JP2011119819A - Magnetic body antenna, and portable terminal - Google Patents

Magnetic body antenna, and portable terminal Download PDF

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JP2011119819A
JP2011119819A JP2009273194A JP2009273194A JP2011119819A JP 2011119819 A JP2011119819 A JP 2011119819A JP 2009273194 A JP2009273194 A JP 2009273194A JP 2009273194 A JP2009273194 A JP 2009273194A JP 2011119819 A JP2011119819 A JP 2011119819A
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flexible substrate
adhesive sheet
magnetic
magnetic core
double
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JP5487919B2 (en
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Hiromitsu Ito
宏充 伊藤
Kuniaki Yosui
邦明 用水
Hiroyuki Kubo
浩行 久保
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Murata Manufacturing Co Ltd
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Murata Manufacturing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic body antenna capable of being thinned as a whole while maintaining the protecting and scattering preventing function of a magnetic body core, and to provide a portable terminal provided with the same. <P>SOLUTION: An antenna coil unit 301 is constituted so that the magnetic body core 30 and a flexible substrate 201 are stuck to each other by a single-sided adhesive sheet 41 for protection, a double-sided adhesive sheet 42 for flexible substrate attachment and a double-sided adhesive sheet 43 for flexible substrate attachment. With respect to the antenna coil unit 301, a double-sided adhesive sheet 44 for casing fixation is stuck to the second surface side of the magnetic body core 30, and thereby the magnetic body antenna 401 is configured. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、誘導電磁界を利用して近距離で無線通信するＲＦＩＤ（Radio Frequency Identification）システム等に用いられる磁性体アンテナ及びそれを備えた携帯端末に関するものである。   The present invention relates to a magnetic antenna used in an RFID (Radio Frequency Identification) system or the like that performs radio communication at a short distance using an induction electromagnetic field, and a portable terminal including the same.

ＲＦＩＤシステムで用いられる磁性体アンテナが特許文献１に開示されている。図１は特許文献１に示されている磁性体アンテナの平面図及び断面図である。この磁性体アンテナ（アンテナコイル）１０は、空芯コイル部１４が形成されたアンテナ基板１１と平行に平板状の磁性体コア（磁芯部材）１２を積層した状態で、アンテナ基板１１及び磁芯部材１２を封止部１７で被覆したものである。磁性体コア１２は焼結フェライトである。   A magnetic antenna used in an RFID system is disclosed in Patent Document 1. FIG. 1 is a plan view and a cross-sectional view of the magnetic antenna shown in Patent Document 1. FIG. The magnetic antenna (antenna coil) 10 includes an antenna substrate 11 and a magnetic core in a state where a flat magnetic core (magnetic core member) 12 is laminated in parallel with an antenna substrate 11 on which an air-core coil portion 14 is formed. The member 12 is covered with a sealing portion 17. The magnetic core 12 is sintered ferrite.

アンテナ基板１１は、例えばポリイミド等の絶縁材料でなるベースフィルム１３と、このベースフィルム１３の上に形成された銅又はアルミニウム等でなる渦巻き状の空芯コイル部１４と、この空芯コイル部１４の両端部に接続された外部接続端子１５とで構成されている。ベースフィルム１３の表裏面には絶縁材料でなるオーバーコート材が設けられている。   The antenna substrate 11 includes, for example, a base film 13 made of an insulating material such as polyimide, a spiral air core coil portion 14 made of copper or aluminum formed on the base film 13, and the air core coil portion 14. The external connection terminal 15 is connected to both ends of the. An overcoat material made of an insulating material is provided on the front and back surfaces of the base film 13.

特開２００４−３０４３７０号公報JP 2004-304370 A

特許文献１に示されているように、磁性体コアを封止部で封止することによって、焼結フェライトである磁性体コアが衝撃で割れたとしても、その飛散が防止できる。
しかし、このような焼結フェライトの飛散防止用の封止材で封止した構造では、封止材の分だけ全体の厚みが厚くなる。そのため、薄型化された電子機器内にこの磁性体アンテナを組み込む際に、組み込み先のスペースが確保できないという問題があった。 As shown in Patent Document 1, even if the magnetic core, which is sintered ferrite, is broken by impact, the magnetic core can be prevented from being scattered by sealing the magnetic core with a sealing portion.
However, in such a structure sealed with a sealing material for preventing scattering of sintered ferrite, the entire thickness is increased by the amount of the sealing material. For this reason, when the magnetic antenna is incorporated into a thin electronic device, there is a problem that a space for assembling cannot be secured.

特に、貫通孔の周囲に渦巻き状のコイル導体が設けられたフレキシブル基板を備え、その貫通孔に磁性体コアが挿入された磁性体アンテナにおいては、磁性体コアの両面にフレキシブル基板が存在することになり、薄型化の要請に対する対処が更に厳しいものとなる。   In particular, in a magnetic antenna provided with a flexible substrate in which a spiral coil conductor is provided around a through hole, and a magnetic core is inserted into the through hole, the flexible substrate must be present on both sides of the magnetic core. Therefore, the response to the demand for thinning becomes more severe.

そこで、この発明の目的は、磁性体コアの保護及び飛散防止機能を維持しつつ全体に薄型化できる磁性体アンテナ及びそれを備えた携帯端末を提供することにある。   SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic antenna that can be thinned as a whole while maintaining the protection and scattering prevention functions of a magnetic core, and a portable terminal equipped with the magnetic antenna.

前記課題を解決するために、この発明の磁性体アンテナは、巻回中心部を導体開口部とする渦巻き状のコイル導体が設けられ、前記導体開口部に貫通孔が形成されたフレキシブル基板と、前記貫通孔に挿入された板状の磁性体コアとを備え、前記磁性体コアの第１面側に保護用片面粘着シートが貼着され、前記磁性体コアの第２面側に筐体固定用両面粘着シートが貼付されている。   In order to solve the above problems, a magnetic antenna according to the present invention is provided with a flexible substrate in which a spiral coil conductor having a winding center portion as a conductor opening is provided, and a through hole is formed in the conductor opening, A plate-like magnetic core inserted into the through-hole, a protective single-sided adhesive sheet is attached to the first surface side of the magnetic core, and a housing is fixed to the second surface side of the magnetic core Double-sided pressure-sensitive adhesive sheet is attached.

