CN102637505A - Laminated inductor with high self-resonant frequency and high quality factor - Google Patents
Laminated inductor with high self-resonant frequency and high quality factor Download PDFInfo
- Publication number
- CN102637505A CN102637505A CN2012101333972A CN201210133397A CN102637505A CN 102637505 A CN102637505 A CN 102637505A CN 2012101333972 A CN2012101333972 A CN 2012101333972A CN 201210133397 A CN201210133397 A CN 201210133397A CN 102637505 A CN102637505 A CN 102637505A
- Authority
- CN
- China
- Prior art keywords
- insulator
- coil
- resonant frequency
- laminated
- quality factor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a laminated inductor with a high self-resonant frequency and a high quality factor. A laminated body has a structure formed by integrally laminating at least two types of insulator laminas, wherein one type of the insulator lamina is a first type insulator lamina for a ferrite magnetic material which forms upper and lower base plates of the laminated body, and the other type of the insulator lamina is a second type insulator lamina adjacent to an internal electrode of the laminated body; the main body of the laminated body comprises a plurality of first insulators made of the ferrite magnetic material and at least one layer of second insulators which are arranged in specific positions in a first insulating layer and are made of a low-dielectric-constant and low-loss material; and coil conductors of coil layers are arranged in the first insulators. The dielectric constant and loss of the integral material of the laminated inductor are reduced by adjusting the layer number and thickness of the second insulators, namely the residual capacitance is reduced, so that the self-resonant frequency (SRF) and quality (Q) value of the laminated inductor are improved; moreover, a series of laminated inductors with different SRF and Q values can be obtained by using only one type of ferrite slurry; and compared with the conventional designs of a variety of ferrite materials, the cost is greatly reduced.
Description
Technical field
The present invention relates to inductance, particularly relate to the laminated inductance of a kind of high self resonant frequency and high quality factor.
Background technology
The major parameter of laminated inductance comprises inductance value, high self resonant frequency (Self-Resonant Frequency, initialism are SRF) and the high quality factor (Quality Factor is called for short Q) that is fit to purposes.Reverse-power between the residual capacitance of inductance and the inductance coil of the SRF of inductor through coil is confirmed, improves along with the reduction of residual capacitance.Have high as far as possible self-resonant frequency inductor is worked under higher frequency, reach maximum, need reduce the residual capacitance in the inductor in order to make SRF.And the loss that the dielectric loss of the D.C. resistance of the height of Q value and winding wire, coil rack and iron core, radome etc. cause is relevant.But the method for existing laminated inductance SRF of raising and Q value is through changing the prescription of ferrite magnetic material, needing usually to prepare multiple different ferrite magnetic material, even lay in multiple ferrite slurry simultaneously, to satisfy different clients' needs.And; When in actual manufacture process, changing different materials; Need to clean such as the ball mill of preparation ferrite slurry, the ferrite slurry mixer of making the inductance base substrate and coating machine or the like equipment, it is many constant both to bring for the production schedule and production management, also waste of manpower and material resources.
Summary of the invention
Technical problem to be solved by this invention is the defective that remedies above-mentioned prior art, and the laminated inductance of a kind of high self resonant frequency and high quality factor is provided.
Technical problem of the present invention solves through following technical scheme.
The laminated inductance of this high self resonant frequency and high quality factor; Comprise that by the conductor that forms coil be internal electrode and insulator lamination and the laminated body that forms; And external terminal electrode; It is vertical two ends that said external terminal electrode is arranged on said laminated body length direction, is connected with said coil two ends respectively.
The characteristics of the laminated inductance of this high self resonant frequency and high quality factor are:
Said laminated body is that at least two types insulator stack of sheets is the structure of one; One type of first kind of insulator thin slice for the ferrite magnetic material of the upper and lower substrate of formation laminated body; Another kind of type is near second kind of insulator thin slice the internal electrode that constitutes laminated body; Its main body be ferrite magnetic material a plurality of first insulators be arranged on the inner ad-hoc location of first insulator and by second insulator of one deck at least of low-k and low-loss material; Said second insulator of one deck at least is arranged in the laminated body, makes the self-resonant frequency of laminated inductance increase, and quality factor improves.
