CN104064336B - graphite coil planar pulse transformer - Google Patents
graphite coil planar pulse transformer Download PDFInfo
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- CN104064336B CN104064336B CN201310095423.1A CN201310095423A CN104064336B CN 104064336 B CN104064336 B CN 104064336B CN 201310095423 A CN201310095423 A CN 201310095423A CN 104064336 B CN104064336 B CN 104064336B
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- graphite
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- punching block
- insulating substrate
- layer
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 64
- 239000010439 graphite Substances 0.000 title claims abstract description 64
- 239000000758 substrate Substances 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- 238000007650 screen-printing Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 3
- 238000004080 punching Methods 0.000 claims description 47
- 238000007639 printing Methods 0.000 claims description 16
- 239000000853 adhesive Substances 0.000 claims description 13
- 230000001070 adhesive effect Effects 0.000 claims description 13
- 239000006210 lotion Substances 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 7
- 239000007770 graphite material Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 2
- 238000004804 winding Methods 0.000 claims 2
- 239000010410 layer Substances 0.000 abstract description 41
- 239000002356 single layer Substances 0.000 abstract description 8
- 239000011889 copper foil Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Manufacturing Cores, Coils, And Magnets (AREA)
- Coils Of Transformers For General Uses (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Graphite coil planar pulse transformer according to the present invention substitutes copper foil using the excellent graphite of electric conductivity, utilize mould pressing process, screen printing technique or coated technique, prepare single layer planar coil respectively on insulating substrate, further according to the design and technological requirement of product, single layer planar coil is stacked as required and makes interlevel via, coil is guided to the external electrical contacts of transformer by copper electrode, the integrated coil to complete is by the entirety of primary one-layer planar coil and sub-mono-layer planar coil stacked combination as required, stacking for primary and secondary single layer planar coil sequentially can flexibly be put according to the design requirement of product.Manufacturing cost is greatly reduced while effectively reducing material cost in made graphite coil planar pulse transformer.
Description
Technical field
The present invention relates to planar pulse transformer technologies.More particularly to graphite coil planar pulse transformer.
Background technology
With being constantly progressive for switch power technology, in middle low power Switching Power Supply product, planar pulse transformer with
The excellent performance that its is small, efficient, leakage inductance is small gradually replaces traditional pulse transformer.But up to the present,
The making of planar pulse transformer is all made of multilayer board manufacturing technology, and copper is used on glassfiber insulation substrate
Foil makes spiral planar coil, which has following technological deficiency：
1, the number of plies of flat surface transformer is mostly between 10~20 layers, or even up to 20 layers or more, and multilayer printed circuit
The makes sample of plate does not exceed 10 layers, therefore is had to production equipment and manufacture craft using multilayer board manufacturing technology
Very high requirement, most of manufacturers are difficult to meet；
2, production cost is very high, and the rejection rate of product is also very high, constrains the popularization and application of flat surface transformer；
3, the current lead-through of interlayer continues to use the via technique of printed circuit board, it is difficult to which the requirement for meeting high current is printing
Circuit-board processes make the technical bottleneck of flat surface transformer.
Invention content
Graphite coil planar pulse transformer according to the present invention substitutes copper foil, profit using the excellent graphite of electric conductivity
With mould pressing process, screen printing technique or coated technique, mono-layer graphite planar coil is prepared respectively on insulating substrate 3-2,
Further according to the design and technological requirement of product, single layer planar coil is stacked and made interlevel via as required, passes through copper electrode
Coil is guided to the external electrical contacts of transformer by 3-1, the integrated coil to complete be by primary one-layer planar coil and time
The entirety of grade single layer planar coil stacked combination as required, primary and secondary single layer planar coil stack sequence can be according to product
Design requirement is flexibly put.Made graphite coil planar pulse transformer is while effectively reducing material cost, substantially
Reduce manufacturing cost.Make graphite coil planar pulse transformer used by graphite material be purity reach 99.5% with
On, granularity is less than the Conventional graphite material of 2000 mesh.
