JP4641096B2 - Non-contact data carrier device and wiring member for booster antenna - Google Patents

Non-contact data carrier device and wiring member for booster antenna Download PDF

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Publication number
JP4641096B2
JP4641096B2 JP2000372593A JP2000372593A JP4641096B2 JP 4641096 B2 JP4641096 B2 JP 4641096B2 JP 2000372593 A JP2000372593 A JP 2000372593A JP 2000372593 A JP2000372593 A JP 2000372593A JP 4641096 B2 JP4641096 B2 JP 4641096B2
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Japan
Prior art keywords
coil
wiring
data carrier
wiring layer
antenna
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Expired - Fee Related
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JP2000372593A
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JP2002175508A (en
Inventor
樋口  拓也
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大日本印刷株式会社
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10158Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field
    • G06K7/10178Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field including auxiliary means for focusing, repeating or boosting the electromagnetic interrogation field

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a non-contact type data carrier device provided with a booster antenna section and a coil-on-chip type semiconductor chip for data carrier or a coil-on-chip type semiconductor chip module for data carrier.
[0002]
[Prior art]
In recent years, IC cards are gradually spreading from the viewpoint of information confidentiality, and in recent years, non-contact type IC cards that exchange information without contacting a reader / writer (reader / writer) have been proposed.
In particular, a method of exchanging signals with an external read / write device or performing signal exchange and power supply by electromagnetic waves is generally used.
On the other hand, various non-contact IC tags in the form of sheets or bills, in which ICs with data are connected to antenna coils, have been proposed in recent years and can be attached to products and packaging boxes to prevent shoplifting, logistics systems, etc. It has come to be used.
In such non-contact type data carriers such as non-contact type IC cards and IC tags, signal exchange with the outside, or signal exchange with the outside and power supply are performed by electromagnetic waves. From the viewpoint of productivity, it has been formed by etching.
In some cases, in order to achieve a sufficient number of turns and a sufficient inductance in a limited area of size, a method of forming coil wiring in two layers has been adopted.
[0003]
Recently, a test product of a semiconductor chip or a semiconductor chip module in which an antenna is provided on an IC chip itself as a data carrier, that is, a coil-on-chip type, is provided. The card is being researched.
In such a non-contact type data carrier device such as a non-contact type IC card or a non-contact type IC tag, a booster antenna coil for exchanging signals with the outside is provided, and this is used as a primary coil for electromagnetic coupling with this. A method of realizing a non-contact method by including a coil-on-chip semiconductor chip for data carrier provided with a secondary coil or another data carrier module has become common.
In this case, the booster antenna coil (primary coil) and the coil on-chip data carrier semiconductor chip or the secondary coil of another data carrier module are not directly connected but are used with their relative positions included. .
Conventionally, as shown in FIG. 4A, for example, a coil dense portion 311a is provided on the booster antenna 311 side, and a secondary il of a coil-on-chip semiconductor chip for data carrier is overlaid thereon. It was mounted on the frame indicated by the dotted line 4 (a).
The coil shape of the coil-on-chip type semiconductor chip for data carrier and the shape of the coil dense portion 311a are substantially matched to improve the efficiency of electromagnetic coupling.
[0004]
In the case of such a non-contact method, a precise conduction method is required in which a through hole is formed in the center of the coil dense portion 311a and the connection 311s is made on the other side of the antenna coil 311.
The coil (secondary coil) on the coil on chip type data carrier semiconductor chip is a small size of about 3 to 5 mm square, and the corresponding coil dense portion 311a of the primary coil (booster antenna coil) is also a small size. In addition, since the through hole is drilled in the center portion with high precision processing and alignment is difficult, the data carrier device having the configuration shown in FIG. 4A has a problem that the yield is lowered. It was.
FIG. 4B illustrates a coil-on-chip data carrier semiconductor chip (also referred to as a data carrier semiconductor chip module).
This coil-on-chip semiconductor chip for data carrier is formed by forming an antenna coil 355 on the terminal surface side of the semiconductor chip 351 by a plating method or the like so that the semiconductor chip 351 has a communication function. Are connected to terminals 352 of the semiconductor chip 351.
A data carrier module provided with a secondary coil is a generic term for modules that have a fine coil to be a secondary coil and are directly connected to the data carrier part.
Thus, by providing a booster antenna (primary coil) and a coil-on-chip semiconductor chip for data carrier or data carrier module provided with a secondary coil, a data carrier device at a practical level in a non-contact manner. realizable.
[0005]
[Problems to be solved by the invention]
As described above, recently, a booster antenna coil (primary coil) for exchanging signals with the outside, and a coil-on-chip semiconductor chip for data carrier or data carrier module provided with a secondary coil that is electromagnetically coupled thereto are provided. The non-contact type data carrier device shown in FIG. 4 (a) has been studied, but complicated and highly precise processing such as through-hole processing is required, and the yield is low. Response was required.
The present invention corresponds to this, and a booster antenna coil (primary coil) for exchanging signals with the outside and a coil-on-chip semiconductor chip for data carrier or data carrier provided with a secondary coil electromagnetically coupled thereto This is a non-contact type data carrier device equipped with a module, which does not require high-precision processing such as through-hole processing, does not cause a decrease in yield, and has a booster antenna coil (primary coil). An object of the present invention is to provide a non-contact type data carrier device having high magnetic coupling efficiency with the secondary coil.
