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JP4607294B2 - Non-contact IC card and manufacturing method thereof - Google Patents
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JP4607294B2 - Non-contact IC card and manufacturing method thereof - Google Patents

Non-contact IC card and manufacturing method thereof Download PDF

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Publication number
JP4607294B2
JP4607294B2 JP2000221560A JP2000221560A JP4607294B2 JP 4607294 B2 JP4607294 B2 JP 4607294B2 JP 2000221560 A JP2000221560 A JP 2000221560A JP 2000221560 A JP2000221560 A JP 2000221560A JP 4607294 B2 JP4607294 B2 JP 4607294B2
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film
contact
card
circuit board
winding coil
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JP2002042079A (en
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喜久 鶴田
今朝幸 増田
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株式会社ワカ製作所
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Priority to JP2000221560A priority Critical patent/JP4607294B2/en
Priority to PCT/JP2001/006239 priority patent/WO2002007989A1/en
Priority to AU2002224539A priority patent/AU2002224539A1/en
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Description

【0001】
【発明の属する技術分野】
本発明は、各種カード類、商品タグ、ラベル等に使用される非接触ICカード及びその製造方法に関し、特に、アンテナコイルを形成するための金属細線の位置決め構造及びその方法に関する。
【0002】
【従来の技術】
この種の非接触ICカードとして、図7に示すように、電子部品が実装された回路基板1と、該回路基板1に接続され、電磁結合、電波等の所定の媒体を介して情報を送受信するアンテナコイル2とを、被覆樹脂3により封止した構成のものが知られている(特開平9−1969号公報及び特開平9−1970号公報等参照)。
【0003】
このような非接触ICカードの構成部品のうちアンテナコイル2として、断面が円形または長方形(長円形)の銅線等の金属細線を渦巻き状に巻いた巻線コイルを用いる場合、従来では、巻線コイルを2枚の被覆樹脂フィルムのうち一方に形成し、形成された巻線コイルと前記回路基板とを該一方の被覆樹脂フィルムへの他方の被覆樹脂フィルムの貼り付けにより、巻線コイルと回路基板とを、被覆樹脂により封止するようにしている。
【0004】
しかし、このような非接触ICカードにあっては、被覆樹脂フィルム上において、銅線等の金属細線を渦巻き状に巻いて巻線コイルを形成する構造であるから、金属細線の巻線自体が難しいと共に、巻回された巻線コイルの形状を保持するするのも難しく、巻線コイルを正規の形状、例えば方形状等に正確に形成するのが困難な構造であり、特に、複雑な形状の巻線コイルの形成は極めて困難であった。
【0005】
このような問題を解決するため、被覆樹脂を、互いに熱融着される熱融着樹脂からなる2枚のフィルムから構成する一方、アンテナコイルを、一方のフィルムにおいて金属細線を位置決め手段により位置決めして所定形の渦巻き状に巻いた巻線コイルから構成し、該巻線コイルと前記回路基板と2枚のフィルム間に封止するようにした非接触ICカードが提案されている(特開平11−115360号公報参照)。
【0006】
【発明が解決しようとする課題】
しかしながら、従来の非接触ICカードにおいては、2枚のフィルムのうち一方に位置決め手段としての複数の針部材を差し込み、一方のフィルム上において金属細線を各針部材に順次掛けて所定形の渦巻き状に巻いた巻線コイルを形成するようにしており、前記針部材は、単に巻線コイルの方向転換部、すなわち、コーナ部分に位置しているだけであるから、巻線コイルの各巻回部における金属細線の間隔が製品によって一定せず、変動する虞があった。
【0007】
後述するが、この巻線コイルの各巻回部における金属細線の間隔の変動は、巻線コイルの線間容量Cpc(pF)を変動させ、モジュールとしての共振周波数fMOの変動量に影響する。
【0008】
例えば、金属細線同士が密着している場合、巻線コイルの線間容量が大きくなり、この線間容量は、絶縁皮膜厚さ、線径、巻状態により、大きく変化するため、アンテナコイル特性上、共振周波数の巾が広くなる。
【0009】
本発明は、上記のような課題を解決するためなされたものであり、特に、アンテナコイルを、一方のフィルムにおいて金属細線を針部材により位置決めして所定形の渦巻き状に巻いた巻線コイルから構成する際に、この針部材の配置構造により、モジュールとしての共振周波数の安定化を図った非接触ICカード及びその製造方法を提供することを目的とする。
【0010】
【課題を解決するための手段】
このため、請求項1に係る発明の非接触ICカードは、電子部品が実装された回路基板と、該回路基板に接続され、所定の媒体を介して情報を送受信するアンテナコイルとを、互いに熱融着される熱融着樹脂からなる被覆樹脂としての2枚のフィルムにより封止するようにした構成であって、前記アンテナコイルを、一方のフィルムにおいて金属細線を針部材により位置決めして多角形若しくはこれに類する形に渦巻き状に巻いた巻線コイルから構成し、該巻線コイルと前記回路基板とを、前記2枚のフィルム間に封止した非接触ICカードにおいて、前記針部材は、一方のフィルムに差し込まれて金属細線が順次掛けられ、かつ、巻線コイルと回路基板とを2枚のフィルム間に封止した後に、前記一方のフィルムから退去される構成である一方、該針部材は、前記一方のフィルムの各角部において、夫々内側が開いた略V字形をなすように多数所定の間隔で並び、かつ、隣り合う略V字形の対応する各針部材同士に掛けられる金属細線同士が、互いに所定の間隔を有するように各略V字形の配置を定めた構成であることを特徴とする。
【0011】