Desired location at second kind of insulator thin slice; The conductor that is printed with metal material formation coil is an internal electrode; Be filled with second insulator of low-k and low-loss material again in the inside of internal electrode; The end of the internal electrode that on second kind of insulator thin slice, forms is connected with the internal electrode of adjacent second kind of insulator thin slice through through hole; Be laminated body be stack direction by second insulator as axial spiral coil, the coil-conductor of its coil layer is arranged in first insulator, it is the stack direction of laminated body axially promptly that the coil inside magnetic flux forms direction; Draw from an end face of laminated body at the coiling top of the spiral coil that links to each other with an extension of chip edge formation, and the coiling end of the spiral coil that links to each other with another extension of chip edge formation is drawn from the other end of laminated body.
Technical problem of the present invention solves through following further technical scheme.
Said second insulator of one deck at least comprises at the inner ad-hoc location of a plurality of first insulators:
In the inner scope of being surrounded of coil-conductor and the area scope that equals coil-conductor basically and surrounded;
Between the adjacent in twos coil-conductor layer and over against coil-conductor;
Interlayer that adjacent in twos coil-conductor is folded and area do not exceed the position at internal electrode place.
Promptly low-k and low-loss second insulator all are set in the part that all internal electrodes surrounded; Perhaps low-k and low-loss second insulator are set, to regulate the SRF and the Q value of laminated inductance in part some or that several internal electrode surrounded.
Technical problem of the present invention through following more further technical scheme in to solve.
The ferrite magnetic material of said first insulator is nickel-zinc-copper class ferrite magnetic material.
The low-k of said second insulator and low-loss material are alundum (Al, silicon dioxide, zirconium silicate, and a kind of at least two kinds of mixtures in the alundum (Al, silicon dioxide, zirconium silicate.
The dielectric constant of said second insulator be at most first insulator dielectric constant 20%.
The loss of said second insulator be at most first insulator loss 20%.
The magnetic permeability of said second insulator be first insulator magnetic permeability 20%.
Preferably, the magnetic permeability of said second insulator be at most first insulator magnetic permeability 10%, adopt less low-k and low-loss material can satisfy needed properties of product.
The coefficient of linear expansion of said second insulator and first insulator differs and is at most 10-7/ ℃.If the coefficient of linear expansion of second insulator obviously greater than the coefficient of linear expansion of first insulator, the crack possibly occur in inductance manufacturing and use.
The conductor of said formation coil is that the metal material of internal electrode is silver and is a kind of in the metal material of main component with silver.
Said high self resonant frequency is that self-resonant frequency is at least 20MHz.
Said high quality factor is to be at least 20 under the quality factor value 1MHz.
The present invention's beneficial effect compared with prior art is:
Laminated inductance of the present invention each layer by layer the main body of sheet be first insulator of ferrite magnetic material; The coil-conductor of coil layer is arranged in first insulator, is provided with second insulator of one deck low-k and low-loss material at least at the inner ad-hoc location of first insulator, through the number of plies and the thickness of regulating second insulator; Reduce the dielectric constant and the loss of laminated inductance integral material; Promptly reduce residual capacitance, and then improve the SRF and the Q value of laminated inductance, and only need a kind of ferrite slurry just can obtain the laminated inductance of a series of different SRF and Q value; With respect to the design of traditional multiple Ferrite Material, cost reduces greatly.
Description of drawings
Fig. 1 is the perspective elevation of the specific embodiment of the invention one;
Fig. 2 is the cutaway view of Fig. 1;
Fig. 3 is the exploded perspective view of the laminated body of Fig. 1;
Fig. 4 is the self-resonant frequency performance plot of the specific embodiment of the invention one;
Fig. 5 is the Q value performance plot of the specific embodiment of the invention one;
Fig. 6 is the cutaway view of the specific embodiment of the invention two;
Fig. 7 is the cutaway view of the specific embodiment of the invention three.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention will be described.
