JPH06438B2 - IC card - Google Patents
IC cardInfo
- Publication number
- JPH06438B2 JPH06438B2 JP62259019A JP25901987A JPH06438B2 JP H06438 B2 JPH06438 B2 JP H06438B2 JP 62259019 A JP62259019 A JP 62259019A JP 25901987 A JP25901987 A JP 25901987A JP H06438 B2 JPH06438 B2 JP H06438B2
- Authority
- JP
- Japan
- Prior art keywords
- card
- circuit board
- printed circuit
- conductive film
- resistor
- 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.)
- Expired - Fee Related
Links
- 239000002184 metal Substances 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 230000005611 electricity Effects 0.000 description 9
- 230000003068 static effect Effects 0.000 description 9
- 230000015556 catabolic process Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
Landscapes
- Credit Cards Or The Like (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はＩＣカードに係り、特に静電気に強いＩＣカー
ドに関する。The present invention relates to an IC card, and more particularly to an IC card resistant to static electricity.
従来のＩＣカードの一例を、第２図(a)，第２図(b)に示
す。第２図(a)は、従来のＩＣカードの外形を示す斜視
図である。同図において、ＩＣカードの幅と長さは、そ
れぞれ５４mm，８６mmのクレジツトカードと同等の寸法
とする。ＩＣカードの厚さは、いろいろとあるが、この
例ではメス型コネクタを短辺方向に配置し、金属のケー
スを用いる為、３mmと比較的厚い寸法となつている。An example of a conventional IC card is shown in FIGS. 2 (a) and 2 (b). FIG. 2 (a) is a perspective view showing the outer shape of a conventional IC card. In the figure, the width and length of the IC card are the same as those of the credit card of 54 mm and 86 mm, respectively. The IC card has various thicknesses, but in this example, the female connector is arranged in the short side direction and a metal case is used, so that the IC card has a relatively thick dimension of 3 mm.
第２図(b)は、このＩＣカードの内部構成を分解して示
す斜視図である。同図において、金属ケース（例えばス
テンレス製）１１，絶縁性シート（例えば高分子樹脂
製）１２，複数のＩＣ１７が搭載されたプリント基板１
５，この基板１５に接続するメス型コネクタ１６が示さ
れている。同図に示される様に、メス型コネクタ１６
は、プリント基板１５に半田付けされている。FIG. 2B is an exploded perspective view showing the internal structure of the IC card. In the figure, a printed circuit board 1 on which a metal case (for example, made of stainless steel) 11, an insulating sheet (for example, made of polymer resin) 12, and a plurality of ICs 17 are mounted
5, a female connector 16 connected to this substrate 15 is shown. As shown in the figure, the female connector 16
Are soldered to the printed circuit board 15.
この種のＩＣカードは、ＯＡ機器等とデータの授受を行
なうことが可能であるが、通常はデータを保持した状態
で、保管されるが、或るいは使用者により持ち歩かれ
る。従つて、この種のＩＣカードは種々の温度・湿度条
件下にさらされることがわかる。特に湿度の低い環境下
に於ては、静電気によるＩＣカード内のデータ破壊、或
るいはＩＣカード内の搭載ＩＣ自体の破壊と言う問題が
発生する。This type of IC card is capable of exchanging data with an OA device or the like, but is usually stored in a state in which the data is retained, but it is also carried by the user. Therefore, it can be seen that this type of IC card is exposed to various temperature and humidity conditions. Especially in an environment with low humidity, there arises a problem that static electricity destroys data in the IC card or destroys the mounted IC itself in the IC card.
ところで、従来例のＩＣカードに於て、金属ケース１１
に静電気が徐々に帯電されると、やがて金属ケース１１
とプリント基板１５内の金属配線部分との間に放電が起
こる。かかる金属配線部分は、カード内のＩＣへの信号
配線又は電源，ＧＮＤ配線である為、この様な放電の結
果、ＩＣ自体の破壊、又は放電の起きた配線上の信号レ
ベルの変化に伴なうＩＣ内のデータ破壊が発生する。By the way, in the conventional IC card, the metal case 11
When the static electricity is gradually charged on the metal case 11
And a metal wiring portion in the printed circuit board 15 is discharged. The metal wiring portion is a signal wiring to the IC in the card, a power source, or a GND wiring. Therefore, as a result of such discharge, the IC itself is destroyed, or the signal level on the wiring where the discharge occurs is changed. Data in the IC will be destroyed.
