nb) and press-molding it. The porous sintered body 11 is obtained by sintering the porous body. In the above sintering, the sintering temperature and the sintering time are adjusted so that the degree of sintering of the porous sintered body 11 is smaller than that of the first porous sintered body 1A shown in FIG. This porous sintered body 11 corresponds to an example of an intermediate product of the first porous sintered body referred to in the present invention.
- pace No. 12 is a mixture of niobium oxide (NbO) fine powder and an organic solvent such as acrylic.
- the niobium oxide fine powder is used when forming the porous body, and the niobium oxide fine powder is smaller than the average particle diameter of the niobium fine powder.
- the substantially L-shaped anode conductive members 21A, 21A 'and 21B are stuck to the recess 11a.
- the anode conducting members 21A, 21A ′ and 21B are stuck by pressing the respective sticking portions 21a against the paste 12 in the recess 11a.
- Three holes 21c are formed in each sticking portion 21a. Therefore, at the time of pasting, the paste 12 is filled in each hole 21c.
- the anode conductive members 21A, 21A ′, 21B are formed with extending portions 21b, 21b ′. Among these, the extending portion 21b ′ of the anode conducting member 21A ′ is longer than the other extending portions 21b.
- the porous sintered body 11 to which the anode conductive members 21A, 21A 'and 21B are attached is sintered again. Since the porous sintered body 11 has already been sintered as described above, the sintering is performed twice in total. As a result, the porous sintered body 11 becomes the first porous sintered body 1A as shown in FIG.
- the organic solvent is further evaporated by sintering or decomposed by high temperature.
- the fine powder of niobium acid contained in the paste 12 aggregates with each other. This fine powder of acid niobium has a relatively small average particle size, so that it is sufficiently sintered by only one sintering. As a result, the paste 12 becomes the second porous sintered body 1B as shown in FIG.
- Niobium oxide is brittle compared to niobium, for example, and is a material. Therefore, niobium oxide is easy to miniaturize and is suitable for making a fine powder with a small average particle diameter. In addition, the average particle size of fine powder of acid niobium is small! /,
- the second porous sintered body 1B can be obtained at a lower sintering temperature. If the sintering temperature is low, the volume reduction when forming the first and second porous sintered bodies 1A and 1B can be reduced.
- the second porous sintered body 1B is peeled off on the affixing surface of the affixing portion 21a of the anode conductive members 21A, 21A ′, 21B.
- the fine powder of niobium is added to paste 12. May be mixed.
- the sintering temperature can be further lowered even if the average particle size is about the same.
- the hole 21 c is filled with the paste 12. Since the second porous sintered body 1B is formed through the steps of evaporation and sintering, the volume thereof is smaller than that of the paste 12. Therefore, the second porous sintered body 1B is formed so as to cover the inner surface of the hole 21a.
- a porous body before sintering may be used instead of the porous sintered body 11.
- the sintering process is performed only once after the anode conducting members 21A and 21B are attached.
- first and second porous sintered bodies 1A and 1B are formed, a dielectric layer (not shown) and a solid electrolyte layer (not shown) are formed on the first and second porous sintered bodies 1A and 1B. (Not shown).
- the first and second porous sintered bodies 1A, 1B are, for example, phosphorous while holding the extension 2 lb ′ of the anode conducting member 21A ′ shown in FIG. Immerse in an acid aqueous solution.
- the first and second porous sintered bodies 1A and 1B are anodized to form the dielectric layer made of niobium pentoxide (Nb 2 O 3). Also, above
- the formation of the solid electrolyte layer is performed by immersing the first and second porous sintered bodies 1A and 1B in, for example, an aqueous solution of manganous nitrate and then repeatedly lifting and firing them.
- the extending portion 21b ′ is longer than, for example, the other extending portions 21b, which is convenient for performing the above-described operation of sandwiching the extending portion 21b ′.
- a conductive layer 5 made of, for example, a graphite layer and a silver paste layer is formed.
- a cathode conducting member 41 is joined to the lower surface in the drawing of the first porous sintered body 1A via the conductive layer 5.
- the extending portion 21b ′ of the anode conducting member 21A ′ is cut so as to have the same dimensions as the other extending portions 21b.
- the anode conducting member 21A ′ becomes the anode conducting member 21A having the extending portion 21b.
