CN110113924B - Electromagnetic shielding sheet and manufacturing method thereof - Google Patents
Electromagnetic shielding sheet and manufacturing method thereof Download PDFInfo
- Publication number
- CN110113924B CN110113924B CN201910369018.1A CN201910369018A CN110113924B CN 110113924 B CN110113924 B CN 110113924B CN 201910369018 A CN201910369018 A CN 201910369018A CN 110113924 B CN110113924 B CN 110113924B
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- Prior art keywords
- magnetic conduction
- sheet
- layer
- magnetic
- electromagnetic shielding
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- 238000004519 manufacturing process Methods 0.000 title abstract description 16
- 239000000758 substrate Substances 0.000 claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 230000001681 protective effect Effects 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 238000003892 spreading Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F10/00—Thin magnetic films, e.g. of one-domain structure
- H01F10/08—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
- H01F10/10—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
- H01F10/12—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys
- H01F10/13—Amorphous metallic alloys, e.g. glassy metals
- H01F10/138—Amorphous metallic alloys, e.g. glassy metals containing nanocrystallites, e.g. obtained by annealing
-
- 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
-
- 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
- H05K9/0088—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a plurality of shielding layers; combining different shielding material structure
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Power Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention provides an electromagnetic shielding sheet, which comprises a first magnetic conduction layer and a substrate layer fixedly connected with the first magnetic conduction layer, wherein the first magnetic conduction layer comprises a layer of first magnetic conduction sheet and a layer of second magnetic conduction sheet, and the layer of first magnetic conduction sheet and the layer of second magnetic conduction sheet are partially overlapped; the invention also provides a manufacturing method of the electromagnetic shielding sheet; by applying the manufacturing method, the manufacturing requirement of the large-size magnetic conduction shielding sheet is met, and the magnetic conduction shielding sheet is arranged by applying the first magnetic conduction layer with the magnetic material sheets partially overlapped, so that the magnetic energy of the large-size electromagnetic shielding sheet is ensured to be conducted unimpeded and the magnetic leakage phenomenon is avoided while the requirement of the processing application of the large-size electromagnetic shielding sheet is effectively met.
Description
Technical Field
The invention relates to the technical field of electromagnetic shielding sheet manufacturing, in particular to an electromagnetic shielding sheet and a manufacturing method thereof.
Background
In the prior art, the magnetic materials applied to the electromagnetic shielding sheet are mainly iron-based amorphous, iron-based nanocrystalline, iron-nickel alloy, cobalt-based amorphous and the like, and the width of the magnetic strip obtained by conventional production and manufacture of the magnetic strip is limited, so that the width and the size of the electromagnetic shielding sheet obtained by manufacture are limited.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an electromagnetic shielding sheet and a manufacturing method thereof.
The electromagnetic shielding sheet comprises a first magnetic conduction layer and a base material layer fixedly connected with the first magnetic conduction layer, wherein the first magnetic conduction layer comprises a first magnetic conduction sheet and a second magnetic conduction sheet, and the first magnetic conduction sheet and the second magnetic conduction sheet are partially overlapped.
Further, the material of the first magnetic conduction sheet and/or the second magnetic conduction sheet is iron-based amorphous or iron-based nanocrystalline or iron-nickel alloy or cobalt-based amorphous.
Further, the substrate layer comprises a second magnetic conduction layer, and the first magnetic conduction layer and the second magnetic conduction layer are fixedly bonded.
Further, the second magnetic conduction layer comprises two layers of first magnetic conduction sheets and two layers of second magnetic conduction sheets, and the two layers of first magnetic conduction sheets and the two layers of second magnetic conduction sheets are partially overlapped.
Further, the second magnetic conductive layer comprises a magnetic conductive metal layer.
Further, the magnetic conductive metal layer is made of aluminum.
Further, the substrate layer includes a protective film.
Further, the first magnetic conductive sheet and the second magnetic conductive sheet are rectangular strips, and the first magnetic conductive sheet and the second magnetic conductive sheet are parallel to each other along the long side direction and partially overlap.
Further, the overlapping width range of the first magnetic conduction sheet and the second magnetic conduction sheet is 3-5mm.
The invention also comprises a manufacturing method of the electromagnetic shielding sheet, which comprises the following steps:
s1, spreading the first magnetic conductive sheet and the second magnetic conductive sheet and applying tension;
s2, overlapping the projected parts of the first magnetic conductive sheet and the second magnetic conductive sheet in the vertical direction after spreading and superposing the first magnetic conductive sheet and the second magnetic conductive sheet;
s3, inputting the laminated first magnetic conduction sheet, the laminated second magnetic conduction sheet and the glued substrate layer into a compacting mechanism, wherein the glued side of the substrate layer faces the laminated first magnetic conduction sheet and the laminated second magnetic conduction sheet;
s4, driving the compressing mechanism to compress and bond the laminated first magnetic conductive sheet and the laminated second magnetic conductive sheet on the adhesive side of the substrate layer to obtain a laminated magnetic conductive layer;
s5, coating the obtained coated magnetic conductive layer with a protective film to obtain the electromagnetic shielding sheet.