本発明の目的は、前記問題点が解決され、放電現象を防
止し、集積回路素子が破壊せず、データのクリア事故等
が発生しないようにしたＩＣカードを提供することにあ
る。An object of the present invention is to solve the above problems, and to provide an IC card in which a discharge phenomenon is prevented, an integrated circuit element is not destroyed, and a data clear accident or the like does not occur.
本発明の構成は、１個又は複数のＩＣを実装したプリン
ト基板を、金属ケース内に収納したＩＣカードに於て、
前記プリント基板と金属ケースとの間に、絶縁性フィル
ム，導電性フィルム，絶縁性フィルムをこの順番で重ね
た三重フィルム構造を設け、導電性フィルムとプリント
基板上の専用電極とを電気的に接続し、専用電極とプリ
ント基板上の電気回路に於ける電源配線又はＧＮＤ配線
との間の１ＫΩ以上の抵抗器を介して電気的に接続した
ことを特徴とする。The configuration of the present invention is an IC card in which a printed board on which one or a plurality of ICs are mounted is housed in a metal case.
A triple film structure in which an insulating film, a conductive film, and an insulating film are stacked in this order is provided between the printed circuit board and the metal case, and the conductive film and the dedicated electrode on the printed circuit board are electrically connected. However, it is characterized in that the dedicated electrode and the power supply wiring or the GND wiring in the electric circuit on the printed circuit board are electrically connected via a resistor of 1 KΩ or more.
次に本発明について図面を参照して説明する。第１図は
本発明の第１の実施例のＩＣカードを示す斜視図であ
る。同図において、本実施例のＩＣカードは、従来例と
同様な一対の金属ケース１１と、一対の絶縁性シート１
２と、メス型コネクタ１６を有し複数のＩＣ１７が搭載
されたプリント基板１５とを含む。さらに本実施例は、
前述の従来例と異なる部品、即ち一体の導電性フィルム
（例えば導電性樹脂）１３，一対の絶縁性フィルム１４
を追加し、また導電性フィルム１３の一端とプリント基
板１５上に設けられた専用電極102とを、導電材（例え
ば、銅線）１０１により電気的に接続し、前記専用電極
１０２とプリント基板１５上の電源又はＧＮＤ配線１０
４とを抵抗器１０３で結線した。ここで、専用電極１０
２は、プリント基板１５の表面及び裏面に形成され、両
者はスルーホールにより電気的にシヨートされている。
又、導電材１０１は、第１図に示されるものより、実際
には十分短かくすることが可能である。Next, the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an IC card according to a first embodiment of the present invention. In the figure, the IC card of this embodiment has a pair of metal cases 11 similar to the conventional example, and a pair of insulating sheets 1.
2 and a printed circuit board 15 having a female connector 16 and having a plurality of ICs 17 mounted thereon. Further, this embodiment is
Parts different from the above-mentioned conventional example, that is, an integrated conductive film (for example, a conductive resin) 13, a pair of insulating films 14
In addition, one end of the conductive film 13 and the dedicated electrode 102 provided on the printed circuit board 15 are electrically connected by a conductive material (for example, copper wire) 101, and the dedicated electrode 102 and the printed circuit board 15 are added. Upper power supply or GND wiring 10
4 and 4 were connected by a resistor 103. Here, the dedicated electrode 10
2 is formed on the front surface and the back surface of the printed circuit board 15, and both are electrically shorted by through holes.
Further, the conductive material 101 can actually be made sufficiently shorter than that shown in FIG.
