JP7449962B2 - contactless communication medium - Google Patents

Description

TECHNICAL FIELD This disclosure relates to contactless communication media.

Conventionally, goods have been managed using RFID (Radio Frequency Identifier) tags.

Patent Document 1 discloses a technique for sealing an RFID tag with a heat-insulating container in order to use the RFID tag for managing components that are processed at high temperatures in a factory or the like. The container described in Patent Document 1 includes a container that accommodates an RFID tag and a lid that is joined to the container. The RFID tag sealed in the container is passed through the manufacturing process along with the component.

Japanese Patent Application Publication No. 2008-129838

A contactless communication medium according to one aspect of the present disclosure includes an electronic component and a container. Electronic components perform contactless communication. The container has a first base material and a second base material whose flat surfaces facing each other are bonded to each other via an adhesive layer, and an electronic component is stored in a housing recess provided on one flat surface, and an electronic component is stored in a housing recess provided on one flat surface. The accommodation recess is closed by the flat surface. Further, the first base material has a convex portion that protrudes circumferentially from the flat surface of the first base material so as to surround the accommodation recess.

FIG. 1 is a side view of a contactless communication medium according to an embodiment. FIG. 2 is a plan view of the contactless communication medium according to the embodiment. FIG. 3 is a cross-sectional view taken along the line III-III shown in FIG. FIG. 4 is a plan view of the first base material. FIG. 5 is an enlarged view of section H shown in FIG. 3. FIG. 6 is an enlarged cross-sectional view of the contactless communication medium according to the first modification. FIG. 7 is an enlarged cross-sectional view of a non-contact communication medium according to a second modification. FIG. 8 is an enlarged cross-sectional view of a non-contact communication medium according to a third modification. FIG. 9 is an enlarged cross-sectional view of a non-contact communication medium according to a fourth modification. FIG. 10 is an enlarged cross-sectional view of a contactless communication medium according to a fifth modification. FIG. 11 is an enlarged sectional view of a non-contact communication medium according to a sixth modification. FIG. 12 is an enlarged cross-sectional view of a contactless communication medium according to a seventh modification. FIG. 13 is an enlarged cross-sectional view of a non-contact communication medium according to an eighth modification. FIG. 14 is an enlarged sectional view of a non-contact communication medium according to a ninth modification. FIG. 15 is an enlarged cross-sectional view of a non-contact communication medium according to a tenth modification. FIG. 16 is a side view of a contactless communication medium according to an eleventh modification. FIG. 17 is a plan view of a non-contact communication medium according to an eleventh modification. FIG. 18 is a sectional view taken along the line XVIII-XVIII shown in FIG. 17. FIG. 19 is an enlarged cross-sectional view of a contactless communication medium according to a twelfth modification. FIG. 20 is an enlarged cross-sectional view of a non-contact communication medium according to a thirteenth modification. FIG. 21 is an enlarged cross-sectional view of a non-contact communication medium according to a fourteenth modification. FIG. 22 is an enlarged cross-sectional view of a non-contact communication medium according to a fifteenth modification. FIG. 23 is an enlarged sectional view of a non-contact communication medium according to a sixteenth modification. FIG. 24 is an enlarged cross-sectional view of a non-contact communication medium according to a seventeenth modification. FIG. 25 is an enlarged cross-sectional view of a non-contact communication medium according to the 18th modification. FIG. 26 is an enlarged cross-sectional view of a non-contact communication medium according to a nineteenth modification. FIG. 27 is a cross-sectional view taken along the line XXVII-XXVII shown in FIG. 26. FIG. 28 is an enlarged cross-sectional view of a contactless communication medium according to a twentieth modification. FIG. 29 is an enlarged cross-sectional view of a non-contact communication medium according to a twenty-first modification.

Hereinafter, a form for implementing a contactless communication medium according to the present disclosure (hereinafter referred to as an "embodiment") will be described in detail with reference to the drawings. Note that this embodiment does not limit the contactless communication medium according to the present disclosure. Moreover, each embodiment can be combined as appropriate within the range that does not conflict with the processing contents. Further, in each of the embodiments below, the same parts are given the same reference numerals, and redundant explanations will be omitted.

In addition, in the embodiments described below, expressions such as "constant", "orthogonal", "perpendicular", or "parallel" may be used, but these expressions strictly do not mean "constant", "orthogonal", "parallel", etc. They do not need to be "perpendicular" or "parallel". That is, each of the above expressions allows deviations in manufacturing accuracy, installation accuracy, etc., for example.

In addition, in order to make the explanation easier to understand, each of the drawings referred to below shows an orthogonal coordinate system in which the X-axis direction, Y-axis direction, and Z-axis direction that are orthogonal to each other are defined, and the positive Z-axis direction is the vertically upward direction. There are cases.

<Configuration of contactless communication medium>
The configuration of the contactless communication medium according to the embodiment will be described with reference to FIGS. 1 to 4. FIG. 1 is a side view of a contactless communication medium according to an embodiment. Further, FIG. 2 is a plan view of the contactless communication medium according to the embodiment. Further, FIG. 3 is a cross-sectional view taken along the line III-III shown in FIG. Moreover, FIG. 4 is a plan view of the first base material.

As shown in FIGS. 1 to 3, the contactless communication medium 1 according to the embodiment includes an electronic component 10 and a container 20. The electronic component 10 is, for example, an RFID tag.

The electronic component 10 as an RFID includes an antenna for non-contact communication, an IC chip for non-contact communication via this antenna, and identification information on a substrate made of, for example, LTCC (Low Temperature Co-fired Ceramics). It has a stored memory. The electronic component 10 as an RFID can transmit identification information stored in a memory to an external device (for example, an RFID reader) through non-contact communication using electromagnetic induction, radio waves, or the like.

The non-contact communication medium 1 according to the embodiment may be used, for example, in a high temperature environment exceeding the allowable temperature limit of the electronic component 10. For example, the non-contact communication medium 1 according to the embodiment is attached to a part to be plated, and is plated together with the part. The temperature of a plating solution such as hot-dip galvanizing is, for example, 75°C to 500°C. Further, the non-contact communication medium 1 according to the embodiment may be treated with an acidic chemical or an alkaline chemical together with parts. That is, the non-contact communication medium 1 according to the embodiment may be used in an acid/alkaline environment that exceeds the chemical resistance of the electronic component 10.

