JP2004151968A - Contactless data receiver - Google Patents

Abstract

A non-contact data transmitter / receiver having a large memory capacity, a small size, a wide communication distance range, and a multi-functionality is provided.
A substrate (2) made of an insulating member, a first IC chip (3) and a second IC chip (4) arranged on one surface of the substrate (2) for controlling storage, processing and communication of data; An antenna body 5 connected to the first IC chip 3 and the second IC chip 4 and made of a conductive member; the antenna body 5 includes a plurality of circling portions 6 and connection portions 7 extending from both ends of the circulating portion 6; And one end of the circling portion 6 constituting the antenna body 5 is connected to the first IC chip 3 and the second IC chip 4 through a second insulating member 8 provided above the circulating portion 6. The other end is directly connected to the first IC chip 3 and the second IC chip 4, and the first IC chip 3 and the second IC chip 4 are connected in parallel to the antenna body 5. Contact type data receiver / transmitter 1.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a non-contact type data transmitter / receiver that externally reads / writes data and supplies power by electromagnetic waves or the like.
INDUSTRIAL APPLICABILITY The non-contact data receiver / transmitter according to the present invention is suitably used for a card, a tag, and the like on which an IC is mounted.
[0002]
[Prior art]
In recent years, such as non-contact IC tags and information recording media for use in RF-ID (Radio Frequency Identification), non-contact data reception has been made to receive information from outside using electromagnetic waves as a medium and to transmit information to the outside. A sender has been proposed.
[0003]
Conventionally, such a non-contact type data transmitter / receiver is composed of an IC chip mounted with various electronic components for storing, processing, and controlling data on a substrate made of an insulating member, and a coil-shaped device for transmitting and receiving electromagnetic waves. (For example, see Patent Document 1).
[0004]
[Patent Document 1]
JP-A-10-334203
[Problems to be solved by the invention]
However, since the conventional non-contact type data receiver / transmitter has only one IC chip, the memory capacity is small, so the data storage capacity is also small, and a large amount of data can be processed at the same time. It was difficult to backup the stored data.
Further, since the conventional non-contact data receiver / transmitter has a small memory capacity, the antenna cannot be miniaturized in order to secure a resonance frequency necessary for performing data communication using electromagnetic waves. Because of this, the area occupied by the antenna in the non-contact data receiver / transmitter is large, and it has been difficult to further reduce the size of the non-contact data receiver / transmitter.
[0006]
Further, since the conventional non-contact type data receiving / transmitting device has only one IC chip, it can be used only at a predetermined communication distance, and cannot be used outside of the predetermined communication distance. Further, the conventional non-contact type data receiver / transmitter has only one IC chip, and since the memory capacity of the IC chip is small, it has been difficult to achieve multi-functionality.
[0007]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a non-contact data receiver / transmitter having a large memory capacity, a small size, a wide communication distance range, and a multifunctional function. And
[0008]
[Means for Solving the Problems]
The object is to provide a substrate made of an insulating member, a plurality of IC chips arranged on the substrate to control data storage, processing and communication, and an antenna body connected to the plurality of IC chips and made of a conductive member Wherein the plurality of IC chips are connected in parallel via a plurality of terminals provided on the antenna body. Can be solved.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a non-contact type data transmitter / receiver according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic plan view showing a first embodiment of a contactless data receiver / transmitter according to the present invention.
1 includes a substrate 2 made of a first insulating member and two IC chips arranged on one surface of the substrate 2 for controlling data storage, processing, and communication. (Here, the first IC chip 3 and the second IC chip 4) and an antenna body 5 having both ends connected to the first IC chip 3 and the second IC chip 4 and made of a conductive member. I have. The antenna body 5 has a plurality of orbiting portions 6 and connecting portions 7 extending from both ends of the orbiting portion 6 and connected to the first IC chip 3 and the second IC chip 4. In addition, one end of the circling portion 6 constituting the antenna body 5 is connected to the first IC chip 3 and the second IC chip 4 through a second insulating member 8 provided above the circulating portion 6 and other components. The end is directly connected to the first IC chip 3 and the second IC chip 4, and the first IC chip 3 and the second IC chip 4 are connected in parallel to the antenna body 5.
[0010]
As the substrate 2, for example, a woven fabric, a nonwoven fabric, a mat, a paper made of an inorganic fiber such as a glass fiber or an organic fiber such as an alumina fiber, a polyester fiber, or a polyamide fiber, or a combination thereof, or a resin varnish impregnated therein Composite base, polyamide-based resin base, polyester-based resin base, polyolefin-based resin base, polyimide-based resin base, ethylene-vinyl alcohol copolymer-based resin base, polyvinyl alcohol-based resin base, Plastic substrates such as polyvinyl chloride-based resin substrates, polyvinylidene chloride-based resin substrates, polystyrene-based resin substrates, polycarbonate-based resin substrates, acrylonitrile-butadiene-styrene copolymer-based resin substrates, and polyethersulfone-based resin substrates Or matte treatment, corona discharge treatment Plasma treatment, ultraviolet irradiation treatment, electron beam irradiation treatment, flame plasma treatment and ozone treatment, or subjected to surface treatment of various adhesion-facilitating treatment, may be selected from known ones such as.
