CN101377971A - Inner-burying type inductive element and manufacturing method thereof - Google Patents
Inner-burying type inductive element and manufacturing method thereof Download PDFInfo
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- CN101377971A CN101377971A CNA2007101481422A CN200710148142A CN101377971A CN 101377971 A CN101377971 A CN 101377971A CN A2007101481422 A CNA2007101481422 A CN A2007101481422A CN 200710148142 A CN200710148142 A CN 200710148142A CN 101377971 A CN101377971 A CN 101377971A
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- inductive element
- magnetic powder
- magnaglo
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Abstract
The invention discloses an embedded inductor and a manufacturing method thereof. The inductor comprises a coil and a magnetic body. The magnetic body is coated by the coil, and the magnetic body is composed of an insulating magnetic powder, a coupling agent and resin. The magnetic powder which is subject to surface treatment not only has the insulating effect, but can also reduce the using amount of an organic solvent and increase the bonding force with liquid resin during the follow-up resin stirring, thereby leading the liquid resin to be evenly coated on the surface of the insulating magnetic powder and ensuring the stability of induction strength and performance; and the inductor which is formed by the warm pressing or the hot pressing mode can not cause cracks. As the liquid resin is simultaneously evenly coated on the insulating magnetic powder, the output pressure during the forming is stable, the high forming pressure is unnecessary, and the service life of the mold can be prolonged.
Description
Technical field
The present invention relates to a kind of inductance element and manufacture method thereof, particularly a kind of inner-burying type inductive element and manufacture method thereof.
Background technology
Along with the electronic product fast development, basic and important parts for example inductance element are being played the part of considerable role.Therefore, how to produce colory inductance element, for desiring most ardently the target of pursuit now.For meeting microminiaturized trend, inductance element is also towards the built-in type structural development.
The manufacture method of known inner-burying type inductive element mostly is dry process, and Magnaglo is mixed with the resin dry mixing, gives hot-forming again.Because adhesive force between the two is not good, therefore in whipping process, often cause resin can't be uniformly distributed in the Magnaglo surface, when follow-up resin solidification was finished, inductance element may produce slight crack thereby influence inductance intensity and the stability of performance (for example inductance value).In addition, in the resin pressing process, need to export big briquetting pressure, and increase electric power output and minimizing die life, above-mentioned shortcoming all makes the known electric sensing unit that the demand of further improvement is arranged.
Therefore, how to provide a kind of inductance element and manufacture method thereof, magnetic material is fully mixed with resin, become one of important topic.
Summary of the invention
Because above-mentioned problem, purpose of the present invention is fully mixed with resin for a kind of magnetic material that can make is provided, and guarantees inductance intensity and stable performance, and does not need high briquetting pressure to increase the inner-burying type inductive element and the manufacture method thereof of die life.
Edge is that for reaching above-mentioned purpose, the manufacture method of foundation a kind of inner-burying type inductive element of the present invention may further comprise the steps: Magnaglo is carried out insulation processing, obtain insulated magnetic powder; This insulated magnetic powder is carried out surface treatment; To after this insulated magnetic powder after the surface treatment and the oven dry of aqueous mixed with resin, become magnetic mixture; Coil is provided; This magnetic mixture is coated this coil; And carry out pressing and curing, to form this inner-burying type inductive element.
For reaching above-mentioned purpose, comprise coil according to a kind of built-in type inductance of the present invention unit; And magnetic, coat this coil, wherein this magnetic is made up of insulated magnetic powder, couplant and resin.
From the above, a kind of inner-burying type inductive element of the present invention and manufacture method thereof are used wet process, coat at least one insulated magnetic powder by couplant, again with aqueous mixed with resin.With known art, the surface treated Magnaglo of the present invention, except that having insulation effect, when follow-up resin stirs, can reduce the consumption of organic solvent, and the bond power between increase and the aqueous resin, make the surface of the even coated insulation Magnaglo of aqueous resin, guaranteeing inductance intensity and stable performance, and the unlikely generation slight crack of inductance element by temperature and pressure or hot pressing mode institute pressing and forming.Simultaneously, because the even coated insulation Magnaglo of aqueous resin,, and can increase die life so output pressure is stable and do not need high briquetting pressure during moulding.
