JP2000293652A - Antenna circuit for ic card - Google Patents
Antenna circuit for ic cardInfo
- Publication number
- JP2000293652A JP2000293652A JP11134640A JP13464099A JP2000293652A JP 2000293652 A JP2000293652 A JP 2000293652A JP 11134640 A JP11134640 A JP 11134640A JP 13464099 A JP13464099 A JP 13464099A JP 2000293652 A JP2000293652 A JP 2000293652A
- Authority
- JP
- Japan
- Prior art keywords
- antenna circuit
- width
- antenna
- card
- fixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Details Of Aerials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、非接触ＩＣカードで使
用される電波信号を検知するアンテナ回路に関する。非
接触ＩＣカードは放射された電波を介して情報を交換す
るもので、カードの中に装着されるアンテナ回路は、そ
のＩＣカードの性能を左右する重要な要素である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna circuit for detecting a radio signal used in a non-contact IC card. A non-contact IC card exchanges information via radiated radio waves, and an antenna circuit mounted in the card is an important factor that affects the performance of the IC card.
【０００２】[0002]
【従来の技術】従来、アンテナ回路には、細い銅線を
巻いたもの、銅箔やアルミ箔等をエッチングにより形
成したもの、導電性塗料を所定の形状に印刷したもの
等があった。の銅線を巻いたものは、形状の薄化、均
一化に難点があり又巻取り工数の低減にも難点があっ
た。の銅箔、アルミニウム箔等をエッチングしたもの
は、薄化に難点があるのと同時にエッチング時の廃液処
理等に難点があった。の導電性塗料を印刷したもの
は、電気抵抗が高く又塗料の価格の面でも改善が必要と
言われていた。2. Description of the Related Art Heretofore, there have been antenna circuits in which a thin copper wire is wound, copper foil or aluminum foil is formed by etching, or a conductive paint is printed in a predetermined shape. The copper wire wound has a difficulty in thinning and uniforming the shape and a difficulty in reducing the number of winding steps. Those obtained by etching copper foil, aluminum foil, etc., had problems in thinning as well as in waste liquid treatment during etching. It has been said that those printed with the conductive paint have high electric resistance and need to be improved in terms of the price of the paint.
【０００３】[0003]
【発明が解決しようとする課題】ＩＣカードは大量に普
及する必要がありできるだけ厚さの薄いカードが要望さ
れているが、前記のアンテナではそれぞれ厚さの薄化が
課題となっていた。薄くて、生産性が高く、しかも電波
信号を検知する能力が高く、またＩＣを装着した場合の
ＩＣと配線との相互干渉が少なくＩＣの装着歩留りが高
いＩＣカード用アンテナを供給することを課題とする。The IC cards need to be widely spread and there is a demand for a card as thin as possible. However, in the above-mentioned antennas, it has been a problem to reduce the thickness of each antenna. It is an object to provide an IC card antenna which is thin, has high productivity, has a high ability to detect a radio signal, has low mutual interference between an IC and wiring when the IC is mounted, and has a high IC mounting yield. And
【０００４】[0004]
【課題を解決するための手段】前記の課題を解決する手
段として印刷転写方式を採用した。表面に所定の凹凸を
持つベースフィルムに導電性金属の真空蒸着膜を形成し
た後、アンテナ回路を形成する基材表面に接着剤の印刷
とその部分に真空蒸着膜を連続的に転写することによっ
てアンテナ回路を形成する手段と、そのアンテナ回路に
装着されるＩＣチップの周辺及びチップのバンプ間を通
過するアンテナ回路の線巾をアンテナ本体部の線巾に比
べて細くしかも一定の巾で形成する手段。As a means for solving the above-mentioned problems, a printing transfer system is employed. After forming a vacuum-deposited film of conductive metal on a base film with predetermined irregularities on the surface, printing the adhesive on the substrate surface forming the antenna circuit and continuously transferring the vacuum-deposited film to that part Means for forming an antenna circuit, and the line width of the antenna circuit passing around the IC chip mounted between the antenna circuit and the bumps of the chip is formed to be narrower and more constant than the line width of the antenna body. means.
