CN106208408B - Wireless charging receiving coil and preparation method thereof - Google Patents
Wireless charging receiving coil and preparation method thereof Download PDFInfo
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- CN106208408B CN106208408B CN201610821072.1A CN201610821072A CN106208408B CN 106208408 B CN106208408 B CN 106208408B CN 201610821072 A CN201610821072 A CN 201610821072A CN 106208408 B CN106208408 B CN 106208408B
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
- H01F2027/2809—Printed windings on stacked layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
- H01F2038/143—Inductive couplings for signals
-
- H02J7/025—
Abstract
The invention discloses a kind of wireless charging receiving coils and preparation method thereof.The wireless charging receiving coil includes flexible substrates and layer flexible coil plate, the layer flexible coil plate includes alternately stacked multiple conductor wire ring layers and multiple insulating layers, wherein first conductor wire ring layer is set in the one side of the flexible substrates, first insulating layer is set in first conductor wire ring layer, via hole is additionally provided in each insulating layer simultaneously, conductive material is filled in the via hole, the conductive coil in multiple conductor wire ring layers to be serially connected and/or in parallel form Wireless charging coil, and make conductive coil current trend having the same in multiple conductor wire ring layers.Wireless charging receiving coil provided by the invention has many advantages, such as ultra-thin, flexible, microminiature, high quality factor, and electric energy reception ability is strong, complies fully with Qi standard, can be applied in portable, wearable device.
Description
Technical field
Present invention relates particularly to a kind of wireless charging receiving coils and preparation method thereof, belong to wireless charging technical field.
Background technique
With the development of nanofabrication technique and ultra-large type integrated circuit (VLSI) technology, electronic component and control chip
Size is smaller and smaller, develops electronic product towards small-sized, portable, integrated and wearable direction.Electronic product is wanted at present
Integration is asked, it is totally-enclosed, also need to improve the life and reliability of product while water proof and dust proof, this electron product fills
Electric process proposes inside the electronic products such as challenge, such as mobile phone, tablet computer (PDA) containing rechargeable battery (such as lithium electricity
Pond), the charging of electron interiors of products battery need to generally reserve charging interface on it, thus be difficult to totally-enclosed.
Wireless charging technology (Wireless Charging Technology) is a kind of contactless electric energy transmission technology,
It can solve the above problems very well, industry has also formed wireless charging alliance (WPC) at present, and has developed related wireless charging
Electric standard (Qi), wireless charging receiving coil are the important component of radio energy receiving device again, and the quality of performance is straight
Connect the efficiency and quality for influencing wireless power transmission.In the prior art, wireless charging receiving coil is usually by copper conductor coiling
It forms, is wireless charging receiving coil to be printed in PCB circuit board, but wireless charging obtained receives there are also some researchs
Coil is all rigid, and area is larger, is difficult to be integrated into portable, wearable device.
Summary of the invention
The main purpose of the present invention is to provide a kind of wireless charging receiving coils and preparation method thereof, to overcome existing skill
Deficiency in art.
For realization aforementioned invention purpose, the technical solution adopted by the present invention includes:
The embodiment of the invention provides a kind of wireless charging receiving coils comprising:
Flexible substrates, including first surface and with the opposite facing second surface of first surface；
And layer flexible coil plate, including alternately stacked (n+1) a conductor wire ring layer and n insulating layer, wherein the
One conductor wire ring layer is set to the first surface of the flexible substrates, and first insulating layer is set to first conductor wire ring layer
On, (n+1) a conductor wire ring layer is arranged on n-th of insulating layer, and n is positive integer, and each conductor wire ring layer
Comprising more than one conductive coil, while via hole, the mistake are additionally provided in n insulating layer or n insulating layer and flexible substrates
Conductive material is filled in hole, the conductive coil in (n+1) a conductor wire ring layer to be serially connected and/or formation nothing in parallel
Line charge electric coil, and make the conductive coil current trend having the same in (n+1) a conductor wire ring layer.
In some more preferred embodiments, the corresponding conductive coil in (n+1) a conductor wire ring layer is mutually right
Together.
In some more preferred embodiments, any conductor wire ring layer and an insulation adjacent with the conductor wire ring layer
The sum of thickness of layer is 5 μm~50 μm.
In some more preferred embodiments, the sum of thickness of (n+1) a conductor wire ring layer and n insulating layer is 15
μm~200 μm.
In some more preferred embodiments, the conductive material being filled in the via hole is by being printed on the insulation
The part in electrocondution slurry or conductive ink on layer is formed through sintering curing again after entering via hole.
