WO2021235263A1 - 信号伝送線路 - Google Patents

信号伝送線路 Download PDF

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Publication number
WO2021235263A1
WO2021235263A1 PCT/JP2021/017817 JP2021017817W WO2021235263A1 WO 2021235263 A1 WO2021235263 A1 WO 2021235263A1 JP 2021017817 W JP2021017817 W JP 2021017817W WO 2021235263 A1 WO2021235263 A1 WO 2021235263A1
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WO
WIPO (PCT)
Prior art keywords
conductor
base material
signal transmission
transmission line
mounting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/017817
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English (en)
French (fr)
Japanese (ja)
Inventor
伸郎 池本
汗人 飯田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to CN202190000476.9U priority Critical patent/CN219042063U/zh
Priority to JP2022524392A priority patent/JP7205667B2/ja
Publication of WO2021235263A1 publication Critical patent/WO2021235263A1/ja
Priority to US17/979,034 priority patent/US12341233B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
    • H01P3/08—Microstrips; Strip lines
    • H01P3/085—Triplate lines
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details

Definitions

  • the present invention relates to a signal transmission line in which a conductor pattern is formed on an insulating base material.
  • the signal transmission line described in Patent Document 1 has a hollow portion in the laminated body. More specifically, the laminate is formed by laminating a plurality of resin layers.
  • the signal transmission line includes a signal conductor and a plurality of ground conductors.
  • the signal conductor is arranged in the first resin layer, and the plurality of ground conductors are arranged in the second resin layer and the third resin layer, respectively.
  • the first resin layer is arranged between the second resin layer and the third resin layer.
  • the first resin layer and the second resin layer are joined so as to have a gap between them. Further, the first resin layer and the third resin layer are joined so as to have a gap between them.
  • the first resin layer and the second resin layer are joined by a plurality of interlayer connecting conductors arranged in parallel with the signal conductor.
  • the plurality of interlayer connection conductors are arranged at equal intervals along the signal conductor.
  • the first resin layer and the third resin layer are joined by a plurality of interlayer connecting conductors arranged in parallel with the signal conductor.
  • the plurality of interlayer connection conductors are arranged at equal intervals along the signal conductor.
  • the signal transmission line may be curved in the middle of the extending direction so that the direction parallel to the main surface of the laminated body changes.
  • an object of the present invention is to realize a signal transmission line in which a large change in characteristic impedance in the signal transmission direction is unlikely to occur.
  • the signal transmission line of the present invention includes a first base material, a second base material, and a plurality of first conductive bonding materials.
  • the first substrate has a first main surface, a second main surface, a first side surface, and a second side surface, and includes a first signal conductor having a shape mainly parallel to the first main surface and the second main surface. ..
  • the second base material is arranged so as to face the first main surface, and the first ground conductor is arranged.
  • the plurality of first conductive bonding materials bond the first base material and the second base material so as to have a gap between the first main surface and the second base material.
  • the first base material includes a plurality of first mounting conductors and a plurality of second mounting conductors to which a plurality of first conductive bonding materials are bonded to each other on the first main surface.
  • the plurality of first mounting conductors run parallel to the first signal conductor, have a plurality of first non-mounting portions arranged at intervals from each other, and are arranged on the first side surface side with respect to the first signal conductor.
  • the plurality of second mounting conductors run parallel to the first signal conductor, have a plurality of second non-mounting portions arranged at intervals from each other, and are arranged on the second side surface side with respect to the first signal conductor.
  • the positions of the plurality of first non-mounting portions and the positions of the plurality of second non-mounting portions are different in the extending direction of the first signal conductor.
  • FIG. 1 is an exploded perspective view of the signal transmission line 1 according to the first embodiment.
  • 2 (A), 2 (B), 2 (C), 2 (D), and 2 (E) are exploded plan views of the signal transmission line 1 according to the first embodiment.
  • FIG. 3 is a partially enlarged plan view of the first base material 10 according to the first embodiment.
  • 4 (A) and 4 (B) are cross-sectional views of the signal transmission line 1 according to the first embodiment.
  • 5 (A), 5 (B), and 5 (C) are cross-sectional views showing a configuration in each step in the method of manufacturing the signal transmission line 1.
  • FIG. 6 is a side view showing an example of the usage mode of the signal transmission line 1.
  • FIG. 1 is an exploded perspective view of the signal transmission line 1 according to the first embodiment.
  • 2 (A), 2 (B), 2 (C), 2 (D), and 2 (E) are exploded plan views of the signal transmission line 1 according to the first embodiment.
  • FIG. 3 is
  • FIG. 7 is an enlarged plan view of a part of the first base material 10A of the signal transmission line 1A according to the second embodiment.
  • 8 (A), 8 (B), 8 (C), 8 (D), and 8 (E) are exploded plan views of the signal transmission line 1B according to the third embodiment.
  • .. 9 (A), 9 (B), 9 (C), 9 (D), and 9 (E) are exploded plan views of the signal transmission line 1C according to the fourth embodiment.
  • FIG. 10 is a partially enlarged plan view of the first base material 10D of the signal transmission line 1D according to the fifth embodiment.
  • FIG. 11 is a cross-sectional view of the signal transmission line 1E according to the sixth embodiment.
