WO2003009320A1 - Production method for solid electrolytic capacitor - Google Patents
Production method for solid electrolytic capacitor Download PDFInfo
- Publication number
- WO2003009320A1 WO2003009320A1 PCT/JP2002/007218 JP0207218W WO03009320A1 WO 2003009320 A1 WO2003009320 A1 WO 2003009320A1 JP 0207218 W JP0207218 W JP 0207218W WO 03009320 A1 WO03009320 A1 WO 03009320A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- forming
- hole
- aluminum foil
- solid electrolytic
- insulating film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
-
- 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
Definitions
- the present invention relates to a method for manufacturing a solid electrolytic capacitor used for various electronic devices.
- solid electrolytic capacitors which are electronic components, have become smaller, have larger capacitance, lower ESR (equivalent series resistance), and lower ESL (equivalent series inductance). It has been demanded.
- ESR Equivalent series resistance
- ESL Equivalent series inductance
- the conventional SEC described above uses a metal foil having a valve action, such as aluminum or tantalum, or a sintered body as an electrode portion, forms a dielectric layer on the surface of the metal foil or sintered body, and forms a solid electrolyte on the surface.
- the capacitor element is formed by forming a layer, forming a current collector layer on the surface of the solid electrolyte layer, and further providing an electrode layer. Further, the electrode section and the electrode layer of the capacitor element are connected to connection terminals, respectively, and an exterior is provided so as to expose the connection terminals to form an SEC.
- An object of the present invention is to solve the above problems and to provide a method of manufacturing an SEC that can be directly connected to a semiconductor component, realizes low ESR and low ESL, and has excellent high-frequency characteristics. Disclosure of the invention
- the present invention provides a step of forming a resist film on one side of an aluminum foil; a step of forming a first through hole at a predetermined position of the aluminum foil; Forming an insulating film so as to fill a surface opposite to the surface on which the resist film is formed and the first through hole; roughening the aluminum foil in a portion where the resist film is removed; Forming a dielectric layer on the surface of the planarized aluminum foil; forming a second through hole in the insulating film filling the first through hole; A step of forming a solid or electrolyte layer on the surface of the dielectric layer subsequent to a step of forming a sulfol electrode in the through hole; a step of forming a current collector layer on the surface of the solid electrolyte; Forming an opening in the insulating film; forming a first connection terminal in the opening; and forming a second connection terminal on the exposed surface of the sulfol electrode.
- FIG. 1 is a perspective view of the SEC according to the first embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the SEC according to the first embodiment of the present invention.
- FIG. 3 is an enlarged cross-sectional view of a main part of the SEC according to the first embodiment of the present invention.
- FIG. 4 is a cross-sectional view showing a state in which a resist film is formed on the SEC aluminum foil according to Embodiment 1 of the present invention.
- FIG. 5 is a cross-sectional view showing a state in which a first through hole is formed in the SEC aluminum foil according to Embodiment 1 of the present invention.
- FIG. 6 is a cross-sectional view showing a state where an insulating film is formed on the SEC aluminum foil according to Embodiment 1 of the present invention.
- FIG. 7 is a cross-sectional view of the first embodiment of the present invention with the SEC resist film removed.
- FIG. 8 is a cross-sectional view showing a state in which a dielectric layer is formed on the surface of an aluminum foil having a roughened SEC according to Embodiment 1 of the present invention.
- FIG. 9 is a cross-sectional view showing a state in which a second through hole is formed in the SEC aluminum foil according to Embodiment 1 of the present invention.
- FIG. 10 is a cross-sectional view of the first embodiment of the present invention in a state where the second sulfol of SEC is filled with a conductor.
- FIG. 11 is a cross-sectional view showing a state where a solid electrolyte layer is formed on a dielectric layer of SEC according to Embodiment 1 of the present invention.
- FIG. 12 is a cross-sectional view of a state where a current collector layer of SEC according to Embodiment 1 of the present invention is formed.
- FIG. 13 is a cross-sectional view of the first embodiment of the present invention in which an opening of the SEC is formed.
- FIG. 14 is a cross-sectional view showing a state where a first connection terminal of SEC according to Embodiment 1 of the present invention is formed.
- FIG. 15 shows connection bumps of SEC in Embodiment 1 of the present invention. It is sectional drawing of the state which formed.