Therefore, in the non-contact communication medium 1 according to the embodiment, the electronic component 10 is sealed with the container 20 in order to protect the electronic component 10 from a high temperature environment and an acid/alkali environment.

On the other hand, if a container containing electronic components is simply sealed with a lid, liquids such as plating solution or gases such as corrosive gas may leak from the joint between the container and the lid during the manufacturing process. There is a risk of intrusion and damage to the internal RFID tag. In view of this point, the non-contact communication medium 1 according to the embodiment has a structure for suppressing intrusion of external liquid or gas from the joint portion of the container 20.

The container 20 includes a first base material 21 and a second base material 22 made of ceramics, and an adhesive layer 23. The first base material 21 and the second base material 22 are bonded to each other via an adhesive layer 23. Specifically, the first base material 21 and the second base material 22 have flat surfaces 21a and 22a having substantially the same diameter and facing each other. The first base material 21 and the second base material 22 have flat surfaces 21a and 22a joined to each other via an adhesive layer 23. Hereinafter, the flat surface 21a of the first base material 21 will be referred to as the "first flat surface 21a", and the flat surface 22a of the second base material 22 will be referred to as the "second flat surface 22a".

The first base material 21 has an accommodation recess 25 in which the electronic component 10 is accommodated. The accommodation recess 25 opens at the center of the first flat surface 21a. The first flat surface 21a is closed by the second flat surface 22a of the second base material 22. Thereby, the electronic component 10 is sealed inside the container 20.

As the ceramic forming the first base material 21 and the second base material 22, for example, cordierite can be used. Cordierite has a small coefficient of thermal expansion and therefore has excellent thermal shock resistance. Furthermore, since cordierite has low thermal conductivity, it is difficult to transmit heat to the electronic component 10. In this way, by using cordierite, the electronic component 10 can be appropriately protected from a high-temperature environment. Note that the ceramics forming the first base material 21 and the second base material 22 do not necessarily need to be cordierite. This point will be discussed later.

The adhesive layer 23 is made of adhesive. The adhesive only needs to have heat resistance that can withstand the environment in which the non-contact communication medium 1 is used. As such an adhesive, for example, an inorganic adhesive can be used. Further, as the adhesive, an inorganic adhesive to which ceramic powder is added may be used.

Both the first base material 21 and the second base material 22 have a cylindrical shape. Specifically, the first base material 21 and the second base material 22 have flat surfaces (upper end surface and lower end surface) that are circular in plan view at both ends, and a curved surface (outer peripheral surface) that connects the upper end surface and the lower end surface. have The adhesive layer 23 is located between the first flat surface 21a, which is the upper end surface of the first base material 21, and the second flat surface 22a, which is the lower end surface of the second base material 22. The first base material 21 and the second base material 22 joined by the adhesive layer 23 have a cylindrical shape (so-called coin shape) as a whole.

A housing recess 25 is located on the first flat surface 21 a of the first base material 21 . The electronic component 10 is housed in the housing recess 25 . The size of the housing recess 25 is not particularly limited, and may be at least larger than the electronic component 10. Further, the inside of the housing recess 25 is a space, and no filler or the like is located therein.

As shown in FIG. 3, a convex portion 26 is further located on the first flat surface 21a of the first base material 21. As shown in FIG. As shown in FIG. 4, the convex portion 26 protrudes circumferentially from the first flat surface 21a so as to surround the accommodation recess 25. As shown in FIG.

In this manner, in the non-contact communication medium 1 according to the embodiment, the accommodating recess 25 is surrounded by the convex portion 26 .

A liquid such as a plating solution or a gas such as a corrosive gas flows from the interface between the first base material 21 or the second base material 22 and the adhesive layer 23 to the container 20 along the first flat surface 21a or the second flat surface 22a. penetrate inside. Since the non-contact communication medium 1 according to the embodiment has the convex portion 26 in the middle of the intrusion route, the invading liquid or gas can be dammed before the accommodation recess 25.

Therefore, according to the non-contact communication medium 1 according to the embodiment, it is possible to suppress intrusion of external liquid or gas from the joint portion of the container 20.

FIG. 5 is an enlarged view of section H shown in FIG. 3. As shown in FIG. 5, the convex portion 26 is in contact with the second flat surface 22a of the second base material 22. As shown in FIG. By bringing the convex portion 26 into contact with the second flat surface 22a in this manner, liquid or gas can be dammed up more reliably. Therefore, it is possible to more reliably prevent external liquid or gas from entering through the joint portion of the container 20.

Further, the convex portion 26 also functions as a spacer that defines the distance between the first flat surface 21a and the second flat surface 22a by contacting the second flat surface 22a. Therefore, according to the non-contact communication medium 1 according to the embodiment, it is possible to suppress variations in the thickness of the adhesive layer 23 among the plurality of non-contact communication media 1. In other words, variations in quality among the plurality of non-contact communication media 1 can be suppressed.

<Manufacturing method>
Next, an example of a method for manufacturing the contactless communication medium 1 according to the embodiment will be described.

First, cordierite powder and sintering aid powder are prepared. Sintering aids include, for example, rare earth oxides (yttrium oxide, cerium oxide, etc.), alkali metal oxides (lithium oxide, sodium oxide, etc.), and alkaline earth metals (calcium oxide). Note that instead of cordierite powder, a mixture of magnesium oxide, aluminum oxide, and silicon oxide in a desired cordierite composition ratio may be used. Next, the prepared powder is put into a vibration mill together with water as a solvent, and the raw material is obtained by grinding and mixing.

Next, organic components such as a binder, a plasticizer, and a mold release agent are added to the raw materials obtained by pulverizing and mixing. Thereafter, a slurry is prepared by stirring these, and the prepared slurry is spray-dried using a spray dryer. Ceramic granules are thereby obtained.

