WO2007119443A1 - 積層型セラミック電子部品の製造方法及び積層型セラミック電子部品 - Google Patents
積層型セラミック電子部品の製造方法及び積層型セラミック電子部品 Download PDFInfo
- Publication number
- WO2007119443A1 WO2007119443A1 PCT/JP2007/055626 JP2007055626W WO2007119443A1 WO 2007119443 A1 WO2007119443 A1 WO 2007119443A1 JP 2007055626 W JP2007055626 W JP 2007055626W WO 2007119443 A1 WO2007119443 A1 WO 2007119443A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ceramic green
- green sheet
- carrier film
- ceramic
- electronic component
- Prior art date
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 136
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title abstract description 15
- 239000011230 binding agent Substances 0.000 claims abstract description 34
- 239000002270 dispersing agent Substances 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 claims description 24
- 238000003825 pressing Methods 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 3
- 150000008378 aryl ethers Chemical class 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 abstract description 2
- 230000007717 exclusion Effects 0.000 abstract 1
- 238000005187 foaming Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 229920006243 acrylic copolymer Polymers 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001201614 Prays Species 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920005822 acrylic binder Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002003 electrode paste Substances 0.000 description 1
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/30—Stacked capacitors
- H01G4/308—Stacked capacitors made by transfer techniques
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/30—Stacked capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F17/0013—Printed inductances with stacked layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/041—Printed circuit coils
- H01F41/046—Printed circuit coils structurally combined with ferromagnetic material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
- Y10T156/1062—Prior to assembly
Definitions
- the present invention relates to a method for manufacturing a multilayer ceramic electronic component, and more particularly to a method for manufacturing a multilayer ceramic electronic component in which ceramic green sheets supported by a carrier film are stacked, and a multilayer ceramic electronic component.
- Patent Document 1 As a method for producing a multilayer ceramic electronic component, for example, a method described in Patent Document 1 is known. In this method, in order to prevent misalignment, high-quality paper having a rough surface is placed on a lamination support table, and ceramic green sheets supported by a carrier film are laminated.
- Patent Document 1 JP-A-6-231996
- an object of the present invention is to provide a method for manufacturing a multilayer ceramic electronic component and a multilayer ceramic electronic component capable of preventing the occurrence of foaming of the first ceramic green sheet. is there.
- a method for producing a multilayer ceramic electronic component includes: Forming a first ceramic green sheet supported by a carrier film; forming a second ceramic liner sheet supported by a carrier film and having an internal electrode formed on a surface;
- the first ceramic green sheet and the second ceramic green sheet are sequentially pressure-bonded onto the first ceramic green sheet and the carrier film is peeled off, whereby the first ceramic green sheet and the second ceramic green sheet are separated. Sequentially stacking second ceramic green sheets to form a laminate;
- the ceramic green sheet of the first layer changes in the amount of binder in the thickness direction, and from the amount of binder on the surface of the carrier film supported by the carrier film, The amount of binder on the open surface opposite to the surface is large,
- the particle concentration on at least one surface of the laminate is 0.45-0.90 times the particle concentration inside the laminate
- the C-concentration (substantially meaning the volume ratio of the binder) changes in the thickness direction of the ceramic green sheet of the first layer, and the carrier film side supported by the carrier film changes.
- the C concentration of the open surface opposite to the surface on the carrier film side is 1.5 to 4.0 times the C concentration of the surface.
- the first ceramic green sheet and the second ceramic green sheet include a ceramic material, a noda resin and a dispersant, and are included in the first ceramic green sheet which becomes the first layer ceramic green sheet.
- the dispersant is a sterically hindered dispersant.
- the ceramic green sheet of the first layer has a large amount of binder on the open surface opposite to the surface on the carrier film side, so the adhesion of the open surface is strong.
- FIG. 1 is an exploded configuration diagram showing an embodiment of a multilayer ceramic electronic component according to the present invention.
- FIG. 2 is a schematic cross-sectional view of the multilayer ceramic electronic component shown in FIG.
- FIG. 3 is an explanatory view showing an embodiment of a method for producing a multilayer ceramic electronic component according to the present invention.
- FIG. 4 is an explanatory view showing a manufacturing method following FIG. 3.
- FIG. 5 is an explanatory view showing a manufacturing method following FIG. 4.
- FIG. 6 is a graph showing the particle strength in the thickness direction of the ceramic green sheet of the first layer.
