JPS6213397A - Integrated circuit card - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a so-called IC card.

Traditional technology memory function, rectification function, arithmetic function, oscillation function, tuning function,
Cards in which an integrated circuit having one of the light-emitting functions or a combination of these functions is built into a commonly used plastic substrate such as hard vinyl chloride are called Chig-Inker P% LSI cards, IC cards, etc. In this specification, these cards or sheets of the same machine will be collectively referred to as IC cards.

These IC cards have recently been put into practical use and are being used in telephone cards, credit cards, CD cards, medical data cards, and the like. Standardization of these cards is 150. TC9? , is being discussed by SC-/7WG-DA.

IC cards that have been prototyped or partially put into practical use are:
It has a structure in which power terminals, signal input terminals, signal output terminals, etc. are installed on the edge or surface of the card and their functions are exposed, and IC cards are connected via mechanical contacts. It was designed to send and receive signals, JC sources, and signal input/output to and from the terminal.

One point that the invention is trying to solve is that such an IC card is always carried and held with fingers, etc., so if the contact part is exposed on the surface as in the past, the contact part will be exposed to finger pads, sweat, etc. It is often contaminated with dust in the atmosphere, other oils, seasonings, etc. Also, since terminals are installed outdoors, the contacts of the card are easily contaminated with dust and other substances, making it difficult to send and receive signals. It lacked confidence.

In order to solve this problem, it is conceivable to provide the same function in multiple locations, but this would spoil the aesthetics of the card or lead to higher costs. Put it away. In addition, as a solution to such problems, for example, Jitsukaiaki, tp-i! In R-Hong Publication No. 7/3, etc., an oscillation function element having a specific frequency is added, and the Tsubame J signal is transmitted to the terminal without contact.
Techniques for achieving functionality have been disclosed, and also published in Tokukaisho! 9-2023g1 publication,! Kotobuki 59-202
, tg publication, Utility Model Application Publication No. 5G-1G'YG Otsu No. 0, Utility Model Application Publication No. 59-Q2-De3 Otsu, etc. also disclose methods for transmitting and receiving source, human output, and power signals without contact. has been done. However, with these conventional techniques, attenuation of signal transmission and reception occurs due to magnetic resistance, etc. in the transmission and reception of input and output signals, and it is not necessarily possible to perform efficient and reliable power transmission and reception and signal transmission and reception. There wasn't.

An object of the present invention is to solve the above-mentioned problem.
c-card.

According to the present invention, there are four memory functions, a rectification function, arithmetic function, and
An IC with a built-in integrated circuit that has any one of four functions, such as a jjR function, a tuning function, a light emission function, a single function, etc., or a combination thereof.
In the card, for the card of the IC car F' oath reading terminal, 4 consists of a combination of a high magnetic permeability core member and a coil that performs electromagnetic inductive coupling with the source terminal and the induction terminal for high frequency input/output signals. An inductive element is disposed and at least a portion of the inductive element is located on the card surface.

Embodiments Next, the present invention will be described in more detail with reference to embodiments of the present invention based on the accompanying drawings.

Figure N1 is an oblique view of a contactless IC card as an embodiment of the present invention, and Figure 1 is a cross-sectional view taken along line x-x' in Figure 1.
This is a diagram showing the connection relationship between the cross section and the terminal for taking the number of ICC card entries.
Vinyl acetate 1. The card base 10 is made of a synthetic resin or the like. Generally credit card or C
As a card base for an IC card used for a D card or the like, a hard chlorinated vinegar vinyl having a total thickness of 0.7 to θg-accumulation is used.

