JPH0844964A - Resonance label and its manufacture - Google Patents

Abstract

PURPOSE:To easily machine resonance labels with high response sensitivity in quantities at low cost. CONSTITUTION:Aluminum foil 1 is adhered to a polyester table (base) 2 with a repeelable adhesive 3. Then a polyethylene thin film 4 as a dielectric is laminated on the laminated aluminum foil 1. The laminate is punched from the side of the polyethylene thin film 4 up to the top surface of the base 2 to carry out the half-die cutting of the polyethylene thin film 4 and aluminum foil 1, a couple of spiral patterns 5A and 5B are formed, and deburring is done. The base 2 is folded to put the couple of spiral patterns 5A and 5B one over the other, and heated and pressed by a heat press, and the couple of left and right spiral patterns 5A and 5B are coupled together across the polyethylene thin film 4 to obtain the resonance label.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resonance label used for movement and identification management of people and articles and a method for manufacturing the resonance label.

[0002]

2. Description of the Related Art A transmitter / receiver for transmitting and receiving radio waves of a specific frequency and a wireless system for transmitting and receiving radio waves of a specific frequency for the management of persons entering and leaving a specific place, and the movement and identification management of goods in a physical distribution process. Various identification systems have conventionally been developed in combination with an identification card having a responsive resonant circuit. For example, in Japanese Patent Laid-Open No. 4-169995, "Resonance Tag and Method for Manufacturing the Same", a metal foil (aluminum foil) laminated on both surfaces of a dielectric film is subjected to etching treatment to form a coiled spiral pattern. A method of providing a resonance circuit is disclosed. By the way, since the resonant circuit does not have a power source or an active element, its reflected energy is mainly influenced by the Q of the circuit and the opening area of the inductance. Here, the Q of the circuit is greatly influenced by the resistance value of the inductance element in addition to the material of the dielectric material and the coil shape. Although this resistance value depends on the cross-sectional area of the conductor foil, it is difficult to increase the conductor width and decrease the resistance because there are restrictions in terms of dimensions in the above identification card. It is desirable to respond.

[0003]

However, since the above-mentioned aluminum foil as the coil-shaped conductor has its spiral pattern formed by etching, it takes a long time to process, and a thick material can be processed at a high speed. In this respect, there is a problem that mass production processing is practically difficult. In order to form a capacitance element and an inductance element to form a resonance circuit, a capacitor electrode plate is separately provided on at least one side, and this is crossed with the spiral pattern of the inductance element (metal foil). It must be connected to the inductance element via a jumper wire so as to obtain an electrical conduction state. This complicates the production of the resonance circuit and is one of the factors that increase the manufacturing cost. In view of the above problems, it is an object of the present invention to provide a resonance label having high response sensitivity that can be easily mass-produced at low cost, and a method for manufacturing the resonance label.

[0004]

Therefore, according to the present invention, an inductance element made of a spiral conductor foil and a capacitance element made of a dielectric material fixed to at least a part of the inductance element are provided, and In the resonance label having an LC resonance circuit that resonates with radio waves, the LC resonance circuit has a laminated circuit unit including the dielectric and a pair of spiral conductor foils formed on both surfaces of the dielectric. However, the pair of spiral conductor foils is formed with a pair of spiral patterns that overlap with each other when facing each other with the dielectric interposed therebetween, and the spiral pattern of the spiral conductor foil on one side is formed. And the end of the spiral pattern of the spiral-shaped conductor foil on the other side are coupled via the dielectric, and the manufacturing method thereof is
(1) A step of removably attaching the conductive foil to the mount,
(2) A step of laminating a dielectric material on a conductor foil attached to a mount, (3) A step of half-die cutting the conductor foil laminated with a dielectric material to form a pair of spiral patterns, (4) A pair of spiral patterns. A step of removing unnecessary portions of the conductor foil formed with (5) a step of opposingly polymerizing a pair of conductor foils from which unnecessary portions have been removed via a dielectric. (6) A second feature is that the process is composed of a pair of oppositely polymerized conductive foils.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an outline of a laminated structure of a resonance label according to the present invention, FIG. 2 is a plan view of a conductor foil half-die cut into a pair of spiral patterns, and FIG. 3 is a manufacturing process diagram of this embodiment, FIG. 5 is a plan view of the resonance label according to the present embodiment, and FIG.
FIG. 4 is a circuit diagram showing an electrical equivalent circuit of the resonance label according to the present embodiment.

