CN103200807A - Drilling sintering ferrite sheet, antenna isolation body and antenna module - Google Patents
Drilling sintering ferrite sheet, antenna isolation body and antenna module Download PDFInfo
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- CN103200807A CN103200807A CN2012100198704A CN201210019870A CN103200807A CN 103200807 A CN103200807 A CN 103200807A CN 2012100198704 A CN2012100198704 A CN 2012100198704A CN 201210019870 A CN201210019870 A CN 201210019870A CN 103200807 A CN103200807 A CN 103200807A
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- sheet material
- ferrite
- sintered body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
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Abstract
The invention provides a drilling sintering ferrite sheet, an antenna isolation body and an antenna module. The sintering ferrite sheet is provided with a plurality of holes and has the thickness of about 0.01mm to about 0.5mm. The drilling sintering ferrite sheet can keep high magnetic conductivity of the ferrite sheet and enable punching of the ferrite sheet to be easier.
Description
Technical field
The present invention relates to ferrite sheet material, antenna slider and Anneta module.More specifically, the ferrite sheet material that the present invention relates to hole, sandwich antenna slider, wherein said boring ferrite sheet material is the intermediate layer of this slider, also relates to the Anneta module that comprises described antenna slider.
Background technology
Under the background that increases rapidly in radio-frequency (RF) identification (RFID) market, near-field communication (NFC) technology is used for becoming more popular in the mobile phone use recently.This technology has been opened up a lot of new possibilities for mobile phone, for example, makes mobile phone have the function of electron key, ID card and Electronic Wallet, and makes it possible to finish the exchange of telephone number via radio channel with immediate mode and other people.
NFC is based on the 13.56MHz rfid system, and it uses magnetic field as carrier wave.Yet, when loop aerial during close to the lower surface of metal box, shielded box, circuit board or sheet surface such as battery case, may not obtain designed communication context.Because the vortex flow of inducting on the metal surface is set up magnetic field in the direction opposite with carrier wave, the decay of this carrier wave appears.Therefore, need to shield the material that has high magnetic permeability from the carrier wave of metal surface, (have formula: Ni as the Ni-Zn ferrite
aZn
(1-a)Fe
2O
4).
Japan Patent JP2005015293 discloses the ferrite sheet material that has diaphragm on a kind of surface thereon and adhesive tape is arranged at its lower surface.This ferrite sheet material has continuous U-shape or V-shape groove therein, and these U-shapes or V-shape groove intersect, so that sheet material is possible along cutting apart of described groove.And can be attached to this sheet material smooth or curved surface on.
Japan Patent JP2009182062 discloses a kind of preparation method who disconnects complicated ferrite sheet material.This ferrite sheet material comprises cover layer and bilateral adhesive layer.This ferrite sheet material have about below 300 microns thickness and form a plurality of grooves on surface of described sheet material.
Though the trough of belt slit can increase die-cut easy degree, they can reduce the magnetic permeability of ferrite sheet material.Therefore, desirable in the art is to obtain to have the magnetic permeability of raising and be easy to die-cut ferrite sheet material.
Summary of the invention
Therefore, one of purpose of the present invention provides a kind of ferrite sheet material, described ferrite sheet material have raising magnetic permeability, be easy to die-cut ability, and randomly, when existing external force to apply, provide rule to disconnect the ability of pattern.
At least a portion of above purpose can be by in the ferrite sintered body sheet material, having the aperture that gets out the described ferrite sheet material (being sometimes referred to as " boring ferrite sheet material " hereinafter) of array realize.
On the one hand, the invention provides a kind of ferrite sintered body sheet material, described ferrite sintered body sheet material has about 0.01mm to the thickness of about 0.5mm, and wherein said sheet material has a plurality of holes therein.
On the other hand, the invention provides a kind of antenna slider, described antenna slider comprises aforementioned ferrite sintered body sheet material disclosed by the invention; Diaphragm, described diaphragm are arranged on first side of described ferrite sintered body sheet material; Adhesive layer, described adhesive layer are arranged on second side of described ferrite sintered body sheet material; And alternatively, release layer, described release layer is arranged on the described adhesive layer.
Again on the other hand, the invention provides a kind of Anneta module of using in radio communication medium or the radio communication media processing apparatus of being adapted at.This Anneta module comprises aforementioned antenna slider disclosed by the invention, is arranged on the conducting loop-shaped antenna on first side of described antenna slider, and is arranged on the conductive layer on second side of described antenna slider.
In the present invention, the ferrite sintered body sheet material that has a plurality of holes therein, especially the ferrite sintered body sheet material when arranging a plurality of hole in the mode of pattern not only can keep the high magnetic permeability of antenna slider, and can be so that frangible ferrite sheet material is easier to die-cut.The pattern in these holes also can serve as the guiding that disconnects pattern for the rule when external force is applied to sheet material.This ferrite sintered body sheet material can be used for near-field communication (NFC) by flux path is set effectively between antenna circuit and metal box.This ferrite sheet material can reduce the eddy current losses when the NFC antenna approaches or is attached on the described metal box.
