CN108045063A - A kind of preparation method of wireless charging electromagnetic shielding piece - Google Patents
A kind of preparation method of wireless charging electromagnetic shielding piece Download PDFInfo
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- CN108045063A CN108045063A CN201711063756.0A CN201711063756A CN108045063A CN 108045063 A CN108045063 A CN 108045063A CN 201711063756 A CN201711063756 A CN 201711063756A CN 108045063 A CN108045063 A CN 108045063A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/212—Electromagnetic interference shielding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fluid Mechanics (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The present invention provides a kind of preparation method of wireless charging with electromagnetic shielding piece, and the preparation method includes at least：1) soft magnetic materials magnetic sheet is provided, the soft magnetic materials magnetic sheet is wound；2) the soft magnetic materials magnetic sheet after winding is heat-treated；3) single-side coating is carried out to the soft magnetic materials magnetic sheet after being heat-treated；4) processing is patterned on one side using what roll-to-roll technique did not covered the soft magnetic materials magnetic sheet glue；5) surface for being patterned processing is carried out covering glue；6) step 5) cover to the surface of graphical treatment of the surface bonding of glue to another soft magnetic materials magnetic sheet, laminating operation is integrally carried out to it again after the number of plies needed for being stacked to, another soft magnetic materials magnetic sheet is obtained after the step 1) to step 4).The present invention is patterned processing by the roll-to-roll pressing of rubber roller, and figure is made more to homogenize, and improves the stability of magnetic sheet.
Description
Technical field
The present invention relates to wireless charging field, more particularly to a kind of wireless charging preparation method of electromagnetic shielding piece.
Background technology
Wireless charging technology (Wireless charging technology), comes from wireless power conveying technology.Wirelessly
Charge, also referred to as induction charging, non-contact inductive charge, sensed using near field, that is, inductive coupling, by power supply unit
(charger) transmits its energy to the device of electricity consumption, which charges to battery using the energy received, and supplies it simultaneously
Body running is used.Due to, with inductive coupling transmission energy, not run wires between the two between charger and power device, because
This charger and the device of electricity consumption can accomplish that no conductive junction point is exposed.
At present, part smart mobile phone starts that wireless charging technology, such as Nokia is supported newly to issue in the market
Lumia mobile phones.And the estimated next-generation apple iPhone of many people also can be using wireless charging technology as the master of new version
Want one of feature.Although however, can realize wireless charging at present, as new technology, there is presently no a unifications for it
Standard.Numerous companies all are attempting to carry out the wireless charging technology of oneself, such as with big shots such as Nokia, Texas Instrument, LG
For the Qi international wireless charging alliances that represent as the electromagnetic induction wireless charging technology of representative and with Intel etc. for representative
Resonate wireless charging technology, also has a kind of electromagnetic wave wireless charging.Just introduce the respective spy of these three technologies respectively below
Point：
Electromagnetic induction：Qi international wireless rechargeable standards are used with this technology, and basic principle is to send and receive end
A coil is all set, end-coil is sent and is connected with line power supply, and generates electromagnetic signal, end-coil comment is received and believes to this electromagnetism
Number, so as to which transfer point leaves device battery charging for.The shortcomings that electromagnetic induction technology is exactly shorter using distance, with the increasing of distance
Add, electric energy loss can become very big.
Electromagnetic wave：Electromagnetic wave has many uses, and except transmitting broadcast, TV signal, he can also transmit electric energy in fact.It is former
Reason is that microwave is converted into electric energy by Rectenna, and efficiency of passing on a message can reach 95%.Likewise, radio wave mesh
Preceding technology still can not realize effectively transmission over long distances, and when electromagnetic wave energy is concentrated, charging efficiency just can guarantee.
Resonant interaction：Can be with high efficiency of transmission energy between the identical object of two vibration frequencies, here it is the volumes that resonance is
Wireless energy transfer acts on.Such as using two copper coils as resonator, transmitting terminal is vibrated with 10MHz frequencies, can around dissipated
Go out electromagnetic field, and receiving terminal needs equally to vibrate with 10MHz frequencies, can just receive this energy passed over, connects a line
Circle forms " energy channel " almost closed.The scope of this non-radiating electromagnetic field than relatively limited, at present also can only compared with
It uses in short distance, is not suitable for long distance transmission electric energy, but can be in the range effect apart from several meters of power supply.
