JP2006094273A - Magnetic member and antenna device using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic member used for an antenna used for a radio-communication medium such as radio-communication medium treatment equipment, an IC tag or the like together with the antenna capable of lengthening a communication distance by avoiding the effect of a peripheral metal, having excellent magnetic characteristics and having superior shock resistance and durability and an antenna device using the magnetic member. <P>SOLUTION: The magnetic member 26 uses a ceramic magnetic temporarily baked pulverulent body, a water-soluble binding agent and an oily plasticizer and has a flexibility. In the magnetic member 26, the shock resistance and the durability are improved while the magnetic characteristics of the used antenna are enhanced by forming a constitution used by an abutting or an approaching to the antenna. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a closed circuit of a magnetic field in an RF-ID, that is, an antenna used in a wireless communication medium processing apparatus that performs communication with a wireless communication medium such as an IC card or an IC tag, or an antenna mounted on the wireless communication medium itself. The present invention relates to a magnetic member that is resistant to breakage and an antenna device using the same.

  Conventionally, an antenna used for a wireless communication processing apparatus that performs communication with a wireless communication medium by an electromagnetic induction method or an antenna used for the wireless communication medium itself is affected by surrounding metal, a magnetic field becomes weak, and a mutual inductance necessary for communication. Has become a problem, and there has been a problem that the communication distance becomes short or communication becomes impossible. Therefore, in order not to be affected by the metal, the antenna and the metal are separated by a spacer or the like, or a magnetic member made of ferrite or the like is installed close to or in contact with the antenna to strengthen the magnetic field generated by the antenna. Etc. have been made.

  Here, when a spacer or the like is used, there is a problem that adjustment at the time of installation and workability related to the adjustment become complicated. Moreover, although the sintered magnetic ferrite bulk material etc. with which the magnetic member was sintered were used, there existed a problem that the crack at the time of fall and workability were inferior.

Thus, in order to provide durability against breakage while realizing strengthening of the magnetic field, for example, a device in which a flexible magnetic material is installed on the bottom surface or side surface of the antenna has been proposed (for example, Patent Document 1).
JP 2002-298095 A

  However, the flexible magnetic material shown in (Patent Document 1) is sufficient to ensure workability that can be processed into a sufficient shape in order to use sendust, permalloy, or the like of metallic magnetic powder. In a flexible magnetic body containing a large amount of such organic material, the magnetic field is not sufficiently strengthened even if it is placed in the vicinity of the antenna. There was a problem that it was insufficient for extending the communication distance of the processing device.

  In addition, a flexible magnetic body composed of metallic magnetic powder and organic material is not as good as sintered ferrite, but it has poor processability, high cost, and durability against breakage is still insufficient. There was a problem.

  Furthermore, in addition to poor workability, the insulation resistance is low, so there is a problem that it is easily affected by leakage current and the electric field from the outside world, which may cause malfunction of the antenna and the wireless communication medium processing device. .

  In addition, since the insulation resistance is low, the conductive member cannot be formed as a circuit pattern on the magnetic material, and various circuits such as a matching circuit for connecting the antenna and the processing device cannot be incorporated. There was also a problem that it was insufficient in terms of downsizing of the device.

In view of the above problems, the present invention provides a magnetic member that is soft and highly durable while realizing the magnetic field enhancement by eliminating the influence of surrounding metal in an antenna that performs communication using a magnetic field. For the purpose.

  The present invention is a flexible magnetic member using a ceramic magnetic calcined powder, a water-soluble binder, and an oily plasticizer, and is configured to be used in contact with or close to an antenna.

  The present invention is an unsintered magnetic member using a ceramic-based magnetic calcined powder, with a high filling rate of the ceramic-based magnetic calcined powder, and by making it a dense magnetic member, the magnetic properties are stable, Since the magnetic field is sufficiently strengthened and the eddy current flowing through the metal can be suppressed, the Q value of the antenna is improved and the communication distance is extended.

  In addition, by using ceramic magnetic calcined powder, methylcellulose resin as a water-soluble binder, and sorbitan monocaprylate or glycerin plastic as an oily plastic, the magnetic member has flexibility, that is, soft. It is possible to form a magnetic member that has a thickness, so that it is difficult to break, especially when it is used close to or in contact with the antenna, it is possible to improve impact resistance and durability during production, use, or transportation It becomes. In addition, the workability is improved and the load during processing is reduced, so that low cost can be realized.