  • FIG. 1 is an exploded perspective view of the signal transmission line 1 according to the first embodiment.
  • 2 (A), 2 (B), 2 (C), 2 (D), and 2 (E) are exploded plan views of the signal transmission line 1 according to the first embodiment.
  • FIG. 3 is a partially enlarged plan view of the first base material 10 according to the first embodiment.
  • 4 (A) and 4 (B) are cross-sectional views of the signal transmission line 1 according to the first embodiment.
  • 4 (A) and 4 (B) are cross-sectional views of a plane orthogonal to the extending direction of the signal conductor 111 in the signal transmission line 1.
  • the position of the signal conductor 111 in the extending direction is different between FIG. 4A and FIG. 4B.
  • the shapes of the respective components are partially or wholly exaggerated.
  • the signal transmission line 1 includes a first base material 10, a second base material 21, a protective film 30, and a plurality of conductive bonding materials 50.
  • the first base material 10 has, for example, a shape extending in a predetermined direction (x-axis direction in the figure).
  • the dimension of the first base material 10 in the x-axis direction is larger than the dimension in the y-axis direction.
  • the y-axis direction is a direction orthogonal to the x-axis direction and is a direction orthogonal to the z-axis direction which is the thickness direction of the first base material 10.
  • the shape of the first base material 10 is not limited to this.
  • the first base material 10 includes a plurality of insulator layers (insulator layer 11, insulator layer 12, and insulator layer 13). Each of the plurality of insulator layers 11, 12, and 13 has flexibility.
  • the plurality of insulator layers 11, 12, and 13 are made of, for example, a thermoplastic resin containing a liquid crystal polymer as a main component.
  • the plurality of insulator layers 11, 12, and 13 may be made of other materials as long as they have flexibility.
  • flexibility is a property that can be curved by a predetermined external force.
  • the plurality of insulator layers 11, 12, and 13 are laminated in the order of the insulator layer 12, the insulator layer 11, and the insulator layer 13 in the thickness direction (z-axis direction) of the first base material 10.
  • the insulator layer 11 has a main surface F11 and a main surface R11.
  • a signal conductor 111, a plurality of auxiliary conductors 112, a plurality of auxiliary conductors 113, and a plurality of auxiliary conductors 114 are arranged on the main surface F11 of the insulator layer 11.
  • the signal conductor 111, the plurality of auxiliary conductors 112, the plurality of auxiliary conductors 113, and the plurality of auxiliary conductors 114 are formed of, for example, copper foil or the like.
  • the signal conductor 111 corresponds to the "first signal conductor" of the present invention.
  • the signal conductor 111 is a linear conductor extending in the x-axis direction.
  • the signal conductor 111 is arranged at a position substantially in the center of the insulator layer 11 in the y-axis direction. In other words, the signal conductor 111 is arranged between the first side surface SL1 and the second side surface SL2 in the insulator layer 11.
  • the plurality of auxiliary conductors 112 are rectangular in a plan view.
  • the plurality of auxiliary conductors 112 are arranged on the first side surface SL1 side with respect to the signal conductor 111.
  • the plurality of auxiliary conductors 112 are arranged between the signal conductor 111 and the first side surface SL1 in a plan view.
  • the plurality of auxiliary conductors 112 are arranged along the extending direction (x-axis direction) of the signal conductor 111.
  • the plurality of auxiliary conductors 112 are arranged at intervals along the arrangement direction.
  • the plurality of auxiliary conductors 113 are rectangular in a plan view.
  • the plurality of auxiliary conductors 113 are arranged on the second side surface SL2 side with respect to the signal conductor 111.
  • the plurality of auxiliary conductors 113 are arranged between the signal conductor 111 and the second side surface SL2 in a plan view.
  • the plurality of auxiliary conductors 113 are arranged along the extending direction (x-axis direction) of the signal conductor 111.
  • the plurality of auxiliary conductors 113 are arranged at intervals along the arrangement direction.
  • the positions of the plurality of auxiliary conductors 112 and the positions of the plurality of auxiliary conductors 113 are different in the extending direction (x-axis direction) of the signal conductor 111. More specifically, the auxiliary conductor 112 and the auxiliary conductor 113 are arranged alternately in the extending direction of the signal conductor 111.
  • the plurality of auxiliary conductors 114 are arranged at both ends of the insulator layer 11 in the x-axis direction. More specifically, one auxiliary conductor 114 is arranged between one end of the signal conductor 111 and one end face of the insulator layer 11, and the other auxiliary conductor 114 is insulated from the other end of the signal conductor 111. It is arranged between the other end face of the body layer 11.
  • the insulator layer 11 is formed with an interlayer connecting conductor 115, a plurality of interlayer connecting conductors 116, a plurality of interlayer connecting conductors 117, and an interlayer connecting conductor 118 in a shape penetrating from the first main surface F11 to the second main surface R11. Will be done.
  • the plurality of interlayer connection conductors 115, the plurality of interlayer connection conductors 116, the plurality of interlayer connection conductors 117, and the plurality of interlayer connection conductors 118 are conductive pastes filled in through holes penetrating the insulator layer 11 in the thickness direction. It is realized by solidifying.