- the first and second anode terminals 3A and 3B are connected to the lower surfaces of the extending portions 21b of the first and second anode conducting members 21A and 21B, respectively, by using, for example, conductive grease. Join.
- the sealing resin 7 shown in FIG. 1 is formed by molding using an epoxy resin. As a result, a resin package type solid electrolytic capacitor A is obtained.
- the present embodiment it is possible to reduce the ESL and increase the bonding strength of the anode conducting members 21A and 21B. That is, as the first porous sintered body 1A has a flatter shape, the inductance in the first porous sintered body 1A can be reduced, which is advantageous in achieving low ESL. It becomes.
- the first porous sintered body 1A of the present embodiment has a flat rectangular plate shape and has a configuration suitable for low ESL.
- the extending portions 21b of the anode conducting members 21A and 21B are at the same height as the lower surface of the first porous sintered body 1A in the drawing and in the horizontal direction in the drawing. It extends to. For this reason, the current path between the first and second anode terminals 3A, 3B and the first porous sintered body 1A has a generally flat shape and does not have a large standing part. Therefore, the inductance in the current path can be reduced, and the solid electrolytic capacitor A can be reduced in ESL.
- the second porous sintered body 1B is formed by using a fine powder of niobium oxide, so that the first porous sintered body 1A and the anode conducting members 21A, 21B are appropriately joined. Can be made. As shown in Fig. 3, the porous sintered body 11 and paste 12 subjected to force-sintering The fine powder of acid niobium contained in each other is well adapted to each other. In addition, since anode conducting members 21A and 21B are made of niobium, they are well compatible with the fine powder of niobium oxide contained in paste 12 shown in FIG.
- the sintering step for forming the second porous sintered body 1B has a low sintering temperature and a short sintering time due to its small average particle size. Therefore, the volume reduction from the paste 12 shown in FIG. 5 to the second porous sintered body 1B can be reduced. Therefore, in the process of forming the second porous sintered body 1B, it is possible to prevent the anode conductive members 21A and 21B from being separated by the volume reduction.
- the inner surface of the hole 21c provided in the affixing portion 21a of the anode conducting members 21A and 21B is covered with the second porous sintered body 1B.
- the anode conducting members 21A and 21B have the pasting portion 21a accommodated in the recess lAa. For this reason, the anode conducting members 21A and 21B can be prevented from shifting due to a synergistic effect with the anchor effect.
- the solid electrolytic capacitor A includes the first porous sintered body 1A having a volume significantly larger than that of the second porous sintered body. Therefore, if the first porous sintered body 1A has a sufficient gap, a large capacity of the solid electrolytic capacitor A can be appropriately achieved.
- the shapes of the through members 22A and 22B are different from the anode conducting members 21A and 21B of the first embodiment described above.
- the anode terminal, the cathode terminal, and the sealing resin are omitted.
- the anode conducting members 22A and 22B each have a shape having two right-angle portions.
- the upper part and the center part in the figure are the pasting parts 22a and 22a ', respectively.
- Each affixing portion 22a, 22a ' is affixed via a second porous sintered body 1B to the portion of the first porous sintered body 1A extending from the upper surface in the drawing to the side surface in the drawing.
- the sticking direction is set to two directions by sticking using sticking parts 22a and 22a 'vertically connected to each other. Therefore, it is advantageous for increasing the bonding strength of the anode conducting members 22A and 22B.
- FIG. 8 shows a modification of the second embodiment of the solid electrolytic capacitor according to the present invention.
- each of the anode conducting members 22A and 22B has a wide shape. According to such an embodiment, the affixing area of the anode conducting members 22A and 22B can be further increased.
- FIG. 9 shows a third embodiment of the solid electrolytic capacitor according to the present invention.
- anode conductive members 23A and 23B are niobium strips.
- the portions closer to the center of these anode conductive members 23A and 23B are pasting portions 23a, which are pasted on the upper surface of the first porous sintered body 1A in the drawing.
- portions extending on both sides of the pasting portion 23a serve as extending portions 23b, and anode terminals (not shown) are joined to these extending portions.
- the strip-like anode conducting members 23A and 23B can be easily formed by cutting, for example, a niobium flat plate material.
