TW200809640A - Magnetic sheet, antenna system, and method of manufacturing antenna system - Google Patents

Abstract

An antenna device is provided having high rigidity and superior communication property even though using fragile ferrate sinterings. The antenna module has a magnetic core formed by laminating ferrate sinterings, and the magnetic core covers the antenna core packaged on the antenna substrate. The ferrate sintering satisfies a condition of 2 < D/A, 0 < L1 < 5x2 1/2, and 1≤ L1/L2 ≤ 2, where D[μm] is thickness, A [mm2] is the main surface area, L1 is long axis length and L2 is short axis length.

Description

200809640

达达编号号: TW3751PA IX. Description of the Invention: [Technical Field] The present invention relates to a magnetic sheet suitable for a 1C card and a 1C label, and to a method of manufacturing an antenna device and an antenna device. [Prior Art] Conventionally, a system for personal management called RFID (Radio Frequency IDentification) has attracted attention from various industries. The technology of this RFID system is a small non-contact integrated circuit that can read/write various data and has a sfl function.

The circuit, the 1C) component transmitter and the predetermined reader/writer, communicate wirelessly, whereby the transmitter reads and/or writes the data in a non-contact manner. Such an RFID system, for example, is constructed by using a transmitter as a 1C tag, by installing the ic tag on a product for production and logistics management; in addition to this use, it is also suitable for constructing an ic card for the transmitter frame, _ It is used as a fee collection and identity certificate for a transportation agency, or for various purposes such as an electronic wallet. Here, it is generally known that the 1C chip for memory information and the capacitor for resonance are electrically connected to the antenna coil as an IC card and an Ic tag. The Zhuang architecture, for example, transmits radio waves of a specific frequency to the antenna coil from the transceiver antenna of the reader/writer to read the signals transmitted in the IC chip, or whether the radio waves of a specific frequency cause resonance; * Come to bet identification or surveillance. In addition, most of the 1C card and IC tags can be used to compose information stored in the 1C chip, or to write history information, etc. 200809640

Sanda number: TW3751PA @ shows an antenna module as the IC card and Ic tag, and the soft magnetic material is inserted into the spiral coiled antenna coil on the plane so as to be substantially parallel to the plane of the antenna coil (for example) Reference Patent Document U. In such an antenna module, a soft magnetic material composed of an amorphous sheet and an electromagnetic steel sheet is inserted so as to be substantially parallel to the plane of the antenna coil, thereby reducing the thickness of the entire antenna module. However, in this case, the group is made up of non-commercial wafers and electromagnetic steel sheets. The carrier frequency is just _ left and right (four), and the usable Q value is obtained. However, the carrier frequency is in the number. In the high frequency range from MHz to tens of MHz, the current is generated on the non-crystalline sheet and the electromagnetic steel sheet of the soft magnetic material, which causes the problem of the Q value to decrease. Therefore, the antenna module cannot be applied to The IC card and IC tag of the RFID technology operating at 13.56 MHz carrier frequency. (4) Since the prior art, it has been known that the ferrite (f with te) sintered body is a soft magnetic material that can respond to high frequencies. Because ferrite • burn In the case where the thickness of the 1C card and the 1C label is required to be thinner in recent years, it is easy to be broken and the impact resistance is extremely low. A soft magnetic metal, amorphous, or flake-like ferrite powder and a plastic or rubber composite form a soft magnetic material, thereby being compared to the case of using a fragile ferrate sintered body. The rigidity is high and can be used at a higher frequency (for example, refer to Patent Document 2). Further, Patent Document 3 discloses an antenna module configured to stack an antenna coil and a ferrite sintered body, wherein the antenna coil Full roll 200809640

Sanda number: TW3751PA is bent in a plane, and the perferrate sintered body is arranged to be slightly parallel to the plane of the antenna coil. Further, since the antenna coil described in Patent Document 2 is incorporated in various communication devices, it is likely to be affected by the metal article when there is a metal object in the vicinity of the identification article. In order to avoid this effect, a technique has been proposed in which a metal shielding plate is attached to the back surface (covering surface) of the communication surface to suppress variations in the communication characteristics of the metal article. However, in this technique, although the shielding plate is used to suppress variations in the communication characteristics of the antenna coil, conversely, the communication characteristics of the antenna coil are also lowered to a certain level due to the shielding plate. Patent Document 1: JP-A-2000-48152, Patent Document 2: JP-A-2002-325013, Patent Document 3: JP-A-2000-113142, at present, a 1C card using RFID technology operating at 13.65 MHz carrier wave In the 1C tag, it is required to realize a time-out action environment in which a communication distance of only a long distance and a wide planar communication area when facing the reader/writer are realized. However, in the antenna coil described in the above Patent Document 2, it is confirmed that the communication characteristics are deteriorated compared to the antenna coil of the same configuration using the ferrite sintered body as the soft magnetic material. Therefore, it is desirable to realize an antenna module using a ferrite sintered body having good communication characteristics. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a magnetic sheet and an antenna package.