Description of drawings
Be used for explanation purpose of the present invention, but can't help that it limits, comprise the following drawings in this article, wherein:
Fig. 1 (a) is the schematic diagram of boring ferrite sheet material of the present invention;
Fig. 1 (b) is the schematic diagram that runs through (perforated) trough of belt (grooved) ferrite sheet material as a comparative example;
Fig. 2 (a) is the schematic diagram of magnetic resistance that has shown the boring ferrite sheet material of Fig. 1 (a);
Fig. 2 (b) is the schematic diagram that has shown the corresponding simulation magnetic resistance loop of boring ferrite sheet material;
Fig. 2 (c) is the schematic cross-section of boring ferrite sheet material, and its mesopore partly runs through along the thickness of described sheet material;
Fig. 2 (d) is the schematic diagram that has shown the simulation magnetic resistance loop of the boring ferrite sheet material shown in Fig. 2 (c);
Fig. 3 (a) is the schematic diagram that runs through the magnetic resistance in the trough of belt ferrite sheet material that has shown Fig. 1 (b);
Fig. 3 (b) is the schematic diagram that has shown the simulation magnetic resistance loop of running through trough of belt ferrite sheet material of Fig. 3 (a);
Fig. 3 (c) is the schematic diagram that runs through trough of belt ferrite sheet material, and wherein said groove partly runs through along the thickness of described sheet material;
Fig. 3 (d) is the schematic diagram that has shown the simulation magnetic resistance loop of running through trough of belt ferrite sheet material shown in Fig. 3 (c);
Fig. 4 (a) is the figure that has shown the die-cutting performance of boring ferrite sheet material sample of the present invention;
Fig. 4 (b) is the enlarged drawing that has shown the die-cutting performance of a sample shown in Fig. 4 (a);
Fig. 4 (c) has shown the wherein figure of the die-cutting performance of the sample of ferrite sheet material not with holes as a comparative example;
Fig. 4 (d) is the enlarged drawing that has shown the die-cutting performance of a sample shown in Fig. 4 (c);
Fig. 5 (a) be shown the boring ferrite sheet material that runs through fully and the effective permeability of the trough of belt ferrite sheet material that runs through fully as the schematic diagram of the function of the different area density of hole and groove;
Fig. 5 (b) is that the effective permeability of the trough of belt ferrite sheet material that shown that the 80% boring ferrite sheet material that runs through and 80% runs through is as the schematic diagram of the function of the different area density of hole and groove;
Fig. 5 (c) is that the effective permeability of the trough of belt ferrite sheet material that shown that the 60% boring ferrite sheet material that runs through and 60% runs through is as the schematic diagram of the function of the different area density of hole and groove;
Fig. 5 (d) is that the effective permeability of the trough of belt ferrite sheet material that shown that the 40% boring ferrite sheet material that runs through and 40% runs through is as the schematic diagram of the function of the different area density of hole and groove;
Fig. 6 comprises the effective permeability of the boring ferrite sheet material that runs through fully and 40% that run through, 60% that run through, 80% trough of belt ferrite sheet material that run through and that run through fully as the schematic diagram of the function of the different area density of hole and groove; And
Fig. 7 is the schematic diagram of antenna slider of the present invention.
Embodiment
Term " about " spreads all over this specification and uses and mean in the art under the rational tolerance approximate to exact value.
The example embodiment of boring ferrite sintered body sheet material of the present invention, antenna slider and Anneta module will be described respectively hereinafter.
A. the ferrite sintered body sheet material of holing
On the one hand, the invention discloses a kind of extremely ferrite sintered body sheet material of the thickness of about 0.5mm of about 0.01mm that has, wherein said sheet material has a plurality of holes therein.
In one embodiment, as shown in Fig. 1 (a) and Fig. 7, provide ferrite sintered body sheet material 10 and a plurality of hole 13 to be arranged in sheet material 10.A surface 11 (being called " end face ") of sheet material was bored in these holes 13.Alternatively, another surface 12 (be called " bottom surface ") opposite with upper surface 11 also can be bored in these holes.Ferrite sintered body sheet material 10 can be to run through fully by end face 11 and bottom surface 12,, passes the thickness of sheet material that is.
Usually, when ferrite sheet material during for the preparation of the antenna slider that can use in NFC, the ferrite sheet material that has greater than about 80 magnetic permeability is preferred.It is desirable being easy to die-cut ferrite sheet material, so that sheet material can be divided into given shape and big or small to satisfy a plurality of subsequent treatment.In the art, be difficult to realize simultaneously this two needs.Fortunately, the ferrite sintered body sheet material that proposes among the present invention can satisfy this two needs by the hole that is provided with special parameter as described below.
The magnetic permeability of boring ferrite sheet material is largely determined by the material of sheet material, the area density in hole and the degree of depth in hole.Simultaneously, the die-cutting performance of sheet material is largely determined by the size in each hole and the distance in two adjacent holes.The shape in hole will influence the formation of sheet material mesopore.Based on these factors, provide the more details about the hole below, with the ferrite sheet material of holing in optimization aspect magnetic permeability and die-cutting performance.
In one embodiment of the invention, the area density in hole is about 0.01% to about 60%.If all holes are to run through thickness by sheet material fully on the sheet material, the scope of the area density in hole is especially about 0.01% to about 15%, and more particularly about 0.01% to about 6%.As employed in this manual, the area density in hole means the ratio of area porose in the sheet material and the area of ferrite sheet material; Term " area " means hole or the sectional area of sheet material on the direction of the end face that is parallel to sheet material.Can think that the area of end face of sheet material is the area of ferrite sheet material.
In one embodiment of the invention, the cross sectional shape in each hole can be selected from the group that comprises the following on the direction of the end face that is parallel to sheet material, but is not limited to: circle, annular, rhombus, triangle, cross and rectangle.In one embodiment, circular cross-section may be preferred.Because the easier hole with this shape that gets out in sheet material.
In one embodiment of the invention, settle in the mode of straight line or curve pattern at least a portion hole, so that when can be along described straight line or curve segmentation ferrite sintered body sheet material when sheet material applies external force.
In one embodiment of the invention, the spacing in two adjacent holes, in other words, and the center to center distance between two adjacent holes, between about 4.0mm, for example, this spacing is about 2.0mm at about 0.5mm.If this spacing is too little, be not easy to prepare the hole based on existing drilling technique.If spacing is excessive, may there be die-cut problem.
