CN111492536A - Portable radio communication device and information identification device using the same - Google Patents
Portable radio communication device and information identification device using the same Download PDFInfo
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- CN111492536A CN111492536A CN201880082795.1A CN201880082795A CN111492536A CN 111492536 A CN111492536 A CN 111492536A CN 201880082795 A CN201880082795 A CN 201880082795A CN 111492536 A CN111492536 A CN 111492536A
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/59—Responders; Transponders
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
- H04B5/48—Transceivers
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Details Of Aerials (AREA)
- Near-Field Transmission Systems (AREA)
- Support Of Aerials (AREA)
Abstract
A portable radio communication device comprising an insulating base material, a coil antenna arranged in a loop on the insulating base material, and an IC chip electrically connected to the coil antenna, wherein the coil antenna comprises: a plurality of first electrodes disposed on a first surface side of the insulating base material and having a first portion and a second portion; a plurality of second electrodes disposed on the second surface side of the insulating base material and having a third portion and a fourth portion; and a plurality of through-electrodes disposed within the insulating substrate, wherein a first portion of one of the plurality of first electrodes is connected to a fourth portion of one of the plurality of second electrodes using one of the plurality of through-electrodes, and a second portion of one of the plurality of first electrodes is connected to a third portion of another one of the plurality of second electrodes using another one of the plurality of through-electrodes.
Description
Technical Field
One embodiment of the present invention relates to a portable wireless communication device and an information recognition device using the same.
Background
In recent years, information transmission methods using a short-distance communication technique of a non-contact method have rapidly spread and are used in various fields. In short-range communication of a non-contact system, a portable wireless communication device having a basic structure of a semiconductor element with an integrated circuit mounted thereon and an antenna is used. An Integrated Circuit (IC) chip including various elements without a power supply is driven by inducing power at an antenna by electromagnetic induction or radio waves generated by a reader/writer. The IC chip performs various processes such as reading information embedded in the IC chip, writing information to the IC chip, generating and transmitting instructions, receiving instructions from a reader/writer, and the like. Such a wireless communication device is generally called RFID (Radio frequency identification), but is given various names according to its shape and use. For example, it is also called an IC tag, a wireless tag, an RF tag, an IC card, or the like.
Due to the diversity of stored information and the excellent portability of the wireless communication device itself, the wireless communication device is widely used as means for merchandise management and personal identification, security countermeasures, electronic tickets, game cards, commercial transaction approval, and the like.
In the case of IC tags, there is a case where reading is performed by a reader/writer in a state where a plurality of IC tags are stacked. At this time, since the respective IC tags interfere with each other, there is a case where a resonance frequency that maximizes an electromotive force applied to the IC tags is varied. In order to suppress the change in the resonance frequency, for example, patent document 1 discloses a technique of providing a chip coil (chip coil) in a non-contact information medium. Patent document 2 discloses a technique of providing a plurality of coils smaller than the main antenna without using a chip coil.
[ Prior art documents ]
[ patent document ]
Patent document 1: japanese laid-open patent publication No. 2006-67479
Patent document 2: japanese laid-open patent publication No. 2009-147560
Disclosure of Invention
(problems to be solved by the invention)
On the other hand, in the case of patent document 1, since the sheet type coil needs to be provided, there is a case where the quality of the coil varies accordingly, or there is a case where the manufacturing cost of the IC tag increases. In addition, in the case of patent document 2, it is difficult to increase the tact time of antenna manufacturing, and therefore, it is necessary to provide a plurality of manufacturing apparatuses.
In view of the above-described problems, it is an object of one embodiment of the present invention to provide a portable wireless communication device that can be mass-produced at low cost and has small quality variations.
(means for solving the problems)
According to one embodiment of the present invention, there is provided a portable radio communication device including: an insulating base material having a first surface and a second surface opposite to the first surface; a coil antenna disposed in a loop on an insulating base material; and an IC chip electrically connected to the coil antenna, the coil antenna including: a plurality of first electrodes disposed on a first surface side of the insulating base material and having a first portion and a second portion; a plurality of second electrodes disposed on the second surface side of the insulating base material and having a third portion and a fourth portion; and a plurality of through-electrodes disposed within the insulating substrate, wherein a first portion of one of the plurality of first electrodes is connected to a fourth portion of one of the plurality of second electrodes using one of the plurality of through-electrodes, and a second portion of one of the plurality of first electrodes is connected to a third portion of another one of the plurality of second electrodes using another one of the plurality of through-electrodes.
In the above-described portable radio communication device, when one of the plurality of first electrodes is used and the other is used, at least one of the plurality of first electrodes may have a meandering shape.
According to one embodiment of the present invention, there is provided a portable radio communication device including: a coil antenna configured in a ring shape; and an IC chip electrically connected to the coil antenna, the coil antenna having a spiral shape in a winding direction.
In the above-described portable radio communication device, the coil antenna may include a loop-shaped first antenna and a loop-shaped second antenna disposed inside the first antenna in a plan view, and the first antenna and the second antenna may be partially connected.
In the above-described portable radio communication device, the coil antenna may include a loop-shaped first antenna and a loop-shaped second antenna disposed so as to overlap with the first antenna, and the first antenna and the second antenna may be locally connected.