  • the interlayer connection conductor 115 overlaps both ends of the signal conductor 111 in a plan view. One end of the interlayer connection conductor 115 is connected to the signal conductor 111, respectively.
  • the plurality of interlayer connecting conductors 116 overlap each other with the plurality of auxiliary conductors 112 in a plan view. One end of the plurality of interlayer connecting conductors 116 is connected to each of the plurality of auxiliary conductors 112.
  • the plurality of interlayer connecting conductors 117 overlap each of the plurality of auxiliary conductors 113 in a plan view. One end of the plurality of interlayer connecting conductors 117 is connected to each of the plurality of auxiliary conductors 113.
  • the interlayer connecting conductor 118 overlaps with the plurality of auxiliary conductors 114 in a plan view. One end of the interlayer connection conductor 118 is connected to each of the plurality of auxiliary conductors 114.
  • the insulator layer 12 has a main surface F12 and a main surface R12.
  • the main surface R12 of the insulator layer 12 abuts on the main surface F11 of the insulator layer 11.
  • a mounting conductor 121 is arranged on the main surface F12 of the insulator layer 12.
  • the mounting conductor 121 is formed of, for example, a copper foil or the like.
  • the mounting conductor 121 is an annular conductor pattern, and has a shape along the end surface of the insulator layer 12, the first side surface SL1, and the second side surface SL2.
  • the mounting conductor 121 overlaps the plurality of auxiliary conductors 112, the plurality of auxiliary conductors 113, and the plurality of auxiliary conductors 114 of the insulator layer 11 in a plan view. Further, the mounting conductor 121 does not overlap with the signal conductor 111 in a plan view and surrounds the signal conductor 111.
  • the portion of the mounting conductor 121 on the first side surface SL1 side of the signal conductor 111 corresponds to the "first mounting conductor" of the present invention.
  • the portion of the mounting conductor 121 on the second side surface SL2 side of the signal conductor 111 corresponds to the "second mounting conductor" of the present invention.
  • a protective film 1210 is formed on the main surface F12 of the insulator layer 12.
  • the protective film 1210 has a plurality of openings 402 and a plurality of openings 403.
  • the protective film 1210 is realized by, for example, a so-called resist film.
  • the plurality of openings 402 overlap with the portion of the mounting conductor 121 on the first side surface SL1 side to expose the mounting conductor 121.
  • the plurality of openings 402 are arranged at intervals from each other along a portion of the mounting conductor 121 that is close to the first side surface SL1 and extends along the first side surface SL1.
  • the arrangement intervals of the plurality of openings 402 are, for example, equal intervals.
  • the portion of the plurality of openings 402 where the mounting conductor 121 is not exposed becomes the non-opening 402N (see, for example, FIG. 3).
  • the plurality of openings 403 overlap with the portion of the mounting conductor 121 on the second side surface SL2 side to expose the mounting conductor 121.
  • the plurality of openings 403 are arranged close to the second side surface SL2 of the mounting conductor 121 and spaced apart from each other along a portion extending along the second side surface SL2.
  • the arrangement intervals of the plurality of openings 403 are, for example, equal intervals.
  • the portion between the plurality of openings 403 where the mounting conductor 121 is not exposed becomes the non-opening 403N (see, for example, FIG. 3).
  • the positions of the plurality of non-openings 402N and the positions of the plurality of non-openings 403N are different in the extending direction (x-axis direction) of the signal conductor 111 and do not overlap. More specifically, the plurality of non-openings 402N and the plurality of non-openings 403N are alternately arranged in the extending direction (x-axis direction) of the signal conductor 111.
  • the regions of the plurality of openings 402 and the regions of the plurality of openings 403 do not all overlap, but partially overlap.
  • the insulator layer 12 is formed with a plurality of interlayer connecting conductors 122, a plurality of interlayer connecting conductors 123, and a plurality of interlayer connecting conductors 124 in a shape penetrating from the first main surface F12 to the second main surface R12.
  • the plurality of interlayer connection conductors 122, the plurality of interlayer connection conductors 123, and the plurality of interlayer connection conductors 124 are realized by solidifying the conductive paste filled in the through holes penetrating the insulator layer 12 in the thickness direction. Will be done.
  • the plurality of interlayer connection conductors 122 overlap each other of the plurality of non-openings 402N of the mounting conductor 121 in a plan view.
  • One end of the plurality of interlayer connection conductors 122 is connected to a portion of the mounting conductor 121 that overlaps the non-opening portion 402N.
  • the other end of the plurality of interlayer connecting conductors 122 is connected to each of the plurality of auxiliary conductors 112 of the insulator layer 11.
  • the plurality of interlayer connection conductors 123 overlap each other of the plurality of non-openings 403N of the mounting conductor 121 in a plan view.
  • One end of the plurality of interlayer connection conductors 123 is connected to a portion of the mounting conductor 121 that overlaps the non-opening portion 403N.
  • the other end of the plurality of interlayer connecting conductors 123 is connected to each of the plurality of auxiliary conductors 113 of the insulator layer 11.
  • the plurality of interlayer connection conductors 124 overlap each other along the end portion of the insulator layer 12 in the mounting conductor 121 in a plan view.
  • One end of the plurality of interlayer connection conductors 124 is connected to the mounting conductor 121, respectively.