The embodiment of the invention also provides a kind of methods for preparing the wireless charging receiving coil comprising following step
It is rapid:
(1) provide flexible substrates, the flexible substrates include first surface and with the opposite facing second surface of first surface；
(2) printed conductive ink or electrocondution slurry on the first surface of the flexible substrates are formed after sintering curing
First conductor wire ring layer；
(3) via hole is processed on first insulating layer, and first insulating layer is covered in first conductor wire ring layer
On；
(4) printed conductive ink or electrocondution slurry on first insulating layer, and make part of conductive ink or conduction
Slurry enters the via hole, solidification is sintered to the conductive ink or electrocondution slurry later, in shape on first insulating layer
At second conductor wire ring layer, it is formed simultaneously the conductive material for filling the via hole；
(5) operation of step (3)~step (4) is repeated, until forming layer flexible coil plate, the layer flexible coil
Plate includes alternately stacked (n+1) a conductor wire ring layer and n insulating layer, and (n+1) a conductor wire ring layer setting is exhausted at n-th
In edge layer, n is positive integer, and each conductor wire ring layer includes more than one conductive coil, meanwhile, it is filled in n insulation
Conductive material in the via hole of layer is also serially connected the conductive coil in (n+1) a conductor wire ring layer and/or parallel connection forms nothing
Line charge electric coil, and make the conductive coil current trend having the same in (n+1) a conductor wire ring layer.
Compared with prior art, wireless charging receiving coil provided by the invention has ultra-thin, flexible, microminiature, Gao Pin
The advantages that prime factor, and electric energy reception ability is stronger, complies fully with Qi standard, can be applied to portable, wearable device electronics
In product.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in invention, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of schematic diagram of the wireless charging receiving coil of 4 layers of cascaded structure in the embodiment of the present invention 1；
Fig. 2 is a kind of cross section structure figure of wireless charging receiving coil in the embodiment of the present invention 1；
Fig. 3 is a kind of plane structure chart of wireless charging receiving coil in the embodiment of the present invention 1；
Fig. 4 is a kind of schematic diagram of the wireless charging receiving coil of 4 layers of structure in the embodiment of the present invention 2, wherein upper two layers
Parallel connection, lower two layers in parallel, then upper and lower level is carried out concatenated structure chart；
Fig. 5 is a kind of plane structure chart of wireless charging receiving coil in the embodiment of the present invention 2.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, with reference to the accompanying drawing to specific reality of the invention
The mode of applying is described in detail.The example of these preferred embodiments is illustrated in the accompanying drawings.Shown in attached drawing and according to
The embodiments of the present invention of attached drawing description are only exemplary, and the present invention is not limited to these embodiments.
Here, it should also be noted that, in order to avoid having obscured the present invention because of unnecessary details, in the accompanying drawings only
Show with closely related structure and/or processing step according to the solution of the present invention, and be omitted little with relationship of the present invention
Other details.
A kind of wireless charging receiving coil that the one aspect of the embodiment of the present application provides includes:
Flexible substrates, including first surface and with the opposite facing second surface of first surface；
Layer flexible coil plate, including alternately stacked (n+1) a conductor wire ring layer and n insulating layer, wherein first
Conductor wire ring layer is set to the first surface of the flexible substrates, and first insulating layer is set in first conductor wire ring layer,
(n+1) a conductor wire ring layer is arranged on n-th of insulating layer, and n is positive integer, and each conductor wire ring layer includes
More than one conductive coil, while via hole is additionally provided in n insulating layer or n insulating layer and flexible substrates, in the via hole
Filled with conductive material, the conductive coil in (n+1) a conductor wire ring layer to be serially connected and/or in parallel form wireless charging
Electric coil, and make the conductive coil current trend having the same in (n+1) a conductor wire ring layer.
Wherein, the conductive coil being in parallel coil having the same is moved towards around rotation, and inner end is electrically connected with inner end, outer end
It is electrically connected with outer end.
More specifically, in some embodiments, each conductive coil coiling direction having the same parallel with one another, and
And the inner end of each conductive coil parallel with one another is electrically connected to each other, outer end is also electrically connected to each other, wherein the volume of each conductive coil
The inside of conductive coil is distributed in as the inner end around beginning and winding any one of terminal, and another one is distributed in conduction
The outside of coil is as the outer end.
Wherein, the conductive coil inner end being connected in series is electrically connected with inner end or outer end is electrically connected with outer end, inner end and inner end electricity
One of coil ecto-entad is around rotation when connection, after electric connecting terminal along identical around rotation direction from inside to outside around rotation,
One of coil is from inside to outside around rotation when outer end is electrically connected with outer end, after electric connecting terminal along it is identical around rotation direction by
Outside to inside around rotation.
More specifically, in some embodiments, the inner end for the two neighboring conductive coil being one another in series mutually is electrically connected
It connects or outer end is electrically connected to each other, the winding beginning of one of conductive coil is distributed in the inside of conductive coil as described interior
End, winding terminal is distributed in the outside of conductive coil as the outer end, and the winding terminal of another conductive coil is distributed
In the inside of conductive coil as the inner end, winds beginning and be distributed in the outside of conductive coil as the outer end.
More preferred, the corresponding conductive coil in (n+1) a conductor wire ring layer is mutually aligned.
In some more specific embodiments, a kind of wireless charging receiving coil has multilayered structure, the number of plies n, n
> 2, lowest level is flexible substrates, be followed successively by upwards first conductor wire ring layer, first insulating layer, second conductor wire ring layer,
Second insulating layer ... is separated up between n-th of conductor wire ring layer, each conductor wire ring layer with insulating layer, forms conductive coil
The multilayered structure of layer and insulating layer intersecting；Each conductor wire ring layer consistency from top to bottom of intersecting, each layer fit to form multilayer
Flexible wires girth sheets is electrically connected in series or in parallel between the conducting wire of different conductor wire ring layers, and being formed has wiring
The Wireless charging coil of terminal.Wherein, it may be provided with via hole on the flexible substrates and insulating layer, fill conductive material in via hole
For the electrical connection between different conductor wire ring layers.