As shown in FIGS. 1, 2 and 3, first,
An aluminum foil 1 having a thickness of 30 μm, which is a conductor foil for forming an inductance element, is attached to a polyester tape 2 having a thickness of 50 μm as a mount (process paper) with a removable adhesive 3 (A).

The polyester tape 2 on the mount has a function as a buffer in the subsequent punching process, and a function to reinforce and stabilize the punched aluminum foil 1 in removing dust. The polyester tape 2 preferably has a thickness of 50 μm or more.

Then, liquid polyethylene is applied to the surface of the aluminum foil 1 adhered to the polyester tape 2 and dried to laminate a polyethylene thin film 4 having a thickness of 10 μm as a derivative (B).

Next, from the side of the polyethylene thin film 4 which is the laminated derivative, half die cutting (punching) up to the upper surface of the polyester tape 2 is performed to cut the polyethylene thin film 4 and the aluminum foil 1 and shown in FIG. Forming a pair of spiral patterns 5A and 5B (C),
The unnecessary portion of the aluminum foil 1 is removed, that is, so-called scrap removal is performed (D). At that time, perforations T are simultaneously inserted in the boundary portion between the pair of spiral patterns 5A and 5B to form a folding line. Here, the pair of spiral patterns 5A and 5B are arranged on the left and right around the perforation T, and when folded, the end portion 6A of the spiral pattern 5A on the left side is the end portion 6B of the spiral pattern 5B on the right side. Is formed to polymerize with. Further, at the other end of the spiral patterns 5A and 5B, an electrode plate 7A having a large area for forming a capacitance element is formed.
And 7B are formed.

Next, as shown in FIG. 4, polyester tape 2
Is folded with the polyethylene thin film 4 side inward from the perforation T to be opposed and polymerized (E), and thermocompression-bonded by a heat press without leaving bubbles or gaps, and the left and right spiral patterns 5A and 5B are attached to the polyethylene thin film 4. (F). As a result, the dielectric constant of the polyethylene thin film 4 serving as a dielectric becomes constant, and a distributed capacitance composed of the spiral patterns 5A and 5B oppositely polymerized forms a circuit that does not require electrical conduction. This becomes an electrical equivalent circuit as shown in FIG.

Through the above steps, the inductance element formed by the spiral patterns 5A and 5B of the aluminum foil 1 and the electrode plates 7A and 7 of both spiral patterns 5A and 5B.
A resonance label 8 having an LC resonance circuit unit including a capacitance element formed of a polyethylene thin film 4 which is a dielectric material sandwiched between B was obtained.

The processing of the metal foil by the above-mentioned half die cutting can significantly shorten the processing time as compared with etching. That is, etching can easily process a foil having a foil thickness of about 50 μm, which has low productivity in terms of processing speed and is difficult to mass produce.

In this embodiment, the end portions 6 of both spiral patterns face-to-face polymerized via the polyethylene thin film 4 serving as a dielectric.
Since A and 6B can be used as a capacitor electrode plate, and the spiral patterns 5A and 5B also constitute capacitance elements in a distributed capacitance manner through the polyethylene thin film 4, there is no need for a separately provided capacitance element electrode. become.

Further, in the distributed capacitive coupling of the conductor foil in this embodiment, jumper lines are added to cross the spiral pattern to connect the capacitance element and the inductance element as in the prior art, or the electrical of the circuit is electrically connected. Since no coupling is required, complicated steps associated therewith can be largely omitted.

In this embodiment, the polyester tape 2 is used.
The pair of left and right spiral patterns 5A and 5B are polymerized by bending the same, but the present invention is not limited to this, and the spiral patterns 5A and 5B may be formed on separate mounts (process paper) and pasted together. You can use the one Further, among the materials forming the resonance label, the thicknesses of the conductor foil, the mount, and the dielectric are not limited to those of this embodiment, and may be any thickness suitable for a desired resonance circuit.

Next, the operation of the resonance label according to this embodiment will be described. The resonance frequency of the LC resonance circuit unit is determined by the total number of spirals of a spiral conductor foil as an inductance element and the dielectric constant and thickness of a dielectric material as a capacitance element sandwiched between a pair of conductor foils.