[0006]
[Means for Solving the Problems]
A non-contact type data carrier device according to the present invention includes a first wiring layer and a second wiring layer, each having an antenna coil in at least one of them, overlapped with each other through a dielectric layer. A coil-on-chip type which is capacitively coupled and is directly connected by caulking both wiring layers, and a booster antenna unit as a primary coil and a secondary coil for electromagnetic coupling with the booster antenna unit. A non-contact type data carrier device comprising a semiconductor chip for data carrier or other data carrier module, wherein both the first wiring layer and the second wiring layer of the booster antenna section circulate on one plane A coil wiring portion that forms an antenna coil, and a planar conductor portion that is connected to the end portion of the coil wiring portion and extends along the antenna coil surface. A coil wiring portion provided on the inner side and the outer side, or one of the first wiring layer and the second wiring layer circulates on one plane to form an antenna coil, and an end portion of the coil wiring portion Are provided on the inner and outer sides of the antenna coil, respectively, and the other has only the planar conductor portion, and the inner and outer sides of the antenna coil. Each of the planar conductor portions provided on the outer side is opposed to the planar conductor portion of the other wiring layer, and one of them forms a capacitance portion between the planar conductor portions of both wiring layers, and both wiring layers Are coupled to each other, and the other of the planar conductor portions of both wiring layers is squeezed into conduction, and the antenna coil of the wiring layer has a data carrier semiconductor chip or other data carrier at one peripheral portion thereof. Module, secondary coil Along the shape, substantially this overlapped with each other so, provided the detour to detour in a substantially rectangular shape, Electromagnetically coupled with the secondary coil on the semiconductor chip or other data carrier module It is characterized by being formed.
And above Non-contact data carrier device of Both the first wiring layer and the second wiring layer of the booster antenna section are connected to the coil wiring section that circulates on one plane to form the antenna coil, and to the end of the coil wiring section. The planar conductor portions are provided inside and outside the antenna coil respectively, and the detour portion of the first antenna coil and the detour portion of the second antenna coil have the same shape, It is the same size and is characterized by being almost coincident and overlapping.
And Also, the above Any non-contact data carrier device, It is a non-contact IC tag or a non-contact IC card.
[0007]
In addition, here, “provide a detour that bypasses in a substantially square shape so as to substantially overlap the outer shape of the secondary coil,” means that the electromagnetic coil between the antenna coil and the secondary coil of each wiring layer By overlapping so that the coupling becomes efficient, the center of the detour of the antenna coil and the center of the secondary coil of each wiring layer are matched, and the detour and the secondary coil are It means a state of almost overlapping.
Here, it is assumed that the outer shape of the secondary coil is a square shape.
[0008]
The wiring member for a booster antenna part of the present invention has a booster antenna part which is a primary coil for electromagnetically coupling with a coil of a chip on a data carrier semiconductor chip or other data carrier module as a secondary coil. A booster antenna wiring member for a non-contact data carrier device to be formed, wherein at least one of the first wiring layer having an antenna coil and the second wiring layer are interposed via a dielectric layer. In this case, both wiring layers are capacitively coupled, and both wiring layers are caulked and directly connected. Both the first wiring layer and the second wiring layer of the booster antenna section are on a single plane. A coil wiring portion that wraps around the antenna coil and an end portion of the coil wiring portion that is connected to the end of the coil wiring portion, and a planar conductor portion along the antenna coil surface A coil wiring portion provided inside and outside the antenna coil, or one of the first wiring layer and the second wiring layer circulates on one plane to form the antenna coil, and the coil Connected to the end of the wiring portion, and provided with planar conductor portions along the antenna coil surface on the inner and outer sides of the antenna coil, respectively, the other has only the planar conductor portion, and The planar conductor portions provided inside and outside the antenna coil are respectively opposed to the planar conductor portions of the other wiring layers, and one of them forms a capacitance portion between the planar conductor portions of both wiring layers. The two wiring layers are capacitively coupled, and the other is squeezed and conductive between the planar conductors of the two wiring layers, and the coil wiring part is a coil when the non-contact type data carrier device is manufactured. There is an on-chip data carrier semiconductor chip Is provided with a substantially square-shaped detour that substantially overlaps the outer periphery of the secondary coil at one peripheral portion thereof so as to be electromagnetically coupled to the secondary coil of the data carrier module. Is.
And above Wiring member for the booster antenna part of The first wiring layer and the second wiring layer are formed by external processing by etching.
And also above Any booster antenna wiring member, At least one of the planar conductor portions to be capacitively coupled in the first wiring layer or the second wiring layer is formed with a cut portion provided with a half-etched portion and / or a through-hole portion for changing the area. It is characterized by that.
[0009]
[Action]
The non-contact type data carrier device of the present invention has the above-described configuration, whereby a booster antenna coil (primary coil) for exchanging signals with the outside and a coil-on-chip semiconductor chip for data carrier or a coil-on-chip. This is a non-contact type data carrier device equipped with a coil (secondary coil) on a semiconductor chip of a semiconductor module for a data carrier, which does not require high precision processing such as drilling through holes. It is possible to provide a non-contact type data carrier device that does not cause a decrease in yield due to, and has high magnetic coupling efficiency between a booster antenna coil (primary coil) and a coil (secondary coil) on a semiconductor chip. .
