JP6082252B2 - Non-contact type data receiving / transmitting body, disk-shaped recording medium - Google Patents

Description

The present invention, non-contact type data reception and transmission body having an antenna for use in a non-contact type data reception and transmission body which is attached to the disc-shaped recording medium such as a CD and a DVD, and includes a non-contact type data reception and transmission body The present invention relates to a disc-shaped recording medium.

 A non-contact type data receiving / transmitting body for RFID (Radio Frequency IDentification) may be attached to the disk-shaped recording medium for the purpose of taking-out prevention or inventory management. Although the disc-shaped recording medium has a non-conductive portion, a vapor-deposited metal portion, and a recording surface metal portion, since the area of the non-conductive portion is small, a non-contact type data receiver / transmitter is placed on the disc-shaped recording medium. When attached, there is a problem that the communication distance is shortened and is not suitable for practical use.

 Therefore, conventionally, an antenna used for a non-contact type data transmitting / receiving body has an annular conductive plate, and the conductive plate is connected to the IC chip, and the conductive plate is based on the power supply portion. There has been proposed one having a circular slot that is provided on the inner peripheral side along the outer shape and penetrates the conductive plate in the thickness direction (see, for example, Patent Document 1). In this antenna, the conductive plate is disposed so as to face the vapor deposition metal part and the recording surface metal part of the recording medium, and the electromagnetic characteristics are established between the conductive plate, the vapor deposition metal part and the recording surface metal part, thereby providing communication characteristics. Mitigating the decrease in (communication distance).

JP 2011-155627 A

 However, the antenna described in Patent Document 1 has a short communication distance when mounted on a recording medium, and does not provide sufficient characteristics for use in applications such as preventing the recording medium from being taken out. It was desired to improve. Moreover, in order to mount an IC chip on an antenna, a thermosetting anisotropic conductive adhesive is generally used, but when the area of a conductive plate is large as in the antenna described in Patent Document 1, There was a problem that it was easy to dissipate heat and the anisotropic conductive adhesive was difficult to cure. Therefore, if the temperature of the hot pressure head when mounting the IC chip is raised, the anisotropic conductive adhesive can be cured, but not only the heat tends to become unstable due to heat radiation from the conductive plate, The amount of heat applied to the substrate of the IC chip and the antenna also increases, and as a result, there is a problem that the substrate of the IC chip and the antenna deteriorates due to the heat.

 The present invention has been made in view of the above circumstances, and includes an antenna that suppresses heat radiation from a conductive plate, a non-contact type data receiver / transmitter including the antenna, and a non-contact type data receiver / transmitter. An object is to provide a disc-shaped recording medium.

The non-contact type data transmitting / receiving body of the present invention has a first area on the inner peripheral side made of a non-conductive member and a second area made of a non-conductive member and a conductive member and surrounding the first area. The second region is an annular conductive plate used in a non-contact type data receiving / transmitting body attached to a disk-shaped recording medium composed of a conductive portion made of a conductive member and an insulating portion made of a non-conductive member. a non-contact type data reception and transmission body having an antenna wherein the conductive plate is based on a through hole penetrating in the thickness direction in the center thereof, and a feeding unit connected to the IC chip, the power feeding unit Provided on the inner periphery side of the conductive plate along the outer periphery of the through-hole, penetrates the conductive plate in the thickness direction, and part of the ring is blocked by the conductive plate, and part of the ring is not A substantially annular slot in plan view with a continuous portion , and surrounding the slot; A plurality of arc-shaped air gaps in plan view that are provided at equal intervals along the outer periphery of the slot and penetrate the conductive plate in the thickness direction, and two adjacent air gaps among the air gaps, A conductive portion provided at equal intervals along the outer periphery of the slot, and the conductive plate is at least partially partially mounted when the non-contact type data transmitting / receiving body is attached to the disk-shaped recording medium. An antenna facing a conductive portion made of the conductive member constituting the second area of the disc-shaped recording medium, and an IC chip electrically connected to the antenna.

In the non-contact type data transmitting / receiving body of the present invention, it is preferable that the inner periphery of the conductive portion made of the conductive member is disposed outside the inner periphery of the slot.

 The disc-shaped recording medium of the present invention has a disc-shaped recording medium having a first region on the inner circumference side made of a non-conductive member, and a second region made of a non-conductive member and a conductive member and surrounding the first region. A medium, characterized in that the non-contact type data receiving / transmitting body of the present invention is attached.

 According to the present invention, the conductive plate is provided on the inner peripheral side along the outer shape of the conductive plate, surrounds the slot penetrating the conductive plate in the thickness direction, and is provided at intervals along the outer shape of the conductive plate. Since a plurality of air gaps penetrating in the thickness direction are provided, heat radiation from the conductive plate can be suppressed, so that anisotropic conduction can be achieved without increasing the temperature of the hot pressure head when mounting the IC chip on the antenna. The amount of heat necessary for curing the adhesive can be secured, and the IC chip and the antenna substrate can be prevented from being deteriorated by heat from the hot-pressing head.

