WO2008001542A1 - Composant électronique en céramique et son procédé de fabrication - Google Patents
Composant électronique en céramique et son procédé de fabrication Download PDFInfo
- Publication number
- WO2008001542A1 WO2008001542A1 PCT/JP2007/058487 JP2007058487W WO2008001542A1 WO 2008001542 A1 WO2008001542 A1 WO 2008001542A1 JP 2007058487 W JP2007058487 W JP 2007058487W WO 2008001542 A1 WO2008001542 A1 WO 2008001542A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- conductive resin
- electronic component
- resin layer
- layer
- conductive
- Prior art date
Links
- 239000000919 ceramic Substances 0.000 title claims description 37
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 238000000034 method Methods 0.000 title description 11
- 239000011347 resin Substances 0.000 claims abstract description 147
- 229920005989 resin Polymers 0.000 claims abstract description 147
- 238000007747 plating Methods 0.000 claims abstract description 47
- 239000002184 metal Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000011231 conductive filler Substances 0.000 claims abstract description 21
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 11
- 229910052709 silver Inorganic materials 0.000 claims description 11
- 239000004332 silver Substances 0.000 claims description 11
- 239000005011 phenolic resin Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 2
- 230000009974 thixotropic effect Effects 0.000 claims description 2
- 239000003985 ceramic capacitor Substances 0.000 abstract description 33
- 238000010304 firing Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 158
- 230000035882 stress Effects 0.000 description 31
- 238000005476 soldering Methods 0.000 description 16
- 239000012790 adhesive layer Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 229910000679 solder Inorganic materials 0.000 description 6
- 239000000945 filler Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000032798 delamination Effects 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 229910017944 Ag—Cu Inorganic materials 0.000 description 1
- 239000004840 adhesive resin Substances 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000011134 resol-type phenolic resin Substances 0.000 description 1
- 229920003987 resole Polymers 0.000 description 1
- OGFYIDCVDSATDC-UHFFFAOYSA-N silver silver Chemical compound [Ag].[Ag] OGFYIDCVDSATDC-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000001629 suppression Effects 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
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
- H01G13/006—Apparatus or processes for applying terminals
-
- 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
- H01G4/228—Terminals
- H01G4/252—Terminals the terminals being coated on the capacitive element
-
- 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
- H01G4/002—Details
- H01G4/228—Terminals
- H01G4/232—Terminals electrically connecting two or more layers of a stacked or rolled capacitor
- H01G4/2325—Terminals electrically connecting two or more layers of a stacked or rolled capacitor characterised by the material of the terminals
-
- 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
Definitions
- the present invention relates to a ceramic electronic component and a method for manufacturing the same, and more particularly to a structure of a terminal electrode provided in a ceramic electronic component and a method for manufacturing the same.
- Ceramic ceramic components of interest to the present invention include multilayer ceramic electronic components such as multilayer ceramic capacitors.
- FIG. 3 shows a cross-sectional view of a conventional multilayer ceramic capacitor 1.
- the multilayer ceramic capacitor 1 includes an electronic component body 2 made of ceramic.
- the electronic component body 2 has two end faces 3 and 4 facing each other and a side face 5 connecting them.
- the electronic component body 2 includes a plurality of laminated dielectric ceramic layers 6 and internal electrodes 7 and 8 formed along a specific interface between the dielectric ceramic layers 6.
- the multilayer ceramic capacitor 1 also has terminal electrodes 9 and 10 formed so as to cover the end faces 3 and 4 of the electronic component body 2 and to extend to part of the force side surfaces 5 of the end faces 3 and 4, respectively. It has.
- the internal electrode 7 is electrically connected to one terminal electrode 9, and the internal electrode 8 is electrically connected to the other terminal electrode 10.
- the internal electrodes 7 and the internal electrodes 8 are alternately arranged in the stacking direction.
- the terminal electrodes 9 and 10 are usually formed by applying a conductive metal paste to a predetermined region on the surface of the electronic component body 2 and baking it. A film layer and an adhesive layer formed by performing plating on the film layer are provided.