Specifically, both the first wiring layer and the second wiring layer of the booster antenna section are connected to the coil wiring section that circulates on one plane to form the antenna coil, and to the end of the coil wiring section. The planar conductor portions along the antenna coil surface are respectively provided on the inner side and the outer side of the antenna coil, or one of the first wiring layer and the second wiring layer is on one plane. A coil wiring portion that wraps around to form an antenna coil, and is connected to the end portion of the coil wiring portion, and is provided with planar conductor portions along the antenna coil surface on the inside and outside of the antenna coil, respectively, However, each of the planar conductor portions provided on the inner and outer sides of the antenna coil is opposed to the planar conductor portion of the other wiring layer, and one of them is Capacitance section between planar conductors of both wiring layers The wiring layers are capacitively coupled to each other, and the other is made conductive by caulking the planar conductors of both wiring layers, and the antenna coil of the wiring layer is a data carrier semiconductor at one peripheral portion thereof. Provide a detour around the square of the chip or other data carrier module so that it almost overlaps the outer shape of the secondary coil. Electromagnetically coupled with the secondary coil on the semiconductor chip or other data carrier module This is achieved by being formed.
Then, both the first wiring layer and the second wiring layer of the booster antenna section circulate on one plane to form an antenna coil, and are connected to the end of the coil wiring section. In the case where the planar conductor portions along the surface are respectively provided inside and outside the antenna coil, the bypass portion of the first antenna coil and the bypass portion of the second antenna coil are the same as each other. The shape and the same size, and overlapping substantially coincidentally, can improve the electromagnetic coupling efficiency.
This is particularly effective when the non-contact type data carrier device is a non-contact IC tag or a non-contact IC card.
Both the first wiring layer and the second wiring layer of the booster antenna section are connected to the coil wiring section that circulates on one plane to form the antenna coil, and to the end of the coil wiring section. In the case where the planar conductor portions are provided on the inner side and the outer side of the antenna coil, respectively, the planar conductor portions for forming the capacitor portion are provided on the inner side and the outer side of the antenna coil portion. The coil wiring portion of the wiring layer and the coil wiring portion of the second wiring layer are capacitively coupled in series at both ends, and the first wiring layer is caulked between the planar conductor portions. A process of making a through hole and conducting the coil wiring part of the first wiring layer and the coil wiring part of the second wiring layer by directly connecting the coil wiring part and the second wiring layer. Result, yield High can be produced, to a low cost.
Furthermore, even when a through hole is opened and the coil wiring portion of the first wiring layer and the coil wiring portion of the second wiring layer are conducted, it is possible to provide a wide pad for conducting (for example, one surface) By using the conductive conductor as a conductive pad), it is not necessary to use difficult conduction technology that involves microfabrication such as through-hole manufacturing of fine parts.
[0010]
The wiring member for a booster antenna part of the present invention has the above-described configuration, whereby a booster antenna (primary coil) and a coil-on-chip data carrier semiconductor chip or data carrier module provided with a secondary coil are provided. This non-contact data carrier device has a low cost and can provide a device with good electromagnetic coupling efficiency between a booster antenna and an antenna coil on a semiconductor chip.
In the case where the wiring member is externally processed by etching, the wiring can be finely and accurately formed, which is excellent in quality and suitable for mass production.
In this case, at least one of the planar conductor portions of the first wiring layer or the second wiring layer is formed with a half-etched portion and / or a through-hole portion for changing the area. By doing so, the electrode area of the capacitor portion to be formed can be changed, and the degree of freedom can be increased.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a schematic sectional view showing a layer structure of an example of an embodiment of a non-contact type data carrier device of the present invention, and FIG. 1B is a view from the A1-A2 side of FIG. FIG. 1C is a schematic diagram of the second coil wiring layer viewed from the A3-A4 side in FIG. 1A, and FIG. FIG. 2A is an enlarged view of a detour portion, FIG. 2A is an overall schematic circuit diagram of the non-contact data carrier device shown in FIG. 1A, and FIG. 2B is a coil-on-chip type semiconductor. It is the figure which showed one example of the structure of a chip | tip (it is also called a semiconductor chip module).
FIG. 3A is a schematic cross-sectional view showing the layer configuration of the first example of the embodiment of the wiring member for the booster antenna part of the present invention, and FIG. 3B is B1 in FIG. FIG. 3C is a schematic diagram of the first coil wiring layer viewed from the B2 side, and FIG. 3C is a schematic diagram of the second coil wiring layer viewed from the B3-B4 side of FIG. FIG. 5A is a schematic circuit diagram of the wiring member for the booster antenna part shown in FIG. 3A, and FIG. 5A is the first wiring layer of the second example of the embodiment of the wiring member for the booster antenna part of the present invention. 5 (b) is a schematic diagram of the second wiring layer, and FIG. 6 (a) is a first example of the third example of the embodiment of the wiring member for the booster antenna portion of the present invention. FIG. 6B is a schematic diagram of the second wiring layer.
1 (b), FIG. 1 (c), FIG. 3 (b), FIG. 3 (c), FIG. 5, and FIG. It is shown.