It is the schematic which shows 1st embodiment of this invention, (a) is a top view, (b) is sectional drawing which follows the AA line of (a). It is a schematic plan view which shows one Embodiment of the non-contact-type data transmission / reception body of this invention. It is a schematic plan view which shows 2nd embodiment of this invention. It is a schematic plan view which shows 3rd embodiment of this invention. It is a schematic plan view which shows 4th embodiment of this invention. It is the schematic which shows 5th embodiment of this invention, (a) is a top view, (b) is sectional drawing which follows the BB line of (a). It is the schematic which shows 6th embodiment of this invention, (a) is a top view, (b) is sectional drawing which follows the CC line of (a).

Embodiments of an antenna of the present invention, a non-contact type data receiving / transmitting body including the antenna, and a disk-shaped recording medium including the non-contact type data receiving / transmitting body will be described.
Note that this embodiment is specifically described in order to better understand the gist of the invention, and does not limit the present invention unless otherwise specified.

(1) First Embodiment FIGS. 1A and 1B are schematic views showing a first embodiment of the present invention, in which FIG. 1A is a plan view and FIG. 1B is a sectional view taken along line AA in FIG. . FIG. 1 shows a state where the antenna is attached to a disk-shaped recording medium.
In the present embodiment, the antenna 10 includes an annular conductive plate 11 used for a non-contact type data receiving / transmitting body attached to the disk-shaped recording medium 20.

The disc-shaped recording medium 20 is provided with a through hole 21 penetrating in the thickness direction at the center thereof. The disk-shaped recording medium 20 is made of a non-conductive member, and includes a first region 22 on the inner peripheral side (through hole 21 side), a non-conductive member and a conductive member, and a first region 22 surrounding the first region 22. And two regions 23.
As shown in FIG. 1B, the second region 23 is provided so as to sandwich the conductive portion 24 between the conductive portion 24 made of a conductive member and the conductive portion 24, and the first region 22. It is comprised from the insulation part 25 (25A, 25B) which consists of the same nonelectroconductive member as what comprises. That is, the second region 23 is a laminated body composed of the conductive portion 24 and the insulating portions 25A and 25B. Further, the conductive portion 24 is disposed on the inner peripheral side (through hole 21 side), and includes a non-recording area 24A that does not record a signal and a recording area 24B that is disposed so as to surround the non-recording area 24A and record a signal. Have.
Specific examples of the disk-shaped recording medium 20 having such a configuration include a CD and a DVD.
As the disc-shaped recording medium 20, the second area 23 is exemplified by the conductive portion 24 and the insulating portion 25 (25A, 25B) provided on both sides of the conductive portion 24. However, the present invention is not limited to this. In the present invention, the disc-shaped recording medium may be configured such that the second region includes an insulating portion and a conductive portion provided on one surface side thereof.

As the nonconductive member constituting the insulating portion 25 of the first region 22 and the second region 23, generally, polycarbonate, amorphous polyolefin (APO), glass or the like can be cited.
Generally as an electroconductive member which comprises the electroconductive part 24 of the 2nd area | region 23, an aluminum vapor deposition film, a silver vapor deposition film, etc. are mentioned.

 The conductive plate 11 of the antenna 10 is provided with a through hole 12 penetrating in the thickness direction at the center thereof. The through hole 12 is provided so as to correspond to the through hole 21 of the disk-shaped recording medium 20 when the antenna 10 is attached to the disk-shaped recording medium 20. In other words, the diameter of the through hole 12 of the conductive plate 11 is larger than the diameter of the through hole 21 of the disk-shaped recording medium 20, and when the antenna 10 is attached to the disk-shaped recording medium 20, The through hole 12 and the through hole 21 of the disc-shaped recording medium 20 are not overlapped.

 The conductive plate 11 is provided on the inner peripheral side (through hole 12 side) along the outer shape of the conductive plate 11 with the power supply unit 13 connected to the IC chip and the power supply unit 13 as a base end. A slot 14 having a substantially annular shape in plan view and penetrating the conductive plate 11 in the thickness direction. The slot 14 surrounds the slot 14 and is provided at intervals along the outer shape of the conductive plate 11 and penetrates the conductive plate 11 in the thickness direction. Void 15 (15A to 15L). Here, the slot 14 having a substantially circular shape in plan view means that a part of the ring is blocked by the conductive plate 11 and a discontinuous part exists in a part of the slot 14.

