KR101661596B1 - Multi sheet for antenna - Google Patents
Multi sheet for antenna Download PDFInfo
- Publication number
- KR101661596B1 KR101661596B1 KR1020150113294A KR20150113294A KR101661596B1 KR 101661596 B1 KR101661596 B1 KR 101661596B1 KR 1020150113294 A KR1020150113294 A KR 1020150113294A KR 20150113294 A KR20150113294 A KR 20150113294A KR 101661596 B1 KR101661596 B1 KR 101661596B1
- Authority
- KR
- South Korea
- Prior art keywords
- sheet
- antenna
- coating layer
- amorphous
- shielding
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/02—Arrangements for de-icing; Arrangements for drying-out ; Arrangements for cooling; Arrangements for preventing corrosion
-
- 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
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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
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
A composite sheet for an antenna and a manufacturing method thereof are disclosed. The present invention includes a first sheet for shielding an antenna in a high frequency band and a second sheet stacked to form a step with the first sheet, wherein the second sheet has a cross section formed by forming a coating layer on a stepped section It is possible to permanently protect the antenna, thereby extending the lifetime of the antenna and improving the reliability thereof.
Description
The present invention relates to a composite sheet for an antenna, and more particularly, to a composite sheet for an antenna in which a coating layer is formed on a stepped section of a composite sheet composed of one or more shielding sheets for shielding a magnetic field and heat generated in the portable terminal, And a manufacturing method thereof.
(NFC), a wireless charger, and an interactive pen tablet.
NFC is one of the RFID tags, which is a non-contact type short-range wireless communication module using 13.56Mz frequency band. It is a technology to transmit data between terminals at a distance of 10cm. NFC is widely used not only for mobile payments, but also for transferring travel information, transportation, and access control locks for goods information and visitors in supermarkets and general shops, as well as for file transfer.
In addition, recently announced by Google, 'Android Beam' included in the smart phone is a near-field wireless communication (NFC) -based short distance information transmission and reception function that not only allows mobile payment but also photo, business card, file, map, To other phones.
2. Description of the Related Art Wireless environments of RFID (Radio Frequency Identification) are widely used in portable terminals. For example, an NFC chip for realizing Near Field Communication (NFC) is installed in a portable terminal, When a non-contact type smart card such as a USIM (Universal Subscriber Identity Module) card is attached to access an external RF reader, the information of the USIM card of the portable terminal is read by the RF reader by the short distance wireless communication, (For example, an electronic money function) such as an electronic money function is realized.
At this time, information exchange between the NFC chip and the RF reader is performed by driving the USIM card by the electromotive force at 13.56 MHz between the primary coil (antenna) installed in the RF reader and the coil of the NFC chip installed in the portable terminal For example.
In addition, the NFC chip installed in the portable terminal device is also developed as an RFID reader so as to be able to read information recorded in an external RFID tag or the like. When an NFC chip operates as an RF reader, an antenna (coil) connected to the NFC chip acts as a primary coil to transmit power, and an induced electromotive force is generated in a coil (antenna) To be realized.
That is, in order to apply the RFID system (NFC) to the portable terminal, a helical coil type loop antenna capable of generating an induced electromotive force is required, and the NFC antenna is mainly installed in the battery cover.
In this case, the induced electromotive force induced in the helical coil-shaped loop antenna is determined by Faraday's law and Lenz's law. Therefore, in order to obtain a high voltage signal, a secondary coil (antenna coil) The greater the amount of magnetic flux, the better. The amount of magnetic flux increases as the amount of soft magnetic material contained in the secondary coil increases and as the permeability of the material increases.
In addition, a magnetic field is generated in an antenna coil provided in the portable terminal when performing a short-range wireless communication (NFC) function with an adjacent terminal.
Therefore, in a portable terminal device having such an additional function, it is possible to prevent heat due to eddy current from being applied to a component (particularly, battery) of the portable terminal device due to the magnetic field and to maximize the performance of the additional function A shielding sheet is essentially used.