1 to 3, 5, and 6, 110 is a first wiring layer, 111 is a first antenna coil (also referred to as a coil wiring portion), 111 a is a square-shaped detour portion, and 111 A is (square-shaped) , 116 and 117 are planar conductor portions, 118 is an alignment mark, 120 is a second wiring layer, 121 is a second antenna coil (also referred to as a coil wiring portion), and 121a. Is a square detour portion, 121A is a central portion (of the square detour portion), 126 and 127 are planar conductor portions, 126a is a notch portion, and 130 is an insulating sheet (dielectric layer or simply insulating) 150 is a semiconductor chip (also called a semiconductor chip for data carrier), 161 and 162 are protective sheets, 180 is a caulking connection part, 510 is a first wiring layer, and 511 is a first antenna coil (coil wiring). Part ) 511a is a square bypass portion, 516 and 517 are planar conductor portions, 516a is a notch portion, 518 is an alignment mark, 520 is a second wiring layer, and 521 is a second antenna coil ( 521a is a square-shaped detour portion, 526 and 527 are planar conductor portions, 528 is an alignment mark, 610 is a first wiring layer, and 611 is an antenna coil (also referred to as a coil wiring portion). 611a is a square detour part, 616 and 617 are planar conductor parts, 616a is a notch part, 618 is an alignment mark, 620 is a second wiring layer, and 626 and 627 are planar parts. It is a conductor part.
[0012]
An example of an embodiment of the non-contact type data carrier device of the present invention will be described with reference to FIG.
In this example, the first wiring layer 110 having the first antenna coil 111 and the second wiring layer 120 having the second antenna coil 121 having the same shape and the same size in the antenna coil portion are combined with the insulating sheet. (Dielectric layer) 130 is overlapped, both wiring layers are capacitively coupled with the planar conductor portion, and the planar conductor portion is contacted by caulking, and both wiring layers are electrically connected directly. A non-contact type data carrier device comprising: a booster antenna unit; and a coil-on-chip semiconductor chip for data carrier, wherein a coil for electromagnetically coupling with the booster antenna unit is provided on the semiconductor chip. (IC tag).
Then, the first wiring layer 110 and the second wiring layer 120 of the booster antenna unit are connected to the coil wiring unit that circulates on one plane to form the antenna coil, and the end of the coil wiring unit, Planar conductor portions along the antenna coil surface are respectively provided on the inner side and the outer side of the antenna coil, and the wiring layers 110 and 120 respectively circulate on one plane to form the antenna coil. Coil wiring portions (111, 121) and planar conductor portions 116, 126 connected to the ends of the coil wiring portions (111, 121) and along the antenna coil surface are respectively arranged inside the antenna coil. Planar conductor portions 117 and 127 are provided outside the antenna coil, respectively, and a capacitor portion (A5 in FIG. 1A) is provided between the planar conductor portions 116 and 126 of both wiring layers 110 and 120. ), The two wiring layers are capacitively connected at one end of the coil wiring portion, and the planar conductor portions 117 and 127 are brought into contact with each other by caulking to form the caulking connection portion 180. Are electrically connected directly at the other end of the coil wiring portion.
The front and back are covered with protective sheets 161 and 162.
In this example, in particular, the antenna coil (111, 121) of each wiring layer (110, 120) has a data carrier at one peripheral portion thereof as shown in FIGS. 1 (b) and 1 (c), respectively. A detour that detours in a substantially square shape so as to substantially overlap with the outer shape of a coil (hereinafter also referred to as a secondary coil, which corresponds to the coil L3 in FIG. 2) formed on the terminal surface of the semiconductor chip 150 for use. 111 a and 121 a are provided and are electromagnetically coupled to the secondary coil on the semiconductor chip 150.
In addition, the antenna coil of each wiring layer is provided with detours 111a and 121a that detour in a substantially square shape so as to be almost overlapped along the outer shape of the secondary coil of the semiconductor chip. As described above, it means that the antenna coils 111 and 121 in each wiring layer are overlapped so that electromagnetic coupling between the secondary coil of the semiconductor chip is efficient. In other words, the center 111A (121A) of the detours 111a and 121a and the center (not shown) of the antenna coil of the semiconductor chip are made to coincide so that the detours 111a and 121a and the antenna coil of the semiconductor chip almost overlap. Means the state.
The secondary coil on the semiconductor chip 150 is densely integrated, and the line width and density thereof do not match the line width and density of the antenna coils of the wiring layers 110 and 120. As a result, the magnetic coupling efficiency can be increased.
Here, it is assumed that the outer shape of the secondary coil on the semiconductor chip 150 is a square shape.
[0013]
The schematic configuration of the circuit of the data carrier device (IC tag) shown in FIG. 1A is as shown in FIG.
That is, the coil L1 (corresponding to the first antenna coil 111) and the coil L2 (corresponding to the second antenna coil 121) are capacitively coupled at one end thereof to form an LC resonance circuit in communication with an external circuit in series. is doing.
In FIG. 2A, C1 is a capacitance formed by the planar conductor portions 116 and 126.
The planar conductor portions 117 and 127 form a caulking connection portion 180 by caulking.
The first antenna coil 111 and the second antenna coil 121 are formed larger than the antenna coil on the semiconductor chip 150 and can take a large resonance peak of a signal from an external read / write device (reader / writer). Compared with the antenna coil on the semiconductor chip 150, long-distance communication is possible.