Description of drawings
Fig. 1 is the flow chart of manufacture method of a kind of inner-burying type inductive element of the preferred embodiment of the present invention;
Fig. 2 A and Fig. 2 B are the schematic diagram of manufacture method of the inner-burying type inductive element of Fig. 1; And
Fig. 3 is the schematic diagram of a kind of inner-burying type inductive element of the preferred embodiment of the present invention.
Description of reference numerals
21,31: coil 22: mould
23: patrix 24: the composite magnetic powder
32: magnetic 33: terminal
S01～S06: the process step of the manufacture method of inner-burying type inductive element
Embodiment
Hereinafter with reference to relevant indicators, a kind of inner-burying type inductive element and manufacture method thereof according to the preferred embodiment of the present invention are described, wherein components identical will be illustrated with identical reference marks.
Please refer to shown in Figure 1ly, the manufacture method of a kind of inner-burying type inductive element of the preferred embodiment of the present invention comprises that step S01 is to step S06.Step S01 obtains at least one insulated magnetic powder at least one Magnaglo is carried out insulation processing.The material of Magnaglo is such as but not limited to iron, cobalt, nickel or its alloy, and wherein the average grain diameter of Magnaglo is about 1-100 micron (micron, μ m).Insulation processing is that inorganic material is such as but not limited to phosphate compounds or ceramic material by an inorganic material coated magnetic powder, and ceramic material is such as but not limited to aluminium oxide or zinc oxide.
Step S02 is for to carry out surface treatment with insulated magnetic powder, and wherein surface treatment is for passing through couplant coated insulation Magnaglo, and the addition of couplant is the 0.5%-6% of Magnaglo weight.Couplant fully is mixed into mixed liquor A with organic solvent (as acetone) earlier, insulated magnetic powder is incorporated in this mixed liquor A evenly to stir again, and is dried again.
This couplant is such as but not limited to surface modifier or interfacial agent, surface modifier for example is organosilan, titanium system, aluminium system or zirconium system, and interfacial agent for example is perfluoroalkyl system (perfluoroalkyl) or DDAO (lauryldimethylamine oxide).
Step S03 be will be after surface treatment insulated magnetic powder and aqueous mixed with resin, the addition of aqueous resin is the 1%-6% of Magnaglo weight.Aqueous resin fully is mixed into mixed liquid B with organic solvent (as acetone) earlier, more surface-treated insulated magnetic powder is incorporated in this mixed liquid B evenly to stir, and is dried to obtain mixture again.In addition, further comprising the steps of after step S03: that this mixture and lubricant are mixed into the composite magnetic powder.The addition of lubricant is the 0.05%-1% of this Magnaglo weight, and lubricant for example is stearic acid, cured or graphite.Aqueous resin is a thermosetting resin.
Please refer to shown in Fig. 1 and Fig. 2 A, step S04 is for providing coil 21.Coil 21 is placed in the mould 22.
Please refer to shown in Fig. 1 and Fig. 2 B, step S05 is for to fill in this above-mentioned composite magnetic powder in the mould 22, to coat coil 21.Step S06 promptly finishes the making of inner-burying type inductive element for also solidifying with curing or hot pressing mode behind the temperature and pressure by patrix 23.In addition, also can earlier this composite magnetic powder be pressed into earlier in advance the magnetic of EE or EI type, coil be placed in this magnetic again, be pressed into inner-burying type inductive element at last.