- FIG. 16 is a cross-sectional view showing a state where a solid electrolyte layer is formed on a dielectric layer of SEC according to Embodiment 2 of the present invention.
- FIG. 17 is a cross-sectional view showing a state in which a second through-hole is formed in the SEC aluminum foil according to Embodiment 2 of the present invention.
- FIG. 18 is a cross-sectional view of the second embodiment of the present invention in a state in which the second sulfol of SEC is filled with a conductor.
- FIG. 19 is a cross-sectional view of a state where a current collector layer of SEC according to Embodiment 2 of the present invention has been formed.
- FIG. 20 is a cross-sectional view of the second embodiment of the present invention in a state where an SEC opening is formed.
- FIG. 21 is a cross-sectional view showing a state where a first connection terminal of SEC according to Embodiment 2 of the present invention is formed.
- BEST MODE FOR CARRYING OUT THE INVENTION a method for manufacturing a solid electrolytic capacitor (SEC) of the present invention will be described with reference to embodiments and drawings. It should be noted that the drawings are schematic diagrams, and do not show dimensions accurately.
- the aluminum foil 20 has a roughened surface on one side, and a dielectric layer 27 is formed on the surface of the roughened aluminum foil 20. Further, a solid electrolyte layer 29 serving as a substantial electrode is formed on the surface, and functions as a capacitor together with the aluminum foil 20. The surface roughening of the aluminum foil 20 is performed in order to increase the surface area of the electrode portion and to improve the capacitance of the SEC. On the surface of the solid electrolyte layer 29, a current collector layer 30 for facilitating extraction of the electrode to the outside is provided. Further, the current collector layer 30 is connected to the second connection terminal 32 via a through-hole electrode 28. The through hole electrode 28 is formed by filling the inside of the second through hole 36 with a conductor, and is electrically insulated from the aluminum foil 20 by the insulating film 25.
- the first connection terminal 31 is directly connected to the aluminum foil 20, and the first connection terminal 31 and the second connection terminal 32 are electrically insulated by the insulating film 25. .
- the connection terminals 3 1 and 3 2 are provided with connection bumps 3 3 and 3 4, respectively, for directly connecting to semiconductor components.
- the semiconductor component can be directly connected to the SEC.
- wiring between components can be significantly reduced, and ESR and ESL can be reduced.
- connection terminals as shown in FIG. 1, the current flows in opposite directions, and the magnetic fields generated thereby cancel each other out, and the effect of reducing ESL is obtained.
- 4 to 15 are cross-sectional views showing the steps of manufacturing the SEC.
- a resist film 23 is formed on one side of an aluminum foil 20.
- Either a photosensitive resin or an organic film having an adhesive property is used as the resist film 23.
- As the forming method for example, dipping, spin coating, screen printing, film bonding, or spraying is used. In any case, these one-sided resist films 23 can be formed easily and with high productivity.
- a photosensitive resin is used, there is an advantage that application and curing are easy, and when an organic film is used, the process can be simplified, and the resist film 2 on one side can be realized later. There is an advantage that peeling of 3 is easy.
- a first through hole 24 is formed in the aluminum foil 20.
- the first through hole 24 is formed at an arbitrary position with high precision by using at least one of a laser processing method, a punching method, a drilling method, and a discharge processing method. can do.
- an insulating film 25 is formed so as to fill the surface of the aluminum foil 20 opposite to the surface on which the resist film 23 is formed and the first through hole.
- the material of the insulating film 25 is preferably selected from an epoxy resin, a polyimide resin, a silicon resin, an acrylic resin, and a phenol resin.
- the above materials are excellent in insulation, solvent resistance and heat resistance, and also excellent in adhesion to aluminum LIN 20 as an electrode part.
- the insulating film 25 is formed by at least one of immersion, spin coating, screen printing, spraying, and electrodeposition.
- Either method can easily and uniformly form the insulating film 25 on the surface of the aluminum foil 20.
- the periphery of the edge of the first through hole 24 of the aluminum foil 20 may be chamfered. This is performed to remove burrs that may be generated when the first through hole 24 is formed. 3 ⁇ 4 enhance the sex, As a result, there is an effect of preventing a short circuit between the through-hole electrode 28 and the aluminum foil 20.