  In addition, the magnetic member using ceramic-based calcined powder increases insulation resistance, making it less susceptible to leakage currents and external electric fields, and ensuring communication between antennas and wireless communication media processing devices. Can do.

  In addition, the magnetic member using the ceramic magnetic calcined powder increases the insulation resistance, so various circuits such as a matching circuit for connecting the antenna and the processing device can be incorporated on the magnetic member. There is an effect that the apparatus can be miniaturized.

  In addition, this magnetic member is difficult to dissolve in organic solvents, but it is easy to dissolve in distilled water, ion exchange water, etc., and since the dissolution surface has adhesiveness, a tape for pasting is not required. And has the effect of being able to bond.

  Furthermore, since this magnetic member has flexibility due to methylcellulose-based resin, sorbitan monocaprylate, or glycerin-based plasticizer, there is an effect that punching processing by a die press can be easily performed.

  The invention according to claim 1 of the present invention is a magnetic member having flexibility using a ceramic magnetic calcined powder, a water-soluble binder, and an oily plasticizer, and is in contact with or close to an antenna. Eddy currents flowing in metal, with a high magnetic powder filling rate and a dense magnetic member that stabilizes the magnetic properties and sufficiently strengthens the magnetic field. Since the Q value of the antenna can be improved, the communication distance can be extended, the filling rate of the magnetic powder can be improved, and it can be manufactured with equipment that does not require explosion-proof equipment, etc. The flexibility can be further improved.

  The invention according to claim 2 of the present invention is the magnetic member according to claim 1, wherein the antenna is an antenna that communicates with a wireless communication medium using a magnetic field, and the influence of surrounding metal It is possible to extend the communication distance without receiving it.

The invention according to claim 3 of the present invention is characterized in that the antenna is an antenna for a wireless communication medium processing apparatus or an antenna stored in a wireless communication medium. When the wireless communication medium processing device is a magnetic member, such as a box or a shelf, communication with high accuracy and certainty can be made possible.

  According to a fourth aspect of the present invention, the wireless communication medium processing device is an RF-ID reader / writer, and the wireless communication medium is an IC card, an IC tag, an ID card, or an ID tag. The magnetic member according to claim 3, wherein communication is possible regardless of the position and orientation of the wireless communication medium, and the recognition rate can be increased.

  The invention according to claim 5 of the present invention is the magnetic member according to any one of claims 1 to 4, wherein the antenna is a loop antenna having an opening, and the position of the wireless communication medium, A magnetic field can be applied regardless of the orientation.

  The invention according to claim 6 of the present invention is the magnetic member according to any one of claims 1 to 4, wherein the antenna is a spiral antenna, irrespective of the position and orientation of the wireless communication medium. In addition, a magnetic field can be applied.

  The invention according to claim 7 of the present invention is characterized in that the magnetic member is arranged and used on at least one of the back surface, the side surface, the bottom surface, or the top surface of the antenna. The magnetic member according to claim 1 can be an optimum antenna for use in a wireless communication medium processing device stored in a shelf or a box.

  The invention according to claim 8 of the present invention is characterized in that the ceramic-based magnetic calcined powder contains Ni-Zn-based ferrite or Mn-Zn-based ferrite. It is a magnetic member, and stable magnetic characteristics can be obtained.

The invention described in claim 9 of the present invention, a ceramic-based magnetic calcined powder _{Fe 2 O 3, ZnO, NiO} , CuO , _{or,, Fe 2 O 3, ZnO} , MnO, characterized by comprising the CuO The magnetic member according to any one of claims 1 to 8, wherein more stable magnetic characteristics can be obtained, the Q value of the antenna can be improved, and the communication distance can be extended.

  According to a tenth aspect of the present invention, in the ceramic magnetic calcined powder, the average particle size is 0.1 μm or more and 8.0 μm or less. In this magnetic member, the filling rate of the magnetic powder can be improved.