[0011]
The antenna body 5 constituting the non-contact type data receiving / transmitting body 1 is connected to the first IC chip 3 and the second IC chip 4 extending from both ends of the circling section 6 in addition to the plurality of circulating sections 6. A connection section 7 is provided. The distal end of the connection part 7 forms a connection terminal that branches into two and is connected to the first IC chip 3 and the second IC chip 4.
[0012]
As a method of forming the antenna body 5 (circular portion 6 and connection portion 7) made of a conductive member, a known manufacturing method can be used. For example, a method of screen-printing and fixing a solvent-evaporating, thermosetting, or light-curing conductive paste by drying and fixing, a method of attaching a coated or uncoated metal wire, an etching method, a method of attaching a metal foil, metal , A method of transferring a metal deposition film, a method of forming a conductive polymer film, and the like.
Among them, the method of screen-printing and fixing the conductive paste by drying does not require a reduced-pressure atmosphere, and easily places the antenna body 5 having an arbitrary line width at a desired position on the substrate 2 in a normal atmosphere. It is preferable because it can be formed.
Further, in FIG. 1, the connecting portion 7 is arranged outside the orbital portion 6, but may be arranged inside as a matter of course. The connecting portion 7 is arranged inside the circling portion 6, and the first IC chip 3 and the second IC chip 4 are connected to the inside of the circling portion 6 such that the first IC chip 3 and the second IC chip 4 are connected to the ends of the connecting portion 7. If the chip 3 and the second IC chip 4 are arranged, the space on the substrate 2 can be effectively used. In addition, since it is not necessary to provide a space for disposing the first IC chip 3 and the second IC chip 4 on the substrate 2 outside the circling portion 6, the non-contact type data receiver / transmitter 1 is more easily provided. The size can be reduced.
[0013]
The formation of the second insulating member 8 can be performed by a known method such as printing of an insulating paste, pasting of an insulating film through an adhesive, and pasting of an insulating tape. The screen printing used is most preferred. In the formation of the second insulating member 8 by screen printing, a composition comprising insulating particles and a binder is used as a coating agent, and examples of the insulating particles include silica, alumina, and talc. The dielectric constant of the second insulating member 8 can be finely adjusted by appropriately selecting the material of the insulating particles and the mixing ratio thereof. However, in the case where the insulating property is ensured even without the insulating particles, the second insulating member 8 may be formed by using a composition consisting only of the binder.
[0014]
Further, in forming the second insulating member 8, an insulating ink may be used instead of the composition. As the insulating ink, any known material such as a penetration drying type, a solvent evaporation type, a thermosetting type, and a photo-setting type can be used. Further, it is more preferable to include a photocurable resin in the binder constituting the insulating ink because the curing time can be shortened and the working efficiency can be improved. Solvent-free (excluding solvent) insulating ink is preferable because it can prevent the occurrence of microcracks that occur when the solvent evaporates.
[0015]
In the non-contact type data receiver / transmitter 1, the first IC chip 3 and the second IC chip 4 used for the non-contact type data receiver / transmitter capable of receiving and transmitting information from the outside using an electromagnetic wave as a medium are as follows. All can be used. The first IC chip 3 and the second IC chip 4 may have the same function and the same memory capacity or may have different functions.
[0016]
As described above, in the non-contact type data receiver / transmitter 1, by providing two IC chips (the first IC chip 3 and the second IC chip 4), the apparent value is larger than that of the conventional non-contact type data receiver / transmitter. The upper memory capacity can be doubled or more. As a result, a large amount of data can be processed simultaneously. In addition, data stored in one IC chip (for example, the first IC chip 3) can be backed up by the other IC chip (for example, the second IC chip 4), so that one of the IC chips is damaged, Or, even if a failure occurs, no data is lost.
[0017]
Furthermore, if the first IC chip 3 and the second IC chip 4 having different functions are used, two or more different data can be processed at the same time. Can be multifunctional.
As a specific example of multi-functionalization, for example, if the first IC chip 3 and the second IC chip 4 having different communication distances are used, both the proximity and proximity types can be used. The contactless data receiver / transmitter 1 having a wide range can be obtained. Further, by providing different data call protection means in each of the first IC chip 3 and the second IC chip 4, it is difficult to forge or call data by another person, and the data is more strictly protected. be able to. As a result, data can be transmitted and received independently to two or more different communication partners without affecting other party's data. That is, the first IC chip 3 transmits and receives data to and from the communication partner A, and the second IC chip 4 transmits and receives data to and from the communication partner B. In addition, the first IC chip 3 and the second IC chip 4 can coexist as communication means with different communication partners. Therefore, in order to perform data transmission / reception without contact with two or more different communication partners, one non-contact data receiver / transmitter does not have a contactless data receiver / transmitter corresponding to each partner. It can also be shared.