The slot 14 is provided along substantially the entire circumference of the through-hole 12 with the power feeding portion 13 as a base end.
The gaps 15 </ b> A to 15 </ b> L are provided at substantially equal intervals along the outer shape of the conductive plate 11 (along the outer periphery of the slot 14) clockwise with respect to the gap 15 </ b> A in the vicinity of the power feeding unit 13. The gaps 15 </ b> A to 15 </ b> L are openings provided in the conductive plate 11 so as to surround the slot 14.

 In addition, between the gaps 15A to 15L, the conductive portions are arranged at substantially equal intervals along the outer shape of the conductive plate 11 (along the outer periphery of the slot 14) clockwise with respect to the portion corresponding to the power supply unit 13. The part 16 (16A-16L) is provided. In other words, the portion corresponding to the power supply unit 13 is set to 0 o'clock (12 o'clock), clockwise, the conductive portion 16A at the position of 0 o'clock (12 o'clock), the conductive portion 16B at the position of 1 o'clock, and the position at 2 o'clock. Conductive portion 16C, conductive portion 16D at 3 o'clock position, conductive portion 16E at 4 o'clock position, conductive portion 16F at 5 o'clock position, conductive portion 16G at 6 o'clock position, conductive portions 16H, 8 at 7 o'clock position The conductive portion 16I is provided at the hour position, the conductive portion 16J at the 9 o'clock position, the conductive portion 16K at the 10 o'clock position, and the conductive portion 16L at the 11 o'clock position.

Further, as shown in FIG. 1B, the conductive plate 11 is configured such that when the antenna 10 is attached to the disc-shaped recording medium 20, the non-recording of the conductive portion 24 constituting the second region 23 of the disc-shaped recording medium 20 is performed. The region 24A is opposed to the region 24A. The conductive plate 11 and the non-recording area 24A of the conductive portion 24 constituting the second area 23 of the disc-shaped recording medium 20 are opposed to each other when the antenna 10 is attached to the disc-shaped recording medium 20 in plan view. In this case, the conductive plate 11 and the non-recording area 24A of the conductive portion 24 constituting the second area 23 of the disc-shaped recording medium 20 are overlapped. In FIG. 1B, the area indicated by the symbol α is an area where the conductive plate 11 and the non-recording area 24 </ b> A of the conductive portion 24 constituting the second area 23 of the disc-shaped recording medium 20 overlap.
When the antenna 10 is attached to the disk-shaped recording medium 20, the entire conductive plate 11 needs to face the non-recording area 24 </ b> A of the conductive portion 24 that constitutes the second area 23 of the disk-shaped recording medium 20. In other words, at least a part of the conductive plate 11 only needs to face the non-recording area 24 </ b> A of the conductive portion 24 constituting the second area 23 of the disc-shaped recording medium 20.

The outer diameter of the conductive plate 11 is not particularly limited, but is, for example, 25 mm to 50 mm because it is attached to a disc-shaped recording medium 20 made of a general CD or DVD.
In addition, the diameter (inner diameter) of the through hole 12 of the conductive plate 11 is not particularly limited, but is attached to a disc-shaped recording medium 20 made of a general CD, DVD, or the like. It is.

The width of the slot 14 is not particularly limited, but is, for example, 2 mm to 4 mm.
Further, when the aperture ratio of the slot 14, that is, when the conductive plate 11 has no holes other than the through-holes 12 and has a plate shape on one side, the area of the plate is 100%. In this case, the area ratio occupied by the slot 14 is, for example, 10% to 20%.

Although the width | variety of the space | gap 15 is not specifically limited, For example, they are 1 mm-3 mm.
Further, when the aperture ratio of the gap 15, that is, when the conductive plate 11 is not provided with a hole other than the through-hole 12 and has a plate shape on one side, the area of the plate is 100%. In this case, the area ratio occupied by the gap 15 is, for example, 15% to 20%. Note that the aperture ratio of the gap 15 is appropriately adjusted according to the heat dissipation and communication distance required for the antenna 10.

 As the conductive plate 11, a metal plate made of silver, gold, platinum, copper, aluminum, or the like, or one surface of an insulating base material, such as screen printing or ink jet printing in a predetermined pattern using a polymer type conductive ink. One having a conductive part formed by a printing method, one having a conductive part formed by etching a conductive foil adhered to one side of an insulating base, and one side of the insulating base being metal-plated Examples thereof include those having a conductive portion made of metal plating.