この発明の携帯端末は、前記磁性体アンテナと、それを収納する筐体とを備え、前記磁性体アンテナが前記筐体固定用両面粘着シートで前記筐体の内面に貼着されたものである。   The portable terminal according to the present invention includes the magnetic antenna and a casing that houses the magnetic antenna, and the magnetic antenna is attached to the inner surface of the casing with the double-sided adhesive sheet for fixing the casing. .

例えば、前記片面粘着シートは前記磁性体コアの第１面に直接貼着され、前記筐体固定用両面粘着シートは、前記磁性体コアが前記フレキシブル基板の貫通孔を貫通した状態で、前記磁性体コアの第２面及び第２面上の前記フレキシブル基板を覆うように貼付されている。   For example, the single-sided adhesive sheet is directly attached to the first surface of the magnetic core, and the case-fixing double-sided adhesive sheet has the magnetic core penetrating through a through hole of the flexible substrate. Affixed to cover the second surface of the body core and the flexible substrate on the second surface.

また、例えば、前記磁性体コアの第２面にフレキシブル基板接着用両面粘着シートが貼付され、前記筐体固定用の両面粘着シートは、前記磁性体コアが前記フレキシブル基板の貫通孔を貫通した状態で、前記磁性体コアの第２面上の前記両面粘着シートの表面及び第２面上の前記フレキシブル基板を覆う。   Further, for example, a double-sided pressure-sensitive adhesive sheet for adhering a flexible substrate is affixed to the second surface of the magnetic core, and the double-sided pressure-sensitive adhesive sheet for fixing the housing is in a state where the magnetic material core penetrates the through hole of the flexible substrate Then, the surface of the double-sided pressure-sensitive adhesive sheet on the second surface of the magnetic core and the flexible substrate on the second surface are covered.

また、例えば、前記フレキシブル基板と前記磁性体コアの第１面側との対向面同士、及び前記フレキシブル基板と前記磁性体コアの第２面側との対向面同士が両面粘着シートで貼着され、前記筐体固定用両面粘着シートは、前記磁性体コアが前記フレキシブル基板の貫通孔を貫通した状態で、前記磁性体コアの第２面及び第２面上の前記フレキシブル基板を覆う。   Further, for example, the opposing surfaces of the flexible substrate and the first surface side of the magnetic core and the opposing surfaces of the flexible substrate and the second surface side of the magnetic core are attached with a double-sided adhesive sheet. The case-fixing double-sided pressure-sensitive adhesive sheet covers the second surface of the magnetic core and the flexible substrate on the second surface in a state where the magnetic core passes through the through hole of the flexible substrate.

また、例えば、前記フレキシブル基板と前記磁性体コアの第１面との対向面同士、及び前記フレキシブル基板と前記磁性体コアの第２面との対向面同士が両面粘着シートで直接貼着され、前記磁性体コアが前記フレキシブル基板の貫通孔を貫通した状態で、前記片面粘着シートは、前記磁性体コアの第１面及び第１面上の前記フレキシブル基板を覆うように貼付され、前記筐体固定用両面粘着シートは、前記磁性体コアの第２面及び第２面上の前記フレキシブル基板を覆うように貼付される。   Further, for example, the opposing surfaces of the flexible substrate and the first surface of the magnetic core, and the opposing surfaces of the flexible substrate and the second surface of the magnetic core are directly attached with a double-sided adhesive sheet, With the magnetic core passing through the through hole of the flexible substrate, the single-sided adhesive sheet is pasted so as to cover the first surface of the magnetic core and the flexible substrate on the first surface, and the casing The fixing double-sided pressure-sensitive adhesive sheet is attached so as to cover the second surface of the magnetic core and the flexible substrate on the second surface.

また、例えば、前記フレキシブル基板は、前記コイル導体の形成領域外に、前記磁性体コアが貫通するコイル導体形成領域外貫通孔を備え、前記磁性体コアは、前記フレキシブル基板の第１面から前記導体開口部側の貫通孔を貫通し、且つ前記フレキシブル基板の第２面から前記コイル導体形成領域外貫通孔を貫通し、且つ第１面が前記フレキシブル基板の第１面に対向し、第２面が前記フレキシブル基板の第２面に対向する状態に設けられる。   Further, for example, the flexible substrate includes a coil conductor formation region outside through-hole through which the magnetic core penetrates outside the coil conductor formation region, and the magnetic core is formed from the first surface of the flexible substrate. Penetrating through the through hole on the conductor opening side, penetrating from the second surface of the flexible substrate through the through hole outside the coil conductor forming region, the first surface facing the first surface of the flexible substrate, and the second The surface is provided to face the second surface of the flexible substrate.

前記磁性体コアは、例えば、複数に小片化された焼結磁性体であり、
前記保護用片面粘着シート、前記筐体固定用両面粘着シート、フレキシブル基板接着用両面粘着シートの少なくとも何れかは例えばポリエチレンテレフタレートを基材とするものである。 The magnetic body core is, for example, a sintered magnetic body divided into a plurality of pieces,
At least one of the protective single-sided pressure-sensitive adhesive sheet, the case-fixing double-sided pressure-sensitive adhesive sheet, and the flexible substrate-adhesive double-sided pressure-sensitive adhesive sheet is made of, for example, polyethylene terephthalate as a base material.

また、前記保護用片面粘着シート、前記筐体固定用両面粘着シート、フレキシブル基板接着用両面粘着シートの少なくとも何れかは例えばポリエチレンナフタレートを基材とするものである。   Further, at least one of the protective single-sided pressure-sensitive adhesive sheet, the housing-fixing double-sided pressure-sensitive adhesive sheet, and the flexible substrate-bonding double-sided pressure-sensitive adhesive sheet is made of, for example, polyethylene naphthalate.

この発明によれば、磁性体コア、フレキシブル基板、及びその他の粘着シートによる積層体全体の厚みが従来構造に比べて薄くなる。そのため、この磁性体アンテナを収納した携帯端末の薄型化・小型化が図れる。   According to this invention, the thickness of the whole laminated body by a magnetic body core, a flexible substrate, and another adhesive sheet becomes thin compared with the conventional structure. Therefore, it is possible to reduce the thickness and size of the mobile terminal that houses the magnetic antenna.

特許文献１に示されている磁性体アンテナの平面図及び断面図である。It is the top view and sectional drawing of the magnetic body antenna shown by patent document 1. FIG. 第１の実施形態に係る磁性体アンテナに備えるフレキシブル基板２０１の平面図である。It is a top view of the flexible substrate 201 with which the magnetic antenna which concerns on 1st Embodiment is equipped. 第１の実施形態に係る磁性体アンテナに備える磁性体コア３０及びフレキシブル基板２０１等の斜視図である。1 is a perspective view of a magnetic core 30 and a flexible substrate 201 provided in a magnetic antenna according to a first embodiment. 図４（Ａ）は、アンテナコイルユニット３０１と筐体固定用両面粘着シート４４との関係を示す図、図４（Ｂ）は磁性体アンテナ４０１の構成図である。4A is a diagram showing the relationship between the antenna coil unit 301 and the double-sided adhesive sheet 44 for fixing the housing, and FIG. 4B is a configuration diagram of the magnetic antenna 401. 第２の実施形態に係る磁性体アンテナに備える磁性体コア３０及びフレキシブル基板２０２等の斜視図である。It is a perspective view of the magnetic core 30 and the flexible substrate 202 provided in the magnetic antenna according to the second embodiment. 図６（Ａ）は、アンテナコイルユニット３０２と筐体固定用両面粘着シート４４との関係を示す図、図６（Ｂ）は磁性体アンテナ４０２の構成図である。6A is a diagram showing the relationship between the antenna coil unit 302 and the double-sided adhesive sheet 44 for fixing the housing, and FIG. 6B is a configuration diagram of the magnetic antenna 402. 第３の実施形態に係る磁性体アンテナに備える磁性体コア３０及びフレキシブル基板２０３等の斜視図である。It is a perspective view of the magnetic body core 30 with which the magnetic body antenna which concerns on 3rd Embodiment is equipped, the flexible substrate 203, etc. FIG. 図８（Ａ）は、アンテナコイルユニット３０３と筐体固定用両面粘着シート４４及び保護用片面粘着シート４１との関係を示す図、図８（Ｂ）は磁性体アンテナ４０３の構成図である。FIG. 8A is a diagram showing the relationship between the antenna coil unit 303, the case fixing double-sided adhesive sheet 44, and the protective single-sided adhesive sheet 41, and FIG. 8B is a configuration diagram of the magnetic antenna 403. 第４の実施形態に係る磁性体アンテナに備えるフレキシブル基板２０４の平面図である。It is a top view of the flexible substrate 204 with which the magnetic body antenna which concerns on 4th Embodiment is equipped. 第４の実施形態に係る磁性体アンテナに備える磁性体コア３０及びフレキシブル基板２０４等の斜視図である。It is a perspective view of the magnetic body core 30 with which the magnetic body antenna which concerns on 4th Embodiment is equipped, the flexible substrate 204, etc. FIG. 図１１（Ａ）は、アンテナコイルユニット３０４と筐体固定用両面粘着シート４４及び保護用片面粘着シート４１との関係を示す図、図１１（Ｂ）は磁性体アンテナ４０４の構成図である。FIG. 11A is a diagram showing the relationship between the antenna coil unit 304, the case-fixing double-sided adhesive sheet 44, and the protective single-sided adhesive sheet 41, and FIG. 11B is a configuration diagram of the magnetic antenna 404. 図１２（Ａ）は、第５の実施形態に係る磁性体アンテナに備える磁性体コア３０Ａの平面図、図１２（Ｂ）は、それに貼付されているフレキシブル基板接着用両面粘着シート４２、及び保護用片面粘着シート４１を備える、磁性体コア全体の断面図である。FIG. 12A is a plan view of a magnetic core 30A provided in the magnetic antenna according to the fifth embodiment, and FIG. 12B is a double-sided pressure-sensitive adhesive sheet 42 for bonding a flexible substrate attached to the magnetic core 30A. It is sectional drawing of the whole magnetic body core provided with the single-sided adhesive sheet 41 for use. 第６の実施形態に係る携帯端末６０１の主要部の断面図である。It is sectional drawing of the principal part of the portable terminal 601 which concerns on 6th Embodiment.

《第１の実施形態》
図２は、第１の実施形態に係る磁性体アンテナに備えるフレキシブル基板２０１の平面図である。
図２に示されているように、フレキシブル基板２０１の基材２１には、巻回中心部を導体開口部ＣＣとする渦巻き状のコイル導体２２が設けられ、導体開口部ＣＣに貫通孔Ａ１が形成されている。 << First Embodiment >>
FIG. 2 is a plan view of the flexible substrate 201 provided in the magnetic antenna according to the first embodiment.
As shown in FIG. 2, the base material 21 of the flexible substrate 201 is provided with a spiral coil conductor 22 having a winding center portion as a conductor opening CC, and a through hole A1 is formed in the conductor opening CC. Is formed.

図３は、第１の実施形態に係る磁性体アンテナに備える磁性体コア３０及びフレキシブル基板２０１等の斜視図である。
磁性体コア３０は矩形板形状に成形されたフェライトのコアである。この磁性体コア３０の第１面（図３の状態で下面）に保護用片面粘着シート４１が直接貼着される。また、磁性体コア３０の第２面（図３の状態で上面）にフレキシブル基板接着用両面粘着シート４２が貼付される。 FIG. 3 is a perspective view of the magnetic core 30 and the flexible substrate 201 provided in the magnetic antenna according to the first embodiment.
The magnetic core 30 is a ferrite core formed in a rectangular plate shape. The protective single-sided adhesive sheet 41 is directly attached to the first surface (the lower surface in the state of FIG. 3) of the magnetic core 30. Further, a double-sided pressure-sensitive adhesive sheet 42 for bonding a flexible substrate is attached to the second surface (upper surface in the state of FIG. 3) of the magnetic core 30.

フレキシブル基板２０１の第２面（図３の状態で上面）のうち、磁性体コア３０側との対向面にはフレキシブル基板接着用両面粘着シート４３が貼付されている。
図３に示した各部材は次のように組み立てる。先ず、磁性体コア３０に保護用片面粘着シート４１及びフレキシブル基板接着用両面粘着シート４２を貼付する。一方、フレキシブル基板２０１にフレキシブル基板接着用両面粘着シート４３を貼付する。そして、保護用片面粘着シート４１及びフレキシブル基板接着用両面粘着シート４２が貼付された磁性体コア３０を、フレキシブル基板２０１の貫通孔Ａ１に挿入し、フレキシブル基板接着用両面粘着シート４３及びフレキシブル基板接着用両面粘着シート４２を介して、フレキシブル基板２０１を磁性体コア３０に貼着する。これによって、磁性体コア３０及びフレキシブル基板２０１を備えるアンテナコイルユニットを構成する。 Of the second surface (upper surface in the state of FIG. 3) of the flexible substrate 201, a double-sided pressure-sensitive adhesive sheet 43 for bonding a flexible substrate is affixed to the surface facing the magnetic core 30 side.
Each member shown in FIG. 3 is assembled as follows. First, the protective single-sided adhesive sheet 41 and the flexible substrate-adhesive double-sided adhesive sheet 42 are affixed to the magnetic core 30. On the other hand, the double-sided pressure-sensitive adhesive sheet 43 for bonding flexible substrates is attached to the flexible substrate 201. Then, the magnetic core 30 to which the protective single-sided adhesive sheet 41 and the flexible substrate adhesive double-sided adhesive sheet 42 are attached is inserted into the through hole A1 of the flexible substrate 201, and the flexible substrate adhesive double-sided adhesive sheet 43 and the flexible substrate adhesive are attached. The flexible substrate 201 is attached to the magnetic core 30 through the double-sided adhesive sheet 42 for use. Thus, an antenna coil unit including the magnetic core 30 and the flexible substrate 201 is configured.

図４（Ａ）、図４（Ｂ）は、前記アンテナコイルユニット３０１と筐体固定用両面粘着シート４４との関係を示す図である。
アンテナコイルユニット３０１は、既に述べたとおり、磁性体コア３０とフレキシブル基板２０１が、保護用片面粘着シート４１、フレキシブル基板接着用両面粘着シート４２、及びフレキシブル基板接着用両面粘着シート４３で互いに貼着されたユニットである。 4A and 4B are views showing the relationship between the antenna coil unit 301 and the double-sided pressure-sensitive adhesive sheet 44 for fixing the housing.
As described above, in the antenna coil unit 301, the magnetic core 30 and the flexible substrate 201 are attached to each other by the protective single-sided adhesive sheet 41, the flexible substrate-adhesive double-sided adhesive sheet 42, and the flexible substrate-adhesive double-sided adhesive sheet 43. Unit.

このアンテナコイルユニット３０１に対して、磁性体コア３０の第２面側に筐体固定用両面粘着シート４４が貼付される。すなわち、筐体固定用両面粘着シート４４は、磁性体コア３０がフレキシブル基板２０１の貫通孔を貫通した状態で、磁性体コア３０の第２面及び第２面上のフレキシブル基板２０１を覆うように貼付される。
このようにして、図４（Ｂ）に示す磁性体アンテナ４０１が構成される。 A case fixing double-sided pressure-sensitive adhesive sheet 44 is attached to the antenna coil unit 301 on the second surface side of the magnetic core 30. That is, the case fixing double-sided pressure-sensitive adhesive sheet 44 covers the second surface of the magnetic core 30 and the flexible substrate 201 on the second surface in a state where the magnetic core 30 penetrates the through hole of the flexible substrate 201. Affixed.
In this way, the magnetic antenna 401 shown in FIG. 4B is configured.

なお、前記保護用片面粘着シート４１、フレキシブル基板接着用両面粘着シート４２、筐体固定用両面粘着シート４４の少なくとも何れかはポリエチレンテレフタレート又はポリエチレンナフタレートを基材とし、その表面に粘着層が形成されたシートである。   At least one of the protective single-sided pressure-sensitive adhesive sheet 41, the double-sided pressure-sensitive adhesive sheet for bonding a flexible substrate 42, and the double-sided pressure-sensitive adhesive sheet for housing fixing 44 is made of polyethylene terephthalate or polyethylene naphthalate, and an adhesive layer is formed on the surface. Sheet.

ポリエチレンテレフタレート基材のテープは安価であり、かつ弾性や剛性が強いため、薄くても複数に小片化された焼結フェライトの形状保持が可能となる。   Since a polyethylene terephthalate-based tape is inexpensive and has high elasticity and rigidity, it is possible to maintain the shape of sintered ferrite divided into a plurality of pieces even if it is thin.

また、ポリエチレンナフタレートを基材とする粘着シートは、ポリエチレンテレフタレートを基材とするものより高価であるが、耐熱性、耐湿性が高く、高温や高湿環境化で使用する場合の信頼性が高くなる。
このことは以降に示す各実施形態においても同様である。 In addition, the pressure-sensitive adhesive sheet based on polyethylene naphthalate is more expensive than that based on polyethylene terephthalate, but has high heat resistance and moisture resistance, and is reliable when used in high temperature and high humidity environments. Get higher.
The same applies to each embodiment described below.

《第２の実施形態》
図５は、第２の実施形態に係る磁性体アンテナに備える磁性体コア３０及びフレキシブル基板２０２等の斜視図である。
磁性体コア３０は矩形板形状に成形されたフェライトのコアである。この磁性体コア３０の第１面（図５の状態で下面）に保護用片面粘着シート４１が直接貼着される。 << Second Embodiment >>
FIG. 5 is a perspective view of the magnetic core 30 and the flexible substrate 202 provided in the magnetic antenna according to the second embodiment.
The magnetic core 30 is a ferrite core formed in a rectangular plate shape. The protective single-sided adhesive sheet 41 is directly attached to the first surface (the lower surface in the state of FIG. 5) of the magnetic core 30.

フレキシブル基板２０２の第２面（図５の状態で上面）のうち、磁性体コア３０側との対向面にはフレキシブル基板接着用両面粘着シート４３が貼付されている。また、フレキシブル基板２０２の第１面（図５の状態で下面）のうち、磁性体コア３０側との対向面にはフレキシブル基板接着用両面粘着シート４５が貼付されている。
図５に示した各部材は次のように組み立てる。先ず、磁性体コア３０に保護用片面粘着シート４１を貼付する。一方、フレキシブル基板２０２にフレキシブル基板接着用両面粘着シート４３，４５を貼付する。そして、保護用片面粘着シート４１が貼付された磁性体コア３０を、フレキシブル基板２０２の貫通孔Ａ１に挿入し、フレキシブル基板接着用両面粘着シート４３，４５を介して、フレキシブル基板２０２を磁性体コア３０に貼着する。これによって、磁性体コア３０及びフレキシブル基板２０２を備えるアンテナコイルユニットを構成する。 Of the second surface (upper surface in the state of FIG. 5) of the flexible substrate 202, a double-sided pressure-sensitive adhesive sheet 43 for bonding a flexible substrate is affixed to the surface facing the magnetic core 30 side. Further, a double-sided pressure-sensitive adhesive sheet 45 for adhering to the flexible substrate is affixed to the surface facing the magnetic core 30 side of the first surface (the lower surface in the state of FIG. 5) of the flexible substrate 202.
Each member shown in FIG. 5 is assembled as follows. First, the protective single-sided adhesive sheet 41 is attached to the magnetic core 30. On the other hand, the double-sided pressure-sensitive adhesive sheets 43 and 45 for bonding a flexible substrate are attached to the flexible substrate 202. Then, the magnetic core 30 to which the protective single-sided adhesive sheet 41 is attached is inserted into the through hole A1 of the flexible substrate 202, and the flexible substrate 202 is attached to the magnetic core through the flexible substrate-adhesive sheets 43 and 45. Stick to 30. Thus, an antenna coil unit including the magnetic core 30 and the flexible substrate 202 is configured.

