WO2018008699A1 - コイル用部品およびインダクタ - Google Patents
コイル用部品およびインダクタ Download PDFInfo
- Publication number
- WO2018008699A1 WO2018008699A1 PCT/JP2017/024706 JP2017024706W WO2018008699A1 WO 2018008699 A1 WO2018008699 A1 WO 2018008699A1 JP 2017024706 W JP2017024706 W JP 2017024706W WO 2018008699 A1 WO2018008699 A1 WO 2018008699A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coil component
- core
- inductor
- leg
- leg portion
- Prior art date
Links
- 239000000843 powder Substances 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- 229910000679 solder Inorganic materials 0.000 description 9
- 239000000919 ceramic Substances 0.000 description 8
- 239000004020 conductor Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000010949 copper Substances 0.000 description 7
- 239000010931 gold Substances 0.000 description 7
- 238000005304 joining Methods 0.000 description 7
- 239000011701 zinc Substances 0.000 description 7
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910000480 nickel oxide Inorganic materials 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical group [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical group [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
- 239000000347 magnesium hydroxide Substances 0.000 description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/045—Fixed inductances of the signal type with magnetic core with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
- H01F27/292—Surface mounted devices
-
- 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
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
Definitions
- This disclosure relates to a coil component and an inductor.
- a variety of electronic devices such as capacitors, chip resistors, and inductors are mounted on various electronic devices. As portable electronic devices are further miniaturized, these electronic components are also being miniaturized.
- an electrode of the electronic component is bonded to an electrode of a mounting body such as a printed wiring board. For example, solder or the like is used for joining to the mounting body.
- Patent Document 1 discloses an example of an inductor.
- the inductor includes a core for winding a conducting wire, and a coil component having a leg portion at each end of the core.
- the inductor in Patent Document 1 is configured by winding a conducting wire around the core of the coil component.
- the coil component of the present disclosure is a coil component including a core and a plurality of legs provided at each end of the core, and each of the legs includes the core and the legs. It has a protrusion that protrudes inward from the joint.
- the inductor according to the present disclosure includes the coil component, a conductive wire wound around a core, and an electrode layer on each of the leg portions.
- FIG. 6 is a perspective view of one embodiment of an inductor. It is a fragmentary sectional view of one embodiment of an inductor. It is a fragmentary sectional view of one embodiment of an inductor. It is a fragmentary sectional view showing an example of a mounting state of one embodiment of an inductor.
- FIG. 6 is a perspective view of another embodiment of an inductor.
- FIG. 6 is a partial cross-sectional view of another embodiment of an inductor.
- FIG. 6 is a partial cross-sectional view of another embodiment of an inductor. It is a fragmentary sectional view showing an example of a mounting state of other one embodiment of an inductor.
- FIG. 1 shows an embodiment of an inductor.
- A is a perspective view
- (b) is an enlarged sectional view of a part of the left leg in FIG. 1 (a)
- (c) is a part of the left leg in FIG. 1 (a). It is expanded sectional drawing.
- FIG. 2 is an enlarged cross-sectional view of a main part in a state where the inductor shown in FIG. 1 is mounted.
- the coil component 10 constituting the inductor 1 shown in FIG. 1 includes a core 12 and a plurality of leg portions (in this embodiment, a leg portion 13a and a leg portion 13b) provided at each end of the core 12.
- the leg portion 13a has a protruding portion 30a that protrudes inward from the joint portion 19a between the core 12 and the leg portion 13a.
- the leg part 13b has the protrusion part 30b which protruded inside rather than the junction part 19b of the core 12 and the leg part 13b.
- the coil component 10 shown in FIG. 1 is a so-called drum core-shaped member.
- the inductor 1 includes a conducting wire 2 wound around a core 12, an electrode layer 18a provided on the end face 16a, and an electrode layer 18b provided on the end face 16b.
- the leg portion 13a has a protruding portion 30a that protrudes from the vertical line of the joint portion 19a between the core 12 and the leg portion 13a.
- the leg part 13b has the protrusion part 30b which protruded from the perpendicular line of the junction part 19b of the core 12 and the leg part 13b.