- the multilayer ceramic capacitor 1 is mounted on a wiring board 11 as shown in FIG. More specifically, solder fillets 14 and 15 are formed on the conductive lands 12 and 13 provided on the wiring board 11 by soldering, and the terminal electrodes 9 and 10 are connected via the solder fillets 14 and 15. Each electrically connected It is assumed that
- the glass component contained in the conductive metal paste to be the thick film layer and the ceramic on the electronic component main body 2 side As a result, a fragile reaction layer is formed at the interface between the thick film layer and the electronic component body 2. For this reason, when a relatively large stress is applied to the leading edge of the thick film layer, cracks may occur in the electronic component body 2 from that point. For example, as shown in FIG.
- the internal electrode 7 or the crack may progress toward the internal electrode 7 or 8, and the multilayer ceramic capacitor 1 may cause a short circuit failure.
- the terminal electrode having the above-described structure when a stress exceeding a predetermined level is applied, delamination occurs in the terminal electrode to reduce the stress. For this reason, the bonding force at the interface where such delamination is scheduled is set to be relatively weak, and in particular, the tip portion of the terminal electrode is vulnerable to tensile stress.
- the conductive resin may be used when forming a plating layer, transporting the multilayer ceramic capacitor, or mounting the multilayer ceramic capacitor on the wiring board by soldering.
- the layer formed on the layer exerts a tensile stress on the conductive resin layer, and this stress is concentrated on the leading edge of the plating layer, that is, the leading edge of the conductive resin layer.
- the conductive resin layer may be peeled off starting from the leading edge.
- the multilayer ceramic capacitor is mounted If the conductive resin layer is peeled off from the beginning, the stress relief ability of the conductive resin layer cannot be exhibited when a large stress S is applied to the multilayer ceramic capacitor. Capacitors may crack and cause short circuits.
- Patent Document 1 Japanese Patent No. 3363369
- Patent Document 2 Japanese Patent Laid-Open No. 10-284343
- an object of the present invention is to provide a ceramic electronic component and a method for manufacturing the same, which can solve the above-described problems.
- the present invention provides an electronic component main body having two end surfaces opposed to each other and a side surface connecting them, covering each end surface of the electronic component main body, and from each end surface to a part of the side surface.
- the following configuration particularly the following terminal electrode, is provided. It is characterized by having a configuration.
- the terminal electrode includes a thick film layer having a thick film force by baking of a conductive metal, a conductive resin layer including a thermosetting resin and a conductive filler, and conductive And a plating layer with a strong metal adhesion.
- the thick film layer is formed on each end surface and part of the side surface of the electronic component main body.
- the conductive resin layer covers the thick film layer and is formed on the side surface so as to extend beyond the leading edge of the thick film layer with a dimension of 100 ⁇ m or more. And there exists an area
- the plating layer is formed so as to cover the conductive resin layer except for a region extending with a width of 50 ⁇ m or more along the edge of the conductive resin layer.
- the conductive resin layer preferably has a bonding force in the range of 0.3 to: ONZmm 2 with respect to the electronic component body.
- thermosetting resin contained in the conductive resin layer is phenol.
- the conductive resin contained in the conductive resin layer is a silver-coated copper powder.
- the present invention is also directed to a method of manufacturing a ceramic electronic component having the above-described characteristic configuration.
- a method of manufacturing a ceramic electronic component according to the present invention includes a step of preparing an electronic component main body having two end surfaces that are made of ceramic and are opposed to each other and a side surface that connects the two end surfaces, and each end surface of the electronic component main body includes And forming a terminal electrode so as to extend to a part of the side surface of each end face force.
- a thick metal layer is formed by applying a conductive metal paste onto each end face and part of the side surface of the electronic component body and then baking the conductive metal paste.
- the process of performing is performed first.
- a conductive resin paste viscosity at a shear rate of 0. Is- 1 contains a and thermosetting resin and the conductive off Ira one thixotropic to be 200 Pa 's less, the thick layer
- the conductive resin layer is formed on the side surface by coating so that the leading edge of the thick film layer extends beyond the side with a dimension of 100 ⁇ m or more, drying, and then thermosetting. Is done.
- a step of forming a plating layer is performed by forming a conductive metal plating film on the conductive resin layer by electrical plating.
- the conductive resin paste for forming the conductive resin layer is 0.3 to 10 N / mm 2 with respect to the electronic component main body after curing. It is preferable that one having a bonding strength in a range is used.
- the leading edge of the conductive resin layer serving as the intermediate layer has a dimension of 100 zm or more and exceeds the leading edge of the thick film layer serving as the base.