According to one embodiment of the present invention, there is provided a portable radio communication device including: an insulating base material having a first surface and a second surface opposite to the first surface; a coil antenna disposed in a loop on an insulating base material; and an IC chip electrically connected to the coil antenna, wherein the coil antenna is disposed on the first surface or the second surface of the insulating base material and includes a plurality of insulating layers, a plurality of electrodes, and a plurality of through-electrodes, the plurality of through-electrodes being disposed on the plurality of insulating layers and connecting the plurality of electrodes, and the coil antenna has a spiral shape when viewed in cross section.
The portable radio communication device may include a shield disposed to overlap the coil antenna.
In the above-described portable radio communication device, the coil antenna may have a circular shape in a plan view.
In the above-described portable radio communication device, the coil antenna may have a rectangular shape in a plan view.
According to an embodiment of the present invention, there is provided an information identification device including one or more of the above-described portable wireless communication devices and a reader/writer.
(Effect of the invention)
According to one embodiment of the present invention, a portable wireless communication device with small quality variation, which can be mass-produced at low cost, can be provided.
Drawings
Fig. 1 is a perspective view of an information recognition apparatus according to an embodiment of the present invention.
Fig. 2 is a top view and a cross-sectional view of a portable wireless communications device according to an embodiment of the present invention.
Fig. 3 is a perspective view of an antenna unit of a portable radio communication device according to an embodiment of the present invention.
Fig. 4 is a block diagram of a portable wireless communication apparatus and a reader/writer according to an embodiment of the present invention.
Fig. 5 is a sectional view showing a driving state of the portable wireless communication apparatus and the reader/writer according to one embodiment of the present invention.
Fig. 6 is a schematic diagram showing magnetic lines of force in a portable wireless communication apparatus according to an embodiment of the present invention.
Fig. 7 is a sectional view showing a driving state of the portable wireless communication apparatus and the reader/writer according to one embodiment of the present invention.
Fig. 8 is a perspective view showing a method of manufacturing an antenna unit of a portable radio communication device according to an embodiment of the present invention.
Fig. 9 is a perspective view showing a method of manufacturing an antenna unit of a portable radio communication device according to an embodiment of the present invention.
Fig. 10 is a perspective view showing a method of manufacturing an antenna unit of a portable radio communication device according to an embodiment of the present invention.
Fig. 11 is a perspective view showing a method of manufacturing an antenna unit of a portable radio communication device according to an embodiment of the present invention.
Fig. 12 is a top view of a portable wireless communication device according to an embodiment of the present invention.
Fig. 13 is a top view of a portable wireless communication device according to an embodiment of the present invention.
Fig. 14 is a top view and a cross-sectional view of a portable wireless communications device according to an embodiment of the present invention.
Fig. 15 is a perspective view of a portable radio communication device according to an embodiment of the present invention.
Fig. 16 is a cross-sectional view of an antenna unit of a portable radio communication device according to an embodiment of the present invention.
Fig. 17 is a specific example of a portable radio communication device according to an embodiment of the present invention.
Fig. 18 is a top view of a portable radio communication device according to an embodiment of the present invention.
Fig. 19 is a top view of a portable radio communication device and a top view of a shield according to an embodiment of the present invention.
Fig. 20 is a cross-sectional view of a portable wireless communication device according to an embodiment of the present invention.
Fig. 21 is a sectional view showing a driving state of the portable wireless communication apparatus and the reader/writer according to one embodiment of the present invention.
Fig. 22 is a top view of a portable radio communication device according to an embodiment of the present invention.
Fig. 23 is a sectional view showing a driving state of a conventional portable wireless communication apparatus and a reader/writer.
Detailed Description
Hereinafter, embodiments of the invention disclosed in the present application will be described with reference to the drawings. However, the present invention can be carried out in various ways within a range not departing from the gist thereof, and the present invention should not be construed as being limited to the description of the embodiments illustrated below.
In the drawings referred to in the present embodiment, the same or similar portions or portions having the same function may be denoted by the same reference numerals or similar reference numerals (only numerals of-1, 2, and the like are denoted by the following numerals), and redundant description thereof may be omitted. For convenience of explanation, the dimensional ratios of the drawings may be different from the actual ratios or a part of the components may be omitted from the drawings.
In the detailed description of the present invention, "at … …" and "at … …" when specifying the positional relationship between a certain component and another component include not only the case where the component is located directly above or below the certain component but also the case where another component is further interposed between the two components unless otherwise specified.
In addition, in this specification, terms called "conductive layer", "electrode", and "wiring" have the same meaning, and may be replaced as appropriate.
< first embodiment >
A portable wireless communication device (hereinafter, referred to as an IC tag) and an information identification device including an IC tag (tag) according to an embodiment of the present invention will be described below.
Fig. 1 is a schematic diagram of an information recognition apparatus 10. The information identification device 10 includes an IC tag 100 and a reader/writer 300.
(1-1, constitution of IC tag)
As shown in fig. 1, the IC tag 100 includes an IC chip 110, a coil antenna (coil antenna)130, a support portion 140, and a base 145. The IC chip 110 and the coil antenna 130 are disposed on the substrate 145. The IC chip 110 and the coil antenna 130 are electrically connected locally.
The IC chip 110 is configured to generate a signal in accordance with a command from a reader/writer 300 (described below). The signal is transmitted to the reader/writer 300 through the coil antenna 130.