Embodiment one
A kind of high self resonant frequency and laminated inductance 100 of high quality factor shown in Fig. 1～5; Comprise that by the conductor that forms coil be the laminated body 110 that internal electrode 113 forms with the insulator lamination; And external terminal electrode 114; It is vertical two ends that external terminal electrode 114 is arranged on laminated body 110 length directions, is connected with the coil two ends respectively.
Laminated body 110 is that at least two types insulator stack of sheets is the structure of one; One type of first kind of insulator thin slice 201 for the ferrite magnetic material of the upper and lower substrate of formation laminated body 110; Another kind of type is near second kind of insulator thin slice 202 the internal electrode 113 that constitutes laminated body; Its main body is ferrite magnetic material a plurality of first insulators 111 formed and second insulator 112 of one deck at least that is arranged on first insulator, 111 inner ad-hoc locations and is made up of low-k and low-loss material; At least one deck second insulator 112 is arranged in the laminated body 110; Make the self-resonant frequency of laminated inductance increase, quality factor improves.
Desired location at second kind of insulator thin slice 202; Be printed with silver or be that the conductor that the metal material of main component forms coil is an internal electrode 113 with silver; Be filled with second insulator 112 of low-k and low-loss material again in the inside of internal electrode 113; The end of the internal electrode 113 that on second kind of insulator thin slice 202, forms is connected with the internal electrode 113 of adjacent second kind of insulator thin slice 202 through through hole; Make laminated body 110 form stack direction by second insulator 112 as axial spiral coil; Be laminated body 110 for by the stack direction of second insulator 112 as axial spiral coil; The coil-conductor of its coil layer is arranged in first insulator 111; It is the stack direction of laminated body 110 axially promptly that the coil inside magnetic flux forms direction, and draw from an end face of laminated body 110 at the coiling top of the spiral coil that links to each other with an extension 1131 of chip edge formation, and the coiling end of the spiral coil that links to each other with another extension 1131 of chip edge formation is drawn from the other end of laminated body 110.
At least one deck second insulator 112 is at the ad-hoc location of a plurality of first insulators 111 inside; Be in the scope that internal electrode 113 is surrounded; Area should equal the scope that internal electrode 113 surrounds basically; Second insulator 112 contacts with the internal electrode 113 of same layer, perhaps is slightly larger than the area that internal electrode 113 surrounds.
The ferrite magnetic material of first insulator 111 is nickel-zinc-copper class ferrite magnetic materials.
The low-k of second insulator 112 and low-loss material are alundum (Al, silicon dioxide, zirconium silicate, and a kind of at least two kinds of mixtures in the alundum (Al, silicon dioxide, zirconium silicate.
The dielectric constant of second insulator 112 be at most first insulator 111 dielectric constant 20%.
The low-loss of second insulator 112 be at most first insulator 111 loss 20%.
The magnetic permeability of second insulator 112 be first insulator 111 magnetic permeability 10%, adopt less low-k and low-loss material can satisfy needed properties of product.
The coefficient of linear expansion of second insulator 112 and first insulator 111 differs and is at most 10-7/ ℃.If the coefficient of linear expansion of second insulator 112 obviously greater than the coefficient of linear expansion of first insulator 111, the crack possibly occur in inductance manufacturing and use.
High self resonant frequency is that self-resonant frequency is at least 20MHz.
High quality factor is to be at least 20 under the quality factor value 1MHz.
The SRF characteristic of the laminated inductance 100 of this embodiment one is shown in the solid line of Fig. 4, and Q value characteristic is shown in the solid line among Fig. 5.Transverse axis among Fig. 4 and Fig. 5 is represented test frequency, and the longitudinal axis is represented inductance value and Q value respectively.Dotted line among Fig. 4 and Fig. 5 is respectively the SRF characteristic and the Q value characteristic of the common inductance of identical electrodes structure, and the laminated inductance 100 of visible this embodiment one of contrast has higher SRF and Q value.