- the leading edge force of the conductive resin layer is in a retracted position with a width of 50 zm or more of the leading edge force of the adhesive layer on the surface.
- the conductive resin layer is in a state of covering the electronic component main body in a region having a width of 100 ⁇ m or more beyond the leading edge of the thick film layer, and is a thick film that becomes a starting point of a crack. Stress concentration at the edge of the layer can be alleviated.
- the leading edge of the plating layer is displaced from the leading edge of the conductive resin layer with a width of 50 ⁇ m or more, and the stress concentration point that the plating layer exerts on the conductive resin layer is the tip of the conductive resin layer. It will be shifted from the edge.
- the leading edge of the conductive resin layer is against the leading edge of the plating layer where stress is concentrated during the formation of the plating layer, during transportation in the production of the multilayer ceramic capacitor, and during soldering to the terminal electrode during mounting. Since the edge is sufficiently shifted, it is possible to prevent the conductive resin layer from being undesirably peeled off by such stress.
- the conductive resin layer absorbs stress from the outside and also exceeds the allowable range from the outside, similar to those described in Patent Documents 1 and 2 described above. In any case, the conductive resin layer peels off and cracks can be prevented in the electronic component body, which can cause serious accidents such as burning and smoke generation of ceramic electronic components. Can be prevented.
- the conductive resin layer has a bonding force in the range of 0.3 to: lON / mm 2 with respect to the electronic component body, the inherent stress of the conductive resin layer The ability to fully exercise the mitigation ability S.
- the surface of the conductive resin layer is prevented from being oxidized, and the absolute amount of silver This can suppress silver migration.
- a phenol resin is used as the thermosetting resin contained in the conductive resin layer, it can have a reducing action during thermosetting, and the portion of the copper powder surface that is not coated with silver is oxidized. Can be prevented.
- a conductive resin layer is formed, so that the conductive resin having thixotropy having a viscosity at a shear rate of 0. Is- 1 of 200 Pa's or less. Since the paste is applied, it is possible to easily form a region substantially free of conductive filler at the tip of the conductive resin layer after thermosetting.
- the shear rate of 0. Is- 1 as a viscosity measurement condition corresponds to a state where almost no external force is applied to the conductive resin paste. Under this condition, the viscosity is 200 Pa ⁇ s or less. Les It can be said that the viscosity of the paste is considerably lower than the normally used paste viscosity (easy to flow).
- the conductive resin paste covers the thick film layer on the electronic component main body, and the tip of the thick film layer on the side surface.
- the conductive resin paste When applied to extend beyond the edge with a dimension of 100 xm or more, the conductive resin paste itself tends to wet and spread toward the center between the end faces of the electronic component body, but the conductive resin paste contained in the conductive resin paste Since the fillers are in contact with each other, the forces that try to join each other work and try to stay there. As a result, the conductive filler hardly moves from the initial application position, and only the solvent and the resin component dissolved in the conductive filler are wet and spread, so that the conductive filler is substantially contained at the tip of the conductive resin layer. Can result in areas that are not.
- FIG. 1 is a cross-sectional view showing a multilayer ceramic capacitor 21 according to an embodiment of the present invention
- FIG. 2 is an enlarged cross-sectional view showing a portion C of FIG.
- the multilayer ceramic capacitor 21 shown in FIGS. 1 and 2 has substantially the same structure as the multilayer ceramic capacitor 1 shown in FIG. 3, except for the structure of the terminal electrodes.
- the multilayer ceramic capacitor 21 includes an electronic component body 22 made of ceramic.
- the electronic component body 22 has two end faces 23 and 24 facing each other and a side face 25 connecting them.
- the electronic component body 22 includes a plurality of laminated dielectric ceramic layers 26 and internal electrodes 27 and 28 formed along a specific interface between the dielectric ceramic layers 26.
- the multilayer ceramic capacitor 21 is also a terminal electrode formed so as to cover each of the end faces 23 and 24 of the electronic component body 22 and to extend to a part of each of the force side faces 25 of the end faces 23 and 24. Has 29 and 30.
- the internal electrode 27 is electrically connected to one terminal electrode 29, and the internal electrode 28 is electrically connected to the other terminal electrode 30.
- the internal electrodes 27 and the internal electrodes 28 are alternately arranged in the stacking direction.