図６（Ａ）、図６（Ｂ）は、前記アンテナコイルユニット３０２と筐体固定用両面粘着シート４４との関係を示す図である。
アンテナコイルユニット３０２は、磁性体コア３０とフレキシブル基板２０２が、保護用片面粘着シート４１及びフレキシブル基板接着用両面粘着シート４３，４５で互いに貼着されたユニットである。 6A and 6B are views showing the relationship between the antenna coil unit 302 and the double-sided pressure-sensitive adhesive sheet 44 for fixing the housing.
The antenna coil unit 302 is a unit in which the magnetic core 30 and the flexible substrate 202 are bonded to each other with the protective single-sided adhesive sheet 41 and the flexible substrate-adhesive double-sided adhesive sheets 43 and 45.

このアンテナコイルユニット３０２に対して、磁性体コア３０の第２面側に筐体固定用両面粘着シート４４が貼付される。すなわち、筐体固定用両面粘着シート４４は、磁性体コア３０がフレキシブル基板２０２の貫通孔を貫通した状態で、磁性体コア３０の第２面及び第２面上のフレキシブル基板２０２を覆うように貼付される。
このようにして、図６（Ｂ）に示す磁性体アンテナ４０２が構成される。 A case fixing double-sided pressure-sensitive adhesive sheet 44 is attached to the antenna coil unit 302 on the second surface side of the magnetic core 30. That is, the case fixing double-sided pressure-sensitive adhesive sheet 44 covers the second surface of the magnetic core 30 and the flexible substrate 202 on the second surface in a state where the magnetic core 30 penetrates the through hole of the flexible substrate 202. Affixed.
In this way, the magnetic antenna 402 shown in FIG. 6B is configured.

第２の実施形態による磁性体アンテナ４０２では、第１の実施形態で示した磁性体アンテナ４０１より薄型化できる。また、アンテナコイルユニット３０２の状態で表面に粘着面が露出していないので組立作業性が向上する。   The magnetic antenna 402 according to the second embodiment can be made thinner than the magnetic antenna 401 shown in the first embodiment. Further, since the adhesive surface is not exposed on the surface in the state of the antenna coil unit 302, the assembly workability is improved.

《第３の実施形態》
図７は、第３の実施形態に係る磁性体アンテナに備える磁性体コア３０及びフレキシブル基板２０３等の斜視図である。
磁性体コア３０は矩形板形状に成形されたフェライトのコアである。 << Third Embodiment >>
FIG. 7 is a perspective view of the magnetic core 30 and the flexible substrate 203 provided in the magnetic antenna according to the third embodiment.
The magnetic core 30 is a ferrite core formed in a rectangular plate shape.

フレキシブル基板２０３の第２面（図７の状態で上面）のうち、磁性体コア３０側との対向面にはフレキシブル基板接着用両面粘着シート４３が貼付されている。また、フレキシブル基板２０３の第１面（図７の状態で下面）のうち、磁性体コア３０側との対向面にはフレキシブル基板接着用両面粘着シート４５が貼付されている。これによって、磁性体コア３０及びフレキシブル基板２０３を備えるアンテナコイルユニットを構成する。
図８（Ａ）、図８（Ｂ）は、前記アンテナコイルユニット３０３と筐体固定用両面粘着シート４４及び保護用片面粘着シート４１との関係を示す図である。
アンテナコイルユニット３０３は、磁性体コア３０とフレキシブル基板２０３が、フレキシブル基板接着用両面粘着シート４３，４５で互いに貼着されたユニットである。 Of the second surface (upper surface in the state of FIG. 7) of the flexible substrate 203, a double-sided pressure-sensitive adhesive sheet 43 for bonding a flexible substrate is affixed to the surface facing the magnetic core 30 side. In addition, a double-sided pressure-sensitive adhesive sheet 45 for bonding a flexible substrate is attached to a surface of the first surface (the lower surface in the state of FIG. 7) of the flexible substrate 203 that faces the magnetic core 30 side. Thus, an antenna coil unit including the magnetic core 30 and the flexible substrate 203 is configured.
FIGS. 8A and 8B are views showing the relationship between the antenna coil unit 303, the case fixing double-sided pressure-sensitive adhesive sheet 44, and the protective single-sided pressure-sensitive adhesive sheet 41. FIG.
The antenna coil unit 303 is a unit in which the magnetic core 30 and the flexible substrate 203 are bonded to each other with the double-sided adhesive sheets 43 and 45 for bonding flexible substrates.

このアンテナコイルユニット３０３に対して、磁性体コア３０の第１面側（図８の状態で下面側）に保護用片面粘着シート４１が貼付される。すなわち、保護用片面粘着シート４１は、磁性体コア３０がフレキシブル基板２０３の貫通孔を貫通した状態で、磁性体コア３０の第１面及び第１面上のフレキシブル基板２０３を覆うように貼付される。また、磁性体コア３０の第２面側（図８の状態で上面側）に筐体固定用両面粘着シート４４が貼付される。すなわち、筐体固定用両面粘着シート４４は、磁性体コア３０がフレキシブル基板２０３の貫通孔を貫通した状態で、磁性体コア３０の第２面及び第２面上のフレキシブル基板２０３を覆うように貼付される。
このようにして、図８（Ｂ）に示す磁性体アンテナ４０３が構成される。 A protective single-sided adhesive sheet 41 is attached to the first side of the magnetic core 30 (the lower side in the state of FIG. 8) with respect to the antenna coil unit 303. That is, the protective single-sided adhesive sheet 41 is pasted so as to cover the first surface of the magnetic core 30 and the flexible substrate 203 on the first surface in a state where the magnetic core 30 penetrates the through hole of the flexible substrate 203. The Moreover, the double-sided pressure-sensitive adhesive sheet 44 for fixing the housing is affixed to the second surface side of the magnetic core 30 (upper surface side in the state of FIG. 8). That is, the case fixing double-sided pressure-sensitive adhesive sheet 44 covers the second surface of the magnetic core 30 and the flexible substrate 203 on the second surface in a state where the magnetic core 30 penetrates the through hole of the flexible substrate 203. Affixed.
In this way, the magnetic antenna 403 shown in FIG. 8B is configured.

