JP2021083040A - Transmission line - Google Patents

Abstract

To provide a transmission line that has a structure that can save space by reducing crosstalk with a shield and making it thinner with a stepped branch structure in an electronic device with a built-in antenna structure, a battery, and a control circuit.SOLUTION: A main body 21 of a transmission line 20 includes a first transmission unit 81 having a first end 61 of a first height, a first step 71 formed by bending, and a first line 32a, a second transmission unit 82 having a second end 62 arranged at a first interval K1 with the first end 61 and having the same height as the first end 61, a second step 72 formed by bending, and a second line 32b, and a third transmission unit 83 having a third end 63 at the same height as the first end 61 and a third step 73 formed by bending, and having an integrated structure in which the first line 32a and the second line 32b are arranged in parallel from the connecting end 64 to the third end 63 at the second height H2.SELECTED DRAWING: Figure 1

Description

The present invention relates to a transmission line used in an electronic device.

In recent years, the development of high-density mounting technology in electronic devices has been remarkable, and the demand for thin transmission lines using copper-clad laminates (CCL) and the like has been increasing more and more.

Conventionally, a flexible substrate (transmission line) for connecting a circuit board and a circuit board by passing over a battery has been proposed (Patent Document 1: Japanese Patent No. 5943168). Further, there has been proposed a thin transmission line in which crosstalk is reduced by shielding the copper-clad laminates arranged opposite to each other over the entire circumference (Patent Document 2: Patent No. 6507302). ..

Japanese Patent No. 5943168 Japanese Patent No. 6507302

With the widespread use of personal digital assistants and IoT devices, electronic devices for information communication are required to have a thin structure that can save space. As an example, a personal digital assistant has an antenna structure, a control circuit, and a battery built-in, and the antenna structure and the control circuit are connected by a transmission line having excellent high-frequency transmission characteristics. Such a transmission line is generally arranged so as to bypass the battery while maintaining the shielding performance of suppressing external noise due to the arrangement configuration in the housing. In recent years, the housing has become smaller and thinner, and the battery capacity has increased so that it can be used for a long time in response to high-speed processing of large-capacity data such as next-generation high-speed communication and video, and the occupancy rate in the battery housing has increased. There is a tendency. Further, in the case of a configuration in which a plurality of antennas are arranged so that more stable high-speed communication can be performed, according to the prior art, a transmission line is wired for each of the plurality of antennas. Has a problem that the wiring space in the housing is insufficient.

The present invention has been made in view of the above circumstances, and in an electronic device having a built-in antenna structure, a battery, and a control circuit, crosstalk is reduced by a shield, and a stepped branch structure is used to make the electronic device thinner. It is an object of the present invention to provide a transmission line having a structure capable of realizing a space.

As an embodiment, the problem is solved by a solution means as disclosed below.

In the transmission line of the present invention, the first conductor composed of the transmission line conductor and the ground conductor is formed on the first main surface of the first base material made of thermoplastic resin, and at least the transmission line conductor of the first conductors is formed. A base formed of a plurality of conductors at a predetermined pitch, a coverlay made of a thermoplastic resin covering each of the transmission line conductors, and a second conductor formed on a second main surface of a second base material made of a thermoplastic resin. It has one shield and a second shield whose third conductor is formed on a third base material made of a thermoplastic resin, and the coverlay is adhered to the first main surface of the first base material. The second conductor surface of the first shield is adhered to the surface of the first base material opposite to the first main surface, and the coverlay is attached to the surface of the coverlay opposite to the surface of the first base material. The third conductor surface of the second shield is adhered, the third conductor surface is joined to the second conductor surface, and the second conductor and the third conductor surround the transmission line conductor, respectively. The main body has a thin structure and is used for an electronic device having a built-in battery, and the main body is bent according to the first end of the first height and the thickness of the battery. A first transmission unit having a formed first step and a first line of the transmission line conductors, and a second unit arranged at a first interval from the first end and at the same height as the first end. A second transmission unit having a second step formed by bending corresponding to the end and the thickness of the battery and the second line of the transmission line conductor, and a third end having the same height as the first end. An integral body having a third step formed by bending according to the thickness of the battery, and the first line and the second line are arranged in parallel from a connecting end at a second height to the third end. It is characterized by having a third transmission unit having a structure.

According to this configuration, the first connector arranged at the first end is connected to the first antenna structure, the second connector arranged at the second end is connected to the second antenna structure, and the first transmission unit is connected. , The second transmission unit and the third transmission unit pass over the battery, and the third connector arranged at the third end is connected to the control circuit, so that one transmission line controls each of the plurality of antenna structures. A shield can be used to connect the signal to the circuit while reducing crosstalk, resulting in a thin structure that saves space.

According to the transmission line of the present invention, in an electronic device having an antenna structure, a battery, and a control circuit built-in, it is possible to realize a transmission line having a thin structure corresponding to space saving while reducing crosstalk by a shield. In addition, by adopting this transmission line, it is possible to realize a compact and thin electronic device that supports next-generation high-speed communication and high-speed processing of large-capacity data.

FIG. 1 is a schematic perspective view showing an example of a transmission line according to an embodiment of the present invention. FIG. 2 is a sectional view taken along line II-II of the transmission line of FIG. FIG. 3 is a sectional view taken along line III-III of the transmission line of FIG. 4A is a side view of the transmission line of FIG. 1, and FIG. 4B is a plan view of the transmission line of FIG. FIG. 5 is a schematic structural diagram showing an example of an electronic device to which the transmission line of FIG. 1 is applied. FIG. 6A is a schematic cross-sectional view showing the base according to the present embodiment, and FIG. 6B is a schematic cross-sectional view showing the first intermediate body in which the coverlay according to the present embodiment is thermocompression bonded to the base. Is a schematic cross-sectional view showing a second intermediate body in which a through hole is formed according to the present embodiment. FIG. 7 is a configuration diagram schematically showing an example of the arrangement configuration of the transmission line manufacturing apparatus of the present embodiment. FIG. 8 is a flowchart showing an example of the manufacturing procedure of the transmission line of the present embodiment. FIG. 9A is a diagram schematically showing a first thermocompression bonding machine according to the present embodiment, FIG. 9B is a diagram schematically showing an unnecessary region removing machine according to the present embodiment, and FIG. 9C is a diagram schematically showing the present embodiment. It is a figure which shows typically the 2nd thermocompression bonding machine. FIG. 10A is a diagram schematically showing an ultrasonic bonding machine according to the present embodiment, FIG. 10B is a diagram schematically showing a laser processing machine according to the present embodiment, and FIG. 10C is a diagram schematically showing an inspection according to the present embodiment. It is a figure which shows the machine schematically. FIG. 11 is a diagram schematically showing a folding machine according to the present embodiment. FIG. 12 is a schematic perspective view showing another example of the transmission line of the present embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic perspective view of an example of the transmission line 20 of the present embodiment, FIG. 2 is a sectional view taken along line II-II of the transmission line 20, and FIG. 3 is a sectional view taken along line III-III of the transmission line 20. 4A is a side view of the transmission line 20 of FIG. 1, and FIG. 4B is a plan view of the transmission line 20. FIG. 5 is a schematic structural diagram showing an example of the electronic device 200 to which the transmission line 20 is applied. The transmission line 20 of this embodiment is applied to an electronic device 200 in which an antenna structure, a battery, and a circuit board are built. In all the drawings for explaining the embodiment, members having the same function may be designated by the same reference numerals, and the repeated description thereof may be omitted.