As shown in Figure 3, a kind of inner-burying type inductive element of the preferred embodiment of the present invention comprises coil 31, two terminals 33 and magnetics 32.These terminals 33 weld or link two ends of coil 31 respectively, and magnetic 32 coats coil 31 and these terminals 33 are exposed, and magnetic 32 is made up of insulated magnetic powder, couplant and resin.Because inner-burying type inductive element and manufacture method thereof are specified in, so repeat no more.In addition, the two ends of this coil 31 also can directly be extended for outside this magnetic, with as terminal.
In sum, a kind of inner-burying type inductive element of the present invention and manufacture method thereof are used wet process, Coat at least one insulated magnetic powder by couplant, again with aqueous mixed with resin. With known art, The surface treated Magnaglo of the present invention, except having insulation effect, when follow-up resin agitating, Can reduce the consumption of organic solvent, and the bond power between increase and the aqueous resin, make aqueous resin even Inductance intensity and stable performance can be guaranteed in the surface of coated insulation Magnaglo, and by temperature and pressure or hot pressing The unlikely generation slight crack of inductance element of mode institute pressing and forming. Simultaneously, the even coated insulation magnetic of aqueous resin The property powder, so during moulding output pressure stable with do not need high briquetting pressure, use the longevity and can increase mould Life.
The above only is illustrative, but not is restricted person. Any spirit of the present invention and model of not breaking away from The farmland, and to its equivalent modifications of carrying out or change, all should be contained in the appended claim.
Claims (26)
1, a kind of manufacture method of inner-burying type inductive element, it may further comprise the steps:
Magnaglo is carried out insulation processing, obtain insulated magnetic powder;
This insulated magnetic powder is carried out surface treatment;
This insulated magnetic powder and aqueous mixed with resin resulting mixture that will be after surface treatment;
Coil is provided;
This mixture is coated this coil; And
Carry out pressing and curing, to form this inner-burying type inductive element.
2, manufacture method as claimed in claim 1, wherein this insulation processing step coats this Magnaglo by inorganic material.
3, manufacture method as claimed in claim 2, wherein this Magnaglo comprises iron, cobalt, nickel or its alloy; This inorganic material is aluminium oxide, zinc oxide, phosphate compounds or ceramic material.
4, manufacture method as claimed in claim 1, wherein this surface treatment step coats this insulated magnetic powder by couplant.
5, manufacture method as claimed in claim 4, wherein the addition of this couplant is 0.5%～6% of this Magnaglo weight.
6, manufacture method as claimed in claim 4, its also comprise a step with this couplant with after organic solvent mixes, add this insulated magnetic powder again and stirred and dry.
7, manufacture method as claimed in claim 4, wherein this couplant is organosilan, titanium system, aluminium system, zirconium system, perfluoroalkyl system, DDAO, surface modifier or interfacial agent.
8, manufacture method as claimed in claim 1, wherein the addition of this aqueous resin is 1%～6% of this Magnaglo weight.
9, manufacture method as claimed in claim 1, wherein this aqueous resin is a thermosetting resin.
10, manufacture method as claimed in claim 1, its also comprise a step should be aqueous resin mixes with organic solvent earlier, again with should surface-treated insulated magnetic powder adding stirring and dry.
11, manufacture method as claimed in claim 1 wherein should coat after the step of this coil, and was further comprising the steps of:
Dry this this insulated magnetic powder after surface treatment and the mixture of this aqueous resin; And
Add mix lubricant and stir, to form the composite magnetic powder.
12, manufacture method as claimed in claim 11, wherein the addition of this lubricant is the 0.05%-1% of this Magnaglo weight.
13, manufacture method as claimed in claim 11, wherein this lubricant is stearic acid, cured or graphite.
14, manufacture method as claimed in claim 1, wherein this mixture is coated also comprise that a step is pressed into the magnetic of a given shape earlier in advance with this mixture before this coil step after, again this coil is coated in this magnetic.
15, manufacture method as claimed in claim 1, wherein this pressing step is hot pressing or temperature and pressure mode.
16, a kind of inner-burying type inductive element comprises:
Coil; And
Magnetic coats this coil, and wherein this magnetic is made up of insulated magnetic powder, couplant and resin.