第３の実施形態による磁性体アンテナ４０３では、第２の実施形態で示した磁性体アンテナ４０２より薄型化できる。また、アンテナコイルユニット３０３の状態で表面に粘着面が露出していないので組立作業性が向上する。   The magnetic antenna 403 according to the third embodiment can be made thinner than the magnetic antenna 402 shown in the second embodiment. Further, since the adhesive surface is not exposed on the surface in the state of the antenna coil unit 303, the assembly workability is improved.

また、フレキシブル基板２０３が保護用片面粘着シート４１で保護されるので、フレキシブル基板２０３の電極の絶縁が強化される。   Further, since the flexible substrate 203 is protected by the protective single-sided adhesive sheet 41, the insulation of the electrodes of the flexible substrate 203 is reinforced.

《第４の実施形態》
図９は、第４の実施形態に係る磁性体アンテナに備えるフレキシブル基板２０４の平面図である。
図９に示されているように、フレキシブル基板２０４には、巻回中心部を導体開口部ＣＣとする渦巻き状のコイル導体２２が設けられ、導体開口部ＣＣに貫通孔Ａ１が形成されている。また、フレキシブル基板２０４には、コイル導体２２の形成領域外に、磁性体コアが貫通するコイル導体形成領域外貫通孔Ａ２を備えている。 << Fourth Embodiment >>
FIG. 9 is a plan view of the flexible substrate 204 provided in the magnetic antenna according to the fourth embodiment.
As shown in FIG. 9, the flexible substrate 204 is provided with a spiral coil conductor 22 having a winding center portion as a conductor opening CC, and a through hole A1 is formed in the conductor opening CC. . In addition, the flexible substrate 204 is provided with a through hole A2 outside the coil conductor formation region through which the magnetic core penetrates outside the formation region of the coil conductor 22.

図１０は、第４の実施形態に係る磁性体アンテナに備える磁性体コア３０及びフレキシブル基板２０４等の斜視図である。
磁性体コア３０は矩形板形状に成形されたフェライトのコアである。フレキシブル基板２０４の第１面（図１０の状態で下面）のうち、磁性体コア３０との対向面にはフレキシブル基板接着用両面粘着シート４５，４６が貼付されている。 FIG. 10 is a perspective view of the magnetic core 30 and the flexible substrate 204 provided in the magnetic antenna according to the fourth embodiment.
The magnetic core 30 is a ferrite core formed in a rectangular plate shape. Of the first surface of the flexible substrate 204 (the lower surface in the state of FIG. 10), the double-sided pressure-sensitive adhesive sheets 45 and 46 for bonding the flexible substrate are attached to the surface facing the magnetic core 30.

磁性体コア３０は、フレキシブル基板２０４の第１面（図１０の状態で下面）から導体開口部側の貫通孔Ａ１を貫通し、且つフレキシブル基板２０４の第２面からコイル導体形成領域外貫通孔Ａ２を貫通するように配置される。これによって、磁性体コア３０及びフレキシブル基板２０４を備えるアンテナコイルユニットを構成する。   The magnetic core 30 penetrates the through hole A1 on the conductor opening side from the first surface (the lower surface in the state of FIG. 10) of the flexible substrate 204, and the coil conductor formation region outer through hole from the second surface of the flexible substrate 204. It arrange | positions so that A2 may be penetrated. Thus, an antenna coil unit including the magnetic core 30 and the flexible substrate 204 is configured.

図１１（Ａ）、図１１（Ｂ）は、前記アンテナコイルユニット３０４と筐体固定用両面粘着シート４４及び保護用片面粘着シート４１との関係を示す図である。
アンテナコイルユニット３０４は、磁性体コア３０とフレキシブル基板２０４が、フレキシブル基板接着用両面粘着シート４５，４６で互いに貼着されたユニットである。フレキシブル基板２０４はフレキシブル基板接着用両面粘着シート４５，４６を介して磁性体コア３０に貼付されている。すなわち、磁性体コア３０の第１面がフレキシブル基板２０４の第１面に対向し、磁性体コア３０の第２面がフレキシブル基板２０４の第２面に対向する状態で一体化されている。 11A and 11B are views showing the relationship between the antenna coil unit 304, the case fixing double-sided pressure-sensitive adhesive sheet 44, and the protective single-sided pressure-sensitive adhesive sheet 41. FIG.
The antenna coil unit 304 is a unit in which the magnetic core 30 and the flexible substrate 204 are attached to each other with the double-sided adhesive sheets 45 and 46 for bonding a flexible substrate. The flexible substrate 204 is affixed to the magnetic core 30 via the flexible substrate adhesive double-sided pressure-sensitive adhesive sheets 45 and 46. That is, the first surface of the magnetic core 30 is integrated with the first surface of the flexible substrate 204 and the second surface of the magnetic core 30 is integrated with the second surface of the flexible substrate 204.

このアンテナコイルユニット３０４に対して、磁性体コア３０の第１面側（図１１の状態で下面側）に保護用片面粘着シート４１が貼付される。また、磁性体コア３０の第２面側（図１１の状態で上面側）に筐体固定用両面粘着シート４４が貼付される。
このようにして、図１１（Ｂ）に示す磁性体アンテナ４０４が構成される。 A protective single-sided adhesive sheet 41 is attached to the antenna coil unit 304 on the first surface side of the magnetic core 30 (the lower surface side in the state of FIG. 11). Moreover, the double-sided pressure-sensitive adhesive sheet 44 for fixing the housing is affixed to the second surface side of the magnetic core 30 (upper surface side in the state of FIG. 11).
In this way, the magnetic antenna 404 shown in FIG.

第４の実施形態による磁性体アンテナ４０４では、さらに薄型化できる。また、アンテナコイルユニット３０３の状態で表面に粘着面が露出していないので組立作業性が向上する。   The magnetic antenna 404 according to the fourth embodiment can be further reduced in thickness. Further, since the adhesive surface is not exposed on the surface in the state of the antenna coil unit 303, the assembly workability is improved.