In one embodiment of the invention, the sectional area in each hole can be about 100 μ m
2To about 9.6mm
2, especially about 100 μ m
2To about 3.7mm
2, and more particularly about 100 μ m
2To about 0.9mm
2Especially, this area is less than about 0.01mm
2
In one embodiment of the invention, in the sheet material degree of depth in each hole greater than about 50% of the thickness of ferrite sintered body sheet material.Alternatively, the degree of depth in each hole can equal the thickness of ferrite sintered body sheet material in the sheet material.In one embodiment, all holes have the identical degree of depth.In another embodiment, each hole has the degree of depth different with other holes, and perhaps a part of hole has the identical degree of depth.If the degree of depth in hole equals the thickness of ferrite sintered body sheet material, this hole is called as " hole of running through fully " or " is run through fully " by term in the present invention and limits.Except as otherwise noted, this hole also can " be run through " by term and limits.
In some embodiments of the present invention, the hole can be arranged with the form of array.In one embodiment of the invention, this array can be rectangular array or rhombus array.In another embodiment of the invention, settle in the mode of straight-line pattern at least a portion hole in the sheet material, becomes easier so that cut apart the ferrite sheet material along this line.If there are the needs along curve segmentation ferrite sheet material, this demand also can be settled to satisfy in the mode of curve pattern at least a portion hole.
In one embodiment of the invention, the ferrite sintered body sheet material can be formed by the oxide of Fe, the oxide of described Fe is by at least a doped with metal elements, and described metallic element is selected from the group of being made up of the following, but is not limited to: Ni, Zn, Cu, Co, Ni, Li, Mg and Mn.For example, ferrite can be selected from the group that comprises the following, but is not limited to: Ni-Zn-Cu ferrite, Mn-Zn-Cu ferrite and Mn-Mg-Cu ferrite.
All above parameters are leaked based on the minimum magnetic flux amount, and it is die-cut to keep the ferrite sintered body sheet material to be easy to simultaneously.
Below, provide more details for how preparing boring ferrite sintered body sheet material of the present invention.It is well-known how preparing the ferrite sintered body sheet material in the art.Therefore, the step that describes below is exemplary and should not limit the scope of this invention.
(1) ferrite powder powder composition
The main composition of ferrite powder can be (Ni
0.2Zn
0.5Cu
0.15) (Fe
2O
4)
0.97In addition, some additives can be comprised (Ni
0.2Zn
0.5Cu
0.15) (Fe
2O
4)
0.97The Bi of 0.3 weight %
2O
3, (Ni
0.2Zn
0.5Cu
0.15) (Fe
2O
4)
0.97The Co of 1 weight %
3O
4, (Ni
0.2Zn
0.5Cu
0.15) (Fe
2O
4)
0.97The Cr of 0.3 weight %
2O
3Be added to (Ni
0.2Zn
0.5Cu
0.15) (Fe
2O
4)
0.97In with the optimization magnetic property.These additives of different needs that depend in the practice are chosen wantonly.
Average particle size distribution based on D10 and D90 ferrite powder is 0.53 μ m to 2.38 μ m.
(2) ferrite serosity combination
Be preparation ferrite slurries, adding adhesive resin as shown in table 1, solvent and plasticizer.
Table 1
-adhesive resin: the polyvinyl butyral (CAS number: 63148-65-2, for example, available from supplier: KURARAYCO., LTD)
-plasticizer: two (2-ethylhexyl) esters of phthalic acid (CAS number: 117-81-7, for example, and available from supplier: LG CHEMICAL CO., LTD)
-solvent: toluene (CAS number: 108-88-3), ethanol (CAS number: 64-17-5, for example, and available from supplier: DAE-JUNG CHAMICAL CO., LTD)
-dispersant: the alkylammonium salt of poly--carboxylic acid (for example, available from supplier: HUNG SAN HWASUNG CO., LTD)
(3) preparation ferrite slurries
Use two-step method to mix with following condition described in the table 2.In case finish first mixed process, just be added to the component of batch of material B among the batch of material A and carry out second mixed process.Mix via the ball milling mixer with 6 liter capacities, and the diameter of the steel ball φ (phi) of mixer is about 10mm.
Table 2
(4) curtain coating (tape casting) of preparation ferrite green sheet
By using casting machine that the ferrite slurries are applied on the PET film that silicon applies and dry, to obtain to have the green sheet of 100 μ m thickness.The speed of painting slurry is about 2m/ minute, and baking temperature is about 60 ℃ to 80 ℃, and the dry duration is about 5 minutes.
(5) ferrite sintered
With the PET film after separating of green sheet from silicone coating, green sheet sintering in stove is used for burnouting the densification of adhesive and ferrite particle to obtain the ferrite sheet material.Sintering temperature is about 900 ℃ under air conditions, lasts 5 hours.
The thickness of ferrite sintered body sheet material can be about 0.1mm or other values.If the ferrite sintered body sheet material will use in radio communication medium or radio communication media processing apparatus, its thickness is 0.01mm to 0.5mm usually.
(6) boring
Laser can be used for the array at ferrite sintered body sheet material drilling bore hole.For example, the Firestar t-100 laser that derives from Synrad Inc. is one and selects and can its parameter of following setting: frequency, 10kHz; Energy level, 100%; Scanner speed, 400mm/s; Defocus ,+/-1mm; Optic path multiplexing (Trips), 4.
Alternatively, can be with hole drill in the ferrite green sheet, it is the intermediate product for the preparation of the ferrite sintered body sheet material, perhaps be drilled in the ferrite sintered body sheet material by other instruments, perhaps can by be suitable in ferrite or the ferrite green sheet in the additive method preparation of manufacturing hole.
As shown in Fig. 1 (a), for example, the cross sectional shape in hole is circular.The spacing L in per two adjacent holes
0Be about 2.0mm, shown in spacing be the centre distance in per two adjacent holes, and the L in each hole
1(being the diameter of circular hole) is about 115 μ m.In practice, spacing L
0With diameter L
1Occurrence directly depend on the area density in hole and the sectional area in each hole, and finally depend on the required magnetic permeability of ferrite sintered body sheet material.
