CN108990406A - Ultra-thin electromagnetic shields piece and the electronic equipment using it - Google Patents
Ultra-thin electromagnetic shields piece and the electronic equipment using it Download PDFInfo
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- CN108990406A CN108990406A CN201811135597.5A CN201811135597A CN108990406A CN 108990406 A CN108990406 A CN 108990406A CN 201811135597 A CN201811135597 A CN 201811135597A CN 108990406 A CN108990406 A CN 108990406A
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- 239000010410 layer Substances 0.000 claims abstract description 122
- 239000012790 adhesive layer Substances 0.000 claims abstract description 97
- 239000012634 fragment Substances 0.000 claims abstract description 54
- 239000011241 protective layer Substances 0.000 claims abstract description 36
- 230000000873 masking effect Effects 0.000 claims abstract description 26
- 239000011230 binding agent Substances 0.000 claims abstract description 19
- 238000003892 spreading Methods 0.000 claims abstract description 3
- 230000007480 spreading Effects 0.000 claims abstract description 3
- 239000000758 substrate Substances 0.000 claims description 21
- 239000000853 adhesive Substances 0.000 claims description 16
- 230000001070 adhesive effect Effects 0.000 claims description 16
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 9
- 239000003292 glue Substances 0.000 claims description 7
- 229910000889 permalloy Inorganic materials 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 5
- 229910000859 α-Fe Inorganic materials 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 239000006247 magnetic powder Substances 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000013467 fragmentation Methods 0.000 description 5
- 238000006062 fragmentation reaction Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 208000037656 Respiratory Sounds Diseases 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000003475 lamination Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- -1 which is Substances 0.000 description 1
Classifications
-
- 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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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
This application discloses a kind of ultra-thin electromagnetic shielding piece and using its electronic equipment; it includes protective layer, magnetic masking layer, layers of two-sided that the ultra-thin electromagnetic, which shields piece; and release film layer, the magnetic masking layer spread out and put on the first magnetic piece debris layer being embedded in the first adhesive layer of protective layer and discontinuous the second magnetic piece debris layer being embedded in the second adhesive layer of layers of two-sided of spreading out and putting on is constituted by discontinuous on protective layer direction；Filled with the binder in the first adhesive layer between the first magnetic piece fragment, filled with the binder in the second adhesive layer between the second magnetic piece fragment.Integrality not harsh requirement of the ultra-thin electromagnetic shielding piece disclosed in the present application to band, can be achieved the ultrathin of electromagnetic shielding piece under conditions of meeting electromagnetic shielding.
Description
Technical field
It is set this application involves technical field of electronic products more particularly to a kind of ultra-thin electromagnetic shielding piece and using its electronics
It is standby.
Background technique
With the development of economy and society, the type for appearing in electronic product in our daily lifes is more and more.While this
A little electronic products generally use high frequency, digitlization and integrated etc. towards miniaturization, multifunction, intelligent direction development
Key technology.The progress and use of these technologies greatly facilitate people's lives and work, but also bring simultaneously negative
Influence: will appear serious electromagnetic interference problem between electronic equipment, excessive electromagnetic radiation can cause shadow to human health
It rings.Therefore each electronic product manufacturer can control the external amount of electromagnetic radiation of product, while also need the anti-electromagnetism for improving product dry
The ability disturbed thus is needed using electromagnetic shielding piece.
Fast-developing wireless charging technology in recent years, should be able to achieve higher wireless charging efficiency, and cannot interfere
The normal work of electronic product internal electronic component.To achieve the goals above, it is also required to electromagnetic shielding piece equally to conduct
The alternating magnetic field generated by the transmitting terminal of wireless charging, and heating problem caused by the eddy current effect due to itself can be overcome.
Existing electromagnetic shielding chip technology 1: a kind of composite magnetic body is disclosed: by soft magnetic metal phase and between soft magnetism
Insulation between metal phase is mutually constituted.It in more detail, is by containing flat soft magnetic metal powder and in the metal powder surface shape
At insulating film Magnaglo crimping engagement and formed.