As such a shielding sheet, a magnetic material such as a polymer sheet including amorphous, ferrite and magnetic powder is generally used. The magnetic field focusing effect for enhancing the magnetic shielding and the performance of the additional function is preferably in the order of the
Therefore, conventionally, a magnetic sheet made of a magnetic sheet having a composition selected from the group consisting of Fe-Si-B, Fe-Si-B-Cu-Nb, Fe-Zr-B and Co- An absorber for an RFID antenna, an RFID antenna including the same, and a wireless identification device.
Meanwhile, an antenna for a magnetic security transmission (MST) (hereinafter referred to as a "payment antenna") as a payment means using a wireless charging antenna for wireless charging and a portable terminal together with an NFC antenna is integrally formed in the portable terminal, Of the battery pack.
In a typical structure of an antenna substrate in which two or more different types of antennas are integrated, an antenna for wireless charging for wireless charging is located at the center of an antenna substrate of an S company, an MST antenna coil is placed on the antenna, Three types of antennas in which antenna coils exist are integrally formed or two integral types in which only a wireless recharging antenna and an NFC antenna exist without an MST antenna if necessary.
In order to prevent heat generation due to eddy current and to concentrate a magnetic field to improve respective antenna characteristics and transmission efficiency, a terminal equipped with an integrated structure in which two or more kinds of antennas for generating such a magnetic field are combined A suitable magnetic shielding sheet should be used.
Therefore, in the conventional composite sheet, the amorphous sheet has a higher permeability than the ferrite sheet and is mainly used to shield the magnetic field of the wireless charging antenna. The polymer sheet including the ferrite sheet or the magnetic powder has a low permeability and low loss rate And is used to shield the magnetic field of the short-range wireless antenna.
If an amorphous sheet having a high permeability and a high loss ratio is used for shielding a short-range wireless antenna, the performance of the short-range wireless antenna can be largely deteriorated because a proper Q value can not be formed.
Therefore, in the two or more integral type antenna structure including the wireless rechargeable antenna, the polymer sheet including the ferrite sheet or the magnetic powder is placed in consideration of the characteristics of the antenna for the short-range wireless communication, A step is formed by the area difference of each sheet in the form of a composite sheet in which Perth sheets are laminated.
Therefore, conventionally, the stepped section of the amorphous sheet is shielded as a double-sided tape to prevent contact of substances such as air or saline which may cause oxidation.
However, since the conventional composite sheet shields a stepped section as a double-sided tape, air may remain in the process of adhering the double-sided tape. That is, in the conventional stepped section, air is left between the double-sided tape and the end face, and an air gap is generated where the double-sided tape causes mobility.
Therefore, in the conventional composite sheet, the air remaining in the air gap (AIR GAP) can oxidize the cross section of the amorphous sheet, thereby deteriorating the antenna performance.
Further, since the conventional composite sheet is a double-sided tape which is shielded by a step section, the oxidation can be prevented in a short period of time. However, when a certain period of time is elapsed, the adhesive force is weakened and saltwater infiltration may occur. That is, the conventional composite sheet has a problem in that it is not possible to permanently protect the brine and other substances causing oxidation.
A first object of the present invention is to provide a composite sheet for an antenna capable of permanently protecting a composite sheet in which one or more magnetic sheets are laminated so as to shield a substrate on which at least one antenna pattern is formed, .
A second object of the present invention is to provide a composite sheet for an antenna capable of preventing an air gap in a composite sheet laminated on a substrate on which at least one antenna pattern is formed, and a manufacturing method thereof.
SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide an antenna device and a method for manufacturing the same. And one or more amorphous sheets (AMORPHOUS SHEET) which are sequentially laminated.
Further, the composite sheet of the present invention further includes a third sheet that shields heat from the upper surface of the second sheet.
A method for manufacturing a composite sheet for an antenna according to the present invention includes a lamination step of laminating one or more magnetic sheets, a punching step of punching the laminated sheet to have a predetermined area, and a step of forming a coating layer And a filling step of filling the outer surface of the coating layer with a filler to expand the outer surface of the coating layer by a predetermined area.