Generally speaking, wireless charging technology is not also overripened at present, and charge efficiency is low.In order to obtain higher charging effect
Rate is general to be reduced using electromagnetic shielding piece or eliminated influence of the electromagnetic field to power device.
The content of the invention
In view of the foregoing deficiencies of prior art, it is an object of the invention to provide a kind of wireless charging electromagnetic shieldings
The preparation method of piece, for solving the problems, such as that wireless charging efficiency is low in the prior art.
In order to achieve the above objects and other related objects, the present invention provides a kind of preparation of wireless charging with electromagnetic shielding piece
Method, the preparation method include at least：
1) soft magnetic materials magnetic sheet is provided, the soft magnetic materials magnetic sheet is wound；
2) the soft magnetic materials magnetic sheet after winding is heat-treated；
3) single-side coating is carried out to the soft magnetic materials magnetic sheet after being heat-treated；
4) processing is patterned on one side using what roll-to-roll technique did not covered the soft magnetic materials magnetic sheet glue；
5) surface for being patterned processing is carried out covering glue；
6) step 5) cover to the table of graphical treatment of the surface bonding of glue to another soft magnetic materials magnetic sheet
Face integrally carries out laminating operation to it again after being stacked to the required number of plies, and another soft magnetic materials magnetic sheet is by the step
It is rapid 1) to be obtained afterwards to step 4).
As a kind of wireless charging of the present invention scheme of optimization of the preparation method of electromagnetic shielding piece, the soft magnetic materials
Magnetic sheet is amorphous or nano crystal soft magnetic material band.
As a kind of wireless charging of the present invention scheme of optimization of the preparation method of electromagnetic shielding piece, the soft magnetic materials
The ingredient of magnetic sheet is made of at least one of Fe, Co, Ni, Zr, Hf, Si, B, P metal and at least one nonmetalloid.
As a kind of wireless charging of the present invention scheme of optimization of the preparation method of electromagnetic shielding piece, the soft magnetic materials
The thickness range of magnetic sheet is 5~50 μm.
As a kind of wireless charging of the present invention scheme of optimization of the preparation method of electromagnetic shielding piece, the step 2)
In, it is that the step of amorphous soft magnetic material band is heat-treated includes to the soft magnetic materials magnetic sheet：First it is warming up to 350~380
DEG C, heat preservation then proceedes to be warming up to 400~500 DEG C, then keep the temperature, wherein the heating-up time for 1~3 it is small when, soaking time for 1~
10 it is small when.
As a kind of wireless charging of the present invention scheme of optimization of the preparation method of electromagnetic shielding piece, the step 2)
In, it is that the step of nano crystal soft magnetic material band is heat-treated includes to the soft magnetic materials magnetic sheet：First it is warming up to 300~
450 DEG C, heat preservation then proceedes to be warming up to 450~510 DEG C, and heat preservation is then continued to be warming up to 510~580 DEG C, then kept the temperature, wherein
When heating-up time is 1~3 small, when soaking time is 1~10 small.
As a kind of wireless charging of the present invention scheme of optimization of the preparation method of electromagnetic shielding piece, step 2) is being carried out
While middle heat treatment, carry out plus transverse magnetic plus vertical magnetic field, putting english magnetic field or is not added with magnetic field processing.
As a kind of wireless charging of the present invention scheme of optimization of the preparation method of electromagnetic shielding piece, the step 3)
In, single-side coating is carried out to the soft magnetic materials magnetic sheet after being heat-treated using the roll-to-roll adhesive process that covers.
As a kind of wireless charging of the present invention scheme of optimization of the preparation method of electromagnetic shielding piece, in the step 4)
Being patterned treated, pattern area is 0.1~10mm2, pattern interval is 0.1~50 μm.