The support portion 140 has a function of supporting the IC chip 110, the coil antenna 130, and the substrate 145. The support portion 140 is made of polyethylene terephthalate (PET), polyvinyl chloride (PVC), paper, or the like. The thickness of the support 140 is not particularly limited, but may be appropriately selected from several hundreds of μm to several cm according to the purpose.
(1-2, constitution of antenna section)
Fig. 2 is a sectional view between a top view of the IC tag 100 and a1-a2 of the coil antenna 130. Fig. 3 is a perspective view of the coil antenna 130. The coil antenna 130 is an electromagnetic induction type antenna, and is arranged in a ring shape. The coil antenna 130 has a circular shape in plan view. An electromotive force (voltage) having a magnitude corresponding to a change in magnetic flux density passing through the region surrounded by the coil antenna 130 is generated in the coil antenna 130. The electromotive force is applied to the IC chip 110 electrically connected to the coil antenna 130 to drive the IC chip 110. The coil antenna 130 is configured to resonate in a frequency band of, for example, a short wave (HF) or a very high frequency (UHF). In particular, the short wave corresponds to the band of 13.56 MHz. In addition, the ultrahigh frequency corresponds to a frequency band of 860-960 MHz.
As shown in fig. 2(B) and 3, the coil antenna includes an electrode 133, an electrode 137, and a through electrode 135. The electrode 133 and the electrode 137 are electrically connected by the through electrode 135. In addition, the electrode 133 is sometimes referred to as a first electrode, and the electrode 137 is sometimes referred to as a second electrode.
The substrate 145 is a plate-like member having a first surface 145A and a second surface 145B. The substrate 145 is made of a high-resistance insulating material. For example, a glass/epoxy substrate is used for the base material 145. The substrate 145 may be made of a resin material such as an acrylic resin or a polyethylene terephthalate resin, and is not limited to a glass/epoxy resin, and may be a paper phenol resin substrate in which a paper substrate is cured by containing a phenol resin.
Further, as the substrate 145, a quartz glass substrate, a soda glass substrate, a borosilicate glass substrate, an alkali-free glass substrate, a sapphire substrate, a silicon carbide substrate, or alumina (Al) can be used2O3) Substrate, aluminum nitride (AlN) substrate, zirconium oxide (ZrO)2) Inorganic materials such as substrates.
A plurality of electrodes 133 are disposed on the upper surface (first surface 145A) side of the substrate 145. For example, copper may be used for the electrode 133.
The electrode 133 may be made of a material having a low resistivity, such as aluminum, silver, or gold, and is not limited to copper. In addition, the electrode 133 may include a conductor having magnetism, such as iron, nickel, cobalt, ferrite, or the like. In addition, the conductor having magnetism may be a simple substance or an alloy. In addition, the electrode 133 may contain boron in a conductor having magnetic properties. The electrode 133 may be made of a shape memory alloy such as a titanium-nickel alloy, or may be made of stainless steel, but is not limited to a magnetic material.
A plurality of electrodes 137 are disposed on the lower surface (second surface 145B) side of the base 145. The electrode 137 may use the same material as the electrode 133.
The base material 145 is provided with a plurality of through electrodes 135. Copper may be used for the through electrode 135. Further, the through electrode 135 may use a material containing gold, silver, copper, nickel, or tin without being limited to copper.
As shown in fig. 2 (a), 2(B), and 3, the plurality of electrodes 133 are all arranged in a radial pattern. Each of the plurality of electrodes 137 is disposed to be inclined at a predetermined angle with respect to the disposition direction of the electrode 133. The electrode 133 has a portion 133A (also referred to as a first portion) at one end and a portion 133B (also referred to as a second portion) at the other end. Likewise, the second electrode 137 has a portion 137A (also referred to as a third portion) at one end and a portion 137B (also referred to as a fourth portion) at the other end. At this time, the portion 133A of the electrode 133 is connected to the portion 137B of the electrode 137-1 of the plurality of electrodes 137 by using the through-electrode 135-1 of the plurality of through-electrodes 135. Similarly, the portion 133B of the electrode 133 is connected to the portion 137A of the electrode 137-2 of the plurality of electrodes 137 by using the through-electrode 135-2 of the plurality of through-electrodes 135. The above-described connection is repeated for the other electrode 133, the other through-electrode 135, and the other electrode 137. Thus, the coil antenna 130 is configured as one connected wire (specifically, as one antenna connected as one stroke). In addition, the coil antenna 130 may have a spiral shape as a whole.
(1-3, constitution of IC chip)
Next, fig. 4 (a) shows an example of the configuration of the IC chip 110.
The IC chip 110 may have a main configuration including a voltage limiting circuit 111, a rectifier circuit 113, a demodulation circuit 115, a modulation circuit 117, a control circuit 119, a memory portion 121, a resistor 123, and the like. Further, the IC chip 110 may include a capacitance for resonance frequency adjustment.
The voltage limiting circuit 111 has a function of protecting the IC chip 110 from the input voltage in the case where an excessive voltage is induced in the coil antenna 130. An unnecessary part of the current generated in the case where an excessive voltage is induced is converted into heat using the resistor 123 and is discharged to the outside.
The rectifying circuit 113 has a function of converting an alternating current induced in the coil antenna 130 into a direct current. The power supply voltage that is converted into a direct current by the rectifier circuit 113 is supplied to all circuits constituting the IC tag 100.
The demodulation circuit 115 has a function of converting information (signal) superimposed on a carrier wave input from the reader/writer 300 into a signal sequence of 1 or 0.