請求項2に係る発明は、前記巻線コイルは、略四角形であることを特徴とする。
【0012】
請求項3に係る発明は、前記2枚のフィルムは、アンテナコイル部分を覆う粘着剤を塗布したテープで構成されることを特徴とする。
【0013】
請求項4に係る発明は、前記2枚のフィルムの内、何れか一方がアンテナコイル部分を覆う粘着剤を塗布したテープで構成されることを特徴とする。
【0015】
請求項5に係る発明の非接触ICカードの製造方法は、電子部品が実装された回路基板と、該回路基板に接続され、所定の媒体を介して情報を送受信するアンテナコイルとを、互いに熱融着される熱融着樹脂からなる被覆樹脂としての2枚のフィルムにより封止するようにした非接触ICカードの製造方法であって、縦方向及び横方向に夫々往復スライド駆動される駆動部の上面に所定形に配置されて取り付けられ、夫々上方向に伸びる多数の針部材であって、夫々前記駆動部の上方に配設された下側と上側の2枚のフィルムのうちの下側のフィルムの各角部に対応する位置において、夫々内側が開いた略V字形をなすように夫々所定の間隔で並び、かつ、隣り合う略V字形の対応するもの同士を結ぶ線同士が、互いに所定の間隔を有するように各略V字形の配置を定めた多数の針部材を、前記駆動部の縦方向のスライドにより上動させて、前記下側のフィルムに差し込む工程と、前記下側のフィルム上において、金属細線を該下側のフィルムから突出する各針部材に順次掛けることにより多角形若しくはこれに類する形に渦巻き状に巻かれた前記巻線コイルを形成する工程と、前記下側のフィルムと駆動部とを夫々横方向にスライドし、前記各針部材に巻線コイルを保持したまま、該下側のフィルムの巻線コイルが形成された部分を所定長さ分移動する工程と、前記下側のフィルムの巻線コイルが形成された部分の移動位置で、該下側のフィルムに上側のフィルムを熱融着により貼り付けて、該巻線コイルと前記回路基板とを前記2枚のフィルム間に封止する工程と、前記巻線コイルと回路基板の封止が終了した後、前記各針部材を、駆動部の縦方向のスライドにより下動させて、前記下側のフィルムから退去させる工程と、前記各針部材を、駆動部の横方向のスライドにより前記下側のフィルムに差し込む位置まで移動復帰させる工程と、を含むことを特徴とする。
【0017】
請求項6に係る発明は、大きい1枚のフィルムから多数枚のフィルムを得て、多数枚の各フィルムから夫々巻線コイルと回路基板とを含んで構成された非接触ICカードを製造することを特徴とする。
【0018】
次に、かかる発明の作用について説明すると、請求項1に係る発明の非接触ICカード並びに請求項5に係る発明の非接触ICカードの製造方法によれば、一方のフィルムに差し込まれて、金属細線を位置決めするべく該金属細線が順次掛けられる針部材であって、巻線コイルと回路基板とを2枚のフィルム間に封止した後に、前記一方のフィルムから退去される構成である多数の針部材を、一方のフィルムの各角部において、夫々内側が開いた略V字形をなすように夫々所定の間隔で並べ、かつ、隣り合う略V字形の対応する各針部材同士に掛けられる金属細線同士が、互いに所定の間隔を有するように各略V字形の配置を定めるようにしたから、巻線コイルの各巻回部における金属細線の間隔が製品毎に一定となり、変動する虞がなく、この結果、製品毎の巻線コイルの共振周波数の変動が抑えられ、製品が安定化し、しかも、巻線コイルが正確に形成でき、ひいては、非接触ICカードの製造性を向上することができる。
【0019】
請求項2に係る発明において、巻線コイルが、略四角形に簡単、かつ、正確に形成される。
【0020】
請求項3及び4に係る発明において、前記2枚のフィルム又はその何れか一方を、アンテナコイル部分を覆う粘着剤を塗布したテープで構成したので、従来は、ICチップモジュール取り付け用の孔をフィルムに形成していたが、孔あけの必要なくなり工数と材料費の削減が図られる。
【0023】
請求項6に係る発明において、大きいフィルムから簡単な工程で多数の非接触ICカードが製造される。
【0024】
【発明の実施の形態】
以下、添付された図面を参照して本発明の実施の形態を詳述する。
【0025】
図1は、本発明に係る非接触ICカードにおけるアンテナコイルの一実施形態を示している。
【0026】
この非接触ICカードは、電子部品が実装された図示しない回路基板と、この回路基板に接続され、電磁結合、電波等の所定の媒体を介して情報を送受信するアンテナコイル11とを、被覆樹脂12により封止するように構成される。
【0027】
ここで、前記被覆樹脂12は、互いに熱融着される熱融着樹脂、例えば、ポリエステルからなる2枚のフィルムから構成される。
【0028】
アンテナコイル11は、一方のフィルムにおいて、金属細線としての銅線14Aを多数の針部材13により位置決めして多角形状若しくはこれに類する形状、本実施形態では、略四角形の渦巻き状に巻いた(平行巻き若しくは連続巻き)巻線コイル14から構成されており、巻線コイル14と回路基板とは2枚のフィルム間に封止される。
【0029】
なお、図1において、Sは巻線コイル14の巻始、Eはその巻終である。
【0030】
次に、図4は、本発明に係る非接触ICカードの製造方法を実行する製造装置の一例を示している。即ち、下側と上側の2枚のフィルム12A,12Bのうちの下側のフィルム12Aは巻取部15に巻き取られており、この巻取部15から図4の矢印に示す横方向に引き出されて伸び、図示しないフィルムスライド手段により図中右方向にスライドされる。また、上側のフィルム12Bは前記巻取部15の上方位置で、該巻取部15とは横方向に所定距離オフセットされた位置に配設された巻取部16に巻き取られており、この巻取部16から下側のフィルム12Aの伸びる方向と同じ図4の矢印に示す横方向に引き出されて伸び、図示しないフィルムスライド手段により図中右方向にスライドされる。
【0031】
前記下側のフィルム12Aの巻取部15近傍の下方位置には、図4の矢印に示す如く縦方向及び横方向にそれぞれ往復スライド駆動する駆動部17が配設される。この駆動部17の上面には、それぞれ上方向に伸びる多数の針部材13が取り付けられている。この場合、多数の針部材13は、図1及び図2に示すように、下側のフィルム12A(図4参照)の各角部に対応する位置において、夫々内側が開いた略V字形をなすように夫々所定の間隔で並び、かつ、隣り合う略V字形の対応する各針部材13同士に掛けられる銅線14A同士が、互いに所定の間隔を有するように各略V字形の配置を定めている。
【0032】
なお、例えば、略V字形の角度θは、70度である。
【0034】
かかる構成の製造装置の作用に基づいて、本発明に係る非接触ICカードの製造方法について説明する。先ず、各針部材13を、図4のAで示す元位置にある駆動部17の同図の上側の矢印に示すような上方向のスライド駆動により上動させて、下側のフィルム12Aに差し込む(本発明の非接触ICカードの製造方法における、針部材を差し込む工程)。
【0035】
次に、下側のフィルム12A上において、銅線14Aを該下側のフィルム12Aから突出する各針部材13に順次掛けることにより所定形(本実施形態では、略四角形)の渦巻き状に巻かれた巻線コイル14を形成する(本発明の非接触ICカードの製造方法における、巻線コイルを形成する工程)。
【0036】