Graphite plane coil is made using mould pressing process：Corresponding upper punching block is made according to the shape and size of planar coil
5-1 and lower punching block 6-1, upper punching block are formpiston, and lower punching block is former.The spiral of the graphite-filled slot 7-1 of lower punching block and work of drawing up
Planar coil is consistent, the graphite-filled slot precision-fit of upper punching block and lower punching block.
Insulating substrate 3-2 is placed on the lower board of moulding press, and lower punching block 6-1 and insulating substrate 3-2 is matched by location hole
It closes, lower punching block 6-1 is placed on above substrate 3-2；High-purity is uniformly filled in the graphite-filled slot 7-1 of lower punching block 6-1
Graphite fine powder (granularity of graphite fine powder is adjusted according to the specific requirement of product), upper punching block 5-1 is assemblied in the upper board of moulding press
On, coordinated using positioning guide column 5-2 between upper punching block 5-1 and lower punching block 6-1；Moulding press works, upper punching block 5-1 vertical drop pressures
Graphite powder in the graphite-filled slot 7-1 of tight lower punching block 6-1, pressure can be adjusted according to the specific requirement of product and (usually set
It is scheduled on 25MPa), keep pressure 20 seconds or more；After pressure relief, the spiral shape for meeting intensity requirement is formed on insulating substrate
Graphite plane coil.After the completion of compacting, one layer of insulating substrate 3-2 is stacked, on the insulating substrate 3-2 being superimposed afterwards in position
It is reserved with the qualified through-hole of design, which communicates with the same group of graphite coil that front completes, in compacting this layer line circle
Via is filled up with graphite powder simultaneously, this layer line circle is made to be connected to the same group of graphite coil that front completes, repeats pressure above
Process processed has suppressed one layer of insulating substrate 3-2 of superposition after this layer line circle and carries out next layer of printing again making ... and recycled according to this
Until entire coil completes.
Graphite plane coil is made using screen printing technique：Granularity is selected to be less than the pure graphite powder of 2000 purposes, with appropriate
Adhesive to be modulated into viscosity body of paste appropriate spare；Corresponding web plate 8 is made according to the specification of each layer line circle；It utilizes
The web plate made, the printing making graphite plane coil on insulating substrate 3-2, drying technique keep the adhesive in lotion solid
After change, the printing that one layer of insulating substrate of superposition carries out next layer again makes；On the insulating substrate 3-2 being superimposed afterwards in position
It is reserved with the qualified through-hole of design, which communicates with the same group of graphite coil that front completes, in printed book layer line circle
Via is filled up with oildag simultaneously, so that this layer line circle is connected to the same group of graphite coil that front completes, is passed through after being completed for printing
After stoving process makes the adhesive curing in lotion, the printing that one layer of insulating substrate of superposition carries out next layer again makes ... according to this
Cycle is until entire coil completes.
Graphite plane coil is made using coated technique：Go out according to the dimensioned of this layer line circle on insulating substrate 3-2
The suitable groove 9-1 of depth, the viscosity modulated oildag appropriate is coated in groove 9-1, vibrates work through shake table
It is dried after sequence, the insulating substrate 3-2 of one layer of prefabricated coil groove of superposition carries out next layer again after the drying of this layer line circle
Printing makes, and is reserved with the qualified through-hole 9-2 of design, the via and front system on the insulating substrate being superimposed afterwards in position
Same group of graphite coil for making to complete communicates, and via is filled up with oildag while applying this layer line circle, makes this layer line circle with before
The same group of graphite coil connection that face completes, after coating completion after stoving process makes the adhesive curing in lotion, superposition
The coating that one layer of insulating substrate carries out next layer again, which makes ... recycles according to this until entire coil completes.
Description of the drawings
Fig. 1：Flat surface transformer structural schematic diagram
1-1 --- primary graphite plane coil I；
1-2 --- primary graphite plane coil II；
2-1 --- secondary graphite plane coil；
3-1 --- copper electrode；
4-1 --- magnetic core.
