CN104598858B - Ultra-thin magnetic head and card reader - Google Patents
Ultra-thin magnetic head and card reader Download PDFInfo
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- CN104598858B CN104598858B CN201310534887.8A CN201310534887A CN104598858B CN 104598858 B CN104598858 B CN 104598858B CN 201310534887 A CN201310534887 A CN 201310534887A CN 104598858 B CN104598858 B CN 104598858B
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- magnetic
- component
- chip
- magnetic head
- film
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Abstract
The present invention provides a kind of ultra-thin magnetic head：Magnetic chip for induced field and exports electric signal；The sensitive surface of the first component, the magnetic chip is close to the first component, and the electrical connection corresponding with the wiring of the first component is set to of the input/output terminal of the magnetic chip；Second component, it is connected to the first component and the magnetic chip side is arranged, intensity for improving the first component, and set on the wiring of second component electrical connection corresponding with the wiring of the first component is set to, the wiring of the first component and the wiring of the second component extend the input/output terminal of the magnetic chip.The magnetic head thickness is thin, small, is suitably applied the fields such as communication, finance, traffic, security protection.The present invention also provides a kind of card reader.
Description
Technical field
The invention belongs to field of measuring technique, are specifically related to a kind of ultra-thin magnetic head and the card reader comprising the magnetic head.
Background technology
It is often used its a kind of interior magnetic card for being equipped with magnetic stripe in financial field, magnetic card is for recording customer information, personal authentication
Deng.Card reader is for reading the magnetic data being recorded on magnetic card, and in other words, card reader is recorded on magnetic card for reappearing
Magnetic information.
Magnetic head is the critical component of card reader, and the size of magnetic head directly affects the size of card reader.The thickness of existing magnetic head
Generally it is more than 5mm, that is, the thickness of existing magnetic head is thicker, causes it that can not be applied in the portable devices such as mobile phone, together
When, cause the size of the card reader using the magnetic head larger.
Invention content
The technical problem to be solved in the present invention is to be directed to drawbacks described above present in magnetic head, a kind of magnetic head and integrated is provided
Formula card reader, thickness is thin, and size is small, suitable for being applied in portable device.
For this purpose, the present invention provides a kind of magnetic head, including：
Magnetic chip for induced field and exports electric signal；
The sensitive surface of the first component, the magnetic chip is close to the first component, and the input and output of the magnetic chip
End electrical connection corresponding with the wiring of the first component is set to；
Second component is connected to the first component and the magnetic chip side is arranged, for improving the first component
Intensity, and set on the second component wiring with set on the wiring of the first component it is corresponding be electrically connected, described first
The wiring of component and the wiring of the second component extend the input/output terminal of the magnetic chip.
Wherein, further include shield member, the shield member blocks other faces of the magnetic chip in addition to sensitive surface；Institute
It includes the shield that permalloy, ferrite or silicon steel material make to state shield member；Alternatively, the shield member includes non-
The supporter that shielding material makes and the screened film set on the supporting body surface, the screened film is using permalloy, iron
Oxysome or silicon steel material make.
Wherein, on the second component and position corresponding with the magnetic chip be equipped with recess portion, the shield member
Set on the recess portion, and by the magnetic chip in the shield member.
Wherein, further include encapsulated layer, be used for the magnetic chip, the first component, second component and the shield member
Encapsulation is integral.
Wherein, the thickness of the second component is more than the thickness of the magnetic chip.
Wherein, the magnetic chip includes substrate and magnetic induction film, and the magnetic induction film is set to the surface of the substrate, described
Magnetic induction film forms Wheatstone bridge, single armed resistance or impedor.
Wherein, the magnetic chip includes 2n magnetic induction film, and every two magnetic induction films form a favour stone half-bridge, altogether
Form n favour stone half-bridge；Alternatively, the magnetic chip includes magnetic induction film described in 4m items, every four magnetic induction films are formed
One favour stone full-bridge forms m favour stone full-bridge altogether；Alternatively, the magnetic chip includes L magnetic induction film, every magnetic strength
It answers film to form a single armed resistance or impedor, forms L single armed resistance or impedor altogether；Wherein, n, m, L be >=1 it is whole
Number.