[0018]
FIG. 2 is a circuit diagram showing an equivalent circuit of a resonance circuit in the non-contact type data receiver / transmitter 1 shown in FIG.
In FIG. 2, reference numeral 11 denotes an equivalent circuit of the antenna body 5, 12 denotes a circuit portion of the first IC chip 3, and 13 denotes a circuit portion of the second IC chip 4. Further, in the equivalent circuit 11 of the antenna 5, reference numeral 14 is an equivalent capacitance _C A, 15 of the antenna 5 is equivalent resistance _R A, 16 is an equivalent inductance _{L A.} Further, reference numeral 17 denotes an equivalent capacitance C ₁ of the first IC chip 3, and reference numeral 18 denotes an equivalent capacitance C ₂ of the second IC chip 4.
When data is transmitted and received by the non-contact data receiver / transmitter 1 using an electromagnetic wave, a resonance circuit that matches the frequency of the electromagnetic wave is required in the non-contact data receiver / transmitter 1. In the non-contact type data transmitter / receiver 1, the resonance circuit includes the antenna 5 as an inductance element, and the first IC chip 3 and the second IC chip 4 as capacitance elements. The resonance frequency f of this resonance circuit is generally represented by the following equation (1).
_{f = 1 / {2π [L} A (C A + C 1 + C 2)] 1/2} (1)
[0019]
From the equation (1), the resonance frequency f of the non-contact type data reception and transmission body 1, the equivalent inductance L _A of the antenna 5, the equivalent capacitance of the equivalent capacitor C _A and the first IC chip 3 of the antenna 5 C ₁ and the product of the equivalent capacitance C2 of the _second IC chip 4. Therefore, by providing the first IC chip 3 and the second IC chip 4 in the non-contact data receiver / transmitter 1, the equivalent capacitance on the equivalent circuit of the resonance circuit in the non-contact data receiver / transmitter 1 increases. the contactless data reception and transmission body 1 is required to match the resonance point of the resonance frequency, it is possible to reduce the value of the equivalent inductance L _a of the antenna 5. As a result, the size of the antenna body 5 can be reduced, so that the size of the non-contact data transmitter / receiver 1 can be further reduced.
[0020]
In this embodiment, the first IC chip 3, the second IC chip 4, and the antenna 5 are arranged on one surface of the substrate 2. The transmitting body is not limited to this, and one or two of the first IC chip 3, the second IC chip 4, and the antenna body 5 may be arranged on the other surface of the substrate 2.
Further, in this embodiment, the non-contact type data receiver / transmitter 1 in which the two IC chips (the first IC chip 3 and the second IC chip 4) are connected in parallel to the antenna body 5 is shown. The contactless data receiver / transmitter of the present invention is not limited to this, and three or more IC chips may be connected in parallel to the antenna.
[0021]
【The invention's effect】
As described above, the non-contact type data transmitter / receiver of the present invention includes a substrate formed of an insulating member, a plurality of IC chips disposed on the substrate, for controlling data storage, processing, and communication. A non-contact data receiver / transmitter, comprising: an antenna body made of a conductive member connected to a plurality of IC chips, wherein the plurality of IC chips are connected in parallel via a plurality of terminals provided on the antenna body Therefore, the memory capacity can be made larger than that of the conventional non-contact data transmitter / receiver. As a result, a large amount of data can be processed at the same time, and the data stored in one IC chip can be backed up by another IC chip. No data loss. In addition, when a plurality of IC chips having different functions are used, a plurality of different data can be processed at the same time, so that the contactless data receiver / transmitter can have multiple functions. Specifically, if a plurality of IC chips having different communication distances are used, a non-contact data receiver / transmitter having a wide communication distance range can be obtained. Furthermore, since the value of the equivalent inductance of the antenna can be reduced, the size of the antenna can be reduced, and the size of the non-contact data transmitter / receiver can be further reduced.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing an example of a non-contact data transmitter / receiver according to the present invention.
FIG. 2 is a circuit diagram showing an equivalent circuit of a resonance circuit in the non-contact type data receiver / transmitter 1 shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Non-contact type data transmission / reception body, 2 ... Substrate, 3 ... 1st IC chip, 4 ... 2nd IC chip, 5 ... Antenna body, 6 ... Circuit Part, 7 connection part, 8 second insulation member

Claims (1)

A substrate formed of an insulating member, a plurality of IC chips disposed on the substrate to control data storage, processing, and communication; and an antenna body connected to the plurality of IC chips and formed of a conductive member. A contactless data receiver and transmitter,
A non-contact type data receiving / transmitting body, wherein the plurality of IC chips are connected in parallel via a plurality of terminals provided on the antenna body.

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