- the dielectric property of the dielectric layer 27 formed on the surface of the aluminum foil 20 is enhanced, and as a result, the solid electrolyte layer 29 and the aluminum foil 20 It has the effect of preventing short circuits. These effects stabilize SEC characteristics and improve reliability.
- the resist film 23 on one side of the aluminum foil 20 is removed by a method such as immersion in a resist remover.
- the surface of the aluminum foil 20 from which the resist film 23 on one side was removed was roughened by etching, and the roughened aluminum foil 20 was removed.
- a dielectric layer 27 is formed on the surface.
- the surface roughening method includes an etching method, for example, by applying a predetermined voltage while dipping in an acid solution, or by only dipping in an acid solution.
- the dielectric layer is formed by, for example, a method of anodizing the aluminum foil 20 in an aqueous solution of ammonium adipic acid or a mixed solution of boric acid and borax. Fig.
- FIG. 9 shows that the insulating film 25 filling the first through hole 24 has the insulating film 25 left on the wall of the first through hole 24 so that the second through hole 36
- the second through-hole 36 is formed in the insulating film filling the first through-hole by using any one of a laser processing method, a punching processing method, and a drilling method. It can be formed with high precision.
- FIG. 10 shows a state in which a conductive adhesive is filled in the second through hole 36 and the through hole electrode 28 is formed by a method of curing. This manufacturing method allows The electrode 28 can be easily formed.
- FIG. 11 shows a state in which a hazardous electrolyte layer 29 is formed on the surface of the dielectric layer 27.
- the solid electrolyte layer 29 is formed by chemically polymerizing a heterocyclic monomer such as pyrrole or thiophene using an oxidizing agent such as ferric sulfate or dipping the aluminum foil 20 in a heterocyclic monomer solution.
- a crushing voltage is applied to polymerize the polymer by electropolymerization, etc., manganese dioxide formed by thermal decomposition of manganese nitrate, and a powder suspension of conductive polymer.
- the coating is formed by using at least one selected from the group consisting of a coating formed by coating and a coating formed by coating an aqueous conductive polymer solution.
- a conductive polymer obtained by the above various methods may be formed.
- the effect of uniformly and densely forming the conductive polymer can be obtained.
- the solid electrolyte layer 29 can be formed also on the surface of the dielectric layer 27 in the fine etching pit formed by the roughening, so that the SEC static This can contribute to an increase in electric capacity.
- FIG. 12 shows a state where the current collector layer 30 is formed on the surface of the solid electrolyte layer 29.
- the formation is performed by applying at least one of a suspension of carbon fine particles, a conductive adhesive, and a conductive paint.
- ESR is reduced and high-frequency characteristics are reduced. Effects that contribute to improvement Have.
- FIG. 13 shows a state in which an opening 37 is formed in the insulating film portion by a laser processing method or a grinding method to form a first connection terminal 31 on the other surface of the aluminum foil 20. Is shown.
- FIG. 14 shows a state in which the first connection terminal 31 is provided in the opening 37.
- the first connection terminal 31 is formed for good connection with other components, and is connected to the aluminum foil 20.
- the first connection terminal 31 As a method for forming the first connection terminal 31, it is preferable to apply a conductive adhesive, or to use electroplating, electroless plating, or the like.
- the first connection terminals 31 can be uniformly and simply formed in the opening 37 at a time.
- a second connection terminal 32 is formed on the exposed portion of the through-hole electrode 28 by a method such as electroplating or electroless plating to improve the connection with the semiconductor component, if necessary. May be.
- FIG. 15 shows a state in which at least one of solder, gold, tin, silver, etc. is formed on the first connection terminal 31 and the second connection terminal 32 of FIG. Connection bump 3 3 and second connection This shows a state where the bumps 34 are formed.
- the second connection bumps may be formed directly without providing the second connection terminals 32.
- connection terminals are on the same surface, direct connection with semiconductor components is possible. According to the manufacturing method described above, low ESR and low ESL are realized, and SEC having excellent high-frequency characteristics can be easily provided.
- FIG. 16 shows that a dielectric layer 27 is formed on the surface of the roughened aluminum foil 20 as shown in FIG. 8 of the first embodiment, and then a solid electrolyte layer 29 is formed on the surface. The state in which it was formed is shown.
- This solid electrolyte layer 29 is formed by the same method as in the first embodiment.
- the difference from the first embodiment is that the sulfol electrode 28 is not formed at this point, which has the following advantages. That is, since the through-hole electrode 28 uses a conductive adhesive as a material, the through-hole electrode 28 may be affected by swelling, dissolution, peeling, or the like from a solvent used when forming the solid electrolyte layer 29.
- a second through hole 36 is formed by a laser beam method, a punching method, a drill method, an electric discharge machining method, or the like.
- the inside of the second through hole 36 is filled with a conductive adhesive and cured to form the through hole electrode 28.
- FIG. 19 shows a state where the current collector layer 30 is formed on the surface of the solid electrolyte layer 29. The difference between FIG.
- FIG. 19 and FIG. 12 of the first embodiment is that the through-hole electrode 28 of FIG. 12 is connected to the solid electrolyte layer 29, whereas the through-hole electrode of FIG. Reference numeral 28 denotes a point connected to the current collector layer 30 in addition to the solid electrolyte layer 29.
- an opening 37 is provided as shown in FIGS. 20 and 21, and a first connection terminal 31 is formed in the opening 37. You can get SEC.
- the feature of the production method of the present invention is that the aluminum foil 20 before etching is used as a starting material for production, and has the following advantages. That is, in the process of removing the resist film 23 on one side of the aluminum foil 20 after the first through hole 24 is formed, according to the present invention, only the organic solvent is used as the resist remover according to the present invention. In addition, the use of acids and alkaline solutions is also possible. When removing the resist film 23 on one side using the roughened aluminum foil 20 as a starting material, when using an acid or an alkaline solution, the resist film 23 on one side is used. Not only that, the surface of the roughened aluminum foil 20 also melts, increasing the possibility of lowering the capacitance as SEC.
- the range of selection when selecting the conductive adhesive can be expanded.
- the present invention has a high degree of freedom in process design. Can be easily manufactured.
- the SEC manufactured using the present invention has the following features. That is, the first connection terminal and the second connection terminal are arranged on the same surface, and can be directly connected to a semiconductor as a power source of a semiconductor component, and have excellent high-frequency characteristics.
- the present invention has a high degree of freedom in process design, so that SEC can be manufactured easily and with high accuracy, and high productivity can be realized, and its industrial value is great. .
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003514574A JP3982496B2 (ja) | 2001-07-17 | 2002-07-16 | 固体電解コンデンサの製造方法 |
| EP02746095A EP1408521A4 (en) | 2001-07-17 | 2002-07-16 | PRODUCTION METHOD FOR A FIXED ELECTROLYTE CONDENSER |
| CNB028024206A CN100339918C (zh) | 2001-07-17 | 2002-07-16 | 固体电解电容器的制造方法 |
| US10/363,132 US6852137B2 (en) | 2001-07-17 | 2002-07-16 | Method for manufacturing solid electrolytic capacitor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001-216351 | 2001-07-17 | ||
| JP2001216351 | 2001-07-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003009320A1 true WO2003009320A1 (en) | 2003-01-30 |
Family