17, inner-burying type inductive element as claimed in claim 16, wherein this insulated magnetic powder is that inorganic material coats at least one Magnaglo.
18, inner-burying type inductive element as claimed in claim 17, wherein this Magnaglo comprises iron, cobalt, nickel or its alloy; This inorganic material is aluminium oxide, zinc oxide, phosphate compounds or ceramic material.
19, inner-burying type inductive element as claimed in claim 17, wherein the average grain diameter of this Magnaglo is 1～100 micron.
20, inner-burying type inductive element as claimed in claim 17, wherein the addition of this couplant is 0.5%～6% of this Magnaglo weight, the addition of this resin is 1%～6% of this Magnaglo weight.
21, inner-burying type inductive element as claimed in claim 17, wherein this magnetic also comprises lubricant.
22, inner-burying type inductive element as claimed in claim 21, wherein the addition of this lubricant is 0.05%～1% of this Magnaglo weight.
23, inner-burying type inductive element as claimed in claim 21, wherein this lubricant is stearic acid, cured or graphite.
24, inner-burying type inductive element as claimed in claim 16, wherein this couplant is organosilan, titanium system, aluminium system, zirconium system, perfluoroalkyl system, DDAO, surface modifier or interfacial agent.
25, inner-burying type inductive element as claimed in claim 16, wherein the two ends of this coil extend outside this magnetic, with as terminal.
26, inner-burying type inductive element as claimed in claim 16, it also comprises two terminals, is linked to the two ends of this coil respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101481422A CN101377971A (en) | 2007-08-28 | 2007-08-28 | Inner-burying type inductive element and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101481422A CN101377971A (en) | 2007-08-28 | 2007-08-28 | Inner-burying type inductive element and manufacturing method thereof |
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| CN101377971A true CN101377971A (en) | 2009-03-04 |
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| CNA2007101481422A Pending CN101377971A (en) | 2007-08-28 | 2007-08-28 | Inner-burying type inductive element and manufacturing method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637506A (en) * | 2012-03-20 | 2012-08-15 | 苏州达方电子有限公司 | Miniature inductance component and method for manufacturing same |
| CN104036907A (en) * | 2014-06-05 | 2014-09-10 | 浙江大学 | Method for preparing soft magnetic metal composite via warm compaction |
| CN105575644A (en) * | 2014-11-07 | 2016-05-11 | 昆山玛冀电子有限公司 | Fabrication method for inductor free of welding point |
| CN109545505A (en) * | 2018-11-29 | 2019-03-29 | 深圳顺络电子股份有限公司 | A kind of high reliability inductance and preparation method thereof |
| CN110277212A (en) * | 2019-07-03 | 2019-09-24 | 贝尔(深圳)新材料有限公司 | A kind of preparation method of high magnetic conductivity cream |
-
2007
- 2007-08-28 CN CNA2007101481422A patent/CN101377971A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637506A (en) * | 2012-03-20 | 2012-08-15 | 苏州达方电子有限公司 | Miniature inductance component and method for manufacturing same |
| CN102637506B (en) * | 2012-03-20 | 2014-03-12 | 苏州达方电子有限公司 | Miniature inductance component and method for manufacturing same |
| CN104036907A (en) * | 2014-06-05 | 2014-09-10 | 浙江大学 | Method for preparing soft magnetic metal composite via warm compaction |
| CN105575644A (en) * | 2014-11-07 | 2016-05-11 | 昆山玛冀电子有限公司 | Fabrication method for inductor free of welding point |
| CN109545505A (en) * | 2018-11-29 | 2019-03-29 | 深圳顺络电子股份有限公司 | A kind of high reliability inductance and preparation method thereof |
| CN110277212A (en) * | 2019-07-03 | 2019-09-24 | 贝尔(深圳)新材料有限公司 | A kind of preparation method of high magnetic conductivity cream |
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Open date: 20090304 |