《第５の実施形態》
図１２（Ａ）は、第５の実施形態に係る磁性体アンテナに備える磁性体コア３０Ａの平面図、図１２（Ｂ）は、それに貼付されているフレキシブル基板接着用両面粘着シート４２、及び保護用片面粘着シート４１を備える、磁性体コア全体の断面図である。 << Fifth Embodiment >>
FIG. 12A is a plan view of a magnetic core 30A provided in the magnetic antenna according to the fifth embodiment, and FIG. 12B is a double-sided pressure-sensitive adhesive sheet 42 for bonding a flexible substrate attached to the magnetic core 30A. It is sectional drawing of the whole magnetic body core provided with the single-sided adhesive sheet 41 for use.

図３に示した第１の実施形態と異なるのは、磁性体コア３０Ａの構造である。図１２に示す磁性体コア３０Ａは、焼結磁性体の両面をフレキシブル基板接着用両面粘着シート４２及び保護用片面粘着シート４１でラミネートした後、焼結磁性体を複数の小片に分割したものである。   The difference from the first embodiment shown in FIG. 3 is the structure of the magnetic core 30A. A magnetic core 30A shown in FIG. 12 is obtained by laminating a sintered magnetic body into a plurality of small pieces after laminating both sides of a sintered magnetic body with a double-sided adhesive sheet 42 for flexible substrate bonding and a protective single-sided adhesive sheet 41. is there.

このような構成により、磁性体コア３０Ａ全体で柔軟性をもつことになる。そのため、この磁性体コア３０Ａを備えた磁性体アンテナは、フレキシブル基板や各粘着シートの厚み分の段差を無くすように変形する。また、例えば携帯端末の筐体内の単一平面に限らずに、筐体の内面に沿って設けることができる。したがって種々の形状の筐体内に容易に組み込める。   With such a configuration, the entire magnetic core 30A has flexibility. Therefore, the magnetic antenna provided with the magnetic core 30A is deformed so as to eliminate a step corresponding to the thickness of the flexible substrate or each adhesive sheet. Further, for example, it can be provided along the inner surface of the casing, not limited to a single plane in the casing of the mobile terminal. Therefore, it can be easily assembled in various shapes of housings.

《第６の実施形態》
図１３は第６の実施形態に係る携帯端末６０１の主要部の断面図である。この携帯端末６０１は、磁性体アンテナ４０５、基板５０、及び筐体６０を備えている。磁性体アンテナ４０５は筐体６０の内面に貼付されている。 << Sixth Embodiment >>
FIG. 13 is a cross-sectional view of a main part of a mobile terminal 601 according to the sixth embodiment. The mobile terminal 601 includes a magnetic antenna 405, a substrate 50, and a housing 60. The magnetic antenna 405 is affixed to the inner surface of the housing 60.

磁性体アンテナ４０５は、図８に示した第３の実施形態に係る磁性体アンテナ４０３に第５の実施形態で示した磁性体コア３０Ａを適用したものである。そのため、磁性体コア３０Ａの変形によって筐体固定用両面粘着シート４４は一平面となって、その全面で筐体６０の内面に貼付される。   The magnetic antenna 405 is obtained by applying the magnetic core 30A shown in the fifth embodiment to the magnetic antenna 403 according to the third embodiment shown in FIG. Therefore, the case fixing double-sided pressure-sensitive adhesive sheet 44 becomes a flat surface due to the deformation of the magnetic core 30A, and is adhered to the inner surface of the case 60 over the entire surface.

磁性体アンテナ４０５のフレキシブル基板２０３に形成されている端子電極は基板５０上の接続端子に電気的に接続される。又は、基板５０にピンやバネ端子などのスプリングプローブを設けて、スプリングプローブが磁性体アンテナ４０５のフレキシブル基板上の端子電極に導通するようにしてもよい。   The terminal electrodes formed on the flexible substrate 203 of the magnetic antenna 405 are electrically connected to the connection terminals on the substrate 50. Alternatively, a spring probe such as a pin or a spring terminal may be provided on the substrate 50 so that the spring probe is electrically connected to the terminal electrode on the flexible substrate of the magnetic antenna 405.

基板５０にグランド電極が広がって形成されている場合には、図１３において破線の矢印で示す磁束が通り、フレキシブル基板２０３に形成されているコイル導体の導体開口部を磁束が抜けることになる。   When the ground electrode is formed so as to spread on the substrate 50, the magnetic flux indicated by the dashed arrow in FIG. 13 passes and the magnetic flux is released from the conductor opening of the coil conductor formed on the flexible substrate 203.

Ａ１…貫通孔
Ａ２…コイル導体形成領域外貫通孔
ＣＣ…導体開口部
２１…基材
２２…コイル導体
３０，３０Ａ…磁性体コア
４１…保護用片面粘着シート
４２，４３，４５，４６…フレキシブル基板接着用両面粘着シート
４４…筐体固定用両面粘着シート
５０…基板
６０…筐体
２０１〜２０４…フレキシブル基板
３０１〜３０４…アンテナコイルユニット
４０１〜４０５…磁性体アンテナ
６０１…携帯端末 A1 ... through hole A2 ... coil conductor forming region outer through hole CC ... conductor opening 21 ... base material 22 ... coil conductors 30, 30A ... magnetic core 41 ... protective single-sided adhesive sheets 42, 43, 45, 46 ... flexible substrate Double-sided pressure-sensitive adhesive sheet for bonding 44 ... Double-sided pressure-sensitive adhesive sheet for case fixing 50 ... Board 60 ... Cases 201 to 204 ... Flexible boards 301 to 304 ... Antenna coil units 401 to 405 ... Magnetic antenna 601 ... Mobile terminal

Claims (10)