- FIG. 10 shows a modification of the third embodiment of the solid electrolytic capacitor according to the present invention.
- four holes 23c are formed in each of the anode conducting members 23A and 23B.
- a so-called anchor effect is appropriately exhibited, and the bonding strength of the anode conducting members 23A and 23B can be further increased.
- FIG. 11 shows another modification of the third embodiment of the solid electrolytic capacitor according to the present invention.
- the edge portion 23d that is spaced apart in the width direction has a saw-tooth shape. These edge portions 23d are covered with the second porous sintered body 1B. According to such an embodiment as well, the anchor effect is exhibited and the bonding strength of the anode conducting members 23A and 23B can be improved.
- FIG. 12 shows another modification of the third embodiment of the solid electrolytic capacitor according to the present invention.
- the affixing portion 23a of the strip-like anode conducting member 23 is accommodated in the groove lAb formed in the first porous sintered body 1A.
- the space other than the sticking portion 23a in the groove lAb is filled with the second porous sintered body 1B.
- FIG. 13 shows a fourth embodiment of the solid electrolytic capacitor according to the present invention.
- a hole 24 c is provided in the affixing portion 24 a of the flat plate-like anode conducting member 24.
- the second porous sintered body 1B is formed so that the inner surface force of the hole 24c of the anode conducting member 24 covers the region extending from the upper surface of the pasting portion 24a in the drawing. Also according to such an embodiment, the bonding strength of the anode conducting member 24 can be increased.
- a protrusion lAc that enters the hole 24c is formed in the first porous sintered body 1A.
- the protrusion lAc has a shape in which the top of the cone is cut. According to such an embodiment, the anchor effect can be further enhanced.
- a centering effect is expected due to the protrusion 11c being inserted into the hole 24c. Therefore, the anode conducting member 24 can be attached to the intermediate product 11 at a more accurate position.
- FIG. 16 is an example of a solid electrolytic capacitor having a joint structure similar to that of the embodiment shown in FIG. 14 and FIG.
- a recess lAa is formed on the lower surface of the first porous sintered body 1A in the figure, and a protrusion lAc is provided on the bottom surface of the recess lAa.
- the protrusion lAc enters the hole 24c formed in the anode conduction member 24.
- the protrusion lAc and the pasting part 24a are covered with the second porous sintered body 1B.
- This region is filled with the conductive layer 5. Accordingly, the lower surface of the first porous sintered body 1A is a smooth surface.
- a large-sized cathode conducting member 41 can be easily attached to such a smooth surface.
- the anode conduction member 24 has a stepped portion 24e.
- the extension part 24b is located on the lower side in the figure.
- the anode terminal 3 joined to the extension 24b is flush with the cathode terminal (not shown) provided on the cathode conducting member 41.
- Such a configuration is suitable for achieving low ESL.
- FIG. 17 shows a fifth embodiment of the solid electrolytic capacitor according to the present invention.
- the anode conductive members 25A and 25B are formed with an upstanding sticking surface 25a and a sticking face 25a ′ connected perpendicularly to the sticking face 25a.
- These affixing surfaces 25a and 25a ′ are affixed to the side surface of the first porous sintered body 1A and the lower surface in the drawing.
- An extending portion 25b extends from the affixing surface 25a '.
- a stepped portion 25e is formed in the extending portion 25b.
- the portion near the tip of the extended portion 25b has the same height as the cathode terminals 4A and 4B.
- This portion also serves as the anode terminals 3A and 3B.
- the anode terminals 3A and 3B and the cathode terminals 4A and 4B can be arranged so as to face in the same direction.
- Such a configuration is suitable for arranging the wiring pattern on which the solid electrolytic capacitor A is mounted in a compact manner.
- FIGS. 18 to 20 show a sixth embodiment of the solid electrolytic capacitor according to the present invention.
- an anode wire is used as the anode conducting member.
- anode wires 26A, 26B as anode conducting members are attached to both side surfaces of the first porous sintered body 1A. Both ends of the anode wires 26A and 26B are extended portions 26b in the present invention, and anode terminals (not shown) are joined to these portions. A region between the anode wires 26A and 26B and the side surface of the first porous sintered body 1A is filled with the second porous sintered body 1B. Since this area is surrounded by an arc-shaped surface and a flat surface, there is a relatively large gap.
- the second porous sintered body 1B is formed from a paste containing fine powder of niobium oxide.
- the gap is filled with the second porous sintered body 1B, which is illegal. There are no voids. Therefore, it is preferable for the low ESR of the solid electrolytic capacitor A that the resistance between the first porous sintered body 1A and the anode wires 26A, 26B is not unduly increased.
- the anode wire 26 partially enters the recess lAa formed in the first porous sintered body 1A, and the second porous It is covered with a sintered body.
- the anode wires 26A and 26B may be provided so as to penetrate the groove lAb formed in the first porous sintered body 1A.
- the solid electrolytic capacitor according to the present invention is not limited to the embodiment described above.
- the specific configuration of each part of the solid electrolytic capacitor according to the present invention can be varied in design in various ways.
- the materials of the porous sintered body and the anode conducting member include niobium and acid niobium! / May be any metal having a valve action such as tantalum. Further, the specific use of the solid electrolytic capacitor according to the present invention is not limited.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/791,568 US7706131B2 (en) | 2004-11-30 | 2005-11-25 | Solid electrolytic capacitor and method for manufacturing same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004346019A JP4177322B2 (ja) | 2004-11-30 | 2004-11-30 | 固体電解コンデンサおよびその製造方法 |
JP2004-346019 | 2004-11-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006059546A1 true WO2006059546A1 (ja) | 2006-06-08 |
Family
ID=36564980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/021685 WO2006059546A1 (ja) | 2004-11-30 | 2005-11-25 | 固体電解コンデンサおよびその製造方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7706131B2 (ja) |
JP (1) | JP4177322B2 (ja) |
KR (1) | KR100904794B1 (ja) |
CN (2) | CN103440991B (ja) |
TW (1) | TWI284909B (ja) |
WO (1) | WO2006059546A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009200369A (ja) * | 2008-02-25 | 2009-09-03 | Sanyo Electric Co Ltd | 固体電解コンデンサ |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5289669B2 (ja) * | 2005-06-10 | 2013-09-11 | ローム株式会社 | Nb化合物の微粉末の製造方法、Nb化合物の微粉末を用いた固体電解コンデンサの製造方法 |
JP2008159826A (ja) * | 2006-12-25 | 2008-07-10 | San Denshi Kogyo Kk | 固体電解コンデンサ |
JP5206958B2 (ja) * | 2008-09-30 | 2013-06-12 | 日本ケミコン株式会社 | 固体電解コンデンサとその製造方法 |
JP2010135750A (ja) * | 2008-10-31 | 2010-06-17 | Sanyo Electric Co Ltd | 固体電解コンデンサ及びその製造方法 |
DE102008063853B4 (de) * | 2008-12-19 | 2012-08-30 | H.C. Starck Gmbh | Kondensatoranode |
US8199461B2 (en) * | 2009-05-29 | 2012-06-12 | Avx Corporation | Refractory metal paste for solid electrolytic capacitors |
US8441777B2 (en) * | 2009-05-29 | 2013-05-14 | Avx Corporation | Solid electrolytic capacitor with facedown terminations |
CN102347137B (zh) * | 2010-07-29 | 2014-04-02 | 禾伸堂企业股份有限公司 | 电容器结构及其制造方法 |
EP3104382B1 (en) * | 2014-02-07 | 2019-07-31 | Murata Manufacturing Co., Ltd. | Capacitor with porous metal electrode and method for its manufacturing |
EP3349850B1 (en) * | 2015-09-16 | 2019-10-23 | Cardiac Pacemakers, Inc. | Assembly techiniques for sintered anodes and cathodes |
US11929215B2 (en) | 2017-01-17 | 2024-03-12 | Kemet Electronics Corporation | Wire to anode connection |
US10290429B2 (en) | 2017-01-17 | 2019-05-14 | Kemet Electronics Corporation | Wire to anode connection |
WO2019058535A1 (ja) * | 2017-09-23 | 2019-03-28 | 株式会社村田製作所 | 固体電解コンデンサおよびその製造方法 |
JP7057488B2 (ja) | 2017-09-27 | 2022-04-20 | 日亜化学工業株式会社 | 半導体装置及び半導体装置の製造方法 |
JPWO2019065077A1 (ja) * | 2017-09-29 | 2020-11-05 | パナソニックIpマネジメント株式会社 | 電解コンデンサ |
JP7306279B2 (ja) * | 2020-01-24 | 2023-07-11 | 株式会社デンソー | コンデンサモジュールおよび電力変換装置 |
JP2022149517A (ja) * | 2021-03-25 | 2022-10-07 | パナソニックIpマネジメント株式会社 | 電解コンデンサ |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003338433A (ja) * | 2002-05-22 | 2003-11-28 | Nec Tokin Corp | 固体電解コンデンサ用の陽極体、その製造方法及び固体電解コンデンサ |
JP2004071634A (ja) * | 2002-08-01 | 2004-03-04 | Rohm Co Ltd | 固体電解コンデンサ用コンデンサ素子の製造方法及びこのコンデンサ素子を使用した固体電解コンデンサの製造方法 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2927970A1 (de) | 1979-07-11 | 1981-01-29 | Fluidtech Gmbh | Vorrichtung zum filtern einer fluessigkeit, insbesondere hydraulikoel |
JP3535014B2 (ja) * | 1998-06-19 | 2004-06-07 | 松下電器産業株式会社 | 電解コンデンサ用電極 |
EP2259276A1 (en) * | 1999-05-28 | 2010-12-08 | Murata Manufacturing Co., Ltd. | Solid electrolytic capacitor and manufacturing method thereof |
JP2001085273A (ja) * | 1999-09-10 | 2001-03-30 | Matsushita Electric Ind Co Ltd | チップ形固体電解コンデンサ |
ATE275896T1 (de) * | 2000-11-16 | 2004-10-15 | Willi Horber | Gelenkprothese |
JP4521849B2 (ja) * | 2000-12-01 | 2010-08-11 | 昭和電工株式会社 | コンデンサ用ニオブ粉と該ニオブ粉を用いた焼結体および該焼結体を用いたコンデンサ |
AU2002308967B2 (en) | 2001-05-15 | 2007-12-06 | Showa Denko K.K. | Niobium monoxide powder, niobium monoxide sintered product and capacitor using niobium monoxide sintered product |
US7737066B2 (en) | 2001-05-15 | 2010-06-15 | Showa Denko K.K. | Niobium monoxide powder, niobium monoxide sintered body and capacitor using the sintered body |
JP4539948B2 (ja) | 2001-11-29 | 2010-09-08 | ローム株式会社 | コンデンサの製造方法 |
JP2003188055A (ja) * | 2001-12-14 | 2003-07-04 | Toei Kasei Kk | 固体電解コンデンサ用陽極素子及びその製造方法、並びに該固体電解コンデンサ用陽極素子を用いた固体電解コンデンサ |
JP3925781B2 (ja) | 2002-02-22 | 2007-06-06 | Necトーキン株式会社 | 固体電解コンデンサの製造方法 |
JP4010447B2 (ja) * | 2002-05-30 | 2007-11-21 | ローム株式会社 | 固体電解コンデンサ及びその製造方法 |
US7365963B2 (en) * | 2003-03-17 | 2008-04-29 | Tdk Corporation | Capacitor element, solid electrolytic capacitor, processes for their production and capacitor element combination |
JP4439848B2 (ja) * | 2003-06-30 | 2010-03-24 | 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 |
JP4343652B2 (ja) * | 2003-11-07 | 2009-10-14 | Tdk株式会社 | 固体電解コンデンサ及び固体電解コンデンサデバイス |
US7311536B2 (en) * | 2004-04-26 | 2007-12-25 | Valeo Schalter Und Sensoren Gmbh | Transmission device for transmitting electrical signals between a rotor and a stator |
JP4183091B2 (ja) * | 2005-06-15 | 2008-11-19 | ローム株式会社 | 面実装型固体電解コンデンサとその製造方法 |
-
2004
- 2004-11-30 JP JP2004346019A patent/JP4177322B2/ja not_active Expired - Fee Related
-
2005
- 2005-11-25 WO PCT/JP2005/021685 patent/WO2006059546A1/ja not_active Application Discontinuation
- 2005-11-25 KR KR1020077011899A patent/KR100904794B1/ko not_active IP Right Cessation
- 2005-11-25 CN CN201310293539.6A patent/CN103440991B/zh not_active Expired - Fee Related
- 2005-11-25 CN CNA2005800405774A patent/CN101065817A/zh active Pending
- 2005-11-25 US US11/791,568 patent/US7706131B2/en active Active
- 2005-11-30 TW TW094142109A patent/TWI284909B/zh not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003338433A (ja) * | 2002-05-22 | 2003-11-28 | Nec Tokin Corp | 固体電解コンデンサ用の陽極体、その製造方法及び固体電解コンデンサ |
JP2004071634A (ja) * | 2002-08-01 | 2004-03-04 | Rohm Co Ltd | 固体電解コンデンサ用コンデンサ素子の製造方法及びこのコンデンサ素子を使用した固体電解コンデンサの製造方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009200369A (ja) * | 2008-02-25 | 2009-09-03 | Sanyo Electric Co Ltd | 固体電解コンデンサ |
Also Published As
Publication number | Publication date |
---|---|
CN103440991B (zh) | 2016-08-17 |
CN101065817A (zh) | 2007-10-31 |
TW200636781A (en) | 2006-10-16 |
CN103440991A (zh) | 2013-12-11 |
US20080037201A1 (en) | 2008-02-14 |
JP4177322B2 (ja) | 2008-11-05 |
TWI284909B (en) | 2007-08-01 |
US7706131B2 (en) | 2010-04-27 |
KR20070064680A (ko) | 2007-06-21 |
JP2006156759A (ja) | 2006-06-15 |
KR100904794B1 (ko) | 2009-06-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2006059546A1 (ja) | 固体電解コンデンサおよびその製造方法 | |
US7595235B2 (en) | Solid electrolytic capacitor, transmission-line device, method of producing the same, and composite electronic component using the same | |
US7551424B2 (en) | Solid electrolytic capacitor | |
US7359181B2 (en) | Solid electrolytic capacitor | |
JP2009302499A (ja) | 固体電解コンデンサ及びその製造方法 | |
JP2004247594A (ja) | チップ型コンデンサ及びその製造方法並びにモールド金型 | |
JP5007677B2 (ja) | 固体電解コンデンサ及びその製造方法 | |
JP5120026B2 (ja) | 固体電解コンデンサ及びその製造方法 | |
JP2017168621A (ja) | 固体電解コンデンサおよびその製造方法 | |
WO1996027889A1 (fr) | Condensateur electrolytique monolithique et procede de fabrication | |
JP3088907B2 (ja) | 固体コンデンサとその製作方法 | |
JP2000323357A (ja) | チップ形固体電解コンデンサ | |
KR20080108662A (ko) | 고체 전해 콘덴서 및 그 제조방법 | |
JP2007013043A (ja) | 電子素子搭載用電極アセンブリ及びこれを用いた電子部品、並びに固体電解コンデンサ | |
JP4369207B2 (ja) | 固体電解コンデンサ | |
US9384899B2 (en) | Tantalum capacitor and method of manufacturing the same | |
JP7025326B2 (ja) | 固体電解コンデンサおよびその製造方法 | |
JP5784974B2 (ja) | 固体電解コンデンサおよび固体電解コンデンサの製造方法 | |
JP2003257798A (ja) | 樹脂パッケージ型電子部品及びその製造方法 | |
US10199174B2 (en) | Tantalum capacitor | |
JP2005294291A (ja) | 固体電解コンデンサ、その製造方法、および複合電子部品 | |
JP5120025B2 (ja) | 固体電解コンデンサ及びその製造方法 | |
JP5104380B2 (ja) | 固体電解コンデンサ及びその製造方法 | |
JP2005236090A (ja) | 固体電解コンデンサ及び伝送線路素子とそれらの製造方法とそれらを用いた複合電子部品 | |
JP5206958B2 (ja) | 固体電解コンデンサとその製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KM KN KP KR KZ LC LK LR LS LT LU LV LY MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 11791568 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 200580040577.4 Country of ref document: CN Ref document number: 1020077011899 Country of ref document: KR |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: COMMUNICATION ACCORDING TO RULE 69(1) EPC/FORM 1205A OF 30.08.2007 |
|
WWP | Wipo information: published in national office |
Ref document number: 11791568 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 05809640 Country of ref document: EP Kind code of ref document: A1 |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 5809640 Country of ref document: EP |