その後、下側のフィルム12Aと駆動部17とをそれぞれ図4の右方向にスライドし、各針部材13に巻線コイル14を保持したまま、該下側のフィルム12Aの巻線コイルが形成された部分を所定長さ分移動して、図4のBで示す位置に位置させる(本発明の非接触ICカードの製造方法における、巻線コイルが形成された部分を所定長さ分移動する工程)。
【0037】
次に、下側のフィルム12Aの巻線コイル14が形成された部分の移動位置(図4のBで示す位置)で、該下側のフィルム12Aに上側のフィルム12Bを熱融着により貼り付けて、該巻線コイル14と回路基板とを前記2枚のフィルム12A,12B間に封止する(本発明の非接触ICカードの製造方法における、巻線コイルと回路基板とを2枚のフィルム間に封止する工程)。
【0038】
このようにして、巻線コイル14と回路基板の封止が終了した後、各針部材13を、駆動部17の図4の下側の矢印に示すような下方向のスライド駆動により下動させて、下側のフィルム12Aから退去させる(本発明の非接触ICカードの製造方法における、針部材を退去させる工程)。
【0039】
その後、各針部材13を、駆動部17の図4の左方向のスライド駆動により同図のBで示す位置からAで示す元位置、すなわち、各針部材13を下側のフィルム12Aに差し込む位置まで移動復帰させる(本発明の非接触ICカードの製造方法における、針部材を移動復帰させる工程)。
【0040】
上記のような各針部材13の移動復帰と共に、上側のフィルム12Bが図4の右方向にスライドされて、次の、巻線コイル形成並びに巻線コイルと回路基板の封止に備える。
【0041】
かかる工程が繰り返され、巻線コイル形成され、この巻線コイルと回路基板が封止されたものが順次図4の右方向に送られる。
【0054】
かかる構成の非接触ICカード及びその製造方法によれば、銅線14A(金属細線)の巻回自体が容易になると共に、巻回された巻線コイル14の形状を保持するのも容易となり、巻線コイル14を正規の形状、例えば、方形状等に正確に形成するのが容易になり、複雑な多角形状の巻線コイルの形成も容易であり、ひいては、非接触ICカードの製造性を向上することができる。
【0055】
なお、巻線コイル14は、複雑な多角形若しくはこれに類する形に渦巻き状に巻かれた形状でも容易に形成でき、本実施形態のように略四角形である必要はない。
【0057】
そして、かかる非接触ICカード及びその製造方法の特出されるべき利点は、次のようである。
【0058】
すなわち、下側のフィルム12Aに差し込まれて、銅線14Aを位置決めするべく該銅線14Aが順次掛けられる針部材13であって、巻線コイル14と回路基板とを2枚のフィルム12A,12B間に封止した後に、下側のフィルム12Aから退去される構成である多数の針部材13は、下側のフィルム12Aの各角部において、夫々内側が開いた略V字形をなすように夫々所定の間隔で並び、かつ、隣り合う略V字形の対応する各針部材13同士に掛けられる銅線14A同士が、互いに所定の間隔を有するように各略V字形の配置を定めてあるため、巻線コイルの各巻回部における銅線14A(金属細線)の間隔が製品毎に一定となり、変動する虞がなく、この結果、製品毎の巻線コイルの共振周波数の変動が抑えられ、製品を安定化することができる
【0059】
ここで、等価回路と数式にて、かかる本非接触ICカードの特出されるべき利点について説明する。
【0060】
図3は、非接触ICカードの等価回路である。
【0061】
この図において、アンテナコイル(ANT)において、CPCは、コイル線間容量(pF)、LPCは、コイルインダクタンス(μH)、RPCは、2π*fres*LPC/Qcoilである。この式におけるfresは、13.56MHzである 一方、回路基板10(IC)において、Cchipは、23.5−1.2pF〜23.5+1.2pF、Rchipは、約24kΩである。
【0062】
なお、非接触ICカードにおいて、Cp は、2.5pFである。
【0063】
概略条件を示すと、
【0064】
(1)線材はCu、線径は40、60、80、100μmである。
【0065】
(2)絶縁層(ポリウレタン)+融着層(ポリエステル系)の厚みは、5+3μm、10+5μmである。
【0066】
(3)巻数は、4T、5Tである。
【0067】
(参考 直径0.1の場合のDCRは、4T=2Ω、5T=2.5Ωである。)
【外1】

Figure 0004607294
【0068】
なお、上記の式において、εo は真空の誘電率、εは比誘電率、μo は真空の透磁率、μは比透磁率である。
【0069】
また、導体抵抗(CuR)は、
【0070】
直径0.04=14.140〜15.670/m
【0071】
直径0.06=6.287〜6.966/m
【0072】
直径0.08=3.500〜3.788/m
【0073】
直径0.10=2.240〜2.381/m
【0074】
かかる式でも、判ることは、Cpc、すなわち、アンテナコイルの線間容量(磁気コイルの各巻回部の間隔)の変動量が、fMO、すなわち、アンテナコイルの共振周波数の変動量に影響することであり、Cpcが一定の方がfMOを安定化する点で良好である。
【0075】
なお、非接触ICカードを製造するに当たっては、次のようにしても良い。
【0076】
すなわち、図5は、大きい1枚のフィルムから多数枚のフィルムを打ち抜いたり、切り抜いたり等して得て、多数枚(30枚)の各フィルムから夫々巻線コイルと回路基板とを含んで構成された非接触ICカードを製造したものである。
【0077】
なお、この図5において、各横列におけるSは巻線コイルの巻始、Eはその巻終である。
【0078】
また、図6に示すように、2枚のフィルム12A、12Bを、両方共アンテナコイル11部分を覆う粘着剤を塗布したテープ18で構成するか、若しくは2枚のフィルム12A、12Bの内、何れか一方をアンテナコイル11部分を覆う粘着剤を塗布したテープ18で構成するようにしても良い。
【0079】
かかる構成によれば、従来は、ICチップモジュール取り付け用の孔をフィルムに形成していたが、孔あけの必要なくなり工数と材料費の削減が図られる。
【0080】
また、粘着剤を塗布したテープ18により、一方のフィルムに他方のフィルムを熱融着により貼り付ける工程が簡略され工数低減が図られる。
【発明の効果】
以上説明したように、請求項1に係る発明の非接触ICカード及び請求項5に係る発明の非接触ICカードの製造方法によれば、一方のフィルムに差し込まれて、金属細線を位置決めするべく該金属細線が順次掛けられる針部材であって、巻線コイルと回路基板とを2枚のフィルム間に封止した後に、前記一方のフィルムから退去される構成である多数の針部材は、一方のフィルムの各角部において、夫々内側が開いた略V字形をなすように夫々所定の間隔で並び、かつ、隣り合う略V字形の対応する各針部材同士に掛けられる金属細線同士が、互いに所定の間隔を有するように各略V字形の配置を定めてあるため、巻線コイルの各巻回部における金属細線の間隔が製品毎に一定となり、変動する虞がなく、この結果、製品毎の巻線コイルの共振周波数の変動が抑えられ、製品を安定化することができ、しかも、巻線コイルが正確に形成でき、ひいては、非接触ICカードの製造性を向上することができる。
【0081】
請求項2に係る発明によれば、巻線コイルを、略四角形に簡単、かつ、正確に形成できる。
【0082】