Sanda number: TW3751PA and the manufacturing method of the antenna device, which can achieve high rigidity even with a fragile tantalum ferrite sintered body, and can achieve excellent dip characteristics. The applicant of the present invention has completed the present invention by carefully studying the ferrite sintered body to achieve a high rigidity and excellent communication characteristics of the ferrite sintering noise. That is, the present invention proposes a magnetic sheet, a magnetic sheet, in which a gas is laid to form a plurality of flat ferrite sintered bodies. When the thickness of the sintered body is DUm], the area of the main surface is A [mm2], and the length of each bite is L1 and the length of the minor axis is L2, the following conditions are satisfied: 2 D/A ' 〇&lt; L1 &lt; 5χ21/2, and 1 $ L1/L2 $ 2. In the magnetic sheet of the present invention, since the deficiency of the ferrite sintered body is less than a predetermined value, it is possible to maintain good communication characteristics, i.e., it is difficult to break or break, and it is difficult to bend. In particular, the above-described perferrate sintered body has a thickness of 50/zm or more and less than 55 in one side of the main surface from the viewpoint of satisfying the communication viewpoint and the thinning requirement. 〇 // m. The negative and the plurality of the ferrite sintered bodies are preferably formed by a bonding agent composed of a material having a slight loss and a small loss, and the electric constant is less than 5. . The low dielectric material is composed of a mixture; and the plurality of the ferrite sintered bodies may be a laminate in which a plurality of layers are stacked on the magnetic sheet. The magnetic sheet of the present invention: ~ The case of the material group 'According to the number of layers of the ferrite sintered body, 200809640

Sanda number: TW3751PA (four) inductance value 'can change the communication distance. That is to say, the second aspect of the present invention can greatly improve its design freedom by corresponding to the communication characteristics of various parts. Next, the ferrite sintered bodies are reduced in waste, and it is preferable that the filling is laid in the same plane to produce a gap. In addition, 'there may be gaps in the shape of the main surface of the 火 ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ The body is not caused to have a gap, or a mixed magnetic powder coil may be added between the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _彳πϊ County has the antenna coil; - magnetic sheet, the board is shaped like a plate, and the antenna is coiled, and the antenna coil, wherein the antenna substrate and the magnetic body are separated by the shuttle person. It is also the mutual respect of each other's main faces. When the area of the main surface of the ferrite sintered is A[mm2], the long axis, the sub-...., when the melon is L2, the full length is nine: the length is U and the length of the short axis--&lt;u&lt;sx2- In the antenna device of the invention, since the main surface of the ferrite sintered body is fixed to a value of 1:, it is possible to maintain good communication characteristics, and it is difficult to be broken or broken even if it is thin, and it is difficult to bend. In the day of the present invention, the towel is placed on the opposite side of the main surface joined to the celestial board, and the metal cover can also be joined.

In the antenna device of the present invention, even if a metal article is present on the article mounting portion of the object to be mounted, it is not affected by the metal article. Further, the state in which radio waves generated during the operation of the antenna coil intrude into the mounted body can be prevented by the shielding plate, and the erroneous operation of the mounted body can be prevented. Further, in the antenna device, by providing the shielding plate, even if the amount and arrangement of the metal articles on the mounting portion of the mounted body are different, the variability of the antenna coil can be eliminated, and a stable communication product can be ensured. quality. Further, the antenna device of the present invention may be configured to form a 1C wafer in which the antenna coil is privately connected to the outside, or a 1C wafer mounting surface may be formed on the antenna substrate, and the antenna coil may be electrically connected to the above-mentioned antenna coil. In the antenna device of the present invention, in the antenna device of the present invention, since the former structure is not required, the built-in 1C wafer can be made thinner, and in the latter structure, since it is not required to be 1C Since the external connection of the wafer is performed, the degree of freedom in design can be improved, and the mounting work on the mounted body can be easily performed. The present invention further provides a method of manufacturing an antenna device having an antenna coil. The manufacturing method comprises: encapsulating an antenna coil on an antenna substrate, and laying a plurality of flat ferrite burns, a body to cover the antenna coil; and stacking the ferric acid in a thickness direction by a predetermined bonding agent a salt sintered body; and a predetermined metal shield plate joined to the stacked ferric acid 2 sintered bodies. When the thickness of the sintered body of the 酉 盐 salt is D [ # m], the area of the main surface is |1, the length of the axis is L1, and the length of the short axis is L2, the following conditions are satisfied ^ 200809640