FIG. 2A also shows that a coil L1 (corresponding to the first antenna coil 111) and a coil L2 (corresponding to the second antenna coil 121) are a part of the secondary on the semiconductor chip 150. It shows that the coil (coil L3) is electromagnetically coupled.
For this reason, the external read / write device is a circuit in which a booster antenna unit (in FIG. 2, a coil L1 (corresponding to the first antenna coil 111) and a coil L2 (corresponding to the second antenna coil 121) are connected in series with a capacitor C1. It is possible to communicate with the secondary coil of the semiconductor chip 150 through a unit within a predetermined distance range corresponding thereto.
That is, the data carrier semiconductor device can be accessed from the external read / write device via the booster antenna unit.
FIG. 2B is a diagram showing a schematic configuration of a data-on-chip data carrier semiconductor chip as a data carrier device, and the coil L3 also constitutes a resonance circuit.
An input signal from the coil L3 is accessed to the memory 184 via the control unit 183, a signal from the memory is sent to the transmission circuit 182 via the control unit 183, and further, via the coil L3, via the booster antenna unit, Sent to an external circuit.
The memory 184 stores various information necessary for the data carrier device.
The non-contact type data carrier device (IC tag) of this example forms a resonant circuit with a coil and a capacitor to transmit and receive a radio wave of a constant frequency.
In general, a frequency band of 125 kHz (medium wave), 13.56 MHz, 2.45 GHz (microwave) is used, and a communication distance of about 2 cm at 125 kHz and about 20 cm at 13.56 MHz.
The actual communication distance varies greatly depending on the antenna area and the output power of the reader / writer.
Usually, a 50 mm × 50 mm size IC tag can provide a communication distance of 50 to 60 cm.
[0014]
Next, each part will be described.
The insulating sheet (dielectric layer) 130 is selected depending on the purpose of use of the data carrier device, but is a hard vinyl chloride sheet or polyester that is insulative and also functions as a dielectric layer for forming a capacitor. A sheet (PET) or a polyimide or glass epoxy resin sheet is used.
The thickness of the insulating sheet 130 is about 20 to 150 μm, preferably about 25 to 100 μm.
Usually, a material in which aluminum, copper foil or iron foil having a thickness of 5 to 50 μm is laminated on both surfaces of the base material, and the aluminum or copper foil or the like is etched to form the first antenna coil wiring layer 110 or the first layer. Two antenna coil wiring layers 120 are formed.
[0015]
The same base material may be used for the protective sheets 161 and 162, but an inexpensive material such as paper may be used.
IC tags (data carry devices) are generally used in production and distribution processes, and decorative elements are not so required unless they are carried around by people such as commuter passes.
For non-special purposes, small data carrier semiconductor chips are desired and are typically manufactured in units of 50 mm × 50 mm or less.
[0016]
FIGS. 1B and 1C are diagrams showing examples of the first antenna coil wiring layer 110 and the second antenna coil wiring layer 120 each having an antenna coil.
In order to efficiently perform electromagnetic coupling with the coil on the semiconductor chip of the coil-on-chip type data carrier semiconductor chip 150, the square detours 111a and 121a overlap each other.
In the case of this example, the antenna coil portions of both wiring layers have the same shape and size, and the antenna coil portions of both wiring layers are overlapped with each other except for the square detour portions 111a and 121a. Except for the detour portions 111a and 121a, the antenna coil portions of the two wiring layers do not necessarily coincide and overlap, and one of them may be interpolated or extrapolated to the other.
The coil winding direction is adjusted so that the magnetic fluxes do not cancel each other with respect to the antenna coil 111 of the first antenna coil wiring layer 110 and the antenna coil of the second antenna coil wiring layer 120.
[0017]
Next, the 1st example of embodiment of the wiring member for booster antenna parts of this invention is demonstrated based on FIG.
As shown in FIG. 3A, the first example includes a first antenna coil wiring layer 110 having a first antenna coil 111, a second antenna coil wiring layer 120 having a second antenna coil, and the like. And the first antenna coil 111 and the second antenna coil 121 are capacitively coupled in series at one end thereof, and at the other end through an insulating sheet (dielectric layer) 130. This is a wiring member for a booster antenna part for the IC tag shown in FIG. 1A, in which a planar conductor part is brought into contact by caulking and both wiring layers are electrically connected directly.
This is a wiring member for a booster antenna part for a non-contact type IC tag that forms a booster antenna part that is a primary coil for electromagnetic coupling with a coil-on-chip semiconductor chip for a data carrier as a secondary coil. .
As shown in FIGS. 3B and 3C, each of the antenna coil wiring layers 110 and 120 includes coil wiring portions 111 and 121 that circulate on one plane to form an antenna coil, and coil wirings, respectively. The planar conductor portions 116 and 126 are connected to the ends of the portions 111 and 121, and the planar conductor portions 117 and 127 are provided outside the antenna coil along the antenna coil surface. .
The coil wiring portions 111 and 121 are arranged on one peripheral portion of the coil-on-chip data carrier semiconductor chip so as to be electromagnetically coupled to the secondary coil when the non-contact type data carrier device is manufactured. Substantially rectangular detours 111a and 121a are provided along the outer shape of the next coil.