(7). the magnetic permeability calculating that is used for boring ferrite sheet material of the present invention and is used for trough of belt ferrite sheet material as a comparative example.
According to the design pattern among Fig. 1 (a), develop Mathematical Modeling (shown in Fig. 2 (a)-(d)), wherein L according to theory of magnetism
0Be the spacing in two adjacent holes, and L
1It is the width in hole.R
1, R
2And R
3Magnetic resistance shown in the presentation graphs 2 (a), it has shown that the hole on the sheet material is that thickness along sheet material runs through fully.R
Effectively-hole 1Expression ferrite sheet material has effective magnetic resistance of the part in hole.
So, set up following equation:
Wherein d is the thickness of ferrite sheet material.
Because R
Effectively-hole 1By R
1, R
2And R
3In parallel and series connection obtains, and equivalent magnetic circuit provides in Fig. 2 (b), can be with R
Effectively-hole 1Be written as:
So, μ
Effectively-hole 1Can be written as:
Get η
The holeAs the area density in the hole of boring, so
Wherein, S
The holeThe sectional area summation in hole on the expression sheet material, and S
AlwaysThe sectional area of expression sheet material.
μ
Effectively-hole 1Be subjected to the influence of area density η as follows:
If the hole is not run through fully as shown in Figure 2, then exist and R
Effectively-hole 1Ferrite-plate in parallel.Magnetic resistance of equal value loop provides in Fig. 2 (d).Has hole depth rate κ
The holeThe effective permeability μ of ferrite sheet material of the boring that not exclusively runs through
Effectively-holeCan be written as:
Use the ferritic sketch of trough of belt that runs through shown in identical theory and Fig. 1 (b), set up corresponding model (shown in Fig. 3 (a)～(d)) for the trough of belt ferrite that foundation runs through.L
0The spacing (centre distance) of two adjacent grooves of expression, and L
1It is the width of groove.R
1, R
2And R
3The corresponding magnetic resistance of (shown in Fig. 3 (a)) can be write:
Can be used as series connection and R in parallel
1, R
2And R
3Calculate R
Effectively-groove 1μ
Effectively-groove 1(shown in Fig. 3 (b)):
Groove η
GrooveArea density can be as giving a definition:
Wherein, S
GrooveThe summation of the sectional area of all grooves on the expression sheet material, and S
AlwaysThe sectional area of expression sheet material.
So, can be with μ
Effectively-groove 1Writing:
Consider in the trough of belt ferrite sheet material that not exclusively runs through shown in Fig. 3 (c), exist and R
Effectively-groove 1Ferrite-plate in parallel.Magnetic resistance of equal value loop provides in Fig. 3 (d).So, be with specific groove depth to compare κ
GrooveThe effective permeability μ of ferrite sheet material
Effectively-grooveCan write:
Therefore, the magnetic permeability of boring ferrite sheet material can be calculated based on formula (9), and the magnetic permeability of trough of belt ferrite sheet material can be calculated based on formula (16), wherein, can be with μ for Ni-Zn ferrite sheet material
1Be taken as 130, this is to be used for the ferritic standard value of Ni-Zn, μ at 13.56MHz
0Be 1, this is the magnetic permeability of air.Can determine η with the ratio of the sectional area of sheet material by the total sectional area that calculates hole/groove respectively
The holeAnd η
Grooveη
The holeAnd η
GrooveCan be typically 0.01% to 30%.Can determine κ with the ratio of the thickness of sheet material by the degree of depth of calculating the hole equally
The holeAnd κ
Groove, and κ typically
The holeAnd κ
GrooveCan be 60% to 100%.
Based on equation (9) and (16), thereby the magnetic permeability of the trough of belt ferrite sheet material that can calculate the magnetic permeability of boring ferrite sheet material and run through, and the further comparison of can hole ferrite sheet material and the magnetic permeability of the trough of belt ferrite sheet material that runs through is to investigate their validity.
As by shown in the following specific embodiment, a plurality of holes on the ferrite sintered body sheet material not only can keep the magnetic permeability higher than trough of belt pattern, but also can make the die-cut easier of sheet material.
B. antenna slider
On the other hand; the invention discloses a kind of antenna slider; described antenna slider comprises as the ferrite sintered body sheet material that proposes among the present invention, is arranged on the diaphragm on first side of described ferrite sintered body sheet material, and is arranged on the adhesive layer on second side of described ferrite sintered body sheet material.In one embodiment, release layer is arranged on the adhesive layer to protect adhesive layer not to be subjected to dirt and debris influence.
In one embodiment of the invention, diaphragm can be polymer film.In one embodiment of the invention, diaphragm can be selected from the group that comprises the following, but is not limited to: polyethylene film, polypropylene screen, polychloroethylene film and PETG film.In addition, in one embodiment of the invention, diaphragm can be hard the coating, so that the hard diaphragm that applies has the hardness that is higher than about 2H (pencil hardness).The hard diaphragm that applies can not abraded and not broken for the protection of the ferrite sheet material.
In one embodiment of the invention, diaphragm has about 0.002mm to the thickness of about 0.1mm.
In one embodiment of the invention, adhesive layer is based on the adhesive layer of acrylic compounds or rubber.Adhesive layer is based in the embodiment of adhesive layer of acrylic compounds therein, is the acrylic compounds pressure-sensitive adhesive layer based on the adhesive layer of acrylic compounds.
In addition, in one embodiment of the invention, the acrylic compounds pressure-sensitive adhesive layer can be structurized acrylic compounds pressure-sensitive adhesive layer.Can adopt this structurized acrylic compounds pressure-sensitive adhesive layer to overcome the application of adhesive article and some difficulties that replacement is followed, as the bubble of catching that when with acrylic compounds pressure-sensitive adhesive layer and ferrite sheet material lamination, produces.