  According to an eleventh aspect of the present invention, the water-soluble binder is hydroxypropylmethylcellulose, a hydroxyethylmethylcellulose resin, or a combination thereof, and the oily plasticizer is sorbitan monocaprylate or glycerin plastic. It is a magnetic member of any one of Claims 1-10 characterized by being a material or these combination, Comprising: A magnetic member can maintain moderate softness | flexibility.

  The invention according to claim 12 of the present invention is characterized in that hydroxypropylmethylcellulose or hydroxyethylmethylcellulose-based resin is contained in an amount of 2 to 10% by weight based on the ceramic magnetic powder. It is a magnetic member of description, Comprising: The shape retention property of a magnetic member can be improved.

  The invention according to claim 13 of the present invention is characterized in that sorbitan monocaprylate or glycerin plasticizer is contained in an amount of 3 to 15% by weight based on the ceramic magnetic powder. It is a magnetic member in any one of thru | or 12, Comprising: The stable softness | flexibility can be maintained.

  The invention according to claim 14 of the present invention is characterized in that the magnetic member contains 3 to 15% by weight of a mixed material of sorbitan monocaprylate and glycerin plastic material with respect to the ceramic magnetic powder. The magnetic member according to claim 1, wherein stable flexibility can be maintained.

The invention according to claim 15 of the present invention is the magnetic member according to any one of claims 1 to 14, wherein the magnetic member has a surface resistivity of 1 × 10 ⁸ Ω or more. Various circuits such as a matching circuit can be incorporated on the member, and the apparatus can be miniaturized.

The invention according to claim 16 of the present invention is the magnetic member according to any one of claims 1 to 15, wherein the bulk density of the magnetic member is 2.3 g / cm ³ or more, Magnetic characteristics can be stabilized and improved.

  The invention according to claim 17 of the present invention is the magnetic member according to any one of claims 1 to 16, wherein the magnetic member has a surface roughness of 10 μm or less. Various circuits can be incorporated with high accuracy.

  The invention according to claim 18 of the present invention is characterized in that the magnetic member is easily dissolved and dispersed in distilled water or ion-exchanged water, and the dissolution / dispersion part has adhesiveness. The magnetic member according to 1, wherein the loop antenna or the like does not require an adhesive sheet or the like, and can be bonded at a low cost.

  The invention according to claim 19 of the present invention is the magnetic member according to any one of claims 1 to 18, wherein the magnetic member has a silicon coating on the surface or a part thereof. Reliability such as weather resistance of the magnetic member can be improved.

  The invention according to claim 20 of the present invention is the magnetic member according to any one of claims 1 to 19, characterized in that the magnetic member can form a conductive member on the surface or inside thereof. It is possible to produce a simple matching circuit and various circuits.

  The invention according to claim 21 of the present invention is the magnetic member according to claim 20, wherein the conductive member of the magnetic member is a plating transfer method or a screen printing method. It becomes possible to form a circuit with high accuracy.

  According to a twenty-second aspect of the present invention, in any one of the first to twenty-first aspects, the magnetic member is in the form of a sheet having flexibility, a plate shape, or a box shape. The magnetic member can correspond to antennas of various shapes.

  The invention according to claim 23 of the present invention is the magnetic member according to claim 22 characterized in that the magnetic member is an extruded green sheet, and does not require an explosion-proof facility, so it is low cost and accurate. Can be manufactured well.

  A twenty-fourth aspect of the present invention includes the magnetic member according to any one of the first to twenty-third aspects and an antenna that communicates with a wireless communication medium via a magnetic field, and the magnetic member is a side surface of the antenna. Alternatively, the antenna device is disposed close to or in contact with at least one of the bottom surface, the top surface, and the back surface, and can be easily stored in a product shelf or a product box.

Invention of Claim 25 of this invention, The magnetic member in any one of Claims 1-23,
Between the antenna that communicates with the wireless communication medium via a magnetic field and the wireless communication medium, it has a read / write unit that writes or reads data, or reads and writes, and the magnetic member is a side surface or bottom surface of the antenna, Alternatively, the wireless communication medium processing device is arranged close to or in contact with at least one of the upper surface and the rear surface, and the efficiency of merchandise management, inventory, etc. is improved.