Subsequently, the prepared ceramic granules are subjected to powder press molding to obtain molded bodies of the first base material 21 and the second base material 22. Incidentally, the housing recess 25 and the circumferential convex portion 26 (see FIG. 3) are also molded using a mold in this step.

Subsequently, the molded body is degreased by heat-treating it in an air atmosphere, a vacuum atmosphere, or a nitrogen gas atmosphere. Thereafter, the first base material 21 and the second base material 22 are obtained by firing the molded body. In addition, in order to obtain a desired shape, cutting and grinding processes may be performed on the molded bodies of the first base material 21 and the second base material 22 or on the first base material 21 and the second base material 22 after firing. good.

Subsequently, after housing the electronic component 10 in the housing recess 25, the first flat surface 21a of the first base material 21 and the second flat surface 22a of the second base material 22 are bonded using an adhesive. Thereby, the container 20 containing the electronic component 10 is obtained. Through the above steps, the contactless communication medium 1 according to the embodiment is obtained.

<First modification example>
FIG. 6 is an enlarged cross-sectional view of the contactless communication medium according to the first modification. As shown in FIG. 6, a container 20A included in a non-contact communication medium 1A according to the first modification includes a second base material 22A. The second base material 22A has a concave portion 27A at a position facing the convex portion 26 on the second flat surface 22a.

In a cross-sectional view shown in FIG. 6, specifically, in a cross-sectional view of the container 20A cut along a plane perpendicular to the flat surfaces 21a, 22a and passing through the centers of the flat surfaces 21a, 22a, the width W1 of the recessed portion 27A is the same as that of the convex portion. It is smaller than the width W2 of 26. In this case, the convex portion 26 contacts the open end 27A1 of the concave portion 27A and closes the concave portion 27A. The internal space 27A2 of the recess 27A closed by the protrusion 26 may have a cavity that is not filled with adhesive. The cavity in the internal space 27A2 functions as a space for storing liquid or gas that has entered from the outside. Note that the internal space 27A2 may partially contain adhesive.

By making the width of the concave portion 27A smaller than the width of the convex portion 26 in this way, it is possible to form an internal space 27A2 between the concave portion 27A and the convex portion 26A in which liquid or gas that has entered from the outside accumulates. can. By accumulating the liquid or gas in the internal space 27A2, it is possible to prevent the liquid or gas from entering inward from the internal space 27A2. Therefore, according to the non-contact communication medium 1A according to the first modification, it is possible to further suppress external liquid or gas from entering through the joint portion of the container 20A.

Moreover, according to the non-contact communication medium 1A according to the first modification, since the position of the recessed part 27A corresponds to the position of the convex part 26, in the manufacturing process of the non-contact communication medium 1A, the first base material 21 and the second base material 22A can be easily aligned.

<Second modification example>
FIG. 7 is an enlarged cross-sectional view of a non-contact communication medium according to a second modification. As shown in FIG. 7, a container 20B included in a non-contact communication medium 1B according to the second modification includes a second base material 22B.

The width W1 of the concave portion 27B of the second base material 22B is larger than the width W2 of the convex portion 26. In this case, the convex portion 26 contacts the concave portion 27B. This blocks the path of liquid or gas intrusion from the outside. Furthermore, compared to the case where the second flat surface 22a and the convex portion 26 are in contact with each other (see FIG. 5), the surface distance of the interface between the second flat surface 22a and the adhesive layer 23 is longer. This makes it difficult for liquid or gas to reach the accommodation recess 25.

Therefore, according to the non-contact communication medium 1B according to the second modification, it is possible to further suppress external liquid or gas from entering through the joint portion of the container 20B.

<Third modification example>
FIG. 8 is an enlarged cross-sectional view of a non-contact communication medium according to a third modification. As shown in FIG. 8, a container 20C included in a non-contact communication medium 1C according to the third modification has a second base material 22B similar to the second modification. The width W1 of the concave portion 27B of the second base material 22B is larger than the width W2 of the convex portion 26C of the first base material 21C, which will be described later.

A container 20C according to the third modification includes a first base material 21C. The convex portion 26C of the first base material 21C has a rectangular shape and a flat end surface. On the other hand, the inner surface of the recess 27B of the second base material 22B is curved. In this case, the convex portion 26C contacts the curved inner surface of the concave portion 27B and closes the concave portion 27B. The internal space 27B1 of the recess 27B closed by the protrusion 26C may have a cavity that is not filled with adhesive. The cavity in the internal space 27B1 functions as a space for storing liquid or gas that has entered from the outside. Note that the internal space 27B1 may partially contain adhesive.

In this way, the non-contact communication medium 1C according to the third modification can increase the surface distance of the interface between the second flat surface 22a and the adhesive layer 23, which serves as a path for liquid or gas to enter. Further, in the non-contact communication medium 1C according to the third modification, an internal space 27B1 in which liquid or gas entering from the outside accumulates can be formed in the recess 27B. Therefore, according to the non-contact communication medium 1C according to the third modification, it is possible to further suppress external liquid or gas from entering through the joint portion of the container 20C.

<Fourth variation>
FIG. 9 is an enlarged cross-sectional view of a non-contact communication medium according to a fourth modification. As shown in FIG. 9, a container 20D included in a non-contact communication medium 1D according to the fourth modification includes a second base material 22D.

The second base material 22D has a recess 27D. The width of the concave portion 27D is, for example, the same as the width of the convex portion 26 of the first base material 21. Further, the depth of the recess 27D is, for example, the same as the protrusion height of the protrusion 26.

In the non-contact communication medium 1D according to the fourth modification, the convex portion 26 is not in contact with the concave portion 27D, and the adhesive layer 23 is interposed between the convex portion 26 and the concave portion 27D. In this way, the convex portion 26 does not necessarily need to be in contact with the second base material 22D. Even in such a case, since the surface length of the liquid or gas intrusion path can be increased, it is possible to suppress intrusion of external liquid or gas from the joint portion of the container 20D.

<Fifth modification example>
FIG. 10 is an enlarged cross-sectional view of a contactless communication medium according to a fifth modification. As shown in FIG. 10, a container 20E included in a non-contact communication medium 1E according to the fifth modification includes a second base material 22E.