The invention has the beneficial effects that:
by applying the manufacturing method, the manufacturing requirement of the large-size magnetic conduction shielding sheet is met, and the magnetic conduction shielding sheet is arranged by applying the first magnetic conduction layer with the magnetic material sheets partially overlapped, so that the magnetic energy of the large-size electromagnetic shielding sheet is ensured to be conducted unimpeded and the magnetic leakage phenomenon is avoided while the requirement of the processing application of the large-size electromagnetic shielding sheet is effectively met.
Drawings
Fig. 1 is a first structural schematic diagram of an electromagnetic shielding sheet according to the present invention;
fig. 2 is a second structural schematic diagram of the electromagnetic shielding sheet of the present invention;
FIG. 3 is a schematic view of a third structure of the electromagnetic shielding sheet of the present invention;
FIG. 4 is a schematic view of the application of the compacting mechanism of the present invention
Reference numerals illustrate: the magnetic sheet comprises a first magnetic conduction sheet 11, a second magnetic conduction sheet 12, a third magnetic conduction sheet 13, a second first magnetic conduction sheet 21, a second magnetic conduction sheet 22, a second third magnetic conduction sheet 23, viscose 3, a magnetic conduction metal layer 4, a protective film 5, an upper compression roller 61, a lower compression roller 62 and a deviation corrector 63.
Detailed Description
In order to make the technical scheme, the purpose and the advantages of the invention more clear, the invention is further explained below with reference to the drawings and the embodiments.
Example 1:
as shown in fig. 1, the electromagnetic shielding sheet of the present invention comprises a first magnetic conductive layer and a substrate layer fixedly connected with the first magnetic conductive layer, wherein the first magnetic conductive layer comprises a layer of first magnetic conductive sheet, a layer of second magnetic conductive sheet and a layer of third magnetic conductive sheet, the layer of first magnetic conductive sheet, the layer of second magnetic conductive sheet and the layer of third magnetic conductive sheet are sequentially arranged, and the adjacent parts of the layer of first magnetic conductive sheet and the layer of second magnetic conductive sheet are overlapped; the adjacent parts of the second magnetic conduction sheet and the third magnetic conduction sheet are overlapped; the first magnetic conductive sheet and the third magnetic conductive sheet are overlapped and arranged above the second magnetic conductive sheet.
The substrate layer comprises a first protection film arranged on the lower side of the first magnetically permeable layer, and the upper side of the first protection film is provided with adhesive so as to bond and fix the first magnetically permeable layer; the upper side of the first magnetic conduction layer is provided with a second protective film, and the lower side of the second protective film is provided with adhesive so as to be adhered and fixed on the upper side of the first magnetic conduction layer, thereby forming a first electromagnetic shielding sheet in a covering way.
Example 2:
as shown in fig. 2, this embodiment differs from embodiment 1 in that: the overlapping mode of each magnetic conduction sheet in the first magnetic conduction layer; the first magnetic conductive sheet, the second magnetic conductive sheet and the third magnetic conductive sheet are sequentially arranged, and the adjacent parts of the first magnetic conductive sheet and the second magnetic conductive sheet are overlapped; the adjacent parts of the second magnetic conduction sheet and the third magnetic conduction sheet are overlapped; the first magnetic conduction sheet is overlapped and arranged above the second magnetic conduction sheet, and the second magnetic conduction sheet is overlapped and arranged above the third magnetic conduction sheet.
And a magnetic conduction metal layer is arranged between the first magnetic conduction layer and the first protective film, the magnetic conduction metal layer is an aluminum foil, and the magnetic conduction metal layer is fixed with the first magnetic conduction layer and the first protective film through adhesive bonding.
Example 3:
as shown in fig. 3, this embodiment differs from embodiment 2 in that: the upper side of the first magnetic conduction layer is fixedly connected with a second magnetic conduction layer through adhesive, and the first magnetic conduction layer comprises a first magnetic conduction sheet, a second magnetic conduction sheet, a third magnetic conduction sheet, a fourth magnetic conduction sheet and a fifth magnetic conduction sheet which are sequentially arranged; the adjacent parts of the magnetic conduction sheets are overlapped, and the upper sides of the first magnetic conduction sheet, the third magnetic conduction sheet and the fifth magnetic conduction sheet are overlapped with the upper sides of the second magnetic conduction sheet and the fourth magnetic conduction sheet.