Existing electromagnetic shielding chip technology 2: a kind of magnetic field shielding piece is disclosed: at least one layer of thin plate magnetic piece, by dividing
It is formed from the amorphous band for multiple shreds, protective film, the one side of above-mentioned thin plate magnetic piece is bonded in by the first adhesive layer, with
And double faced adhesive tape, the second adhesive layer by being set to one side are bonded in the another side of above-mentioned thin plate magnetic piece；It is above-mentioned multiple
Gap between shred is filled by a part of above-mentioned first adhesive layer and the second adhesive layer, so that above-mentioned multiple shred insulation.
In more detail, be by the amorphous band after heat treatment through adhesive tape gluing (at least one layer), carry out fragmentation processing, using
Planarization and slimming are to form above structure.
Existing electromagnetic shielding chip technology 3: disclosing a kind of wireless charging single/multiple layer magnetic conduction sheet: one layer of magnetic flakes,
A plurality of crackle is evenly distributed on the thin slice, and the thin slice is divided into multiple fragmentation cells by a plurality of crackle；It is described
Dielectric is filled in the gap of a plurality of crackle, so that the fragmentation cell mutually insulated of the crackle two sides；Double-sided adhesive, adherency
In the wherein one side of the magnetic flakes, it is thin that the another side of the magnetic flakes is formed with the protection being made of the dielectric
Film.In more detail, being will be after thermally treated amorphous or nanocrystalline strip single-sided lamination, crazing, dipping process, baking and curing
Form above structure.
Existing electromagnetic shielding chip technology 4: a kind of wireless charging electromagnetic shielding piece: the amorphous of lamination, nanometer is disclosed
Crystal layer, and it is fitted in the amorphous of the lamination, ferrite magnetic sheet, graphite flake and coil on nano-crystalline layers.In more detail,
It is by thermally treated amorphous, nanocrystalline strip single-side coating, graphical treatment (laser cutting or graphical etching), again covers
Glue etc. forms above structure.
In the prior art, be able to satisfy to a certain extent high frequency, digitlization, it is integrated, can wireless charging electronic product
Growth requirement, but there is also some problems it is still unresolved, such as.
(1) it is rolled under stacking states with the flat soft magnetic metal powder containing insulating film, a part of soft magnetism
Metal powder can generate plastic deformation, and another part can then produce fracture deformation, then the plane of disruption is nonisulated, these plane of disruption phases
Mutually contact is possible to form large stretch of nonisulated region in electromagnetic shielding piece, can be generated heat due to vortex in alternating electromagnetic field tight
Weight.
(2) to mechanical fragmentation processing is carried out after amorphous/nanocrystalline band single or double fitting after heat treatment, broken
Change region of stress concentration, there are the regions that amorphous/nanocrystalline band does not cover on electromagnetic shielding piece thickness direction, thus
It will lead to electromagnetic leakage, on the one hand can reduce the efficiency of wireless charging, on the other hand can not shield extraneous electromagnetic interference；This
Outside, after heat treatment brittleness is high for amorphous/nanocrystalline band, and carrying out, single or double patch is high to the integrity demands of band, patch
Defect rate is higher after conjunction.
(3) laser cutting or graphical etching are carried out to amorphous/nanocrystalline band, compared with Mechanical Crushing, energy consumption is high, dirty
Dye is big.
Summary of the invention
For above-mentioned an open question, the application's is designed to provide a kind of ultra-thin electromagnetic shielding piece, has preferable
Effectiveness, be not in leakage field and eddy-current heating phenomenon.
The technical solutions adopted are as follows by the application.