As shown in FIGS. 1 to 5, the transmission line 20 has a main body 21 made of a flexible multilayer wiring board, and a first connector C1 connected to the first circuit is mounted on the first end 61, and the second end is described. A second connector C2 connected to the second circuit is mounted on the third end, and a third connector C3 connected to the third circuit is mounted on the third end. In the example of FIG. 5, the first circuit is the first antenna structure E1, the second circuit is the second antenna structure E2, and the third circuit is the control circuit E3. The transmission line 20 straddles the battery E4 and connects each of the first antenna structure E1 and the second antenna structure E2 and the control circuit E3 with a shield while reducing crosstalk.

As an example, the transmission line 20 is a first main body in a first base material 34 in which a first conductor 31 including a transmission line conductor 32 including a first line 32a and a second line 32b and a ground conductor 33 is made of a thermoplastic resin. A base 30 formed on a surface and at least a plurality of transmission line conductors 32 formed at a predetermined pitch among the first conductors 31, a coverlay 35 made of a thermoplastic resin covering each transmission line conductor 32, and a second conductor 41. A first shield 40 formed on a second main surface of a second base material 42 made of a thermoplastic resin, and a second shield 45 formed on a third base material 47 made of a thermoplastic resin with a third conductor 46. Have. Then, the coverlay 35 is adhered to the first main surface of the first base material 34, and the second conductor surface of the first shield 40 is adhered to the surface opposite to the first main surface of the first base material 34. The third conductor surface of the second shield 45 is adhered to the surface of the coverlay 35 opposite to the adhesive surface of the first base material 34, and the third conductor surface is joined to the second conductor surface. A configuration used in an electronic device 200 having a thin main body 21 in which a second conductor 41 and a third conductor 46 are arranged so as to surround a transmission line conductor 32, respectively, and a battery E4 is built in. Is.

As shown in FIGS. 1 and 4A, the main body 21 includes a first step 71 and a first line 32a that are bent and formed in a one-to-one correspondence with the thickness of the first end 61 of the first height H1 and the battery E4. The first transmission unit 81 is arranged with the first end 61 and the first interval K1 in the lateral direction, and is bent in a one-to-one correspondence with the thickness of the second end 62 of the first height H1 and the battery E4. A third transmission unit 82 having a second step 72 formed and a second line 32b, a third end 63 having a first height H1, and a third bent so as to correspond to the thickness of the battery E4 on a one-to-one basis. A configuration having a step 73 and an integrated third transmission unit 83 in which the first line 32a and the second line 32b are arranged in parallel from the connecting end 64 to the third end 63 of the second height H2. Is. According to this configuration, signals can be connected while reducing crosstalk by the shield, and a thin structure corresponding to space saving can be obtained. Here, the dimensional difference ΔH between the second height H2 and the first height H1 shown in FIG. 4A is the same as the thickness of the battery E4, and the dimensional difference ΔH is within plus or minus 20 [%] of the thickness of the battery E4. At this time, the dimensional difference ΔH is considered to be the same as the thickness of the battery E4.

As shown in FIGS. 1 to 3 and 4B, in the first transmission unit 81, the second transmission unit 82, and the third transmission unit 83, the coverlay 35 is thermocompression bonded to the transmission line conductor 32 and the transmission line conductor 32. A first region Q1 in which an uneven surface is formed due to the formation of a through hole U1 between them, and a second region in which a surface flatter than the first region Q1 is formed due to the absence of the through hole U1. It has Q2, and a connecting end 64 is arranged in the second region Q2. The first region Q1 and the second region Q2 are formed alternately. According to the present embodiment, the strength of the connecting end 64 in which stress is easily concentrated can be increased by providing the connecting end 64 in the second region Q2 having a higher strength than the first region Q1. Therefore, the transmission line conductor 32 It is possible to prevent problems such as cracks caused by distortion and twisting.

In the main body 21, window portions V1 in which a part of the surface of the third conductor 46 on the opposite side of the cover lay 35 is exposed so as to be externally connectable are formed at predetermined intervals, and the window portions V1 are arranged in the first region Q1. ing. According to the present embodiment, the configuration in which the window portion V1 is provided in the first region Q1 on which the uneven surface is formed facilitates external connection and enhances the shielding effect.

The first transmission unit 81 has a section 91 bent and formed in a direction of narrowing the first interval K1 at the second height H2, and the second transmission unit 82 narrows the first interval K1 at the second height H2. It has a second section 92 bent in the direction, and the first section 91 and the second section 92 are arranged in the second region Q2. According to the present embodiment, the second region Q2, which has higher strength than the first region Q1, is provided with the first section 91 and the second section 92, so that the stress is easily concentrated in the second section 91 and the second section 92. Since the strength of the transmission line conductor 32 can be increased, problems such as cracks due to distortion and twist of the transmission line conductor 32 can be prevented.

As shown in FIGS. 1 and 4B, the area including the connecting end 64 in the main body 21 has a Y-shape or a V-shape in a plan view. With this configuration, it is possible to perform signal transmission with a high S / N ratio while suppressing attenuation of high-frequency signals as much as possible. As shown in FIG. 12, the transmission line 20 may omit the first section 91 and the second section 92, and may shorten the third transmission section 83 as much as possible. In addition to the above, the area including the connecting end 64 in the main body 21 may be U-shaped in a plan view. The total length of the transmission line 20 is appropriately set according to the size or shape of the battery E4. The material, size, and shape of the transmission line conductor 32 constituting the transmission line 20 are appropriately set according to the antenna characteristics such as the frequency band used and the matching impedance of the first antenna structure E1 and the second antenna structure E2. To. The material, size, and shape of the thermoplastic resin constituting the transmission line 20 are also appropriately set according to the antenna characteristics such as the frequency band used by the first antenna structure E1 and the second antenna structure E2.

FIG. 7 is a configuration diagram schematically showing an example of the transmission line manufacturing apparatus 1 of the present embodiment, in which the left side in the figure is the upstream side and the right side in the figure is the downstream side. The transmission line manufacturing apparatus 1 includes a first thermocompression bonding machine 2, an unnecessary region removing machine 3, a second thermocompression bonding machine 4, a first bonding machine 5, a second bonding machine 6, and a laser processing machine 7, in order from the upstream side. An inspection machine 8a, a split take-out machine 9, a bending machine 10, an inspection machine 8b, and a transfer machine 17 are arranged, and a controller 19 for controlling these is provided.