- FIG. 7 is a graph showing the particle concentration ratio in the thickness direction of the ceramic green sheet of the first layer.
- FIG. 1 shows an exploded configuration of the multilayer ceramic electronic component 51
- FIG. 2 shows a schematic cross section thereof.
- the multilayer ceramic electronic component 51 is roughly mounted on the inner layer portion 10, the outer layer portion 20, and the support. It is provided with an outer layer part 40 that adheres to the sheet 5 (to be described later).
- the inner layer portion 10 is formed by laminating the inner layer ceramic green sheets 1 having the inner electrodes 3 formed on the surface.
- the outer layer portion 20 is formed by laminating the outer layer ceramic Darin sheet 2 on which no electrode is formed.
- the outer layer portion 40 is composed of a first-layer ceramic green sheet 4 that adheres to the sheet 5 placed on the support.
- a method of manufacturing the multilayer ceramic electronic component 51 will be described. First, a magnetic ceramic powder such as NiCuZn ferrite is mixed with a 2% by weight dispersant and 50% pure water by weight with respect to the magnetic ceramic powder, and zirco ball is used. Then, sufficiently mix and pulverize so that the average particle size of the magnetic ceramic becomes about 0.57 m to obtain a primary ceramic slurry.
- a magnetic ceramic powder such as NiCuZn ferrite is mixed with a 2% by weight dispersant and 50% pure water by weight with respect to the magnetic ceramic powder, and zirco ball is used. Then, sufficiently mix and pulverize so that the average particle size of the magnetic ceramic becomes about 0.57 m to obtain a primary ceramic slurry.
- binder resin acrylic copolymer
- plasticizer dibutyl phthalate
- This secondary ceramic slurry is applied onto a carrier film made of resin so that the thickness after drying becomes 35 to 50 m by a doctor blade method. Next, this is dried to form a ceramic green sheet.
- the ceramic green sheet 1 for the inner layer and the ceramic green sheet 2 for the outer layer use an anionic dispersant, for example, a polycarboxylic acid ammonium salt as a dispersant.
- the ceramic green sheets 1 and 2 have particles and binder uniformly dispersed, and the C concentration (substantially the volume ratio of the binder) of the carrier film side surface supported by the carrier film 6 (see Fig. 3). ), The C concentration on the open surface opposite to the surface on the carrier film side is 0.8 to 1.2 times.
- the first outer layer ceramic green sheet 4 uses a sterically hindered dispersing agent such as a aryl ether polymer as a dispersing agent.
- a sterically hindered dispersing agent such as a aryl ether polymer
- the dispersant is interspersed between the ceramic particles like a network, so that the free movement of the binder is suppressed, and it becomes difficult to mix the noinda and the ceramic powder.
- the binder is light, we pray upwards and the C concentration changes in the thickness direction. More specifically, the C concentration on the carrier film side surface supported by the carrier film 6 is opposite to the carrier film side surface.
- the C concentration on the open side of the pair is 1.5 to 4.0 times.
- the method for changing the C concentration is not limited to the method of changing the type of dispersant, and may be a method of changing the type of binder or the combination of binders.
- an electrode paste having an Ag force is applied to the surface of the inner layer ceramic green sheet 1 by screen printing to form the internal electrode 3.
- an outer layer ceramic green sheet 4 is pressure-bonded onto a sheet 5 (for example, a high-quality paper having a rough surface) placed on a support 61 and a carrier film. Remove 6 to make the first layer of ceramic green sheet.
- a sheet 5 for example, a high-quality paper having a rough surface
- the outer layer portion 20 is formed by peeling the carrier film 6 by sequentially pressing the ceramic green sheet 2 for outer layer onto the ceramic green sheet 4 of the first layer.
- the inner layer portion 10 is formed by sequentially pressing the ceramic green sheets 1 for the inner layer and peeling the carrier film 6.
- the outer layer portion 20 is formed by sequentially pressing the ceramic green sheets 2 for the outer layer and peeling the carrier film 6.
- the laminated body 50 is formed.
- the laminate 50 is main-bonded at a pressure of lOOMPa. Further, it is cut into a predetermined product size, removed from the binder and fired to obtain a sintered body. After this sintered body is barrel-polished, external electrodes 9 are formed at both ends of the sintered body so as to be electrically connected to predetermined internal electrodes 3. Thereby, a multilayer ceramic electronic component 51 as shown in FIG. 2 is obtained.
