JPS5844586A - Magnetic card device - Google Patents

Abstract

PURPOSE:To improve the reliability of a magnetic card, by providing a 1-chip microcomputer element and a photomagnetic recording medium on a card-shaped substrate and using the recording medium to a memory of a microcomputer to ensure an application for various types cards as well as to store the face image, the seal impression pattern, etc. of the card owner. CONSTITUTION:A 1-chip microcomputer 2 is buried into a card-shaped substrate 1 made of the synthetic resin, etc., and a photomagnetic memory 3 is set at a position apart from the computer 2. The memory 3 has the force of magnetization in the heating condition as well as the fixed coercive force. Then an amorphous thin film 31 and a silicon nitride thin film 32 is formed to the memory. Thus the memory 3 is used to the computer 2. The computer 2 contains a microcomputer part 23 formed on a silicon substrate 22, a print substrate 24 and an electrode 21. Thus the storage capacity is increased for a bank deposit card, a credit card, etc., and at the same time the face image, the voice information, etc. of the card owner are stored. As a result, the reliability is improved to a magnetic card.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic card device, and particularly to a magnetic card device that is formed into a shape that can be easily carried, and that can be used to obtain various types of certification by being electrically connected to a card reader installed in a silver plate or the like. Concerning magnetic cards@hidden.

Magnetic cards have conventionally been used in stamping cards, deposit cards, credit cards, vending machine cards, identification cards, and the like. This magnetic card is made of γ-F' 20s * Cr on a substrate made of synthetic resin such as vinyl chloride.
A magnetic powder such as O2 is mixed with a binder and applied. Information is written into or read from the magnetic hard disk using a magnetic head. By the way, since the recording medium of conventional magnetic cards is γ-Feto type or CR02 type, there is a limit to increasing the recording capacity, and in the case of a ring, the recording density is 10 pits/
It is about C-2. Furthermore, since information is loaded and read using a magnetic method such as a magnetic head, it is easily affected by external magnetic fields, which could change the information recorded on the card.

On the other hand, a one-chip microcomputer embedded in a substrate made of synthetic resin or the like has been put into practical use. . Such a card can reduce the burden on the central computer processing card 0 data. In addition, each application of Haku is also considered. Such a system technology is described in, for example, Japanese Patent Application Laid-open No. 51-15947. By the way, a one-chip microcomputer has a memory formed therein, but the capacity of this memory is relatively small, and is about 0.5 bytes in a 11-inch microcomputer. Even if a magnetic recording medium such as the one described above is added to a card, a significant increase in storage capacity cannot be expected because the recording capacity is low.

Therefore, the main purpose of this invention is to provide a magnetic card with a very large storage capacity.

In summary, this invention is a method in which a magneto-optical recording medium, in which a coercive force is fixed by applying a magnetizing force under heating, and a one-chip microcomputer are formed on a card-shaped substrate. .

The present invention will be described in more detail below along with embodiments shown in the drawings.

FIG. 111 is a plan view showing an embodiment of the present invention. FIG. 2 is a cross-sectional view of main parts taken along line 1-1 in FIG. 1. base 1
11 is made of, for example, synthetic resin, and is formed into a card shape. A one-chip microcomputer 2 is embedded in this substrate 1.

That is, the microcomputer section 23 is formed on the silicon substrate 22 by a well-known process. A printed circuit board 24 is placed over the microcomputer section 23 to prevent damage due to contact from the outside.

Further, in order to electrically connect the microcomputer section 23 and the card reader, an electric current is provided through the printed circuit board 24. This electrode 21
For example, gold is used for its conductivity and corrosion resistance.

Furthermore, a magneto-optical memory 3 is provided on the substrate 1. This magneto-optical memory 3 includes, for example, an amorphous thin film 31. The amorphous thin film 31 is made of, for example, GdCo,
Targeting a sintered body of a mixture of GdFe, TbFe, GdTbFe, etc., it is formed to have a thickness of 5000 angstroms to 1000 angstroms by a high frequency sputtering method in a vacuum of 10 to 10 OPr in Arsag. Ru. In addition, this 111131° is not only one layer,
The target may be formed in two layers or in &131 if necessary. Furthermore, amorphous thin film 31v
), an amorphous silicon nitride (81,N, ) thin film 32 is formed on the surface of the silicon nitride (81,N,
It is formed as an anti-oxidation film or an anti-reflection film for l1131.