A kind of ultra-thin electromagnetic shielding piece, including protective layer, magnetic masking layer, layers of two-sided and release film layer, the guarantor
Sheath is the Ultrathin substrate one side glue with the first adhesive layer；The layers of two-sided is with the second adhesive layer and third adhesive layer
Double-sided adhesive (the i.e. two sides adhesive layer of double-sided adhesive, convenient for describing below.Above-mentioned two layers of easy area when double-sided adhesive, which is, substrate
Point, really it is integrated for above-mentioned two layers when double-sided adhesive is without substrate).
The magnetic masking layer spreads out and puts on be embedded in the first adhesive layer of protective layer first by discontinuous on protective layer direction
Magnetic piece debris layer and discontinuous the second magnetic piece debris layer being embedded in the second adhesive layer of layers of two-sided of spreading out and putting on are constituted；?
Filled with the binder in the first adhesive layer between one magnetic piece fragment, filled with the second bonding between the second magnetic piece fragment
Binder in layer；It is viscous in above-mentioned first adhesive layer when the first magnetic piece debris layer and the second magnetic piece debris layer overlap
Knot agent is adhered to the non-mosaic face of the second magnetic piece fragment, and it is broken that the binder in above-mentioned second adhesive layer is adhered to the first magnetic piece
Completely covering is entirely electromagnetically shielded piece jointly for the non-mosaic face of piece, the first magnetic piece debris layer and the second magnetic piece debris layer.
The third adhesive layer and release film of the layers of two-sided adhere to.
First adhesive layer, the second adhesive layer and third adhesive layer are non-conductive adhesive layer.
As another preferred embodiment of the technical program, a kind of ultra-thin electromagnetic shielding piece also have it is a plurality of as described above
Magnetic masking layer and layers of two-sided, the first magnetic piece fragment in the non-magnetic masking layer adjacent with protective layer is discontinuous to spread out and put on
Be embedded in the third adhesive layer of the layers of two-sided adjacent with the fragment, the third adhesive layer of the outermost layers of two-sided with from
The adherency of type film.
As the preferred embodiment of the technical program, the non-adjacent side of the first magnetic piece fragment and the second magnetic piece fragment
L:70 μm of any two points distance≤L≤3.3mm, the size of fragment can shield piece to magnetic conductivity real part and void according to target electromagnetic
The requirement in portion is adjusted within the above range.
Minimum as the preferred embodiment of the technical program, between the first magnetic piece fragment and the second magnetic piece fragment
H:70 μm of gap≤H≤L, the gap between the first magnetic piece fragment and the second magnetic piece fragment be in order to allow the first adhesive layer,
Binder in second adhesive layer and third adhesive layer is filled well, and is formed and effectively adhered to adjacent magnetic piece fragment
Area.
As the preferred embodiment of the technical program, the first magnetic piece fragment and the second magnetic piece fragment are through at heat
Reason, broken, surface insulation treated magnetic piece fragment；The magnetic piece is magnetically soft alloy, ferrite sheet, magnetic powder/resin shape
At at least one of polymer sheet, magnetic piece thickness D:D≤50 μm.
Further, the magnetically soft alloy is amorphous/nanocrystalline alloy sheet, in permalloy piece, molybdenum permalloy piece
At least one.
As the preferred embodiment of the technical program, the thickness T of the first adhesive layer in the protective layer1: 0.5D≤T1≤D。
As the preferred embodiment of the technical program, the layers of two-sided is the double-sided adhesive with Ultrathin substrate, ultra-thin base
Material thickness is less than 100 μm, the second adhesive layer thickness T2: 0.5D≤T2≤ D, the thickness T of third adhesive layer3: 0.5D≤T3≤D。
As the preferred embodiment of the technical program, the layers of two-sided is no substrate double-sided adhesive, the second adhesive layer and
Overall thickness T:D≤T≤2D of three adhesive layers.
