JP2001236479A - Contactless ic card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a contactless IC card capable of reduced man-hours, satisfactory in productivity and reduced cost. SOLUTION: This contactless IC card has a flexible substrate, where a spiral antenna coil and a circuit pattern are formed and a circuit module formed by connecting an IC chip to the circuit pattern and sends and receives information to and from external equipment through the antenna coil, and a cut part is formed at the periphery of the inner peripheral side end part of the spiral antenna coil, formed on the flexible substrate and the inner peripheral side end part of the antenna coil is folded back together, with the flexible substrate from the cut part and connected to the circuit pattern provided on the outer peripheral side of the antenna coil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact type IC card, and more particularly to a connection between an antenna coil formed on a flexible circuit board and a circuit pattern.

[0002]

2. Description of the Related Art A non-contact type IC card transmits and receives data wirelessly using radio waves without a contact. The non-contact type IC card has no contact with the reader / writer, so there is no contact failure due to dirt or friction, so the maintenance cost can be greatly reduced, and the card can be used without restrictions on the card insertion direction and front and back when used. be able to. Non-contact type IC cards have a wide range of applications, and their use as substitutes for commuter passes, driver's licenses, telephone cards, cash cards, etc. is being considered. It is being developed as an alternative to cards.

[0003] The structure of a non-contact type IC card is such that a circuit module formed by forming a required circuit pattern and an antenna coil for non-contact communication on a circuit board and mounting an IC chip on the circuit board is made of plastic. A structure embedded in a card base made of a film or the like is generally used.

FIG. 1 is a top view showing a circuit module portion in a conventional example of a non-contact type IC card. The antenna coil 2 is formed in a spiral shape on the circuit board 1 and is connected to electrodes at both ends of the IC chip 3. The outer peripheral end of the antenna coil 2 is connected to one electrode terminal of the IC chip 3, and the other electrode terminal of the IC chip 3 is connected to the circuit pattern 5. Although a connection method is not shown, a method in which bumps are provided on the lower surface of the IC chip and directly mounted, or a method by wire bonding is used. One end of the inner peripheral portion of the antenna coil 2 formed on the circuit board 1 needs a means for drawing out to the other end side (circuit pattern 5). In a conventional example, a through hole 4 is formed in the circuit board 1. (The through hole 4 is connected to the end of the inner peripheral portion of the antenna coil 2), and the end of the inner peripheral portion of the antenna coil 2 is connected via a connection wiring 4 a formed on the back surface side of the circuit board 1. The portion is drawn out to the circuit pattern 5 provided on the outer peripheral portion. 5a is a through hole on the circuit pattern side.

FIG. 2 is a top view showing a circuit module section in another conventional example of a non-contact type IC card. Using a circuit board 6 on which an antenna coil 7 for non-contact communication and a circuit pattern 8 are formed, an IC chip 9 is mounted on the circuit pattern 8 to constitute a circuit module. Antenna coil 7
Are provided with land patterns at both ends, 10 is a land pattern provided at the inner peripheral end, and 11 is a land pattern provided at the outer peripheral end. One electrode terminal of the IC chip 9 is connected to a land pattern 11 provided on the outer peripheral end of the antenna coil, and the other electrode terminal is connected to the circuit pattern 8. The land pattern 10 at the inner peripheral end is the circuit pattern 8
And a bridge member 12 having electrical conductivity so as to straddle the antenna coil 7.

[0006]

As shown in the prior art, in order to draw out one end of an antenna coil to the other end using a through hole formed in a circuit board, a through hole is formed in the circuit board. However, there is a problem that a complicated process must be performed to perform the process, which takes a lot of man-hours and increases the cost of the non-contact type IC card.

Further, as shown in FIG. 2, when connecting using a bridge member, the man-hour and the member cost are increased, and the cost of the non-contact type IC card is increased. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a non-contact type IC card in which man-hours can be reduced, productivity is high, and cost is reduced.

[0008]

The present invention has a flexible substrate on which a spiral antenna coil and a circuit pattern are formed, and a circuit module in which an IC chip is connected to the circuit pattern, and is connected to an external device via the antenna coil. Contactless IC card that transmits and receives information between
A notch is provided around the inner peripheral end of the spiral antenna coil formed on the flexible substrate, and the inner peripheral end of the antenna coil is folded back together with the flexible substrate from the notch and provided on the outer peripheral side of the antenna coil. A non-contact type IC card connected to the provided circuit pattern.