請求項3及び4に係る発明によれば、2枚のフィルム又はその何れか一方を、アンテナコイル部分を覆う粘着剤を塗布したテープで構成したので、従来は、ICチップモジュール取り付け用の孔をフィルムに形成していた、孔あけが必要なくなり工数と材料費の削減が図られる。
【0083】
また、粘着剤を塗布したテープにより、従来の一方のフィルムに他方のフィルムを熱融着により貼り付ける工程が簡略され工数低減が図られる。
【0087】
請求項6に係る発明によれば、大きいフィルムから簡単な工程で多数の非接触ICカードを製造することができる。
【図面の簡単な説明】
【図1】 本発明に係る非接触ICカードの一実施形態を示す平面図
【図2】 同上の実施形態の針部材の配置例を示す平面図
【図3】 同上の実施形態の非接触ICカードの等価回路図
【図4】 同上の実施形態の非接触ICカードの製造方法を実施する装置の概略図
【図5】 同上の実施形態の非接触ICカードの製造方法の他の例を示す平面図
【図6】 同上の実施形態の非接触ICカードの製造方法の他の一実施形態を示す平面図
【図7】 従来の非接触ICカードの斜視図 [0001]
BACKGROUND OF THE INVENTION
The present invention relates to a non-contact IC card used for various cards, product tags, labels, and the like and a method for manufacturing the same, and more particularly to a metal fine wire positioning structure for forming an antenna coil and a method therefor.
[0002]
[Prior art]
As this type of non-contact IC card, as shown in FIG. 7 , a circuit board 1 on which electronic components are mounted, and connected to the circuit board 1 to transmit and receive information via a predetermined medium such as electromagnetic coupling and radio waves An antenna coil 2 that is sealed with a coating resin 3 is known (see Japanese Patent Application Laid-Open Nos. 9-1969 and 9-1970).
[0003]
In the case of using a winding coil in which a thin metal wire such as a copper wire having a circular or rectangular cross section is used as the antenna coil 2 among the components of such a non-contact IC card, conventionally, A wire coil is formed on one of the two coated resin films, and the wound coil and the circuit board are attached to the one coated resin film by attaching the other coated resin film to the wound coil. The circuit board is sealed with a coating resin.
[0004]
However, such a non-contact IC card has a structure in which a winding coil is formed by winding a thin metal wire such as a copper wire in a spiral shape on a coated resin film. It is difficult and it is difficult to maintain the shape of the wound winding coil, and it is difficult to accurately form the winding coil into a regular shape such as a square shape. It was extremely difficult to form a wound coil.
[0005]
In order to solve such a problem, the coating resin is composed of two films made of heat-sealing resin that are heat-sealed to each other, while the antenna coil is positioned on one film by positioning the fine metal wires with positioning means. There has been proposed a non-contact IC card comprising a winding coil wound in a predetermined shape and sealed between the winding coil, the circuit board, and two films (Japanese Patent Laid-Open No. 11). -115360).
[0006]
[Problems to be solved by the invention]
However, in a conventional non-contact IC card, a plurality of needle members as positioning means are inserted into one of two films, and a thin metal wire is sequentially hung on each needle member on one film to form a predetermined spiral shape. Winding needle coil is formed, and the needle member is merely located at the direction changing portion of the winding coil, i.e., at the corner portion, so in each winding portion of the winding coil The interval between the fine metal wires is not constant depending on the product, and may vary.