Fig. 2：Mould pressing process schematic diagram
3-1 --- copper electrode；
3-2 --- insulating substrate；
5-1 --- upper punching block；
5-2 --- positioning guide column；
6-1 --- lower punching block；
6-2 --- location hole；
7-1 --- graphite-filled slot.
Fig. 3：Lower structure of steel die schematic diagram
6-2 --- location hole；
7-1 --- graphite-filled slot.
Fig. 4：Upper structure of steel die schematic diagram
5-2 --- positioning guide column；
5-3 --- planar coil helix.
Fig. 5：Printing screen schematic diagram
8 --- steel mesh；
8-1 --- planar line ring recess.
Fig. 6：Coated technique insulating substrate schematic diagram
3-2 --- insulating substrate；
9-1 --- coil groove；
9-2 --- coil via；
9-3 --- location hole.
Specific implementation mode
Embodiment one：Mould pressing process makes graphite plane coil pulse flat surface transformer.
Corresponding upper punching block and lower punching block are made according to the shape and size of planar coil, upper punching block is formpiston, lower punching block
For former.The graphite-filled slot of lower punching block is consistent with the spiral planar coil for work of drawing up, and the graphite of upper punching block and lower punching block is filled out
Fill slot precision-fit.
Insulating substrate is placed on the lower board of moulding press, and lower punching block is coordinated with insulating substrate by location hole, lower punching block
It is placed on thereon；High purity graphite fine powder (the grain of graphite fine powder is uniformly filled in the graphite-filled slot of lower punching block
Degree is adjusted according to the specific requirement of product), upper punching block is assemblied on the upper board of moulding press, is utilized between upper punching block and lower punching block
Positioning guide column coordinates；Moulding press works, and upper punching block vertical drop compresses the graphite powder in the graphite-filled slot of lower punching block, and pressure can be with
It is adjusted according to the specific requirement of product and (is generally set to 25MPa), keep pressure 20 seconds or more；After pressure relief, insulation
It is formed with the serpentine graphite planar coil for meeting intensity requirement on substrate.
Embodiment two：Screen printing technique makes graphite plane coil pulse transformer.
It selects granularity to be less than the pure graphite powder of 2000 purposes, it is standby to be modulated into viscosity body of paste appropriate with suitable adhesive
With；Corresponding web plate is made according to the specification of each layer line circle；Using the web plate made, the printing making stone on insulating substrate
Black planar coil, after drying technique makes the adhesive curing in lotion, one layer of insulating substrate of superposition carries out next layer of print again
Brush makes；The qualified through-hole of design, the via and a upper procedure are reserved on the insulating substrate being superimposed afterwards in position
The graphite coil to complete communicates, and via is filled up with oildag while printed book layer line circle, make this layer line circle with together
The graphite coil connection that process completes, after being completed for printing after stoving process makes the adhesive curing in lotion, superposition one
The printing that layer insulating substrate carries out next layer again, which makes ... recycles according to this until entire coil completes.
Embodiment three：Coated technique makes graphite plane coil pulse transformer.
It selects granularity to be less than the pure graphite powder of 2000 purposes, it is standby to be modulated into viscosity body of paste appropriate with suitable adhesive
With；Go out the suitable groove of depth according to the dimensioned of this layer line circle on insulating substrate, the viscosity modulated is appropriate
Oildag is coated in groove, is dried after shake table vibrates process, and one layer of prefabricated line is superimposed after the drying of this layer line circle
The printing that the insulating substrate of circle groove carries out next layer again makes, and is reserved with and sets in position on the insulating substrate being superimposed afterwards
Qualified through-hole is counted, which communicates with the graphite coil that a upper procedure completes, used while applying this layer line circle
Oildag fills up via, this layer line circle is made to be connected to the graphite coil that a procedure completes, through drying work after coating completion
After skill makes the adhesive curing in lotion, the coating that one layer of insulating substrate of superposition carries out next layer again makes ..., and cycle is straight according to this
It completes to entire coil.