A base feeder 11 and a tension adjuster 15 and a coverlay feeder 12 and a tension adjuster 15 are arranged on the upstream side of the first thermocompression bonding machine 2, respectively. A first shield feeder 13 and a tension adjuster 15, and a second shield feeder 14 and a tension adjuster 15 are arranged on the upstream side of the second thermocompression bonding machine 4. Here, the tension adjuster 15 has a tension roller as an example, and depending on the position of the tension roller, a sheet-shaped work (base 30, coverlay 35, first intermediate 51, first shield 40, second shield 45). The tension of is kept within a certain range. A pitch feeder 16 is arranged on the upstream side of the second thermocompression bonding machine 4, and a pitch feeder 16 is arranged on the upstream side of the inspection machine 8. The pitch feeder 16 has a feed roller as an example, and keeps the feed pitch of sheet-shaped workpieces such as the first intermediate 51 and the sixth intermediate 56 at a constant value depending on the feed amount of the feed roller.

FIG. 9A is a diagram schematically showing the first thermocompression bonding machine 2. As an example, the first thermocompression bonding machine 2 has a press plate having a built-in heater, and the base 30 and the coverlay 35 are sandwiched from above and below by the two press plates arranged to face each other, and the base 30 and the coverlay 35 are pressed and heated. 1 It is a configuration that forms an intermediate 51. FIG. 9B is a diagram schematically showing the unnecessary area removing machine 3. As an example, the unnecessary area removing machine 3 has a punching blade and a pedestal for receiving the punching blade, and the unnecessary area R1 is removed by punching the unnecessary area R1 of the first intermediate 51 with the punching blade to remove the unnecessary area R1. The through hole U1 penetrating the 51 is formed, and the second intermediate 52 is formed. As a configuration other than the above, the unnecessary region removing machine 3 can be applied with a laser processing machine that removes the unnecessary region R1 by laser irradiation. FIG. 9C is a diagram schematically showing the second thermocompression bonding machine 4. The second thermocompression bonding machine 4 has a press plate having a built-in heater as an example, and pressurizes the first shield 40 and the second intermediate 52 by sandwiching the first shield 40 and the second intermediate 52 from above and below by the two press plates arranged so as to face each other. It is configured to be heated, and at the same time, the first shield 40 is thermocompression bonded to the base 30, and at the same time, the second shield 45 is thermocompression bonded to the coverlay 35. Here, the first thermocompression bonding machine 2 and the second thermocompression bonding machine 4 can have the same device configuration. This facilitates maintenance of the device.

FIG. 10A is a diagram schematically showing a first bonding machine 5 (first ultrasonic bonding machine) or a second bonding machine 6 (second ultrasonic bonding machine). As an example, the first joining machine 5 includes a main body portion having a built-in vibrating body, a head portion (horn) attached to the main body portion and ultrasonically vibrating by vibration transmitted from the vibrating body, and a receiving portion receiving the head portion. Has. In the first bonding machine 5 (first ultrasonic bonding machine), the first shield 40 is thermocompression bonded to the base 30 and the second shield 45 is bonded to the coverlay 35 by the head portion and the receiving portion arranged to face each other. The work in a thermocompression-bonded state is sandwiched from above and below, and the head portion is ultrasonically vibrated to form a fourth intermediate body 54 by ultrasonic bonding. Alternatively, the first bonding machine 5 (first ultrasonic bonding machine) has a second shield on a third intermediate 53 in which the first shield 40 is thermocompression bonded to the base 30 by the head portion and the receiving portion arranged to face each other. The work is sandwiched from above and below in a state where the 45s are overlapped, and the head portion is ultrasonically vibrated to form a fourth intermediate 54 by ultrasonic bonding. Here, the fourth intermediate 54 refers to a semi-finished product in the pre-stage that becomes the transmission line 20, and is in a state of being shielded over the entire circumference.

As an example, the second bonding machine 6 (second ultrasonic bonding machine) includes a main body portion having a built-in vibrating body and a head portion (horn) attached to the main body portion and ultrasonically vibrates by vibration transmitted from the vibrating body. It has a receiving portion that receives the head portion, and the fourth intermediate body 54 is sandwiched and sandwiched from above and below by the head portion and the receiving portion that are arranged so as to face each other, and the head portion is ultrasonically vibrated for ultrasonic bonding. The fifth intermediate 55 is formed by the above. Here, the first joining machine 5 and the second joining machine 6 can have the same device configuration. This facilitates maintenance of the device. Alternatively, the head portions that vibrate ultrasonic waves may be arranged so as to face each other so as to have the functions of both the first joining machine 5 and the second joining machine 6.

FIG. 10B is a diagram schematically showing the laser processing machine 7. The laser processing machine 7 has a configuration in which a predetermined region is removed by laser irradiation to partially expose the third conductor 46 to form the sixth intermediate 56. FIG. 10C is a diagram schematically showing the inspection machine 8a or the inspection machine 8b. As an example, the inspection machine 8a (inspection machine 8b) brings contact pins protruding downward at predetermined intervals into contact with the transmission line conductor 32 to energize the transmission line conductor 32 so that the transmission line conductor 32 is in the normal range. It is a configuration that inspects whether or not it is inside. As a configuration other than the above, as an example, the inspection machine 8a (inspection machine 8b) captures an image of the transmission line conductor 32 with a camera and analyzes the image to check whether the transmission line conductor 32 is broken or not, and the continuity level is in the normal range. It may be configured to inspect whether or not it is inside, or the inspection machine 8a (inspection machine 8b), for example, conducts an electrical characteristic inspection for energizing the transmission line conductor 32 and images the transmission line conductor 32. In some cases, both the appearance characteristic inspection for image analysis and the appearance characteristic inspection are performed. In addition, either one of the inspection machine 8a and the inspection machine 8b may be omitted.

On the downstream side of the inspection machine 8a, a split take-out machine 9 for taking out the 7th intermediate 57, which is a main part of the transmission line 20 from the 6th intermediate 56, is arranged. As an example, the split take-out machine 9 has a punching blade and a pedestal for receiving the punching blade, and the seventh intermediate 57 is punched along a predetermined cut line by punching the sixth intermediate 56 in-line-inspected by the punching blade. It is a configuration that separates. As a configuration other than the above, the split take-out machine 9 may make the seventh intermediate 57 separable by laser machining the sixth intermediate 56 along a predetermined cut line.