In one embodiment of the invention, adhesive layer has about 0.05 to about 2N/mm and especially about peel strength of 0.3 to about 1.2N/mm.
In one embodiment of the invention, release layer can be that the PET film adds the siloxanes release coat.
For example, as shown in Figure 7, provide antenna slider 100 and it to comprise aforesaid ferrite sintered body sheet material 10, diaphragm 20, adhesive layer 30 and release layer 40.Ferrite sintered body sheet material 10 has first side 11 (being end face) and second side 12 (be bottom surface) opposite with first side 11.First side 11 and second side 12 were bored in a plurality of holes 13, and in other words, the degree of depth in hole equals the thickness of sheet material.Diaphragm 20 is arranged on first side 11 of ferrite sintered body sheet material.Adhesive layer 30 is arranged on second side 12 of ferrite sintered body sheet material 10.Release layer 40 is attached on the adhesive layer 30.
Surpass 80 magnetic permeability because the ferrite sintered body sheet material with hole that proposes in the present invention has at 13.56MHz, thereby, the magnetic permeability of antenna slider 13.56MHz surpass 80 and this insulator can satisfy the basic need of this area.
Owing to described boring ferrite sheet material, antenna slider of the present invention can keep high magnetic permeability, simultaneously owing to a plurality of holes on the ferrite sintered body sheet material, the die-cutting performance that also provides when it is divided into fritter.
C. Anneta module
Another aspect again, the invention provides a kind of Anneta module, described Anneta module can be used in radio communication medium or the radio communication media processing apparatus, described Anneta module comprises the antenna slider as proposing among the present invention, be arranged on the conducting loop-shaped antenna on first side of described antenna slider, and be arranged on the conductive layer on second side of described antenna slider.
The conducting loop-shaped antenna can be copper or the aluminium etching antenna that has pet substrate.Its shape can be for example, to have annular, rectangle or the square of the resonance frequency of 13.56MHz.Size can be about 80cm
2To about 0.1cm
2, wherein thickness is that about 35 μ m are to about 10 μ m.The resistance of conducting loop-shaped antenna is lower than about 5 Ω.
Conductive layer can be aluminium or the copper layer that has the maximum ga(u)ge of about 80 μ m, and its sheet resistance is lower than about 5 Ω.
Embodiment:
Following examples and comparative example further describe the present invention, but should not be interpreted as limiting its scope.
A prepares embodiment
In order to show that the boring ferrite sheet material that proposes among the present invention about the benefit of magnetic permeability, compares experiment.
Prepare the boring ferrite sheet material that runs through fully according to the step that provides above.The ferrite sheet material mainly consist of (Ni
0.2Zn
0.5Cu
0.15) (Fe
2O
4).
The width in each hole is about 0.1mm in the boring ferrite sheet material that runs through fully, and the spacing in two adjacent holes is about 2mm.The area density in hole is 0.19%.
Simultaneously, do not hole the ferrite sheet material except not needing boring, prepare A as a comparative example according to the step identical with the step for preparing the boring ferrite sheet material that runs through fully.
Use is available from the trough of belt ferrite sheet material FLX-953 of Toda ISU Corporation (" Toda ") B as a comparative example.The width of trough of belt ferrite sheet material is 0.025mm, and the spacing of two adjacent grooves is 2mm.The area density of groove is 2.4%.The depth-to-width ratio of groove is 20%.
These three sheet materials have identical thickness.
On the one hand, use Agilent E4991ARF impedance/material analyzer to measure the magnetic permeability of the sample of the boring ferrite sheet material that runs through fully of the present invention, the magnetic permeability of Comparative examples A (the ferrite sheet material of not holing) and the magnetic permeability of comparative example B (available from the trough of belt ferrite sheet material of Toda) respectively at 13.56MHz.Those skilled in the art will know that how to measure, so will omit for the explanation of measuring at this.
On the other hand, calculate the effective permeability of three sheet materials based on the formula that provides above.According to formula (8), the effective permeability of calculating boring ferrite sheet material be 125 and the effective permeability of calculating Comparative examples A (the ferrite sheet material of not holing) be 130.According to formula (16), the effective permeability of calculating comparative example B (available from the trough of belt ferrite sheet material of Toda) is 114.
The calculated data that derives from the effective permeability of the measurement data of Agilent E4991A RF impedance/material analyzer and three sheet materials is summarised in the table 3.
Table 3
| Comparative example B | Sample under the present invention | Comparative examples A | |
| The magnetic permeability that records | 114 | 123 | 126 |
| The magnetic permeability that calculates | 114 | 125 | 130 |
From the data of table 3, can observe: as proposing among the present invention, the magnetic permeability of sheet material with holes is close to the magnetic permeability of the sheet material of not holing that does not have any hole or groove, and the magnetic permeability of trough of belt sheet material is obviously different with the magnetic permeability of the sheet material of not holing.
In addition, last table shows that magnetic permeability by measuring the sheet material that obtains is with very little by the difference on the magnetic permeability of the sheet material that calculated by the formula that provides above.Therefore, the magnetic permeability that calculates according to this formula is reliable.
Embodiment 2 die-cut character
Die-cutting performance to the die-cutting performance of the boring ferrite sheet material that proposed by the present invention and the ferrite sheet material of not holing of not with holes or groove carries out another comparative test.
Use the sample of the Comparative examples A of the sample of the boring ferrite sheet material that runs through fully of embodiment 1 time preparation and the ferrite sheet material of not holing here.
Use internal diameter to be the annular reamer of 18.0mm die-cut boring and the ferrite sheet material of not holing respectively as 8.0mm and external diameter.Fig. 4 a and 4c have shown die-cut a plurality of little ring segment from hole sheet material and the ferrite sheet material of not holing respectively.As shown, after die-cut, the boring ferrite as shown in Fig. 4 a and 4b has less crackle at its edge, and the ferrite of not holing as shown in Fig. 4 c and 4d has much more crackle.