Embodiment two
The laminated inductance 100 of a kind of high self resonant frequency and high quality factor, its structure and embodiment one are basic identical, and difference is:
At least one deck second insulator 112 is as shown in Figure 6 at the ad-hoc location of a plurality of first insulators 111 inside; Be between adjacent in twos coil-conductor layer and over against coil-conductor, promptly second insulator 112 is between two-layer internal electrode 113 and over against internal electrode 113.
Embodiment three
The laminated inductance 100 of a kind of high self resonant frequency and high quality factor, its structure and embodiment two are basic identical, and difference is:
At least one deck second insulator 112 is as shown in Figure 7 at the ad-hoc location of a plurality of first insulators 111 inside; It is the adjacent in twos folded interlayer of coil-conductor; Promptly between two-layer internal electrode 113 and area do not exceed the position at internal electrode 113 place, to reduce the problem that the coefficient of linear expansion mismatch causes between first insulator and second insulator.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.Those of ordinary skill rice for technical field under the present invention is said; Under the prerequisite that does not break away from the present invention's design, make some alternative or obvious modification that are equal to; And performance or purposes are identical, all should be regarded as belonging to the scope of patent protection that the present invention is confirmed by claims of being submitted to.
Claims (10)
1. the laminated inductance of high self resonant frequency and high quality factor; Comprise that by the conductor that forms coil be internal electrode and insulator lamination and the laminated body that forms; And external terminal electrode; It is vertical two ends that said external terminal electrode is arranged on said laminated body length direction, is connected with said coil two ends respectively, it is characterized in that:
Said laminated body is that at least two types insulator stack of sheets is the structure of one; One type of first kind of insulator thin slice for the ferrite magnetic material of the upper and lower substrate of formation laminated body; Another kind of type is near second kind of insulator thin slice the internal electrode that constitutes laminated body, and its main body is a plurality of first insulators and second insulator of one deck at least that is arranged on the inner ad-hoc location of first insulating barrier and is made up of low-k and low-loss material of ferrite magnetic material;
Desired location at second kind of insulator thin slice; The conductor that is printed with metal material formation coil is an internal electrode; Be filled with second insulator of low-k and low-loss material again in the inside of internal electrode; The end of the internal electrode that on second kind of insulator thin slice, forms is connected with the internal electrode of adjacent second kind of insulator thin slice through through hole; Be laminated body be stack direction by second insulator as axial spiral coil, the coil-conductor of its coil layer is arranged in first insulator, it is the stack direction of laminated body axially promptly that the coil inside magnetic flux forms direction; Draw from an end face of laminated body at the coiling top of the spiral coil that links to each other with an extension of chip edge formation, and the coiling end of the spiral coil that links to each other with another extension of chip edge formation is drawn from the other end of laminated body.
2. the laminated inductance of high self resonant frequency as claimed in claim 1 and high quality factor is characterized in that:
Said second insulator of one deck at least comprises at the inner ad-hoc location of a plurality of first insulators:
The scope that the interior and area of the scope of netting equals coil-conductor basically and surrounded wrap by the inner institute of coil-conductor;
Between the adjacent in twos coil-conductor layer and over against coil-conductor;
Interlayer that adjacent in twos coil-conductor is folded and area do not exceed the position at internal electrode place.
3. according to claim 1 or claim 2 high self resonant frequency and the laminated inductance of high quality factor is characterized in that:
The ferrite magnetic material of said first insulator is nickel-zinc-copper class ferrite magnetic material.
4. the laminated inductance of high self resonant frequency as claimed in claim 3 and high quality factor is characterized in that:
The low-k of said second insulator and low-loss material are alundum (Al, silicon dioxide, zirconium silicate, and a kind of at least two kinds of mixtures in the alundum (Al, silicon dioxide, zirconium silicate.