As a kind of wireless charging of the present invention scheme of optimization of the preparation method of electromagnetic shielding piece, the step 6)
In, further include step after carrying out laminating operation：
It will carry out the structure obtained after the laminating operation to be punched out according to size requirement, obtain the lamination of desired size
Magnetic sheet；
The lamination magnetic sheet with ferrite magnetic sheet, graphite flake and coil is bonded, obtains electromagnetic shielding piece.
As described above, the wireless charging of the present invention preparation method of electromagnetic shielding piece, has the advantages that：
1st, using the amorphous with the excellent soft magnetic characteristic such as low-loss, high magnetic permeability, nanocrystalline strip as soft magnetic materials
Magnetic sheet can effectively reduce the energy loss during wireless charging, reduce fever and the electromagnetic interference to ambient enviroment.
2nd, heat treatment step of the present invention by suitable heat treatment parameter, can improve high frequency performance and stabilization
Property, improve charge efficiency.
3rd, the present invention is patterned processing by roll-to-roll technique, can reach the purpose to the Homogenization Treatments of figure,
Improve the stability of magnetic sheet.
Description of the drawings
Fig. 1 is the process flow diagram for the preparation method that wireless charging of the present invention is electromagnetically shielded piece.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
Refer to attached drawing.It should be noted that the diagram provided in the present embodiment only illustrates the present invention in a schematic way
Basic conception, only the display component related with the present invention rather than component count, shape during according to actual implementation in schema then
Shape and size are drawn, and kenel, quantity and the ratio of each component can be a kind of random change during actual implementation, and its component cloth
Office's kenel may also be increasingly complex.
The present invention provides a kind of preparation method of wireless charging with electromagnetic shielding piece, as shown in Figure 1, the preparation method is extremely
Include the following steps less：
Step S1 is first carried out, soft magnetic materials magnetic sheet is provided, the soft magnetic materials magnetic sheet is wound.
As an example, the soft magnetic materials magnetic sheet is preferably selected as amorphous or nano crystal soft magnetic material band, such as iron-based
Amorphous 1K101 series band, iron based nano crystal 1K107 series band, the Ni-based amorphous nanocrystalline strip of iron, Ni-based amorphous, cobalt-based
Amorphous band etc., main component is by least one of Fe, Co, Ni, Zr, Hf, Si, B, P metal and at least nonmetalloid
Composition.Using the amorphous with the excellent soft magnetic characteristic such as low-loss, high magnetic permeability, nanocrystalline strip as soft magnetic materials magnetic sheet,
The energy loss during wireless charging can be effectively reduced, reduces fever and the electromagnetic interference to ambient enviroment.
As an example, the thickness range of the soft magnetic materials magnetic sheet is 5~50 μm.For example, it may be 5 μm, 8 μm, 10 μm,
12 μm, 15 μm, 18 μm, 20 μm, 25 μm, 30 μm, 40 μm, 50 μm etc..Soft magnetic materials magnetic sheet thickness of the present invention surpasses
Thin and controllable, radio-frequency region is wide, uniformity and stability are good, is made by single roller or double-roller rapid quenching method.
After being wound, the soft magnetic materials magnetic sheet is wound into the annular core with certain specification size.
Then step S2 is performed, the soft magnetic materials magnetic sheet after winding is heat-treated.
The soft magnetic materials magnetic sheet of winding is heat-treated according to certain regularly arranged be placed in heat-treatment furnace.
Specifically, for amorphous soft magnetic material magnetic sheet, the step of being heat-treated, includes：350~380 DEG C are first warming up to,
Heat preservation, then proceedes to be warming up to 400~500 DEG C, then keeps the temperature, and when wherein the heating-up time is 1~3 small, soaking time is small for 1~10
When.For example, first heating up 1 hour to 360 DEG C, when heat preservation 3 is small at 360 DEG C, heating 1 hour to 450 DEG C is then proceeded to, 450
When heat preservation 3 is small at DEG C, then cool down.