今、本実施例のＩＣカードに於て、金属ケース１１に静
電気を徐々に帯電していくと、やがて金属ケース１１と
導電性フィルム１３との間に放電が起こる。放電に伴な
い、導電性フィルム１３上で放電箇所を中心にして電流
が流れるが、導電性フィルム１３を層抵抗を適当に大き
な値に設定することにより、放電電流を実効的に放電箇
所の近傍領域内でしか流れない様にすることができる。
即ち、放電エネルギは導電性フィルム１３上の放電箇所
の近傍領域の抵抗体にて熱エネルギに変換されると考え
ることができる。従つて、金属ケース１１に与えられた
静電気に、必ず導電性フィルム１３上へ放電し、しかも
導電性フィルム１３内にてエネルギ消費されるので、プ
リント基板１５上の搭載ＩＣ及び回路配線への静電気に
よる影響が防止されることがわかる。Now, in the IC card of the present embodiment, when the metal case 11 is gradually charged with static electricity, electric discharge eventually occurs between the metal case 11 and the conductive film 13. Along with the discharge, a current flows on the conductive film 13 centering on the discharge location. By setting the layer resistance of the conductive film 13 to an appropriately large value, the discharge current is effectively close to the discharge location. It can be made to flow only in the area.
That is, it can be considered that the discharge energy is converted into heat energy by the resistor in the region near the discharge location on the conductive film 13. Therefore, the static electricity applied to the metal case 11 is surely discharged onto the conductive film 13, and energy is consumed in the conductive film 13. It can be seen that the effect of is prevented.
尚、抵抗器１０３は、導電性フィルム１３とプリント基
板１５との間の静電気による放電を防止する為の抵抗器
で、例えば１０ＫΩに設定される。外被の金属ケース１
１と異なり、導電性フィルム１３、プリント基板１５に
は静電気の帯電は少ないと考えられるが、徐々に帯電さ
れていく状況も考えられるので、抵抗器１０３を設ける
ことがより好ましい。The resistor 103 is a resistor for preventing discharge between the conductive film 13 and the printed board 15 due to static electricity, and is set to, for example, 10 KΩ. Metal case 1
Unlike No. 1, it is considered that the conductive film 13 and the printed circuit board 15 are less charged with static electricity. However, since it is possible that the conductive film 13 and the printed circuit board 15 are gradually charged, it is more preferable to provide the resistor 103.
以上の様に、本実施例のＩＣカードは、前述の従来の欠
点であつた、金属ケースとプリント基板上の回路配線と
の間の静電気放電によるＩＣカード内のデータ破壊、ま
たはＩＣ自体の破壊を防止することができ、従来例に比
べて静電耐圧を著しく向上させることができる。As described above, the IC card of this embodiment has the above-mentioned conventional drawbacks, namely, the data destruction in the IC card due to the electrostatic discharge between the metal case and the circuit wiring on the printed circuit board, or the destruction of the IC itself. Can be prevented, and the electrostatic breakdown voltage can be significantly improved as compared with the conventional example.
次に本発明の第２の実施例のＩＣカードを説明する。本
発明の第２の実施例では、前述の第１の実施例における
抵抗器１０３を、プリント基板１５上に形成された１０
ＫΩ印刷抵抗体（図示せず）として構成される。この印
刷抵抗の使用により、プリント基板上に抵抗器が占有す
る面積が従来より減少し、またコストダウンが実現で
き、かつ第１の実施例と同様に高い静電耐圧を実現する
ことができる。Next, an IC card according to the second embodiment of the present invention will be described. In the second embodiment of the present invention, the resistor 103 of the first embodiment described above is formed on the printed circuit board 15 by 10
Configured as a KΩ printed resistor (not shown). By using this printing resistor, the area occupied by the resistor on the printed circuit board can be reduced as compared with the conventional one, the cost can be reduced, and a high electrostatic breakdown voltage can be realized as in the first embodiment.
前述の各実施例では、導電性フィルム及び絶縁性フィル
ムはそれぞれ表面用と裏面用の２枚ずつで構成されてい
たが、本発明によれば、フレキシブルな材質のフィルム
を用いることにより、それぞれ１枚のフィルムを用い
て、プリント基板を二重、三重に包み込んだ構造とする
こともできる。In each of the above-mentioned embodiments, the conductive film and the insulating film are each composed of two sheets, one for the front surface and the other for the rear surface. It is also possible to have a structure in which a printed circuit board is wrapped in a double or triple layer by using a single film.
