Chip-card with display

FIELD: chip-cards with displays.

SUBSTANCE: chip-card 1 has processor P and controller C of display, made in form of one chip 5, which is positioned on the same substrate 4, on which display 2 is made, while substrate 4 of display with processor P of chip positioned on it or, at least, with current-conductive tracks leading to it from processor P is preferably overlapped by contact area 3, present on chip-card 1, approaching it from below.

EFFECT: increased protection of semiconductor components of chip-card from destruction.

3 cl, 2 dwg

 

The present invention relates to a smart card (the card with an embedded microchip) with display, especially to the so-called "e-wallet" in the format of a smart card having a processor for processing data and a display controller that controls playback on the display of certain data.

The chip-card of this type is known, for example, from the application DE 19631557 A1. The presence of such a chip card display allows the use of any auxiliary means to display thereon stored in the memory of the chip card information, meaning, for example, the amount of money that is in the "electronic wallet". For security reasons, the display controller made as separate from the processor chip card chip (chip), but it can also be physically stored on the same processor chip card chip in the form of logically and functionally independent unit.

However, the placement of the display controller on a single processor chip card chip is impractical because of the connection of the display with its controller, it is necessary to provide a large number of connecting wires, which in the case of a five digit seven-segment display indicators is equal to 35. Instead, the display controller is usually performed on a single crystal, which is built directly on SPLA and which is applied to the same glass or polymer substrate, which made the display. Such an arrangement it is expedient to use primarily in the case when the display has a transparent conductive tracks of indium and tin oxides (Reis)that allows you to inexpensively on the same substrate to perform the wires leading to the display controller, as well as the Reis conductive tracks.

The present invention was based on the task of further reducing the costs associated with the electrical connections between the individual components of the chip card with display.

This problem is solved in accordance with the invention with its proposed smart card with a display, the hallmarks of which are presented in the independent claim 1 of the claims. Preferred embodiments of the invention are given in the dependent claims.

In accordance with this, it is proposed to combine with the display and the processor chip card, having the functions of the display controller and the processor chip card in a single chip, i.e. on a common semiconductor substrate, and to put this chip on the same substrate on which made the display, respectively, made his contact pin.

Because of this, there is no need to provide the connecting conductors and time-consuming to manufacture contacts for soybeans is inane between a chip display controller and the processor chip, which up to the present time is always located in the chip-cards under their contact area. Proposed in the invention, the solution allows up to five to reduce the number of required connecting wires leading to the pad of the chip card. Due to the relatively large area and the exact positioning of the plots pads perform such electrical connections do not require a significant investment.

Other advantages of the invention consist in the fact that instead of two separate chips required to make only one chip. This chip and the display form a single mechanical unit, embedded in a chip card in a single compact details. Thus there is no need to embed the chip card single chip processor.

According to one of preferred embodiments of the invention, the substrate of the display overlaps with existing smart card contact area, going under her bottom, to keep the cost of performing the electrical connections between the individual components of the chip-card at the lowest possible level. When this is placed on the substrate of the display processor chip card or at least placed on the substrate of the display leading to the processor chip card contact pin placed under the contact pad of the smart card.

Below and is gaining more detail on the example of one of the variants of its possible implementation with reference to the accompanying drawings, showing:

figure 1 is a view in plan of a chip card with display and integrated substrate of the display and

figure 2 is a substrate of the display shown in figure 1, the chip card located on the substrate elements.

Figure 1 shows a chip card 1 with the display 2 and the contact pad 3, is provided through which the contact communication between the chip card 1 and the processing unit. Such a chip card can represent, for example, a map with the function "electronic wallet". The chip card can be provided and other embedded elements, such as keyboard or at least switch to activate the display, as well as the signature strip, magnetic strip, acting relief items, etc.

In the present embodiment, the display 2 is made in the form of a five digit display with seven-segment indicators. However, in principle the invention envisages displays of any type.

In marked by a dotted line box in figure 1 are enclosed inside the smart card components related to the present invention. When it comes to the substrate 4 of the display on which the formed structure and layers of the display 2, and the semiconductor substrate 5 located on the processor P of the chip card controller With display. As shown in figure 1, the substrate 4 on which splay overlaps with existing chip card 1 contact pad 3, going under her bottom.

Figure 2 is depicted in figure 1, the substrate 4 is shown separately, type in the plan. Controller With display, the processor P of chip cards and connecting them between a conductive track 7 performed together on the semiconductor substrate 5, which is in turn deposited on a substrate 4 of the display. Display 2 not shown in detail as its construction is not significant for the invention. Controller With display controls shown in figure 1 segments of the display indicators 2 through conductive paths 6. Have shown in the drawing display the total number of segments and, accordingly, the conductive tracks 6, each of which leads to one segment is equal to 35, however, to simplify the figure 2 shows not all of these conductive paths, and only some of them.

The processor P of the chip card, in turn, electrically conductive paths connected to the contact terminals 8 arranged under the contact pad 3, the chip card 1. Thus in a simple way allows electrical contact between the contact terminals 8, and the contact sections of the contact pads 3. In another not shown in the drawing version of the processor P of the chip card with the contact pins can be placed directly under the contact pad 3. The advantage of this layout SOS is the RTO is that pad encased in a rigid frame, effectively protects located underneath the semiconductor components from cracking and breaking.

1. The chip card (1) display (2)having a processor (P) for data processing and controller (C) display controlling playback on the display (2) specific data, and the processor (P) of the chip card and the controller (C) the display is made on a common semiconductor substrate (5), which is deposited on the same substrate (4)on which the display (2).

2. The chip card according to claim 1, in which the ability to communicate the substrate (4) of the display overlaps with existing chip card (1) contact area (3), coming under her bottom so that the leading from the processor (P) of the chip card to the pad (3) contact pin can be located under the contact area.

3. The chip card according to claim 1, in which the ability to communicate the substrate (4) of the display overlaps with existing chip card (1) contact area (3), coming under her bottom so that the processor (P) of the chip card (1) is located under the contact area.



 

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