The second base material 22E according to the fifth modification has a convex portion 28 that protrudes circumferentially from the second flat surface 22a so as to surround the accommodation recess 25 (see FIG. 3, etc.).

In this way, by providing the protrusions 26 and 28 alternately on both the first flat surface 21a and the second flat surface 22a, it is possible to further suppress intrusion of liquid or gas from the joint portion of the container 20E. Specifically, it is possible to suppress the intrusion of liquid or gas from the interface between the adhesive layer 23 and the second flat surface 22a and the intrusion of liquid or gas from the interface between the adhesive layer 23 and the first flat surface 21a. .

Note that although FIG. 10 shows an example in which the convex portion 28 is located outward from the convex portion 26 of the first base material 21, the convex portion 28 is located outside the convex portion 26 of the first base material 21. It may be located further inward than the above, that is, between the convex portion 26 and the accommodation recess 25.

Further, in FIG. 10, the convex portion 26 of the first base material 21 is in contact with the second flat surface 22a of the second base material 22E, and the convex portion 28 of the second base material 22E is in contact with the second flat surface 22a of the second base material 22E. 1 shows an example in which the contact point contacts the flat surface 21a. The present invention is not limited to this example, and for example, only one of the convex portions 26 and 28 may be in contact with the flat surfaces 21a and 22a. Further, both of the convex portions 26 and 28 may be separated from the flat surfaces 21a and 22a.

<Sixth variation>
FIG. 11 is an enlarged sectional view of a non-contact communication medium according to a sixth modification. As shown in FIG. 11, a container 20F included in a non-contact communication medium 1F according to the sixth modification includes a first base material 21F.

The first base material 21F according to the sixth modification has a plurality of convex portions 26E. In this way, a plurality of convex portions 26E may be provided on one of the first base material 21F and the second base material 22 (here, the first base material 21F).

<Seventh modification example>
FIG. 12 is an enlarged cross-sectional view of a contactless communication medium according to a seventh modification. As shown in FIG. 12, a container 20G included in a non-contact communication medium 1G according to the seventh modification includes a first base material 21G.

The first base material 21G according to the seventh modification has a convex portion 26G. The convex portion 26G has a rectangular shape in cross-sectional view, and makes surface contact with the second flat surface 22a of the second base material 22.

In this way, the convex portion 26G makes surface contact with the second flat surface 22a, thereby further suppressing intrusion of liquid or gas from the outside.

<Eighth modification example>
FIG. 13 is an enlarged cross-sectional view of a non-contact communication medium according to an eighth modification. As shown in FIG. 13, a container 20H included in a non-contact communication medium 1H according to the eighth modification includes a first base material 21H.

The first base material 21H according to the eighth modification has a convex portion 26 and a concave portion 29. The recess 29 is open to the first flat surface 21a and is located further outward than the projection 26. Note that the recess 29 may be located more inward than the protrusion 26. The recess 29 functions as a space for storing liquid or gas that has entered from the outside. Thereby, it is possible to suppress external liquid or gas from reaching the accommodation recess 25 from the joint portion of the accommodation body 20H.

The recess 29 does not necessarily have to be circumferential. For example, the first base material 21H may have a plurality of recesses 29 that are circular in plan view, and the plurality of recesses 29 may be arranged in a circumferential manner.

Moreover, although the example in which the recess 29 is provided in the first base material 21H is shown here, the recess 29 may be provided in the second base material 22.

<9th modification example>
FIG. 14 is an enlarged sectional view of a non-contact communication medium according to a ninth modification. As shown in FIG. 14, a container 20J included in a non-contact communication medium 1J according to the ninth modification has an adhesive layer 23J.

The adhesive layer 23J according to the ninth modification protrudes from between the first base material 21 and the second base material 22. The adhesive layer 23J protrudes over the entire circumference of the container 20J. Note that the adhesive layer 23J only needs to protrude from at least a part of the circumferential direction of the container 20J.

In this way, since the adhesive layer 23J protrudes from the first base material 21 and the second base material 22, the first base material 21 and the second base material 22 can be more firmly joined.

<10th modification example>
FIG. 15 is an enlarged cross-sectional view of a non-contact communication medium according to a tenth modification. As shown in FIG. 15, a container 20K included in a non-contact communication medium 1K according to the tenth modification has a spherical shape. Specifically, the first base material 21K and the second base material 22K have a hemispherical shape. A spherical container 20K is obtained by joining the first base material 21K and the second base material 22K via the adhesive layer 23K.

In this way, by forming the container 20K into a spherical shape without corners, damage such as chipping or cracking of the container 20K can be further suppressed.

<Modifications regarding the holding structure of electronic components>
By the way, there is room for further improvement in the conventional technology in terms of suppressing damage such as chipping to electronic components caused by movement of electronic components such as RFID tags within the housing space. Therefore, the non-contact communication medium may have a structure for holding down electronic components.

<Eleventh modification example>
First, with reference to FIGS. 16 to 18, the structure of a non-contact communication medium according to an eleventh modification having the above-mentioned pressing structure will be described. FIG. 16 is a side view of a contactless communication medium according to an eleventh modification. Moreover, FIG. 17 is a plan view of a non-contact communication medium according to the eleventh modification. Further, FIG. 18 is a sectional view taken along the line XVIII-XVIII shown in FIG. 17.

Note that the holding structures for the electronic component 10 shown in the following 11th to 21st modifications can be appropriately incorporated into the non-contact communication media according to the above-described embodiments and the first to 10th modifications. be.

As shown in FIGS. 16 to 18, a non-contact communication medium 1L according to the eleventh modification includes an electronic component 10 and a container 200. The electronic component 10 is, for example, an RFID tag.

The container 200 includes a first base material 210 and a second base material 220 made of ceramic, and an adhesive layer 230. The first base material 210 and the second base material 220 are bonded to each other via an adhesive layer 230. Specifically, the first base material 210 and the second base material 220 have flat surfaces 210a and 220a having substantially the same diameter and facing each other. The first base material 210 and the second base material 220 have flat surfaces 210a and 220a bonded to each other via an adhesive layer 230. Hereinafter, the flat surface 210a of the first base material 210 will be referred to as the "first flat surface 210a", and the flat surface 220a of the second base material 220 will be referred to as the "second flat surface 220a".

The first base material 210 has an accommodation recess 250 that accommodates the electronic component 10 . The accommodation recess 250 opens at the center of the first flat surface 210a. The first flat surface 210a is closed by the second flat surface 220a of the second base material 220. Thereby, the electronic component 10 is sealed inside the container 200.

Adhesive layer 230 is made of adhesive. The adhesive only needs to have heat resistance that can withstand the environment in which the non-contact communication medium 1L is used.

Both the first base material 210 and the second base material 220 have a cylindrical shape. Specifically, the first base material 210 and the second base material 220 have flat surfaces (an upper end surface and a lower end surface) that are circular in plan view at both ends. Further, the first base material 210 and the second base material 220 have a curved surface (outer peripheral surface) that connects the upper end surface and the lower end surface. The adhesive layer 230 is located between the first flat surface 210a, which is the upper end surface of the first base material 210, and the second flat surface 220a, which is the lower end surface of the second base material 220. The first base material 210 and the second base material 220 bonded together by the adhesive layer 230 have a cylindrical shape (so-called coin shape) as a whole.

A housing recess 250 is located on the first flat surface 210a of the first base material 210. The electronic component 10 is housed in the housing recess 250. The inside of the accommodation recess 250 is a space, and no filler or the like is located therein.

As shown in FIG. 18, the second base material 220 has a housing protrusion 260 that protrudes from the second flat surface 220a and enters the housing recess 250.

In this manner, by inserting the housing protrusion 260 into the housing recess 250, the internal space of the housing recess 250 can be narrowed. By narrowing the internal space of the housing recess 250, even if the electronic component 10 moves in the internal space of the housing recess 250, the amount of movement will be reduced. Therefore, according to the non-contact communication medium 1L according to the eleventh modification, damage such as chipping to the electronic component 10 due to movement of the electronic component 10 within the accommodation recess 250 can be suppressed.

Furthermore, in the non-contact communication medium 1L according to the eleventh modification, the electronic component 10 is sandwiched between the tip end surface 260a of the housing convex portion 260 and the bottom surface 250a of the housing recess 250. Thereby, movement of the electronic component 10 within the housing recess 250 can be suppressed. Further, the interior of the accommodation recess 250 is a space. The electronic component 10 is not in contact with any member (eg, filler, etc.) other than the distal end surface 260a of the housing protrusion 260 and the bottom surface 250a of the housing recess 250. Therefore, compared to, for example, a case where the electronic component 10 is fixed with a filler or the like, heat from the outside is less likely to be transmitted to the electronic component 10.

In this way, by adopting a structure in which the electronic component 10 is sandwiched between the tip surface 260a of the housing convex portion 260 and the bottom surface 250a of the housing recess 250, heat conduction to the electronic component 10 can be suppressed, and chipping or the like can occur in the electronic component 10. damage can be suppressed.

Further, the tip end surface 260a of the housing convex portion 260 according to the eleventh modification is curved toward the bottom surface 250a of the housing recess 250, in other words, toward the electronic component 10. Thereby, the contact area between the housing convex portion 260 and the electronic component 10 can be reduced. Therefore, heat conduction from the second base material 220 to the electronic component 10 can be suppressed.

<12th modification example>
FIG. 19 is an enlarged cross-sectional view of a non-contact communication medium according to a twelfth modification. As shown in FIG. 19, a container 200M included in a non-contact communication medium 1M according to the twelfth modification includes a second base material 220M.

The distal end surface of the accommodation convex portion 260M of the second base material 220M is recessed in a curved shape, and at least a portion of the electronic component 10 is accommodated in this recessed portion. In the twelfth modification, the electronic component 10 is in point contact with the recessed surface 260M1 of the housing convex portion 260M, and is sandwiched between the recessed surface 260M1 and the bottom surface 250a of the housing recess 250.

In this way, the distal end surface of the accommodation convex portion 260M may be recessed. Also in this case, the contact area between the electronic component 10 and the housing convex portion 260M can be reduced. Therefore, movement of the electronic component 10 can be suppressed while suppressing heat conduction from the second base material 220M to the electronic component 10.

<13th modification example>
FIG. 20 is an enlarged cross-sectional view of a non-contact communication medium according to a thirteenth modification. As shown in FIG. 20, a container 200N included in a non-contact communication medium 1N according to the thirteenth modification includes a second base material 220N.

The distal end surface of the accommodation convex portion 260N of the second base material 220N is recessed. This concave surface 260N1 is, for example, a flat surface. The electronic component 10 is in surface contact with the recessed surface 260N1, and is sandwiched between the recessed surface 260N1 and the bottom surface 250a of the housing recess 250.

In this way, by bringing the electronic component 10 into surface contact with the housing convex portion 260N, movement of the electronic component 10 can be suppressed more reliably. Further, an edge 260N2 located on the outer periphery of the recessed surface 260N1 protrudes toward the bottom surface 250a of the accommodation recess 250 than the recessed surface 260N1. Therefore, even if the electronic component 10 moves, the amount of movement of the electronic component 10 can be reduced by the electronic component 10 hitting the edge 260N2, and damage such as chipping to the electronic component 10 can be prevented. It can be suppressed.

<Fourteenth modification example>
FIG. 21 is an enlarged cross-sectional view of a non-contact communication medium according to a fourteenth modification. As shown in FIG. 21, a container 200P included in a non-contact communication medium 1P according to the fourteenth modification includes a second base material 220P.

The distal end surface of the accommodation convex portion 260P of the second base material 220P is recessed. This concave surface 260P1 is a flat surface.

In the fourteenth modification, an edge 260P2 located on the outer periphery of the recessed surface 260P1 is in contact with the bottom surface 250a of the accommodation recess 250. The electronic component 10 is completely accommodated in the recessed portion of the housing convex portion 260P.