Wherein, the magnetic induction film is gmr film, giant magnetic impedance film, Hall effect film, anisotropic magnetoresistive film, tunnel effect
Answer magnetoresistive film or giant Hall effect film.
Wherein, slider pad is set on the surface of sensitive surface side of the second component far from the magnetic chip, it is described
Slider pad is connect with the wiring corresponding points of the second component, by the connecting up of the first component, the second component
The input/output terminal of the magnetic chip is extended to the second component far from the magnetic chip by wiring and the slider pad
Sensitive surface side surface.
Wherein, the thickness of the first component is 20~500 microns.
Wherein, the thickness of the first component is 60~150 microns.
Wherein, the magnetic head be applied to finance, traffic, security protection, communication field card reader.
The present invention also provides a kind of card reader, including magnetic head, the magnetic head is using described in claim 1 to 9 any one
Ultra-thin magnetic head.
The invention has the advantages that：
Magnetic head provided by the invention supports magnetic chip by the first component and second component and provides required intensity,
And extended the input/output terminal of magnetic chip by the wiring in the first component and second component, so that magnetic chip
Input/output terminal can extend to desired position, neither influence being electrically connected for magnetic head and other components in this way, and can reduce
The size of magnetic head and the thickness for reducing magnetic head, keep the thickness of magnetic head identical as the overall thickness of the first component and second component, from
And by the thickness control of magnetic head in 1.5mm or less, it might even be possible to obtain thickness and be less than the magnetic head of 1mm, and then magnetic head can be answered
For communicating, finance, traffic, the fields such as security protection, the volume of corresponding equipment can be reduced.
Description of the drawings
Fig. 1 is the sectional view of magnetic head of the embodiment of the present invention；
Fig. 2 is the sectional view of another embodiment of the present invention magnetic head；
Fig. 3 is magnetic head vertical view of the embodiment of the present invention；
Fig. 4 is the sectional view of another embodiment of the present invention magnetic head；
Fig. 5 is the functional block diagram of card reader of the embodiment of the present invention.
Specific implementation mode
To make those skilled in the art more fully understand technical scheme of the present invention, the present invention is carried below in conjunction with the accompanying drawings
The magnetic head and reader device of confession are described in detail.
As shown in Figure 1, the present embodiment magnetic head includes three magnetic chips 1, the first component 2 and second component 3.Wherein, magnetic core
Piece 1 is for induced field and exports the electric signals such as voltage signal, current signal or power signal comprising substrate, two
Magnetic induction film and three chip bonding pads, magnetic induction film and chip bonding pad are set to the surface of substrate.Two magnetic induction films formed favour this
Logical half-bridge, input/output terminal with magnetic induction film corresponding electrical connection of the chip bonding pad as magnetic chip 1.
It should be noted that magnetic chip 1 not merely includes two magnetic induction films, four magnetic strengths can also be arranged in magnetic chip 1
Film and four chip bonding pads are answered, four magnetic induction film electrical connections are obtained into favour stone full-bridge, four chip bonding pads are equally used as magnetic
The input/output terminal of chip 1.In other words, the magnetic chip 1 of the present embodiment can connect into favour stone according to the quantity of magnetic induction film
Half-bridge or favour stone full-bridge, an output channel of each Wheatstone bridge as magnetic chip 1.In another embodiment, magnetic core
Piece 1 includes a magnetic induction film and two chip bonding pads, and a magnetic induction film forms single armed resistance or impedor, two chips
Pad is set to two ends of magnetic induction film as input/output terminal.
It further illustrates, an output channel can be arranged in each magnetic chip 1, and it is logical that multiple outputs can also be arranged
Road.Each output channel can also be favour stone full-bridge or single armed resistance or impedance element either favour stone half-bridge
Part.For example, magnetic chip 1 includes 2n magnetic induction film, every two magnetic induction films form a favour stone half-bridge, formed altogether n favour this
Logical half-bridge, wherein the integer that n is >=1.Alternatively, magnetic chip 1 includes 4m magnetic induction film, every four magnetic induction films form a favour
Stone full-bridge forms m favour stone full-bridge altogether, wherein the integer that m is >=1.For another example, magnetic chip 1 includes L magnetic induction film, often
Magnetic induction film forms a single armed resistance or impedor, wherein the integer that L is >=1.Certainly, when magnetic chip 1 be arranged it is multiple defeated
When going out channel, identical structure may be used in all output channels, can also use different structure, i.e. output channel that favour can be used
It is one or more mashed up in stone half-bridge, favour stone full-bridge, single armed resistance and impedor.If magnetic chip 1 includes six magnetic
Sense film, two of which magnetic induction film form favour stone half-bridge, and in addition four magnetic induction films form favour stone full-bridge.