FIG. 11 is a diagram schematically showing the bending machine 10. As an example, the folding machine 10 sandwiches the seventh intermediate 57 up and down by the upper die 10a and the lower die 10b heated to a heating temperature of 150 [° C.] to 230 [° C.], and holds the upper die 10a in the arrow direction Fa. By moving the lower mold 10b in the direction of the arrow Fb as well as moving the 7th intermediate body 57 to form a bent portion. That is, the first step 71, the second step 72, and the third step 73 are formed. When the bent portion is formed in the seventh intermediate 57, springback occurs due to the restoring force of the thermoplastic resin, so that the bending angle of the upper die 10a and the lower die 10b is in the range of more than 90 [degrees] and 95 [degrees] or less. By setting the shape so that it is inside, the bending angle can be within 90 [degrees] plus or minus 5 [degrees]. Further, by forming the upper die 10a and the lower die 10b into a shape in which the upper die 10a and the lower die 10b protrude from the bent portion on the first height H1 side, the bent portion is formed in a state where the seventh intermediate 57 is difficult to be displaced, and the bent portion is not scratched. The eighth intermediate 58 having the bent portion formed as described above can be formed. Here, the heating temperature is set to a temperature at which the thermoplastic resin can be thermally deformed and the thermoplastic resin does not melt. In consideration of heat transfer loss, as an example, the heating temperature is set to a temperature 2 [° C.] to 10 [° C.] higher than the thermal deformation temperature of the thermoplastic resin.

In addition to the above, the formation time of the bent portion can be shortened by sandwiching the seventh intermediate 57 with a flat mold for preheating on the upstream side of the upper mold 10a and the lower mold 10b. Further, in addition to the above, the formation time of the bent portion can be shortened by sandwiching the eighth intermediate 58 with a cooling die on the downstream side of the upper die 10a and the lower die 10b. As an example, the cooling mold has the same mold as the upper mold 10a and the lower mold 10b without a heater.

A tray 18 for accommodating the transmission line 20 is arranged on the downstream side of the folding machine 10. The transmission line 20 manufactured on the above-mentioned consistent production line and in-line-inspected is conveyed by the transfer machine 17 in a vacuum-adsorbed state and stored in the tray 18.

According to this embodiment, a thin transmission line 20 that is shielded over the entire circumference to reduce crosstalk can be consistently manufactured on one production line. Then, since the transmission line 20 is manufactured by thermocompression bonding or ultrasonic bonding without using an adhesive or a conductive paste, the production time (tact time) should be shorter than the heat curing time of the conductive paste or the adhesive. And the required components are minimized. In addition, a thin transmission line 20 can be consistently manufactured on one production line with a stepped branch structure that connects the antenna structures arranged at a plurality of positions and the control circuit through the battery.

As described above, the second thermocompression bonding machine 4 has a configuration in which the first shield 40 is thermocompression bonded to the base 30 and the second shield 45 is thermocompression bonded. According to this configuration, since the first shield 40 and the second shield 45 are thermocompression-bonded at the same time, it is possible to prevent wrinkles from being formed on the first shield 40 and the second shield 45 during thermocompression bonding. The above-mentioned manufacturing apparatus is an example. As an example, the above-mentioned technique of Patent Document 2 can be applied to the equipment on the upstream side of the inspection machine 8a.

Subsequently, a method for manufacturing the transmission line 20 according to the present invention will be described below.

FIG. 8 is a flowchart showing a manufacturing procedure of the transmission line 20. As an example, the transmission line 20 has a first thermocompression bonding step S1, an unnecessary region removing step S2, a second thermocompression bonding step S3, a first bonding step S4, a second bonding step S5, a laser machining step S6, a dividing step S7, and a bending step. It is manufactured in the order of S8 and inspection step S9.

The above manufacturing procedure is an example. In the manufacturing procedure of the transmission line 20, as a configuration other than the above, the first joining step S4 and the second joining step S5 can be performed at the same time, and the second joining step S5 can be omitted. Further, an inspection step S9 may be inserted between the laser machining step S6 and the bending step S8.

The base 30 is made of a copper-clad laminate (CCL), and transmission line conductors 32 are formed on the first main surface 34a of the sheet-shaped first base material 34 at a predetermined pitch in the longitudinal direction. The first conductor 31 is close to the linearly formed transmission line conductor 32 and the input end and the output end of the transmission line conductor 32, respectively, and the side close to the input end and the output end is "U-shaped" or "U-shaped" or " It is composed of a ground conductor 33 formed in a "U-shape". As an example, the first connector C1, the second connector C2, and the third connector C3 are mounted on the input end and the output end of the ground conductor 33 and the transmission line conductor 32 via solder or conductive paste. As a configuration other than the above, the first conductor 31 is close to the input end and the output end of the transmission line conductor 32 on a one-to-one basis, and a plurality of ground conductors formed in a "U-shape" or a "U-shape" are formed. It may consist of 33. In the base 30, a plurality of transmission line conductors 32 are arranged on a sheet-shaped first base material 34 at a predetermined pitch in the longitudinal direction, and there is an unnecessary region between the transmission line conductor 32 and the transmission line conductor 32.

As an example, the first conductor 31 is made of copper foil. As an example, the first base material 34 is made of a thermoplastic resin. As an example, the first base material 34 is made of a liquid crystal polymer (LCP), a polyimide (PI), a polyamide (PA), or a polyetheretherketone (PEEK), a fluororesin, or other known thermoplastic resin. As an example, the sheet-shaped base 30 is attached to the base feeder 11 in a reel state and is supplied so that it can be continuously processed.

As an example, the first conductor 31 is a copper foil having a thickness of 5 [μm] or more and 25 [μm] or less. As an example, the first base material 34 is a liquid crystal polymer (LCP) having a thickness of 50 [μm] or more and 150 [μm] or less. As an example, the first conductor 31 is formed by pattern etching a copper-clad laminate (CCL).

As an example, the base 30 is subjected to oxygen-containing plasma by irradiating the surface (first main surface 34a) on the side where the first conductor 31 is bonded by a plasma irradiation device as a pretreatment for the first thermocompression bonding step S1 to obtain an organic substance. Is removed and reformed. By irradiating oxygen-containing plasma, the degree of adhesion is improved during the first thermocompression bonding. In addition to the above, a plasma irradiation device may be arranged on the upstream side of the first thermocompression bonding machine 2 to irradiate the first main surface 34a with oxygen-containing plasma (not shown).

The coverlay 35 is made of a thermoplastic resin as an example. As an example, the coverlay 35 is made of a liquid crystal polymer (LCP), a polyimide (PI), a polyamide (PA), or a polyetheretherketone (PEEK), a fluororesin, or other known thermoplastic resin. As an example, the coverlay 35 is attached to the coverlay feeder 12 in a reel state and is supplied so that it can be continuously processed.

As an example, the coverlay 35 is a liquid crystal polymer (LCP) having a thickness of 25 [μm] or more and 125 [μm] or less.