 Examples of insulating base materials include base materials made of polyester resins such as polyethylene terephthalate (PET), glycol-modified polyethylene terephthalate (PET-G), polybutylene terephthalate (PBT), and polyethylene naphthalate (PEN); polyethylene (PE) Base material made of polyolefin resin such as polypropylene (PP); Base material made of polyfluorinated ethylene resin such as polyvinyl fluoride, polyvinylidene fluoride, polytetrafluoroethylene; Polyamide resin such as nylon 6, nylon 6,6 A substrate made of a vinyl polymer such as polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer, polyvinyl alcohol, vinylon; polymethyl methacrylate, polyethyl methacrylate, polyethyl acrylate, polyacrylic Base material made of acrylic resin such as butyl phosphate; Base material made of polystyrene; Base material made of polycarbonate (PC); Base material made of polyarylate; Base material made of polyimide; Fine paper, thin paper, glassine paper, sulfuric acid Examples thereof include a substrate made of paper such as paper.

 Examples of polymer-type conductive inks are those in which conductive fine particles such as silver powder, gold powder, platinum powder, aluminum powder, palladium powder, rhodium powder, carbon powder (carbon black, carbon nanotube, etc.) are blended in the resin composition Is mentioned.

If a thermosetting resin is used as the resin composition, the polymer-type conductive ink has a thermosetting type capable of forming a coating film forming a conductive portion of the conductive plate 11 at 200 ° C. or less, for example, about 100 to 150 ° C. Become. A path through which electricity of the coating film forming the conductive portion of the conductive plate 11 flows is formed when the conductive fine particles constituting the coating film contact each other, and the resistance value of this coating film is on the order of 10 ⁻⁵ Ω · cm.
Further, as the polymer type conductive ink in the present invention, known ones such as a photocuring type, a penetrating drying type, and a solvent volatilization type are used in addition to the thermosetting type.

 The photocurable polymer type conductive ink contains a photocurable resin in the resin composition and has a short curing time, so that the production efficiency can be improved. Examples of the photocurable polymer type conductive ink include, for example, a thermoplastic resin alone, or a conductive resin fine particle in a blend resin composition of a thermoplastic resin and a crosslinkable resin (particularly, a crosslinkable resin made of polyester and isocyanate). 60% by mass or more and a polyester resin of 10% by mass or more, that is, a solvent volatile type or a crosslinked / thermoplastic combined type (however, the thermoplastic type is 50% by mass or more), heat Polyester resin alone or a blend resin composition of a thermoplastic resin and a crosslinkable resin (especially a crosslinkable resin composed of polyester and isocyanate) is blended with 10% by mass or more of a polyester resin, that is, a crosslinked type or A cross-linking / thermoplastic combination type is preferably used.

Examples of the conductive foil that forms the conductive portion of the conductive plate 11 include copper foil, silver foil, gold foil, platinum foil, and aluminum foil.
Furthermore, examples of the metal plating that forms the conductive portion of the conductive plate 11 include copper plating, silver plating, gold plating, and platinum plating.

As shown in FIG. 2, an IC chip 31 is mounted on the power feeding unit 13 of the antenna 10, so that the antenna 10 and the IC chip 31 are electrically connected via the power feeding point 13. A transmitter 40 is obtained.
In order to mount the IC chip 31 on the power feeding portion 13 of the antenna 10, an anisotropic conductive adhesive or the like is used.

According to the antenna 10, it is provided on the inner peripheral side along the outer shape of the conductive plate 11, surrounds the slot 14 that penetrates the conductive plate 11 in the thickness direction, and is provided at intervals along the outer shape of the conductive plate 11. Since the plurality of gaps 15 penetrating the conductive plate 11 in the thickness direction are provided, the heat radiation from the conductive plate 11 can be suppressed. Therefore, when the IC chip 31 is mounted on the antenna 10, the temperature of the hot press head Even if the anisotropic conductive adhesive is not increased, the amount of heat necessary for curing the anisotropic conductive adhesive can be secured, and the base material of the IC chip 31 and the antenna 10 can be prevented from being deteriorated by the heat from the hot press head. .
Further, when the antenna 10 is attached to the disc-shaped recording medium 20, the conductive plate 11 faces the non-recording area 24 </ b> A of the conductive portion 24 that constitutes the second area 23 of the disc-shaped recording medium 20. Therefore, electromagnetic coupling occurs between the conductive plate 11 and the non-recording area 24A of the conductive portion 24 that constitutes the second area 23 of the disc-shaped recording medium 20, so that the front of the antenna 10 (FIG. 1A and FIG. The communication distance from the paper surface direction in FIG. 2 can be increased by 20 to 30% compared to the case where the antenna 10 is used alone.

 The antenna 10 and the non-contact type data receiving / transmitting body 40 including the antenna 10 are separate from the disk-shaped recording medium 20 and have a wireless communication function by themselves. The antenna 10 or the non-contact type data receiver / transmitter 40 is recorded in a disc shape so that the conductive plate 11 of the antenna 10 faces the non-recording region 24A of the conductive portion 24 constituting the second region 23 of the disc-shaped recording medium 20. By attaching to the medium 20, the communication distance of the antenna 10 can be improved as described above.