Inside this card base lO are written i, i! J: Integrated circuit 11 having any one of A function, rectification function, arithmetic function, oscillation function, tuning function, light emission function, etc. or a combination thereof.
is installed. This integrated circuit 11 has a tg input terminal 11A, a signal input terminal 11B, and a signal output terminal 11.
It has c. Of course, these terminals are not actually exposed on the surface of the cart S body 10. Card base 10
includes a high magnetic permeability core member 12 and this high magnetic permeability core member 1.
A dielectric 4 element consisting of a coil 18 wound around the coil 18, a dielectric 4 element consisting of a high magnetic permeability core member 14 and a coil 15 wound around the high magnetic permeability core member 14, and a high magnetic permeability core member. 16 and a coil 17 wound around the high magnetic permeability core member 16 are provided. These high magnetic permeability core members 12, 14 and 16 are made of a high magnetic permeability material such as suit or malloy (μa: 100.
00θ), Permalloy (μa=gooo), Sendust (μa: 3υ000) or amorphous high permeability material, and N1-M7Elite (μa: 250
), Mn-Zz 7 x 54 Ctta: 20
It is made of a material selected depending on the application, such as 00). Generally, when taking the shape of a credit car ■9, the thickness is 0.
．． 7-0. g'' range, and if it is manufactured within that thickness, there will be no practical epithelium, so when the above alloy type is used, the core member may be a single layer or a 4° Δ-shaped one. .

As clearly shown in FIG. 2, the outer surface S of each portion of the core member 12 is formed substantially flush with the card surface. There is no practical problem in providing an overcoat, a colored layer, a printed layer, etc. with a thickness of 30 μm or less on the Dedein or on top of it to prevent staining of the high magnetic permeability material.

In this embodiment, the distal end surface 12A of each leg of the core member 12 is
and 12B appear on the edge of the card, but these 4
As will be described later, the surfaces 12A and 12B do not necessarily have to be located all the way to the end surfaces of the card.

The inductive element consisting of the core member 12 and the coil 18 constitutes an element for the transmission power receiver 1d for the power source, and the core member 14 and the coil 15 constitute the element. The 1FjSS element constitutes an element for receiving input signals from the outside, and includes the core member 16 and the coil 1.
The output of the inductive element consisting of 7 constitutes a signal transmitting element. Both ends of the coil 13 are connected to lead wires 18 and 19.
The coil 15 is connected to the signal input terminal 11A of the integrated circuit 11 using a similar lead wire. Both ends are connected to the signal output terminal 11c of the integrated circuit 11 using similar lead wires.

Furthermore, in this embodiment, a ground contact 20 exposed on the surface of the card base 100 is provided. This ground contact 2
0 is connected to the ground lines of each coil 13, 15 and 17. The ground contact zO has a relatively large area, and is designed so that it can come into close contact with the ground contact (not shown) of the IC card reading terminal (not shown) during function if necessary. The electromagnetic functions of the machine should be stabilized. That is, this is to eliminate electromagnetic induction, other external noises, and other interference when this card is used in combination with a terminal.

Next, the method of transmitting and receiving signals of the IC card of this embodiment will be explained with particular reference to FIG.

This IC card reading terminal is provided with a high 6 magnetic core member 21 as a terminal J conductive element and a coil 22 wound around the high magnetic permeability core member 21. The arrangement of the high magnetic permeability core member 21 is such that when an IC card is inserted into this write/read terminal, the outer surface S of each leg of the high magnetic permeability core member 12 of the IC card is It is said to be positioned opposite the inner surface of the leg. In this manner, the power receiving element of the IC card is closely electromagnetically coupled to the terminal induction element comprising the core member 21 and the coil z2. That is, core member 2
1 and the core member 12 form a magnetic closed circuit, and the coil 32
When an alternating current is applied to the coil 18, the coil 22
A voltage approximately proportional to the number of turns of the coil 18 is generated, which is input to the power input terminal 11A of the integrated circuit 11 via lead wires 18 and 19, and is rectified if necessary to generate an operating current for the integrated circuit. .

Similarly, the write/read terminal is provided with a terminal inductive element for signal input and a terminal inductive element for signal output, in addition to the above-mentioned terminal inductive element for power input. The core member 14 and the coil 15, and the core member 16 and the coil 17 are partially connected in a G&, iA4 manner, but these have the same structure as the terminal inductive element for power input described above. Since they operate in the same way, I will not repeat them here.