5. the laminated inductance of high self resonant frequency as claimed in claim 4 and high quality factor is characterized in that:
The dielectric constant of said second insulator be at most first insulator dielectric constant 20%.
6. the laminated inductance of high self resonant frequency as claimed in claim 5 and high quality factor is characterized in that:
The low-loss of said second insulator be at most first insulator loss 20%.
7. the laminated inductance of high self resonant frequency as claimed in claim 6 and high quality factor is characterized in that:
The low-loss of said second insulator be at most first insulator loss 20%.
8. the laminated inductance of high self resonant frequency as claimed in claim 7 and high quality factor is characterized in that:
The coefficient of linear expansion of said second insulator and first insulator differs and is at most 10-7/ ℃.
9. the laminated inductance of high self resonant frequency as claimed in claim 8 and high quality factor is characterized in that:
The conductor of said formation coil is that the metal material of internal electrode is silver and is a kind of in the metal material of main component with silver.
10. the laminated inductance of high self resonant frequency as claimed in claim 9 and high quality factor is characterized in that:
Said high self resonant frequency is that self-resonant frequency is at least 20MHz;
Said high quality factor is to be at least 20 under the quality factor value 1MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101333972A CN102637505A (en) | 2012-05-02 | 2012-05-02 | Laminated inductor with high self-resonant frequency and high quality factor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101333972A CN102637505A (en) | 2012-05-02 | 2012-05-02 | Laminated inductor with high self-resonant frequency and high quality factor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102637505A true CN102637505A (en) | 2012-08-15 |
Family
ID=46621867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101333972A Pending CN102637505A (en) | 2012-05-02 | 2012-05-02 | Laminated inductor with high self-resonant frequency and high quality factor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102637505A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013166619A1 (en) * | 2012-05-08 | 2013-11-14 | 深圳顺络电子股份有限公司 | Laminated inductor having high self-resonant frequency and high quality factor |
| CN103915243A (en) * | 2012-12-28 | 2014-07-09 | 三星电机株式会社 | Inductor |
| CN104616857A (en) * | 2013-11-05 | 2015-05-13 | 三星电机株式会社 | Laminated inductor and manufacturing method thereof |
| CN107591235A (en) * | 2016-07-06 | 2018-01-16 | 株式会社村田制作所 | Electronic unit |
| WO2020134000A1 (en) * | 2018-12-27 | 2020-07-02 | 安徽安努奇科技有限公司 | Resonant circuit and filter |
| CN114334429A (en) * | 2021-12-14 | 2022-04-12 | 华萃微感电子(江苏)有限公司 | High-strength integrally-formed micro-inductor preparation process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279819A (en) * | 1997-09-22 | 2001-01-10 | 泽夫·利普克斯 | Core and coil structure and method of making the same |
| CN1993780A (en) * | 2005-05-11 | 2007-07-04 | 松下电器产业株式会社 | Common mode noise filter |
| JP2008016619A (en) * | 2006-07-05 | 2008-01-24 | Hitachi Metals Ltd | Ferrite magnetic core and electronic component using the same |
| CN101390176A (en) * | 2006-01-31 | 2009-03-18 | 日立金属株式会社 | Laminated component and module using same |
| CN101529535A (en) * | 2006-07-05 | 2009-09-09 | 日立金属株式会社 | Laminated component |
| CN202678023U (en) * | 2012-05-02 | 2013-01-16 | 深圳顺络电子股份有限公司 | High self-resonant frequency and high quality element laminated inductor |
-
2012