  • the other end of the plurality of interlayer connecting conductors 124 is connected to each of the plurality of auxiliary conductors 114 of the insulator layer 11.
  • the insulator layer 13 has a main surface F13 and a main surface R13.
  • the main surface F13 of the insulator layer 13 abuts on the main surface R11 of the insulator layer 11.
  • a ground conductor 131 and a plurality of terminal conductors 132 are arranged on the main surface R13 of the insulator layer 13.
  • the ground conductor 131 and the plurality of terminal conductors 132 are physically and electrically separated by the conductor non-forming portion 1320.
  • the ground conductor 131 and the plurality of terminal conductors 132 are formed of, for example, copper foil or the like.
  • the ground conductor 131 is arranged on substantially the entire surface of the main surface R13.
  • the plurality of terminal conductors 132 have a rectangular conductor pattern in a plan view, and overlap each other at both ends of the signal conductor 111.
  • the insulator layer 13 has a shape that penetrates from the first main surface F13 to the second main surface R13, and has a plurality of interlayer connection conductors 135, a plurality of interlayer connection conductors 136, a plurality of interlayer connection conductors 137, and a plurality of interlayer connection conductors.
  • Conductor 138 is formed.
  • the plurality of interlayer connection conductors 135, the plurality of interlayer connection conductors 136, the plurality of interlayer connection conductors 137, and the plurality of interlayer connection conductors 138 are conductive pastes filled in through holes penetrating the insulator layer 13 in the thickness direction. It is realized by solidifying.
  • the plurality of interlayer connecting conductors 135 overlap each of the plurality of terminal conductors 132 in a plan view. One end of the plurality of interlayer connection conductors 135 is connected to each of the plurality of terminal conductors 132. The other end of the plurality of interlayer connecting conductors 135 is connected to the interlayer connecting conductor 115 of the insulator layer 11.
  • the plurality of interlayer connecting conductors 136 overlap with the ground conductor 131 in a plan view.
  • the plurality of interlayer connection conductors 136 are arranged in the vicinity of the first side surface SL1 of the insulator layer 13 along the first side surface SL1.
  • One end of the plurality of interlayer connecting conductors 136 is connected to the ground conductor 131, respectively.
  • the other end of the plurality of interlayer connecting conductors 136 is connected to each of the plurality of interlayer connecting conductors 116 of the insulator layer 11.
  • the plurality of interlayer connecting conductors 137 overlap with the ground conductor 131 in a plan view.
  • the plurality of interlayer connection conductors 137 are arranged in the vicinity of the second side surface SL2 of the insulator layer 13 along the second side surface SL2.
  • One end of the plurality of interlayer connecting conductors 137 is connected to the ground conductor 131, respectively.
  • the other end of the plurality of interlayer connection conductors 137 is connected to each of the plurality of interlayer connection conductors 117 of the insulator layer 11.
  • the plurality of interlayer connecting conductors 138 overlap with the ground conductor 131 in a plan view.
  • the plurality of interlayer connection conductors 138 are arranged in the vicinity of both end faces of the insulator layer 13.
  • One end of the plurality of interlayer connecting conductors 138 is connected to the ground conductor 131, respectively.
  • the other end of the plurality of interlayer connection conductors 138 is connected to the plurality of interlayer connection conductors 118 of the insulator layer 11, respectively.
  • the second base material 21 has an insulating property and is flexible.
  • the planar shape of the second base material 21 is, for example, substantially the same as the planar shape of the first base material 10.
  • the second base material 21 has a main surface F21 and a main surface R21.
  • a ground conductor 211 is formed on the main surface R21 of the second base material 21.
  • the ground conductor 211 is formed on substantially the entire surface of the main surface R21.
  • the ground conductor 211 is formed of, for example, copper foil or the like.
  • the protective film 30 is realized by what is called a resist film.
  • the protective film 30 has a plurality of terminal openings 320.
  • the plurality of terminal openings 320 are arranged near both ends of the protective film 30.
  • the protective film 30 is arranged on the main surface R13 of the insulator layer 13. At this time, the plurality of terminal openings 320 of the protective film 30 overlap the plurality of terminal conductors 132. Further, the protective film 30 has a ground opening 3200 around the terminal opening 320 at a position overlapping the ground conductor 131. The ground opening 3200 makes it possible to connect the ground conductor 131 to an external ground conductor or the like.
  • the first base material 10 and the second base material 21 are electrically and physically connected by a plurality of conductive bonding materials 50. More specifically, in the second base material 21, the main surface R21 faces the main surface F12 (corresponding to the first main surface of the first base material 10) of the insulator layer 12 of the first base material 10. , Is arranged with respect to the first base material 10.
  • a conductive bonding material 50 is bonded to each of the plurality of openings 402 and openings 403 formed in the mounting conductor 121. These conductive bonding materials 50 are also bonded to the ground conductor 211 of the second base material 21. As a result, the mounting conductor 121 and the ground conductor 211 are electrically and physically connected by the conductive bonding material 50.
  • the signal transmission line 1 can realize a stripline type transmission line in which the signal conductor 111 is sandwiched between the ground conductor 211 and the ground conductor 131 from both sides in the thickness direction (z-axis direction).