【０００５】[0005]
【作用】印刷転写方式によって形成されるアンテナ回路
は、電気抵抗が低くしかも薄くできることが特徴である
が、ＩＣバンプ間を通るアンテナ線は限られた間隔の間
にアンテナのターン数に応じた本数の線が配置されなけ
ればならない。通常の場合アンテナ本体の線巾を徐々に
細くしてＩＣバンプ間で一定の細巾にすることが行われ
ている。（図１参考）本発明が採用した印刷転写方式の
場合、巾が徐々に細くなるパターンの形成は転写時の真
空蒸着膜の剥離の状態をコントロールし難く、巾が一定
の細い線のほうがより高精度に転写できることがわかっ
た。本発明の場合図１に示されるようなＩＣの周辺及び
バンプ間の配線よりも、図２に示される本発明の一定巾
の細い線のほうが精度よく形成できた。本発明の方法を
採ることによってＩＣカード内のアンテナの位置的バラ
ンスが採りやすく実使用状態での耐久性等にも効果があ
る。また、接着剤の印刷は、カード基板あるいは蒸着基
板それぞれにした場合いずれも効果が確認された。The feature of the antenna circuit formed by the print transfer method is that it has a low electric resistance and can be made thin. However, the number of antenna lines passing between IC bumps is limited to the number corresponding to the number of turns of the antenna. Lines must be placed. Normally, the line width of the antenna body is gradually reduced to a constant width between the IC bumps. (See FIG. 1) In the case of the printing transfer method adopted by the present invention, it is difficult to control the peeling state of the vacuum deposited film at the time of transfer in the formation of a pattern having a gradually narrowing width. It was found that transfer was possible with high precision. In the case of the present invention, the thin line of a certain width of the present invention shown in FIG. 2 could be formed more accurately than the wiring around the IC and between the bumps as shown in FIG. By employing the method of the present invention, it is easy to balance the position of the antenna in the IC card, and it is effective for durability in actual use. The effect of printing the adhesive on the card substrate or the vapor deposition substrate was confirmed.
【０００６】第１例 厚さ５０μｍのポリエチレンテレフタレートフィルムの
表面に厚さ０．５μｍの銅の蒸着膜を用い印刷転写法に
よってアンテナ回路を形成した。アンテナ本体の線巾は
１ｍｍでターン数は４ターン、ＩＣ近辺ならびにバンプ
間の線巾は０．２ｍｍでバンプ間を３本の配線をとうし
た（図２参考）このアンテナ回路にＩＣを装着後測定し
たところ、１３．５６ＭＨｚの周波数において約１００
ｍｍの通信距離を得た。First Example An antenna circuit was formed on a surface of a 50 μm thick polyethylene terephthalate film by a print transfer method using a 0.5 μm thick copper vapor deposition film. The line width of the antenna body is 1 mm, the number of turns is 4 turns, the line width around the IC and between the bumps is 0.2 mm, and three wires are connected between the bumps (see FIG. 2). After mounting the IC on this antenna circuit As a result of measurement, at a frequency of 13.56 MHz, about 100
mm was obtained.
【０００７】第２例 厚さ１００μｍのポリエチレンテレフタレートフィルム
に印刷転写法によってアンテナ回路を形成した。アンテ
ナ本体の線巾は１ｍｍ、ＩＣ部の線巾は０．１ｍｍと
０．２ｍｍとを作った。アンテナ全抵抗値のうちＩＣ部
の抵抗値は０．１ｍｍの場合１９％、０．２ｍｍの場合
１５％を占めていた。アンテナ全抵抗値は所定の通信距
離を得るのに充分であった。またＩＣ部の線巾は０．３
ｍｍまで効果が認められた。Second Example An antenna circuit was formed on a 100 μm-thick polyethylene terephthalate film by a print transfer method. The antenna body had a line width of 1 mm, and the IC section had a line width of 0.1 mm and 0.2 mm. Of the total resistance value of the antenna, the resistance value of the IC part occupies 19% in the case of 0.1 mm and 15% in the case of 0.2 mm. The total antenna resistance was sufficient to achieve the required communication distance. The line width of the IC part is 0.3
The effect was recognized up to mm.