Accordingly, the present invention provides a UV coating layer formed on the cross section of the composite sheet to permanently protect the punched cross section, thereby extending the lifetime of the antenna and improving the reliability thereof.
Further, the present invention has the effect of preventing the air gap (AIR GAP) by forming the UV coating layer on the stepped section in the composite sheet in which one or more magnetic sheets are laminated.
1 is a plan view showing a composite sheet for an antenna according to the present invention.
2 is a plan view of a substrate on which a composite sheet for an antenna according to the present invention is laminated.
3 is a flowchart showing a method of manufacturing a composite sheet for an antenna according to the present invention.
4 is a flowchart showing a second sheet producing step in the composite sheet manufacturing method for an antenna according to the present invention.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments It is not limited to examples and examples.
It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term in order to describe its invention in the best possible way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention.
Throughout this specification and claims, when a section is referred to as " including " an element, it is understood that it may include other elements, aside from other elements, .
Hereinafter, preferred embodiments of a composite sheet for an antenna and a method of manufacturing the same according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view illustrating a composite sheet for an antenna according to the present invention, and FIG. 2 is a cross-sectional view illustrating a substrate 200 on which a composite sheet for an antenna according to the present invention is stacked.
Referring to FIGS. 1 and 2, a composite sheet for an antenna according to the present invention includes first to third sheets sequentially stacked on a substrate 200 on which at least one antenna pattern is formed, (140), and a filler (150) that protects the outer surface of the coating layer (140).
The substrate 200 includes a
The
The
The
The first protection means 113 protects the appearance of the
The
Here, the
For example, the
The second protection means 123 is adhered to the upper surface of the second amorphous sheet 122 'with a film and / or a resin plate for protecting the outer surface of the
Here, the
Therefore, the
The
Here, the graphite sheet 132 (graphite sheet) is coated with graphite powder, and the graphite powder may be scattered or contacted with the object or the human body during operation or use of the operator.
Therefore, the third protection means 133 is adhered and shielded so as to surround the entire structure so that the
Here, the first to third
The
The filling
Hereinafter, a method of manufacturing a composite sheet for an antenna according to the present invention will be described with reference to the accompanying flowcharts.
3 is a flowchart showing a method of manufacturing a composite sheet for an antenna according to the present invention.
Referring to FIG. 3, a method for manufacturing a composite sheet for an antenna according to the present invention includes a
The
Then, the operator attaches the double-faced tape from which the releasing paper is removed from the lower surface of the
Step S200 of fabricating the
The
In the laminating step S400, the
Here, the short-range
Accordingly, the
The
Therefore, the
Such a process will be described in the manufacturing step S200 of the
4 is a flowchart showing a second sheet producing step in the method for producing a composite sheet for an antenna according to the present invention.
Referring to FIG. 4, the second sheet manufacturing step S200 includes a stacking step S210 of stacking at least one
The lamination step S210 is a step of sequentially laminating at least one
Here, the
The punching step S220 is a step of cutting the
The coating step S230 is a step of forming the
The filling step S240 is a step of filling the
Therefore, the filling
As the
The
Similarly, the operator removes the release paper of the double-sided tape adhered to the lower surface of the
That is, according to the present invention, an air gap (AIR GAP) is not generated by UV coating a cross section of the
In addition, according to the present invention, the
100: composite sheet 110: first sheet
112:
113: first protection means 120: second sheet
122, 122 ': Amorphous sheet 123: Second protective means
130: third sheet 132: graphite sheet
133: third protection means 140: coating layer
150: filler material 200: substrate
210: Short-range wireless antenna pattern 220: Wireless charging antenna pattern
230: Distribution antenna pattern 240: Terminal portion
Claims (4)
A second sheet for shielding an antenna in a low frequency band by sequentially stacking at least one amorphous sheet having a narrow area to form a step with the first sheet;
A third sheet that shields heat from the upper surface of the second sheet;
A UV coating layer formed on an end surface of the second sheet; And
And a filler filling the outer surface of the coating layer.