In short, a magnetic chip 1 can be arranged in the magnetic head of the present embodiment, multiple magnetic chips 1 can also be set.And it is each
Magnetic chip 1 may include an output channel, can also include multiple output channels.Magnetic induction film can be gmr film, giant magnetoresistance
Anti- film, Hall effect film, anisotropic magnetoresistive film, tunnel-effect magnetoresistive film or giant Hall effect film.
The first component 2 is obtained using such as resin material non-conducting material.Wiring is equipped in the first component 2（In figure not
It shows）, the wiring set on the first component 2 is therefore, to be set to the first component 2 to extend the input/output terminal of magnetic chip 1
The quantity of wiring is related to the quantity of the quantity of magnetic chip 1 and the input/output terminal of each magnetic chip 1, usually no less than magnetic core
The product of the quantity of the input/output terminal of the quantity of piece 1 and each magnetic chip 1.The sensitive surface of magnetic chip 1 is close to the first component 2,
And set on the wiring of the first component 2 electrical connection corresponding with the input/output terminal of magnetic chip 1.
The first component 2 is that magnetic chip 1 provides support, and therefore, the first component 2 should have certain intensity, but due to first
Part 2 is arranged in the sensitive surface side of magnetic chip 1, thickness directly affect between the sensitive surface and testee of magnetic chip 1 away from
From to influence the sensitivity of magnetic chip 1.Therefore, in conjunction with manufacture craft, the thickness of the present embodiment first component 2 is 20~500
Micron, preferably 60~150 microns.However, the first component of this thickness is only capable of meeting the requirement of process ruggedness, can not meet
Intensity needed for magnetic head.Therefore, the present embodiment is additionally provided with second component 3, to improve the intensity of magnetic head, it is made to meet magnetic head
Application requirement.
Second component 3 is obtained using such as resin material non-conducting material.Second component 3 is fixedly connected with the first component 2,
And second component 3 is set to the same side of the first component 2 with magnetic chip 1, and recess portion 31 is equipped on second component 3, magnetic chip 1 is embedded in
Recess portion 31.Wiring 32, quantity and the quantity of magnetic chip 1 and the input of each magnetic chip 1 are again provided in second component 3
The quantity of output end is related.Wiring 32 set on second component 3 is electrically connected with set on the wiring of the first component 2 is correspondings, by the
The wiring of one component 2 and the wiring 32 of second component 3 extend the input/output terminal of magnetic chip 1.The present embodiment is by magnetic chip 1
Input/output terminal extends to the side of the sensitive surface far from magnetic chip 1, the i.e. back side of magnetic head（The sense in the front and magnetic chip of magnetic head
Answer face consistent, the back side of magnetic head is the positive opposite another side with magnetic head）, and be electrically connected with other devices as slider pad 33
It connects.In fact, the input/output terminal of magnetic chip 1 can also extend to the side of second component 3 according to actual needs, i.e. magnetic head
Side.Alternatively, the input/output terminal of part magnetic chip 1 to be extended to the side of second component 3, by the input of remaining magnetic chip 1
Output end extends to the back side of second component 3.Why the input/output terminal of magnetic chip 1 is extended to the back side of second component 3
Or/and side, it is when being electrically connected with other components in order to avoid magnetic head, not influence the sensitivity of magnetic chip 1.
In the above-described embodiments, the thickness of second component 3 is identical as the thickness of magnetic chip 1.But the present invention is not limited to this.
The thickness of second component 3 can be less than or greater than the thickness of magnetic chip 1, as long as disclosure satisfy that the intensity of magnetic head.
In another embodiment, as shown in Figures 2 and 3, the thickness of second component 3 is more than the thickness of magnetic chip 1, and magnetic
Head further includes shield member 4, and shield member 4 blocks other faces of the magnetic chip 1 in addition to sensitive surface, with other magnetic in shielding environment
Influence of the field to magnetic chip 1, to improve sensitivity and the anti-interference ability of magnetic head.Shield member includes shield, and shield is adopted
It is made of permalloy, ferrite or silicon steel material.Another shield member 4 includes supporter and screened film, and supporter is adopted
It is made of unmasked material, screened film is made of permalloy, ferrite or silicon steel material.
