JPS6259096A - 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] [Technical field of invention] This invention relates to an IC card.

[Background of the Invention] In recent years, various IC cards containing an IC chip storing a password have been developed, but if the password is known by an expert, for example, it is a forgery.

In this case, the counterfeiter manufactures the IC card using a commercially available microcomputer. Therefore, even if the internal circuit is different from the original IC chip, it is not visible from the outside, so
The store clerk cannot tell that it is a counterfeit product, and can use it openly as if it belongs to the rightful owner.

However, even for counterfeiting by such experts, it is extremely difficult to imitate genuine IC chips, which require extremely expensive manufacturing equipment.

[Purpose of the Invention] This invention was made by paying attention to the fact that it is difficult to imitate an ICC flip.The purpose of this invention is to prevent counterfeiting and to easily and easily identify whether or not a product is a counterfeit. The purpose of the present invention is to provide an IC card that can be identified by

[Summary of the invention] □In order to achieve the above-mentioned object, the present invention makes the main surface of the IC chip transparent from the outside of the card body,
The arrangement of each block such as ROM, RAM, etc. provided on the IC chip is made into visible identification information.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

1 in the figure is the card body. As shown in Fig. 3, this card body 1 has a film substrate 5 with an IC chip 4 housed in a core 2.3 stacked above and below, and a film 6.7 bonded to the top and bottom surfaces. As shown in FIG. 1, the upper film 6 on the main surface side has an electrode terminal section 8, a chip section 9, a magnetic stripe section 10, and a published book title display section 1.
1 is provided. In this case, the top film 6 is transparent so that the IC chip 4 inside the card body l can be seen, and an opening 6a in the terminal portion 8 is provided.
... are formed into an array. The film substrate 5 is disposed in a housing portion 2a formed in the upper core 2, and electrode terminals 5a++ are provided on the upper surface of the film substrate 5 in correspondence with the openings 6a of the upper film 6. The IC chip 4 is arranged in a housing part 3a formed in the film substrate 5 and the lower core 3, and electrode terminals 5aa++ provided on the upper surface of the film substrate 5 extend from the electrode pads 4a... The extended portions are electrically connected to each other and covered with transparent anti-oxidation material 17912.

By the way, the IC chip 4 stores information necessary for the card, such as a personal identification number, and includes blocks A to D such as a ROM, RAM, and random gate. For example, as shown in FIG. 2, these blocks A to D have RO
M (read only memory) blocks A and B are arranged between which a RAM (random access memory) block C and a random gate block D are arranged. Such blocks A to D can be easily identified by differences in manufacturing method, gate density, wiring, etc. of each block. In other words, in ROM and RAM, each gate is arranged in an extremely dense matrix, whereas in a random gate block, each gate and wiring are relatively restricted and arranged irregularly. For example, in the case shown in FIGS. 1 and 2, the ROM blocks A, B, and RAM block C are the random gate block D. It is clearly distinguished from the ``C'' character, and the entire character is recognized as the letter ``C''. Characters and symbols recognized by this RAM and ROM,
By using patterns, etc. as unique identification information of a specific manufacturer or issuer (for example, a credit company, etc.), a different form can be created! All counterfeit products listed in step 8 can be recognized as counterfeit by a store clerk at the time of purchase.

Therefore, as mentioned above, the I
The ROMA, B, and RAMC of the C chip 4 represent identification information such as unique characters, symbols, patterns, etc., and can be seen from the outside through a transparent top film 6 provided on the top surface of the card body 1. According to this IC card, another IC card that operates in exactly the same way electrically can be used.
Even if an IC card is forged using a C-chip, a clerk who knows the identification information of the manufacturer or issuer of the IC card can easily and easily determine whether the IC card is genuine or not. be able to. In this case, counterfeiting a product that is exactly the same as a genuine IC chip requires equipment and equipment that costs a huge amount of money, and since such a thing is completely difficult based on social conventions, it is virtually impossible to completely counterfeit a product. This can be prevented.

In addition, in the embodiment described above, each block A of the IC chip 4
Although -D represents a character in the shape of an English letter rCJ, the present invention is not limited thereto, and may be other characters, complex symbols, patterns, etc.

Further, the structure for accommodating the IC chip is not limited to the embodiment.

[Effects of the Invention] As explained above, according to the IC card of this invention,
The main surface of the IC chip is transparent from the outside of the card body, making it possible to see the arrangement of each block such as ROM and RAM installed on the IC chip. It is possible to easily and reliably determine whether the product is a product or not.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is an external plan view of an IC card, Fig. 2 is an enlarged plan view of the IC chip, and Fig. 3 is an enlarged sectional view of the IC card. main body,
4...IC chip. 6.Top film, A, B-...RAM block,
C・--RAM block, D・kai・random gate block. Patent applicant: Casio Computer Co., Ltd. JB, "--'--"-1st generation attorney Patent attorney Machi 1) Shun 1. :′. ``-J Clause Figure 2

Claims (2)

[Claims] (1) In an IC card that stores an IC chip in which information such as a PIN number is stored inside the card body, the main surface of the IC chip can be seen from outside the card body; An IC card characterized in that the arrangement of each block such as ROM, RAM, etc. can be visually confirmed. (2) The IC card according to claim 1, wherein the arrangement of each block is configured such that it can be recognized as a predetermined character, symbol, pattern, etc. by ROM, RAM, random gate, etc. .