- the structure of the terminal electrodes 29 and 30 is characteristic.
- FIG. 2 a part of one terminal electrode 30 is illustrated in an enlarged manner.
- the illustrated terminal electrode 30 and the other terminal electrode 29 have substantially the same structure. Therefore, in the following, one terminal electrode 30 will be described in detail.
- terminal electrode 30 includes a thick film layer 31 having a thick film force obtained by baking conductive metal, a conductive resin layer 32 containing a thermosetting resin and a conductive filler, and a conductive film. And a plating layer 33 made of a metal plating film.
- the conductive metal constituting the thick film layer 31 is used as the conductive metal constituting the thick film layer 31.
- the thermosetting resin contained in the conductive resin layer 32 include resol type phenolic resin.
- a phenol resin such as fat is used, and as the conductive filler contained in the conductive resin layer 32, for example, silver-coated copper powder is used.
- the plating layer 33 is usually composed of a plurality of layers such as a nickel plating film and a tin plating film formed thereon.
- the thick film layer 31 is formed on part of the end surface 24 and the side surface 25 of the electronic component body 22.
- the conductive resin layer 32 is formed so as to cover the thick film layer 31 and extend on the side surface 25 beyond the leading edge 34 of the thick film layer 31 with a dimension A of 100 ⁇ or more.
- the conductive resin layer 32 directly covers the electronic component main body 22 in the dimension A portion.
- a filler-free region 35 substantially free of conductive filler is formed at the tip of the conductive resin layer 32 located on the side surface 25.
- the boundary between the non-filler-containing region 35 and the other region of the conductive resin layer 32 is shown by a clear broken line, but in reality, such a boundary appears clearly. is not.
- the plating layer 33 is formed so as to cover the conductive resin layer 32 except for a region extending along the tip edge 37 of the conductive resin layer 32 with a width of 50 ⁇ m or more. As will be described later, since the plating layer 33 is formed by electroplating, it is not formed on the filler-free region 35. Therefore, the region of the conductive resin layer 32 having a width B where the plating layer 33 is not formed. The label corresponds to the non-filler region 35.
- the multilayer ceramic capacitor 21 can be manufactured as follows.
- an electronic component body 22 manufactured through a known process is prepared.
- a conductive metal paste is prepared, and the conductive metal paste is applied to each of the end faces 23 and 24 of the electronic component body 22 and a part of the side face 25, and then baked. Thereby, the thick film layer 31 is formed.
- a conductive resin paste viscosity at a shear rate 0. ls _ 1 contains Chikaratsu thermosetting resin and a conductive filler has a thixotropy that a 200 Pa 's less Ru are prepared.
- the conductive resin paste covers the thick film layer 31 and extends beyond the front edge 34 of the thick film layer 31 with a dimension A of 100 ⁇ m or more on the side surface 25 of the electronic component body 22. Applied, dried and then heat cured. Thereby, the conductive resin layer 32 is formed.
- the applied conductive resin paste itself tends to wet and spread toward the center between the end faces 23 and 24 of the electronic component body 22.
- the conductive fillers contained in the conductive resin paste are in contact with each other, a force for bonding to each other works and tries to stay in place. Therefore, only the solvent in the conductive resin paste and the resin component dissolved in the solvent are wetted and spread. Therefore, the end portion of the conductive resin layer 32 is not filled with a filler containing substantially no conductive filler. Contained area 35 is formed.
- a plating layer 33 is formed by forming a conductive metal plating film on the conductive resin layer 32 by electrical plating.
- the plating layer 33 is not formed on the filler-free region 35.
- the width B of the filler-free region 35 where the plating layer 33 is not formed can be adjusted by changing the viscosity of the conductive resin paste applied to form the conductive resin layer 32. That is, if the viscosity of the conductive resin paste is made lower, the width B of the filler-free region 35 can be made larger. Note that, if the viscosity of the conductive resin paste is too low, it becomes difficult to form the conductive resin layer 32 with a good appearance. Therefore, the viscosity is preferably 20 Pa ′s or more.
- the plating layer 33 is formed so as to cover the conductive resin layer 32 except for the region extending with a width B of 50 ⁇ m or more along 37, that is, the filler-free region 35.