[0007]
As will be described later, the fluctuation of the distance between the thin metal wires in each winding portion of the winding coil causes the line capacitance Cpc (pF) of the winding coil to fluctuate and affects the fluctuation amount of the resonance frequency fMO as a module.
[0008]
For example, when the fine metal wires are in close contact with each other, the line capacity of the winding coil increases, and this line capacity varies greatly depending on the insulation film thickness, wire diameter, and winding state. The width of the resonance frequency is widened.
[0009]
The present invention has been made in order to solve the above-described problems. In particular, the antenna coil is formed from a winding coil in which a thin metal wire is positioned by a needle member in one film and wound in a predetermined shape. It is an object of the present invention to provide a non-contact IC card and a method for manufacturing the same, in which the resonance frequency as a module is stabilized by the arrangement structure of the needle members.
[0010]
[Means for Solving the Problems]
For this reason, the non-contact IC card of the invention according to claim 1 is configured such that a circuit board on which electronic components are mounted and an antenna coil connected to the circuit board and transmitting and receiving information via a predetermined medium are mutually heated. a configuration which is adapted to seal the two films as the coating resin composed of fused by heat fusion resin, the antenna coil, the polygon is positioned by the needle member metal wires in one film Alternatively, in a non-contact IC card constituted by a winding coil spirally wound in a similar form, and the winding coil and the circuit board are sealed between the two films, the needle member is: one inserted into the film thin metal wires are sequentially multiplied et al in and after sealing and winding coils and the circuit board between the two films, in the configuration of the be retired from one film Write, needle member, at each corner of said one film, each parallel a number predetermined intervals such that the inner forms the substantially V-shaped open beauty and substantially adjacent V-shaped each corresponding needle thin metal wires each other applied to each other, characterized in that it is a configuration that defines one another arrangement of the generally V-shaped so as to have a predetermined interval.
[0011]
The invention according to claim 2 is characterized in that the winding coil is substantially rectangular.
[0012]
The invention according to claim 3 is characterized in that the two films are made of a tape coated with an adhesive covering the antenna coil portion.
[0013]
The invention according to claim 4 is characterized in that either one of the two films is composed of a tape coated with an adhesive covering the antenna coil portion.
[0015]
Method of manufacturing a non-contact IC card of the invention according to claim 5, a circuit board having electronic components mounted, is connected to the circuit board, and an antenna coil for transmitting and receiving information through a predetermined medium, the heat from each other A non-contact IC card manufacturing method in which sealing is performed by two films as a coating resin composed of a heat-sealing resin to be fused , and a drive unit that is reciprocally driven to slide in the vertical and horizontal directions, respectively. A plurality of needle members that are arranged and attached in a predetermined shape on the upper surface of each of the two members and extend upward, respectively, the lower side of the upper and lower two films disposed above the driving unit. in the positions corresponding to corner portions of the film, each parallel with each predetermined interval so as inside a substantially V-shaped open beauty, and the line between connecting corresponding ones between the substantially adjacent V-shaped, Have a certain distance from each other To a large number of needle member which defines the arrangement of Kakuryaku V-Te, said moved upward by the vertical slide drive unit, and the step of inserting the film of the lower, the lower side of the film on the odor, metal forming sequentially over the polygon or the winding coil wound spirally in a shape similar thereto by Rukoto a fine line to each needle member protruding from the film of the lower side, the drive and the lower side of the film And moving the portion of the lower film where the winding coil is formed by a predetermined length while holding the winding coil on each needle member, and the lower side at a mobile position of the part winding coil is formed of a film, the upper film to the film of the lower side adhered by thermal fusion, between the said circuit board and said winding coil the two films a step of sealing the said winding co After the sealing of the cable and the circuit board is completed, each needle member is moved down by sliding in the longitudinal direction of the drive unit, and is retracted from the lower film, and each needle member is moved to the drive unit. And moving back to the position where it is inserted into the lower film by sliding in the horizontal direction .
[0017]
The invention according to claim 6 obtains a large number of films from a single large film, and manufactures a non-contact IC card including a winding coil and a circuit board from each of the large number of films. It is characterized by.
[0018]
Next, the operation of the invention will be described. According to the non-contact IC card of the invention according to claim 1 and the non-contact IC card manufacturing method of the invention according to claim 5, the metal is inserted into one of the films. A needle member on which the thin metal wires are sequentially hung to position the thin wire, and the winding coil and the circuit board are sealed between the two films, and then are removed from the one film. Metals that are arranged at predetermined intervals so as to form a substantially V shape with the inner side opened at each corner of one film, and that are hung between adjacent needle members that are substantially V-shaped adjacent to each other. thin lines with each other, it is so arranged define one another arrangement of the generally V-shaped so as to have a predetermined interval, the interval of metal thin wires in each winding of the winding coil is constant for each product, there is no possibility to vary, Result of variations in the resonant frequency of winding coils for each product is suppressed et al is the product is stabilized, moreover, the winding coil can be accurately formed, it is possible to turn, improving the productivity of the non-contact IC card .
[0019]
In the invention according to claim 2, the winding coil is formed in a substantially square shape easily and accurately.
[0020]
In the inventions according to claims 3 and 4, since the two films or any one of them is composed of a tape coated with an adhesive covering the antenna coil portion, conventionally, a hole for mounting an IC chip module is a film. However, it is not necessary to drill holes, and man-hours and material costs can be reduced.
[0023]
In the invention according to claim 6 , a large number of non-contact IC cards are manufactured from a large film by a simple process.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0025]
FIG. 1 shows an embodiment of an antenna coil in a non-contact IC card according to the present invention.
[0026]
This non-contact IC card includes a circuit board (not shown) on which electronic components are mounted and an antenna coil 11 connected to the circuit board and transmitting and receiving information via a predetermined medium such as electromagnetic coupling and radio waves. 12 is configured to be sealed.
[0027]
Here, the coating resin 12 is composed of two films made of a heat-sealing resin, for example, polyester, which are heat-sealed to each other.