 Moreover, although the case where the 12 air gaps 15 (15A-15L) were provided in the electrically conductive plate 11 of the antenna 10 was illustrated in this embodiment, this invention is not limited to this. In the present invention, the number and interval of the gaps are appropriately adjusted according to the heat dissipation and communication distance required for the antenna. For example, the gaps of the conductive plate are the same as those of the second embodiment described later. It may be provided as follows.

(2) Second Embodiment FIG. 3 is a schematic plan view showing a second embodiment of the present invention.
In the present embodiment, the antenna 50 includes an annular conductive plate 51 used for the non-contact type data receiving / transmitting body attached to the disk-shaped recording medium 20 described above.

 The conductive plate 51 of the antenna 50 is provided with a through hole 52 penetrating in the thickness direction at the center thereof. The diameter of the through hole 52 of the conductive plate 51 is larger than the diameter of the through hole 21 of the disk-shaped recording medium 20, and when the antenna 50 is attached to the disk-shaped recording medium 20, the through hole 52 of the conductive plate 51. And the through hole 21 of the disc-shaped recording medium 20 do not overlap.

 The conductive plate 51 is provided on the inner peripheral side (through hole 52 side) along the outer shape of the conductive plate 51 with the power supply portion 53 connected to the IC chip and the power supply portion 53 as a base end. A slot 54 having a substantially annular shape in plan view that penetrates the conductive plate 51 in the thickness direction, and four slots that surround the slot 54 and are spaced along the outer shape of the conductive plate 51 and penetrate the conductive plate 51 in the thickness direction. Voids 55 (55A to 55D). Here, the slot 54 having a substantially annular shape in plan view means that a part of the ring is blocked by the conductive plate 51 and a discontinuous part exists in a part of the slot 54.

The slot 54 is provided along the substantially entire circumference of the through hole 52 with the power feeding portion 53 as a base end.
The gaps 55 </ b> A to 55 </ b> D are provided at substantially equal intervals along the outer shape of the conductive plate 51 (along the outer periphery of the slot 54) clockwise with respect to the gap 55 </ b> A in the vicinity of the power feeding portion 53.

 Further, between the gaps 55A to 55D, the conductive portions are arranged at regular intervals along the outer shape of the conductive plate 51 (along the outer periphery of the slot 54) clockwise with respect to the portion corresponding to the power feeding portion 53. The part 56 (56A-56D) is provided. In other words, the portion corresponding to the power feeding portion 53 is set to 0 o'clock (12 o'clock), clockwise, the conductive portion 56A at the o'clock (12 o'clock) position, the conductive portion 56B at the 3 o'clock position, and the position at 6 o'clock. A conductive portion 56D is provided at the position of the conductive portion 56C, 9 o'clock.

 Similarly to the first embodiment described above, when the antenna 50 is attached to the disc-shaped recording medium 20, the conductive plate 51 has at least a part of the conductive plate 51 serving as the second region 23 of the disc-shaped recording medium 20. It is configured to face the non-recording area 24A of the conductive part 24 that constitutes the conductive part 24.

The outer diameter of the conductive plate 51 is not particularly limited, but is, for example, 25 mm to 50 mm because it is attached to the disc-shaped recording medium 20 made of a general CD or DVD.
In addition, the diameter (inner diameter) of the through hole 52 of the conductive plate 51 is not particularly limited, but is attached to the disc-shaped recording medium 20 made of a general CD, DVD, or the like. It is.

The width of the slot 54 is not particularly limited, but is, for example, 2 mm to 4 mm.
Further, when the aperture ratio of the slot 54, that is, when the conductive plate 51 is not provided with a hole other than the through hole 52 and has a plate shape on one side, the area of the plate is 100%. In this case, the area ratio occupied by the slot lot 54 is, for example, 10% to 20%.

Although the width | variety of the space | gap 55 is not specifically limited, For example, they are 1 mm-3 mm.
Further, when the aperture ratio of the gap 55, that is, when the conductive plate 51 is not provided with a hole other than the through hole 52 and has a plate shape on one side, the area of the plate is 100%. In this case, the area ratio occupied by the gap 55 is, for example, 15% to 20%. Note that the aperture ratio of the gap 55 is appropriately adjusted according to the heat dissipation and communication distance required for the antenna 50.

 As the conductive plate 51, the same one as the conductive plate 11 of the first embodiment described above is used.

 According to the antenna 50, the same effect as the antenna 10 in the first embodiment described above can be obtained.

(3) Third Embodiment FIG. 4 is a schematic plan view showing a third embodiment of the present invention.
In FIG. 4, the same components as those of the antenna 10 shown in FIG.
In the present embodiment, the antenna 50 is different from the antenna 10 in the first embodiment described above in that the conductive plate 11 has a discontinuous portion (conductive plate 11 or This is a discontinuous portion (61A to 61L) where the conductive portion of the conductive plate 11 is not provided.
The discontinuous portions 61 </ b> A to 61 </ b> L are formed so as to intersect the outer periphery of the conductive plate 11 substantially perpendicularly.