Sanda number: TW3751PA 2 &lt; D/A, and 〇 &lt; L1 &lt; 5χ21/2, and IS L1/L2 $ 2. In the method of manufacturing the antenna device of the present invention, since the size of the main surface of the ferrite sintered body is smaller than a predetermined value, the antenna can be manufactured, which can maintain good communication characteristics and is difficult to be broken even if the thickness is thin. Broken, it is also difficult to bend. Further, in the method of manufacturing the antenna device of the present invention, since the ferrite sintered body is laid and manufactured, the step of demolding the ferrite sintered body (taken out from the mold) is not required, and the mold release is not caused. The problem of cracking can reduce waste materials' and can increase the yield. According to the present invention, since the size of the main surface of the ferrite sintered body is made smaller than a predetermined value, even if a ferrite sintered body of a fragile material is used, high rigidity can be achieved and excellent Communication characteristics. [Embodiment] Next, a specific embodiment to which the present invention is applied will be described in detail with reference to the drawings. φ This embodiment is an antenna module used in a so-called KJPID (Radio Frequency IDentification) system, which can read and/or write to memorize various materials and has a communication function 'with a predetermined reader/write Communication is performed between the devices, whereby the reader/writer is used to read and/or write data in a non-contact manner. In particular, the antenna module is formed into a thin plate shape for an IC (Integrated Circuit) card or a 1C tag, and has high rigidity even when ferric acid is used as a magnetic core member. 200809640

Erda No.: TW3751PA An antenna module, as shown in the plan view of Fig. 1A and the side view of Fig. 1B, is not equipped with the following state: the antenna substrate 10 in which the antenna coil is packaged and the core member as the magnetic sheet 20, joining each other's main faces. As shown in FIG. 1A, the antenna substrate 10 includes a base film 11 made of a predetermined insulating material and an air core coil portion 12 as an antenna coil, and the + antenna system is formed in a (four) roll shape on the surface of the base film u. The composition of copper or Ming. The main surface of the base film 11 as a communication surface is formed in a slightly rectangular sheet shape. The base film 11 can be used regardless of the type of material used as a base material of a printed circuit board. Specifically, as the base film 11, a so-called rigid substrate such as a paper phenol substrate specified by the National Electron Manufacturers Association (NEMA) symbol XXP, XPC, etc., and the same mark FR_2 can be used. Paper polyester substrate, paper epoxy substrate specified by the same mark fr-3, cellophane composite epoxy substrate specified by the same symbol CEM-1, glass non-woven paper composite epoxy substrate specified by the same -φ mark CHE-3 The glass cloth epoxy substrate specified by the same mark Gl〇 and the glass cloth epoxy substrate specified by the same mark FR-4 are applied to a predetermined conductor foil of a copper box or aluminum on one or both sides, and have self Supportive. Further, as the base film 11, for example, a flexible resin film such as polyimide, PET, or PEN can be used. On the surface of the base film 11, the hollow core coil body 12 composed of the radiation electrodes is exposed. Specifically, on the antenna substrate 10, the hollow core coil portion 12 which is bent along each side of the base film 11 is formed on the surface of the base film u. 12 200809640

The third wire number: TW3751PA is electrically connected to the signal lines 13a, 13b at the innermost end side of the thirsty coiled core coil portion 12 and the outermost peripheral side of the hollow core coil portion 12; and the signal line 13a And 13b is provided on the joint portion 11a formed in a part of the base film 11. The antenna substrate 10 is electrically connected to the unillustrated external 1C wafer through the signal lines 13a, 13b. In addition, 1 (: the wafer is, for example, a capacitor for smoothing and smoothing, a diode bridge, a CPU (Central Processing Unit), a ROM (Read Only Memory), and an EEPROM.