  The invention according to claim 26 of the present invention is the wireless communication medium processing apparatus according to claim 25, wherein the metal member is disposed at a position where the magnetic member is sandwiched with the antenna. Leakage can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view of a magnetic member according to an embodiment of the present invention. Reference numeral 11 denotes a ceramic magnetic calcined powder, and 12 denotes a film for bonding the ceramic magnetic calcined powder. First, the ceramic magnetic calcined powder 11 will be described.

Ceramic based magnetic calcinated body 11 is Ni-Zn ferrite or is made of a Mn-Zn ferrite, the Ni-Zn ferrite, specifically, 48.5 mol% of Fe ₂ O _3, ZnO This ceramic system is prepared by blending at a composition ratio of 20.55 mol%, NiO at 20.55 mol%, and CuO at 10.40 mol%, calcining in the range of 750 ° C to 900 ° C for 4 hours, The magnetic calcined powder has an average particle size of 0.8 μm to 1.3 μm.

  Here, the average particle size of the ceramic magnetic calcined powder is preferably 0.1 μm to 8.0 μm. If it is 0.1 μm or less, it takes time to finely pulverize, and a large amount of moisture is required when producing a green sheet of a magnetic member described later, which is preferable because molding and workability become unstable. Absent.

  On the other hand, if it is 8.0 m or more, the surface roughness of the magnetic member becomes rough, which is not preferable.

  Next, the coating 12 for bonding the ceramic magnetic calcined powders to which the ceramic magnetic calcined powders are bonded will be described. The coating 12 for bonding the ceramic magnetic calcined powder is formed on the surface of the ceramic magnetic calcined powder 11 to bond the ceramic magnetic calcined powder 11 to each other. The film forming the film 12 to which the ceramic magnetic calcined powders are respectively bonded is composed of hydroxypropylmethylcellulose or hydroxyethylmethylcellulose resin as a water-soluble binder, and sorbitan monocaprylate or glycerin plastic as an oily plasticizer. It is preferable that it is formed from a material. These resins and plastic materials are easy to handle, are free from environmentally hazardous substances, and are effective materials for preventing environmental pollution.

  Here, the hydroxypropylmethylcellulose or hydroxyethylmethylcellulose resin is desirably 2 to 10% by weight based on the ceramic magnetic calcined powder. If it is 2% by weight or less, shape retention cannot be secured sufficiently, which is not preferable. On the other hand, if it is 10% by weight or more, the magnetic properties of the magnetic member deteriorate, which is not preferable.

  Here, the sorbitan monocaprylate or the glycerin plastic material is desirably 3 to 15% by weight with respect to the ceramic magnetic calcined powder. If it is 3% by weight or less, the magnetic member cannot be sufficiently flexible, which is not preferable. On the other hand, when the content is 15% by weight or more, the volatile content of the plastic material from the magnetic member increases, and the change with time increases.

  The green sheet made of the magnetic member having the above configuration is manufactured as follows.

  First, 3000 g ceramic ceramic calcined powder having the above composition, 135 g Metroze 60SH4000 (manufactured by Shin-Etsu Chemical Co., Ltd.) as a water-soluble binder, 270 g ceramisole C-08 (manufactured by Nippon Oil & Fats) as an oily plastic material, and 340 g distilled water. Was mixed with a mixer for 20 minutes, and three rolls were further passed three times to form a soil. This soil is stored and aged at 5 ° C. for 96 hours, and then a sheet having a thickness of about 3 mm is produced by a vacuum extrusion molding apparatus.

  Next, the sheet was dried by passing the surface of a drum dryer at 95 ° C., and cut into a predetermined size to produce a magnetic sheet having a thickness of 3 mm. Therefore, first, the Q value of the magnetic sheet was measured with an HP 4191ARF impedance analyzer. The Q value was measured by processing a magnetic sheet into a disc shape having a diameter of 2.5 cm and an inner diameter of 1.3 cm, and passing a lead wire having a diameter of 0.5 mm through the disc. The measurement results are shown in (Table 1).

From this result, it can be seen that the Q value at a frequency of 13.56 MHz is 8, which is superior to the comparative example. In the comparative example, only the composition of the ceramic magnetic calcined powder was changed, and the other conditions were the same. Powder composition ratio is 48 mol% of Fe ₂ O _3, 42mol% of NiO, was CuO and 10 mol%.