The control circuit 119 has a function of controlling transmission/reception between the reader/writer 300, interpretation of instructions, reading of information from the storage portion 121, writing to the storage portion 121, and the like. The control circuit 119 is constituted by various logic circuits. The control circuit 119 may be a CPU (Central Processing Unit) or the like.
In addition, the control circuit 119 generates a response to an instruction received from the reader/writer 300, and passes the data to the modulation circuit 117. The modulation circuit 117 modulates a carrier wave based on the transmitted data, and generates a transmission signal. The generated signal is transmitted as a carrier from the coil antenna 130.
The storage unit 121 includes a storage element for storing data. The storage unit 121 stores unique information and various kinds of rewritable information.
(1-4, constitution of reader/writer)
Fig. 4 (B) shows an example of the configuration of the reader/writer 300. The reader/writer 300 includes a control circuit 310, a storage portion 313, a modulation circuit 320, a transmission circuit 330, an antenna 340, a reception circuit 350, a demodulation circuit 360, an oscillation circuit 370, and the like.
The control circuit 310 serves to control the entire reader/writer 300, and interprets received data, instructions, writes data to the storage section 313, reads data from the storage section 313, generates a response matching the received instructions, and the like.
The modulation circuit 320 modulates the command and data transmitted from the control circuit 310 by superimposing them on the carrier wave generated by the oscillation circuit 370. The modulated carrier is transferred to the transmission circuit 330, and the signal is amplified, attenuated at an unnecessary frequency, and the like, and only a frequency to be transmitted is extracted. The thus processed signal is transmitted to the IC tag 100 through the antenna 340.
The receiving circuit 350 has a function of receiving a carrier wave transmitted from the IC tag 100 and received by the antenna 340. The receiving circuit 350 removes noise included in the carrier wave and amplifies a necessary signal. The amplified signal is transmitted to the demodulation circuit 360 and demodulated into necessary commands and data.
The oscillation circuit 370 has a function of generating a carrier wave necessary for communication. As the carrier wave, for example, a high frequency of 13.56MHz is generated.
(1-5, operation of information recognition device 10)
Next, the operation of the information recognition apparatus 10 will be described. Fig. 5 is a cross-sectional view illustrating an information identification method of the IC tag 100 when the reader/writer 300 is driven.
As shown in fig. 5, the reader/writer 300 is first driven. When the reader/writer 300 is driven, the carrier wave 380 is transmitted from the reader/writer 300 to the coil antenna 130 of the IC tag 100. At this time, magnetic lines of force M130 are generated inside the loop of the coil antenna 130. Electromagnetic induction is generated due to the magnetic field lines M130, and the induced electromotive force is supplied to the IC chip 110. Thereby, the IC chip 110 is activated to enable transmission/reception with the reader/writer 300.
At this time, magnetic lines of force M131 are generated in the coil antenna 130 due to the current flowing through the coil antenna 130. Fig. 6 is a schematic diagram showing magnetic lines of force in the coil antenna 130. In fig. 6, since the coil antenna 130 has the above-described shape, the generated magnetic lines of force M131 stay inside the coil antenna 130.
Fig. 7 is a sectional view for explaining an information identification method of the IC tag 100 when the reader/writer 300 is driven in a state where a plurality of IC tags 100 are stacked. As a comparative example, fig. 23 shows an example of a conventional stacked general IC tag 99. When general IC tags 99 are stacked as shown in fig. 23, mutual interference (specifically, mutual inductance change) occurs due to a magnetic field M99 generated by the IC tags 99, and the resonance frequency may change. In this case, since no electromotive force is generated in the IC tag 99, information of the IC tag 99 may not be read.
On the other hand, in the case of the present embodiment, as shown in fig. 6, since the magnetic lines of force M131 stay inside the coil antenna, mutual interference is suppressed even in the case where one IC tag is stacked on top of another IC tag 100. This suppresses a change in the resonance frequency of the IC tag 100, and the IC tag 100 can be read even when a plurality of IC tags 100 are stacked.
(1-6, method for manufacturing coil antenna)
Next, a method of manufacturing the coil antenna 130 will be described with reference to fig. 8 to 11.
First, as shown in fig. 8, a through hole 147 is formed in the substrate 145.
The substrate 145 may use a high resistance material. For example, a resin material such as glass/epoxy resin can be used as the substrate 145.
The through hole 147 is formed by machining using a drill or the like with respect to the base material 145. The diameter of the through hole 147 is not particularly limited, but may be set to 10 μm or more and 1000 μm or less as appropriate.
Further, the through hole 147 may be formed by a laser irradiation method (may be referred to as a laser ablation method). The laser may be excimer laser, neodymium: YAG laser (Nd: YAG), etc. For example, when xenon chloride is used as the excimer laser, light having a wavelength of 308nm is irradiated. When a silicon substrate or a glass substrate is used, the through hole 147 may be formed by photolithography and etching.
Next, the through-electrode 135 is formed in the through-hole 147 as shown in fig. 9. Copper may be used for the through electrode 135. The through electrode 135 may be formed by an electroplating method or an electroless plating method. For example, when the through-electrode 135 is formed using copper, a thin film of copper is formed on the sidewall of the through-hole 147 by a sputtering method. Next, a copper film is formed by an electroplating method using the copper thin film as a seed layer. Finally, the copper films formed on the first surface 145A and the second surface 145B of the base material 145 are filled with the through-electrodes 135 by removing the copper on the first surface 145A and the second surface 145B of the base material 145 by a Chemical Mechanical Polishing (CMP) method.