In this way, the edge 260P2 of the housing convex portion 260P may contact the bottom surface 250a of the housing recess 250. In this case, the accommodation convex portion 260P also functions as a spacer that defines the distance between the first flat surface 210a and the second flat surface 220a. Therefore, according to the non-contact communication medium 1P according to the fourteenth modification, it is possible to suppress variations in the thickness of the adhesive layer 230 among the plurality of non-contact communication media 1P. In other words, it is possible to suppress variations in quality among the plurality of non-contact communication media 1P.

<15th modification example>
FIG. 22 is an enlarged cross-sectional view of a non-contact communication medium according to a fifteenth modification. As shown in FIG. 22, a container 200Q included in a non-contact communication medium 1Q according to the fifteenth modification includes a second base material 220Q.

The accommodation convex portion 260Q included in the second base material 220Q has a plurality of protrusions 260Q1 protruding from the distal end surface. In the fifteenth modification, the electronic component 10 is sandwiched between the plurality of protrusions 260Q1 and the bottom surface 250a of the accommodation recess 250.

Here, an example is shown in which a plurality of protrusions 260Q1 are provided on the distal end surface of the accommodating convex portion 260Q, but the accommodating convex portion 260Q only needs to have at least one protrusion 260Q1.

In this way, the housing convex portion 260Q may have at least one protrusion 260Q1 protruding from the distal end surface. Also in this case, the contact area between the electronic component 10 and the housing convex portion 260Q can be reduced. Therefore, movement of the electronic component 10 can be suppressed while suppressing heat conduction from the second base material 220Q to the electronic component 10.

Further, by providing a plurality of protrusions 260Q1, the accommodating convex portion 260Q and the electronic component 10 come into contact with each other at multiple points. Movement of the component 10 can be suppressed more reliably.

<16th modification example>
FIG. 23 is an enlarged sectional view of a non-contact communication medium according to a sixteenth modification. As shown in FIG. 23, a container 200R included in a non-contact communication medium 1R according to the 16th modification has, for example, a second base material 220Q similar to that of the 15th modification.

Moreover, the container 200R according to the 16th modification has a first base material 210R. The first base material 210R has a housing recess 250R. The accommodation recess 250R has a plurality of protrusions 250R1 protruding from the bottom surface 250a. In the 16th modification, the electronic component 10 is sandwiched between a plurality of protrusions 260Q1 provided in the accommodating convex portion 260Q and a plurality of protrusions 250R1 provided in the accommodating recess 250R.

Here, an example is shown in which a plurality of protrusions 250R1 are provided on the bottom surface 250a of the accommodation recess 250R. However, the present invention is not limited to this, and the accommodation recess 250R may have at least one protrusion 250R1.

In this way, the accommodation recess 250R may have at least one protrusion 250R1 protruding from the bottom surface 250a. Also in this case, the contact area between the electronic component 10 and the housing recess 250R can be reduced. Therefore, movement of the electronic component 10 can be suppressed while suppressing heat conduction from the first base material 210R to the electronic component 10.

Further, by providing the plurality of protrusions 250R1, the housing recess 250R and the electronic component 10 come into contact at multiple points. movement can be suppressed more reliably.

Further, by setting the interval between the protrusions 250R1 so that the electronic component 10 fits between the two protrusions 250R1, positioning of the electronic component 10 can be facilitated.

<17th modification example>
FIG. 24 is an enlarged cross-sectional view of a non-contact communication medium according to a seventeenth modification. As shown in FIG. 24, a housing body 200S included in a non-contact communication medium 1S according to the seventeenth modification has a cushioning material 270S1 on a distal end surface 260a of a housing convex portion 260. Further, the housing body 200S also has a cushioning material 270S2 on the bottom surface 250a of the housing recess 250.

The cushioning materials 270S1 and 270S2 are made of a material having higher flexibility than the first base material 210 and the second base material 220 made of ceramics, such as resin. As such a resin, for example, silicone, amide-based, imide-based, or amide/imide-based resins can be suitably used. Moreover, it is preferable that the cushioning materials 270S1 and 270S2 have heat resistance.

In the seventeenth modification, the electronic component 10 is sandwiched between the housing protrusion 260 and the housing recess 250 via the cushioning materials 270S1 and 270S2. Therefore, even if the container 200S receives an impact, for example, the cushioning materials 270S1 and 270S2 absorb the impact, thereby suppressing the impact from being transmitted to the electronic component 10. Therefore, according to the non-contact communication medium 1S according to the seventeenth modification, damage to the electronic component 10 can be more reliably suppressed.

Here, an example is shown in which the cushioning materials 270S1 and 270S2 are provided in both the housing convex portion 260 and the housing recess 250. The present invention is not limited thereto, and the cushioning materials 270S1 and 270S2 may be provided in at least one of the housing convex portion 260 and the housing recess 250.

<18th modification example>
FIG. 25 is an enlarged cross-sectional view of a non-contact communication medium according to the 18th modification. As shown in FIG. 25, a container 200T included in a non-contact communication medium 1T according to the 18th modification includes a second base material 220T.

The accommodation convex portion 260T included in the second base material 220T according to the eighteenth modification is made of a cushioning material having higher flexibility than the first base material 210 and the second base material 220T.

In this way, the entire housing convex portion 260T may be formed of a cushioning material. Thereby, the accommodation convex portion 260T can be replaced depending on the dimensions of the electronic component 10, for example.

<19th modification example>
FIG. 26 is an enlarged cross-sectional view of a non-contact communication medium according to a nineteenth modification. Further, FIG. 27 is a cross-sectional view taken along the line XXVII-XXVII shown in FIG. 26. As shown in FIG. 26, a container 200U included in a non-contact communication medium 1U according to the nineteenth modification includes a second base material 220U.

As shown in FIGS. 26 and 27, the accommodation convex portion 260U of the second base material 220U has a protrusion 260U1 that protrudes circumferentially from the distal end surface. In the nineteenth modification, the electronic component 10 is sandwiched between the circumferential protrusion 260U1 and the bottom surface 250a of the accommodation recess 250.