【０００８】[0008]
【発明の効果】導電性金属の真空蒸着膜を印刷転写法に
よってカード基材に転写する非接触ＩＣカード用のアン
テナ回路で、ＩＣ周辺とバンプ間の配線を一定巾の細線
で配線することによって、アンテナ回路の歩留りが向上
ししかもＩＣ装着歩留りも向上した。生産性の高い印刷
転写法によって得られたアンテナ用コイルは、特に非接
触ＩＣカードの性能向上とコストダウンに貢献できるも
のである。また、本発明の印刷転写アンテナ回路は厚さ
が接着剤の厚さを含めて２μｍ以下であり、薄化の要望
の強いＩＣカード用アンテナ回路には最適と考えられ
る。According to the present invention, an antenna circuit for a non-contact IC card for transferring a vacuum deposited film of a conductive metal to a card substrate by a print transfer method. As a result, the yield of the antenna circuit was improved, and the yield of mounting the IC was also improved. The antenna coil obtained by the print transfer method with high productivity can contribute to improvement of performance and cost reduction of a non-contact IC card. Further, the thickness of the printed transfer antenna circuit of the present invention is 2 μm or less including the thickness of the adhesive, and is considered to be most suitable for an antenna circuit for an IC card for which a demand for thinning is strong.
【図１】従来のアンテナ回路のＩＣ周辺パターンの拡大
図FIG. 1 is an enlarged view of an IC peripheral pattern of a conventional antenna circuit.
【図２】本発明の印刷転写法によるアンテナ回路のＩＣ
周辺パターン拡大図FIG. 2 is an IC of an antenna circuit formed by the print transfer method of the present invention.
Enlarged view of peripheral pattern
【図３】本発明のアンテナ回路全体図FIG. 3 is an overall view of an antenna circuit according to the present invention.
１はアンテナ本体部の配線 ２はＩＣ接続バンプ ３はＩＣ周辺配線部 ４はＩＣ位置決めマーカー 1 is the wiring of the antenna body 2 is the IC connection bump 3 is the IC peripheral wiring 4 is the IC positioning marker
Claims (1)
材に転写してなる非接触ＩＣカード用アンテナ回路にお
いて、ＩＣ装着部を通るアンテナ線の線巾を０．３ｍｍ
以下の一定した巾の線で配線されたことを特徴としたＩ
Ｃカード用アンテナ回路。In a non-contact IC card antenna circuit in which a conductive metal film formed by vacuum deposition is transferred to a card substrate, the line width of an antenna line passing through an IC mounting portion is 0.3 mm.
I characterized by being wired with the following fixed width lines
Antenna circuit for C card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11134640A JP2000293652A (en) | 1999-04-06 | 1999-04-06 | Antenna circuit for ic card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11134640A JP2000293652A (en) | 1999-04-06 | 1999-04-06 | Antenna circuit for ic card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000293652A true JP2000293652A (en) | 2000-10-20 |
Family
ID=15133101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11134640A Pending JP2000293652A (en) | 1999-04-06 | 1999-04-06 | Antenna circuit for ic card |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000293652A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006528803A (en) * | 2003-08-01 | 2006-12-21 | エム・アー・エヌ・ローラント・ドルックマシーネン・アクチエンゲゼルシャフト | Method for manufacturing an RFID label |
| JP2007151068A (en) * | 2005-10-27 | 2007-06-14 | Sumitomo Metal Mining Co Ltd | Film antenna wiring base material, its manufacturing method, film antenna using the same and film antenna for automobile |
| JP2007194778A (en) * | 2006-01-18 | 2007-08-02 | Sumitomo Metal Mining Co Ltd | Film-shape antenna wiring base, manufacturing method therefor, and film shape antenna using film-shape antenna wiring base |
-
1999
- 1999-04-06 JP JP11134640A patent/JP2000293652A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006528803A (en) * | 2003-08-01 | 2006-12-21 | エム・アー・エヌ・ローラント・ドルックマシーネン・アクチエンゲゼルシャフト | Method for manufacturing an RFID label |
| JP2007151068A (en) * | 2005-10-27 | 2007-06-14 | Sumitomo Metal Mining Co Ltd | Film antenna wiring base material, its manufacturing method, film antenna using the same and film antenna for automobile |
| JP2007194778A (en) * | 2006-01-18 | 2007-08-02 | Sumitomo Metal Mining Co Ltd | Film-shape antenna wiring base, manufacturing method therefor, and film shape antenna using film-shape antenna wiring base |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20050307 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20070515 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20071023 |