(Electrically Erasable Programmable Read Only Memory) A circuit in which various components of the function of the antenna module are integrated into a single-half conductor chip. Further, on the base film 11, a through hole may be provided for electrically connecting the surface and the back surface. Further, the surface and the back surface of the base film u are preferably covered with a covering material of a predetermined insulating material to protect the antenna substrate. On the other hand, as shown in Fig. 2, the core member 20 is a magnetic sheet which is formed by laminating a plurality of flat plate-shaped ferrite sintered bodies 21. The perferrate sintered body 21 is disposed so as to be laid so as to cover the hollow core portion 12 of the antenna substrate 1 and the shape of the periphery thereof. For example, as shown in the figure, the barium ferrite strontium sintered body 21 is disposed in a state of being laid in a checkerboard shape when the main surface thereof is square. Further, the ferric acid sintered body 21 may be formed by stacking a plurality of layers and a laminate in the thickness direction of the core member 2A. The perferrate sintered body 21 is weakly imparted by the outside world and has a strong magnetization property. Therefore, even if the hollow core coil has a metal object around it, the metal object can be absorbed without leaking a magnetic field. 13 200809640

ΐ达号·· TW3751PA Here, the size of each of the perferrate sintered bodies 21 will be described later in detail, but it was developed by the inventor of the company after research. Further, the main surface of the ferrite sintered body 21 is not particularly limited in shape, for example, a polygonal shape, an elliptical shape, a circular shape, or the like, and may be any shape if it satisfies a predetermined size condition. Further, in the core member 2, from the viewpoint of reducing the demand for waste materials and thinning, it is preferable to fill the ferrite-sintered body 21 so that no gap is formed in the same plane. However, if the main surface of the ferrite sintered body 21 is elliptical or round, if it is laid in the same plane, a gap may occur. In this case, in the magnetic core member 2, the navigable salt sintered body 21 is piled up in different stages in such a manner that no gap is generated, or the majority of the copper-plane (10) is set to be over the money body 21, The addition of a combination of bismuth magnetic powder is used as a double-sided tape for bonding a plurality of ferrite sintered bodies 21 to each other, "adhesive agent or ultraviolet ray followed by: = two. In addition, in the magnetic core The component 20 can also be sealed by using a predetermined sealant in the state of the iron:::: state. As a result of the connection, the material which is less affected by the electromagnetic wave penetration loss is U. In other words, it is preferable to use a low dielectric material. The state of drought is less than 500 === The sintered body 21 is in the so-called _ ((4) read and bend in the pile · 3, ^ into 'but because thick and thin' When the money is formed, it will bend. When the four curves are in the pile of ferrite sintered body 21, the combination of η and large will also lead to the overall antenna mode: thicker: the desired one. In addition, the bending will also Trigger; split 14 200809640

Erda number: TW3751PA problem. Therefore, the curvature of the ferrite sintered body 21 is preferably reduced to less than half the thickness of the ferrite sintered body 21. Specifically, it is more preferable to set the thickness of the over-acid salt sintered body 21 to 20% or less. However, the size of the main surface of the ferrite sintered body 21 is generally smaller than a predetermined value by setting it to satisfy a predetermined condition as will be described later. Therefore, in the green sheet state, the ferrite sintered body 21 which is cut and fired at this size also becomes difficult to bend. The antenna film group including the antenna substrate 10 and the core member 20 is used, for example, as a non-contact type product identification tag, or as a part of a communication unit in a communication device, as will be described later. In this antenna module, the perovskite sintered body 21 is formed into a predetermined size as described above. That is, when the thickness of the ferrite sintered body 12 is D|&gt;m], the main surface area is A [mm2], the long axis length is L1 [mm], and the short axis length is L2 [mm], It satisfies 2 &lt; D &lt; A, and 0 &lt; L1 &lt; 5χ21/2, and 1 SL1/L2 £2. Further, the length of the long axis means the length of the longest portion among the straight portions dividing the main surface of the ferrite sintered body 21. In addition, the length of the short axis means the length of the shortest portion of the portion where the straight portion of any two vertices is connected and the long axis intersects when the main surface of the ferrite sintered body 21 is polygonal. Specifically, when the main surface of the ferrite sintered body 21 is a square as shown in Fig. 3, a portion indicated by a in the same figure is a long axis, and a portion having a formula b in the same figure is a minor axis. L1/L2 = 21/2 = V2. When the main surface of the ferrite sintered body 21 is a rectangular shape as shown in Fig. 3B, the portion indicated by a in the same figure is a long axis, and the portion indicated by b in the same figure is a short axis. Furthermore, the main body of the ferrite sintered body 21 15 200809640

When the surface of the TW3751PA is a rectangle as shown in Fig. 3C, the major axis diameter is the length of the major axis, and the minor axis diameter is the length of the minor axis. Further, when the main surface of the ferrite sintered body 21 is circular, both the major axis and the minor axis are diameters, and L1/L2 = 1. Specifically, as the ferrite sintered body 21, when the main surface thereof is square, one side is less than 5 [mm], and the thickness is 50 [μιη] or more but less than 550 [μπι]. to realise. Here, the reason why the lower limit of the thickness is 50 [μπι] is that the critical value of the magnetic properties of the perovskite sintered body 21 can be 50 [μm] from the viewpoint of the communication distance. In addition, the reason why the upper limit of the thickness of 10 degrees is set at 550 [μπι] is that the antenna module is required to be thinner. The antenna module including the core member 20 using the ferrite sintered body 21 can be used, for example, as a non-contact type product identification label. In this case, the predetermined identification tribute associated with the article as the object to be mounted is recorded in the 1C wafer connected to the antenna module. In the antenna module, the antenna module is attached to the article to be identified by a pressure sensitive (pressure sensing) adhesive film or the like attached to the side surface of the ferrite sintered body 21. Then, during the process of transporting the goods and the management of the inventory, the antenna module receives the communication wave recorded on the 1C chip according to the communication wave transmitted by the reader/writer not shown. The product in the newsletter' and transfer the information to the reader/writer. Since the ferrite sintered body 21 is attached between the product and the hollow core coil portion 12 in the antenna module of the product, the inductance value can be prevented even when the coated surface of the product is made of metal. reduce. Thereby, the antenna module can generate a predetermined feeling by using the air core coil portion 12 16 200809640

Sanda number: TW3751PA should be voltage, and by transmitting the induced voltage to the IC chip, the reader/writer will surely read the identification data. In addition, the antenna module can be mounted in a communication machine as a mounted body. In addition, as a communication device said here, it is preferably called a portable telephone and a personal digital assistant (PDA).

The portable wireless communication terminal has a built-in communication unit for reading 1C recording media such as an IC card and a 1C tag, and writing the 1C recording medium. In this case, the antenna module is used as part of the communication unit and is installed in the communication machine. Specifically, as shown in Fig. 4, the antenna substrate 10, the magnetic core member 20, and the metal shield plate 30 are stacked in the order of the main surface, and the main surfaces are joined to each other. Further, the metal shield plate 30 is made of aluminum, copper, iron, stainless steel, magnesium alloy or the like, and is bonded to the main surface opposite to the main surface of the core portion 20 bonded to the antenna substrate 10 by a double-sided tape. The antenna module can be manufactured by laying a plurality of ear sintered bodies 2 to cover the antenna substrate 1 〇, in the heart coil "section 12; as needed, through a predetermined bonding agent, gold! @Many per-ferrate sintered body 21, and a predetermined module is joined to the ferrite sintered body 21. Therefore, the shielding plate 3 on the antenna side (the side of the cymbal is the same as the : f = : : = = = = = 板 板 板 板 板 板 f f f f f f f f f f f f 接 接 接 接 接 接 接 接 接 接 接 接In the installation of the riding machine, the 'wave pair generated during the operation of the antenna coil in the antenna module 17 200809640

II 逹 number: TW3751PA The phenomenon of communication machine intrusion can be blocked by the shielding board and can prevent the communication machine from malfunctioning. Here, a metal object 41 such as a frame member of the communication device and a wiring component is usually provided around the mounting portion 40 and on the upper surface thereof. That is to say, most of the antenna modules are mounted in the communication machine while being surrounded by the gold object 41. Therefore, in the antenna module, even in the case where the metal object 41 exists between the mounting portion 40 of the communication device, since the communication wave radiated to the hollow core coil portion 12 can be absorbed by the ferrite sintered body 21 10 , Therefore, the leakage magnetic field to the side of the metal object 41 can be suppressed. Therefore, in the antenna core group, the generation of the eddy current caused by the leakage magnetic field of the metal object 41 can be suppressed, and the deterioration of the communication characteristics can be prevented. Further, in the antenna module, by providing the shielding plate 30, even when the number and arrangement of the metal objects 41 on the mounting portion of the communication device are different, variations in the influence of the antenna coil can be eliminated, and it is possible to ensure Stable communication features. That is to say, in the antenna module, by providing the shielding plate 30, regardless of the setting environment of the antenna coil, the desired communication characteristics can be exerted. ^ Embodiments The applicant actually de-architects the antenna module and It was mounted on a commercially available mobile phone (S0506ic, manufactured by Sony Ericsson Mobile Communications Co., Ltd.), and subjected to a drop test. The state of the ferrite sintered body at this time was investigated, and the communication characteristics were measured. As shown in Figure 6, to install the antenna module 50 to carry 18 200809640

Erda Machining: TW3751PA

The tape is placed on the side of the antenna module 50, and the side of the antenna module 50 is placed on the lower side. The portable phone is placed in a vertical state, and the upper side of the portable phone 60 in which the antenna module 50 is not disposed is predetermined. The jig 7 is fixed, and this state is the initial state before the drop. Then, in the initial state, the portable telephone 60 was naturally dropped five times from the height of i50 cm, and then the sample tape telephone 60 was decomposed, and the antenna module was taken out to confirm the state of the ferrite sintered body. The state was classified into a case where the ferrite sintered body was not broken, a case where the perovskite sintered body had a cracked notch, and a case where the crack was broken, and the three types were evaluated as "χ". In addition, at the drop point, a hard plastic plate having a thickness of 2 mm and a hardness of 98 or more (D type hardness meter) is laid on the upper surface of the concrete floor. Further, in the ferrite sintered body, the following four conditions are satisfied, and the main surface is a square of L2 [mm] xi 2 [mm], the thickness is 130 [μΐΏ], and the main surface is 3 [mm] x ” The square of the melon is 300 [μιη], the main surface is 丨.4111111] x 丨 4 [mmw square and thickness = 190_ and the main surface is 2 [mm] x 2 [mm] square and thickness = 4 〇〇[μιη]. In addition, the ferrite sintered body used as a comparative example has the following two squares whose main surface is 5 [mm] x 5 [mm] and has a thickness of 130 [(4), and the main surface is away m] x 1Q [coffee] square and thickness second, as a bonding agent for bonding a plurality of ferrite sintered bodies to each other, a double-sided tape cutting adhesive is prepared. The results are shown in Tables i to 3. ^ Table 1 Example Embodiment 2 Example 3 Example 4 19 200809640

Erda number: TW3751PA Perrrate size 1.2mm X 3mm χ 3 mm 1.4mm χ 2mm χ 2mm 1.2mm 1.4mm Perrrate thickness 130μιη 300μπι 190μπι 400μιη Impact resistance 〇〇〇〇 adhesive double-sided tape double sided Tape 矽 adhesive, 矽 based adhesive layer number 1 1 1 1 Communication distance 106.5mm 129.0mm 108.0mm 131.0mm

Table 2 Example 5 Example 6 Example τ Example 8 Permanate size 1.2 mm χ 1.2 mm χ 1.2 mm χ 1.2 mm χ 1.2 mm 1.2 mm 1.2 mm 1.2 mm Perferrate thickness 130 μπι 130 μιη 130 μπι 130 μιη Impact resistance Barium adhesive, bismuth adhesive, double-sided tape, double-sided tape, double-sided tape layer 2 3 4 5 communication distance 127.5mm 130.0mm 132.5mm 136.0mm Table 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Permanate size 5mm χ 5mm 5mm χ 5mm 5mm χ 5mm 5mm χ 5mm Perrender thickness 130μπι 130μπι 130μιη 130μιη Impact resistance Δ X Δ X Adhesive double-sided tape Double-sided tape 矽-based adhesive 矽-based adhesive 20 200809640 Sanda number: TW3751PA Number of layers 1 1 1 1 Communication distance 106.5mm 106.5mm 106.5mm 106.5mm As can be seen from Table 1 above, an antenna module composed of a ferrite sintered body satisfying the above conditions is known (Example 1 None of the examples 4) were broken, resulting in a high rigidity. Further, in the first to fourth embodiments, there is no practical problem in the communication distance. On the other hand, as can be seen from the above Table 3, any of the antenna modules (Comparative Examples 1 to 4) which were formed using the ferrite sintered body which did not satisfy the above conditions was broken, and the rigidity was low. Next, when the superferrate sintered body used in Example 1 was stacked, the communication distance was changed to carry out the measurement, and the results are as shown in Table 2 above. The following results are obtained: as the number of layers is larger, the inductance value When it becomes larger, the Q value also becomes larger, and the communication distance becomes longer. As a result of the above, in the antenna module, the ferrite sintered body of the size satisfying the above conditions is used to stack the ferrite sintered body in the thickness range required for the antenna module, whereby the rigidity can be high. And excellent communication characteristics. As described above, the antenna module of the embodiment of the present invention can realize the high rigidity of the ferrite sintered body of the fragile material by defining the size of the ferrite sintered body, and can also achieve high rigidity. Excellent communication characteristics. Further, the present invention is not limited to the above embodiment. For example, in the above embodiment, the antenna module is described in a form electrically connected to an external 1C chip. However, the present invention even mounts an IC chip on an antenna 21 200809640

Erda number: TW3751PA on the substrate, can also be applied. One, physical. As shown in the plan view of Fig. 7A and the 仞 of Fig. 7B, it may be a side view having ΙΓ3, and the antenna module is constructed as (4) 15 as a group. In other words, the antenna base (u-e) resin of the slope surface of the base plate member of the plate (four) is divided into two parts, and for example, a carbamic acid gamma surface is provided, and the wafer substrate is mounted on the 1c wafer. Both the 1C wafer 15 and the both ends of the open portion 12 are electrically connected. Such an antenna module is used for the communication of the non-contact type of product touch (four) sign and the communication machine H. In other words, the antenna module is assembled into a communication machine field, as shown in Fig. 8, to the antenna substrate 10 , the magnetic core material 2 〇 = system cover f, then the stalk is stacked and the city is arranged with the main surface joined. Then, as shown in the previous FIG. 5, the antenna base is reversed to 1G, and the side of the shielding plate 30 on the opposite side is used as a covering surface. By installation, the pressure-sensitive property of the surface of the shielding plate 3G is followed by A film or the like is attached to the mounting portion 40 formed on the communication or the machine. In addition, the 1C chip mounting portion can be placed (4) on the antenna substrate 1. The side of the communication side. However, in the antenna module, as shown in FIG. 7A and FIG. 7B, the ic wafer mounting portion is formed on the generation sheet formed by the hollow core coil 12, and the surface formed by the hollow core coil portion 12 is formed. In the region of the 1C wafer mounting portion, even in the field δ where the region is difficult to ensure, the region where the wafer mounting portion is formed can be sufficiently ensured. Further, in the antenna module, it is not necessary to form the 1C wafer mounting portion in the innermost peripheral region of the air-core coil portion 12, and the IC chip # mounting portion can be formed at any position according to the shape of the air-core coil portion 12. 22 200809640

Further, in the above embodiment, the case of depositing the ferrite sintered body 21 of the same size is described. However, if the above conditions are satisfied, the ferric acid of a different size may be laid. The salt sintered body 21 is such that a small ferrate sintered body 21 is used in the peripheral portion of the hollow core coil portion 12, and on the other hand, a large ferrate sintered body 21 is laid at least in other portions due to impact resistance. Further, in the above embodiment, the antenna module used as the 1C card and the 1C tag has been described, but the present invention is not limited to the shape of the 1C card® and the 1C tag, and can be applied to various other shapes depending on the application. . In view of the above, the present invention has been disclosed in a preferred embodiment, and is not intended to limit the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims. 23 200809640

Erda No.: TW3751PA [Simple Description of the Drawing] Fig. 1A is a plan view showing the antenna module of the embodiment of the present invention as seen from the side of the antenna substrate. FIG. 1B is a side view showing the antenna module shown in the embodiment of the present invention. Fig. 2 is a schematic view showing the bottom surface of the antenna module of the embodiment of the present invention as seen from the side of the core member. Fig. 3A is a plan view showing the meaning of the use of the ® language for the shape of the ferrite sintered body, and the main surface is a square ferrite sintered body. Fig. 3B is a plan view showing the meaning of the term used in the shape of the ferrite sintered body, and the main surface is a rectangular ferrite sintered body. Fig. 3C is a plan view showing the meaning of the term used for the shape of the ferrite sintered body, and the main surface is a polygonal ferrite sintered body. 4 is a side view showing the antenna module shown in the embodiment of the present invention, and is an explanatory view for explaining a structure in which a shielding plate is provided on the antenna module shown in FIGS. 1A and 1B. Fig. 5 is an explanatory view showing a state in which the antenna module shown in Fig. 4 is mounted in a communication device. Fig. 6 is an explanatory view of the drop test type. Fig. 7A is a plan view of the antenna module shown in the present embodiment as seen from the side of the antenna substrate, and is a plan view of an antenna module different from the structure shown in Fig. 1A. Fig. 7B is a side view of the antenna module shown in the embodiment of the present invention, and is a side view of the antenna module different from the structure shown in Fig. 1B. 24 200809640

Erda number: TW3751PA Fig. 8 is a side view showing the antenna module shown in the embodiment of the present invention, and is a description for explaining the structure of providing the shielding plate on the antenna core group of the brothers 7A and 7B. Figure. [Description of main component symbols] 10, 10': Antenna substrate 11: Base film 11a: Connection portion® 12: Air core coil portion 13a, 13a: Signal line 15: 1C Wafer 20: Magnetic core member 21: Perovskite sintering Body 30: shielding plate 40: mounting portion 0 41: metal object 50: antenna module 60: portable telephone 70: jig 25

Claims (1)

200809640 二® 缅375.TW3751PA X. Patent application scope: 1. A magnetic sheet characterized in that: a plurality of flat ferrite sintered bodies are formed, and when the thickness of the ferrite sintered bodies is D [ ^m], the area of the main surface is A[mm2], the length of the long axis is L1, and the length of the short axis is "When the following conditions are met: 2 &lt; D/A, true 0 &lt; L1 &lt; 5χ2Ι/2 And the magnetic sheet according to the first aspect of the invention, wherein one side of the main surface of the ferrite-sintered iron is less than 5 mm and the thickness is 50 or more. / / m and less than 550 / zm. 3. The magnetic sheet of claim 1, wherein the ferrite-sintered iron is formed by using a low dielectric having a dielectric constant of less than 500. The bonding agents are bonded to each other. 4. The magnetic sheet of the first item of the patent application, wherein the ferrite-sintered iron is filled and laid to form no gap in the same plane. _ 5· The magnetic sheet of claim 1, wherein the ferrite-sintered iron is in the repeated state of the magnetic sheet Stacking a plurality of layers of the laminated body. 6. The magnetic sheet of claim 1, wherein the ferrite-sintered iron is differentially stacked so as not to create a gap. The magnetic sheet according to the item 1, wherein a bonding agent mixed with a predetermined magnetic powder is added between the gaps of the ferrite sintered bodies laid in the same plane. 26 200809640 — mmWu : TW3751PA 8 Having 'an antenna coil, the antenna coil includes: an antenna substrate enclosing the antenna coil; and two magnetic sheets, for laying a plurality of flat ferrite sintered bodies to form a sub-covering the antenna coil, Wherein the antenna substrate and the magnetic sheet are disposed in a state in which the main faces of each other are joined to each other, and when the thickness of the ferrite body is D[#m], the area of the main surface is A[mm2], which is long. When the length of the shaft is U and the length of the short axis is L2, the following conditions are satisfied: 2 &lt; D / A, and 〇 &lt; L1 &lt; 5 χ 2 1/2, and ] • S L1/L2 $ 2. 9 An antenna device according to Item 8 of the patent, wherein the magnetic piece is configured to The antenna device of the eighth aspect of the invention, wherein the other main surface of the main surface of the magnetic sheet bonded to the antenna substrate is The antenna device of claim 8, wherein the antenna device is electrically connected to an external ic chip. 12. The antenna device according to claim 8 An Ic wafer mounting surface is formed on the 1C substrate, and the antenna coil is electrically connected to a 1C wafer mounted on the 1C 33⁄4 chip mounting surface. The manufacturing method of the antenna antenna is provided with an antenna coil. The manufacturing method includes: mounting the antenna coil on the antenna substrate, and laying a plurality of flats. 27 200809640 Sanda number: TW3751PA plate-shaped iron An acid salt sintered body covering the antenna coil; stacking the ferrite sintered bodies in a thickness direction by a predetermined bonding agent; and bonding the predetermined metal to the stacked ferrite sintered bodies The shielding plate, wherein when the thickness of the ferrite sintered body is DUm], the area of the main surface is A [mm2], the length of the major axis is L1, and the length of the minor axis is L2, the following conditions are satisfied: 2 &lt;D/A, and 0 &lt; L1 &lt; 5χ21/2, and 1 ^ L1/L2 ^ 2 〇28