- 2012-05-02 CN CN2012101333972A patent/CN102637505A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279819A (en) * | 1997-09-22 | 2001-01-10 | 泽夫·利普克斯 | Core and coil structure and method of making the same |
| CN1993780A (en) * | 2005-05-11 | 2007-07-04 | 松下电器产业株式会社 | Common mode noise filter |
| CN101390176A (en) * | 2006-01-31 | 2009-03-18 | 日立金属株式会社 | Laminated component and module using same |
| JP2008016619A (en) * | 2006-07-05 | 2008-01-24 | Hitachi Metals Ltd | Ferrite magnetic core and electronic component using the same |
| CN101529535A (en) * | 2006-07-05 | 2009-09-09 | 日立金属株式会社 | Laminated component |
| CN202678023U (en) * | 2012-05-02 | 2013-01-16 | 深圳顺络电子股份有限公司 | High self-resonant frequency and high quality element laminated inductor |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013166619A1 (en) * | 2012-05-08 | 2013-11-14 | 深圳顺络电子股份有限公司 | Laminated inductor having high self-resonant frequency and high quality factor |
| CN103915243A (en) * | 2012-12-28 | 2014-07-09 | 三星电机株式会社 | Inductor |
| CN104616857A (en) * | 2013-11-05 | 2015-05-13 | 三星电机株式会社 | Laminated inductor and manufacturing method thereof |
| CN104616857B (en) * | 2013-11-05 | 2018-10-09 | 三星电机株式会社 | Laminated inductor and its manufacturing method |
| CN107591235A (en) * | 2016-07-06 | 2018-01-16 | 株式会社村田制作所 | Electronic unit |
| CN107591235B (en) * | 2016-07-06 | 2019-11-05 | 株式会社村田制作所 | Electronic component |
| US10714254B2 (en) | 2016-07-06 | 2020-07-14 | Murata Manufacturing Co., Ltd. | Electronic component |
| WO2020134000A1 (en) * | 2018-12-27 | 2020-07-02 | 安徽安努奇科技有限公司 | Resonant circuit and filter |
| CN114334429A (en) * | 2021-12-14 | 2022-04-12 | 华萃微感电子(江苏)有限公司 | High-strength integrally-formed micro-inductor preparation process |
| CN114334429B (en) * | 2021-12-14 | 2022-11-08 | 华萃微感电子(江苏)有限公司 | High-strength integrally-formed micro-inductor preparation process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10096418B2 (en) | Laminated inductor | |
| CN102637505A (en) | Laminated inductor with high self-resonant frequency and high quality factor | |
| US8669839B2 (en) | Laminated inductor | |
| TWI648754B (en) | Interleaved transformer and method of making the same | |
| KR101994722B1 (en) | Multilayered electronic component | |
| CN102592817A (en) | Method for manufacturing stack coil device | |
| JP7257735B2 (en) | Coil component and its manufacturing method | |
| KR101843283B1 (en) | Coil Electronic Component | |
| US10269492B2 (en) | Multilayer ceramic electronic component and method of manufacturing the same | |
| KR20130031581A (en) | Laminated inductor | |
| KR20150114746A (en) | Multilayered electronic component and manufacturing method thereof | |
| CN202585541U (en) | Lamination magnetic bead with large high-frequency impedance | |
| CN202678023U (en) | High self-resonant frequency and high quality element laminated inductor | |
| TW200903537A (en) | Inductor structure | |
| KR20120031754A (en) | Multi layer power inductor and producing thereof | |
| EP2528069B1 (en) | Multi gap inductor core, multi gap inductor, transformer and corresponding manufacturing method | |
| CN102709462A (en) | Laminated magnetic bead with large high-frequency impedance | |
| US11183327B2 (en) | Coil component | |
| KR20130134868A (en) | Multilayer type inductor | |
| US20190080839A1 (en) | Coil component | |
| KR20160014936A (en) | Composite magnetic powder and chip coil component using thereof | |
| CN101728022A (en) | Method for making insulated stranded wire | |
| KR101862479B1 (en) | Laminate chip bead and method of fabricating the same | |
| JP2020145222A (en) | Laminated coil component | |
| JP2020194803A (en) | Laminated coil component |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120815 |