[0009]

FIG. 3 is a partial top view of a circuit module part of a non-contact type IC card according to the present invention. Reference numeral 13 denotes a circuit board on which a spiral antenna coil 14 for non-contact communication and a circuit pattern 15 are formed. As the circuit board 13, a flexible board that can be deformed such as bent, twisted, or bent is used. Antenna coil 1
4 is formed in a spiral shape by a method of forming a metal layer on one surface of the circuit board 13 by etching or a method of printing and forming a copper or silver paste. Although not shown on the formed antenna coil 14, an insulating layer is formed in a portion excluding the land patterns 16 and 17. Reference numeral 16 denotes a land pattern provided on the inner peripheral end of the antenna coil 14, and reference numeral 17 denotes a land pattern provided on the outer peripheral end of the antenna coil 14. The land pattern 17 and the circuit pattern 15 are connected to respective electrode terminals of an IC chip (not shown). Reference numeral 18 denotes a cutout provided around the inner peripheral end of the antenna coil 14 of the circuit board 13. A notch 18 is provided, and the end of the antenna coil 14 provided with the land pattern 16 is folded back together with the circuit board 13 (flexible board) so that the land pattern 16 can be connected to the circuit pattern 15 provided outside the antenna coil 14. It was done.

FIG. 4 is a partial top view of the circuit module portion of the non-contact type IC card of the present invention. FIG. 5 is a side view of FIG. FIG. 9 is a view showing a state where the semiconductor device is folded and connected to a circuit pattern 15.

Notch 18 provided on circuit board 13
As a result, the inner peripheral end of the antenna coil 14 is folded back onto the circuit pattern 15 provided outside the antenna coil 14, and the land pattern 16 and the circuit pattern 15 are connected in a bridge shape so as to straddle the antenna coil 14. It is the structure which was done. The antenna coil 14 does not necessarily have a bridge structure. Even if a portion straddling the antenna coil 14 comes into contact, the antenna coil 14 itself has an insulating layer (not shown) on its surface, so that there is no problem such as short circuit.

Reference numeral 19 denotes an IC chip which is mounted on the circuit pattern 15 and the land pattern 17 to constitute a circuit module. The circuit module portion is embedded in a card base made of a plastic film or the like to complete a non-contact type IC card.

[0013]

According to the present invention, a notch is provided around the inner peripheral end of the antenna coil formed on the flexible substrate, and the end is bent to be connected to a circuit pattern provided on the outer periphery of the antenna coil. Can be easily pulled out, and the number of steps can be reduced. Further, there is no need to use a double-sided board, and it is not necessary to use another member, so that a low-cost non-contact IC card can be provided.

[Brief description of the drawings]

FIG. 1 is a top view showing a circuit module section in a conventional example of a non-contact type IC card.

FIG. 2 is a top view showing a circuit module section in another conventional example of a non-contact type IC card.

FIG. 3 is a partial top view of a circuit module part of the non-contact type IC card of the present invention.

FIG. 4 is a partial top view of a circuit module part of the non-contact type IC card of the present invention.

FIG. 5 is a side view of FIG. 4;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 circuit board 2 antenna coil 3 IC chip 4 through hole 4 a connection wiring 5 circuit pattern 5 a through hole 6 circuit board 7 antenna coil 8 circuit pattern 9 IC chip 10 land pattern 11 land pattern 12 bridge member 13 circuit board 14 antenna coil 15 Circuit pattern 16 Land pattern 17 Land pattern 18 Notch 19 IC chip

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H01Q 7/00 G06K 19/00 K

Claims (1)

[Claims] An information processing apparatus includes: a flexible substrate on which a spiral antenna coil and a circuit pattern are formed; and a circuit module in which an IC chip is connected to the circuit pattern. In the non-contact type IC card for transmitting and receiving data, a notch is provided around the inner peripheral end of the spiral antenna coil formed on the flexible substrate, and the inner peripheral end of the antenna coil is flexibly cut from the notch. A non-contact type IC card, wherein the substrate is folded back and connected to a circuit pattern provided on an outer peripheral side of an antenna coil.