ID=19050837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2002/007218 Ceased WO2003009320A1 (en) | 2001-07-17 | 2002-07-16 | Production method for solid electrolytic capacitor |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6852137B2 (ja) |
| EP (1) | EP1408521A4 (ja) |
| JP (1) | JP3982496B2 (ja) |
| CN (1) | CN100339918C (ja) |
| WO (1) | WO2003009320A1 (ja) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2485710C (en) * | 2002-05-10 | 2011-04-19 | Karl R. Lewis | Monolithic rail platform and bolt assemblies for a firearm |
| JP4019837B2 (ja) * | 2002-07-19 | 2007-12-12 | 松下電器産業株式会社 | 固体電解コンデンサ及びその製造方法 |
| US7016180B2 (en) * | 2003-12-26 | 2006-03-21 | Tdk Corporation | Capacitor |
| US6870728B1 (en) * | 2004-01-29 | 2005-03-22 | Tdk Corporation | Electrolytic capacitor |
| CN1998056A (zh) * | 2004-07-15 | 2007-07-11 | 松下电器产业株式会社 | 电容器 |
| TWI270901B (en) * | 2005-09-16 | 2007-01-11 | Ctech Technology Corp | Solid capacitor and fabrication method thereof |
| JP4478695B2 (ja) * | 2007-03-19 | 2010-06-09 | ニチコン株式会社 | 固体電解コンデンサ素子およびそれを備えた固体電解コンデンサ |
| JP4743896B2 (ja) * | 2007-04-19 | 2011-08-10 | Necトーキン株式会社 | 固体電解コンデンサ |
| JP4931776B2 (ja) * | 2007-11-21 | 2012-05-16 | 三洋電機株式会社 | 固体電解コンデンサ |
| US8470680B2 (en) | 2008-07-28 | 2013-06-25 | Kemet Electronics Corporation | Substrate with embedded patterned capacitance |
| KR20100110613A (ko) * | 2009-04-03 | 2010-10-13 | 삼성전자주식회사 | 반도체 장치 및 그 제조방법 |
| TWI405322B (zh) | 2010-12-29 | 2013-08-11 | Ind Tech Res Inst | 內藏電容基板模組 |
| US9013893B2 (en) | 2010-12-29 | 2015-04-21 | Industrial Technology Research Institute | Embedded capacitor module |
| TWI483352B (zh) | 2012-03-12 | 2015-05-01 | Ind Tech Res Inst | 固態電解電容基板模組及包括該固態電解電容基板模組的電路板 |
| WO2017145700A1 (ja) | 2016-02-23 | 2017-08-31 | 株式会社村田製作所 | コンデンサ |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000049054A (ja) * | 1998-05-22 | 2000-02-18 | Matsushita Electric Ind Co Ltd | 電解コンデンサおよびその製造方法 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5845171B2 (ja) * | 1976-01-30 | 1983-10-07 | 日本電気株式会社 | 固体電解コンデンサの製造方法 |
| JPH02137311A (ja) * | 1988-11-18 | 1990-05-25 | Marcon Electron Co Ltd | 固体電解コンデンサ |
| JPH02301118A (ja) * | 1989-05-15 | 1990-12-13 | Nippon Chemicon Corp | 固体電解コンデンサの製造方法 |
| JPH05205984A (ja) | 1992-01-27 | 1993-08-13 | Nec Corp | 積層型固体電解コンデンサ |
| JP3351224B2 (ja) * | 1996-01-31 | 2002-11-25 | 日立エーアイシー株式会社 | 電解コンデンサ |
| JPH11274002A (ja) | 1998-03-25 | 1999-10-08 | Nichicon Corp | チップ型積層固体電解コンデンサ |
| US6239965B1 (en) * | 1998-05-22 | 2001-05-29 | Matsushita Electric Industrial Co., Ltd. | Electrolytic capacitor and method of producing the same |
| US6275729B1 (en) * | 1998-10-02 | 2001-08-14 | Cardiac Pacemakers, Inc. | Smaller electrolytic capacitors for implantable defibrillators |
| JP4479050B2 (ja) * | 2000-04-20 | 2010-06-09 | パナソニック株式会社 | 固体電解コンデンサ |
| JP4432207B2 (ja) * | 2000-05-25 | 2010-03-17 | パナソニック株式会社 | コンデンサ |
-
2002
- 2002-07-16 WO PCT/JP2002/007218 patent/WO2003009320A1/ja not_active Ceased
- 2002-07-16 EP EP02746095A patent/EP1408521A4/en not_active Withdrawn
- 2002-07-16 JP JP2003514574A patent/JP3982496B2/ja not_active Expired - Fee Related
- 2002-07-16 US US10/363,132 patent/US6852137B2/en not_active Expired - Fee Related
- 2002-07-16 CN CNB028024206A patent/CN100339918C/zh not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000049054A (ja) * | 1998-05-22 | 2000-02-18 | Matsushita Electric Ind Co Ltd | 電解コンデンサおよびその製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20030182781A1 (en) | 2003-10-02 |
| JPWO2003009320A1 (ja) | 2004-11-11 |
| EP1408521A4 (en) | 2007-04-04 |
| JP3982496B2 (ja) | 2007-09-26 |
| US6852137B2 (en) | 2005-02-08 |
| EP1408521A1 (en) | 2004-04-14 |
| CN1465078A (zh) | 2003-12-31 |
| CN100339918C (zh) | 2007-09-26 |
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