巻回中心部を導体開口部とする渦巻き状のコイル導体が設けられ、前記導体開口部に貫通孔が形成されたフレキシブル基板と、前記貫通孔に挿入された板状の磁性体コアとを備えた磁性体アンテナにおいて、
前記磁性体コアの第１面側に保護用片面粘着シートが貼着され、
前記磁性体コアの第２面側に筐体固定用両面粘着シートが貼付された磁性体アンテナ。 A coil-shaped coil conductor having a winding center portion as a conductor opening is provided, and includes a flexible substrate in which a through hole is formed in the conductor opening, and a plate-like magnetic core inserted in the through hole. In the magnetic antenna
A protective single-sided adhesive sheet is attached to the first surface side of the magnetic core,
A magnetic antenna in which a double-sided pressure-sensitive adhesive sheet for housing fixing is affixed to the second surface side of the magnetic core. 前記保護用片面粘着シートは前記磁性体コアの第１面に直接貼着され、
前記筐体固定用両面粘着シートは、前記磁性体コアが前記フレキシブル基板の貫通孔を貫通した状態で、前記磁性体コアの第２面及び第２面上の前記フレキシブル基板を覆うように貼付された、請求項１に記載の磁性体アンテナ。 The protective single-sided adhesive sheet is directly attached to the first surface of the magnetic core,
The double-sided pressure-sensitive adhesive sheet for fixing the casing is attached so as to cover the second surface of the magnetic core and the flexible substrate on the second surface in a state where the magnetic core penetrates the through hole of the flexible substrate. The magnetic antenna according to claim 1. 前記磁性体コアの第２面にフレキシブル基板接着用両面粘着シートが貼付され、
前記筐体固定用両面粘着シートは、前記磁性体コアが前記フレキシブル基板の貫通孔を貫通した状態で、前記磁性体コアの第２面上の前記フレキシブル基板接着用両面粘着シートの表面及び第２面上の前記フレキシブル基板を覆う、請求項２に記載の磁性体アンテナ。 A double-sided pressure-sensitive adhesive sheet for bonding a flexible substrate is attached to the second surface of the magnetic core,
The case-fixing double-sided pressure-sensitive adhesive sheet includes a surface of the double-sided pressure-sensitive adhesive sheet for bonding a flexible substrate on a second surface of the magnetic material core and a second surface of the magnetic material core in a state where the magnetic material core penetrates the through hole of the flexible substrate. The magnetic antenna according to claim 2, which covers the flexible substrate on a surface. 前記フレキシブル基板と前記磁性体コアの第１面側との対向面同士、及び前記フレキシブル基板と前記磁性体コアの第２面側との対向面同士がフレキシブル基板接着用両面粘着シートで貼着され、
前記筐体固定用両面粘着シートは、前記磁性体コアが前記フレキシブル基板の貫通孔を貫通した状態で、前記磁性体コアの第２面及び第２面上の前記フレキシブル基板を覆う、請求項２に記載の磁性体アンテナ。 The opposing surfaces of the flexible substrate and the first surface side of the magnetic core, and the opposing surfaces of the flexible substrate and the second surface side of the magnetic core are attached with a double-sided adhesive sheet for bonding a flexible substrate. ,
The double-sided pressure-sensitive adhesive sheet for fixing the housing covers the second surface of the magnetic core and the flexible substrate on the second surface in a state where the magnetic core penetrates the through hole of the flexible substrate. The magnetic antenna described in 1. 前記フレキシブル基板と前記磁性体コアの第１面との対向面同士、及び前記フレキシブル基板と前記磁性体コアの第２面との対向面同士がフレキシブル基板接着用両面粘着シートで直接貼着され、
前記磁性体コアが前記フレキシブル基板の貫通孔を貫通した状態で、前記保護用片面粘着シートは、前記磁性体コアの第１面及び第１面上の前記フレキシブル基板を覆うように貼付され、前記筐体固定用両面粘着シートは、前記磁性体コアの第２面及び第２面上の前記フレキシブル基板を覆うように貼付された、請求項１に記載の磁性体アンテナ。 The opposing surfaces of the flexible substrate and the first surface of the magnetic core, and the opposing surfaces of the flexible substrate and the second surface of the magnetic core are directly attached with a double-sided adhesive sheet for bonding a flexible substrate,
With the magnetic core passing through the through hole of the flexible substrate, the protective single-sided adhesive sheet is pasted so as to cover the first surface of the magnetic core and the flexible substrate on the first surface, 2. The magnetic antenna according to claim 1, wherein the case fixing double-sided pressure-sensitive adhesive sheet is attached so as to cover the second surface of the magnetic core and the flexible substrate on the second surface. 前記フレキシブル基板は、前記コイル導体の形成領域外に、前記磁性体コアが貫通するコイル導体形成領域外貫通孔を備え、
前記磁性体コアは、前記フレキシブル基板の第１面から前記導体開口部側の貫通孔を貫通し、且つ前記フレキシブル基板の第２面から前記コイル導体形成領域外貫通孔を貫通し、且つ第１面が前記フレキシブル基板の第１面に対向し、第２面が前記フレキシブル基板の第２面に対向する状態に設けられた、請求項１に記載の磁性体アンテナ。 The flexible substrate includes a coil conductor forming region outside through-hole through which the magnetic core penetrates outside the coil conductor forming region,
The magnetic core passes through the through hole on the conductor opening side from the first surface of the flexible substrate, passes through the through hole outside the coil conductor formation region from the second surface of the flexible substrate, and the first 2. The magnetic antenna according to claim 1, wherein the magnetic antenna is provided with a surface facing the first surface of the flexible substrate and a second surface facing the second surface of the flexible substrate. 前記磁性体コアは、複数に小片化された焼結磁性体である、請求項１乃至６の何れかに記載の磁性体アンテナ。   The magnetic body antenna according to claim 1, wherein the magnetic core is a sintered magnetic body divided into a plurality of pieces. 前記保護用片面粘着シート、フレキシブル基板接着用両面粘着シート、前記筐体固定用両面粘着シート、の少なくとも何れかはポリエチレンテレフタレートを基材とするものである、請求項１乃至７の何れかに記載の磁性体アンテナ。   The at least any one of the said single-sided adhesive sheet for protection, the double-sided adhesive sheet for flexible substrate adhesion | attachment, and the said double-sided adhesive sheet for housing | casing fixation uses a polyethylene terephthalate as a base material in any one of Claim 1 thru | or 7. Magnetic antenna. 前記保護用片面粘着シート、フレキシブル基板接着用両面粘着シート、前記筐体固定用両面粘着シート、の少なくとも何れかはポリエチレンナフタレートを基材とするものである、請求項１乃至７の何れかに記載の磁性体アンテナ。   8. The protective single-sided pressure-sensitive adhesive sheet, the flexible substrate-bonding double-sided pressure-sensitive adhesive sheet, or the housing-fixing double-sided pressure-sensitive adhesive sheet, at least one of which is based on polyethylene naphthalate. The magnetic antenna described. 請求項１乃至９の何れかに記載の磁性体アンテナと、当該磁性体アンテナを収納する筐体とを備え、前記磁性体アンテナが前記筐体固定用両面粘着シートで前記筐体の内面に貼着された携帯端末。   A magnetic antenna according to any one of claims 1 to 9 and a housing for housing the magnetic antenna, wherein the magnetic antenna is attached to an inner surface of the housing with the housing fixing double-sided adhesive sheet. Wearable mobile device.
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