Further, the wireless charging receiving coil coil wire spacing is 0.1mm~1mm, also that is, each conductor wire
The distance between adjacent two circles coil is 0.1mm~1mm in circle.
Further, the cross-sectional length of the conducting wire to constitute the conductive coil is 0.2mm~1mm.
Further, the cross-sectional width (namely conductor thickness) to constitute the conducting wire of the conductive coil is 3 μm~35 μ
m。
Further, the conducting wire to constitute the conductive coil includes the first conductive layer.
Further, first conductive layer can by the electrocondution slurry that is printed on the flexible substrates or insulating layer or
Conductive ink sintering curing is formed.
Preferably, first conductive layer with a thickness of 1 μm~2 μm.
Further, the conducting wire to constitute the conductive coil further includes folded the second conduction being located on the first conductive layer
Layer.
Further, second conductive layer includes the electroplated layer for being formed in the first conductive layer；Preferably, the electroplated layer
Including copper plate.
Preferably, the second conductive layer with a thickness of 2 μm~25 μm.
In some embodiments, an infrastructure layer of the wireless charging receiving coil with a thickness of any conduction
The sum of coil layer and the thickness of an insulating layer adjacent with the conductor wire ring layer are 5 μm~50 μm.
In some embodiments, multiple infrastructure layers of the wireless charging receiving coil is a with a thickness of (n+1)
The sum of thickness of conductor wire ring layer and n insulating layer is 15 μm~200 μm.
In some more preferred embodiments, the conductive material being filled in the via hole is by being printed on the insulation
The part in electrocondution slurry or conductive ink on layer is formed through sintering curing again after entering via hole.
Further, the diameter of the via hole is preferably 0.3mm~1mm.
Further, the shape of the via hole includes rule or the irregular shapes such as round, square or regular hexagon.
In some embodiments, the flexible substrates or insulating layer can be used insulation flexible thin-film material, such as can be with
For made of polyester material (PET/PEN), person's polyimide material (PI), polyethylene (PE), polyvinyl chloride (PVC), nylon etc.
Fexible film can also use paper, leather flexible material, and without being limited thereto.
Further, the thickness of the flexible substrates is preferably 2 μm~23 μm.
Further, the thickness of the insulating layer is preferably 2 μm~23 μm.
In some embodiments, there are two connecting terminals for the Wireless charging coil tool.
Further, the connecting terminal is distributed in the outside of the wireless charging receiving coil, for electric with load end
Connection.
Further, the connecting terminal can be selected from the circular vias filled with conductive material, or also selected from circle
Shape pad or square pads.
Further, the diameter of the circular vias is preferably 0.3mm~1mm.
Further, the diameter of the circular pad is preferably 0.3mm~1mm.
Further, the side length of the square pads is preferably 0.3mm~1mm.
Further, the wireless charging receiving coil utilize ultra-thin insulating layer and multilayered structure, number of plies n, n > 2,
The ability of reception electric energy is about n times of the wireless charging receiving coil of single layer structure, therefore can design the wireless charging of small size
Electric receiving coil, such as four-layer structure can design the wireless charging receiving coil that length and width is respectively smaller than 2cm and 1.5cm, and
And meet Qi standard.
The embodiment of the invention also provides a kind of methods for preparing the wireless charging receiving coil comprising following step
It is rapid:
(1) provide flexible substrates, the flexible substrates include first surface and with the opposite facing second surface of first surface；
(2) printed conductive ink or electrocondution slurry on the first surface of the flexible substrates are formed after sintering curing
First conductor wire ring layer；
(3) via hole is processed on first insulating layer, and first insulating layer is covered in first conductor wire ring layer
On；
(4) printed conductive ink or electrocondution slurry on first insulating layer, and make part of conductive ink or conduction
Slurry enters the via hole, solidification is sintered to the conductive ink or electrocondution slurry later, in shape on first insulating layer
At second conductor wire ring layer, it is formed simultaneously the conductive material for filling the via hole；
(5) operation of step (3)~step (4) is repeated, until forming layer flexible coil plate, the layer flexible coil
Plate includes alternately stacked (n+1) a conductor wire ring layer and n insulating layer, and (n+1) a conductor wire ring layer setting is exhausted at n-th
In edge layer, n is positive integer, and each conductor wire ring layer includes more than one conductive coil, meanwhile, it is filled in n insulation
Conductive material in the via hole of layer is also serially connected the conductive coil in (n+1) a conductor wire ring layer and/or parallel connection forms nothing
Line charge electric coil, and make the conductive coil current trend having the same in (n+1) a conductor wire ring layer.
Further, the conducting wire to constitute the conductive coil includes the first conductive layer, and first conductive layer is by printing
The conductive ink or electrocondution slurry brushed on first face of flexible substrates or the insulating layer are formed through sintering curing.
In some specific embodiments, the conductor wire ring layer is prepared using printed electronics, first with leading
Electric ink or electrocondution slurry etc. print out required conductive coil pattern, print thickness on the first face of flexible substrates or insulating layer
It is 1 μm~2 μm, is then sintered solidification.
Wherein, the insulating layer has opposite facing first face and the second face, second face and the flexible base layer
The first face it is opposite facing.
Further, the conducting wire to constitute the conductive coil further includes the second conductive layer, and second conductive layer is
The coat of metal being formed on first conductive layer.
In some specific embodiments, in view of the conductive coil resistance printed out using electrocondution slurry or conductive ink compared with
Greatly, in order to reduce line resistance, the copper facing of 2 μm~25 μ m-thicks can be formed on conductive coil pattern by being electroplated.
Aforesaid conductive slurry or conductive ink can mainly by conductive metallic material and/or carbon material micron particles and/or
Nano particle is scattered in organic solvent and is formed.
Wherein, the metal material can be selected from any one in silver, copper, gold, nickel or aluminium, but not limited to this.
Wherein, the carbon material can be selected from carbon nanotube, graphene, micron carbon particle or nano carbon particle, but be not limited to
This.
For example, being suitable for the invention electrocondution slurry can be the silver paste that industry commonly uses, copper slurry, Lyu's slurry, gold paste etc..
Wherein, the mode of aforementioned printing include silk-screen printing, ink jet printing, intaglio printing, letterpress, trans-printing,
Any one in aerosol printing or two or more combinations, but not limited to this.
Wherein, sintering curing mode above-mentioned include heat cure sintering, photon sintering, microwave sintering, in plasma agglomeration
Any one or two or more combinations, but not limited to this.
Printing above-mentioned, sintering curing can be used any suitable method known to industry and carry out.
In some embodiments, in abovementioned steps (2), via hole can also be processed in the flexible substrates.
It in some embodiments, can be using laser boring mode in the insulating layer or flexible substrates and insulating layer
On process the via hole.For example, can form circular vias using laser boring, via diameter is 0.3mm~1mm.
It is possible to further which electrocondution slurry or conductive ink are filled into the mistake while printing conductive coil figure
Kong Zhong is sintered solidification later, forms the conductive material of filling via hole.
Wireless charging receiving coil of the invention includes flexible base layer, conductor wire ring layer, flexible insulating layer, flexible substrates
Conductive interconnection channel on layer and insulating layer, winding wiring.The conductive coil and insulating layer intersecting, different layers are led
Electric coil is electrically connected in series or in parallel using conductive channel, and ultimately forming tool, there are two the multilayer wires of terminals
Circle.Coil in alignment on different layers, each layer line circle current trend having the same.The substrate and insulating layer are flexible thin membrane material
Material, thickness in monolayer are 2 μm~25 μm, also only 15~200 μm of the thickness of lattice coil, ultra-thin and can arbitrarily bend.Using
Multilayered structure and ultra-thin insulating layer make coil that there is higher quality factor, and the coil of small size is made also to have biggish electricity
Ability can be received.
Wireless charging receiving coil of the invention, using ultra-thin insulating layer and multilayered structure, number of plies n, n > 2 are received
The ability of electric energy is about n times of single layer structure, therefore can design the wireless charging receiving coil of small size, four-layer structure energy
The wireless charging receiving coil that length and width are respectively smaller than 2cm and 1.5cm is designed, and the wireless charging for meeting Qi standard receives line
Circle.
Below in conjunction with attached drawing and several embodiments the technical solution of the present invention is further explained explanation.
Embodiment 1
Referring to it is shown in fig. 1 be the embodiment of the present application 1 provide a kind of wireless charging receiving coil structure, the wireless charging
Electric receiving coil is 4 layers of cascaded structure, including 1 layer of conductor wire ring layer 11,3 of flexible insulating layer 10,4 of flexible substrates 104,3
12,2 terminals 131,132 of a via hole.Lowest level is the flexible substrates 104 as basal layer, is followed successively by first upwards and leads
113, second insulating layers 102 ... of the conductor wire ring layer of insulating layer 103, second of electric wire ring layer 114, first are until the 4th
Conductor wire ring layer 111 is separated with insulating layer 10 between adjacent conductive coil layer, forms conductor wire ring layer and insulating layer intersecting
Multilayered structure.
Wherein, the conductor wire ring layer of different layers trend having the same, concatenated first conductor wire after series connection
114 inner end 146 of ring layer is by the conductive material filled in the via hole 123 of first insulating layer 103 and second conductor wire ring layer
113 inner end 145 is electrically connected；Second 113 outer end 144 of conductor wire ring layer is by second 102 via hole 122 of insulating layer
The conductive material of filling and the outer end 142 of third conductor wire ring layer 112 are electrically connected；In third conductor wire ring layer 112
End 143 is by the conductive material of filling and the inner end 141 of the 4th conductor wire ring layer 111 in 101 via hole 121 of third insulating layer
It is electrically connected；And two neighboring conductor wire ring layer is contrary around revolving, when inner end is electrically connected with inner end, one of them
Conductor wire ring layer ecto-entad around rotation, after electric connecting terminal along identical around rotation direction from inside to outside around rotation, when outer end with
When outer end is electrically connected, wherein conductor wire ring layer is from inside to outside around rotation, after electric connecting terminal along identical around rotation direction by outer
Inwardly around rotation；After series connection in this way so that each conductor wire ring layer electric current having the same around to.
Wherein, flexible substrates 104 and flexible insulating layer 10 are the PET film of about 2 μ m-thicks.
In the preparation, conductor wire ring layer 11 can use the method for silk-screen printing to the wireless charging receiving coil of the present embodiment,
The conductive silver paste figure of 2 μ m-thicks first is printed out in the first face of basal layer or insulating layer, then is heated baking and curing, Zhi Houtong
The copper that plating mode forms one layer of 20 μ m-thick on silver wire circle is crossed, the method that the via hole 12 on each insulating layer uses laser drill
It is punched, the conductive silver paste inserted in through-hole in the insulating layer that adjacent conductor wire ring layer passes through interval is electrically connected, shape
It was inserted while with the charging of silver paste printing wireless by coil pattern using silver paste as conductive material at 4 layers of cascaded structure
In hole 12 and solidify.
The cross section structure figure of a kind of wireless charging receiving coil provided referring to fig. 2 for the embodiment of the present application 1 comprising 1
Layer 31,3 via hole 32 of conductor wire ring layer of flexible insulating layer 30,4 of flexible substrates 304,3.It each insulating layer 30 and each leads
31 intersecting of electric wire ring layer, and each 31 consistency from top to bottom of conductor wire ring layer being laminated, each layer fit to form layer flexible coil
Plate is electrically connected between the conductor wire ring layer of different layers using the cured conductive silver paste filled in via hole 32, and series connection is formed
Connection.
Aforementioned substrates layer and insulating layer are flexible thin-film material, and basal layer and the upward one side of each insulating layer are first
Face, downward one side are the second face, and each conductive coil circuit is arranged on the first face of the basal layer and insulating layer.
It is a kind of plane structure chart for wireless charging receiving coil that the embodiment of the present application 1 provides, coil referring to Fig. 3
The number of turns n is 9, and length 404 is 2cm, and width 403 is 1.5cm, and every layer conductor width 401 is 0.5mm, the spacing 402 of adjacent wires
For 0.2mm, the internal diameter of via hole 405 is 0.3mm, finally draws two terminals 406,407, which is that internal diameter is 0.5mm
Circular vias, and via hole in be filled with cured conductive silver paste.
A kind of wireless charging receiving coil that the embodiment of the present application 1 provides has 4 layers of flexible wireless charging receiving coil, whole
About 100 μm of body thickness, length is 2cm and width is 1.5cm, and it is 20uH that antifreeze plate self-induction, which is not added, and long 2cm, width are pasted on coil
After the antifreeze plate of 1.5cm self-induction be 27uH, with Qi standard in A5 type transmitting coil gathering 3.4mm when, mutual inductance 4uH, have compared with
High quality factor and radio energy receive ability, and can arbitrarily bend.
Embodiment 2
A kind of structure for wireless charging receiving coil that the embodiment of the present application 2 provides, the wireless charging are shown referring to fig. 4
Electric receiving coil is 4 layers of series and parallel structure, and wherein upper two layers 211,212 are in parallel, and lower two layers 213,214 are in parallel, so
It connects again with lower two layers for upper two layers afterwards, equally includes 1 layer of conductive coil of flexible insulating layer 20,4 of flexible substrates 204,3
Layer 21,5 via holes, 22,2 terminals 231,232.Lowest level is basal layer 204, is followed successively by first conductor wire ring layer upwards
214, first insulating layer 202 ... of conductor wire ring layer 213, second of insulating layer 203, second is until the 4th conductive coil
Layer 211 is separated with insulating layer 20 between adjacent conductive coil layer, forms the multilayer knot of conductive coil and insulating layer intersecting
Structure.The conductor wire ring layer of the different layers passes through current trend having the same after serial or parallel connection, first conductive coil
214 inner end 248 of layer are by the conductive material filled in first insulating layer, 203 via hole 225 and second conductor wire ring layer 213
Inner end 246 is electrically connected, meanwhile, first 214 outer end 247 of conductor wire ring layer is by first 203 via hole 224 of insulating layer
The conductive material of filling and the outer end 245 of second conductor wire ring layer 213 are electrically connected, and make first conductor wire ring layer and the
Two conductor wire ring layers are in parallel；212 inner end 244 of third conductor wire ring layer is by filling in 201 via hole 222 of third insulating layer
Conductive material and the inner end 242 of the 4th conductor wire ring layer 211 be electrically connected, meanwhile, outside third conductor wire ring layer 212
End 241 is by the conductive material of filling and the outer end 241 of the 4th conductor wire ring layer 211 in 201 via hole 221 of third insulating layer
It is electrically connected, keeps third conductor wire ring layer in parallel with the 4th conductor wire ring layer；Second 213 inner end of conductor wire ring layer
246 by the inner end 244 of the conductive material filled and third conductor wire ring layer 212 in second insulating layer, 202 via hole 223 into
Row electrical connection, makes first, second conductor wire ring layer connect with third, the 4th conductor wire ring layer；Meanwhile first, second
Conductor wire ring layer is identical around rotation direction, and third, the 4th conductor wire ring layer are identical around rotation direction, first, second conductive coil
Layer is contrary around revolving with third, the 4th conductor wire ring layer.The conductor wire ring layer of final different layers by serial or parallel connection it
Trend having the same afterwards, the coil being in parallel coil having the same is moved towards around rotation, and inner end is electrically connected with inner end, simultaneously
Outer end is electrically connected with outer end；Concatenated coil inner end is electrically connected with inner end or outer end is electrically connected with outer end, when inner end and inner end electricity
When connection, one of coil ecto-entad around rotation, after electric connecting terminal along identical around rotation direction from inside to outside around rotation,
When outer end is electrically connected with outer end, one of coil is from inside to outside around rotation, along identical around rotation side after electric connecting terminal
To ecto-entad around rotation；In this way in parallel or series after so that each layer conductive coil electric current having the same around to.
Wherein, flexible substrates 204 and flexible insulating layer 20 all can be the moon 2 μ m-thick PET film.
In the preparation, conductor wire ring layer 21 is the method with silk-screen printing to the wireless charging receiving coil of the present embodiment, first
The conductive silver paste figure of 2 μ m-thicks is printed out in the first face of substrate or insulating layer, then is heated baking and curing, passes through electricity later
It is plated in the copper that one layer of 10 μ m-thick is formed on silver wire circle, the via hole 22 on insulating layer is punched using the method for laser drill, phase
Adjacent conductor wire ring layer is electrically connected by inserting conductive silver paste in through-hole, is formed 4 layers of series and parallel structure, is printed with silver paste
While brush wireless charging receiving coil pattern, inserts in via hole 22 and solidify using silver paste as conductive material.
It is a kind of plane structure chart for wireless charging receiving coil that the embodiment of the present application 2 provides, coil referring to Fig. 5
The number of turns n is 7, and length 504 is 4cm, and width 503 is 3cm, and every layer conductor width 501 is 0.7mm, and the spacing 502 of adjacent wires is
0.2mm, the internal diameter of via hole 505 are 0.3mm, finally draw two terminals 506,507, which is that internal diameter is 0.5mm
Circular vias, and conductive silver paste is filled in via hole.
A kind of wireless charging receiving coil that the embodiment of the present application 2 provides has 4 layers of flexible wireless charging receiving coil, whole
About 60 μm of body thickness, only 4cm and width are 3cm to length, and it is 11uH that antifreeze plate self-induction, which is not added,；Long 4cm, width 3cm are pasted on coil
Antifreeze plate after, in self-induction 16uH, with Qi standard when A5 type transmitting coil gathering 3.4mm, mutual inductance 6.7uH, and have compared with
High quality factor and radio energy receive ability, and can arbitrarily bend.
Wireless charging receiving coil provided by the present application not only has wireless charging function, and also meeting has flexibility, can appoint
The requirement of meaning bending, being particularly suitable for can be with the wearable electronic product of body close contact.
It should be appreciated that the technical concepts and features of above-described embodiment only to illustrate the invention, its object is to allow be familiar with this
The personage of item technology cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all
Equivalent change or modification made by Spirit Essence according to the present invention, should be covered by the protection scope of the present invention.
Claims (27)
1. a kind of wireless charging receiving coil, characterized by comprising:
Flexible substrates comprising first surface and with the opposite facing second surface of first surface；And
Layer flexible coil plate comprising alternately stacked (n+1) a conductor wire ring layer and n insulating layer, wherein first is led
Electric wire ring layer is set to the first surface of the flexible substrates, and first insulating layer is set in first conductor wire ring layer, the
(n+1) a conductor wire ring layer is arranged on n-th of insulating layer, and n is positive integer, and each conductor wire ring layer includes more than one
Conductive coil, while via hole is additionally provided in n insulating layer or n insulating layer and flexible substrates, it is filled with and leads in the via hole
Electric material, to by the conductive coil in (n+1) a conductor wire ring layer be serially connected and/or it is in parallel form Wireless charging coil,
And make conductive coil current trend having the same in (n+1) a conductor wire ring layer, to constitute leading for the conductive coil
Line includes the first conductive layer, and first conductive layer is by the electrocondution slurry or conduction that are printed on the flexible substrates or insulating layer
The conductive material that ink sintering curing is formed, and is filled in the via hole is by being printed on the flexible substrates or insulating layer
Part in electrocondution slurry or conductive ink is formed through sintering curing again after entering via hole；
Wherein, the flexible substrates or insulating layer with a thickness of 2 μm~23 μm, (n+1) a conductor wire ring layer and n insulation
The sum of thickness of layer is 15 μm~200 μm.
2. wireless charging receiving coil according to claim 1, it is characterised in that:
Each conductive coil coiling direction having the same parallel with one another, and the inner end of each conductive coil parallel with one another is mutual
Electrical connection, outer end are also electrically connected to each other, wherein any one of the winding beginning of each conductive coil and winding terminal are distributed in
Inner end of the inside of conductive coil as the conductive coil, another one are distributed in the outside of conductive coil as the conductive coil
Outer end；
Alternatively, the inner end for the two neighboring conductive coil being one another in series is electrically connected to each other or outer end is electrically connected to each other, one of them
The winding beginning of conductive coil is distributed in inner end of the inside of conductive coil as a conductive coil, and winding terminal is distributed in
Outer end of the outside of conductive coil as a conductive coil, and the winding terminal of another conductive coil is distributed in conductor wire
Inner end of the inside of circle as another conductive coil, winding beginning is distributed in the outside of conductive coil, and as this, another is led
The outer end of electric coil.