When the frequency of the electromagnetic wave transmitted from the transmitter / receiver matches the unique resonance frequency of the resonance label 8,
The resonance label 8 resonates with the received electromagnetic wave and emits an echo wave. This echo wave is received by the transmission / reception device, and the existence of the resonance label 8 is recognized.

In an identification card using an actual resonance label, a plurality of LC resonance circuits having different resonance frequencies are arranged on one card substrate (dielectric film) at intervals so as not to interfere with each other. , One identification card can be used for multiple purposes. For example, if the resonance frequency is f ₁ ,
f _2, the identification card provided with a resonant circuit unit of three different _{f 3,} the resonance frequency _{f 1, f 2, f 3} , (f 1 + f
₂ ), (f ₁ + f ₃ ), (f ₂ + f ₃ ) and (f ₁ +
Since the transmission frequencies related to the 7 combinations of f ₂ + f ₃ ) can be used, one card can be used for 7 places, and 2 ⁿ -1 places can be used for the general formula when used for the entrance check device of a specific card carrier. (N = number of channels at resonance frequency) can be checked. Moreover, it has been confirmed that when two LC resonance circuit units having different resonance frequencies are superposed on each other, echo waves can be obtained not only at the resonance frequencies of both units but also at an intermediate resonance frequency between them. Therefore, it is possible to use a larger number of transmission frequency channels.

It is to be noted that the gist of the present invention is that a pair of spiral patterns of a conductor foil are overlapped with each other in the same winding direction when facing each other, and one end of one spiral pattern and the end of the other spiral pattern are overlapped. The parts are punched so as to be polymerized, and can be basically manufactured by the method described in the above example, but the manufacturing process is performed by various other methods in order to streamline and simplify the process. Needless to say, can be replaced with.

[0020]

Since the present invention is configured as described above, an identification card having high response sensitivity can be mass-produced easily in an extremely short time. For this reason, the manufacturing cost can be significantly reduced (about one-third the cost of the etching method), and there is an excellent effect that it can be used as a consumable item that could not be obtained due to the high cost of the conventional method.
Further, since the waste liquid generated during the etching treatment does not come out, there is an excellent effect that the problem in the waste liquid treatment can be solved.

[0021]

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an outline of a laminated structure of an identification card according to the present invention.

FIG. 2 is a plan view of a conductor foil half-die cut into a pair of spiral patterns.

FIG. 3 is a manufacturing process diagram of the present embodiment.

FIG. 4 is a plan view of a resonance label according to this embodiment.

FIG. 5 is a circuit diagram showing an electrically equivalent circuit of the resonance label according to the present embodiment.

[Explanation of symbols]

 1 Aluminum foil (conductor foil) 2 Polyester tape (mounting board) 3 Removable adhesive 4 Polyethylene thin film (dielectric) 5A Swirl pattern (inductance element) 5B Swirl pattern (inductance element) 6A End of swirl pattern 6B Swirl pattern Edge 7A Electrode plate (capacitance element) 7B Electrode plate (capacitance element) 8 Resonance label T Perforation (fold line)

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G01V 15/00 H01F 17/00 A 4230-5E 41/04 A // B65G 43/08 F G07C 11 / 00

Claims (2)

[Claims] 1. An LC resonance circuit comprising an inductance element made of a spiral conductor foil and a capacitance element made of a dielectric material fixed to at least a part of the inductance element, the LC resonance circuit resonating with a radio wave of a specific frequency. In the resonance label described above, the LC resonance circuit has a circuit unit having a laminated structure composed of the dielectric and a pair of spiral conductor foils formed on both surfaces of the dielectric, and the pair of spiral conductor foils includes: Form a pair of spiral patterns that overlap with each other when facing each other through the dielectric, and the spiral pattern of the spiral conductor foil on one side and the spiral pattern on the other side are formed. A resonance label, wherein the ends of the spiral pattern of the strip-shaped conductor foil are coupled via the dielectric. 2. A method of manufacturing a resonance label, which comprises the following steps: (1) a step of removably attaching a conductive foil to a mount, (2) a conductive foil attached to the mount A step of stacking dielectrics, (3) a step of half-die cutting a conductor foil having dielectrics stacked thereon to form a pair of spiral patterns,
(4) A step of removing unnecessary portions of the conductor foil having a pair of spiral patterns formed thereon, (5) A step of counter-polymerizing the pair of conductor foils from which unnecessary portions are removed through a dielectric, (6) Counter-polymerization The process of joining a pair of conductor foils.