The first shield 40 is made of a copper-clad laminate (CCL) as an example, and the second conductor 41 is formed on the second main surface 42a of the sheet-shaped second base material 42. The second conductor 41 may be bonded to the entire surface of the second base material 42, or may be bonded in a mesh shape.

The second conductor 41 is made of copper foil as an example. As an example, the second base material 42 is made of a thermoplastic resin. As an example, the second base material 42 is made of a liquid crystal polymer (LCP), a polyimide (PI), a polyamide (PA), or a polyetheretherketone (PEEK), a fluororesin, or other known thermoplastic resin. As an example, the first shield 40 is attached to the first shield feeder 13 in a reel state and is supplied so that it can be continuously processed.

As an example, the second conductor 41 is a copper foil having a thickness of 5 [μm] or more and 25 [μm] or less. As an example, the second base material 42 is a polyimide (PI) having a thickness of 5 [μm] or more and 25 [μm] or less. As an example, the first shield 40 is used with the copper-clad laminate (CCL) as it is.

As an example, the first shield 40 irradiates the surface (second main surface 42a) on the side where the second conductor 41 is bonded with oxygen-containing plasma by a plasma irradiation device as a pretreatment of the second thermocompression bonding step S3. To remove organic substances and modify them. By irradiating oxygen-containing plasma, the degree of adhesion is improved during the second thermocompression bonding. In addition to the above, a plasma irradiation device may be arranged on the upstream side of the second thermocompression bonding machine 4 to irradiate the second main surface 42a with oxygen-containing plasma (not shown).

As an example, the second shield 45 is made of a copper-clad laminate (CCL), and a third conductor 46 is formed on one side of a sheet-shaped third base material 47. The third conductor 46 may be bonded to the entire surface of the third base material 47, or may be bonded in a mesh shape.

As an example, the third conductor 46 is made of copper foil. The third base material 47 is made of a thermoplastic resin as an example. As an example, the third base material 47 is made of a liquid crystal polymer (LCP), a polyimide (PI), a polyamide (PA), or a polyetheretherketone (PEEK), a fluororesin, or other known thermoplastic resin. As an example, the second shield 45 is attached to the second shield feeder 14 in a reel state and is supplied so that it can be continuously processed.

As an example, the third conductor 46 is a copper foil having a thickness of 5 [μm] or more and 25 [μm] or less. As an example, the third base material 47 is a polyimide (PI) having a thickness of 5 [μm] or more and 25 [μm] or less. As an example, the second shield 45 is used with the copper-clad laminate (CCL) as it is. As an example, the second shield 45 has the same material composition as the first shield 40.

As an example, the second shield 45 irradiates the surface on the side to which the third conductor 46 is bonded with oxygen-containing plasma by a plasma irradiation device as a pretreatment of the first joining step S4 to remove organic substances and remove organic substances. Reform. By irradiating the oxygen-containing plasma, the degree of adhesion in the first joining step S4 is improved. In addition to the above, a plasma irradiation device may be arranged on the upstream side of the first joining machine 5 to irradiate the surface on the side to which the third conductor 46 is bonded with oxygen-containing plasma (not shown).

In the first thermocompression bonding step S1, the coverlay 35 is thermocompression bonded to the first main surface 34a of the first base material 34. As an example, using the first base material 34 and the coverlay 35 as the same material, the heating temperature is equal to or lower than the melting point of the first base material 34 and the coverlay 35, and the deflection temperature under load or the deflection temperature under load is plus or minus 50. At a heating temperature within [° C.], heat distortion is performed while pressurizing at a predetermined pressure for a predetermined time to obtain the first intermediate 51.

As an example, the first thermocompression bonding step S1 has a heating temperature of 180 [° C.] or higher and 280 [° C.] or lower, a pressing force of 10 [MPa] or higher and 60 [MPa] or lower, and 240 [seconds] or higher. Thermocompression bonding is performed for the following heating and pressurizing times. Thermocompression bonding is performed in the air as an example.

In the unnecessary region removing step S2, the first intermediate 51 is removed by punching out an unnecessary region between the transmission line conductor 32 and the transmission line conductor 32 to form a through hole U1 penetrating the first intermediate 51. Then, it is referred to as the second intermediate 52. As an example, the through hole U1 has a rectangular shape or a rectangular shape with rounded corners, and is formed at predetermined intervals P2 in the longitudinal direction. The predetermined interval P2 is preferably 2.5 [mm] or less. As a result, the effect of reducing crosstalk is enhanced. As an example, the length of the through hole U1 is set to 0.2 times or more and less than 1.0 times the total length of the transmission line conductor 32.

When the total length of the transmission line conductor 32 exceeds 500 [mm], as an example, the predetermined interval is set to 1.5 [mm] or more. This facilitates the joining of the second conductor 41 and the third conductor 46. When the total length of the transmission line conductor 32 is 500 [mm] or less, the predetermined interval is set to less than 0.5 [mm] as an example. As a result, the effect of reducing crosstalk becomes higher. As an example, the predetermined interval P2 is set to 0.0 [mm]. As a result, the effect of reducing crosstalk is maximized.

The second thermocompression bonding step S3 thermocompression-bonds the side of the second main surface 42a of the first shield 40 to the surface of the base 30 opposite to the first main surface 34a with respect to the second intermediate 52, and at the same time. , The second shield 45 is thermocompression bonded to the first main surface 34a of the base 30. As an example, the first base material 34 and the second base material 42 are made of different materials, the second base material 42 and the third base material 47 are made of the same material, and the heating temperature is equal to or lower than the melting point of the first base material 34. In addition, heat distortion is performed by heating while pressurizing at a predetermined pressure for a predetermined time at a heating temperature within plus or minus 50 [° C.] centered on the deflection temperature under load of the first base material 34 or the deflection temperature under load of the first base material 34. To do. Alternatively, in the second thermocompression bonding step S3, the side of the second main surface 42a of the first shield 40 is thermocompression bonded to the surface of the base 30 opposite to the first main surface 34a. As an example, using the first base material 34 and the second base material 42 as different materials, the heating temperature is equal to or lower than the melting point of the first base material 34, and the deflection temperature under load of the first base material 34 or the first base material 34. Heat distortion is performed by heating while pressurizing at a predetermined pressure for a predetermined time at a heating temperature within plus or minus 50 [° C.] centered on the deflection temperature under load.

As an example, the second thermocompression bonding step S3 has a heating temperature of 180 [° C.] or higher and 280 [° C.] or lower, a pressing force of 10 [MPa] or higher and 60 [MPa] or lower, and 240 [seconds] or higher. Thermocompression bonding is performed for the following heating and pressurizing times. Thermocompression bonding is performed in the air as an example.

Following the second thermocompression bonding step S3, the first bonding step S4 ultrasonically bonds the exposed surface of the third conductor 46 to the exposed surface of the second conductor 41. As an example, using the same material as the second conductor 41 and the third conductor 46, the frequency is 15 [kHz] or more and 200 while pressing the horn with a pressing force of 500 [N] or more and 2500 [N] or less. By applying ultrasonic vibration of [kHz] or less, ultrasonic bonding is performed to obtain a fourth intermediate 54.