Next, as shown in fig. 10, the electrode 133 is formed on the first surface 145A side of the base material 145. Copper may be used for the electrode 133. The electrode 133 is formed by, for example, a plating method. In the case where the electrode 133 is formed by a plating method, for example, the following method can be used. First, a thin film (seed layer) of copper is formed by sputtering. Next, a resist film is formed on the seed layer, and then the resist film is processed into a predetermined shape by photolithography or the like. Next, an electrode 133 is formed on the exposed seed layer. As the electrode 133, a copper film can be formed by an electroplating method. Finally, the resist film and the seed layer under the resist film are removed.
The electrode 133 may be formed by a printing method, sputtering, a CVD method, a coating method, or the like, without being limited to the plating method. At this time, the electrode 133 may be processed into a predetermined shape by photolithography and etching.
Next, as shown in fig. 11, an electrode 137 is formed on the second surface 145B of the substrate 145. The electrode 137 can be formed by the same material and method as the electrode 133.
The coil antenna 130 is manufactured by the above method. By using this embodiment mode, an IC tag that can be read even if a plurality of IC tags are stacked can be provided without using a chip inductor. Further, since variations in performance depending on the chip inductor are suppressed without using the chip inductor, an IC tag having excellent quality can be provided by using the present embodiment. Further, since the plurality of first electrodes, the plurality of second electrodes, and the plurality of through electrodes are formed at once by the above-described manufacturing method, the tact time of manufacturing the coil antenna can be further improved than when the coil antenna is manufactured one by one using a winding machine or the like. In the case of the present embodiment, the manufacturing can be performed by using existing equipment. Therefore, compared to a winding machine used for manufacturing a coil antenna, it is not necessary to newly provide equipment. In addition, the manufacturing apparatus may not necessarily have high functionality. That is, the coil antenna can be manufactured using a general electronic component manufacturing apparatus.
Further, by using the above-described manufacturing method, the coil antenna 130 can be controlled by the thickness of the base material 145. That is, the coil antenna 130 can be further reduced by making the thickness of the base material 145 thin. Therefore, the coil antenna 130 is reduced in size, and the IC tag can be reduced in size and thickness.
< second embodiment >
In this embodiment, a description will be given of a portable radio communication device having a coil antenna different in form from that of the first embodiment.
Fig. 12 is a plan view of the IC tag 100-1. In fig. 12, the electrode 137 and the through electrode 135 are not shown and omitted in order to clearly see the electrode 133-1 of the coil antenna 130-1 of the IC tag 100-1, but the first electrode 133-1, the electrode 137, and the through electrode 135 are connected to form one wiring as a whole in the same manner as in the first embodiment.
As shown in fig. 12, the electrode 133-1 includes an electrode 133-1-1 disposed on the outer side and an electrode 133-1-2 disposed on the inner side. In this case, the coil antenna 130-1 includes a loop antenna (sometimes referred to as a first antenna) formed using the electrode 133-1-1 and a loop antenna (sometimes referred to as a second antenna) formed using the electrode 133-1-2 and disposed inside the first antenna in a plan view. The first antenna and the second antenna are locally electrically connected. Since the coil antenna 130-1 includes the electrode 133-1-1 and the electrode 133-1-2 disposed inside, the number of turns of the coil antenna as a whole can be increased. At this time, the number of turns N of the coil, the magnetic flux Φ passing through the coil, and the time t have the relationship of formula 1. That is, the number of turns of the coil can be increased, and therefore, the induced electromotive force generated in the coil antenna 130-1 can be increased. Thus, the sensitivity of the IC tag 100-1 to the reader/writer 300 is improved.
[ formula 1]
V ═ N × Δ Φ/Δ t (formula 1)
Fig. 13 is a plan view of the IC tag 100-2. In fig. 13, the electrode 137 and the through electrode 135 are not illustrated and omitted in order to clearly see the electrode 133-2 in the coil antenna 130-2 of the IC tag 100-2. As shown in fig. 13, the electrode 133-2 has a meandering shape. In addition, the electrode 137 may have a meandering shape in the same manner. This can increase the capacitance between the electrodes in at least one of the electrode 133-2 and the electrode 137.
At this time, the inductance L and the capacitance C required for the specific resonance frequency f (for example, 13.56MHz) have the relationship shown in formula 2, the inductance L can be reduced because the capacitance of the IC tag 100-2 can be increased based on formula 2.
[ formula 2]
f 1/(2 pi √ L C) (equation 2)
Further, the inductance value L, the sectional area S of the coil, the number of turns N of the coil antenna, and the length l of the coil have the relationship of formula 3 based on the above description, the inductance value L can be reduced, and therefore, the number of turns of the coil antenna 130-2 can be reduced.
[ formula 3]
L＝μ*N2'S'/l (equation 3)
As described above, the present embodiment can reduce the manufacturing accuracy of the coil antenna. Thus, the IC tag including the coil antenna can be manufactured using a low-specification manufacturing apparatus, and manufacturing cost can be reduced.
< third embodiment >
In this embodiment, a description will be given of a mobile radio communication device including a coil antenna having a different form from the first and second embodiments.