- the position 36 can be shifted with a width ⁇ of 50 ⁇ m or more from the leading edge 37 of the conductive resin layer 32. Therefore, the stress exerted by the adhesive layer 33 on the conductive resin layer 32 during the formation of the plating layer 33, during the transportation of the multilayer ceramic capacitor 21 or during soldering to the terminal electrodes 29 and 30, etc.
- Conducts leading edge 36 which is a concentrated area
- the conductive resin layer 32 can be displaced from the leading edge 37, and the conductive resin layer 32 can be prevented from inadvertently peeling before the multilayer ceramic capacitor 21 is mounted. Therefore, when the wiring board is stagnated and an external force exceeding the allowable range is applied to the multilayer ceramic capacitor 21, the conductive resin layer 32 that attempts to relieve this stress by peeling should properly exert its original stress relieving ability. Can do.
- the point where the joining force to the electronic component body 22 of the leading edge 36 and the conductive resin layer 32, which is the stress concentration point of the plating layer 33, is the weakest.
- the conductive resin layer 32 is inadvertently peeled off due to the stress exerted on the adhesive layer 33 during soldering because the tip edge 37 is too close.
- the dimension A of the conductive resin layer 32 extending beyond the leading edge 34 of the thick film layer 32 is a force that allows 100 ⁇ m or more. When this A is less than 100 zm, the stress relaxation by the conductive resin layer 32 occurs. Since the capacity is not fully demonstrated, the electronic component body 22 may crack.
- an internal electrode mainly composed of nickel was provided, and the target value of capacitance was designed to be lOOOpF.
- the length was 3.2 mm
- the width was 1.6 mm
- An electronic component body was prepared for a multilayer ceramic capacitor with a height of 1.25 mm.
- a conductive metal paste containing copper as a conductive component is applied and baked onto each end face where the internal electrode is exposed and a part of the side face adjacent to the end face where the internal electrode is exposed.
- a thick film layer serving as an electrode base was formed.
- conductive resin pastes according to the respective samples as shown in Table 1 were prepared.
- Table 1 the material of the powder that becomes the conductive filler contained in the conductive resin paste, the type of thermosetting resin contained in the conductive resin base, the viscosity of the conductive resin paste, and the conductive The bonding force exerted on the electronic component main body after the adhesive resin paste is cured is shown.
- Ag-coated Cu in the column of "conductive filler” in Table 1 indicates that the powder is silver-coated copper powder.
- phenol described in the column of “thermosetting resin” is a resol type phenol resin.
- the viscosity of the conductive resin paste was adjusted by solvent dilution. Also, each For the conductive resin paste according to the sample, the addition ratio of the thermosetting resin was adjusted so that the specific resistance would be 1 ⁇ 10 ⁇ 4 ⁇ ′cm or less after curing.
- a conductive resin paste according to each sample shown in Table 1 is applied to a predetermined region of the electronic component main body on which the thick film layer is formed, dried, and then thermally cured, whereby conductive properties are obtained.
- a functional resin layer was formed.
- a nickel plating film having a thickness of 3 ⁇ m is formed on the conductive resin layer by electroplating, and a tin plating film having a thickness of 3 / m is formed thereon, thereby forming a plating layer.
- the distance between the terminal electrodes composed of the thick film layer, the conductive resin layer, and the adhesive layer thus formed was 1.5 mm or more.
- Table 2 shows the results of measuring the dimension A and the width B shown in Fig. 2 for each sample thus obtained.
- the distance between lands is 2.2 mm
- the width dimension is 2. Omm
- the length dimension is so that the center of gravity is aligned with a glass epoxy board of length 100 mm, width 40 mm, and thickness 1.6 mm 2.
- the conductive resin layer was not peeled off after plating, after reflow soldering, and after flow soldering. ,. If the conductive resin layer itself absorbs stress, the leading edge of the conductive resin layer is displaced from the leading edge of the thick film layer with a dimension of 100 xm or more, and the leading edge of the plating layer This is considered to be because the stress concentration that is the starting point of the crack was sufficiently relaxed by shifting from the leading edge of the conductive resin layer with a dimension of 50 ⁇ m or more.