Claims (3)
1. graphite coil planar pulse transformer, it is characterized in that：Conventional planar transformer is substituted as conductor using graphite material
Copper conductor, using mould pressing process, screen printing technique or coated technique substitute multilayer circuit board manufacture craft, in insulating substrate
On produce graphite plane spiral winding and via, effectively reduce material cost while, manufacturing cost is greatly reduced；
The graphite material is that purity reaches 99.5% or more, and granularity is less than the Conventional graphite material of 2000 mesh；
The coated technique specifically includes：Granularity is selected to be less than the pure graphite powder of 2000 purposes as the graphite material, with appropriate
Adhesive be modulated into viscosity oildag appropriate, it is suitable according to the dimensioned of this layer line circle to go out depth on insulating substrate
Groove, the oildag is coated in groove, through shake table vibrate process after dried, this layer line circle drying after be superimposed
The printing that the insulating substrate of one layer of prefabricated coil groove carries out next layer again makes, appropriate on the insulating substrate being superimposed afterwards
Position is reserved with the qualified through-hole of design, which communicates with the graphite coil that a upper procedure completes, and is applying this layer
Via is filled up with oildag while coil, so that this layer line circle is connected to the graphite coil that a procedure completes, is coated
After after stoving process makes the adhesive curing in lotion, the coating that one layer of insulating substrate of superposition carries out next layer again makes,
Cycle is until entire coil completes according to this；
The mould pressing process specifically includes：Corresponding upper punching block and lower punching block are made according to the shape and size of planar coil, on
Punching block is formpiston, and lower punching block is former；The graphite-filled slot of lower punching block is consistent with the spiral planar coil for work of drawing up, upper punching block
With the graphite-filled slot precision-fit of lower punching block；Insulating substrate is placed on the lower board of moulding press, lower punching block and insulating substrate
Coordinated by location hole, lower punching block is placed on thereon；High-purity is uniformly filled in the graphite-filled slot of lower punching block
Graphite fine powder is adjusted as the graphite material, the granularity of the graphite fine powder according to the specific requirement of product, upper punching block assembly
On the upper board of moulding press, coordinated using positioning guide column between upper punching block and lower punching block；Moulding press works, under upper punching block is vertical
The graphite fine powder compressed in the lower graphite-filled slot of punching block is fallen, pressure can be adjusted according to the specific requirement of product, usually set
It is scheduled on 25MPa, keeps pressure 20 seconds or more；After pressure relief, the spiral shape for meeting intensity requirement is formed on insulating substrate
Graphite plane coil.
2. graphite coil planar pulse transformer described in accordance with the claim 1, it is characterized in that：The screen printing technique is specific
Including：Corresponding web plate is made according to the specification and size of each layer line circle；Using the web plate made, printed on insulating substrate
Brush makes graphite plane coil, and after drying technique makes the adhesive curing in lotion, one layer of insulating substrate of superposition carries out down again
One layer of printing makes；Be reserved with the qualified through-hole of design on the insulating substrate being superimposed afterwards in position, the via with it is upper
The graphite coil that one procedure completes communicates, and fills up via with oildag while printed book layer line circle, makes this layer line
Circle is connected to the graphite coil that a procedure completes, and the adhesive curing in lotion is made through stoving process after being completed for printing
Afterwards, it is superimposed the printing making that one layer of insulating substrate carries out next layer again, cycle is until entire coil completes according to this.