- the main component is described as the coil component 10 except for the description of the whole image and the bonding with the mounted body.
- the leg portion 13a has an inner side surface 14a
- the leg portion 13b has an inner side surface 14b
- the inner side surface 14a and the inner side surface 14b are opposed to each other.
- the leg portion 13a has an outer surface 15a opposite to the inner side surface 14a
- the leg portion 13b has an outer side surface 15b opposite to the inner side surface 14b.
- the inner side surface 14a has an inclined surface 11a in a region corresponding to the protruding portion 30a
- the inner side surface 14b has an inclined surface 11b in a region corresponding to the protruding portion 30b.
- the leg portion 13a has an end surface 16a corresponding to the lower surface in the drawing.
- the end surface 16a is connected to the protrusion 30a.
- the leg portion 13b has an end surface 16b corresponding to the lower surface in the drawing.
- the end surface 16b is connected to the protrusion 30b.
- An electrode layer 18a made of, for example, a plating layer is provided on the end face 16a.
- An electrode layer 18b made of, for example, a plating layer is provided on the end face 16b.
- the end surface 16 a and the end surface 16 b are each parallel to the length direction of the core 12.
- the vertical line of the joint portion 19a between the core 12 and the leg portion 13a is orthogonal to the end face 16a.
- the vertical line of the joint portion 19b between the core 12 and the leg portion 13b is orthogonal to the end face 16b.
- the joint portion 19a is a portion where the inner side surface 14a and the core portion 12 abut
- the joint portion 19b is a portion where the inner side surface 14b and the core portion 12 abut.
- the length of the core 12 corresponds to the length between the joint portion 19a and the joint portion 19b.
- the inclined surface 11a is inclined in a direction approaching the end surface 16b of the leg portion 13b as it approaches the end surface 16a from the core 12.
- the inclined surface 11b is inclined in a direction approaching the end surface 16a of the leg portion 13a as it approaches the end surface 16b from the core 12. Therefore, in the coil component 10, the length X2 between the end surface 16a and the end surface 16b is smaller than the length of the core 12 indicated by X1 in FIG.
- the coil component 10 has, for example, a length along the direction from the leg portion 13a to the leg portion 13b of about 0.4 mm, and a length along the direction from the end surface 16a to the surface opposite to the end surface 16a (high This is a so-called 0402 size electronic component having a thickness of about 0.2 mm.
- the size and shape of the coil component 10 are not particularly limited, and may be an electronic component having a so-called 0603 (length 0.6 mm ⁇ height 0.3 mm) size, and the shape is not limited to a drum core shape.
- FIG. 2 is an enlarged cross-sectional view of a main part in the mounted state of the inductor shown in FIG.
- the inductor 1 is mounted on a mounted body 22 such as a printed wiring board.
- the inductor 1 is bonded to a conductor layer 24 such as an electrode pad mainly composed of gold (Au) provided on the surface of the mounted body 22 via a bonding member 20 such as solder.
- a conductor layer 24 such as an electrode pad mainly composed of gold (Au) provided on the surface of the mounted body 22 via a bonding member 20 such as solder.
- Au gold
- the electrode layer 18a of the leg portion 13a is joined to the conductor layer 24 of the mounted body 22 via a joining member 20 such as solder.
- a joining member 20 such as solder.
- reflowed molten metal such as solder is likely to spread over the entire electrode layer 18a having relatively good wettability.
- the joining member 20 may be electrically connected to the conductive wire 2 located in the core 12 to reduce the inductor function.
- the leg part 13a has the inclined surface 11a in the area
- the leg portion 13a has a protruding portion 30a, and the cross-sectional area of the leg portion 13a is relatively large in the protruding portion 30a.
- the area of the end surface 16a of the leg portion 13a is also relatively large, and consequently the area of the electrode layer 18a is relatively large.
- the bonding area between the electrode layer 18a and the conductor layer 24 of the mounted body 22 is relatively large, and the bonding strength between the inductor 1 and the mounted body 22 is relatively high.
- the electrode layer 18a has an inner end line 81a located on the inner side surface 14a of the leg 13a and an outer end line 82a located on the outer side surface 15a.