  • the thickness of the signal transmission line can be reduced by the line width of the same signal line when forming the desired impedance line, as compared with the case where the void SP is not provided. Further, by having the gap SP, the signal transmission line 1 becomes easy to bend.
  • the bending structure here is in the middle of the extending direction so that the direction parallel to the main surface of the signal transmission line 1 (the main surface of the first base material 10 and the main surface of the second base material 21) changes. It means to bend.
  • the plurality of openings 402 and the plurality of openings 403 are arranged at different positions in the extending direction of the signal conductor 111.
  • the portion where the first base material 10 and the second base material 21 are connected by the plurality of conductive bonding materials 50 is connected by the plurality of openings 402 in the extending direction (x-axis direction) of the signal conductor 111. It is different between the first side surface SL1 side of the signal conductor 111 and the second side surface SL2 side of the signal conductor 111 connected by the plurality of openings 403. More specifically, the portion joined by the conductive joining material 50 on the first side surface SL1 side of the signal conductor 111 and the portion joined by the conductive joining material 50 on the second side surface SL2 side of the signal conductor 111 are , Partially overlaps and does not partially overlap in the extending direction of the signal conductor 111.
  • the portion where the first base material 10 and the second base material 21 are not connected is the second of the signal conductor 111 which is not connected by the plurality of non-openings 402N in the extending direction (x-axis direction) of the signal conductor 111. It differs between the one side surface SL1 side and the second side surface SL2 side of the signal conductor 111 which is not connected by the plurality of non-openings 403N.
  • the locations where the first base material 10 and the second base material 21 are not connected do not match on both sides of the signal conductor 111. Therefore, there is no place where the first base material 10 and the second base material 21 are not connected in the extending direction of the signal conductor 111, that is, the extending direction of the signal transmission line 1.
  • the signal transmission line 1 can prevent local occurrence of a portion that is significantly more likely to bend than other locations in the signal transmission direction (x-axis direction). That is, the signal transmission line 1 can suppress the formation of a locally curved portion, and can suppress a large change in the characteristic impedance in the signal transmission direction.
  • the signal transmission line 1 can further suppress the formation of a local curved portion, and can further suppress the change in the characteristic impedance in the signal transmission direction. Further, with this configuration, it is possible to suppress the application of a large stress to bending to the interlayer connecting conductor 122 and the interlayer connecting conductor 123, and the reliability of the signal transmission line 1 is improved.
  • the protective film 1210 is arranged so as to overlap the signal conductor 111. However, it is preferable that the protective film 1210 does not overlap with the signal conductor 111.
  • an opening may be provided at a position overlapping with the signal conductor 111. The opening should be as large as possible within the range in which the above-mentioned openings 402 and 403 can be formed individually. As a result, the area of the protective film 1210 arranged between the signal conductor 111 and the ground conductor 211 can be reduced, and the above-mentioned effect of reducing the dielectric loss is improved.
  • 5 (A), 5 (B), and 5 (C) are cross-sectional views showing a configuration in each step in the method of manufacturing the signal transmission line 1.
  • a plurality of insulator layers 11, 12, and 13 on which a predetermined conductor is formed are laminated, and the laminated body is formed by heating and pressurizing.
  • the protective film 1210 and the protective film 30 are formed on the laminated body.
  • the protective film 1210 is formed with a plurality of openings 402 and a plurality of openings 403 so as to expose a part of the mounting conductor 121.
  • the conductive bonding material 50 for example, solder is applied to the plurality of openings 402 and the plurality of openings 403. Then, the second base material 21 is arranged so that the ground conductor 211 side is on the first base material 10 side, and is brought close to the first base material 10.
  • the conductive bonding material 50 is solidified while maintaining the state in which the first base material 10 and the second base material 21 are arranged so as to have the void SP. ..
  • the signal transmission line 1 having the above configuration can be manufactured.
  • FIG. 6 is a side view showing an example of the usage mode of the signal transmission line.
  • a connector 500 is attached to the signal transmission line 1.
  • the connector 500 is connected to the terminal conductor 132 of the signal transmission line 1.
  • the connector 500 is connected to the connector of the circuit board 2 to which the signal transmission line 1 is connected.
  • the electronic component 3 is mounted on the circuit board 2 separately from the signal transmission line 1.
  • the signal transmission line 1 is arranged so as to straddle the electronic component 3. Therefore, the signal transmission line 1 has a curved portion BT in the middle of the extending direction (signal transmission direction).
  • the curved portion BT corresponds to the "first curved portion" of the present invention.
  • the signal transmission line 1 has the first base material 10 and the second base material 21 conductive on both sides of the signal conductor 111 in the extending direction (signal transmission direction) of the signal transmission line 1.
  • the curved portion BT is unlikely to have a locally sharp curved shape in the extending direction (signal transmission direction) of the signal transmission line 1.
  • a large change in the characteristic impedance in the signal transmission direction can be suppressed, and a decrease in the transmission characteristic of the signal transmission line 1 can be suppressed.
  • deterioration of the characteristics of the electronic component module including the signal transmission line 1, the circuit board 2, and the electronic component 3 can be suppressed.
  • FIG. 7 is an enlarged plan view of a part of the first base material 10A of the signal transmission line 1A according to the second embodiment.