3. graphite coil planar pulse transformer described in accordance with the claim 1, it is characterized in that：Stone is produced on insulating substrate
Black planar spiral winding and via synchronously complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310095423.1A CN104064336B (en) | 2013-03-22 | 2013-03-22 | graphite coil planar pulse transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310095423.1A CN104064336B (en) | 2013-03-22 | 2013-03-22 | graphite coil planar pulse transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104064336A CN104064336A (en) | 2014-09-24 |
| CN104064336B true CN104064336B (en) | 2018-08-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310095423.1A Active CN104064336B (en) | 2013-03-22 | 2013-03-22 | graphite coil planar pulse transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN104064336B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105703164A (en) * | 2014-12-04 | 2016-06-22 | 深圳市高瓴科技有限公司 | Mobile phone charging line with invisible charger |
| CN105655104B (en) * | 2016-03-25 | 2018-05-08 | 江苏苏净集团有限公司 | A kind of snail electromagnetic coil |
| CN107123521A (en) * | 2017-06-16 | 2017-09-01 | 深圳三马电器有限公司 | Power transformer based on graphene wire |
| CN112992476B (en) * | 2021-02-05 | 2022-08-12 | 合肥矽力杰半导体技术有限公司 | Transformer, and package module |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4117878C2 (en) * | 1990-05-31 | 1996-09-26 | Toshiba Kawasaki Kk | Planar magnetic element |
| JPH0613247A (en) * | 1992-06-26 | 1994-01-21 | Fujitsu Ltd | Winding for planar transformer |
| US6054914A (en) * | 1998-07-06 | 2000-04-25 | Midcom, Inc. | Multi-layer transformer having electrical connection in a magnetic core |
| JP3485485B2 (en) * | 1998-12-28 | 2004-01-13 | 住友特殊金属株式会社 | Powder pressing device, punch and powder pressing method |
| CN1137610C (en) * | 2001-08-03 | 2004-02-04 | 深圳市美加电子有限公司 | Connection method for printing insulating layer of laminated electronic device |
| CN101408559B (en) * | 2008-11-21 | 2011-03-30 | 北京航天时代光电科技有限公司 | Method for preparing sensitive coil of reflection type optical fiber current sensor |
| WO2012038786A1 (en) * | 2010-09-23 | 2012-03-29 | Indian Institute Of Technology Kanpur | Carbon nanofiber/carbon nanocoil - coated substrate and nanocomposites |
| CN202034834U (en) * | 2011-04-26 | 2011-11-09 | 张泽宇 | Electric motor |
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2013
- 2013-03-22 CN CN201310095423.1A patent/CN104064336B/en active Active
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| CN104064336A (en) | 2014-09-24 |
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Effective date of registration: 20160308 Address after: 518000 Tsinghua Research Institute, Nanshan District science and Technology Park, Shenzhen, Guangdong C310 Applicant after: GAOWU ELECTROMAGNETIC TECHNOLOGY (SHENZHEN) Co.,Ltd. Address before: 65, 243 little North Road, 510060, Guangdong Province, Guangzhou Applicant before: Wang Yong |
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Address after: 518000, Guangdong Province, Shenzhen Futian District Meilin Street East Lin Yuan new pavilion District 8, 1607 Applicant after: High house technology (Shenzhen) Co.,Ltd. Address before: 518000 Tsinghua Research Institute, Nanshan District science and Technology Park, Shenzhen, Guangdong C310 Applicant before: GAOWU ELECTROMAGNETIC TECHNOLOGY (SHENZHEN) Co.,Ltd. |
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Address after: 518000 1507, building 8, Xinge community, No. 9, Linyuan East Road, Xinge community, Meilin street, Futian District, Shenzhen, Guangdong Province Patentee after: Mobil Technology (Shenzhen) Co.,Ltd. Address before: 518000 518, No. 3, Bayao Second Street, West Ring Road, Fenghuang community, Buji street, Longgang District, Shenzhen, Guangdong Province Patentee before: Takaya Xiling Technology (Shenzhen) Co.,Ltd. Address after: 518000 518, No. 3, Bayao Second Street, West Ring Road, Fenghuang community, Buji street, Longgang District, Shenzhen, Guangdong Province Patentee after: Takaya Xiling Technology (Shenzhen) Co.,Ltd. Address before: 518000 room 1607, building 8, Xinge community, Linyuan East Road, Meilin street, Futian District, Shenzhen City, Guangdong Province Patentee before: High house technology (Shenzhen) Co.,Ltd. |