- the distance from the end surface 16a to the inner end line 81a may be smaller than the distance from the end surface 16a to the outer end line 82a. In this case, it is possible to ensure a large bonding area between the electrode layer 18a and the bonding member 20 in the end line 82a farther from the conducting wire 2 without lowering the inductor function, and to relatively increase the bonding strength. Excellent reliability.
- the angle ⁇ formed between the end surface 16a of the leg portion 13a and the inclined surface 11a shown in FIG. 1B and the end surface 16b and the inclined surface 11b of the leg portion 13b shown in FIG. May be 70 ° or more and 80 ° or less.
- wetting of molten metal such as reflowed solder can be suppressed.
- stress concentration around the joint 19a and the joint 19b can be reduced.
- the angle ⁇ and the angle ⁇ may be measured using an observation image obtained by observing a cross section as shown in FIGS. Specifically, an angle between a virtual line along the end surface 16a and a virtual line along the inclined surface 11a may be measured.
- the three-dimensional shape of the coil component 10 is measured, and the virtual line along the inclined surface 11a and the end surface 16a are measured from the measured three-dimensional shape data. What is necessary is just to measure the angle between virtual lines.
- the intersecting portion 17a between the inclined surface 11a and the end surface 16a may be a curved surface.
- the creeping distance from the end surface 16a to the end line 81a is increased, so that the bonding strength is increased.
- the concentration of the electric field in the leg part 13a can be relieved by having the intersection part 17a.
- the radius of curvature of the intersecting portion 17a is, for example, about 0.025 mm or less.
- the stress is relatively easily concentrated at the intersecting portion 17a between the inclined surface 11a and the end surface 16a in the joined state.
- the intersecting portion 17a is a curved surface, the concentration of stress applied to the intersecting portion 17a is alleviated, and mechanical damage and destruction of the coil component 10 are suppressed.
- the core 12, the leg 13a, and the leg 13b are made of, for example, ceramics mainly composed of aluminum oxide or ferrite.
- the main component in ceramics refers to a component occupying 70% by mass or more of 100% by mass of components constituting the ceramic, and particularly preferably 80% by mass or more.
- Identification of the components (crystal structure) constituting the ceramic may be performed using an X-ray diffractometer. Also, the content can be obtained by calculating the content of the metal element using an ICP (Inductively-Coupled-Plasma) emission spectrometer or fluorescent X-ray analyzer and converting it to an oxide based on the identified crystal structure. That's fine.
- ICP Inductively-Coupled-Plasma
- FIG. 3 shows another embodiment of the inductor.
- (A) is a perspective view
- (b) is an enlarged sectional view of a part of the left leg in FIG. 3 (a)
- (c) is a part of the right leg in FIG. 3 (a).
- FIG. 4 is an enlarged cross-sectional view of a main part in the mounted state of the inductor shown in FIG. 3 and 4, the same configurations as those in FIGS. 1 and 2 are denoted by the same reference numerals as those in FIGS. 1 and 2.
- the main component will be described as the coil component 10 ′ except for the entire image and the bonding with the mounted body.
- the coil component 10 ′ shown in FIG. 3 is generally rounded in the protrusion 30a ′ at the leg 13a ′ and the protrusion 30b ′ at the leg 13b ′.
- the difference is that it has a protruding shape.
- the leg portion 13a ' has a protruding portion 30a' that protrudes inward from the joint portion 19a 'between the core 12 and the leg portion 13a'.
- the leg portion 13b ' has a protruding portion 30b' that protrudes inward from the joint portion 19b 'between the core 12 and the leg portion 13b'.
- the protrusion 30 a ′ has a convex curved surface 31 a
- the protrusion 30 b ′ has a convex curved surface 31 b.
- FIG. 4 is an enlarged cross-sectional view of the main part in the mounted state of the inductor 1 ′ shown in FIG. 3.
- the inductor 1 ′ is made of solder or the like on the conductor layer 24 such as an electrode pad mainly composed of gold (Au) provided on the mounted body 22 such as a printed wiring board. It is used by being joined via the joining member 20.
- the inductor 1 ′ is bonded to a conductor layer 24 such as an electrode pad mainly composed of gold (Au) provided on the surface of the mounted body 22 via a bonding member 20 such as solder.