Recess portion 31 is equipped on second component 3, the position of recess portion 31 is corresponding with the position of magnetic chip 1.By 1 He of magnetic chip
Shield member 4 is set to recess portion 31, and shield member 4 covers magnetic chip 1, by magnetic core using the shell of one side opening with shield member 4
Piece 1 is in shield member 4, to block other faces of the magnetic chip 1 in addition to sensitive surface.Certainly, shield member 4 can also be adopted
With other structures, as long as other faces of the magnetic chip 1 in addition to sensitive surface are blocked.
In fact, the very thin thickness of magnetic chip 1, in order to keep the due intensity of magnetic head institute, the thickness of second component 3 to be more than
The thickness of magnetic chip 1.By shield member 4 after recess portion 31 is interior, magnetic head is encapsulated using encapsulated layer, i.e., by magnetic chip 1, first
Component 2, second component 3 and shield member 4 encapsulate integrally.
As a modification of above-described embodiment, the input/output terminal of magnetic chip 1 is extended to the both sides of magnetic head.Such as Fig. 4
Shown, magnetic head further includes extension 34, and extension 34 is connected to the side of second component 3, is equipped with wiring in extension 34, extends
The wiring in portion 34 electrical connection corresponding with the wiring of second component 3.That is, slider pad 33 is set to extension 34, extension
34 further extend to the input/output terminal of magnetic chip 1 side of magnetic head.
Magnetic head provided in this embodiment supports strong needed for magnetic chip and offer by the first component and second component
Degree, and extended the input/output terminal of magnetic chip by the wiring 32 in the first component and second component, so that magnetic
The input/output terminal of chip can extend to desired position, neither influence being electrically connected for magnetic head and other components in this way, and can
To reduce the size of magnetic head and reduce the thickness of magnetic head, make the overall thickness phase of the thickness and the first component and second component of magnetic head
Together, thus by the thickness control of magnetic head in 1.5mm or less, it might even be possible to obtain the magnetic head that thickness is less than 1mm, and then can be by magnetic
Head be applied to finance, traffic, security protection, communication field card reader.
As shown in figure 5, the present embodiment also provides a kind of card reader, including magnetic head 41, processing circuit 42 and processor 43, magnetic
First 41 use ultra-thin magnetic head provided in this embodiment, and 41 induced field of magnetic head generates electric signal, and the electric signal is delivered to place
Circuit 42 is managed, processing circuit is sent to processor 43, is handled by processor after handling electric signal.
For card reader provided in this embodiment due to using ultra-thin magnetic head provided in this embodiment, size is smaller, especially thick
It spends relatively thin, the volume of card reader is reduced, so as to expand the application range of card reader.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, in the essence for not departing from the present invention
In the case of refreshing and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (12)
1. a kind of ultra-thin magnetic head, which is characterized in that including：
Magnetic chip for induced field and exports electric signal；
The first component, the sensitive surface of the magnetic chip are close to the first component, and the input/output terminal of the magnetic chip with
Wiring set on the first component corresponds to electrical connection, and the thickness of the first component is 20~500 microns；
Second component is connected to the first component and the magnetic chip side is arranged, for improving the strong of the first component
Degree, and set on the wiring of second component electrical connection corresponding with the wiring of the first component is set to, the first component
Wiring and the wiring of the second component input/output terminal of the magnetic chip is extended.
2. magnetic head according to claim 1, which is characterized in that further include shield member, the shield member is by the magnetic
It blocks in other faces of the chip in addition to sensitive surface；The shield member includes what permalloy, ferrite or silicon steel material made
Shield；Alternatively, the shield member includes the supporter that unmasked material makes and the screen set on the supporting body surface
Film is covered, the screened film is made of permalloy, ferrite or silicon steel material.
3. magnetic head according to claim 2, which is characterized in that on the second component and corresponding with the magnetic chip
Position be equipped with recess portion, the shield member is set to the recess portion, and by the magnetic chip in the shield member.