  • the signal transmission line 1A according to the second embodiment has a first base material 10A and a second base material (not shown) with respect to the signal transmission line 1 according to the first embodiment. Is different in that is bent in the middle.
  • the other configurations of the signal transmission line 1A are the same as those of the signal transmission line 1, and the description of the same parts will be omitted.
  • the first base material 10A and the second base material have a curved portion CV at an intermediate position in the extending direction.
  • the curved portion CV here means a shape that bends so that the direction parallel to the first side surface SL1 and the second side surface SL2 of the first base material 10A changes.
  • the curved portion CV corresponds to the "second curved portion" of the present invention.
  • the signal transmission line 1A can exert the same effect as the signal transmission line 1.
  • the opening 402 and the opening 403 are formed so as to straddle the curved portion BT. That is, the portion where the first base material 10A and the second base material are not connected is different from the curved portion BT, and the first base material 10A and the second base material are different in the range straddling the curved portion BT. , Connected by a conductive bonding material. This makes it possible to improve the strength of the curved portion BT, which is more likely to be damaged by an external force than other portions. Therefore, the reliability of the signal transmission line 1A is improved.
  • the signal transmission line 1B according to the third embodiment is the first.
  • the signal transmission line 1 according to the first embodiment is different in that the configuration of the first base material 10B and the third base material 22 are provided.
  • the other configurations of the signal transmission line 1B are the same as those of the signal transmission line 1, and the description of the same parts will be omitted.
  • the first base material 10B is different from the first base material 10 in the configuration of the insulator layer 13B.
  • the insulator layer 13B has a main surface F13 and a main surface R13.
  • the main surface F13 of the insulator layer 13B abuts on the main surface R11 of the insulator layer 11.
  • a mounting conductor 139 is arranged on the main surface R13 of the insulator layer 13B.
  • the mounting conductor 139 is formed of, for example, a copper foil or the like.
  • the mounting conductor 139 is an annular conductor pattern and has a shape along the end face of the insulator layer 13B, the first side surface SL1, and the second side surface SL2.
  • the mounting conductor 139 overlaps the plurality of auxiliary conductors 112 and the plurality of auxiliary conductors 113 of the insulator layer 11 in a plan view. Further, the mounting conductor 139 does not overlap with the signal conductor 111 in a plan view and surrounds the signal conductor 111.
  • the mounting conductor 139 overlaps the mounting conductor 121 in a plan view.
  • the portion of the mounting conductor 139 on the first side surface SL1 side of the signal conductor 111 corresponds to the "third mounting conductor" of the present invention.
  • the portion of the mounting conductor 139 on the second side surface SL2 side of the signal conductor 111 corresponds to the "fourth mounting conductor" of the present invention.
  • a protective film 1310 is formed on the main surface R13 of the insulator layer 13B.
  • the protective film 1310 has a plurality of openings 404 and a plurality of openings 405.
  • the protective film 1310 is realized by, for example, a so-called resist film.
  • the plurality of openings 404 overlap with the portion of the mounting conductor 139 on the first side surface SL1 side to expose the mounting conductor 139.
  • the plurality of openings 404 are arranged at intervals from each other along a portion of the mounting conductor 139 that is close to the first side surface SL1 and extends along the first side surface SL1.
  • the arrangement intervals of the plurality of openings 404 are, for example, equal intervals.
  • the portion between the plurality of openings 404 where the mounting conductor 139 is not exposed becomes a non-opening portion (corresponding to the "third non-mounting portion" of the present invention).
  • the plurality of openings 405 overlap with the portion of the mounting conductor 139 on the second side surface SL2 side to expose the mounting conductor 139.
  • the plurality of openings 405 are arranged at intervals from each other along a portion of the mounting conductor 139 that is close to the second side surface SL2 and extends along the second side surface SL2.
  • the arrangement intervals of the plurality of openings 405 are, for example, equal intervals.
  • the portion between the plurality of openings 405 where the mounting conductor 139 is not exposed becomes a non-opening portion (corresponding to the "fourth non-mounting portion" of the present invention).
  • the position of the non-opening with respect to the plurality of openings 404 and the position of the non-opening with respect to the plurality of openings 405 are different in the extending direction (x-axis direction) of the signal conductor 111 and do not overlap. More specifically, in the extending direction (x-axis direction) of the signal conductor 111, the positions of the non-openings with respect to the plurality of openings 404 and the positions of the non-openings with respect to the plurality of openings 405 are alternately arranged. ..
  • the position of the non-opening portion of the mounting conductor 139 with respect to the plurality of openings 404 and the position of the non-opening portion 402N with respect to the plurality of openings 402 of the mounting conductor 121 are in the extending direction (x-axis direction) of the signal conductor 111. , Different, do not overlap.
  • the position of the non-opening with respect to the plurality of openings 405 of the mounting conductor 139 and the position of the non-opening 403N with respect to the plurality of openings 403 of the mounting conductor 121 differ in the extending direction (x-axis direction) of the signal conductor 111. ,Do not overlap.
  • a plurality of interlayer connecting conductors 136B and a plurality of interlayer connecting conductors 137B are formed in the insulator layer 13B so as to penetrate from the first main surface F13 to the second main surface R13.
  • the plurality of interlayer connection conductors 136B and the plurality of interlayer connection conductors 137B are realized by solidifying the conductive paste filled in the through holes penetrating the insulator layer 12 in the thickness direction.
  • the plurality of interlayer connection conductors 136B overlap each other with respect to the plurality of openings 404 of the mounting conductor 139 in a plan view.
  • One end of the plurality of interlayer connection conductors 136B is connected to a portion of the mounting conductor 139 that overlaps the non-opening portion.
  • the other end of the plurality of interlayer connecting conductors 136B is connected to the auxiliary conductor 112 via the interlayer connecting conductor 116 of the insulator layer 11, respectively.
  • the plurality of interlayer connection conductors 137B each overlap the non-openings of the mounting conductor 139 with respect to the plurality of openings 405 in a plan view.
  • One end of the plurality of interlayer connection conductors 137B is connected to a portion of the mounting conductor 139 that overlaps the non-opening portion.
  • the other end of the plurality of interlayer connecting conductors 137B is connected to the auxiliary conductor 113 via the interlayer connecting conductor 117 of the insulator layer 11, respectively.
  • the third base material 22 is the same as the second base material 21 in the basic configuration.
  • the third base material 22 has an insulating property and is flexible.
  • the planar shape of the third substrate 22 is substantially the same as the planar shape of the first substrate 10B, for example.
  • the third base material 22 is not arranged at the exposed portion of the terminal conductor 132 of the first base material 10B.
  • the third base material 22 has a main surface F22 and a main surface R22.
  • a ground conductor 221 is formed on the main surface F22 of the third base material 22.
  • the ground conductor 221 is formed on substantially the entire surface of the main surface F22.
  • the ground conductor 221 is formed of, for example, a copper foil or the like.
  • the ground conductor 221 corresponds to the "second ground conductor" of the present invention.
  • the first base material 10B and the third base material 22 are electrically and physically connected by a plurality of conductive bonding materials (corresponding to the "second conductive bonding material" of the present invention). More specifically, in the third base material 22, the main surface F22 faces the main surface R13 (corresponding to the second main surface of the first base material 10B) of the insulator layer 13B of the first base material 10B. , Arranged for the first substrate 10B.
  • a conductive bonding material is bonded to each of the plurality of openings 404 and openings 405 formed in the mounting conductor 139. These conductive bonding materials are also bonded to the ground conductor 221 of the third base material 22. As a result, the mounting conductor 139 and the ground conductor 221 are electrically and physically connected by the conductive bonding material.
  • the signal transmission line 1 can realize a stripline type transmission line in which the signal conductor 111 is sandwiched between the ground conductor 211 and the ground conductor 221 from both sides in the thickness direction (z-axis direction).
  • a void SP is formed between the first base material 10B and the second base material 21 and between the first base material 10B and the third base material 22, respectively. That is, it is possible to realize a structure having a gap SP between the signal conductor 111 and the ground conductor 211 and between the signal conductor 111 and the ground conductor 221. As a result, the signal transmission line 1 can reduce the dielectric loss and improve the transmission characteristics.
  • the thickness of the signal transmission line can be reduced by the line width of the same signal line when forming the desired impedance line, as compared with the case where the void SP is not provided. Further, by having the gap SP, the signal transmission line 1 becomes easy to bend.
  • the bending structure here is in the middle of the extending direction so that the direction parallel to the main surface of the signal transmission line 1 (the main surface of the first base material 10 and the main surface of the second base material 21) changes. It means to bend.
  • the plurality of openings 404 and the plurality of openings 405 are arranged at different positions in the extending direction of the signal conductor 111.
  • the locations where the first base material 10B and the third base material 22 are not connected do not match on both sides of the signal conductor 111. Therefore, there is no place where the first base material 10 and the third base material 22 are not connected in the extending direction of the signal conductor 111, that is, the extending direction of the signal transmission line 1.
  • the signal transmission line 1B can prevent local occurrence of a portion that is significantly more likely to bend than other locations in the signal transmission direction (x-axis direction). That is, the signal transmission line 1B can suppress the formation of a local curved portion, and can suppress a large change in the characteristic impedance in the signal transmission direction.
  • the signal transmission line 1B can prevent local occurrence of a portion that is significantly more likely to bend than other locations in the signal transmission direction (x-axis direction). That is, the signal transmission line 1B can further suppress the formation of a local curved portion, and can further suppress a large change in the characteristic impedance in the signal transmission direction.
  • the signal transmission line 1C according to the fourth embodiment is the first.
  • the shapes and arrangements of the opening 402, the opening 403, the opening 404, and the opening 405 are different from those of the signal transmission line 1B according to the third embodiment.
  • Other configurations of the signal transmission line 1C are the same as those of the signal transmission line 1B, and the description of the same parts will be omitted.
  • the positions of the portions do not match in the extending direction of the signal conductor 111 (signal transmission direction: x-axis direction).
  • the positions of the plurality of interlayer connection conductors 122, the positions of the plurality of interlayer connection conductors 123, the positions of the plurality of interlayer connection conductors 136C, and the positions of the plurality of interlayer connection conductors 137C are the directions in which the signal conductor 111 extends.
  • Signal transmission direction: x-axis direction) does not match.