- a conductor layer 24 such as an electrode pad mainly composed of gold (Au) provided on the surface of the mounted body 22 via a bonding member 20 such as solder.
- Au gold
- FIG. 4 only the leg portion 13 a ′ is selectively shown, but the leg portion 13 b ′ side has the same configuration.
- the leg portion 13a 'side will be described as a representative.
- the electrode layer 18a of the leg portion 13a ' is joined to the conductor layer 24 of the mounted body 22 via a joining member 20 such as solder. In this joining process, for example, reflowed molten metal such as solder is likely to spread over the entire electrode layer 18a having relatively good wettability.
- the leg portion 13a 'of the coil component 10' has a convex curved surface 31a, and the rise of the molten metal during bonding is more reliably suppressed, so that the inductor function is less likely to be deteriorated.
- the coil component 10 ' is a portion corresponding to the convex curved surface 31a, and the cross-sectional area of the leg portion 13a' is larger.
- the area of the end face 16a of the leg portion 13a ' is also larger, and consequently the area of the electrode layer 18a is larger. Therefore, the bonding area between the electrode layer 18a and the conductor layer 24 of the mounted body 22 is increased, and the bonding strength between the inductor 1 'and the mounted body 22 is increased.
- the convex curved surface 31 a may be connected to the end surface 16 a. Since the coil component 10 ′ has the convex curved surface 31 a, the creeping distance from the end surface 16 a to the end line 81 a is relatively long and the bonding strength is relatively high. In addition, when the convex curved surface 31a is a rounded curved surface as a whole, there are relatively few portions where the electric field tends to concentrate, such as edge portions and protrusions, so that the concentration of the electric field at the leg portion 13a 'is reduced. Has been. Similarly, when the convex curved surface 31a is a rounded curved surface as a whole, there are few portions where stress is easily concentrated, and mechanical damage and destruction of the coil component 10 'can be suppressed.
- Al 2 O 3 aluminum oxide
- SiO 2 silicon oxide
- CaCO 3 calcium carbonate
- Mg (OH) 2 magnesium hydroxide
- a binder such as PVA (polyvinyl alcohol) and 100 parts by mass of a solvent with respect to 100 parts by mass of the total of aluminum oxide powder, silicon oxide powder, calcium carbonate powder and magnesium hydroxide powder And 0.1 to 0.55 parts by mass of a dispersant are mixed to obtain a slurry.
- a binder such as PVA (polyvinyl alcohol)
- a solvent with respect to 100 parts by mass of the total of aluminum oxide powder, silicon oxide powder, calcium carbonate powder and magnesium hydroxide powder
- 0.1 to 0.55 parts by mass of a dispersant are mixed to obtain a slurry.
- the slurry is spray-dried to obtain granules, and the obtained granules are filled in a mold and molded into a predetermined shape by a dry pressure molding method or the like.
- the obtained molded body is held at a firing temperature of 1450 to 1750 ° C. for 2 to 5 hours. Through these steps, a coil component made of ceramics mainly composed of aluminum oxide can be obtained.
- Fe, Zn, Ni and Cu oxides or carbonates, nitrates and the like that generate Fe, Zn, Ni and Cu oxides by firing (hereinafter referred to as Fe source powder, Zn source powder, Ni source powder, Cu source)
- Fe source powder, Zn source powder, Ni source powder, Cu source) Each powder of a metal salt is also prepared.
- the average particle size for example, when Fe is iron oxide (Fe 2 O 3 ), Zn is zinc oxide (ZnO), Ni is nickel oxide (NiO), and Cu is copper oxide (CuO), 0.5 ⁇ m each.
- the thickness is preferably 5 ⁇ m or less.
- Fe, Zn the composition range in a total of 100 mole% of Ni and Cu in terms oxides, Fe 49.5 mol% in terms of Fe 2 O 3, Zn 30.5 mol% calculated as ZnO
- Ni is 12.5 mol% in terms of NiO and Cu is 7.5 mol% in terms of CuO
- Fe source powder, Zn source powder, Ni source powder and Cu source powder have the above composition among the starting materials. And weigh and mix using a ball mill or the like.