FIG. 3 partially shows an IC card as another embodiment of the present invention.

In the IC card of this embodiment, a Y-shaped high magnetic permeability core member z3 is disposed on one surface of the car P base 10, and a coil a4 is wound around this core member 28. There is. This coil 22 may be a normal thin SD or a printed coil.

Similar to the embodiment of FIG. 1, both ends of the coil 24 are connected to power input terminals of the integrated circuit via lead wires 18 and 19. One end of the lead wire is connected to the ground contact zO
connected as necessary.

Core components
3 should be exposed to the surface of the card as much as possible, and this allows the high magnetic permeability core member 2 of the inductive element of the terminal to be exposed as much as possible.
It is possible to make a closed contact with 5 and form a magnetically closed circuit. Therefore, the coil 24 may be partially visible on the card surface. in this case,
Although it is necessary to provide sufficient insulation using an overcoat or the like, this can be easily accomplished using conventional techniques. A coil 26 is wound around the high magnetic permeability core member 25 of the terminal in the same manner as described with respect to FIG. The connection between the inductive element on the terminal side and the inductive element on the card side when the card is used is the same as that described with reference to FIGS. 1 and 2, and therefore will not be described again.

In the structure of the real 11fA row in FIG. 3, the shape of the core member is 1f! It is simpler than the embodiment shown in FIG.
It requires less material usage and is advantageous in terms of cost.

Effects of the Invention As mentioned above, according to the structure of the IC card of the present invention,
- Since it does not have a mechanical contact with the IC card reading terminal, the contact may become dirty with finger pads, sweat, dust in the air, other oils, etc. There will be no possibility that the reliability of the system will be compromised. Moreover, in the structure of the uninvented IC card, when the IC card is inserted into the terminal 1, the core member 12.21 and the core member z1.2
Since the 5 and 5 can be tightly coupled concentrically, energy loss can be suppressed to a small extent, and therefore the 4 source between the writing/reading terminal and the counterfeit, and the exchange of input/output signals, etc. Therefore, there is less chance of a drop in signal transmission and reception.
The reliability of the C card filtering function can be further improved by always performing efficient and reliable power transfer and signal transfer. Furthermore, the IC card according to the present invention has no through holes, notches, recesses, protrusions, etc. in appearance, and can have the same shape as the original in terms of external wind and design.

7 is a schematic perspective view of a non-fusible IC card as an embodiment of the present invention, and FIG.
A schematic diagram showing the connection relationship with a card writing/reading terminal;
FIG. 3 is a schematic diagram partially showing an IC card as another embodiment of the invention.

10. Card base 11. , , integrated circuit, 1
1 A, ..., 4 source input terminal, 11B...signal input terminal, IIc...-signal output terminal, 1B, 14.16
6.・High permeability core member, 13.15.1 ? ,,,
, coil, 20..., earth contact, 21.00. High magnetic permeability core member, 22. , , Coil , 2 B , , ,
High magnetic permeability core member・24...Coil, 2vh-・
... High magnetic permeability core member, 26... Coil.

Figure 1 Figure 2

Claims (2)

[Claims] (1) In an IC card that has a built-in integrated circuit that has a memory function, a rectification function, an arithmetic function, an oscillation function, a tuning function, a light emitting function, etc., or a combination of these functions, an IC
An inductive element consisting of a combination of a high magnetic permeability core member and a coil is arranged to perform electromagnetic inductive coupling with the card power supply terminal and high frequency input/output signal inductive terminal of the card writing/reading terminal. An IC card characterized in that at least a part of the inductive element is located on the card surface. (2) The IC card according to claim (1), wherein the inductive element is covered with a transparent oversheet, a colored layer, or a printed layer having a thickness of 50 μm or less.