Adhesive layer is blocked up, so that final finished electromagnetic shielding piece thickness is too thick, and it is real to be unsatisfactory for each electronic product at present
Existing frivolous purpose；Adhesive layer is excessively thin, and not enough binders can be made to be filled in the gap between magnetic piece fragment, so that
First magnetic piece fragment and the second magnetic piece fragment can not bond；The thickness range of adhesive layer disclosed in the present application both can guarantee
First magnetic piece fragment and the second magnetic piece fragment have preferable caking property, and are able to achieve the ultra-thin of electromagnetic shielding piece.
It is that piece is shielded using above-mentioned ultra-thin electromagnetic disclosed herein as well is a kind of electronic equipment.
The technical solution of the application compared with prior art, has the advantages that at least as follows.
(1) after overcoming magnetisable material and nonmagnetic organic matter compound, the magnetic conductivity real part of compound and former magnetisable material
The problem significant compared to decline.
(2) target electromagnetic shielding piece magnetic conductivity real and imaginary parts can be realized by the adjustment to magnetic piece chip size
It is adjustable.
(3) use the band fitting design of fragmentation different from prior art, the application uses the non-company of magnetic piece debris layer
Continuous spread out and put on is embedded in adhesive layer, the integrality not harsh requirement to band.
(4) ultrathin of electromagnetic shielding piece can be achieved under conditions of meeting electromagnetic shielding.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present application 1.
Fig. 2 is the disassembly diagram of the structural schematic diagram of the embodiment of the present application 1.
Fig. 3 is the structural schematic diagram of the embodiment of the present application 3.
Fig. 4 is the structural schematic diagram of the embodiment of the present application 5.
Appended drawing reference: 1- protective layer, the first adhesive layer in 11- protective layer, the binder in the first adhesive layer of 110-, 2-
Magnetic masking layer, 21- the first magnetic piece debris layer, 22- the second magnetic piece debris layer, 3- layers of two-sided, in 31- layers of two-sided
Two adhesive layers, 310- are filled in the binder between magnetic piece fragment in the second adhesive layer, the third bonding in 32- layers of two-sided
Layer, 320- are filled in the binder between magnetic piece fragment in third adhesive layer, the Ultrathin substrate of 300- layers of two-sided, and 4- is release
Film layer.
Specific embodiment
Further the application is specifically described below with reference to drawings and the specific embodiments, but the application is not by attached
Any restriction of figure and embodiment.
Embodiment 1.
As shown in Figure 1 and Figure 2, a kind of ultra-thin electromagnetic shields piece, including the outermost protective layer in shielding piece two sides, release film
Layer, single group magnetic masking layer and layers of two-sided.
Protective layer is the Ultrathin substrate one side glue with the first adhesive layer, and layers of two-sided is with the second adhesive layer and third
Adhesive layer without substrate double-sided adhesive.
Magnetic masking layer is made of the first magnetic piece debris layer and the second magnetic piece debris layer, wherein the first magnetic piece debris layer
It is that discontinuous spread out and put on is embedded in the first adhesive layer of protective layer on protective layer direction, the second magnetic piece debris layer is in protective layer
Discontinuous spread out and put on is embedded in the second adhesive layer of double-sided adhesive on direction.
Filled with the binder in the first adhesive layer between the first magnetic piece fragment, filled out between the second magnetic piece fragment
Filled with the binder in the second adhesive layer；When the first magnetic piece debris layer and the second magnetic piece debris layer overlap, above-mentioned first
Binder in adhesive layer is adhered to the non-mosaic face of the second magnetic piece fragment, and the binder in above-mentioned second adhesive layer is adhered to
Completely covering is entire electric jointly for the non-mosaic face of first magnetic piece fragment, the first magnetic piece debris layer and the second magnetic piece debris layer
Magnetic screen piece.
The non-mosaic face of first adhesive layer and protective layer adhere to, and the third adhesive layer and release film of layers of two-sided adhere to.
Above-mentioned first adhesive layer, the second adhesive layer and third adhesive layer are non-conductive adhesive layer.