- a calcined body is obtained by calcining in the atmosphere at a temperature of 700 to 1000 ° C.
- the calcined body is put into a ball mill etc. together with water and pulverized and mixed. Thereafter, a predetermined amount of binder or the like is added to form a slurry. Next, it is spray dried to obtain granules. Then, the obtained granule is filled in a mold, and a molded body having a predetermined shape is obtained by a dry pressure molding method or the like. Thereafter, the molded body is degreased in a degreasing furnace at a temperature of 400 to 800 ° C. to obtain a degreased body, and then the degreased body is held at a firing temperature of 1000 to 1200 ° C. for 2 to 5 hours. Through such steps, a coil component made of ceramics whose main component is ferrite can be obtained.
- a base layer is formed on the end surface of the leg portion of the coil component obtained by the above-described method.
- the underlayer may be formed, for example, by applying a paste containing molybdenum as a main component and containing manganese and heat-treating at 1400 ° C. in a reducing atmosphere.
- an electrode layer is formed on the surface of the underlayer.
- the electrode layer may be formed, for example, by barrel plating.
- An electrode layer has nickel, gold
- an inductor can be obtained by winding a conducting wire around the core.
- Coil parts are handled in batches, for example, in manufacturing processes such as barrel plating, inspection processes after manufacturing, and transport of finished products.
- the container body is transported in a state in which a large number of coil components 10 are collectively put in a transport container body.
- the plurality of coil components 10 collide with each other in a random posture.
- the core 12 and the leg portion 13a of the other coil component 10 are likely to enter between the leg portion 13a and the leg portion 13b of the coil component 10, and between the leg portion 13a and the leg portion 13b.
- another coil member 10 may be caught.
- the leg portion 13a has the protruding portion 30a
- the leg portion 13b has the protruding portion 30b, so that the length between the leg portion 13a and the leg portion 13b is long. Is relatively small. For this reason, it is difficult for the cores 12 and leg portions 13a of other coil components 10 to enter between the leg portions 13a and the leg portions 13b of one coil component 10.
- the pinching of the other coil components 10 is suppressed. For example, a large amount of labor that occurs during transportation and defects due to pinching are suppressed.
- Inductor 2 Conductor 10: Coil parts 11a, 11b: Inclined surface 12: Core 13a, 13b: Leg part 14a, 14b: Inner side surface 15a, 15b: Outer surface 16a, 16b: End surface 18a, 18b: Electrode layer 17a 17b: Intersections 30a, 30b: Protrusions 31a, 31b: Convex curved surfaces
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
2 :導線
10 :コイル用部品
11a、11b :傾斜面
12 :コア
13a、13b :脚部
14a、14b :内側面
15a、15b :外側面
16a、16b :端面
18a、18b :電極層
17a、17b :交わり部
30a、30b :突出部
31a、31b :凸曲面
Claims (7)
- コアと、
該コアの端部それぞれに設けられた複数の脚部とを備えるコイル用部品であって、
それぞれの前記脚部は、前記コアと前記脚部との接合部よりも内側に突出した突出部を有するコイル用部品。 - 前記突出部が傾斜面を有する請求項1に記載のコイル用部品。
- 前記脚部の端面と前記傾斜面とのなす角度が70°以上80°以下である請求項2に記載のコイル用部品。
- 前記傾斜面と前記端面との交わり部が曲面である請求項2または請求項3に記載のコイル用部品。
- 前記突出部が凸曲面を有する請求項1に記載のコイル用部品。