 In the present embodiment, the case where the discontinuous portions 61 </ b> A to 61 </ b> L are formed so as to intersect the outer periphery of the conductive plate 11 substantially perpendicularly is exemplified, but the present invention is not limited to this. In the present invention, the discontinuous portion may intersect the outer periphery of the conductive plate obliquely, and the discontinuous portion may have a tapered shape.

 According to the antenna 60, the same effect as the antenna 10 in the first embodiment described above can be obtained.

(4) Fourth Embodiment FIG. 5 is a schematic plan view showing a fourth embodiment of the present invention.
In the present embodiment, the antenna 70 includes an annular conductive plate 71 used for a non-contact type data receiving / transmitting body attached to the disk-shaped recording medium 20 described above.

 The conductive plate 71 of the antenna 70 is provided with a through hole 72 penetrating in the thickness direction at the center thereof. The diameter of the through hole 72 of the conductive plate 71 is larger than the diameter of the through hole 21 of the disc-shaped recording medium 20, and when the antenna 70 is attached to the disc-shaped recording medium 20, the through hole 72 of the conductive plate 71. And the through hole 21 of the disc-shaped recording medium 20 do not overlap.

 The conductive plate 71 is provided on the inner peripheral side (through hole 72 side) along the outer shape of the conductive plate 71 with the power supply unit 73 connected to the IC chip and the power supply unit 73 as a base end. A meander-shaped slot 74 penetrating the conductive plate 71 in the thickness direction, a plurality of gaps 75 surrounding the slot 74 and spaced along the outer shape of the conductive plate 71 and penetrating the conductive plate 71 in the thickness direction, It has.

The slot 74 is provided along substantially the entire circumference of the through hole 72 with the power feeding portion 73 as a base end.
The plurality of gaps 75 are provided between the meander-shaped folded portions along the outer shape of the conductive plate 71 (along the outer periphery of the slot 74), and are arranged at substantially equal intervals, and are triangular in plan view. I am doing.

 Similarly to the first embodiment described above, when the antenna 70 is attached to the disc-shaped recording medium 20, the conductive plate 71 has at least a part of the conductive plate 71 serving as the second region 23 of the disc-shaped recording medium 20. It is configured to face the non-recording area 24A of the conductive part 24 that constitutes the conductive part 24.

The outer diameter of the conductive plate 71 is not particularly limited, but is, for example, 25 mm to 50 mm because it is attached to the disc-shaped recording medium 20 made of a general CD or DVD.
Further, the diameter (inner diameter) of the through hole 72 of the conductive plate 71 is not particularly limited, but is attached to the disc-shaped recording medium 20 made of a general CD, DVD, or the like, and, for example, 16 mm to 23 mm. It is.

The width of the slot 74 is not particularly limited, but is, for example, 0.5 mm to 1 mm.
Further, when the aperture ratio of the slot 74, that is, when the conductive plate 71 is not provided with a hole other than the through hole 72 and has a plate shape on one side, the area of the plate is 100%. In this case, the area ratio occupied by the slot lot 74 is, for example, 10% to 20%.

Although the width | variety of the space | gap 75 is not specifically limited, For example, they are 1 mm-2 mm.
Further, when the aperture ratio of the gap 75, that is, when the conductive plate 71 is not provided with a hole other than the through hole 72 and has a plate shape on one side, the area of the plate is 100%. In this case, the area ratio occupied by the gap 75 is, for example, 15% to 20%. Note that the aperture ratio of the gap 75 is appropriately adjusted according to the heat dissipation and communication distance required for the antenna 70.

 As the conductive plate 71, the same one as the conductive plate 11 of the first embodiment described above is used.

 According to the antenna 70, the same effect as the antenna 10 in the first embodiment described above can be obtained.

(5) Fifth Embodiment FIGS. 6A and 6B are schematic views showing a fifth embodiment of the present invention, in which FIG. 6A is a plan view and FIG. 6B is a cross-sectional view taken along line BB in FIG. . FIG. 6 shows a state where the antenna is attached to the disc-shaped recording medium.
In FIG. 6, the same components as those of the antenna 10 shown in FIG.
In the present embodiment, the configuration of the disc-shaped recording medium 80 to which the antenna 10 is attached is different from that in the first embodiment.