Fig. 14 is a sectional view between a top view of the IC tag 100-3 and a1-a2 of the coil antenna 130-3. In fig. 14 (a), the IC chip 110 is electrically connected to the coil antenna 130-3. The coil antenna 130-3 is configured in a ring shape.
As shown in fig. 14 (B), the coil antenna 130-3 includes, on the first surface 145A of the base 145, a plurality of electrodes 151 (an electrode 151-1, an electrode 151-2, an electrode 151-3, an electrode 151-4, an electrode 151-5, an electrode 151-6), a plurality of insulating layers 153 (an insulating layer 153-1, an insulating layer 153-2, an insulating layer 153-3, an insulating layer 153-4, an insulating layer 153-5, an insulating layer 153-6), and a plurality of through electrodes 155 (a through electrode 155-1, a through electrode 155-2, a through electrode 155-3, a through electrode 155-4, a through electrode 155-5, a through electrode 155-6) in addition to the plurality of electrodes 133, on a1-a 2.
At this time, the electrode 151-1 is disposed on the first surface 145A of the substrate 145. The insulating layer 153-1 is disposed on the substrate 145 and the electrode 151-1. The electrode 151-2 is disposed on the insulating layer 153-1. The insulating layer 153-2 is disposed on the insulating layer 153-1 and the electrode 151-2. The electrode 151-3 is disposed on the insulating layer 153-2. The insulating layer 153-3 is disposed on the insulating layer 153-2 and the electrode 151-3. The electrode 151-4 is disposed on the insulating layer 153-3. The insulating layer 153-4 is disposed on the insulating layer 153-3 and the electrode 151-4. The electrode 151-5 is disposed on the insulating layer 153-4. The insulating layer 153-5 is disposed on the insulating layer 153-4 and the electrode 151-5. The electrode 151-6 is disposed on the insulating layer 153-5. The insulating layer 153-6 is disposed on the insulating layer 153-5 and the electrode 151-6. The electrode 133 is disposed on the insulating layer 153-6.
The plurality of through electrodes 155 are connected to the plurality of electrodes 151. Specifically, the through electrode 155-1 connects the electrode 151-3 and the electrode 151-4. The through electrode 155-2 connects the electrode 151-3 and the electrode 151-5. The through electrode 155-3 connects the electrode 151-2 and the electrode 151-5. The through electrode 155-4 connects the electrode 151-2 and the electrode 151-6. The through electrode 155-5 connects the electrode 151-1 and the electrode 151-6. The through electrode 155-6 connects the electrode 151-1 and the electrode 133 (corresponding to the portion 133A of fig. 3). At this time, the through electrodes 155-1 to 155-6 are disposed in at least one of the insulating layers 153-1 to 153-6. As shown in fig. 14 a, the electrode 151-4 is connected to the electrode 133 (corresponding to the portion 133B in fig. 3) via a through electrode (not shown).
As shown in (B) of fig. 14, the coil antenna 130-3 has a vortex shape when sectioned. With this shape, the inductance can be increased in a small area.
< fourth embodiment >
In this embodiment, a description will be given of a mobile radio communication device including a coil antenna having a different form from the first to third embodiments.
Fig. 15 is a perspective view of the IC tag 100-4. Fig. 16 is a schematic sectional view showing a part of the coil antenna 130-4 of the IC tag 100-4. As shown in fig. 15 and 16, the coil antenna 130-4 includes an antenna 130-4-1 and an antenna 130-4-2. The antenna 130-4-1 is disposed on the substrate 145-4-1 and has a loop shape. The antenna 130-4-2 is disposed on the substrate 145-4-2 and has a loop shape. The antenna 130-4-1 and the antenna 130-4-2 are configured to overlap. An insulating layer 160 is disposed between the substrate 145-4-1 and the substrate 145-4-2. The material of the insulating layer 160 is not particularly limited, but an inorganic insulating material, an organic insulating material, or a material containing an inorganic insulating material and an organic insulating material can be used. For example, as the insulating layer 160, a plastic molding material containing an epoxy resin in a fibrous glass substrate can be used. An adhesive may be disposed between the substrate 145-4-1 and the substrate 145-4-2 and the insulating layer 160.
The antenna 130-4-1 has a plurality of electrodes 133-4-1, a plurality of electrodes 137-4-1, and a plurality of through electrodes 135-4-1. Portion 133-4-1A of electrode 133-4-1 is connected to portion 137-4-1B of one electrode 137-4-1 by one through electrode 135-4-1. Portion 133-4-1B of electrode 133-4-1 is connected to portion 137-4-1A of another electrode 137-4-1 by another through electrode 135-4-1.
Similarly, the antenna 130-4-2 has a plurality of electrodes 133-4-2, a plurality of electrodes 137-4-2, and a plurality of through electrodes 135-4-2. Portion 133-4-2A of electrode 133-4-2 is connected to portion 137-4-2B of one electrode 137-4-2 by one through electrode 135-4-2. Portion 133-4-2B of electrode 133-4-2 is connected to portion 137-4-2A of another electrode 137-4-2 by another through electrode 135-4-2.
The electrode 133-4-3 disposed on the first surface 145-4-1A of the substrate 145-4-1 is connected to the electrode 137-4-3 disposed on the second surface 145-4-2B of the substrate 145-4-2 by a through electrode 135-4-3. That is, antenna 130-4-1 is locally connected to antenna 130-4-2.