For nano crystal soft magnetic material magnetic sheet, the step of being heat-treated, includes：300~450 DEG C are first warming up to, is kept the temperature,
It then proceedes to be warming up to 450~510 DEG C, heat preservation is then continued to be warming up to 510~580 DEG C, then kept the temperature, and the wherein heating-up time is 1
~3 it is small when, soaking time for 1~10 it is small when.For example, first heat up 1 hour to 350 DEG C, when heat preservation 2 is small at 350 DEG C, Ran Houji
Temperature of continuing rising 1 hour to 500 DEG C, when heat preservation 3 is small at 500 DEG C；Heating 3 hours to 550 DEG C is then continued to, 4 are kept the temperature at 550 DEG C
Hour.
As an example, while being heat-treated, can according to band kind (such as Fe-based amorphous, the Ni-based amorphous of iron,
Iron based nano crystal is cobalt base amorphous etc.) it carries out plus transverse magnetic plus vertical magnetic field, putting english magnetic field or is not added with magnetic field processing.Pass through magnetic
Field processing can increase the shielding properties of magnetic material, after magnetic field is added to handle, saturation magnetostriction constant be reduced, so as to reduce
The influence of stress, improves magnetic conductivity, reduces loss, improves charge efficiency.
Then step S3 is carried out, single-side coating is carried out to the soft magnetic materials magnetic sheet after being heat-treated.
Specifically, the roll-to-roll adhesive process that covers can be used to carry out covering glue.Since the soft magnetic materials magnetic sheet (band) carries out
It is very crisp after heat treatment, it needs to ensure that bubble-free generates between one side glue and band during single-side coating, so just can guarantee volume
Production to volume, the present invention takes reduces the bubble between one side glue and band with mold is fixed-type, for example, step S2 is first
Band and mold (plastic sleeve mold or iron core die) are put into togerther in heat-treatment furnace and be heat-treated, ensures band
Then prototype uses mold by band stretching on laminating machine, so in this step, it is possible to reduce the gap between band,
So as to reduce the bubble between one side glue and band.
The glue-line carried out in this step used in single-side coating can be double faced adhesive tape, not be limited herein.
Then step S4 is performed, being patterned on one side for glue is not covered to the soft magnetic materials magnetic sheet using roll-to-roll technique
Processing
The roll-to-roll technique is patterned processing, mainly includes：It is patterned before processing, can first treat
The surface of graphical treatment increases very thin PET protection film, so as not to disk roller contact directly the surface of the soft magnetic materials magnetic sheet and
Breakage, processing procedure mainly carry out figure by the spacing of two disk rollers of direct weighting and control to the soft magnetic materials magnetic sheet
Change is handled, also can be by the pattern formed of replacing the disk roller of different pattern to adjust on the soft magnetic materials magnetic sheet surface.
Different paper sizes corresponds to the electromagnetic performance of different frequent points, has been drawn by largely testing the present inventor one
Determine under frequency, the best correspondence of corresponding electromagnetic performance and figure.Since the microstructure and shape on magnetic sheet surface are to rear
The eddy-current loss of continuous magnetic sheet when charging and charge efficiency it is of great impact.The present inventor is by controlling the shape of particle in magnetic sheet
Shape, size, the size in gap, it is possible to the eddy-current loss of magnetic sheet when directly controlling charging, and then improve charge efficiency.Simultaneously originally
Inventor has found that influence of the different patterns to magnetic sheet electromagnetic performance is different, and the pattern high frequency performance that pattern is uniform, tiny is good, whirlpool
Stream loss is low, while magnetic conductivity slightly reduces；And the magnetic sheet that pattern is coarse, high frequency performance are poor, eddy-current loss is higher, and magnetic
Conductance is higher；And final charge efficiency and the height of magnetic conductivity, the size of eddy-current loss have relation, so, theoretically need
The balance of magnetic conductivity and eddy-current loss is wanted, i.e. the pattern form of graphical treatment, size need to just can guarantee in certain scope
The optimal performance of magnetic sheet makes its charge efficiency highest.
Graphical treatment adds the effect and speed of crazing processing, it is easier to the degree of crazing is controlled, so as to
To control the magnetic conductivity of material, by controlling the spacing of crackle, change the size of fine debris, so as to control the big of eddy-current loss
It is small, the fever in charging process is reduced, improves charge efficiency.
As an example, the pattern of graphical treatment can be regular pattern, such as square, rectangle, circle, triangle
Shape, star-like etc. or irregular pattern.