[0028]
In one film, the antenna coil 11 is formed by positioning a copper wire 14A as a thin metal wire with a large number of needle members 13 into a polygonal shape or a similar shape, in this embodiment, a substantially rectangular spiral (parallel). The winding coil 14 and the circuit board are sealed between two films.
[0029]
In FIG. 1, S is the winding start of the winding coil 14, and E is the winding end.
[0030]
Next, FIG. 4 shows an example of a manufacturing apparatus that executes the method of manufacturing a non-contact IC card according to the present invention. That is, the lower film 12A of the two lower and upper films 12A and 12B is wound around the winding portion 15, and is pulled out from the winding portion 15 in the lateral direction indicated by the arrow in FIG. The film slides and is slid rightward in the figure by a film slide means (not shown). The upper film 12B is wound around a winding portion 16 disposed at a position offset from the winding portion 15 by a predetermined distance in the lateral direction above the winding portion 15. 4 is pulled out in the lateral direction indicated by the arrow in FIG. 4 which is the same as the direction in which the lower film 12A extends from the winding unit 16, and is slid rightward in the drawing by a film slide means (not shown).
[0031]
At the lower position in the vicinity of the winding portion 15 of the lower film 12A, there is disposed a driving portion 17 that reciprocally slides in the vertical direction and the horizontal direction as indicated by arrows in FIG. A large number of needle members 13 extending in the upward direction are attached to the upper surface of the drive unit 17. In this case, as shown in FIGS. 1 and 2, the multiple needle members 13 are substantially V-shaped with their inner sides opened at positions corresponding to the corners of the lower film 12A (see FIG. 4). As described above, the substantially V-shaped arrangement is determined such that the copper wires 14A that are arranged at predetermined intervals and are hung between the corresponding substantially V-shaped adjacent needle members 13 have predetermined intervals. Yes.
[0032]
For example, the substantially V-shaped angle θ is 70 degrees.
[0034]
Based on the operation of the manufacturing apparatus having such a configuration, a method for manufacturing a non-contact IC card according to the present invention will be described. First, each needle member 13 is moved upward by an upward slide drive as indicated by an arrow on the upper side of the drive unit 17 at the original position indicated by A in FIG. 4 and inserted into the lower film 12A. (Step of inserting a needle member in the method of manufacturing a non-contact IC card of the present invention).
[0035]
Next, on the lower film 12A, a copper wire 14A is sequentially hung on each needle member 13 protruding from the lower film 12A to be wound into a spiral shape of a predetermined shape (in this embodiment, a substantially rectangular shape). The winding coil 14 is formed (the step of forming the winding coil in the method of manufacturing a non-contact IC card of the present invention).
[0036]
Thereafter, the lower film 12A and the drive unit 17 are each slid rightward in FIG. 4, and the winding coil of the lower film 12A is formed while holding the winding coil 14 on each needle member 13. 4 is moved to a position indicated by B in FIG. 4 (in the method for manufacturing a non-contact IC card according to the present invention, the step in which the portion where the winding coil is formed is moved by a predetermined length. ).
[0037]
Next, the upper film 12B is bonded to the lower film 12A by heat-sealing at the movement position (position indicated by B in FIG. 4) of the portion of the lower film 12A where the winding coil 14 is formed. Then, the winding coil 14 and the circuit board are sealed between the two films 12A and 12B (the winding coil and the circuit board in the non-contact IC card manufacturing method of the present invention are two films). Sealing in between).
[0038]
After the sealing of the winding coil 14 and the circuit board is completed in this way, each needle member 13 is moved downward by the downward sliding drive as shown by the arrow on the lower side of FIG. Then, the film is moved away from the lower film 12A (the step of moving the needle member in the method of manufacturing a non-contact IC card of the present invention).
[0039]
Thereafter, each needle member 13 is moved to the original position indicated by A from the position indicated by B in FIG. 4 by the leftward sliding drive of the drive unit 17 in FIG. 4, that is, the position where each needle member 13 is inserted into the lower film 12A. (The step of moving and returning the needle member in the non-contact IC card manufacturing method of the present invention).
[0040]
As the needle members 13 move and return as described above, the upper film 12B is slid in the right direction in FIG. 4 to prepare for the next winding coil formation and winding coil and circuit board sealing.
[0041]
This process is repeated to form a winding coil, and the winding coil and the circuit board sealed are sequentially sent to the right in FIG.
[0054]
According to the non-contact IC card having such a configuration and the manufacturing method thereof, the copper wire 14A (metal thin wire) can be easily wound and the shape of the wound winding coil 14 can be easily maintained. regular shape winding coil 14, for example, makes it easier to accurately formed in a square shape, formation of the winding coils of complex polygonal shapes Ri ease der, therefore, the productivity of the non-contact IC card Can be improved.
[0055]
Note that the winding coil 14 can be easily formed in a complicated polygonal shape or a spirally wound shape, and does not have to be substantially rectangular as in the present embodiment.
[0057]
The advantages of the non-contact IC card and the method for manufacturing the same are as follows.
[0058]
That is, the needle member 13 is inserted into the lower film 12A, and the copper wire 14A is sequentially hooked to position the copper wire 14A, and the winding coil 14 and the circuit board are connected to the two films 12A and 12B. A large number of needle members 13 that are configured to be retracted from the lower film 12A after being sealed in between are formed in a substantially V shape in which each inner corner is open at each corner of the lower film 12A. parallel beauty at a predetermined interval, and, because the corresponding copper 14A mutually applied to each needle member 13 to each other substantially V-shaped adjacent, are set to each other arrangement of the generally V-shaped so as to have a predetermined gap , spacing of copper wire 14A (thin metal wire) in each winding of the winding coil is constant for each product, a possibility to change rather name a result, variations in the resonance frequency of winding coils for each product can be suppressed, Stabilize the product It is possible.
[0059]
Here, the advantage to be brought out of this non-contact IC card will be described with an equivalent circuit and a mathematical expression.
[0060]
FIG. 3 is an equivalent circuit of a non-contact IC card.