The second magnetic conduction layer comprises two layers of first magnetic conduction sheets, two layers of second magnetic conduction sheets, two layers of third magnetic conduction sheets, two layers of fourth magnetic conduction sheets and two layers of fifth magnetic conduction sheets which are sequentially arranged; the adjacent parts of the two layers of magnetic conducting sheets are overlapped, the two layers of first magnetic conducting sheets are overlapped and arranged above the two layers of second magnetic conducting sheets, the two layers of second magnetic conducting sheets are overlapped and arranged above one side of the two layers of third magnetic conducting sheets, and the two layers of fourth magnetic conducting sheets are overlapped and arranged above the other side of the two layers of third magnetic conducting sheets; the second layer of fifth magnetic conduction sheet is overlapped and arranged above the second layer of fourth magnetic conduction sheet.
In the above embodiment, the material of each magnetic conductive sheet of the first magnetic conductive layer and each magnetic conductive sheet of the second magnetic conductive layer is iron-based amorphous or iron-based nanocrystalline or iron-nickel alloy or cobalt-based amorphous; the materials of the magnetic conductive sheets in the same magnetically conductive layer may be the same or different.
The magnetic conductive sheets of the magnetic conductive layers can be arranged as magnetic strips in a rectangular strip shape in the prior art, and the adjacent magnetic conductive sheets applied as the magnetic strips are mutually arranged in parallel along the long side direction and are partially overlapped; the non-adjacent magnetic conductive sheets at any interval are not overlapped; each magnetic conductive sheet may be divided into a non-overlapping region and an overlapping region overlapping with the adjacent magnetic conductive sheet; the non-overlapping region should be greater than the overlapping region; as a preferred embodiment, the width of the overlapping area where the adjacent magnetic conductive sheets overlap is in the range of 3-5mm.
The invention also provides a manufacturing method for manufacturing the electromagnetic shielding sheet, which comprises the following steps:
s1, spreading the first magnetic conductive sheet and the second magnetic conductive sheet and applying tension;
the magnetic conductive sheets can be guided out along the long side direction of the strip-shaped magnetic conductive sheets in a combined mode of arranging a transmission roller shaft and winding and unwinding; and the tension roller shaft and the tension detector are arranged to ensure that the tension state of each magnetic conductive sheet is good, and the formation of wrinkles is avoided.
S2, overlapping the projected parts of the first magnetic conductive sheet and the second magnetic conductive sheet in the vertical direction after spreading and superposing the first magnetic conductive sheet and the second magnetic conductive sheet;
each winding and unwinding roll has different magnetic conductive sheets, and then the adjacent winding and unwinding positions are staggered along the material guiding direction, so that the projection parts of the two adjacent magnetic conductive sheets in the vertical direction can be overlapped, and the adjacent magnetic conductive sheets are overlapped.
S3, inputting the laminated first magnetic conduction sheet, the laminated second magnetic conduction sheet and the glued substrate layer into a compacting mechanism, wherein the glued side of the substrate layer faces the laminated first magnetic conduction sheet and the laminated second magnetic conduction sheet;
as shown in fig. 4, specifically, the compacting mechanism includes an upper compacting roller and a lower compacting roller, when in processing, the input first magnetically conductive layers can be respectively overlapped with the magnetically conductive sheets and connected to the upper compacting roller, so that the substrate layer is connected to the lower compacting roller, the substrate layer is preset with adhesive, and the adhesive side of the substrate layer faces to the first magnetically conductive layer, i.e. faces to the upper compacting roller.
S4, driving the compressing mechanism to compress and bond the laminated first magnetic conductive sheet and the laminated second magnetic conductive sheet on the adhesive side of the substrate layer to obtain a laminated magnetic conductive layer;
s5, coating the obtained coated magnetic conductive layer with a protective film to obtain the electromagnetic shielding sheet.
The electromagnetic shielding sheet obtained by splicing and overlapping is flat through the application of the tensioning roller shaft and the tension detector, even if the distance between the shielding sheet and the antenna board is equal during installation, the generated inductance of the shielding sheet is kept consistent, and the installation space can be saved.
The foregoing is merely a preferred embodiment of the present invention, and modifications of the embodiments described above can be made by those skilled in the art without departing from the implementation principles of the present invention, and the corresponding modifications should also be considered as the protection scope of the present invention.
Claims (7)
1. The electromagnetic shielding sheet is characterized by comprising a first magnetic conduction layer and a substrate layer fixedly connected with the first magnetic conduction layer, wherein the first magnetic conduction layer comprises a layer of first magnetic conduction sheet, a layer of second magnetic conduction sheet and a layer of third magnetic conduction sheet, the layer of first magnetic conduction sheet, the layer of second magnetic conduction sheet and the layer of third magnetic conduction sheet are sequentially arranged, and the adjacent parts of the layer of first magnetic conduction sheet and the layer of second magnetic conduction sheet are overlapped; the adjacent parts of the second magnetic conduction sheet and the third magnetic conduction sheet are overlapped; the first magnetic conduction sheet is overlapped and arranged above the second magnetic conduction sheet, and the second magnetic conduction sheet is overlapped and arranged above the third magnetic conduction sheet;
the substrate layer comprises a second magnetic conduction layer, and the first magnetic conduction layer and the second magnetic conduction layer are bonded and fixed; the second magnetic conduction layer comprises two layers of first magnetic conduction sheets and two layers of second magnetic conduction sheets, and the two layers of first magnetic conduction sheets and the two layers of second magnetic conduction sheets are partially overlapped.