Next, the surface resistivity, bulk density, and surface roughness of the green sheet were measured and found to be 5 × 10 ⁹ Ω, 3.3 g / cm ³ , and 0.6 μm. From these values, it can be seen that a matching circuit, a circuit pattern, and the like can be incorporated on the green sheet.

  Therefore, a circuit pattern was formed on this green sheet.

First, a 0.3 mm sheet is produced by extrusion molding. Next, a silver conductor pattern having a length of 100 mm, a width of 3 mm, and a thickness of 0.04 mm was transferred onto the sheet by a plating transfer method. Next, another sheet of 0.3 mm was superposed on the sheet onto which the conductor was transferred. And the green sheet by which the silver conductor of thickness 0.48mm was comprised by pressure-molding by the press of 150 kg per square centimeter with the press machine heated at 40 degreeC was produced. And when the resistance value of the silver conductor in this magnetic sheet was measured, it showed a low resistance value of 0.03Ω, and it was found that a matching circuit and a circuit pattern can be incorporated from now on.

Here, when the surface resistivity of the green sheet is 1 × 10 ⁸ Ω or less, there is a problem that a short circuit occurs when the line spacing of the circuit pattern is narrow.

The green sheet preferably has a bulk density of 2.3 g / cm ³ or more. When the bulk density is 2.3 g / cm ³ or less, the magnetic characteristics are not stable, and the green sheet itself is likely to absorb moisture, causing a problem of short-circuiting between patterns, such as when a circuit pattern is formed inside. It is not preferable.

  The green sheet desirably has a surface roughness of 10 μm or less. A surface roughness of 10 μm or more is not preferable because the conductor is disconnected or a gap is generated between the green sheet and the conductor, and a circuit pattern cannot be formed with high accuracy.

  In addition, since the green sheet manufactured in this embodiment has appropriate flexibility, it can be easily punched and formed by punching or the like, so that complicated shapes can be processed at low cost and in large quantities. It also has the feature that it can be molded.

  In addition, the green sheet produced in the present embodiment is easily dissolved and dispersed in distilled water, ion-exchanged water or the like, and has an adhesive property in the dissolving and dispersing portion. Therefore, since the melted surface has adhesiveness, there is no need for an adhesive tape or the like for attaching a green sheet, so that there is also an effect that the thickness can be reduced at a low cost.

  Furthermore, the weather resistance can be further improved by forming a silicon film on the surface of the green sheet produced in the present embodiment or a part thereof. By spraying a mixture of silicon solution SR2411 (manufactured by Toray) and toluene solution on a green sheet surface and drying at 50 ° C. for 10 minutes, a silicon film can be easily formed, and a water repellent effect is obtained. Therefore, the weather resistance can be improved.

  Next, using the antenna device for processing a wireless communication medium, a comparison was made between the magnetic member of the present embodiment, and further a magnetic member obtained by kneading a metal-based magnetic powder such as Sendust or Permalloy with an organic binder.

  FIG. 2 is a cross-sectional view of the antenna unit of the radio communication medium processing antenna apparatus according to the embodiment of the present invention, and FIG. 3 is a perspective view of the antenna unit of the radio communication medium processing antenna apparatus according to the embodiment of the present invention. 21 is a resin case, 22 is an antenna pattern, 23 is an antenna substrate, 24 is a GND pattern, 25 is a matching circuit, 26 is a magnetic member, 27 is a resin spacer, 31 is an antenna unit, 32 is a cable, 33 is a leader A lighter device 34 is an RF unit. Here, the shape of the magnetic member 26 is 180 mm × 210 mm × 3 mm, and the antenna pattern 22 is an aluminum loop antenna having a thickness of 2 mm, and is placed on the magnetic member 26 via a substrate.

  Here, the actual generation of magnetic flux from the antenna unit 31 and the effect of the magnetic member when metal is present at the bottom of the antenna unit will be described.