The disc-shaped recording medium 80 is provided with a through hole 81 penetrating in the thickness direction at the center thereof. The disc-shaped recording medium 80 is made of a non-conductive member, and includes a first region 82 on the inner peripheral side (through hole 81 side), a non-conductive member and a conductive member, and a first region 82 surrounding the first region 82. And two regions 83.
As shown in FIG. 6B, the second region 83 is provided so as to sandwich the conductive portion 84 between the conductive portion 84 made of a conductive member and the conductive portion 84 on both sides of the conductive portion 84. It is comprised from the insulation part 85 (85A, 85B) which consists of the same nonelectroconductive member as what comprises. In other words, the second region 83 is a laminated body including the conductive portion 84 and the insulating portions 85A and 85B. Furthermore, the conductive portion 84 is disposed on the inner peripheral side (through hole 81 side), and is disposed so as to surround the non-recording area 84A where no signal is recorded, and the recording area (not shown) where the signal is recorded. ).
Specific examples of the disc-shaped recording medium 80 having such a configuration include, for example, optical media such as CD-R, DVD-R, CD-RW, and DVD-RW that can be additionally written, erased, and rewritten.
As the disk-shaped recording medium 80, the second area 83 is exemplified by the conductive portion 84 and the insulating portion 85 (85A, 85B) provided on both sides of the conductive portion 84. However, the present invention is not limited to this. In the present invention, the disc-shaped recording medium may be configured such that the second region includes an insulating portion and a conductive portion provided on one surface side thereof.

As the non-conductive member constituting the insulating portion 85 of the first area 82 and the second area 83, the same ones as those of the disk-shaped recording medium 20 described above can be cited.
Examples of the conductive member constituting the conductive portion 24 of the second area 23 include the same members as those of the disk-shaped recording medium 20 described above.

 Further, when the antenna 10 is attached to the disk-shaped recording medium 80, the through hole 12 of the conductive plate 11 and the through hole 81 of the disk-shaped recording medium 80 do not overlap.

 As shown in FIG. 6B, when the antenna 10 is attached to the disc-shaped recording medium 80, the conductive plate 11 has an outer edge portion that forms the second region 83 of the disc-shaped recording medium 80. It faces the inner edge of the non-recording area 84A. When the outer edge portion of the conductive plate 11 and the inner edge portion of the non-recording area 84A of the conductive portion 84 constituting the second area 83 of the disc-shaped recording medium 80 face each other, the antenna 10 is attached to the disc-shaped recording medium 80. Thus, when these are viewed in plan, it means that the outer edge portion of the conductive plate 11 and the inner edge portion of the non-recording area 84A of the conductive portion 84 constituting the second area 83 of the disc-shaped recording medium 80 overlap. In FIG. 6B, the area indicated by the symbol β overlaps the outer edge of the conductive plate 11 and the inner edge of the non-recording area 84A of the conductive part 84 constituting the second area 83 of the disc-shaped recording medium 80. It is an area.

According to this embodiment, the same effect as the first embodiment described above can be obtained.
Further, when the antenna 10 is attached to the disk-shaped recording medium 80, the outer edge portion of the conductive plate 11 and the inner edge portion of the non-recording area 84A of the conductive portion 84 constituting the second area 83 of the disk-shaped recording medium 80 overlap. Therefore, since the power feeding part 13 (the part where the IC chip is mounted) of the conductive plate 11 and the conductive part 84 do not overlap, the circuit of the IC chip and the conductive part 84 caused by the unstable mounting of the IC chip. There is no risk of capacitive coupling between the two, and yield reduction can be suppressed.

(6) Sixth Embodiment FIGS. 7A and 7B are schematic views showing a sixth embodiment of the present invention, in which FIG. 7A is a plan view and FIG. 7B is a cross-sectional view taken along line CC in FIG. . FIG. 7 shows a state where the antenna is attached to the disc-shaped recording medium.
In FIG. 7, the same components as those of the antenna 10 shown in FIG.
In the present embodiment, the configuration of the disc-shaped recording medium 90 to which the antenna 10 is attached is different from that in the first embodiment.

The disc-shaped recording medium 90 is provided with a through hole 91 penetrating in the thickness direction at the center thereof. The disc-shaped recording medium 90 is made of a non-conductive member, and includes a first region 92 on the inner peripheral side (through hole 91 side), a non-conductive member and a conductive member, and a first region 92 surrounding the first region 92. And two regions 93.
As shown in FIG. 7B, the second region 93 is provided so as to sandwich the conductive portion 94 between the conductive portion 94 made of a conductive member and the conductive portion 94 on both sides of the conductive portion 94. The insulating part 95 (95A, 95B) which consists of the same nonelectroconductive member as what comprises is comprised. That is, the second region 93 is a laminated body including the conductive portion 94 and the insulating portions 95A and 95B. Further, the conductive portion 94 is disposed on the inner peripheral side (through hole 91 side), and includes a non-recording area 94A that does not record a signal and a recording area 94B that is disposed so as to surround the non-recording area 94A and record a signal. Have.
Specific examples of the disk-shaped recording medium 90 having such a configuration include a CD and a DVD.
As the disk-shaped recording medium 90, the second region 93 is exemplified by the conductive portion 94 and the insulating portion 95 (95A, 95B) provided on both sides of the conductive portion 94. However, the present invention is not limited to this. In the present invention, the disc-shaped recording medium may be configured such that the second region includes an insulating portion and a conductive portion provided on one surface side thereof.