In order to realize the adjustable of electromagnetic shielding piece magnetic conductivity real and imaginary parts, the first magnetic piece fragment and the in the present embodiment
L:70 μm≤L≤3.3mm of non-adjacent side any two points distance of two magnetic piece fragments.
Further, for example, in order to obtain the ultra-thin electromagnetic of different magnetic conductivity real and imaginary parts shielding piece, can preferably on
State bigger than normal or less than normal or intermediate region dimensional values in range.
Meanwhile in order to guarantee that the first magnetic piece fragment and the second magnetic piece fragment have preferable caking property, need to control
Interfragmental gap, it is preferable that H:70 μm of minimum clearance≤H≤L between the first magnetic piece fragment and the second magnetic piece fragment,
The selection in this gap needs the non-adjacent side any two points distance according to fragment.
Above-mentioned first magnetic piece fragment and the second magnetic piece fragment are thermally treated, broken, surface insulation treated magnetic
Thickness D:D≤50 μm of property piece fragment magnetic piece.
Magnetic piece is chosen as at least one of the polymer sheet that magnetically soft alloy, ferrite sheet, magnetic powder/resin are formed, soft
Magnetic alloy is chosen as amorphous/nanocrystalline alloy sheet, permalloy piece, molybdenum permalloy piece etc. in the alloy of soft magnet performance
It is at least one.
The thickness T of first adhesive layer in above-mentioned protective layer1: 0.5D≤T1≤ D, the second adhesive layer and third adhesive layer it is total
Thickness T:D≤T≤2D.
Above-mentioned ultra-thin electromagnetic shielding piece can be used for all kinds of electronic equipments for having electromagnetic shielding to need.
Embodiment 2.
A kind of ultra-thin electromagnetic shielding piece, including the outermost protective layer in shielding piece two sides, release film layer, single group magnetic masking layer
And layers of two-sided.
Protective layer is the Ultrathin substrate one side glue with the first adhesive layer, and layers of two-sided is with the second adhesive layer and third
The Ultrathin substrate double-sided adhesive of adhesive layer, Ultrathin substrate thickness is less than 100 μm, the second adhesive layer thickness T2: 0.5D≤T2≤ D, third
The thickness T of adhesive layer3: 0.5D≤T3≤D。
Remaining is similar to Example 1.
Embodiment 3.
As shown in figure 3, a kind of ultra-thin electromagnetic shields piece, including shields the outermost protective layer in piece two sides, release film layer, two
Group magnetic masking layer and layers of two-sided.
First group of magnetic masking layer/layers of two-sided: magnetic masking layer is by the first magnetic piece debris layer and the second magnetic piece debris layer
It constitutes, wherein the first magnetic piece debris layer is that discontinuous spread out and put on is embedded in the first adhesive layer of protective layer on protective layer direction,
Second magnetic piece debris layer is that discontinuous spread out and put on is embedded in the second adhesive layer of double-sided adhesive on protective layer direction.
Second group of magnetic masking layer/layers of two-sided: magnetic masking layer is by the first magnetic piece debris layer and the second magnetic piece debris layer
It constitutes, wherein the first magnetic piece debris layer is that discontinuous spread out and put on is embedded in first group of magnetic masking layer/two-sided on protective layer direction
In glue-line in the third adhesive layer of double-sided adhesive, the second magnetic piece debris layer is that discontinuous spread out and put on is embedded in this on protective layer direction
In layer the second adhesive layer of double-sided adhesive.
The non-mosaic face of first adhesive layer and protective layer adhere to, layers of two-sided in second group of magnetic masking layer/layers of two-sided
Third adhesive layer and release film adhere to,
Remaining is similar with implementing 1.
Embodiment 4.
A kind of ultra-thin electromagnetic shielding piece, including the outermost protective layer in shielding piece two sides, release film layer, multiple groups magnetic masking layer
And layers of two-sided.
Far from the first magnetic piece debris layer in one group of magnetic masking layer/layers of two-sided of protective film it is discontinuous spread out and put on be embedded in
In third adhesive layer in one group of adjacent magnetic masking layer/layers of two-sided of the fragment.