- Table 1 shows the ceramic green sheet of the first layer in the multilayer ceramic electronic component 51.
- the C concentration ratio is determined by EDX analysis, and the surface of the formed ceramic green sheet 4 on the carrier film side The C detection intensity of the film and the C detection intensity of the open surface opposite to the surface on the carrier film side were measured, and the ratio of the C concentration of the open surface to the C concentration of the surface on the carrier film side was calculated.
- the particle concentration ratio of the laminated ceramic electronic component 51 horizontally polished by using a wavelength dispersive X-ray spectrometer is the same as the molar ratio of the magnetic powder and other than Fe and Fe in the electronic component 51.
- the particle concentration (particle strength) was evaluated based on the total amount of elements. That is, the concentration gradient was obtained from the surface to the inside, and the particle concentration in the portion where the gradient was saturated was adopted as the internal particle concentration. The particle concentration indicates that the surface becomes porous due to binder segregation. As shown in Fig. 6 and Fig. 7, the particle concentration gradient is saturated around 35 m from the surface. The concentration ratio between the surface and the interior is 0.67. Higher particle concentration results in higher particle strength.
- the size of multilayer ceramic electronic component 51 is 3.2mm X l. 6mm X O. 85mm
- Sample Nos. 1, 2, and 3 are cases in which the ceramic green sheet 4 of the first layer is one in which the filler is dispersed almost uniformly. In this case, in Sample Nos. 1, 2, and 3, foam was generated between the sheet 5 and the ceramic green sheet 4. This is because the adhesion between the sheet 5 and the ceramic green sheet 4 is weak.
- Sample Nos. 15, 16, and 17 are cases where ceramic green sheets 2 and 4 in which the ceramic green sheets 2 and 4 of the laminated body 50 are made to have the same specifications are used.
- a sintered streak was generated in a striped manner on the surface of the electronic component 51 after sintering.
- the ceramic green sheets 2 and 4 have a large amount of binder on the side opposite to the carrier film side, so the trace of the binder burned off during binder removal and firing remains and the glossiness changes. .
- the water absorption rate becomes high, which causes solder explosion. Therefore, ceramic green sheets 2 and 4 with a C concentration ratio of 1.5 to 4.0 cannot be used, and it is necessary to segregate the binder of only ceramic green sheet 4 in the first layer. I understand that there is.
- the particle concentration on at least one surface of the multilayer body 50 is 0.45-0.90 times the particle concentration inside the multilayer body 50.
- the ceramic layer of the first layer Four sheet force The amount of binder on the open surface opposite to the surface on the carrier film 6 side is increased, so the adhesive force on the open surface is strong.
- the adhesion between the sheet 5 placed on the support 61 and the ceramic green sheet 4 of the first layer is strengthened, and the occurrence of bubble clogging of the ceramic green sheet 4 of the first layer is suppressed.
- Sample No. 14 has suppressed occurrence of short-circuiting and solder explosion caused by bubble formation, sintering streaks.
- the laminated body 50 and the sheet 5 were peeled off, a part of the first layer ceramic ceramic sheet 4 was peeled off, resulting in sheet peeling. This is because the adhesion between the sheet 5 and the ceramic green sheet 4 is too strong.
- the C concentration ratio of 1.5 to 4.0 (Sample Nos. 4 to 13) is preferable.
- the C concentration ratio is 1.5 to 4.0, the particle concentration on the surface becomes the internal particle concentration.
- a method for praying a binder in addition to a method using a sterically hindered dispersant, a method using a binder that is not compatible with a ceramic material dispersant may be used. This is because the binder does not mix with the ceramic material, so the binder prays.
- the binder for example, vinyl acetate may be used in addition to the acrylic copolymer (water-soluble acrylic binder).