Therefore, boring ferrite sheet material of the present invention not only can keep the high magnetic permeability close to the magnetic permeability of the ferrite sheet material of not holing, but also can improve die-cutting performance.In addition, magnetic permeability also is higher than traditional trough of belt sheet material.
B predicts embodiment
In order to show that the boring ferrite sheet material that proposes among the present invention is about the benefit of the magnetic permeability under area density and the degree of depth under the different magnetic permeabilitys, a plurality of boring ferrite sintered body sheet materials and a plurality of trough of belt ferrite sintered body sheet material are carried out modeling and design, and each sheet material have unique area density and the degree of depth.Because the distance in the size in hole and two adjacent holes has limited influence to the magnetic permeability of boring ferrite sheet material, in the following embodiments these two factors are ignored.Calculate the magnetic permeability of each sheet material based on the formula that provides above.
Embodiment 3
Design a plurality of boring ferrite sintered body sheet materials that run through fully.For these sheet materials, as shown in table 4 below, the area density of each sheet material mesopore is different with the area density in the hole of other sheet materials.The degree of depth in each hole equals the thickness of sheet material.Yet the parameter of each sheet material itself is identical with character.
In addition, a plurality of trough of belt ferrite sintered body sheet materials that are used as comparative example have also been designed.The parameter of these trough of belt ferrite sintered body sheet materials is identical with the boring ferrite sintered body sheet material that runs through fully with character, except in sheet material, slotting, rather than boring, and as shown in table 4 below, the area density of the groove on each sheet material is different with the groove of other sheet materials.The degree of depth of each groove equals the thickness of sheet material.
Based on equation (9) and (16), calculate the magnetic permeability of boring ferrite sheet material and the magnetic permeability of trough of belt ferrite sheet material, wherein with μ
1Be taken as 130, this is to be used for the ferritic representative value of Ni-Zn, μ at 13.56MHz
0Be 1, this is the magnetic permeability of air, κ
The holeAnd κ
GrooveEqual 100%, referring to following table 3, with η
The holeBe designed to 0.01%, 0.25%, 2.5%, 17.5 etc. respectively, and with η
GrooveBe designed to 0.25%, 2.5%, 12.5 etc. respectively.Provided the result who calculates among table 4 below and Fig. 5 (a).
In table 4, among the embodiment 3, but embodiment 3-1 to 3-9 represents respectively to have different area density the boring ferrite sheet material of the identical degree of depth.In embodiment 3, but comparative example 3-1 to 3-9 represents to have different area densities the trough of belt ferrite sheet material of the identical degree of depth.This explanation also is suitable for other following embodiment, as embodiment 4 and embodiment 5.
Table 4
| Embodiment | Area density (η) | Effective permeability |
| Embodiment 3-1 | 0.01 | 129.2 |
| Embodiment 3-2 | 0.25 | 124.3 |
| Embodiment 3-3 | 2.5 | 110.4 |
| Embodiment 3-4 | 5 | 101.9 |
| Embodiment 3-5 | 6 | 99.1 |
| Embodiment 3-6 | 10 | 89.8 |
| Embodiment 3-7 | 12.5 | 85.0 |
| Embodiment 3-8 | 15 | 80.6 |
| Embodiment 3-9 | 17.5 | 76.6 |
| Comparative example 3-1 | 0.01 | 129.1 |
| Comparative example 3-2 | 0.25 | 111.7 |
| Comparative example 3-3 | 2.5 | 48.9 |
| Comparative example 3-4 | 5 | 29.7 |
| Comparative example 3-5 | 7.5 | 21.1 |
| Comparative example 3-6 | 10 | 16.2 |
| Comparative example 3-7 | 12.5 | 13.0 |
| Comparative example 3-8 | 15 | 10.9 |
| Comparative example 3-9 | 17.5 | 9.2 |
Fig. 5 (a) has shown the effective permeability (the Filled Rectangle curve among Fig. 5 (a)) of the boring ferrite sheet material that runs through fully and the effective permeability of trough of belt ferrite sheet material (the solid circles curve among Fig. 5 (a)).As in Fig. 5 (a) as can be seen, under area identical density, the ferritic magnetic permeability of the boring that runs through fully is more much higher than the magnetic permeability of the trough of belt ferrite sheet material that runs through; In the curve of being represented by black triangle, provided both poor.
Magnetic permeability greater than 80 is preferred.According to these preferred needs, the area density in hole is lower than about 15%.More preferably the area density in hole is lower than about 6% so that obtain magnetic permeability greater than 100.
Embodiment 4
Be similar to embodiment 3, design another batch boring ferrite sintered body sheet material and another batch trough of belt ferrite sintered body sheet material.For these sheet materials, the degree of depth of hole or groove is gross thickness about 80% of sheet material, and the area density of hole or groove on every block of sheet material of variation as shown in table 5.
The calculating magnetic permeability of every block of sheet material below table 5 and in Fig. 5 (b), provide.
Table 5
| Embodiment | Area density (%) | Effective permeability |
| Embodiment 4-1 | 0.01 | 129.4 |
| Embodiment 4-2 | 0.25 | 125.4 |
| Embodiment 4-3 | 2.5 | 114.3 |
| Embodiment 4-4 | 5 | 107.5 |
| Embodiment 4-5 | 7.5 | 102.3 |
| Embodiment 4-6 | 10 | 97.8 |
| Embodiment 4-7 | 12.5 | 94.0 |
| Embodiment 4-8 | 20 | 90.5 |
| Embodiment 4-9 | 25 | 78.7 |
| Comparative example 4-1 | 0.01 | 129.3 |
| Comparative example 4-2 | 0.25 | 115.4 |
| Comparative example 4-3 | 2.5 | 65.1 |
| Comparative example 4-4 | 5 | 49.7 |
| Comparative example 4-5 | 7.5 | 42.8 |
| Comparative example 4-6 | 10 | 38.9 |
| Comparative example 4-7 | 12.5 | 36.4 |
| Comparative example 4-8 | 20 | 32.4 |
| Comparative example 4-9 | 25 | 31 |
Be that the area density in hole is for being lower than about 25% greater than about 80 according to preferred needs magnetic permeability.More preferably the area density in hole is lower than about 8% so that obtain magnetic permeability greater than 100.
