JPH0541030Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to an IC card equipped with a backup power source of sufficient capacity to protect memory contents.

<Prior art> Some IC cards employ volatile random access memory RAM as their built-in memory, but in this case, in order to prevent the data stored in the RAM from volatilizing, the batteries are essential.

However, since the set thickness of an IC card is specified as 0.76 m/m, it is difficult to secure a battery with sufficient capacity for backup.

<Purpose of the invention> In view of the above circumstances, the present invention increases the capacity of the battery by mounting the circuit board and LSI chip necessary for an IC card on the card forming the battery structure.
The purpose is to enable long-term backup of IC chip memory.

<Example> The present invention will now be described with reference to the drawings.

FIG. 1 is a plan view of an IC card according to an embodiment of the present invention, and as shown, a card body 1 has a writing or reading terminal 2. As shown in FIG.

Figure 2 is a cross-sectional structural diagram of the IC card of this example, in which a positive (+) electrode plate (Sus) 3 and a negative (-) electrode plate (Sus) 4 are used for fixed electrolysis (also serving as a separator). 5 is being held. This forms a battery.

Moreover, the distance between both electrode plates 3 and 4 is determined by sealants 6a and 6.
The solid electrolyte 5 is sealed with the electrode plates 3 and 4 and the sealants 6a and 6b.

The sealing material 6b is provided inside (inside) the IC card body 1, unlike the sealing material 6a provided at the ends of both electrode plates 3 and 4. This is to mount a circuit board PWB 8 and an LSI chip (having a CPU and RAM) 9 necessary for an IC card in the space 7 formed by the two electrode plates 3 and 4 that are not in contact with the solid electrolyte 5. be.

In addition, 10 is an insulating layer, and the said positive electrode plate 3, the said negative electrode plate 4, the said circuit board 8, and
This prevents shots between LSI chips 9.

Power from the battery is supplied to the RAM of the LSI chip through wiring (not shown).

An upper decorative display film 11 is attached to the outer side of the positive electrode plate 3, and a lower decorative display film 12 is attached to the outer side of the negative electrode plate 4.

FIG. 3 shows the battery area (shaded area) P of the IC card of this embodiment, and the entire area except the area where circuit components are mounted is a battery. Note that when cut along the dashed line X-X', the result is as shown in FIG.

<Effects> As described above, according to the IC card of the present invention, approximately IC
Opposing positive and negative electrode plates that cover the entire card, an electrolytic part sandwiched between the two electrode plates, an extension part that extends both the electrode plates further from the electrolytic part, and an extended part sandwiched between the two electrodes. a sealing member provided in the section for sealing the electrolytic section; a circuit board and an integrated circuit chip mounted in a space between the extended section separated from the electrolytic section by the sealing member; An opening for inserting a connection terminal to the circuit board is provided in one of the openings, and the circuit board and the integrated circuit chip are located below the opening, so that the memory of the integrated circuit chip can be backed up. In addition to being able to obtain a battery with sufficient capacity for use, significantly extending backup time, and integrating the battery structure with the IC card, the battery electrode part shields the circuit board and integrated circuit chip. Therefore, we protect circuit boards and integrated circuit chips from external static electricity.
The circuit board and integrated circuit chip exposed to the surface through the opening have the effect of being shielded against static electricity because the opening is provided on a metal electrode plate. , has a simple structure and can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an IC card to which the present invention is applied, Fig. 2 is a cross-sectional structural diagram of an IC card according to an embodiment of the present invention, and Fig. 3 is a diagram for explaining the structure of the IC card. . 1... IC card body, 3... Positive electrode plate, 4...
...Negative electrode plate, 5...Solid electrolyte, 8...Circuit board,
9...LSI chip.

Claims (1)

[Claims for Utility Model Registration] Positive and negative electrode plates facing each other that cover substantially the entire IC card, an electrolytic part sandwiched between the two electrode plates, and an extension of the two electrode plates further extending from the electrolytic part. a sealing member provided in a portion sandwiched between the electrodes and sealing the electrolytic part; a circuit board mounted in a space between the extended part separated from the electrolytic part by the sealing member; an integrated circuit chip, and an opening for inserting a connection terminal to the circuit board in either of the electrode plates, and the circuit board and the integrated circuit chip are positioned below the opening. An IC characterized by
card.