FIG. 4 shows a magnetic flux generation diagram in the presence or absence of a magnetic member of the radio communication medium processing antenna device according to the embodiment of the present invention. 41 is a magnetic flux and 42 is a metal material. When a signal is input to the antenna unit 31, a magnetic flux 41 is generated near the antenna. In this case, if the magnetic member 26 is installed in the unit, the magnetic flux 41 is expanded without being affected by the metal material 42, and the communication distance is extended. However, if there is no magnetic member 26 in the unit, an eddy current is generated around the magnetic flux 41 passing through the metal and converted into heat, so that the magnetic flux is reduced and the communication distance does not increase. Therefore, it is very important to install a magnetic member in the antenna unit, and the magnetic characteristics of the magnetic member 26 affect the expansion of the communication distance.

  Therefore, the communication distance of the magnetic member 26 was measured using an IC tag as an example of a wireless communication medium as an output of 2.5 W of the antenna unit 31. The measurement results are shown in (Table 2).

  From this (Table 2), it can be seen that in the magnetic member of the present embodiment, the communication distance is extended to 35 cm, which is superior to the comparative example. This is because the ceramic magnetic calcined powder has good filling properties and is formed of a dense magnetic member.

  As described above, when the wireless communication medium processing antenna device is used as a product shelf or a product basket, product management can be performed appropriately.

  For example, when the product is a medicine or the like, the name, expiration date, delivery date, etc. are set in advance on the IC tag attached to these products and the box-shaped body is used as a medicine storage shelf. Can easily manage the inventory of medicines, for example, by discarding medicines immediately before the expiration date in advance and storing only how much medicines are left. Similarly, the same applies to the case where the product is a book or food. For this reason, there is a merit that efficiency such as inventory is greatly improved.

  As described above, an unfired magnetic member using a ceramic-based magnetic calcined powder is processed into a plate shape or a sheet shape, and an antenna incorporated into a wireless communication medium such as an IC tag, By adopting a form that is close to or in contact with the position of the back surface, bottom surface, side surface, etc. of the antenna that performs communication with this wireless communication medium, the surrounding area can be made more than a magnetic member using conventional metal-based magnetic powder. The influence of metal can be avoided, the magnetic field strength can be increased, and the communication distance can be extended. In addition, since it can be made a highly flexible magnetic member compared to the case of using ferrite or metal-based magnetic powder, it is less likely to be damaged during manufacturing, transportation or use, and has a durable property. A high antenna unit can be formed. As a result, it is possible to simultaneously improve the performance and durability of the wireless communication medium and the wireless communication medium processing device.

In addition, by providing a metal member outside the magnetic member (at a position where the magnetic member is sandwiched with the antenna), there is a merit of having a role of a shield and preventing leakage of a magnetic field emitted from the antenna on the outside. By this. For example, it is suitable when it is desired to exchange only with a wireless communication medium existing only inside the antenna.

  The magnetic member according to the present invention uses a ceramic-based calcined powder, a hydroxypropylmethylcellulose or hydroxyethylmethylcellulose-based resin as a water-soluble binder, and sorbitan monocaprylate or a glycerin-based plasticizer as an oily plasticizer. Since it is molded into a shape, the magnetic powder has a good filling property, and the molded sheet is excellent in molding processability, so it becomes a dense and flexible magnetic member, and is an RF-ID reader / writer. Alternatively, it is used by being placed on the back surface or side surface of the loop antenna for the tag, and can be applied to use for blocking the influence on the magnetic field affected object (eddy current generation 9) on the back surface of the antenna section.

Sectional drawing of the structure of the magnetic member in embodiment of this invention Sectional drawing of the antenna unit of the antenna apparatus for wireless communication medium processing in embodiment of this invention The perspective view of the antenna unit of the antenna apparatus for wireless communication medium processing in embodiment of this invention Generation diagram of magnetic flux with and without magnetic member of antenna device for processing wireless communication media in an embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Ceramic-type magnetic calcined powder 12 Film | membrane which couple | bonds each ceramic-type magnetic calcined powder 21 Resin case 22 Antenna pattern 23 Antenna board 24 GND pattern 25 Matching circuit etc. 26 Magnetic member 27 Resin spacer 31 Antenna unit 32 Cable 33 Leader Lighter device 34 RF unit 41 Magnetic flux 42 Metal material

Claims (26)