As the non-conductive member constituting the insulating portion 95 of the first region 92 and the second region 93, the same material as that of the disk-shaped recording medium 20 described above can be used.
Examples of the conductive member constituting the conductive portion 94 of the second area 93 include the same members as those of the above-described disk-shaped recording medium 20.

 Further, when the antenna 10 is attached to the disk-shaped recording medium 90, the through hole 12 of the conductive plate 11 and the through hole 91 of the disk-shaped recording medium 90 do not overlap.

 As shown in FIG. 7B, when the antenna 10 is attached to the disk-shaped recording medium 90, the conductive plate 11 is a non-recording area 94A of the conductive portion 94 that constitutes the second area 93 of the disk-shaped recording medium 90. In addition, it faces the recording area 94B. When the conductive plate 11 and the non-recording area 94A and the recording area 94B of the conductive portion 94 constituting the second area 93 of the disk-shaped recording medium 90 face each other, the antenna 10 is attached to the disk-shaped recording medium 90. When these are viewed in plan, the conductive plate 11 overlaps the entire non-recording area 94A of the conductive portion 94 and the partial area of the recording area 94B that constitute the second area 93 of the disc-shaped recording medium 90. say. In FIG. 7B, the area indicated by the symbol γ is the entire area of the non-recording area 94A of the conductive plate 11 and the conductive part 94 constituting the second area 93 of the disc-shaped recording medium 90 and a partial area of the recording area 94B. It is the area where and overlap.

According to the present embodiment, the same effects as those of the first embodiment described above can be obtained, but the antenna 10 needs to be attached to the surface of the disc-shaped recording medium 90 opposite to the reading surface. By attaching the antenna 10 in this way, communication with the antenna 10 becomes possible.
Further, when the antenna 10 is attached to the disk-shaped recording medium 90, the conductive plate 11 and the entire non-recording area 94A of the conductive portion 94 constituting the second area 93 of the disk-shaped recording medium 90 overlap. 11 and the non-recording area 94A of the conductive portion 94 constituting the second area 93 of the disc-shaped recording medium 90 are widened. As a result, the communication distance of the antenna 10 can be improved.

DESCRIPTION OF SYMBOLS 10 ... Antenna, 11 ... Conductive plate, 12 ... Through-hole, 13 ... Feeding part, 14 ... Slot, 15 ... Air gap, 16 ... Conductive part, 20 ... Disc-shaped recording medium, 21 ... through hole, 22 ... first region, 23 ... second region, 24 ... conductive portion, 24A ... non-recording region, 24B ... recording region, 25: Insulating part.

Claims (3)

A first region on the inner circumferential side made of a non-conductive member, and a second region made of a non-conductive member and a conductive member and surrounding the first region, the second region being made of a conductive member Non-contact type data transmission / reception having an antenna with an annular conductive plate used in a non-contact type data receiving / transmitting body attached to a disk-shaped recording medium composed of a conductive part and an insulating part made of a non-conductive member Body ,
The conductive plate has a through-hole penetrating in the thickness direction in the center thereof, a power feeding unit connected to the IC chip, and a base end of the power feeding unit, and an inner circumference of the conductive plate along the outer circumference of the through-hole. A substantially annular slot in plan view, which is provided on the side, penetrates the conductive plate in the thickness direction, a part of the ring is blocked by the conductive plate, and a discontinuous part exists in part , and the slot A plurality of arcuate gaps in plan view , which are provided at equal intervals along the outer periphery of the slot and penetrate the conductive plate in the thickness direction, and two adjacent gaps among the plurality of gaps. A conductive portion provided at equal intervals along the outer periphery of the slot ,
The conductive plate is a conductive portion made of the conductive member at least partially constituting the second region of the disc-shaped recording medium when the non-contact type data transmitting / receiving body is attached to the disc-shaped recording medium. A non-contact type data receiver / transmitter comprising: an antenna facing the antenna; and an IC chip electrically connected to the antenna. Contactless data reception and transmission body according to claim 1, wherein the outer side than the inner circumference of the slot, wherein the inner periphery of the conductive portion made of the conductive member is disposed. A disc-shaped recording medium having a first region on the inner circumferential side made of a non-conductive member, and a second region made of a non-conductive member and a conductive member and surrounding the first region,
3. A disc-shaped recording medium to which the non-contact type data transmitting / receiving body according to claim 1 is attached.

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