以上説明した様に、本発明は、金属ケースとプリント基
板との間に導電性フィルムを設けることにより、静電気
による金属ケースとプリント基板上の回路配線との間の
直接放電を防止し、かつ導電性フィルムとプリント基板
上の電源又はＧＮＤ配線を抵抗器を介して電気的に接続
することにより、静電気による、導電性フィルムとプリ
ント基板上の回路配線の間の放電を防止することによつ
て、従来のＩＣカードに比べて静電耐圧を著しく向上さ
せる効果がある。As described above, the present invention prevents the direct discharge between the metal case and the circuit wiring on the printed circuit board due to static electricity by providing the conductive film between the metal case and the printed circuit board, and By electrically connecting a conductive film and a power supply or GND wiring on a printed circuit board through a resistor, it is possible to prevent discharge between the conductive film and circuit wiring on the printed circuit board due to static electricity. It has an effect of significantly improving the electrostatic breakdown voltage as compared with the conventional IC card.
第１図は本発明の第１の実施例のＩＣカードを分解して
示す斜視図、第２図(a)は従来のＩＣカードの斜視図、
第２図(b)は第２図(a)のＩＣカードの内部構成を分解し
て示す斜視図である。 １１…金属ケース、１２，１４…絶縁性フィルム、１３
…導電性フィルム、１５…プリント基板、１６…メス型
コネクタ、１７…ＩＣ、１０１…導電材、１０２…専用
電極、１０３…抵抗器、１０４…電源又は接地（ＧＮ
Ｄ）配線。FIG. 1 is an exploded perspective view of the IC card of the first embodiment of the present invention, and FIG. 2 (a) is a perspective view of a conventional IC card.
2 (b) is an exploded perspective view showing the internal structure of the IC card of FIG. 2 (a). 11 ... Metal case, 12, 14 ... Insulating film, 13
... conductive film, 15 ... printed circuit board, 16 ... female connector, 17 ... IC, 101 ... conductive material, 102 ... dedicated electrode, 103 ... resistor, 104 ... power supply or ground (GN)
D) Wiring.
Claims (2)
金属ケース内に収納したＩＣカードに於て、前記プリン
ト基板と前記金属ケースの間に、第１の絶縁性フィル
ム、導電性フィルム、第２の絶縁性フィルムをこの順番
で重ねた三重フィルム構造を設け、前記導電性フィルム
と前記プリント基板上の専用電極とを電気的に接続し、
前記専用電極と前記プリント基板上の電気回路に於ける
電源配線又は接地配線との間を１ＫΩ以上の抵抗体を介
して電気的に接続したことを特徴とするＩＣカード。1. A printed circuit board on which an integrated circuit device is mounted,
In an IC card housed in a metal case, a triple film structure in which a first insulating film, a conductive film, and a second insulating film are stacked in this order between the printed circuit board and the metal case. Provided, electrically connecting the conductive film and the dedicated electrode on the printed circuit board,
An IC card, wherein the dedicated electrode and a power supply wiring or a ground wiring in an electric circuit on the printed circuit board are electrically connected via a resistor of 1 KΩ or more.
刷抵抗体である特許請求の範囲第１項記載のＩＣカー
ド。2. The IC card according to claim 1, wherein the resistor is a printed resistor formed on a printed circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62259019A JPH06438B2 (en) | 1987-10-13 | 1987-10-13 | IC card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62259019A JPH06438B2 (en) | 1987-10-13 | 1987-10-13 | IC card |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0199893A JPH0199893A (en) | 1989-04-18 |
| JPH06438B2 true JPH06438B2 (en) | 1994-01-05 |
Family
ID=17328222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62259019A Expired - Fee Related JPH06438B2 (en) | 1987-10-13 | 1987-10-13 | IC card |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06438B2 (en) |
-
1987
- 1987-10-13 JP JP62259019A patent/JPH06438B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0199893A (en) | 1989-04-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |