JP2000113154A - Data carrier and production thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data carrier capable of suppressing the destruction of internal parts such as an IC chip even when strong vibration or impulse is applied from the outside. SOLUTION: The data carrier composed of a circuit board 3 packaging an IC chip such as a flash memory for which any backup power source is not required, antenna coil 4 made of copper, for example, arranged while surrounding the circuit board 3, first resin 5 of comparatively hard ABS resin or the like for sealing the antenna coil 4 and second resin 6 of silicon resin composed of materials comparatively softer than the first resin 5 so as to seal the circuit board 3 while surrounded with the first resin 5 is provided. Thus, even when the strong vibration or impulse is applied from the outside to the data carrier, before propagating the impulse from the outside to the circuit board 3, it is attenuated by the second resin 6 composed of soft materials and the destruction of internal contents such as IC chip is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for manufacturing an internal
The present invention relates to a data carrier that has a circuit board on which a C chip is mounted and an antenna and communicates information with an external device in a non-contact manner, and a method of manufacturing the same.

[0002]

2. Description of the Related Art In recent years, a data carrier system has been used as an automatic identification system in which a tag storing identification data is attached to an article, and stored data is read and written via electromagnetic waves or the like. Data carrier systems that access data in a non-contact manner are predominant. Magnetics, inductive electromagnetic fields, and microwaves are transmitted between a data carrier as a responder and an interrogator connected to the host. Communication of information is performed via a transmission medium such as (radio waves).

A data carrier used in this data carrier system includes a circuit board on which an IC chip such as a flash memory as a storage element is mounted, and an antenna made of a copper coil or the like electrically connected to the circuit board. Are provided as internal components, and the circuit board and the antenna are sealed with resin.

By the way, such a data carrier is:
When attached to an article, since it is possible to easily distinguish a plurality of articles, it may be used for dividing the process of the article on the assembly line of the factory or dividing the lot of the article in the warehouse. In such a case, the pallet was used by being attached to a pallet or the like for transporting articles.

[0005]

However, in such a conventional data carrier, if a strong vibration or impact is applied to the data carrier at the time of transporting an article or the like in the above-described use condition, the data carrier is sealed. The impact force is transmitted through the resin material, and the antenna having elasticity may still destroy the IC chip or the like mounted on the circuit board.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a data carrier which can suppress the destruction of internal components such as an IC chip even when strong vibration or impact is applied from the outside. Is what you do.

[0007]

In order to achieve the above object, a data carrier according to the present invention is arranged at a position surrounding a circuit board and the circuit board as described in claim 1. An antenna coil, a first sealing body for sealing the antenna coil, and a material softer than the first sealing body, and the circuit board is positioned at a position surrounded by the first sealing body. A second sealing body for sealing.

According to a second aspect of the present invention, there is provided a data carrier, comprising: a circuit board; an antenna coil arranged so that the circuit board is surrounded from a direction along a substrate surface; A sealing body that seals the circuit board and the antenna coil, and an outer shape of a portion of the sealing body facing both surfaces of the circuit board is thicker than an outer shape of another portion of the sealing body. And a recess recessed in the direction.

Further, according to a third aspect of the present invention, there is provided a data carrier, comprising: a circuit board; and an antenna coil arranged so that the circuit board is surrounded from a direction along a substrate surface. A first sealing member for sealing the antenna coil, and a material softer than the first sealing member for sealing the circuit board at a position surrounded by the first sealing member; And a second sealing body in which the outer shape in the thickness direction of the circuit board is depressed from the outer shape of the first sealing body.

According to a fourth aspect of the present invention, there is provided a data carrier manufacturing method for sealing an antenna coil disposed at a position surrounding a circuit board with a first sealing body. Step 1 and a second step of sealing the circuit board at a position surrounded by the first sealing body with a second sealing body made of a material softer than the first sealing body. It is characterized by:

Further, according to a fifth aspect of the present invention, there is provided a data carrier manufacturing method according to the first aspect, wherein the antenna coil is disposed so that the circuit board is surrounded from a direction along the substrate surface. A first step of sealing with a sealing body; sealing the circuit board at a position surrounded by the first sealing body; and sealing the outer shape of the circuit board in a thickness direction with the first sealing. A second step of forming a second sealing body of a material softer than the first sealing body, the second sealing body being recessed from the outer shape of the body.

According to the present invention, the circuit board on which the IC chip or the like mounted at the position surrounded by the antenna coil is mounted is sealed with a material softer than the material for sealing the antenna coil. Therefore, even when strong vibration or shock is applied to the data carrier from the outside, the impact force from the outside is attenuated before it is transmitted to the circuit board by the sealing body made of a soft material, and internal components such as IC chips are Destruction will be suppressed.

Further, according to the present invention, the antenna coil is arranged so that the circuit board is surrounded from the direction along the surface of the board, and these are sealed by the sealing body. The outer shape of the part facing both sides of the board is
Since it is formed in a shape that is recessed in the thickness direction of the circuit board from the outer shape of other parts of the sealing body, even when vibration or shock is applied to the data carrier, the impact force is directly applied to the circuit board through the sealing body. As a result, the internal components such as the IC chip are prevented from being broken.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a data carrier according to an embodiment of the present invention, FIG. 2 is a plan sectional view of the data carrier, FIG. 3 is a side sectional view of the data carrier,
FIG. 4 is a block diagram schematically showing this data carrier.

This data carrier can read and write stored data through electromagnetic waves or the like without contact. As shown in FIGS. 1 to 4, this data carrier which is a transponder does not require a backup power supply. EEPROM
And a transmission circuit as a transmission / reception unit 2 for controlling transmission of information to and from an external device as an interrogator.
A circuit board 3 on which a C chip is mounted, and an antenna coil 4 made of, for example, copper, which is arranged at a position surrounding the circuit board 3
A relatively hard first resin 5 for sealing the antenna coil 4, and a material relatively softer than the first resin 5, that is, a material having a smaller longitudinal elastic coefficient (Young's modulus) than the first resin 5. And a second resin 6 for sealing the circuit board 3 at a position surrounded by the first resin 5.

Examples of the first resin 5 include ABS (acrylonitrile-butadiene-styrene copolymer) resin, vinyl chloride resin, PET (polyethylene terephthalate) resin, and phenol resin.

On the other hand, examples of the second resin 6 include, in addition to silicone resin and the like, particularly soft materials of thermosetting materials such as rubber.

Here, a method of manufacturing the data carrier according to the present embodiment will be described with reference to FIGS.

First, as shown in FIG. 5, a relatively hard first resin 5 such as an ABS resin is molded with the antenna coil 4 sealed therein. At this time, the lead wire 7 is exposed from the antenna coil 4. Next, FIG.
As shown in (2), the lead wire 7 of the antenna coil 4 and the module provided on the circuit board 3 are connected by soldering.
As shown in FIG. 7, a relatively soft second resin 6 such as a silicone resin is filled inside the first resin 5. As shown in FIG. 8, the second resin 6 is thermally cured in a state where the antenna coil 4 and the circuit board 3 are completely sealed.

According to the data carrier manufactured in this manner, the circuit board 3 on which the IC chip or the like, which is arranged at a position surrounded by the antenna coil 4, is mounted. Since the second carrier 6 is sealed with the second resin 6 which is relatively softer than the resin 5, even when strong vibration or shock is applied to the data carrier from the outside, the second resin 6 made of a softer material allows The external impact force is attenuated before being transmitted to the circuit board 3, and I
Destruction of internal components such as the C chip is suppressed.

Next, another embodiment of the present invention will be described.

FIG. 9 is a perspective view showing a data carrier according to the present embodiment, FIG. 10 is a plan sectional view of the data carrier, and FIG. 11 is a side sectional view of the data carrier. As shown in these figures, this data carrier is:
The circuit board 3, the antenna coil 4 arranged so that the circuit board 3 is surrounded from the direction along the board surface, and the first resin of the above-described embodiment for sealing the circuit board 3 and the antenna coil 4 5 and a third resin 8 of the same material as
The outer shape of the portion of the resin 8 substantially opposed to both surfaces of the circuit board 3 is formed by a concave portion 9 which is recessed in the thickness direction of the circuit board 3 from the outer shape of the other portion of the third resin 8.

According to the data carrier of the present embodiment configured as described above, the antenna coils 4 are arranged so that the circuit board 3 is surrounded from the direction along the board surface, and these are coiled by the third resin 8. In addition to being sealed, the outer shape of the portion of the third resin 8 facing the both surfaces of the circuit board 3 is recessed in the thickness direction of the circuit board 3 from the outer shape of other portions of the third resin 8. As a result, even when vibration or impact is applied to the data carrier, the impact force is not directly transmitted to the circuit board 3 through the third resin 8 and is dispersed.
Destruction of internal components such as the C chip is suppressed.

In the data carrier of this embodiment, the circuit board 3 and the antenna coil 4 are both sealed with the third resin 8 of a relatively hard material.
The resin of the portion for sealing both surfaces of the circuit board 3 may be made of the same material as the second resin 6 which is relatively soft in the above-described embodiment.

[0026]

As described above, according to the present invention,
Since the circuit board on which the IC chip or the like mounted at the position surrounded by the antenna coil is mounted and sealed with a material softer than the material sealing the antenna coil, strong vibration or impact from the outside is generated. Even when it is applied to the data carrier, the sealing body made of a soft material attenuates an external impact force before it is transmitted to the circuit board, thereby suppressing the destruction of internal components such as an IC chip.

Further, according to the present invention, the antenna coil is arranged so that the circuit board is surrounded from the direction along the surface of the board, and these are sealed by the sealing body. The outer shape of the part facing both sides of the board is
Since it is formed in a shape that is recessed in the thickness direction of the circuit board from the outer shape of other parts of the sealing body, even when vibration or shock is applied to the data carrier, the impact force is directly applied to the circuit board through the sealing body. As a result, the internal components such as the IC chip are prevented from being broken.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a data carrier according to an embodiment of the present invention.

FIG. 2 is a sectional plan view of the data carrier of FIG. 1;

FIG. 3 is a side sectional view of the data carrier of FIG. 1;

FIG. 4 is a block diagram schematically illustrating the data carrier of FIG. 1;

FIG. 5 is a view showing a state where the first resin of the data carrier of FIG. 1 is molded.

FIG. 6 is a diagram showing a state where an antenna coil of the data carrier of FIG. 1 and a circuit board are connected;

FIG. 7 is a view showing a process in which a second resin is filled inside the first resin of the data carrier of FIG. 1;

FIG. 8 is a diagram showing a state where the data carrier of FIG. 1 has been completely filled with a second resin and has been thermally cured.

FIG. 9 is a perspective view showing a data carrier according to another embodiment of the present invention.

FIG. 10 is a plan sectional view of the data carrier of FIG. 9;

FIG. 11 is a sectional view of the side surface of the data carrier of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Memory 2 ... Transmission / reception part 3 ... Circuit board 4 ... Antenna coil 5 ... 1st resin 6 ... 2nd resin 7 ... Lead wire 8 ... 3rd resin 9 ... Concave part

Claims (5)

[Claims] 1. A circuit board, an antenna coil disposed at a position surrounding the circuit board, a first sealing body for sealing the antenna coil, and a material softer than the first sealing body The first
And a second sealing member for sealing the circuit board at a position surrounded by the sealing member. 2. A circuit board, an antenna coil arranged so that the circuit board is surrounded from a direction along a surface of the board, a sealing body for sealing the circuit board and the antenna coil, Data comprising: a stopper having a shape in which the outer shape of a portion substantially opposing both surfaces of the circuit board of the stationary body is recessed in the thickness direction of the circuit board with respect to the shape of other portions of the sealing body. Career. 3. A circuit board; an antenna coil disposed so as to surround the circuit board from a direction along a substrate surface; a first sealing body for sealing the antenna coil; Made of a material softer than the sealing body of
And sealing the circuit board at a position surrounded by the sealing body, wherein the outer shape in the thickness direction of the circuit board is depressed from the outer shape of the first sealing body. A data carrier comprising a body. 4. A first step of sealing an antenna coil disposed at a position surrounding the circuit board with a first sealing body, and the circuit board at a position surrounded by the first sealing body. And a second sealing member made of a material softer than the first sealing member. 5. A first step of sealing an antenna coil disposed so that a circuit board is surrounded from a direction along a surface of the board by a first sealing body; The circuit board is sealed at the position to be surrounded, and the outer shape in the thickness direction of the circuit board is
Forming a second sealing body of a material softer than the first sealing body, depressed from the outer shape of the sealing body.