By the way, the present inventor has devised a technology related to the magneto-optical memory 3 in Japanese Patent No. 111856-114155, in which he describes in detail the operation 111m1 of the magneto-optical memory. Therefore, a simple operation l[W of the optical-air memory 3 will be explained here.

First, the magneto-optical memory 3 is magnetized in a certain direction to increase its concentration, and the magneto-optical memory 3 is magnetized in a certain direction (direction from one side to the other). Next, a magnetic field is applied in a direction opposite to the magnetization direction, and the recording surface is partially heated by a laser beam or the like. Then, the direction of magnetization is reversed only in the portion that is irradiated with the laser beam, that is, the heated portion. In this way, information is written into the magneto-optical memory 3.

In the magneto-optical memory 3 in which information has been written as described above, the light that passes or is reflected between the parts where the magnetization direction is reversed and the part where the magnetization direction is not reversed has a magneto-optical (7) Rady effect or Kerr effect. It receives different planes of polarization through it.

Reading of information from the magneto-optical memory 3 is performed using this magneto-optical characteristic. That is, the magneto-optical memory 3
For example, information is reproduced by applying a laser beam and detecting the characteristics of the reflected light.

FIG. 3 is an illustrative view showing a card reader for reading information from the card devices of FIGS. 1 and 2. FIG. In FIG. 3, an interface 5 and an information readout @116 are provided inside the main body 4 of the card reader. The interface 5 is provided with a conductive needle 51. This needle 51 can be raised and lowered in the vertical direction, for example in FIG.

FIG. 4 is a block diagram of FIG. 3. Inter 7A branch 5 is an external III (for example, central computer) not shown.
This enables information transmission between the microcomputer 2 and external devices. On the other hand, information reading @1l16 uses a semiconductor laser 6 for irradiating the magneto-optical memory 3 with T the light.
1. It includes a detection 1162 that reproduces an information signal based on the reflected light from the magneto-optical memory 3, and the like. The semiconductor laser 61 is connected to the interface 5 and its driving is controlled by the microcomputer 2. On the other hand, detector-62
is also connected to the interface 5, and provides information read from the magneto-optical memory 3 to the microcombi 1-2 via the interface 5.

As described above, the magneto-optical memory 3 is used as the memory of the microcomputer 2. This magneto-optical memory 3
The recording ff1l[ is, for example, about 10 pits/C-2, which is about 100 times larger than conventional magnetic recording. Therefore, the storage capacity of the magnetic card device can be dramatically increased.

As described above, according to the present invention, if a card-like base is
By providing a chip microcomputer card and a magneto-optical recording medium, and using this magneto-optical recording medium as a memory for a single-chip microcomputer element, the storage capacity of the magnetic card device can be dramatically increased compared to the conventional one. I can do it.

Therefore, by using it for bank deposit cards, credit cards, vending machine cards, and ID cards, it is possible to record the facial image of the cardholder, which was previously considered impossible, and to record the cardholder's seal pattern and voice. Information can be stored, and credibility can also be verified.

Furthermore, in magneto-optical recording media, the recorded information is less likely to be fluctuated by external magnetic fields.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention. Second
al is a sectional view taken along the line "A" in FIG. 1. FIG. 3 is an illustrative view showing a card reader used to read information from the magnetic card devices of FIGS. 1 and 2. FIG. FIG. 4 is a block diagram of FIG. 3. In the configuration, 1 is a substrate, 2 is a one-chip microcomputer, 3 is a magneto-optical memory, 5 is an interface 7I, and 6 is an information reading device. Patent applicant: Tateishi Electric Co., Ltd. 9- Figure 4

Claims (3)

[Claims] (1) A card-shaped substrate, a magneto-optical recording medium formed on the card-shaped substrate and in which a holding force is fixed by applying magnetizing force under heating, and
- A magnetic card device comprising a one-chip microcomputer element formed on the card-shaped substrate separately from the magneto-optical recording medium; (2) Optically reading information from the magneto-optical recording medium.
2. The magnetic card device according to claim 1, further comprising: information reading means; and 1,000 pins electrically connecting said information reading means and said one-chip microcomputer element. (3) The information reading means includes: a laser light source that irradiates a laser beam onto a light-distributing magnetic recording medium; and an information signal reproducing device that detects reflected light from the magnetic recording medium and reproduces an information signal. 2. The magnetic card device according to claim 2, further comprising means for controlling the drive of the one-chip microcomputer element and the laser beam waterfall.