3. wireless charging receiving coil according to claim 1, it is characterised in that: the phase in (n+1) a conductor wire ring layer
Conductive coil is answered mutually to be aligned.
4. wireless charging receiving coil according to claim 1, it is characterised in that: adjacent two circles line in the conductive coil
The distance between circle is 0.1mm~1mm.
5. wireless charging receiving coil according to claim 1, it is characterised in that: to constitute leading for the conductive coil
The cross-sectional length of line is 0.2mm~1mm, and cross-sectional width is 3 μm~35 μm.
6. wireless charging receiving coil according to claim 1, it is characterised in that: first conductive layer with a thickness of 1 μ
M~2 μm.
7. wireless charging receiving coil according to claim 1 or 6, it is characterised in that: to constitute the conductive coil
Conducting wire further include folded the second conductive layer being located on the first conductive layer, the second conductive layer with a thickness of 2 μm~25 μm.
8. wireless charging receiving coil according to claim 7, it is characterised in that: second conductive layer includes being formed in
The electroplated layer of first conductive layer.
9. wireless charging receiving coil according to claim 8, it is characterised in that: the electroplated layer includes copper plate.
10. wireless charging receiving coil according to claim 1, it is characterised in that: the electrocondution slurry or conductive ink
Mainly organic solvent is scattered in by the micron particles and/or nano particle of conductive metallic material and/or carbon material to be formed；Wherein,
The metal material is at least selected from silver, copper, gold, nickel or aluminium, and the carbon material is at least selected from carbon nanotube, graphene, micron carbon
Particle or nano carbon particle.
11. wireless charging receiving coil according to claim 1, it is characterised in that: the mode of the printing includes silk screen
Printing, ink jet printing, intaglio printing, letterpress, trans-printing, any one or two or more groups in aerosol printing
It closes.
12. wireless charging receiving coil according to claim 1, it is characterised in that: the sintering curing mode wherein used
Including any one or the two or more combinations in heat cure sintering, photon sintering, microwave sintering, plasma agglomeration.
13. wireless charging receiving coil according to claim 1, it is characterised in that: the diameter of the via hole be 0.3mm~
1mm。
14. wireless charging receiving coil according to claim 1, it is characterised in that: the shape of the via hole include it is round,
Square or regular hexagon.
15. wireless charging receiving coil according to claim 1, it is characterised in that: the flexible substrates or insulating layer
Material includes polyester material, polyimide material, polyethylene, polyvinyl chloride, nylon, paper or leather.
16. wireless charging receiving coil according to claim 1, it is characterised in that: the flexible substrates or insulating layer are
Fexible film.
17. wireless charging receiving coil according to claim 1, it is characterised in that: the Wireless charging coil has two
A connecting terminal.
18. wireless charging receiving coil according to claim 17, it is characterised in that: the connecting terminal is distributed in described
The outside of wireless charging receiving coil, for being electrically connected with load end.
19. wireless charging receiving coil described in 7 or 18 according to claim 1, it is characterised in that: the connecting terminal is selected from and fills out
Circular vias filled with conductive material, the diameter of the circular vias are 0.3mm~1mm.
20. wireless charging receiving coil described in 7 or 18 according to claim 1, it is characterised in that: the connecting terminal is selected from circle
Shape pad or square pads, the diameter of the circular pad are 0.3mm~1mm, the side length of the square pads be 0.3mm~
1mm。
21. the preparation method of wireless charging receiving coil described in any one of claim 1-20, it is characterised in that including as follows
Step:
(1) provide flexible substrates, the flexible substrates include first surface and with the opposite facing second surface of first surface；
(2) printed conductive ink or electrocondution slurry on the first surface of the flexible substrates form first after sintering curing
A conductor wire ring layer；
(3) via hole is processed on first insulating layer, and first insulating layer is covered in first conductor wire ring layer；
(4) printed conductive ink or electrocondution slurry on first insulating layer, and make part of conductive ink or electrocondution slurry
Into the via hole, solidification is sintered to the conductive ink or electrocondution slurry later, in forming on first insulating layer
Two conductor wire ring layers are formed simultaneously the conductive material for filling the via hole；
(5) operation of step (3)~step (4) is repeated, until forming layer flexible coil plate, the layer flexible coil plate packet
Alternately stacked (n+1) a conductor wire ring layer and n insulating layer are included, (n+1) a conductor wire ring layer is arranged in n-th of insulating layer
On, n is positive integer, and each conductor wire ring layer includes more than one conductive coil, meanwhile, it is filled in the via hole of n insulating layer
Conductive material also by the conductive coil in (n+1) a conductor wire ring layer be serially connected and/or it is in parallel form Wireless charging coil,
And make conductive coil current trend having the same in (n+1) a conductor wire ring layer.