Remaining is similar to Example 3.
Embodiment 5.
As shown in figure 4, a kind of ultra-thin electromagnetic shields piece, including shields the outermost protective layer in piece two sides, release film layer, two
Group magnetic masking layer and layers of two-sided are Ultrathin substrate will to be used two-sided without substrate layers of two-sided on the basis of embodiment 3
Glue, Ultrathin substrate thickness is less than 100 μm, the second adhesive layer thickness T2: 0.5D≤T2≤ D, the thickness T of third adhesive layer3: 0.5D
≤T3≤D。
Embodiment 6.
A kind of ultra-thin electromagnetic shielding piece, including the outermost protective layer in shielding piece two sides, release film layer, multiple groups magnetic masking layer
And layers of two-sided, it is that will use Ultrathin substrate double-sided adhesive, Ultrathin substrate without substrate layers of two-sided on the basis of embodiment 4
Thickness is less than 100 μm, the second adhesive layer thickness T2: 0.5D≤T2≤ D, the thickness T of third adhesive layer3: 0.5D≤T3≤D。
The foregoing is merely the application preferably embodiments, not thereby limit the scope of protection of the present invention, everything is utilized
The equivalent structure that description of the invention and accompanying drawing content are done, directly or indirectly is used in other related technical areas,
It similarly include within the scope of protection of this application.
Claims (10)
1. a kind of ultra-thin electromagnetic shields piece, including protective layer (1), magnetic masking layer (2), layers of two-sided (3) and release film layer
(4), it is characterised in that:
The protective layer is the Ultrathin substrate one side glue with the first adhesive layer (11)；
The layers of two-sided is the double-sided adhesive with the second adhesive layer (31) and third adhesive layer (32)；
The magnetic masking layer spreads out and puts on the be embedded in the first adhesive layer of protective layer first magnetism by discontinuous on protective layer direction
Piece debris layer (21) and discontinuous the second magnetic piece debris layer (22) being embedded in the second adhesive layer of layers of two-sided of spreading out and putting on are constituted；
Filled with the binder (110) in the first adhesive layer between the first magnetic piece fragment, filled between the second magnetic piece fragment
There is the binder (310) in the second adhesive layer；When the first magnetic piece debris layer and the second magnetic piece debris layer overlap, above-mentioned the
Binder in one adhesive layer is adhered to the non-mosaic face of the second magnetic piece fragment, the binder adherency in above-mentioned second adhesive layer
In the non-mosaic face of the first magnetic piece fragment, completely covering is entire jointly for the first magnetic piece debris layer and the second magnetic piece debris layer
It is electromagnetically shielded piece；
The third adhesive layer and release film of the layers of two-sided adhere to；
First adhesive layer, the second adhesive layer and third adhesive layer are non-conductive adhesive layer.
2. a kind of ultra-thin electromagnetic shields piece, including protective layer and release film layer, it is characterised in that: also have plural groups such as right
The first magnetic piece fragment it is required that magnetic masking layer described in 1 and layers of two-sided, in the non-magnetic masking layer adjacent with protective layer
It is discontinuous to spread out and put in the third adhesive layer for being embedded in the layers of two-sided adjacent with the fragment, and filled with described the between the fragment
Binder (320) in three adhesive layers, the third adhesive layer and release film of the outermost layers of two-sided adhere to.
3. ultra-thin electromagnetic according to claim 1 or 2 shields piece, it is characterised in that: the first magnetic piece fragment and the
L:70 μm≤L≤3.3mm of non-adjacent side any two points distance of two magnetic piece fragments.
4. ultra-thin electromagnetic according to claim 1 or 2 shields piece, it is characterised in that: the first magnetic piece fragment and the
H:70 μm of minimum clearance≤H≤L between two magnetic piece fragments.