By having the above-described configuration, the coil antenna in which the coil antennas shown in fig. 1 and 3 are stacked two by two is formed as one coil antenna. This can increase the number of turns of the coil antenna as a whole, and thus can increase the induced electromotive force. Further, the outer diameter can be reduced while keeping the opening area of the coil antenna large. Therefore, the sensitivity of the coil antenna can be improved while reducing the shape of the IC tag.
Specific examples of mounting the IC tag 100 described in the first to fourth embodiments will be described below.
Fig. 17 is a diagram illustrating a portable medium to which the IC tag 100 is attached. The IC tag 100 is used in various fields such as merchandise management, personal identification, security measures, electronic tickets, game cards, and business transaction approval. Fig. 17 (a) is a schematic diagram of coin 1000. Fig. 17 (B) is a schematic diagram of the playing card 2000. Fig. 17 (C) is a schematic diagram of an ID (Identification) card 3000.
In these media, information can be obtained by stacking a plurality of IC tags 100.
The above-described embodiments as embodiments of the present invention can be combined and implemented as appropriate as long as they are not contradictory to each other. Further, addition, deletion, or design change of the constituent elements appropriately performed by those skilled in the art based on the respective embodiments is included in the scope of the present invention as long as the gist of the present invention is achieved.
It is to be understood that the effects of the present invention are not limited to the above-described embodiments, and various other effects and advantages can be easily expected by those skilled in the art.
(modification 1)
In the first embodiment of the present invention, the IC tag having a circular shape in a plan view has been described, but the present invention is not limited thereto. Fig. 18 is a plan view of the IC tag 100-5. The IC tag 100-5 includes an IC chip 110, a coil antenna 130-5, and a substrate 145. The IC chip 110 and the coil antenna 130-5 are disposed on the substrate 145. As shown in fig. 18, the coil antenna 130-5 may have a rectangular shape in a plan view.
(modification 2)
In addition, the IC tag 100 may further have a shielding material. Fig. 19 is a top view of the IC tag 100-6 and a top view of the shield 180. Fig. 20 is a cross-sectional view between a1-a2 of IC tag 100-6. As shown in fig. 19 (B), the shield 180 is ring-shaped, but has a cutout in part (thus, the shield 180 may be said to have a C-like shape). In fig. 20, the IC tag 100-6 includes an insulating layer 170 (insulating layer 170-1) and a shield 180 (shield 180-1) on the first surface 145A side of the base 145. In addition, the IC tag 100-6 includes an insulating layer 170 (insulating layer 170-2) and a shield 180 (shield 180-2) on the second surface 145B side of the base 145. In this case, the shield 180 may be disposed to overlap the coil antenna 130. As the insulating layer 170 (the insulating layer 170-1 and the insulating layer 170-2), the same material as the insulating layer 160 can be used. As the shield 180 (shield 180-1 and shield 180-2), a magnetic material may be used. Specifically, magnetic materials having magnetic properties such as iron (Fe), nickel (Ni), cobalt (Co), and ferrite are used as the shield 180. The shield 180 may be provided with a conductor such as copper (Cu) or aluminum (Al), and is not limited to a magnetic body. In addition, the shield 180 may be disposed on any one of the first surface 145A and the second surface 145B.
Fig. 21 is a sectional view in a case where a plurality of IC tags 100-6 are stacked. In fig. 21, the IC tag 100-6 has a shield 180, thereby shielding the magnetic field generated by each coil antenna 130. Mutual interference is prevented even in the case where a plurality of sheets are stacked. Thus, even if a plurality of IC tags are stacked, the information of the IC tags can be stably read.
(modification 3)
In the first embodiment of the present invention, an example in which the through electrode is formed by a plating method is shown, but the present invention is not limited thereto. For example, the first electrode and the second electrode may be connected by forming wiring patterns on the first surface 145A and the second surface 145B of the base 145 using a material having high ductility such as aluminum, and physically applying pressure (which may be referred to as caulking) from both sides of the first surface 145A and the second surface 145B to the opening to form a connection portion serving as a through electrode.
(modification 4)
In the first to fourth embodiments of the present invention, the coil antenna having the upper electrode, the lower electrode, and the through electrode on the insulating base material is described, but the present invention is not limited to this. Fig. 22 is a plan view of the IC tag 100-7. The IC tag 100-7 includes an IC chip 110, a coil antenna 130-7, and a support 149. The support 149 is used to support the form of the coil antenna 130-7, but the support 149 is not necessarily provided.
In fig. 22, the coil antenna 130-7 has a spiral shape in the winding direction. The coil antenna 130-7 may be formed using a winding machine. Since the magnetic field generated by the coil antenna 130-7 does not leak to the outside of the IC tag 100-7, the IC tag can be read even when a plurality of IC tags 100-7 are stacked.
(description of reference numerals)
100: an IC tag; 110: a chip; 111: a voltage limiting circuit; 113: a rectifying circuit;
115: a demodulation circuit; 117: a modulation circuit; 119: a control circuit; 121: a storage unit;
123: a resistance; 130: an antenna section; 133: an electrode; 135: a through electrode; 137: an electrode;
140: a support portion; 145: a substrate; 149: a support body; 151: an electrode; 153: an insulating layer;
155: a through electrode; 160: an insulating layer; 170: an insulating layer; 180: a shield;
300: a reader/writer; 310: a control circuit; 313: a storage unit; 320: a modulation circuit;
330: a transmission circuit; 340: an antenna; 350: a receiving circuit; 360: a demodulation circuit;
370: an oscillation circuit; 380: a carrier wave; 1000: a coin; 2000: playing cards;
3000: an ID (Identification) card.