In this way, the housing convex portion 260U may have a protrusion 260U1 that protrudes circumferentially from the distal end surface. Thereby, the movement of the electronic component 10 can be suppressed more reliably while reducing the contact area between the electronic component 10 and the housing convex portion 260U.

<Twentieth variation>
FIG. 28 is an enlarged cross-sectional view of a contactless communication medium according to a twentieth modification. As shown in FIG. 28, a container 200V included in a non-contact communication medium 1V according to the twentieth modification has an adhesive layer 230V.

The adhesive layer 230V according to the twentieth modification protrudes from between the first base material 210 and the second base material 220. The adhesive layer 230V protrudes over the entire circumference of the container 200V. Note that the adhesive layer 230V only needs to protrude from at least a part of the circumferential direction of the container 200V.

In this way, since the adhesive layer 230V protrudes from the first base material 210 and the second base material 220, the first base material 210 and the second base material 220 can be bonded more firmly.

<21st modification example>
FIG. 29 is an enlarged cross-sectional view of a non-contact communication medium according to a twenty-first modification. As shown in FIG. 29, a container 200W included in a non-contact communication medium 1W according to the twenty-first modification has a spherical shape. Specifically, the first base material 210W and the second base material 220W have a hemispherical shape. A spherical container 200W is obtained by joining the first base material 210W and the second base material 220W via the adhesive layer 230W.

In this way, by forming the container 200W into a spherical shape without corners, damage such as chipping or cracking of the container 200W can be further suppressed.

<Other variations>
The ceramics constituting the first base material and the second base material are not limited to cordierite. For example, the ceramics constituting the first base material and the second base material include Al ₂ O ₃ (alumina), Si ₃ N ₄ (silicon nitride), SiC (silicon carbide), and Al ₂ TiO ₅ (aluminum titanate). There may be. Further, the ceramic forming the first base material and the second base material may be a crystallized glass such as Li ₂ O--Al ₂ O ₃ --SiO ₂ .

The container preferably has a lightness index L* (value of dimension L representing lightness in Lab color space) of 50 or more. This makes it easier to see dirt attached to the container, making it easier to determine when it is time to replace it. Furthermore, since heat is less likely to be trapped compared to when the lightness index L* is less than 50 (that is, when the color is dark), it is possible to make it difficult for heat to be transmitted to electronic components. Note that the brightness of the container can be adjusted, for example, by using a pigment (see, for example, Japanese Patent No. 5762522 and Japanese Patent No. 5744045).

Further, the first base material and the second base material may have different colors. This increases vertical visibility, making it easier to attach a non-contact communication medium to a component to be monitored. For example, when an operator wants to place an electronic component closer to a component to be monitored, the operator may easily move the first base material containing the electronic component out of the first base material and the second base material. can be specified. Thereby, the first base material can be placed near the components to be monitored.

When the first base material and the second base material are made to have different colors, the color of the first base material in which the electronic component is housed may be brighter than that of the second base material. This makes it possible to improve vertical visibility while making it difficult for heat to be transmitted to electronic components. In addition, it is preferable that the electronic components be far away from members having a low brightness index. This makes it difficult for heat to be transferred to the electronic components.

The electronic component is not limited to an RFID tag, but may be any other electronic component as long as it performs contactless communication. For example, the electronic component may be a sensor with a non-contact communication function. Further, the sensor may be a sensor, such as a temperature sensor, that measures the processing environment of the component to be monitored.

Components to which contactless communication media according to the present disclosure are attached are not limited to components that are plated.

For example, a contactless communication medium according to the present disclosure may be attached to a component such as a slab manufactured in a metal material foundry.

Further, the non-contact communication medium according to the present disclosure may be used for article management in a vulcanization process in a rubber product manufacturing process.

The vulcanization process is a process in which sulfur, peroxide, or the like blended into the raw material is subjected to a chemical reaction over time and temperature to crosslink molecules in order to increase the elastic limit of the rubber-based raw material. Note that pressure may also be applied in the vulcanization process. The temperature in the vulcanization step is, for example, 100°C to 200°C. Further, the pressure in the vulcanization step is, for example, 0.5 MPa to 2 MPa.

As an example, a contactless communication medium according to the present disclosure may be attached to a used tire that is retreaded as a retread tire. Retread tires are obtained by scraping the surface of a used tire, pasting a new rubber sheet on top of it, and then vulcanizing it.

As a vulcanization process for retread tires, a remold method and a precure method are known. The remolding method is a method in which an unvulcanized rubber sheet is bonded to the surface of a used tire and then vulcanized using a mold at high temperature and pressure. Furthermore, the precure method is a method in which a vulcanized rubber sheet is bonded to the surface of a used tire and then vulcanized at low temperature and low pressure in a vulcanizing can. The contactless communication medium according to the present disclosure is applicable to both a remold method and a precure method. In particular, since the precure method is designed for low-volume, high-mix production, there are relatively many manual inspection steps. On the other hand, by managing goods using a non-contact communication medium according to the present disclosure, it is possible to reduce human costs and increase production efficiency of retread tires.

The non-contact communication medium according to the present disclosure is preferably attached to a location other than the tread portion to which the rubber sheet is attached. For example, a contactless communication medium according to the present disclosure may be placed inside a used tire.

Contactless communication media according to the present disclosure may also be attached to medical instruments (eg, forceps, needle holders, etc.).

In the medical field, issues include how to prevent medical instruments from remaining in the body, rationalize the management of medical instruments, and prevent mix-ups of medical instruments during surgery. On the other hand, by attaching the non-contact communication medium according to the present disclosure to medical instruments, it becomes possible to manage individual medical instruments with RFID tags, which can contribute to solving the above problems.

Additionally, the non-contact communication medium according to the present disclosure may be used for marking to identify a lesion site within the body.

A biological dye coloring method is known as a conventional marking method. The biological dye coloring method is a method of coloring a lesion site inside the body discovered during an examination with a dye. However, in the biological dye coloring method, the coloring range is wide and the dye diffuses over time, making it difficult to precisely identify the lesion site. Furthermore, as another marking method, a method has been proposed in which a metal needle or clip is placed in the lesion site. However, this method has problems, such as the need to prepare a CT scan device at the time of surgery, or the risk of more radiation exposure than necessary.