[0061]
In this figure, the antenna coil (ANT), C PC is the coil wire capacitance (pF), L PC is a coil inductance (μH), R PC is 2π * fres * L PC / Qcoil . In the equation, fres is 13.56 MHz. On the other hand, in the circuit board 10 (IC), Cchip is 23.5-1.2 pF to 23.5 + 1.2 pF, and Rchip is about 24 kΩ.
[0062]
In the non-contact IC card, Cp is 2.5 pF.
[0063]
The general conditions are as follows:
[0064]
(1) The wire is Cu, and the wire diameter is 40, 60, 80, 100 μm.
[0065]
(2) The thickness of the insulating layer (polyurethane) + fusion layer (polyester) is 5 + 3 μm, 10 + 5 μm.
[0066]
(3) The number of turns is 4T, 5T.
[0067]
(Reference DCR in case of diameter 0.1 is 4T = 2Ω, 5T = 2.5Ω)
[Outside 1]
Figure 0004607294
[0068]
In the above equation, εo is a vacuum dielectric constant, ε is a relative dielectric constant, μo is a vacuum magnetic permeability, and μ is a relative magnetic permeability.
[0069]
Also, the conductor resistance (CuR) is
[0070]
Diameter 0.04 = 14.140-15.670 / m
[0071]
Diameter 0.06 = 6.287-6.966 / m
[0072]
Diameter 0.08 = 3.500-3.788 / m
[0073]
Diameter 0.10 = 2.240-2.381 / m
[0074]
Even in this formula, it can be understood that the fluctuation amount of Cpc, that is, the line capacitance of the antenna coil (interval between the winding portions of the magnetic coil) influences f MO , that is, the fluctuation amount of the resonance frequency of the antenna coil. and is a good in that Cpc better constant stabilizes f MO.
[0075]
In manufacturing the non-contact IC card, the following may be performed.
[0076]
That is, FIG. 5 is obtained by punching or cutting a large number of films from one large film, and includes a winding coil and a circuit board from each of a large number (30 sheets) of films. Manufactured non-contact IC card.
[0077]
In FIG. 5, S in each row is the start of winding of the winding coil, and E is the end of winding.
[0078]
In addition, as shown in FIG. 6, the two films 12A and 12B are both composed of a tape 18 coated with an adhesive covering the antenna coil 11 portion, or of the two films 12A and 12B. One of them may be constituted by a tape 18 coated with an adhesive covering the antenna coil 11 portion.
[0079]
According to such a configuration, the holes for attaching the IC chip module are conventionally formed in the film. However, it is not necessary to make holes, and man-hours and material costs can be reduced.
[0080]
Moreover, the process of sticking the other film to one film by heat fusion is simplified by the tape 18 coated with the adhesive, and the number of steps can be reduced.
【The invention's effect】
As described above, according to the non-contact IC card of the invention according to claim 1 and the non-contact IC card manufacturing method of the invention according to claim 5, the thin metal wire is positioned by being inserted into one film. The needle member to which the fine metal wires are sequentially hung, and after the winding coil and the circuit board are sealed between two films, a large number of needle members are configured to be removed from the one film. of each corner of the film, parallel with each predetermined interval to form a substantially V-shaped respectively inside open beauty, and the corresponding fine metal wires with each other applied to the needle between a substantially V-shaped adjacent, because each other are set the arrangement of substantially V-shaped so as to have a predetermined interval, the interval of metal thin wires in each winding of the winding coil is constant for each product, there is no possibility to vary, as a result, each product Winding coil Variation in vibration frequency is suppressed, it is possible to stabilize the product, moreover, the winding coil can be accurately formed, it is possible to turn, improving the productivity of the non-contact IC card.
[0081]
According to the invention which concerns on Claim 2, a winding coil can be formed in a substantially square shape simply and correctly.
[0082]
According to the inventions according to claims 3 and 4, since the two films or any one of them is composed of a tape coated with an adhesive covering the antenna coil portion, conventionally, a hole for mounting an IC chip module has been provided. Holes that have been formed in the film are no longer needed, and man-hours and material costs can be reduced.
[0083]
Moreover, the process which affixes the other film to one conventional film by heat sealing | fusion with the tape which apply | coated the adhesive is simplified, and a man-hour reduction is achieved.
[0087]
According to the invention which concerns on Claim 6 , many non-contact IC cards can be manufactured with a simple process from a big film.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of a contactless IC card according to the present invention. FIG. 2 is a plan view showing an arrangement example of needle members according to the embodiment. FIG. 3 is a contactless IC according to the embodiment. FIG. 4 is a schematic diagram of an apparatus for carrying out the method for manufacturing a non-contact IC card according to the embodiment. FIG. 5 shows another example of the method for manufacturing a non-contact IC card according to the embodiment. FIG. 6 is a plan view showing another embodiment of the method for manufacturing a non-contact IC card according to the embodiment. FIG . 7 is a perspective view of a conventional non-contact IC card.

Claims (6)

電子部品が実装された回路基板と、該回路基板に接続され、所定の媒体を介して情報を送受信するアンテナコイルとを、互いに熱融着される熱融着樹脂からなる被覆樹脂としての2枚のフィルムにより封止するようにした構成であって、前記アンテナコイルを、一方のフィルムにおいて金属細線を針部材により位置決めして多角形若しくはこれに類する形に渦巻き状に巻いた巻線コイルから構成し、該巻線コイルと前記回路基板とを、前記2枚のフィルム間に封止した非接触ICカードにおいて、
前記針部材は、一方のフィルムに差し込まれて金属細線が順次掛けられ、かつ、巻線コイルと回路基板とを2枚のフィルム間に封止した後に、前記一方のフィルムから退去される構成である一方、該針部材は、前記一方のフィルムの各角部において、夫々内側が開いた略V字形をなすように多数所定の間隔で並び、かつ、隣り合う略V字形の対応する各針部材同士に掛けられる金属細線同士が、互いに所定の間隔を有するように各略V字形の配置を定めた構成であることを特徴とする非接触ICカード。
Two sheets of coating resin made of a heat-sealing resin that is heat-sealed to a circuit board on which electronic components are mounted and an antenna coil that is connected to the circuit board and transmits and receives information via a predetermined medium The antenna coil is composed of a coil wound in a spiral shape in a polygonal shape or the like by positioning a thin metal wire with a needle member in one film. In the non-contact IC card in which the winding coil and the circuit board are sealed between the two films,
The needle member is configured plugged into one of the film thin metal wires sequentially multiplied et been, and, after sealing the winding coil and the circuit board between the two films, said be retired from one film On the other hand, the needle members are arranged at a predetermined interval so as to form a substantially V shape with the inner sides open at each corner of the one film , and the corresponding substantially V-shaped corresponding needles adjacent to each other. A non-contact IC card having a configuration in which arrangement of each substantially V-shape is determined so that thin metal wires hung between members have a predetermined distance from each other.