Following the first joining step S4, the second joining step S5 is performed. In the second bonding step S5, the end of the third conductor 46 is ultrasonically bonded to the end of the ground conductor 33 with respect to the fourth intermediate 54. Here, the ends of the ground conductor 33 are the respective ends on the side of the transmission line conductor 32. Further, the ends of the third conductor 46 are both ends. As an example, using the same material as the second conductor 41 and the third conductor 46, the frequency is 15 [kHz] or more and 200 while pressing the horn with a pressing force of 500 [N] or more and 2500 [N] or less. By applying ultrasonic vibration of [kHz] or less, ultrasonic bonding is performed to obtain a fifth intermediate 55.

Following the second joining step S5, the laser machining step S6 is performed. In the laser machining step S6, the surface of the third conductor 46 opposite to the joint surface with the ground conductor 33 is partially exposed by laser irradiation with respect to the fifth intermediate 55 to form window portions V1 at predetermined intervals. Then, it is referred to as the sixth intermediate 56. As an example, the window portion V1 has a quadrangular shape or a rounded quadrangular shape, and a plurality of window portions V1 are formed at predetermined intervals. Laser irradiation is performed at a predetermined output for a predetermined time. For laser irradiation, known equipment and known construction methods can be applied. The laser machining step S6 may be omitted.

Following the laser machining step S6, the division step S7 is performed. In the split step S7, the sixth intermediate 56 is punched along a predetermined cut line by the punching blade of the split take-out machine 9 to form the seventh intermediate 57. As an example, as the sixth intermediate 56 provided so as to face each other in the width direction of the material, two seventh intermediates 57 may be taken out. As an example, the seventh intermediate 57 may be sequentially taken out as the sixth intermediate 56 provided alternately in the length direction of the material.

Following the division step S7, the bending step S8 is performed. In the bending step S8, the seventh intermediate 57 is sandwiched up and down by the heated upper mold 10a and the lower mold 10b, and the seventh intermediate 57 is squeezed to form a bent portion to form the eighth intermediate 58. As an example, the folding machine 10 holds the 7th intermediate 57 up and down by the upper mold 10a and the lower mold 10b heated to a heating temperature of 150 [° C.] to 230 [° C.], and makes the 7th intermediate 57. The first step 71, the second step 72, and the third step 73 are formed.

Following the bending step S8, the inspection step S9 is performed. In the inspection step S9, as an example, the contact pin of the inspection machine 8 is brought into contact with the transmission line conductor 32 to energize the eighth intermediate 58 so that the transmission line conductor 32 is not broken and the continuity level is determined. Check that it is within the normal range. Then, as described above, the transmission line 20 manufactured on the consistent production line and in-line-inspected is conveyed by the transfer machine 17 in a vacuum-adsorbed state and stored in the tray 18.

According to the present embodiment, by feeding the base 30, the coverlay 35, the first shield 40, and the second shield 45 at a predetermined pitch, the first thermocompression bonding step S1, the unnecessary region removing step S2, and the second thermocompression bonding step Through S3 and the first joining step S4, a thin transmission line 20 that is shielded over the entire circumference to reduce crosstalk can be manufactured on a consistent line. Then, since the second conductor of the first shield 40 and the third conductor of the second shield 45 are ultrasonically bonded without using an adhesive or a conductive paste, the production time (tact time) of the conductive paste or the adhesive is set. It can be shorter than the heat curing time and the required components are minimized. According to this configuration, in a state where the second conductor 41 and the third conductor 46 are ultrasonically bonded, the ground conductor 33 arranged close to the input end and the output end of the transmission line conductor 32 is simultaneously made into the third conductor 46. It can be ultrasonically bonded. Since the first shield 40 and the second shield 45 are an integral structure, it is possible to prevent wrinkles and stress distortion when the ground conductor 33 is ultrasonically bonded to the third conductor 46 at the same time. According to this configuration, since the third conductor 46 is an integral structure with the second shield 45, a part of the third conductor 46 on the opposite side of the joint surface with the ground conductor 33 is lasered. It is possible to easily form the exposed window portions V1 at predetermined intervals. According to this configuration, it is possible to easily manufacture a thin transmission line 20 having a stepped and branched structure connecting the antenna structures arranged at a plurality of positions and the control circuit through the battery.

The transmission line manufacturing apparatus 1 and the transmission line manufacturing method of the above-described embodiment have excellent shielding performance and reduce crosstalk between transmission lines, while having a stepped branch structure for space-saving transmission. The line 20 can be manufactured. Further, by adopting this transmission line 20, it is possible to realize a small and thin electronic device corresponding to next-generation high-speed communication and high-speed processing of large-capacity data.

As described above, the present invention is not limited to the above-described embodiment. In the above example, it is configured to be bent in a series of production lines, but the present invention is not limited to this, and the bending step S8 is set to a separate line, and the bending position and the bending amount are set according to the model of the electronic device and the size of the battery. It may be changed each time. In the above example, the transmission line 20 has a configuration in which the area including the connecting end 64 has a Y-shape or a V-shape in a plan view, but the present invention is not limited to this, and the transmission line 20 has a U-shape or an L-shape. It is also possible to. The transmission line conductor 32 may be appropriately provided with a dummy conductor depending on the wiring configuration of the antenna structure and the control circuit.

1 Transmission line manufacturing equipment 2 1st thermocompression bonding machine 3 Unnecessary area removing machine 4 2nd thermocompression bonding machine 5 Bonding machine (1st ultrasonic bonding machine)
6 Bonding machine (2nd ultrasonic bonding machine)
7 Laser processing machine 8a, 8b Inspection machine 9 Split take-out machine 10 Bending machine 11 Base feeder 12 Coverlay feeder 13 1st shield feeder 14 2nd shield feeder 15 Tension adjuster 16 Pitch feeder 17 Transfer machine 18 Tray 19 Controller 20 Transmission line 21 Main body 30 Base 31 1st conductor 32 Transmission line Conductor, 32a 1st line, 32b 2nd line 33 Ground conductor 34 1st base material 35 Coverlay 40 1st shield 41 2nd conductor 42 2nd Base material 45 Second shield 46 Third conductor 47 Third base material 51 First intermediate 52 Second intermediate 53 Third intermediate 54 Fourth intermediate 55 Fifth intermediate 56 Sixth intermediate 57 Seventh intermediate 58 8th intermediate 61 1st end 62 2nd end 63 3rd end 64 Connecting end 71 1st step 72 2nd step 73 3rd step 81 1st transmission part 82 2nd transmission part 83 3rd transmission part 91 1st Section 92 Section 2 200 Electronic device C1 1st connector C2 2nd connector C3 3rd connector E1 1st circuit (1st antenna structure)
E2 2nd circuit (2nd antenna structure)
E3 3rd circuit (control circuit)
E4 Battery H1 1st height H2 2nd height K1 1st interval Q1 1st area Q2 2nd area U1 Through hole V1 Window