As an example, being patterned that treated, pattern area is 0.1~10mm2, pattern interval is 0.1~50 μm.
For example, the pattern area can be 0.8mm2、1mm2、2mm2、5mm2、8mm2、10mm2Etc., pattern interval can be 5 μm, 8
μm, 10 μm, 15 μm, 25 μm etc..The pattern area is the area of single pattern.
List the performance parameter corresponding to different pattern areas under equal pressure in table 1, under low frequency (200K), figure
Case area is bigger, and inductance Ls and resistance Rs are bigger, and magnetic conductivity is also bigger, but high frequency (13.56MHz) situation be it is opposite,
Pattern area is bigger, and inductance Ls and resistance Rs are smaller, and magnetic conductivity is also smaller.
Table 1
| Pattern area (mm2) | Ls(200K)uh | Rs(200K)mΩ | Ls(13.56MHz)uh |
| 2 | 7.8 | 130 | 2.1 |
| 1 | 7.5 | 60 | 2.3 |
| 0.8 | 7.3 | 20 | 2.4 |
The graphical treatment of the present invention is carried out by the roll-to-roll pressing of rubber roller, can reach the Homogenization Treatments to figure
Purpose, improve the stability of the soft magnetic materials magnetic sheet.
Existing market is mostly graphical treatment mode of the piece to piece, and I is taken charge of at present using automation one the most advanced
Body machine can realize roll-to-roll graphics process, substantially increase production efficiency and the uniformity of product.Pass through graphical treatment
Roll-to-roll production can also improve follow-up roll-to-roll fitting production efficiency, must further improve efficiency, reduce cost.
Step S5 is performed again, and the surface for being patterned processing is carried out covering glue.
The glue-line for cover used in glue to the surface for being patterned processing in this step can be double faced adhesive tape, herein
It is not limited.
Step S6 is finally performed, the step S5 cover the surface bonding of glue to the figure of another soft magnetic materials magnetic sheet
The surface of shapeization processing integrally carries out laminating operation, another soft magnetic materials magnetic sheet to it again after being stacked to the required number of plies
It is obtained after the step S1 to step S4.
This step further includes step after carrying out laminating operation：
The structure obtained after the laminating operation will first be carried out to be punched out according to size requirement, obtain the folded of desired size
Layer magnetic sheet；The lamination magnetic sheet with ferrite magnetic sheet, graphite flake and coil is bonded again, obtains electromagnetic shielding piece.Institute
The positional structure of ferrite magnetic sheet, graphite flake and coil fitting is stated as conventional structure, not reinflated narration herein.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of wireless charging preparation method of electromagnetic shielding piece, which is characterized in that the preparation method includes at least：
1) soft magnetic materials magnetic sheet is provided, the soft magnetic materials magnetic sheet is wound；
2) the soft magnetic materials magnetic sheet after winding is heat-treated；
3) single-side coating is carried out to the soft magnetic materials magnetic sheet after being heat-treated；
4) processing is patterned on one side using what roll-to-roll technique did not covered the soft magnetic materials magnetic sheet glue；
5) surface for being patterned processing is carried out covering glue；
6) step 5) cover to the surface of graphical treatment of the surface bonding of glue to another soft magnetic materials magnetic sheet, is folded
Layer to integrally carrying out laminating operation after the required number of plies to it again, another soft magnetic materials magnetic sheet be by the step 1) extremely
Step 4) is obtained afterwards.
2. the wireless charging according to claim 1 preparation method of electromagnetic shielding piece, it is characterised in that：The soft magnetism material
It is amorphous or nano crystal soft magnetic material band to expect magnetic sheet.
3. the wireless charging according to claim 1 preparation method of electromagnetic shielding piece, it is characterised in that：The soft magnetism material
Expect that the ingredient of magnetic sheet is made of at least one of Fe, Co, Ni, Zr, Hf, Si, B, P metal and at least one nonmetalloid.
4. the wireless charging according to claim 1 preparation method of electromagnetic shielding piece, it is characterised in that：The soft magnetism material
The thickness range for expecting magnetic sheet is 5~50 μm.