2. The electromagnetic shielding sheet according to claim 1, wherein the material of the one layer of the first magnetic conductive sheet and/or the one layer of the second magnetic conductive sheet is iron-based amorphous or iron-based nanocrystalline or iron-nickel alloy or cobalt-based amorphous.
3. The electromagnetic shield according to claim 1, wherein the second magnetically permeable layer comprises a magnetically permeable metal layer.
4. The electromagnetic shield according to claim 3, wherein the magnetically permeable metal layer is aluminum.
5. The electromagnetic shielding sheet of claim 1, wherein the substrate layer comprises a protective film.
6. The electromagnetic shielding sheet according to claim 1, wherein the first magnetic conductive sheet and the second magnetic conductive sheet each have a rectangular belt shape, and the first magnetic conductive sheet and the second magnetic conductive sheet are arranged in parallel with each other along a longitudinal direction thereof and partially overlap.
7. The electromagnetic shield according to claim 6, wherein the width of the overlap of the first layer of magnetic conductive sheets and the second layer of magnetic conductive sheets is in the range of 1-5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910369018.1A CN110113924B (en) | 2019-05-05 | 2019-05-05 | Electromagnetic shielding sheet and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910369018.1A CN110113924B (en) | 2019-05-05 | 2019-05-05 | Electromagnetic shielding sheet and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110113924A CN110113924A (en) | 2019-08-09 |
| CN110113924B true CN110113924B (en) | 2024-01-16 |
Family
ID=67488091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910369018.1A Active CN110113924B (en) | 2019-05-05 | 2019-05-05 | Electromagnetic shielding sheet and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110113924B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040063911A (en) * | 2001-11-09 | 2004-07-14 | 티디케이가부시기가이샤 | Composite magnetic element, electromagnetic wave absorbing sheet, production method for sheet-form article, production method for electromagnetic wave absorbing sheet |
| WO2010140367A1 (en) * | 2009-06-04 | 2010-12-09 | 株式会社 東芝 | Magnetic sheet with mount and method for producing electronic component using the same |
| CN108990406A (en) * | 2018-09-28 | 2018-12-11 | 苏州世诺新材料科技有限公司 | Ultra-thin electromagnetic shields piece and the electronic equipment using it |
| 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 |
| CN210008162U (en) * | 2019-05-05 | 2020-01-31 | 深圳市晶磁材料技术有限公司 | Electromagnetic shielding sheet |
-
2019
- 2019-05-05 CN CN201910369018.1A patent/CN110113924B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040063911A (en) * | 2001-11-09 | 2004-07-14 | 티디케이가부시기가이샤 | Composite magnetic element, electromagnetic wave absorbing sheet, production method for sheet-form article, production method for electromagnetic wave absorbing sheet |
| WO2010140367A1 (en) * | 2009-06-04 | 2010-12-09 | 株式会社 東芝 | Magnetic sheet with mount and method for producing electronic component using the same |
| CN108990406A (en) * | 2018-09-28 | 2018-12-11 | 苏州世诺新材料科技有限公司 | Ultra-thin electromagnetic shields piece and the electronic equipment using it |
| 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 |
| CN210008162U (en) * | 2019-05-05 | 2020-01-31 | 深圳市晶磁材料技术有限公司 | Electromagnetic shielding sheet |
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| Publication number | Publication date |
|---|---|
| CN110113924A (en) | 2019-08-09 |
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Effective date of registration: 20200424 Address after: 518106 402, building 4, Xianan third industrial zone, Shangcun community, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Dingtai magnetic material Co.,Ltd. Address before: 518106 Siquan Industrial Park, Jiangbian Village Haikou Industrial Zone, Dongguan City, Guangdong Province Applicant before: SHENZHEN JINGCI MATERIAL TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20201117 Address after: 518000 the third floor of Yuwei factory building at the junction of Qingxiang road and Qinghua Road, Qinghu community, Longhua street, longzuo District, Shenzhen City, Guangdong Province Applicant after: SHENZHEN JINGCI MATERIAL TECHNOLOGY Co.,Ltd. Address before: 518106 402, building 4, Xianan third industrial zone, Shangcun community, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Applicant before: Shenzhen Dingtai magnetic material Co.,Ltd. |
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