4. magnetic head according to claim 3, which is characterized in that further include encapsulated layer, for by the magnetic chip, first
Part, second component and shield member encapsulation are integral.
5. magnetic head according to claim 2, which is characterized in that the thickness of the second component is more than the thickness of the magnetic chip
Degree.
6. magnetic head according to claim 1, which is characterized in that the magnetic chip includes substrate and magnetic induction film, the magnetic
Sense film is set to the surface of the substrate, and the magnetic induction film forms Wheatstone bridge, single armed resistance or impedor.
7. magnetic head according to claim 6, which is characterized in that the magnetic chip includes 2n magnetic induction film, every two institutes
It states magnetic induction film and forms a favour stone half-bridge, form n favour stone half-bridge altogether；Alternatively, the magnetic chip includes magnetic described in 4m items
Sense film, every four magnetic induction films form a favour stone full-bridge, form m favour stone full-bridge altogether；Alternatively, the magnetic chip
Including L magnetic induction film, every magnetic induction film forms a single armed resistance or impedor, formed altogether L single armed resistance or
Impedor；Wherein, the integer that n, m, L are >=1.
8. magnetic head according to claim 6, which is characterized in that the magnetic induction film is gmr film, giant magnetic impedance film, Hall
Effect film, anisotropic magnetoresistive film, tunnel-effect magnetoresistive film or giant Hall effect film.
9. magnetic head according to claim 1, which is characterized in that in sensitive surface of the second component far from the magnetic chip
Slider pad is arranged in the surface of side, and the slider pad is connect with the wiring corresponding points of the second component, by described the
The connecting up of one component, the wiring of the second component and the slider pad extend to the input/output terminal of the magnetic chip
The surface of sensitive surface side of the second component far from the magnetic chip.
10. magnetic head according to claim 1, which is characterized in that the thickness of the first component is 60~150 microns.
11. magnetic head according to claim 1, which is characterized in that the magnetic head is applied to finance, traffic, security protection, communication neck
The card reader in domain.
12. a kind of card reader, including magnetic head, which is characterized in that the magnetic head is using described in claim 1 to 9 any one
Ultra-thin magnetic head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310534887.8A CN104598858B (en) | 2013-11-01 | 2013-11-01 | Ultra-thin magnetic head and card reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310534887.8A CN104598858B (en) | 2013-11-01 | 2013-11-01 | Ultra-thin magnetic head and card reader |
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| Publication Number | Publication Date |
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| CN104598858A CN104598858A (en) | 2015-05-06 |
| CN104598858B true CN104598858B (en) | 2018-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310534887.8A Expired - Fee Related CN104598858B (en) | 2013-11-01 | 2013-11-01 | Ultra-thin magnetic head and card reader |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104978788A (en) * | 2015-06-17 | 2015-10-14 | 深圳粤宝电子工业总公司 | Currency detector magnetic head shielding cover manufacturing method and magnetic head shielding cover |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1453858A (en) * | 2002-04-22 | 2003-11-05 | Nec化合物半导体器件株式会社 | Semiconductor device and producing method thereof |
| CN1993001A (en) * | 2005-12-27 | 2007-07-04 | 雅马哈株式会社 | Semiconductor device |
| CN102468275A (en) * | 2010-11-15 | 2012-05-23 | 瑞萨电子株式会社 | Semiconductor device and method of manufacturing semiconductor device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3725361B2 (en) * | 1999-03-18 | 2005-12-07 | 株式会社日本コンラックス | Method and apparatus for inspecting authenticity of banknotes |
| EP1795496A2 (en) * | 2005-12-08 | 2007-06-13 | Yamaha Corporation | Semiconductor device for detecting pressure variations |
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2013
- 2013-11-01 CN CN201310534887.8A patent/CN104598858B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1453858A (en) * | 2002-04-22 | 2003-11-05 | Nec化合物半导体器件株式会社 | Semiconductor device and producing method thereof |
| CN1993001A (en) * | 2005-12-27 | 2007-07-04 | 雅马哈株式会社 | Semiconductor device |
| CN102468275A (en) * | 2010-11-15 | 2012-05-23 | 瑞萨电子株式会社 | Semiconductor device and method of manufacturing semiconductor device |
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| CN104598858A (en) | 2015-05-06 |
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Granted publication date: 20180928 Termination date: 20191101 |