5. the wireless charging according to claim 2 preparation method of electromagnetic shielding piece, it is characterised in that：The step 2)
In, it is that the step of amorphous soft magnetic material band is heat-treated includes to the soft magnetic materials magnetic sheet：First it is warming up to 350~380
DEG C, heat preservation then proceedes to be warming up to 400~500 DEG C, then keep the temperature, wherein the heating-up time for 1~3 it is small when, soaking time for 1~
10 it is small when.
6. the wireless charging according to claim 2 preparation method of electromagnetic shielding piece, it is characterised in that：The step 2)
In, it is that the step of nano crystal soft magnetic material band is heat-treated includes to the soft magnetic materials magnetic sheet：First it is warming up to 300~
450 DEG C, heat preservation then proceedes to be warming up to 450~510 DEG C, and heat preservation is then continued to be warming up to 510~580 DEG C, then kept the temperature, wherein
When heating-up time is 1~3 small, when soaking time is 1~10 small.
7. the wireless charging according to claim 1 preparation method of electromagnetic shielding piece, it is characterised in that：Progress described in
In step 2) while heat treatment, carry out plus transverse magnetic plus vertical magnetic field, putting english magnetic field or is not added with magnetic field processing.
8. the wireless charging according to claim 1 preparation method of electromagnetic shielding piece, it is characterised in that：The step 3)
In, single-side coating is carried out to the soft magnetic materials magnetic sheet after being heat-treated using the roll-to-roll adhesive process that covers.
9. the wireless charging according to claim 1 preparation method of electromagnetic shielding piece, it is characterised in that：The step 4)
In be patterned that treated pattern area be 0.1~10mm2, pattern interval is 0.1~50 μm.
10. the wireless charging according to claim 1 preparation method of electromagnetic shielding piece, it is characterised in that：The step
6) in, step is further included after carrying out laminating operation：
It will carry out the structure obtained after the laminating operation to be punched out according to size requirement, obtain the lamination magnetic of desired size
Piece；
The lamination magnetic sheet with ferrite magnetic sheet, graphite flake and coil is bonded, obtains electromagnetic shielding piece.
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| CN201711063756.0A CN108045063A (en) | 2017-11-02 | 2017-11-02 | A kind of preparation method of wireless charging electromagnetic shielding piece |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107431387A (en) * | 2015-06-25 | 2017-12-01 | Lg伊诺特有限公司 | Wireless power reception device and the wireless power induction system for including it |
| CN108597849A (en) * | 2018-06-13 | 2018-09-28 | 蓝沛光线（上海）电子科技有限公司 | A kind of low-loss antifreeze plate preparation process and antifreeze plate |
| CN109109426A (en) * | 2018-06-27 | 2019-01-01 | 横店集团东磁股份有限公司 | A kind of surface treatment method of the nanocrystalline shielding piece of wireless charging |
| CN109545535A (en) * | 2018-10-18 | 2019-03-29 | 上海万兹新材料科技有限公司 | A kind of preparation method of the magnetic screen piece on wireless charging and NFC |
| CN112467824A (en) * | 2020-11-02 | 2021-03-09 | 信维通信（江苏）有限公司 | Wireless charging shielding sheet and preparation method thereof, wireless charging module and magnetic crushing equipment |
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| CN104011814A (en) * | 2011-12-21 | 2014-08-27 | 阿莫先恩电子电器有限公司 | Magnetic field shielding sheet for a wireless charger, method for manufacturing same, and receiving apparatus for a wireless charger using the sheet |
| CN105027355A (en) * | 2013-03-05 | 2015-11-04 | 阿莫先恩电子电器有限公司 | Composite sheet for shielding magnetic field and electromagnetic wave, and antenna module comprising same |
| CN105336465A (en) * | 2015-10-27 | 2016-02-17 | 安泰科技股份有限公司 | Compound magnetic conductive plate used for wireless charging and near field communication and preparation method thereof |
| CN106912188A (en) * | 2015-12-22 | 2017-06-30 | 上海光线新材料科技有限公司 | A kind of wireless charging preparation method and electromagnetic shielding piece for being electromagnetically shielded piece |
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