This example is composed of the insulating sheet 130 and the wiring layers 110 and 120 in the IC tag shown in FIG. 1A, and each part is the same as the IC tag shown in FIG. The explanation is omitted here.
The schematic configuration of the circuit of the booster antenna unit of this example is as shown in FIG.
As in the case of the IC tag shown in FIG. 1A, capacitance portions (corresponding to C1 and C2 in FIG. 2) are formed between the planar conductor portions 116 and 126 of both wiring layers 110 and 120, The first antenna coil 111 and the second antenna coil 121 are capacitively coupled in series at one end thereof to form an LC resonance circuit for communication with an external circuit.
A caulking connection portion 180 is formed by caulking between the planar conductor portions 117 and 127.
[0018]
The planar conductor portion 126 of the second antenna coil wiring layer of the booster antenna portion wiring member shown in FIG. 3 (c) is formed with a notch portion 126a having a through hole in the cut portion. This enables wavelength adjustment (tuning).
The notch portion 126a is cut from the end portion at this portion, and when adjusting the capacitor capacity, the cutout portion 126a can be easily cut and can be used as a reference for the unit adjustment amount.
In this example, the planar conductor portions 116, 117, and 127 are not provided with notches, but of course, these may be provided with notches.
This makes it possible to finely adjust the resonance wavelength shift caused by the variation in raw material lots and the difference in manufacturing conditions.
As a notch part, what provided only the through-hole part and the half etching part other than what provided the through-hole part in the cut part, and what provided only the half etching are mentioned.
[0019]
Further, in FIG. 3B, a circular alignment mark 118 is provided. However, when mounting a semiconductor chip, for example, when mounting by a mounting device such as a flip chip bonder, the chip is mounted. After the chip is held by being included in the mounting machine, the mark 116 can be photographed to process both images, and can be mounted at an accurate position.
[0020]
In the booster antenna wiring member of this example, the planar conductors 117 and 127 can be directly connected by a method other than caulking.
For example, after forming a through hole that penetrates the insulating sheet 130 and the planar conductor portions 117 and 127, electrical conduction can be obtained by performing a vapor deposition process or the like.
[0021]
Next, the 2nd example of embodiment of the wiring member for booster antenna parts of this invention is demonstrated based on FIG.
The second example is the same as the first example except that the first wiring layer 110 shown in FIG. 3B and the second wiring layer 120 shown in FIG. The first wiring layer 510 having the first antenna coil 511 and the second wiring layer 520 having the second antenna coil 521 are replaced with the wiring layers 510 and 520 shown in FIG. Both layers are overlapped via an insulating (dielectric) sheet (not shown), and the first antenna coil 511 and the second antenna coil 521 are connected in series at one end thereof as in the first example. And a booster antenna part wiring member for an IC tag, which is capacitively coupled to each other and caulked at the other end.
In the case of the second example as well, as in the case of the first example, the coil wiring portion is the secondary of the coil-on-chip semiconductor chip for data carrier or data carrier module when the non-contact type data carrier device is manufactured. In order to be electromagnetically coupled to the coil, substantially square detours 511a and 521a are provided on one peripheral portion thereof so as to overlap the outer shape of the secondary coil. It is provided inside the coil that circulates, whereas it is provided outside.
The planar conductor portion 516 is provided with a cut portion 516a for cutting and separating in two directions.
Also in this example, as in the first example, both wiring layers have the same shape and size in the antenna coil portions, and both wiring layers are the same in the antenna coil portions except for the square detour portions 511a and 521a. Are overlapping.
About each part, it is the same as that of a 1st example, and abbreviate | omits description here.
[0022]
Next, the 3rd example of embodiment of the wiring member for booster antenna parts of this invention is demonstrated based on FIG.
The third example is the same as the first example except that the first wiring layer 110 shown in FIG. 3B and the second wiring layer 120 shown in FIG. 6 (b) is replaced with the wiring layers 610 and 620, the antenna coil 611, the first wiring layer 610 having the planar conductor portions 616 and 617, and the planar shape having no coil wiring portion. The second wiring layer 620 composed of the conductor portions 626 and 627 is overlapped with an insulating (dielectric) sheet (not shown) to overlap both layers, and capacitively coupled at one end of the antenna coil 611, and It is the wiring member for booster antenna parts for IC tags, which are caulked and connected at the other end.
Also in the case of the third example, as in the first example and the second example, the coil wiring portion (antenna coil 611) of the first wiring layer 610 is a coil when the non-contact type data carrier device is manufactured. A substantially square-shaped detour that substantially overlaps the outer periphery of the secondary coil at one peripheral portion thereof so as to be electromagnetically coupled to the secondary coil of the on-chip data carrier semiconductor chip or data carrier module 611a is provided, which is provided inside the coil that circulates, as in the second example.
In the case of the third example, the wiring width of the antenna coil 611 is wider than that of the bypass 611a and the portion connected thereto except for the bypass 611a and the portion connected thereto. This is because the bypass 611a is formed finely while keeping the resistance of the resistor at a desired value.
The planar conductor 616 is provided with a cut portion 616a for cutting and separating in two directions.
About each part, it is the same as that of a 1st example, and abbreviate | omits description here.