GRAPHITE SHEET coated with GRAPHITE powder; And
And protective means for shielding an outer surface of the graphite sheet.
A second sheet producing step of sequentially laminating at least one amorphous sheet (AMORPHOUS SHEET) to produce a second sheet;
A third sheet producing step of producing a third sheet shielding the heat generation; And
And the second sheet is laminated on the substrate on which the at least one antenna pattern is formed so as to form a step between the first sheet and the third sheet,
The second sheet producing step
A lamination step of laminating at least one amorphous sheet;
A punching step of punching the first sheet so as to have a narrow area as compared with the first sheet;
Forming a coating layer by irradiating ultraviolet rays onto a cross section formed in the punching step; And
And filling the outer surface of the coating layer with a filling material to expand the coating layer by a predetermined area.
Wherein a protective means is laminated so as to surround the outer surface of a graphite sheet coated with a graphite powder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020150113294A KR101661596B1 (en) | 2015-08-11 | 2015-08-11 | Multi sheet for antenna |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150113294A KR101661596B1 (en) | 2015-08-11 | 2015-08-11 | Multi sheet for antenna |
Publications (1)
Publication Number | Publication Date |
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KR101661596B1 true KR101661596B1 (en) | 2016-10-05 |
Family
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Family Applications (1)
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KR1020150113294A KR101661596B1 (en) | 2015-08-11 | 2015-08-11 | Multi sheet for antenna |
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20070051299A (en) * | 2004-10-13 | 2007-05-17 | 돗빤호무즈가부시기가이샤 | Noncontact ic label and method and apparatus for manufacturing the same |
KR20080007460A (en) * | 2005-05-13 | 2008-01-21 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Radio frequency identification tags for use on metal or other conductive objects |
KR101185681B1 (en) | 2011-06-08 | 2012-09-24 | (주) 씨아이디티 | Antenna for both wireless power and near field communication in mobile |
KR20140008656A (en) * | 2012-07-11 | 2014-01-22 | 밉스테크널러지(주) | Sticker for rf transmission attachable to portable electronic apparatus or accessory |
KR20140103063A (en) | 2013-02-15 | 2014-08-25 | 주식회사 아모텍 | Electromagnetic wave absorption sheet, and antenna module having this |
KR20140109336A (en) | 2013-03-05 | 2014-09-15 | 주식회사 아모센스 | Composite Sheet for Shielding Magnetic Field and Electromagnetic Wave and Antenna Module Using the Same |
KR20150032382A (en) | 2013-09-16 | 2015-03-26 | (주)상아프론테크 | Ultra-thin and high-permeability magnetic sheet commonly used by wireless charging and near field communication, and method for manufacturing the same |
-
2015
- 2015-08-11 KR KR1020150113294A patent/KR101661596B1/en active IP Right Grant
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20070051299A (en) * | 2004-10-13 | 2007-05-17 | 돗빤호무즈가부시기가이샤 | Noncontact ic label and method and apparatus for manufacturing the same |
KR20080007460A (en) * | 2005-05-13 | 2008-01-21 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Radio frequency identification tags for use on metal or other conductive objects |
KR101185681B1 (en) | 2011-06-08 | 2012-09-24 | (주) 씨아이디티 | Antenna for both wireless power and near field communication in mobile |
KR20140008656A (en) * | 2012-07-11 | 2014-01-22 | 밉스테크널러지(주) | Sticker for rf transmission attachable to portable electronic apparatus or accessory |
KR20140103063A (en) | 2013-02-15 | 2014-08-25 | 주식회사 아모텍 | Electromagnetic wave absorption sheet, and antenna module having this |
KR20140109336A (en) | 2013-03-05 | 2014-09-15 | 주식회사 아모센스 | Composite Sheet for Shielding Magnetic Field and Electromagnetic Wave and Antenna Module Using the Same |
KR20150032382A (en) | 2013-09-16 | 2015-03-26 | (주)상아프론테크 | Ultra-thin and high-permeability magnetic sheet commonly used by wireless charging and near field communication, and method for manufacturing the same |
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