Embodiment 5
Be similar to embodiment 3, designed again another batch boring ferrite sintered body sheet material and another batch trough of belt ferrite sintered body sheet material.For these sheet materials, the degree of depth of hole or groove is gross thickness about 60% of sheet material, and the hole on every block of sheet material of change as shown in table 6 or the area density of groove.
The calculating magnetic permeability of every block of sheet material below table 6 and in Fig. 5 (c), provide.
Table 6
| Embodiment | Area density (%) | Effective permeability |
| Embodiment 5-1 | 0.01 | 129.5 |
| Embodiment 5-2 | 0.25 | 126.6 |
| Embodiment 5-3 | 2.5 | 118.2 |
| Embodiment 5-4 | 5 | 113.1 |
| Embodiment 5-5 | 7.5 | 109.2 |
| Embodiment 5-6 | 10 | 105.9 |
| Embodiment 5-7 | 30 | 87.8 |
| Embodiment 5-8 | 40 | 81.2 |
| Embodiment 5-9 | 42.5 | 79.7 |
| Comparative example 5-1 | 0.01 | 129.4 |
| Comparative example 5-2 | 0.25 | 119.0 |
| Comparative example 5-3 | 2.5 | 81.3 |
| Comparative example 5-4 | 5 | 69.8 |
| Comparative example 5-5 | 7.5 | 64.6 |
| Comparative example 5-6 | 10 | 61.7 |
| Comparative example 5-7 | 30 | 55.0 |
| Comparative example 5-8 | 40 | 54.1 |
| Comparative example 5-9 | 42.5 | 53.9 |
Be that the area density in hole is for being lower than about 42.5% greater than about 80 according to preferred needs magnetic permeability.More preferably the area density in hole is lower than about 15% so that obtain magnetic permeability greater than 100.
Embodiment 6
Be similar to embodiment 3, designed again another batch boring ferrite sintered body sheet material and another batch trough of belt ferrite sintered body sheet material.For these sheet materials, the degree of depth of hole or groove is gross thickness about 50% of sheet material, and the hole on every block of sheet material of change as shown in table 7 or the area density of groove.
The calculating magnetic permeability of every block of sheet material below table 7 and in Fig. 5 (d), provide.
Table 7
| Embodiment | Area density (%) | Effective permeability |
| Embodiment 6-1 | 0.01 | 129.6 |
| Embodiment 6-2 | 0.25 | 127.1 |
| Embodiment 6-3 | 2.5 | 120.2 |
| Embodiment 6-4 | 5 | 115.9 |
| Embodiment 6-5 | 7.5 | 112.6 |
| Embodiment 6-6 | 10 | 109.9 |
| Embodiment 6-7 | 40 | 89.3 |
| Embodiment 6-8 | 60 | 80.1 |
| Embodiment 6-9 | 65 | 78.0 |
| Comparative example 6-1 | 0.01 | 129.5 |
| Comparative example 6-2 | 0.25 | 120.8 |
| Comparative example 6-3 | 2.5 | 89.4 |
| Comparative example 6-4 | 5 | 79.8 |
| Comparative example 6-5 | 7.5 | 75.5 |
| Comparative example 6-6 | 10 | 73.1 |
| Comparative example 6-7 | 40 | 66.7 |
| Comparative example 6-8 | 60 | 66.0 |
| Comparative example 6-9 | 65 | 65.9 |
It is preferred being higher than about 80 magnetic permeability.In this case the area density in hole on be limited to 60%.According to formula (7), the original size of getting the ferrite sheet material is 1mm
2To 16mm
2, be limited to 9.6mm on the area in hole
2
Fig. 5 (a)-(d) has provided the boring ferrite sheet material that has a plurality of depth-to-width ratios and the effective permeability of trough of belt ferrite sheet material, shown in depth-to-width ratio be respectively about 100%, 80%, 60% and 50% of sheet thickness.Under identical depth-to-width ratio and area identical density, boring ferrite sheet material has the magnetic permeability higher than trough of belt ferrite as can be seen.
Embodiment 7 magnetic permeabilitys relatively
In addition, for the magnetic permeability of the boring ferrite sheet material that will run through fully and the trough of belt ferrite sheet material that has specific depth-to-width ratio relatively, as shown in Figure 6, make another width of cloth figure based on the above analog result among the embodiment 3 to embodiment 6.As can be seen: under area identical density, the boring ferrite sheet material that runs through fully (the Filled Rectangle curve shown in Fig. 6) in 0.01% to 23% area density respectively than having 50% (the maltese cross heart circle curve shown in Fig. 6), 60% (the empty circles curve shown in Fig. 6), the higher magnetic permeability of trough of belt ferrite of the depth-to-width ratio of 80% (the semisolid circle curve shown in Fig. 6) and 100% (the solid circles curve shown in Fig. 6).
Therefore, for the boring ferrite sheet material that runs through fully, if the sectional area of this sheet material is at 1mm
2To 16mm
2Between, according to formula (7), S
The holeCan be 100 μ m
2To 3.7mm
2
Though described the present invention according to preferred embodiment above, it can have been revised in spirit and scope of the present disclosure.Therefore this application is intended to cover of the present invention any variation, purposes or the change of using General Principle disclosed herein.In addition, this invention is intended to cover in the known or habitual practical framework in the field of the present invention and drop on departing from for of the present disclosure in the scope of restriction of following claim.