Transmission line of the present invention has a base transmission line conductors on the first major surface of the first base material composed of a thermoplastic resin are plurally formed at a predetermined pitch, a cover lay comprising a thermoplastic resin covering each said transmission line conductors A first shield formed on the second main surface of the second base material whose second conductor is made of a thermoplastic resin, and a second shield formed on a third base material whose third conductor is made of a thermoplastic resin. The coverlay is adhered to the first main surface of the first base material, and the second conductor surface of the first shield is on the surface opposite to the first main surface of the first base material. The third conductor surface of the second shield is bonded to the surface of the coverlay opposite to the surface of the coverlay to be bonded to the first base material, and the third conductor surface is bonded to the second conductor surface. Is joined, and the second conductor and the third conductor are arranged so as to surround the transmission line conductor, respectively, and have a main body having a thin structure, which is used for an electronic device having a built-in battery. Therefore, the main body has a first end having a first height, a first step formed by bending corresponding to the thickness of the battery, and a first transmission portion having a first line of the transmission line conductors. Of the second end, which is arranged at the first interval from the first end and has the same height as the first end, the second step which is bent and formed corresponding to the thickness of the battery, and the transmission line conductor. A second conductor having a second line, a third end having the same height as the first end, a third step bent and formed corresponding to the thickness of the battery, the first conductor, and the second. It is composed of a third transmission unit having a transmission unit, and the third transmission unit has the first line and the second line in parallel from a connecting end at a second height to the third end. It is characterized in that the third transmission unit is arranged and has a structure in which the first transmission unit and the second transmission unit are integrated.

Transmission line 20, as an example, the first major surface of the first substrate 34 where the first conductor composed of a transmission line conductor 32 and the ground conductor includes a first line 32a and the second line 32b is formed of a thermoplastic resin The base 30 is formed and at least a plurality of transmission line conductors 32 are formed at a predetermined pitch among the first conductors, the coverlay 35 made of a thermoplastic resin covering each transmission line conductor 32, and the second conductor 41 are thermoplastic. It has a first shield 40 formed on a second main surface of a second base material 42 made of resin, and a second shield 45 whose third conductor 46 is formed on a third base material 47 made of thermoplastic resin. Then, the coverlay 35 is adhered to the first main surface of the first base material 34, and the second conductor surface of the first shield 40 is adhered to the surface opposite to the first main surface of the first base material 34. The third conductor surface of the second shield 45 is adhered to the surface of the coverlay 35 opposite to the adhesive surface of the first base material 34, and the third conductor surface is joined to the second conductor surface. A configuration used in an electronic device 200 having a thin main body 21 in which a second conductor 41 and a third conductor 46 are arranged so as to surround a transmission line conductor 32, respectively, and a battery E4 is built in. Is.

The base 30 is made of a copper-clad laminate (CCL), and transmission line conductors 32 are formed on the first main surface 34a of the sheet-shaped first base material 34 at a predetermined pitch in the longitudinal direction. The first conductor is close to the linearly formed transmission line conductor 32 and the input end and the output end of the transmission line conductor 32, respectively, and the side close to the input end and the output end is "U-shaped" or "U-shaped" or "U-shaped". It consists of a ground conductor formed in a "character shape". As an example, the first connector C1, the second connector C2, and the third connector C3 are mounted on the input end and the output end of the ground conductor and the transmission line conductor 32 via solder or conductive paste. As a configuration other than the above, the first conductor is one-to-one close to the input end and the output end of the transmission line conductor 32, respectively, and is formed with a plurality of ground conductors formed in a "U-shape" or a "U-shape". May consist of. In the base 30, a plurality of transmission line conductors 32 are arranged on a sheet-shaped first base material 34 at a predetermined pitch in the longitudinal direction, and there is an unnecessary region between the transmission line conductor 32 and the transmission line conductor 32.

As an example, the first conductor is made of copper foil. As an example, the first base material 34 is made of a thermoplastic resin. As an example, the first base material 34 is made of a liquid crystal polymer (LCP), a polyimide (PI), a polyamide (PA), or a polyetheretherketone (PEEK), a fluororesin, or other known thermoplastic resin. As an example, the sheet-shaped base 30 is attached to the base feeder 11 in a reel state and is supplied so that it can be continuously processed.

As an example, the first conductor is a copper foil having a thickness of 5 [μm] or more and 25 [μm] or less. As an example, the first base material 34 is a liquid crystal polymer (LCP) having a thickness of 50 [μm] or more and 150 [μm] or less. As an example, the first conductor is formed by pattern etching a copper-clad laminate (CCL).

As an example, as a pretreatment of the first thermocompression bonding step S1, the base 30 irradiates the surface (first main surface 34a) on the side where the first conductors are bonded with oxygen-containing plasma by a plasma irradiation device to irradiate an organic substance. Remove and modify. By irradiating oxygen-containing plasma, the degree of adhesion is improved during the first thermocompression bonding. In addition to the above, a plasma irradiation device may be arranged on the upstream side of the first thermocompression bonding machine 2 to irradiate the first main surface 34a with oxygen-containing plasma (not shown).

Following the first joining step S4, the second joining step S5 is performed. In the second bonding step S5, the end of the third conductor 46 is ultrasonically bonded to the end of the ground conductor with respect to the fourth intermediate 54. Here, the ends of the ground conductor are the respective ends on the side of the transmission line conductor 32. Further, the ends of the third conductor 46 are both ends. As an example, using the same material as the second conductor 41 and the third conductor 46, the frequency is 15 [kHz] or more and 200 while pressing the horn with a pressing force of 500 [N] or more and 2500 [N] or less. By applying ultrasonic vibration of [kHz] or less, ultrasonic bonding is performed to obtain a fifth intermediate 55.

Following the second joining step S5, the laser machining step S6 is performed. In the laser machining step S6, the surface of the third conductor 46 opposite to the joint surface with the ground conductor is partially exposed to the fifth intermediate 55 by laser irradiation to form window portions V1 at predetermined intervals. , The sixth intermediate 56. As an example, the window portion V1 has a quadrangular shape or a rounded quadrangular shape, and a plurality of window portions V1 are formed at predetermined intervals. Laser irradiation is performed at a predetermined output for a predetermined time. For laser irradiation, known equipment and known construction methods can be applied. The laser machining step S6 may be omitted.