When using the non-contact communication medium according to the present disclosure for marking, first, the non-contact communication medium according to the present disclosure is placed in a lesion site before surgery. Thereafter, during the surgery, the position of the RFID, that is, the position of the lesion site, is estimated by measuring the distance between the RFID tag and the sensor antenna using the sensor antenna.

As described above, when the contactless communication medium according to the present disclosure is used for marking, it is desirable that the contactless communication medium according to the present disclosure is as small as possible since it is left in the body. In this regard, the ceramics constituting the container of the present disclosure has a higher dielectric constant than, for example, resin, and is less likely to interfere with RFID communication. Therefore, the contactless communication medium of the present disclosure can be made smaller than, for example, a contactless communication medium having a resin container.

As described above, the non-contact communication medium according to the embodiment (for example, the non-contact communication medium 1, 1A to 1K) includes an electronic component (for example, the electronic component 10) and a container (for example, the container). 20, 20A to 20H). Electronic components perform contactless communication. The container includes first base materials (for example, first base materials 21, 21C, 21F, 21G, 21H, 21K) and a second base material (for example, second base materials 22, 22A, 22B, 22D, 22E, 22K), and a housing recess (for example, housing recess 25) provided on one flat surface. ), and the housing recess is closed by the other flat surface. The first base material also includes a convex portion (for example, convex portions 26, 26A, 26C) that protrudes circumferentially from a flat surface of the first base material (for example, the first flat surface 21a) so as to surround the accommodation recess. , 26E, 26G). Thereby, it is possible to prevent external liquid or gas from entering through the joint portion of the container.

The convex portion may contact the flat surface of the second base material (for example, the second flat surface 22a). Thereby, it is possible to block the intrusion path of liquid or gas from the outside to the accommodation recess. Therefore, it is possible to more reliably prevent external liquid or gas from entering through the joint portion of the container.

The convex portion may be in surface contact with the flat surface of the second base material. Thereby, it is possible to more reliably prevent external liquid or gas from entering through the joint portion of the container.

The second base material may have a recessed part (for example, recessed parts 27A, 27B, and 27D) at a position facing the convex part on the flat surface of the second base material. Thereby, alignment of the first base material and the second base material can be facilitated in the manufacturing process of the non-contact communication medium.

The width of the concave portion (width W1 as an example) may be smaller than the width of the convex portion (width W2 as an example). As a result, it is possible to form an internal space between the concave portion and the convex portion, in which liquid or gas that has entered from the outside accumulates. It is also possible to suppress inward invasion.

The width of the concave portion may be greater than the width of the convex portion. In this case, since the surface distance of the interface between the flat surface of the second base material and the adhesive layer becomes long, it becomes difficult for liquid or gas entering from the outside to reach the accommodation recess. Therefore, it is possible to further suppress external liquid or gas from entering through the joint portion of the container.

The inner surface of the recess may be curved. In this case, the tip surface of the convex portion may be flat. Thereby, it is possible to increase the surface distance of the interface between the flat surface of the second base material and the adhesive layer, and to form an internal space in the recessed portion in which liquid or gas entering from the outside accumulates. Therefore, it is possible to further suppress external liquid or gas from entering through the joint portion of the container.

The second base material may have a convex part that protrudes circumferentially from the flat surface of the second base material so as to surround the accommodation recess on the outside or inside of the convex part of the first base material. . By alternately providing the convex portions on both the flat surface of the first base material and the flat surface of the second base material, it is possible to further suppress intrusion of external liquid or gas from the joint portion of the container.

The adhesive layer may protrude from the first base material and the second base material. Thereby, the first base material and the second base material can be more firmly joined.

Further advantages and modifications can be easily deduced by those skilled in the art. Therefore, the broader aspects of the invention are not limited to the specific details and representative embodiments shown and described above. Accordingly, various changes may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

1: Non-contact communication medium 10: Electronic component 20: Container 21: First base material 21a: First flat surface 22: Second base material 22a: Second flat surface 23: Adhesive layer 25: Accommodation recess 26: Convex portion

Claims (6)

Electronic components that perform contactless communication,
It has a first base material and a second base material whose opposing flat surfaces are bonded to each other via an adhesive layer, and the electronic component is accommodated in a housing recess provided in one of the flat surfaces, and and a container in which the storage recess is closed by a surface,
The first base material has a convex part that protrudes circumferentially from the flat surface of the first base material so as to surround the accommodation recess,
The second base material has a recessed part on the flat surface of the second base material at a position opposite to the convex part,
The first base material and the second base material are made of ceramics,
The inner surface of the recess is curved,
A non-contact communication medium , wherein the tip surface of the convex portion is flat . The non-contact communication medium according to claim 1 , wherein the width of the concave portion is smaller than the width of the convex portion. The non-contact communication medium according to claim 1 , wherein the width of the concave portion is larger than the width of the convex portion. Electronic components that perform contactless communication,
It has a first base material and a second base material whose opposing flat surfaces are bonded to each other via an adhesive layer, and the electronic component is accommodated in a housing recess provided in one of the flat surfaces, and and a container in which the storage recess is closed by a surface,
The first base material has a convex part that protrudes circumferentially from the flat surface of the first base material so as to surround the accommodation recess,
The second base material has a recessed part on the flat surface of the second base material at a position opposite to the convex part,
The width of the recessed portion is larger than the width of the protrusion,
The inner surface of the recess is curved,
A non-contact communication medium, wherein the tip surface of the convex portion is flat. The second base material has a convex part that protrudes circumferentially from the flat surface of the second base material so as to surround the accommodation recess, outside or inward of the convex part of the first base material. The contactless communication medium according to any one of claims 1 to 4 , comprising: The convex portion contacts the flat surface of the second base material and functions as a spacer that defines a distance between the flat surface of the first base material and the flat surface of the second base material. The contactless communication medium according to any one of claims 1 to 5 .

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