22. preparation method according to claim 21, it is characterised in that: the conducting wire to constitute the conductive coil includes
First conductive layer, first conductive layer is by the conductive ink that is printed on first face of flexible substrates or the insulating layer
Or electrocondution slurry is formed through sintering curing.
23. preparation method according to claim 22, it is characterised in that: the conducting wire to constitute the conductive coil also wraps
The second conductive layer is included, second conductive layer is the coat of metal being formed on first conductive layer.
24. the preparation method according to claim 21 or 22, it is characterised in that: the electrocondution slurry or conductive ink are main
Organic solvent is scattered in by the micron particles and/or nano particle of conductive metallic material and/or carbon material to be formed；Wherein, described
Metal material is at least selected from silver, copper, gold, nickel or aluminium, and the carbon material is at least selected from carbon nanotube, graphene, micron carbon particle
Or nano carbon particle.
25. the preparation method according to claim 21 or 22, it is characterised in that: the mode of the printing includes screen printing
Brush, ink jet printing, intaglio printing, letterpress, trans-printing, any one or two or more groups in aerosol printing
It closes.
26. the preparation method according to claim 21 or 22, it is characterised in that: the sintering curing mode wherein used includes
Heat cure sintering, photon sintering, microwave sintering, any one or two or more combinations in plasma agglomeration.
27. preparation method according to claim 21, characterized by comprising: using laser boring mode in the insulation
Via hole is processed in layer or the insulating layer and flexible substrates.
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| CN201610821072.1A CN106208408B (en) | 2016-09-13 | 2016-09-13 | Wireless charging receiving coil and preparation method thereof |
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| KR101808605B1 (en) * | 2016-12-22 | 2018-01-18 | 김재범 | Non-conductive frame coated with conductive layer transmitting the electormagnetic wave or having the function of heat radiation |
| CN106787234B (en) * | 2016-12-23 | 2023-09-22 | 深圳英伦科技股份有限公司 | Wireless charging capacitance type micro power supply and application thereof |
| KR20180089763A (en) * | 2017-02-01 | 2018-08-09 | 삼성전자주식회사 | Display system, wireless power transmitter and wireless power receiver |
| US20180268989A1 (en) * | 2017-03-16 | 2018-09-20 | Shenzhen Yichong Wireless Power Technology Co. Ltd. | Power receiver coil in wireless charging system |
| EP3385964B1 (en) | 2017-04-03 | 2019-10-02 | Ningbo Geely Automobile Research & Development Co. Ltd. | A device for a wireless power transfer system |
| EP3609040B1 (en) * | 2017-04-07 | 2022-08-24 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Wireless charging system, apparatus, method and device to be charged |
| CN106877529B (en) * | 2017-04-14 | 2019-06-28 | 京东方科技集团股份有限公司 | A kind of non-contact power receiving system and non-contact electric power sending device |
| CN107799900A (en) * | 2017-10-23 | 2018-03-13 | 苏州威斯东山电子技术有限公司 | A kind of three-dimensional type wireless charge coil |
| CN108417363B (en) * | 2018-02-10 | 2021-05-11 | 深圳大学 | Liquid metal wireless charging coil and preparation method thereof |
| CN109036803A (en) * | 2018-06-15 | 2018-12-18 | 上海安费诺永亿通讯电子有限公司 | Coil, wireless power transmitters and receivers, near-field communication device and electronic equipment |
| TWI706424B (en) * | 2018-06-27 | 2020-10-01 | 合利億股份有限公司 | Wireless charging coil |
| CN109087798B (en) * | 2018-07-26 | 2020-11-10 | 努比亚技术有限公司 | Wireless charging coil assembly |
| CN110880638A (en) * | 2018-09-06 | 2020-03-13 | 艾沛迪股份有限公司 | Method for manufacturing nano antenna device |
| CN109346313A (en) * | 2018-10-25 | 2019-02-15 | 华为技术有限公司 | A kind of Wireless charging coil mould group and its manufacturing method |
| CN109193961B (en) * | 2018-11-19 | 2024-04-05 | 苏州威斯东山电子技术有限公司 | A ultra-thin receiving terminal module of high efficiency for wireless charging |
| CN109686545B (en) * | 2019-02-26 | 2022-02-01 | 维沃移动通信有限公司 | Preparation method of charging coil, charging module of terminal equipment and terminal equipment |
| CN109921522A (en) * | 2019-03-07 | 2019-06-21 | 上海德门电子科技有限公司 | Coil device with wireless charging function |
| CN117833497A (en) * | 2022-09-29 | 2024-04-05 | 华为技术有限公司 | Charging coil module, related product thereof and preparation method of charging coil module |
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| CN102231313B (en) * | 2009-12-08 | 2014-04-16 | 上海华虹宏力半导体制造有限公司 | Multilayer stacked inductance utilizing parallel connection of metals |
| JP5900373B2 (en) * | 2013-02-15 | 2016-04-06 | 株式会社村田製作所 | Electronic components |
| CN104184217B (en) * | 2013-08-21 | 2016-08-10 | 深圳市安普盛科技有限公司 | Induction coil and manufacture method, wireless charging system for wireless power transmission |
| JP5991499B2 (en) * | 2013-10-29 | 2016-09-14 | 株式会社村田製作所 | Inductor array chip and DC-DC converter module using the same |
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