1 Transmission line manufacturing equipment 2 1st thermocompression bonding machine 3 Unnecessary area removing machine 4 2nd thermocompression bonding machine 5 Bonding machine (1st ultrasonic bonding machine)
6 Bonding machine (2nd ultrasonic bonding machine)
7 Laser Machining Machine 8a, 8b Inspection Machine 9 Split Extraction Machine 10 Bending Machine 11 Base Feeder 12 Coverlay Feeder 13 1st Shield Feeder 14 2nd Shield Feeder 15 Tension Adjuster 16 Pitch Feeder 17 Transfer Machine 18 Tray 19 Controller 20 Transmission line 21 Main unit 30 Base
32 Transmission line Conductor, 32a 1st line, 32b 2nd line 34 1st base material 35 Coverlay 40 1st shield 41 2nd conductor 42 2nd base material 45 2nd shield 46 3rd conductor 47 3rd base material 51 1 Intermediate 52 Second intermediate 53 Third intermediate 54 Fourth intermediate 55 Fifth intermediate 56 Sixth intermediate 57 Seventh intermediate 58 Eighth intermediate 61 First end 62 Second end 63 Third end 64 Connecting end 71 First step 72 Second step 73 Third step 81 First transmission section 82 Second transmission section 83 Third transmission section 91 Section 1 92 Section 2 200 Electronic equipment C1 First connector C2 Second connector C3 3rd connector E1 1st circuit (1st antenna structure)
E2 2nd circuit (2nd antenna structure)
E3 3rd circuit (control circuit)
E4 Battery H1 1st height H2 2nd height K1 1st interval Q1 1st area Q2 2nd area U1 Through hole V1 Window

The transmission line of the present invention is a coverlay made of a base in which a plurality of transmission line conductors are formed at a predetermined pitch on a first main surface of a first base material made of a thermoplastic resin, and a thermoplastic resin covering each of the transmission line conductors. A first shield formed on the second main surface of the second base material whose second conductor is made of a thermoplastic resin, and a second shield formed on a third base material whose third conductor is made of a thermoplastic resin. The coverlay is adhered to the first main surface of the first base material, and the second conductor surface of the first shield is on the surface opposite to the first main surface of the first base material. The third conductor surface of the second shield is bonded to the surface of the coverlay opposite to the surface of the coverlay to be bonded to the first base material, and the third conductor surface is bonded to the second conductor surface. Is joined, and the second conductor and the third conductor are arranged so as to surround the transmission line conductor, respectively, and have a main body having a thin structure, which is used for an electronic device having a built-in battery. Therefore, the main body has a first end having a first height, a first step formed by bending corresponding to the thickness of the battery, and a first transmission portion having a first line of the transmission line conductors. Of the second end, which is arranged at the first interval from the first end and has the same height as the first end, the second step which is bent and formed corresponding to the thickness of the battery, and the transmission line conductor. A second conductor having a second line, a third end having the same height as the first end, a third step bent and formed corresponding to the thickness of the battery, the first conductor, and the second. It is composed of a third transmission unit having a transmission unit, and the third transmission unit has the first line and the second line in parallel from a connecting end at a second height to the third end. The third conductor is arranged and has a structure in which the first conductor and the second conductor are integrated, and the first conductor, the second conductor, and the third conductor are integrated. With the first region where the third conductor surface of the second shield is formed unevenly because the coverlay is heat-bonded to form a through hole between the transmission line conductor and the transmission line conductor. The third conductor surface of the second shield has a second region formed flatter than the first region because the through hole is not formed, and the connecting end is provided in the second region. Window portions that are arranged so that a part of the surface of the third conductor on the opposite side of the coverlay is exposed so as to be externally connectable are formed at predetermined intervals, and the window portions are arranged in the first region. The first transmission unit is bent in the direction of narrowing the first interval at the second height. The second transmission section has a second section formed by bending in a direction of narrowing the first interval at the second height, and has a second section of the second region. The first section and the second section are arranged in the region where the connecting end is not arranged, and the section connecting the first section, the second section, and the third step is Y-shaped in a plan view. It has a shape, and the first connector connected to the first antenna structure is mounted on the first end, and the second connector connected to the second antenna structure is mounted on the second end. A third connector connected to a control circuit for controlling the first antenna structure and the second antenna structure is mounted at the third end . As an example, the dimensional difference between the second height and the first height is made the same as the thickness of the battery.

Claims (6)

A first conductor composed of a transmission line conductor and a ground conductor is formed on the first main surface of a first base material made of a thermoplastic resin, and at least a plurality of the transmission line conductors among the first conductors are formed at a predetermined pitch. A base, a coverlay made of a thermoplastic resin covering each of the transmission line conductors, a first shield formed on a second main surface of a second base material whose second conductor is made of a thermoplastic resin, and a third conductor. Has a second shield formed on a third base material made of a thermoplastic resin, the coverlay is adhered to the first main surface of the first base material, and the first base material is the first. The second conductor surface of the first shield is adhered to the surface opposite to the main surface, and the third conductor of the second shield is adhered to the surface of the coverlay opposite to the adhesive surface to the first base material. The surfaces are bonded, the third conductor surface is joined to the second conductor surface, and the second conductor and the third conductor are arranged so as to surround the transmission line conductor. It has a main body with a structure and is used for electronic devices with a built-in battery.
The main body includes a first transmission unit having a first end of a first height, a first step formed by bending corresponding to the thickness of the battery, and a first line of the transmission line conductors, and the first transmission line. The second end, which is arranged at one end and the first interval and has the same height as the first end, the second step formed by bending corresponding to the thickness of the battery, and the second line of the transmission line conductor. A second transmission unit having the above, a third end having the same height as the first end, and a third step formed by bending corresponding to the thickness of the battery, and the first line and the second line. Is a transmission line having a third transmission unit having an integral structure arranged in parallel from a connection end having a second height to the third end. The first transmission unit, the second transmission unit, and the third transmission unit have an uneven surface due to the coverlay being thermocompression bonded to form a through hole between the transmission line conductor and the transmission line conductor. Has a first region in which a surface is formed and a second region in which a surface flatter than the first region is formed because the through hole is not formed, and the connecting end is arranged in the second region. The transmission line according to claim 1, wherein the transmission line is provided. A part of the surface of the third conductor on the opposite side of the cover lay is exposed so as to be externally connectable, and the windows are formed at predetermined intervals, and the windows are arranged in the first region. 2. The transmission line according to claim 2. The first transmission unit has a first section that is bent and formed in a direction that narrows the first interval at the second height, and the second transmission unit has a direction that narrows the first interval at the second height. The transmission line according to claim 2 or 3, wherein the transmission line has a second section bent and formed in the same direction, and the first section and the second section are arranged in the second region. The transmission line according to any one of claims 1 to 4, wherein the area including the connecting end in the main body has a Y-shape or a V-shape in a plan view. A first connector for connecting to the first antenna structure is mounted on the first end, a second connector for connecting to the second antenna structure is mounted on the second end, and the second connector is connected to the control circuit at the third end. The transmission line according to any one of claims 1 to 5, wherein a third connector is mounted.

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