[0023]
In addition, in the case of the booster antenna part wiring members of the second example and the third example, the coil wiring part of the booster antenna part is used as a primary coil, as in the case of the first example. The secondary coil part of a coil-on-chip data carrier semiconductor chip or other data carrier module provided with a secondary coil for electromagnetic coupling with the secondary coil part of the booster antenna part is mounted according to the detour of the coil wiring part. Thus, a non-contact type data carrier device can be obtained.
[0024]
【Example】
In the embodiment, the booster antenna wiring member shown in FIG. 3A is used to form an IC tag shown in FIG.
This will be described with reference to FIGS. 3 (a) and 1 (a).
Hereinafter, for each part, the figure numbers corresponding to FIGS. 3A and 1A are used.
First, a booster antenna wiring member was produced as follows.
Using a base material obtained by laminating a 30 μm thick copper foil on both sides of a 25 μm thick polyethylene terephthalate film (manufactured by Toray Industries, Inc.) In addition, using a predetermined pattern plate having a pattern of the shape of the wiring layer to be formed, alignment, contact exposure, development, curing, and the copper foil portion exposed from the resist opening are removed with ferric chloride. The first antenna coil wiring layer 110, the second antenna coil portion 110, and the second antenna coil portion are substantially coincident and overlapped on both sides of a polyethylene terephthalate film that becomes an insulating sheet 130 by etching with a solution. The antenna coil wiring layer 120 was formed.
In this example, the number of turns of the antenna coil was 6, the total length of the pattern was 45 mm, and the line width of the antenna coil portion was 80 μm.
[0025]
Next, caulking was performed from the planar conductor portion 117 side using a predetermined jig to form the caulking connection portion 180.
Thus, the booster antenna wiring member shown in FIG.
[0026]
Next, on the first wiring layer 110 side of the manufactured booster antenna part wiring member, a coil-on-chip data carrier semiconductor chip (3 mm × 3 mm size) is aligned with the position of the square bypass 111a (121a). ).
The semiconductor chip has its secondary coil side (L3 in FIG. 2 (a)) side of the booster antenna part wiring member side, and heat is applied while pressing an adhesive between the first antenna coil wiring layer 110 and the semiconductor chip. In addition, it was mounted by a method of curing the adhesive.
Next, a polyethylene terephthalate film (made by Toray Industries, Inc.) having a thickness of 20 μm was laminated as upper and lower protective sheets 161 and 162 to produce a non-contact type IC tag (data carrier device).
In this way, the IC tag shown in FIG. 1A was produced.
The produced non-contact type IC tag has a frequency of 13.56 MHz, and a communication distance of about 3 cm can be obtained even when the reader / writer has a weak output.
[0027]
【The invention's effect】
A non-contact type data carrier device according to the present invention includes a booster antenna coil (primary coil) for exchanging signals with an external read / write device, a coil-on-chip type data carrier semiconductor chip or other data carrier provided with a secondary coil. This is a non-contact type data carrier device equipped with a module, which does not require high-precision processing such as through-hole processing, does not cause a decrease in yield, and booster antenna coil and secondary coil This makes it possible to provide a non-contact type data carrier device with high magnetic coupling efficiency.
This makes it possible to provide a low-cost non-contact data carrier device.
[Brief description of the drawings]
FIG. 1 (a) is a schematic cross-sectional view of an example of an embodiment of a non-contact type data carrier device of the present invention, and FIG. 1 (b) is viewed from the A1-A2 side of FIG. 1 (a). FIG. 1C is a schematic diagram of the first coil wiring layer, FIG. 1C is a schematic diagram of the second coil wiring layer viewed from the A3-A4 side in FIG. 1A, and FIG. 1D is a square detour. It is the figure which showed the road part.
FIG. 2 (a) is an overall schematic circuit diagram of the non-contact data carrier device shown in FIG. 1 (a), and FIG. 2 (b) shows an example of the configuration of a coil-on-chip type semiconductor chip. It is a figure.
FIG. 3 (a) is a schematic cross-sectional view of a first example of an embodiment of a wiring member for a booster antenna according to the present invention, and FIG. 3 (b) is a B1-B2 side of FIG. 3 (a). 3C is a schematic view of the first coil wiring layer as viewed from the side, FIG. 3C is a schematic view of the second coil wiring layer as viewed from the B3-B4 side in FIG. 3A, and FIG. It is a schematic circuit diagram of the wiring member for booster antenna parts shown to (a).
FIG. 4 is a diagram for explaining a data carrier device having a conventional booster antenna section and a coil-on-chip type data carrier semiconductor chip, and a coil-on-chip type data carrier semiconductor chip;
FIG. 5 (a) is a schematic diagram of a first wiring layer of a second example of the embodiment of the wiring member for the booster antenna part of the present invention, and FIG. It is the schematic of a wiring layer.
FIG. 6A is a schematic diagram of a first wiring layer of a third example of the embodiment of the wiring member for the booster antenna portion of the present invention, and FIG. It is the schematic of a wiring layer.