Claims (25)
1. ferrite sintered body sheet material, described ferrite sintered body sheet material have about 0.01mm to the thickness of about 0.5mm, and wherein said sheet material has a plurality of holes therein.
2. ferrite sintered body sheet material according to claim 1, the area density in wherein said hole is about 0.01% to about 60%.
3. ferrite sintered body sheet material according to claim 1, the thickness by described sheet material is run through in wherein said hole fully, and the area density in wherein said hole is about 0.01% to about 15%.
4. ferrite sintered body sheet material according to claim 3, the area density in wherein said hole is about 0.01% to about 6%.
5. ferrite sintered body sheet material according to claim 1, wherein the cross sectional shape of each of a plurality of holes is selected from the group of being made up of the following: circle, annular, rhombus, triangle, cross and rectangle.
6. ferrite sintered body sheet material according to claim 1, wherein arrange in the mode of straight line or bending pattern in the described hole of at least a portion.
7. ferrite sintered body sheet material according to claim 1, wherein the sectional area in each hole is about 100 μ m
2To about 9.6mm
2
8. ferrite sintered body sheet material according to claim 7, wherein the sectional area in each hole is about 100 μ m
2To about 3.7mm
2
9. ferrite sintered body sheet material according to claim 8, wherein the sectional area in each hole is about 100 μ m
2To about 0.9mm
2
10. ferrite sintered body sheet material according to claim 1, wherein the degree of depth in each hole is greater than about 50% of the thickness of described ferrite sintered body sheet material.
11. ferrite sintered body sheet material according to claim 1 is wherein with the arranged in form of described hole with array.
12. ferrite sintered body sheet material according to claim 11, wherein said array are rectangular array or rhombus array.
13. ferrite sintered body sheet material according to claim 1, wherein said ferrite sintered body sheet material is formed by the oxide of Fe, the oxide of described Fe is by at least a doped with metal elements, and described at least a metallic element is selected from the group of being made up of the following: Ni, Zn, Cu, Co, Ni, Li, Mg and Mn.
14. ferrite sintered body sheet material according to claim 1, wherein said ferrite is selected from the group of being made up of the following: Ni-Zn-Cu ferrite, Mn-Zn-Cu ferrite and Mn-Mg-Cu ferrite.
15. an antenna slider, described antenna slider comprises:
According to each the described ferrite sintered body sheet material in the claim 1 to 14;
Diaphragm, described diaphragm are arranged on first side of described ferrite sintered body sheet material; And
Adhesive layer, described adhesive layer are arranged on second side of described ferrite sintered body sheet material.
16. antenna slider according to claim 15, wherein said diaphragm is polymer film.
17. antenna slider according to claim 16, wherein said polymer film is selected from the group of being made up of the following: polyethylene film, polypropylene screen, polychloroethylene film and PETG film.
18. antenna slider according to claim 15, wherein said diaphragm are hard the coatings, so that described diaphragm has the hardness greater than about 2H.
19. antenna slider according to claim 15, wherein said diaphragm have about 0.002mm to the thickness of about 0.1mm.
20. antenna slider according to claim 15, wherein said adhesive layer is based on the adhesive layer of acrylic compounds or rubber.
21. antenna slider according to claim 20, wherein said adhesive layer is based on the adhesive layer of acrylic compounds, and wherein said adhesive layer based on acrylic compounds is the acrylic compounds pressure-sensitive adhesive layer.
22. antenna slider according to claim 21, wherein said acrylic compounds pressure-sensitive adhesive layer are structurized acrylic compounds pressure-sensitive adhesive layers.
23. antenna slider according to claim 15, wherein said adhesive layer have about peel strength of 0.05 to about 2N/mm.
24. antenna slider according to claim 23, wherein said adhesive layer have about peel strength of 0.3 to about 1.2N/mm.
25. an Anneta module, described Anneta module comprises:
According to each the described antenna slider in the claim 15 to 24;
Conducting loop-shaped antenna, described conducting loop-shaped antenna are arranged on first side of described antenna slider; And
Conductive layer, described conductive layer are arranged on second side of described antenna slider.
Applications Claiming Priority (2)
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|---|---|---|---|
| CNPCT/CN2012/070178 | 2012-01-10 | ||
| PCT/CN2012/070178 WO2013104110A1 (en) | 2012-01-10 | 2012-01-10 | Hole-drilled sintered ferrite sheet, antenna isolator, and antenna module |
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| KR (1) | KR101851426B1 (en) |
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| CN103779653A (en) * | 2013-11-18 | 2014-05-07 | 深圳市九思泰达技术有限公司 | NFC antenna and apparatus |
| CN106141429A (en) * | 2015-04-28 | 2016-11-23 | 西酉电子科技（上海）有限公司 | The technique of waste material in a kind of ferrite product hole getting rid of laser |
| CN106181054A (en) * | 2015-04-30 | 2016-12-07 | 西酉电子科技（上海）有限公司 | A kind of ganoid ferrite product laser formation method |
| CN106181055A (en) * | 2015-04-30 | 2016-12-07 | 西酉电子科技（上海）有限公司 | A kind of method from Ferrite Material glue surface laser formation ferrite product |
| CN108911729A (en) * | 2018-06-28 | 2018-11-30 | 宁波高新区兆丰微晶新材料有限公司 | Ni-Zn-Cu system complex ferrite piece and preparation method thereof |
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| CN104868228B (en) | 2014-02-25 | 2018-05-11 | 华为技术有限公司 | Dual polarized antenna and aerial array |
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| WO2017099993A1 (en) | 2015-12-08 | 2017-06-15 | 3M Innovative Properties Company | Magnetic isolator, method of making the same, and device containing the same |
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| CN103200807B (en) | 2016-08-03 |
| KR101851426B1 (en) | 2018-04-23 |
| WO2013104110A1 (en) | 2013-07-18 |
| KR20140109488A (en) | 2014-09-15 |
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