- the short-circuit failure rate is 0%. This is because when the mechanical stress due to substrate bending is applied to the sample multilayer ceramic capacitor, stress concentration occurs at the edge of the soldering layer on which the solder fillet is formed, and the stress is the same as when the plating layer is formed. Although much greater than stress or stress during soldering, such stress is effectively mitigated by delamination at the interface between the conductive resin layer and the electronic component body / plating layer. This is thought to be due to the suppression of cracks in the electronic component body.
- the present invention has been described in relation to the multilayer ceramic capacitor as an example of the multilayer ceramic electronic component.
- the present invention does not have a multilayer ceramic electronic component other than the multilayer ceramic capacitor or a multilayer structure.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Ceramic Capacitors (AREA)
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008522328A JP4998467B2 (ja) | 2006-06-28 | 2007-04-19 | セラミック電子部品およびその製造方法 |
EP07741923.2A EP2034496B1 (en) | 2006-06-28 | 2007-04-19 | Ceramic electronic component and method for manufacturing same |
CN2007800191168A CN101454852B (zh) | 2006-06-28 | 2007-04-19 | 陶瓷电子部件及其制造方法 |
KR1020087028855A KR101060796B1 (ko) | 2006-06-28 | 2007-04-19 | 세라믹 전자부품 및 그 제조방법 |
TW096119895A TWI331760B (en) | 2006-06-28 | 2007-06-04 | Ceramic electronic component and method of producing the same |
US12/261,144 US7570477B2 (en) | 2006-06-28 | 2008-10-30 | Ceramic electronic component and method for manufacturing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006177479 | 2006-06-28 | ||
JP2006-177479 | 2006-06-28 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/261,144 Continuation US7570477B2 (en) | 2006-06-28 | 2008-10-30 | Ceramic electronic component and method for manufacturing the same |
Publications (1)
Publication Number | Publication Date |
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WO2008001542A1 true WO2008001542A1 (fr) | 2008-01-03 |
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ID=38845314
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2007/058487 WO2008001542A1 (fr) | 2006-06-28 | 2007-04-19 | Composant électronique en céramique et son procédé de fabrication |
Country Status (7)
Country | Link |
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US (1) | US7570477B2 (ja) |
EP (1) | EP2034496B1 (ja) |
JP (1) | JP4998467B2 (ja) |
KR (1) | KR101060796B1 (ja) |
CN (1) | CN101454852B (ja) |
TW (1) | TWI331760B (ja) |
WO (1) | WO2008001542A1 (ja) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100157507A1 (en) * | 2008-12-24 | 2010-06-24 | Murata Manufacturing Co., Ltd. | Electronic component and producing method thereof |
JP2011018874A (ja) * | 2009-07-09 | 2011-01-27 | Samsung Electro-Mechanics Co Ltd | セラミックス電子部品 |
JP2013197186A (ja) * | 2012-03-16 | 2013-09-30 | Murata Mfg Co Ltd | セラミックコンデンサ |
JP2014093503A (ja) * | 2012-11-07 | 2014-05-19 | Murata Mfg Co Ltd | セラミック電子部品 |
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JP2014093503A (ja) * | 2012-11-07 | 2014-05-19 | Murata Mfg Co Ltd | セラミック電子部品 |
JP2014135463A (ja) * | 2013-01-09 | 2014-07-24 | Samsung Electro-Mechanics Co Ltd | 導電性樹脂組成物、これを含む積層セラミックキャパシタ及びその製造方法 |
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US10395840B1 (en) | 2018-11-16 | 2019-08-27 | Samsung Electro-Mechanics Co., Ltd. | Multilayer ceramic electronic component |
US10395839B1 (en) | 2018-11-16 | 2019-08-27 | Samsung Electro-Mechanics Co., Ltd. | Multilayer ceramic electronic component |
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US20090040688A1 (en) | 2009-02-12 |
JP4998467B2 (ja) | 2012-08-15 |
KR101060796B1 (ko) | 2011-08-30 |
CN101454852A (zh) | 2009-06-10 |
KR20080111557A (ko) | 2008-12-23 |
TW200807464A (en) | 2008-02-01 |
JPWO2008001542A1 (ja) | 2009-11-26 |
EP2034496A1 (en) | 2009-03-11 |
CN101454852B (zh) | 2011-03-23 |
EP2034496A4 (en) | 2010-12-15 |
TWI331760B (en) | 2010-10-11 |
US7570477B2 (en) | 2009-08-04 |
EP2034496B1 (en) | 2013-10-23 |
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