前記巻線コイルは、略四角形であることを特徴とする請求項1記載の非接触ICカード。  The non-contact IC card according to claim 1, wherein the winding coil is substantially rectangular. 前記2枚のフィルムは、アンテナコイル部分を覆う粘着剤を塗布したテープで構成されることを特徴とする請求項1または2記載の非接触ICカード。  3. The non-contact IC card according to claim 1, wherein the two films are made of a tape coated with an adhesive that covers the antenna coil portion. 前記2枚のフィルムの内、何れか一方がアンテナコイル部分を覆う粘着剤を塗布したテープで構成されることを特徴とする請求項1または2記載の非接触ICカード。  3. The non-contact IC card according to claim 1, wherein one of the two films is made of a tape coated with an adhesive that covers the antenna coil portion. 電子部品が実装された回路基板と、該回路基板に接続され、所定の媒体を介して情報を送受信するアンテナコイルとを、互いに熱融着される熱融着樹脂からなる被覆樹脂としての2枚のフィルムにより封止するようにした非接触ICカードの製造方法であって、
縦方向及び横方向に夫々往復スライド駆動される駆動部の上面に所定形に配置されて取り付けられ、夫々上方向に伸びる多数の針部材であって、夫々前記駆動部の上方に配設された下側と上側の2枚のフィルムのうちの下側のフィルムの各角部に対応する位置において、夫々内側が開いた略V字形をなすように夫々所定の間隔で並び、かつ、隣り合う略V字形の対応するもの同士を結ぶ線同士が、互いに所定の間隔を有するように各略V字形の配置を定めた多数の針部材を、前記駆動部の縦方向のスライドにより上動させて、前記下側のフィルムに差し込む工程と、
前記下側のフィルム上において、金属細線を該下側のフィルムから突出する各針部材に順次掛けることにより多角形若しくはこれに類する形渦巻き状に巻かれた前記巻線コイルを形成する工程と、
前記下側のフィルムと駆動部とを夫々横方向にスライドし、前記各針部材に巻線コイルを保持したまま、該下側のフィルムの巻線コイルが形成された部分を所定長さ分移動する工程と、
前記下側のフィルムの巻線コイルが形成された部分の移動位置で、該下側のフィルムに上側のフィルムを熱融着により貼り付けて、該巻線コイルと前記回路基板とを前記2枚のフィルム間に封止する工程と、
前記巻線コイルと回路基板の封止が終了した後、前記各針部材を、駆動部の縦方向のスライドにより下動させて、前記下側のフィルムから退去させる工程と、
前記各針部材を、駆動部の横方向のスライドにより前記下側のフィルムに差し込む位置まで移動復帰させる工程と、
を含むことを特徴とする非接触ICカードの製造方法。
Two sheets of coating resin made of a heat-sealing resin that is heat-sealed to a circuit board on which electronic components are mounted and an antenna coil that is connected to the circuit board and transmits and receives information via a predetermined medium A non-contact IC card manufacturing method that is sealed with a film of
A plurality of needle members arranged in a predetermined shape and attached to the upper surface of a drive unit that is reciprocally driven to slide back and forth in the vertical direction and the horizontal direction, respectively, and extend upward. Each needle member is disposed above the drive unit. At the positions corresponding to the corners of the lower film of the two lower and upper films, each of them is arranged at a predetermined interval so as to form a substantially V shape with the inner sides opened , and adjacent to each other. A number of needle members, each of which has a substantially V-shaped arrangement so that the lines connecting the corresponding ones of the V-shapes have a predetermined distance from each other, are moved upward by sliding in the vertical direction of the drive unit, Inserting into the lower film ;
On the film of the lower, forming a successively subjected polygonal or the winding coil wound spirally in a shape similar thereto by Rukoto each needle member protruding metal wires from the film of the lower side When,
Slide the lower film and the drive part laterally, and move the part of the lower film where the winding coil is formed by a predetermined length while holding the winding coil on each needle member. And a process of
In moving position of the part winding coil is formed of the lower film, the upper film to the film of the lower side adhered by thermal fusion, two said and said circuit board with said winding coils a step of sealing between the film,
After the sealing of the winding coil and the circuit board is finished, each needle member is moved downward by sliding in the longitudinal direction of the drive unit, and retreated from the lower film,
Moving each needle member back to a position where it is inserted into the lower film by sliding in the lateral direction of the drive unit; and
A method for manufacturing a non-contact IC card, comprising:
大きい1枚のフィルムから多数枚のフィルムを得て、多数枚の各フィルムから夫々巻線コイルと回路基板とを含んで構成された非接触ICカードを製造することを特徴とする請求項5記載の非接触ICカードの製造方法。To obtain a large number of films from one film large, according to claim 5, characterized in that to produce the non-contact IC card that is configured to include a respective winding coils and the circuit board from the film of a large number of sheets Manufacturing method of non-contact IC card.
JP2000221560A 2000-07-21 2000-07-21 Non-contact IC card and manufacturing method thereof Expired - Fee Related JP4607294B2 (en)

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