- the present invention is useful for a multilayer ceramic electronic component, and is particularly excellent in that it can prevent the occurrence of foaming of the first-layer ceramic green sheet.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Capacitors (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800010849A CN101351855B (zh) | 2006-04-05 | 2007-03-20 | 层叠型陶瓷电子器件的制造方法以及层叠型陶瓷电子器件 |
KR1020087007265A KR101051404B1 (ko) | 2006-04-05 | 2007-03-20 | 적층형 세라믹 전자 부품의 제조 방법 및 적층형 세라믹전자 부품 |
JP2008510821A JP4715921B2 (ja) | 2006-04-05 | 2007-03-20 | 積層型セラミック電子部品の製造方法及び積層型セラミック電子部品 |
US12/103,089 US7828919B2 (en) | 2006-04-05 | 2008-04-15 | Method for manufacturing multilayer ceramic electronic component and multilayer ceramic electronic component |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006104454 | 2006-04-05 | ||
JP2006-104454 | 2006-04-05 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/103,089 Continuation US7828919B2 (en) | 2006-04-05 | 2008-04-15 | Method for manufacturing multilayer ceramic electronic component and multilayer ceramic electronic component |
Publications (1)
Publication Number | Publication Date |
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WO2007119443A1 true WO2007119443A1 (ja) | 2007-10-25 |
Family
ID=38609231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2007/055626 WO2007119443A1 (ja) | 2006-04-05 | 2007-03-20 | 積層型セラミック電子部品の製造方法及び積層型セラミック電子部品 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7828919B2 (ja) |
JP (1) | JP4715921B2 (ja) |
KR (1) | KR101051404B1 (ja) |
CN (1) | CN101351855B (ja) |
WO (1) | WO2007119443A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009212261A (ja) * | 2008-03-04 | 2009-09-17 | Tdk Corp | 積層型電子部品の製造方法 |
JP2021174784A (ja) * | 2020-04-17 | 2021-11-01 | 株式会社村田製作所 | コイル部品およびその製造方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5304800B2 (ja) * | 2008-12-26 | 2013-10-02 | 株式会社村田製作所 | セラミック電子部品の製造方法およびセラミック電子部品 |
KR101983136B1 (ko) * | 2012-12-28 | 2019-09-10 | 삼성전기주식회사 | 파워 인덕터 및 그 제조방법 |
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JPH01125912A (ja) * | 1987-11-11 | 1989-05-18 | Tdk Corp | 積層応用部品 |
JP2002313672A (ja) * | 2001-04-13 | 2002-10-25 | Murata Mfg Co Ltd | 積層型セラミック電子部品およびその製造方法ならびにセラミックペーストおよびその製造方法 |
JP2007123678A (ja) * | 2005-10-31 | 2007-05-17 | Matsushita Electric Ind Co Ltd | 積層セラミック電子部品およびその製造方法 |
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JPH01169989A (ja) * | 1987-12-24 | 1989-07-05 | Ngk Insulators Ltd | セラミックグリーンシート |
JPH03283496A (ja) | 1990-03-30 | 1991-12-13 | Fujitsu Ltd | 多層セラミック回路基板の製法 |
JPH06231996A (ja) | 1992-12-10 | 1994-08-19 | Taiyo Yuden Co Ltd | 積層セラミック電子部品の製造方法 |
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JPH08316092A (ja) * | 1995-05-19 | 1996-11-29 | Murata Mfg Co Ltd | 積層セラミック電子部品の製造方法 |
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2007
- 2007-03-20 CN CN2007800010849A patent/CN101351855B/zh active Active
- 2007-03-20 JP JP2008510821A patent/JP4715921B2/ja active Active
- 2007-03-20 KR KR1020087007265A patent/KR101051404B1/ko active IP Right Grant
- 2007-03-20 WO PCT/JP2007/055626 patent/WO2007119443A1/ja active Application Filing
-
2008
- 2008-04-15 US US12/103,089 patent/US7828919B2/en active Active
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JP2002313672A (ja) * | 2001-04-13 | 2002-10-25 | Murata Mfg Co Ltd | 積層型セラミック電子部品およびその製造方法ならびにセラミックペーストおよびその製造方法 |
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JP2021174784A (ja) * | 2020-04-17 | 2021-11-01 | 株式会社村田製作所 | コイル部品およびその製造方法 |
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Also Published As
Publication number | Publication date |
---|---|
KR20080056168A (ko) | 2008-06-20 |
CN101351855A (zh) | 2009-01-21 |
CN101351855B (zh) | 2011-08-31 |
JPWO2007119443A1 (ja) | 2009-08-27 |
JP4715921B2 (ja) | 2011-07-06 |
US20080199724A1 (en) | 2008-08-21 |
KR101051404B1 (ko) | 2011-07-22 |
US7828919B2 (en) | 2010-11-09 |
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