A ceramic magnetic calcined powder, a water-soluble binder, and a flexible magnetic member using an oil-based plasticizer,
A magnetic member that is used in contact with or close to an antenna. The magnetic member according to claim 1, wherein the antenna is an antenna that communicates with a wireless communication medium using a magnetic field. The magnetic member according to claim 1, wherein the antenna is an antenna for a wireless communication medium processing device or an antenna stored in a wireless communication medium. 4. The wireless communication medium processing device is an RF-ID reader / writer, and the wireless communication medium is an IC card, an IC tag, an ID card, or an ID tag. Magnetic member. The magnetic member according to claim 1, wherein the antenna is a loop antenna having an opening. The magnetic member according to claim 1, wherein the antenna is a spiral antenna. The magnetic member according to any one of claims 1 to 6, wherein the magnetic member is disposed and used on at least one of a back surface, a side surface, a bottom surface, or a top surface of the antenna. The magnetic member according to claim 1, wherein the ceramic magnetic calcined powder contains Ni—Zn ferrite or Mn—Zn ferrite. The ceramic-based magnetic calcined powder _{Fe 2 O 3, ZnO, NiO} , CuO, _{or, Fe 2 O 3, ZnO,} MnO, claims 1-8 magnetic any 1 wherein the consisting CuO Element. The magnetic member according to any one of claims 1 to 9, wherein the ceramic-based magnetic calcined powder has an average particle size of 0.1 µm or more and 8.0 µm or less. The water-soluble binder is hydroxypropyl methylcellulose, a hydroxyethyl methylcellulose-based resin, or a combination thereof, and the oily plasticizer is sorbitan monocaprylate, a glycerin-based plasticizer, or a combination thereof. The magnetic member according to claim 1, wherein the magnetic member is a magnetic member. The magnetic member according to claim 11, wherein the hydroxypropylmethylcellulose or the hydroxyethylmethylcellulose-based resin is contained in an amount of 2 to 10% by weight with respect to the ceramic magnetic powder. The magnetic member according to any one of claims 11 to 12, wherein the sorbitan monocaprylate or the glycerin plastic material is contained in an amount of 3 to 15% by weight with respect to the ceramic magnetic powder. 14. The magnetic member according to claim 1, wherein the magnetic material contains 3 to 15% by weight of a mixed material of sorbitan monocaprylate and glycerin plastic material with respect to the ceramic magnetic powder. The magnetic member according to 1. The magnetic member according to claim 1, wherein the magnetic member has a surface resistivity of 1 × 10 ⁸ Ω or more. The bulk density of the magnetic member is either 1, wherein the magnetic member according to claim 15, characterized in that it is 2.3 g / cm ³ or more. The magnetic member according to claim 1, wherein the magnetic member has a surface roughness of 10 μm or less. 18. The magnetic member according to claim 1, wherein the magnetic member is easily dissolved and dispersed in distilled water or ion-exchanged water, and the dissolution / dispersion part has adhesiveness. The magnetic member according to claim 1, wherein the magnetic member has a silicon coating on the surface or a part thereof. The magnetic member according to claim 1, wherein a conductive member can be formed on a surface or inside of the magnetic member. The magnetic member according to claim 20, wherein the conductive member of the magnetic member is a plating transfer method or a screen printing method. The magnetic member according to any one of claims 1 to 21, wherein the magnetic member is in the form of a flexible sheet, plate, or box. The magnetic member according to claim 22, wherein the magnetic member is an extruded green sheet. A magnetic member according to any one of claims 1 to 23,
An antenna that communicates with a wireless communication medium via a magnetic field;
An antenna device, wherein the magnetic member is disposed in proximity to or in contact with at least one of a side surface, a bottom surface, a top surface, and a back surface of the antenna. A magnetic member according to any one of claims 1 to 23,
An antenna for communicating with a wireless communication medium via a magnetic field;
It has a read / write unit for writing / reading data or reading / writing data with the wireless communication medium,
A wireless communication medium processing device, wherein the magnetic member is disposed in proximity to or in contact with at least one of a side surface, a bottom surface, a top surface, and a back surface of the antenna. 26. The wireless communication medium processing apparatus according to claim 25, wherein a metal member is disposed at a position sandwiching the magnetic member with the antenna.

Images