- 前記凸曲面が前記端面と繋がっている請求項5に記載のコイル用部品。
- 請求項1乃至請求項6のいずれか1つに記載のコイル用部品と、
前記コアに巻回された導線と、
前記脚部のそれぞれに電極層とを備えるインダクタ。
Priority Applications (4)
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JP2018526424A JP6665293B2 (ja) | 2016-07-05 | 2017-07-05 | コイル用部品およびインダクタ |
US16/315,628 US11309118B2 (en) | 2016-07-05 | 2017-07-05 | Coil component and inductor |
KR1020197000261A KR102109490B1 (ko) | 2016-07-05 | 2017-07-05 | 코일용 부품 및 인덕터 |
CN201780041448.XA CN109416971B (zh) | 2016-07-05 | 2017-07-05 | 线圈用部件以及电感器 |
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US (1) | US11309118B2 (ja) |
JP (1) | JP6665293B2 (ja) |
KR (1) | KR102109490B1 (ja) |
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Cited By (1)
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US11848134B2 (en) | 2019-12-06 | 2023-12-19 | Murata Manufacturing Co., Ltd. | Wire-wound core, coil component, and method of manufacturing coil component |
Families Citing this family (8)
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JP6669123B2 (ja) * | 2017-04-19 | 2020-03-18 | 株式会社村田製作所 | インダクタ |
JP6720914B2 (ja) * | 2017-04-25 | 2020-07-08 | 株式会社村田製作所 | インダクタ |
JP6708162B2 (ja) * | 2017-04-25 | 2020-06-10 | 株式会社村田製作所 | インダクタ |
JP6769386B2 (ja) * | 2017-04-25 | 2020-10-14 | 株式会社村田製作所 | インダクタ |
JP6828673B2 (ja) * | 2017-12-15 | 2021-02-10 | 株式会社村田製作所 | 積層型インダクタ部品及び積層型インダクタ部品の製造方法 |
USD918835S1 (en) * | 2018-08-22 | 2021-05-11 | Tdk Corporation | Coil component |
JP1638080S (ja) * | 2018-08-22 | 2019-08-05 | ||
US20220108820A1 (en) * | 2020-10-07 | 2022-04-07 | Murata Manufacturing Co., Ltd. | Ferrite sintered body and wire-wound coil component |
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JP2002033228A (ja) * | 2000-07-17 | 2002-01-31 | Murata Mfg Co Ltd | チップ型コモンモードチョークコイル |
JP2005317591A (ja) * | 2004-04-27 | 2005-11-10 | Kyocera Corp | セラミックコアおよびその製造方法、ならびにこれを用いたチップ状電子部品 |
JP2016063195A (ja) * | 2014-09-22 | 2016-04-25 | 株式会社村田製作所 | コイル部品およびその実装構造 |
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JPH07302714A (ja) | 1994-05-09 | 1995-11-14 | Murata Mfg Co Ltd | コイル |
JP3091142B2 (ja) | 1996-10-31 | 2000-09-25 | 京セラ株式会社 | 角型チップインダクタ |
JP3960977B2 (ja) * | 2003-02-17 | 2007-08-15 | 株式会社フォノン明和 | コモンモードコイル |
CN2906862Y (zh) * | 2006-01-20 | 2007-05-30 | 耀钻科技股份有限公司 | 可增加安装效率的电感器结构 |
CN105489344B (zh) * | 2016-01-26 | 2018-01-12 | 深圳顺络电子股份有限公司 | 脉冲变压器及其制造方法 |
JP6565747B2 (ja) * | 2016-03-11 | 2019-08-28 | Tdk株式会社 | コイル装置 |
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JP2002033228A (ja) * | 2000-07-17 | 2002-01-31 | Murata Mfg Co Ltd | チップ型コモンモードチョークコイル |
JP2005317591A (ja) * | 2004-04-27 | 2005-11-10 | Kyocera Corp | セラミックコアおよびその製造方法、ならびにこれを用いたチップ状電子部品 |
JP2016063195A (ja) * | 2014-09-22 | 2016-04-25 | 株式会社村田製作所 | コイル部品およびその実装構造 |
Cited By (1)
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US11848134B2 (en) | 2019-12-06 | 2023-12-19 | Murata Manufacturing Co., Ltd. | Wire-wound core, coil component, and method of manufacturing coil component |
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JP6665293B2 (ja) | 2020-03-13 |
KR20190014078A (ko) | 2019-02-11 |
US11309118B2 (en) | 2022-04-19 |
JPWO2018008699A1 (ja) | 2019-04-25 |
US20190318863A1 (en) | 2019-10-17 |
CN109416971A (zh) | 2019-03-01 |
KR102109490B1 (ko) | 2020-05-12 |
CN109416971B (zh) | 2021-02-19 |
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