[Explanation of symbols]
110 First antenna coil wiring layer
111 1st antenna coil (it is also called a coil wiring part)
111a square detour part
111A (center of square detour)
116, 117 planar conductor
118 Alignment mark
120 Second antenna coil wiring layer
121 Second antenna coil (also referred to as coil wiring section)
121a Square detour part
121A Center of square detour
126, 127 Planar conductor
126a Notch
130 Insulating sheet (also called dielectric layer or simply insulating layer)
150 Semiconductor chip (also called semiconductor chip for data carrier)
161, 162 Protective sheet
180 Caulking connection
510 First wiring layer
511 First antenna coil (also referred to as a coil wiring portion)
511a Square detour part
516, 517 Planar conductor
516a Notch
518 Mark for alignment
520 Second wiring layer
521 Second antenna coil (also referred to as coil wiring portion)
521a Square detour part
526, 527 Planar conductor
528 Mark for alignment
610 First wiring layer
611 Antenna coil (also called coil wiring part)
611a Square detour part
616, 617 Planar conductor
616a Notch
618 Mark for alignment
620 Second wiring layer
626, 627 Planar conductor

Claims (6)

  1. The first wiring layer and the second wiring layer having an antenna coil in at least one of them are overlapped via a dielectric layer, both wiring layers are capacitively coupled, and both wiring layers are caulked. A directly connected booster antenna unit, and a coil-on-chip semiconductor chip for data carrier or other data carrier module provided with a secondary coil for electromagnetic coupling with the booster antenna unit as a primary coil; A non-contact type data carrier device, wherein the first wiring layer and the second wiring layer of the booster antenna unit both circulate on one plane to form an antenna coil; and Connected to the end of the coil wiring portion and provided with planar conductor portions along the antenna coil surface on the inside and outside of the antenna coil, respectively, or One of the first wiring layer and the second wiring layer is connected to the coil wiring portion that circulates on one plane to form an antenna coil, and to the end of the coil wiring portion, along the antenna coil surface, The planar conductor portions are respectively provided on the inner and outer sides of the antenna coil, the other has only the planar conductor portion, and the planar conductor portions provided on the inner and outer sides of the antenna coil are respectively Relative to the planar conductor part of the other wiring layer, one of them forms a capacitive part between the planar conductor parts of both wiring layers, and both wiring layers are capacitively coupled, and the other is both wirings The planar conductor portions of the layers are squeezed together and the antenna coil of the wiring layer is along the outer shape of the secondary coil of the data carrier semiconductor chip or other data carrier module at one peripheral portion thereof. Almost on top of this Provided a bypass path for bypassing a substantially rectangular shape, the non-contact data carrier device being characterized in that it is formed by electromagnetically coupling with said secondary coil on the said semiconductor chip or other data carrier module.
  2. The non-contact type data carrier device according to claim 1, wherein both the first wiring layer and the second wiring layer of the booster antenna unit circulate on one plane to form an antenna coil; A planar conductor portion connected to the end of the coil wiring portion and along the antenna coil surface is provided inside and outside the antenna coil, respectively, and the detour portion of the first antenna coil The non-contact type data carrier device, wherein the second antenna coil has the same shape and the same size as each other, and substantially overlaps with each other.
  3. The non-contact type data carrier device according to claim 1, wherein the non-contact type data carrier device is a non-contact IC tag or a non-contact IC card.
  4.   Coil-on-chip semiconductor chip for data carrier or coil of other data carrier module is used as a secondary coil, and a booster antenna part which is a primary coil for electromagnetic coupling with this is formed. , A booster antenna wiring member, wherein at least one of the first wiring layer having an antenna coil and the second wiring layer are overlapped via a dielectric layer, and both wiring layers are capacitively coupled In addition, the first and second wiring layers of the booster antenna section are both directly connected by caulking between the wiring layers, and both of the first wiring layer and the second wiring layer circulate on one plane to form an antenna coil. And a planar conductor portion that is connected to the end of the coil wiring portion and along the antenna coil surface is provided on the inner side and the outer side of the antenna coil, respectively. Or one of the first wiring layer and the second wiring layer is connected to the coil wiring portion that circulates on one plane to form the antenna coil, and to the end portion of the coil wiring portion. Planar conductor portions along the plane are provided on the inside and outside of the antenna coil, respectively, and the other has only the planar conductor portion and is provided on the inside and outside of the antenna coil. Each of the conductor portions is opposed to the planar conductor portion of the other wiring layer, one of which forms a capacitive portion between the planar conductor portions of both wiring layers, and capacitively couples both wiring layers, On the other hand, the planar conductors of both wiring layers are caulked to make the coil wiring part a coil-on-chip data carrier semiconductor chip or data when a non-contact type data carrier device is manufactured. Secondary coil of carrier module As electromagnetically coupled, on one peripheral portion, the booster antenna unit interconnection member, characterized in that is provided with the overlapped with each other substantially square-shaped detour substantially thereto along the outer shape of the secondary coil.
  5. 5. The booster antenna part wiring member according to claim 4 , wherein the first wiring layer and the second wiring layer are externally processed by etching.
  6. The booster antenna part wiring member according to any one of claims 4 to 5, wherein at least one of the planar conductor parts to be capacitively coupled of the first wiring layer or the second wiring layer, A wiring member for a booster antenna part, characterized in that a cut part for changing the area is formed by providing a half-etched part and / or a through-hole part.
JP2000372593A 2000-12-07 2000-12-07 Non-contact data carrier device and wiring member for booster antenna Expired - Fee Related JP4641096B2 (en)

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