5. ultra-thin electromagnetic according to claim 1 or 2 shields piece, it is characterised in that: the first magnetic piece fragment and the
Two magnetic piece fragments are thermally treated, broken, surface insulation treated magnetic piece fragment；The magnetic piece be magnetically soft alloy,
At least one of the polymer sheet that ferrite sheet, magnetic powder/resin are formed, magnetic piece thickness D:D≤50 μm.
6. ultra-thin electromagnetic according to claim 5 shields piece, it is characterised in that: the magnetically soft alloy is amorphous/nanocrystalline
At least one of alloy sheet, permalloy piece, molybdenum permalloy piece.
7. ultra-thin electromagnetic according to claim 1 or 2 shields piece, it is characterised in that: the first bonding in the protective layer
The thickness T of layer1: 0.5D≤T1≤D。
8. ultra-thin electromagnetic according to claim 1 or 2 shields piece, it is characterised in that: the layers of two-sided is with ultra-thin
The double-sided adhesive of substrate (300), Ultrathin substrate thickness is less than 100 μm, the second adhesive layer thickness T2: 0.5D≤T2≤ D, third are viscous
Tie the thickness T of layer3: 0.5D≤T3≤D。
9. ultra-thin electromagnetic according to claim 1 or 2 shields piece, it is characterised in that: the layers of two-sided is double for no substrate
Overall thickness T:D≤T≤2D of face glue, the second adhesive layer and third adhesive layer.
10. a kind of electronic equipment, it is characterised in that: shield piece including ultra-thin electromagnetic described in one of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135597.5A CN108990406B (en) | 2018-09-28 | 2018-09-28 | Ultrathin electromagnetic shielding sheet and electronic equipment using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135597.5A CN108990406B (en) | 2018-09-28 | 2018-09-28 | Ultrathin electromagnetic shielding sheet and electronic equipment using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108990406A true CN108990406A (en) | 2018-12-11 |
| CN108990406B CN108990406B (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811135597.5A Active CN108990406B (en) | 2018-09-28 | 2018-09-28 | Ultrathin electromagnetic shielding sheet and electronic equipment using same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109328011A (en) * | 2018-11-05 | 2019-02-12 | 苏州世诺新材料科技有限公司 | Ultra-thin electromagnetic shields piece and preparation method thereof |
| CN109859897A (en) * | 2019-01-04 | 2019-06-07 | 江苏科麦特科技发展有限公司 | Discontinuous shielding band of one kind and preparation method thereof |
| CN110113924A (en) * | 2019-05-05 | 2019-08-09 | 深圳市晶磁材料技术有限公司 | It is electromagnetically shielded piece and preparation method thereof |
| CN113993365A (en) * | 2021-10-28 | 2022-01-28 | 横店集团东磁股份有限公司 | Magnetic shielding structure for wireless charging and preparation method thereof |
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| CN109328011A (en) * | 2018-11-05 | 2019-02-12 | 苏州世诺新材料科技有限公司 | Ultra-thin electromagnetic shields piece and preparation method thereof |
| CN109859897A (en) * | 2019-01-04 | 2019-06-07 | 江苏科麦特科技发展有限公司 | Discontinuous shielding band of one kind and preparation method thereof |
| CN109859897B (en) * | 2019-01-04 | 2020-07-24 | 江苏科麦特科技发展有限公司 | Preparation method of discontinuous shielding belt |
| CN110113924A (en) * | 2019-05-05 | 2019-08-09 | 深圳市晶磁材料技术有限公司 | It is electromagnetically shielded piece and preparation method thereof |
| CN110113924B (en) * | 2019-05-05 | 2024-01-16 | 深圳市晶磁材料技术有限公司 | Electromagnetic shielding sheet and manufacturing method thereof |
| CN113993365A (en) * | 2021-10-28 | 2022-01-28 | 横店集团东磁股份有限公司 | Magnetic shielding structure for wireless charging and preparation method thereof |
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