Claims (18)
1. A portable wireless communications device, comprising:
an insulating base material having a first surface and a second surface opposite to the first surface;
a coil antenna disposed in a loop on the insulating base material; and the number of the first and second groups,
an IC chip electrically connected to the coil antenna,
the coil antenna includes: a plurality of first electrodes disposed on the first surface side of the insulating base material and having a first portion and a second portion; a plurality of second electrodes disposed on the second surface side of the insulating base material and having a third portion and a fourth portion; and a plurality of through-electrodes disposed in the insulating base material,
the first portion of one of the plurality of first electrodes is connected to the fourth portion of one of the plurality of second electrodes using one of the plurality of through electrodes,
the second portion of the one of the plurality of first electrodes is connected to the third portion of the other of the plurality of second electrodes using the other of the plurality of through-hole electrodes.
2. The portable wireless communication device of claim 1,
at least one of the plurality of first electrodes and the plurality of second electrodes has a meandering shape.
3. The portable wireless communication device of claim 1,
the coil antenna includes a loop-shaped first antenna and a loop-shaped second antenna disposed inside the first antenna in plan view, and the first antenna and the second antenna are locally connected.
4. The portable wireless communication device of claim 1,
the coil antenna includes a loop-shaped first antenna and a loop-shaped second antenna disposed so as to overlap with the first antenna, and the first antenna and the second antenna are locally connected.
5. The portable wireless communication device of claim 1,
includes a shield disposed so as to overlap the coil antenna.
6. The portable wireless communication device of claim 1,
the coil antenna has a circular shape in plan view.
7. The portable wireless communication device of claim 1,
the coil antenna has a rectangular shape in plan view.
8. A portable wireless communications device, comprising:
a coil antenna configured in a ring shape; and the number of the first and second groups,
an IC chip electrically connected to the coil antenna,
the coil antenna has a spiral shape in a circumferential direction.
9. The portable wireless communication device of claim 8,
the coil antenna includes a loop-shaped first antenna and a loop-shaped second antenna disposed inside the first antenna in plan view, and the first antenna and the second antenna are locally connected.
10. The portable wireless communication device of claim 8,
the coil antenna includes a loop-shaped first antenna and a loop-shaped second antenna disposed so as to overlap with the first antenna, and the first antenna and the second antenna are locally connected.
11. The portable wireless communication device of claim 8,
includes a shield disposed so as to overlap the coil antenna.
12. The portable wireless communication device of claim 8,
the coil antenna has a circular shape in plan view.
13. The portable wireless communication device of claim 8,
the coil antenna has a rectangular shape in plan view.
14. A portable wireless communications device, comprising:
an insulating base material having a first surface and a second surface opposite to the first surface;
a coil antenna disposed in a loop on the insulating base material; and the number of the first and second groups,
an IC chip electrically connected to the coil antenna,
the coil antenna is disposed on the first surface or the second surface of the insulating base material, and includes a plurality of insulating layers, a plurality of electrodes, and a plurality of through-electrodes, wherein the plurality of through-electrodes are disposed on the plurality of insulating layers and connect the plurality of electrodes, and the coil antenna has a spiral shape in cross section.
15. The portable wireless communication device of claim 14,
includes a shield disposed so as to overlap the coil antenna.
16. The portable wireless communication device of claim 14,
the coil antenna has a circular shape in plan view.
17. The portable wireless communication device of claim 14,
the coil antenna has a rectangular shape in plan view.
18. An information identifying apparatus comprising:
a portable radio communication device and a reader/writer as claimed in any one or more of claims 1 to 17.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-253950 | 2017-12-28 | ||
| JP2017253950A JP6781145B2 (en) | 2017-12-28 | 2017-12-28 | Portable wireless communication device and information identification device using portable wireless communication device |
| PCT/JP2018/040743 WO2019130811A1 (en) | 2017-12-28 | 2018-11-01 | Portable wireless communication device, and information identification apparatus using portable wireless communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111492536A true CN111492536A (en) | 2020-08-04 |
Family
ID=67066973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880082795.1A Pending CN111492536A (en) | 2017-12-28 | 2018-11-01 | Portable radio communication device and information identification device using the same |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP6781145B2 (en) |
| KR (1) | KR102382309B1 (en) |
| CN (1) | CN111492536A (en) |
| PH (1) | PH12020550900A1 (en) |
| SG (1) | SG11202005644WA (en) |
| WO (1) | WO2019130811A1 (en) |
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- 2018-11-01 CN CN201880082795.1A patent/CN111492536A/en active Pending
- 2018-11-01 SG SG11202005644WA patent/SG11202005644WA/en unknown
- 2018-11-01 KR KR1020207021253A patent/KR102382309B1/en active IP Right Grant
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Also Published As
| Publication number | Publication date |
|---|---|
| KR102382309B1 (en) | 2022-04-04 |
| SG11202005644WA (en) | 2020-07-29 |
| PH12020550900A1 (en) | 2021-03-22 |
| JP6781145B2 (en) | 2020-11-04 |
| JP2019121849A (en) | 2019-07-22 |
| KR20200098675A (en) | 2020-08-20 |
| WO2019130811A1 (en) | 2019-07-04 |
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