  • the signal transmission line 1C can prevent local occurrence of a portion that is significantly more likely to bend than other locations in the signal transmission direction (x-axis direction). That is, the signal transmission line 1C can further suppress the formation of a local curved portion, and can further suppress a large change in the characteristic impedance in the signal transmission direction.
  • FIG. 10 is a partially enlarged plan view of the first base material 10D of the signal transmission line 1D according to the fifth embodiment.
  • the signal transmission line 1D according to the fifth embodiment includes a plurality of signal conductors (signal conductor 111 and signal conductor 1111) with respect to the signal transmission line 1 according to the first embodiment. It differs in that it comprises a plurality of openings 406 and interlayer connection conductors 124, depending on this configuration.
  • the signal conductor 1111 is arranged between the signal conductor 111 and the first side surface SL1 in the first base material 10D.
  • the signal conductor 1111 runs parallel to the signal conductor 111.
  • the signal conductor 1111 corresponds to the "second signal conductor" of the present invention.
  • a plurality of openings 402 are arranged between the signal conductor 111 and the signal conductor 1111, and the interlayer connecting conductor 122 is formed so as to overlap the non-openings.
  • a plurality of openings 406 for exposing the mounting conductor 121 are arranged between the signal conductor 1111 and the first side surface SL1, and the interlayer connecting conductor 124 is formed so as to overlap the non-openings.
  • the portion of the mounting conductor 121 between the signal conductor 1111 and the first side surface SL1 corresponds to the "fifth mounting conductor" of the present invention, and the non-opening arranged therein corresponds to the "fifth non-mounting" of the present invention. Corresponds to "Department".
  • the position of the non-opening with respect to the plurality of openings 402, the position of the non-opening with respect to the plurality of openings 403, and the position of the non-opening with respect to the plurality of openings 406 are the signal transmission directions (x-axis direction). ) Does not match.
  • the signal transmission line 1D can suppress the formation of a local curved portion and suppress a large change in the characteristic impedance in the signal transmission direction. can.
  • the present embodiment shows a mode in which two signal conductors run in parallel, the same configuration can be applied even in the case of three or more conductors, and the same effect can be obtained.
  • FIG. 11 is a cross-sectional view of the signal transmission line 1E according to the sixth embodiment.
  • the signal transmission line 1E according to the sixth embodiment is different from the signal transmission line 1 according to the first embodiment at the position where the signal conductor 111E is arranged.
  • Other configurations of the signal transmission line 1E are the same as those of the signal transmission line 1, and the description of the same parts will be omitted.
  • the signal conductor 111E is arranged on the main surface F12 of the insulator layer 12.
  • the signal conductor 111E corresponds to the "first signal conductor" of the present invention.
  • the signal conductor 111E is a linear conductor extending in the x-axis direction.
  • the signal conductor 111E is arranged at a position substantially in the center of the insulator layer 12 in the y-axis direction. In other words, the signal conductor 111E is arranged between the first side surface SL1 and the second side surface SL2 in the insulator layer 12.
  • an interlayer connecting conductor 115 (not shown in FIG. 11) is formed so as to penetrate from the first main surface F12 to the second main surface R12.
  • the plurality of interlayer connection conductors 115 are realized by solidifying the conductive paste filled in the through holes penetrating the insulator layer 12 in the thickness direction.
  • the interlayer connection conductor 115 overlaps both ends of the signal conductor 111E in a plan view. One end of the interlayer connection conductor 115 is connected to the signal conductor 111E, respectively.
  • the portions where the first base material 10E and the second base material 21 are not connected do not match on both sides of the signal conductor 111E. Therefore, in the extending direction of the signal conductor 111E, that is, in the extending direction of the signal transmission line 1E, it is suppressed that there is a large portion where the first base material 10E and the second base material 21 are not connected. As a result, the signal transmission line 1E can prevent local occurrence of a portion that is significantly more likely to bend than other locations in the signal transmission direction (x-axis direction). That is, the signal transmission line 1E can suppress the formation of a local curved portion, and can suppress a large change in the characteristic impedance in the signal transmission direction.
  • the example in which the signal conductor 111E is arranged on the main surface F12 of the insulator layer 12 is shown.
  • the signal conductor 111E may be configured to be arranged on the main surface R13 of the insulator layer 13. In this case, an opening is formed in the ground conductor 131 formed on the main surface R13, and the ground conductor 131 and the signal conductor 111E do not overlap in a plan view. Further, in another embodiment, the signal conductor 111E may be arranged on the main surface R13 of the insulator layer 13.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Structure Of Printed Boards (AREA)
  • Waveguides (AREA)
PCT/JP2021/017817 2020-05-21 2021-05-11 信号伝送線路 Ceased WO2021235263A1 (ja)

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JP2022524392A JP7205667B2 (ja) 2020-05-21 2021-05-11 信号伝送線路
US17/979,034 US12341233B2 (en) 2020-05-21 2022-11-02 Signal transmission line

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JP2020088706 2020-05-21

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Citations (5)

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JPS5823403U (ja) * 1981-08-04 1983-02-14 三菱電機株式会社 同軸導波管
JPH07297541A (ja) * 1994-04-26 1995-11-10 Micro Gijutsu Kenkyusho:Kk 基板の回路実装方法
JP2002237553A (ja) * 2000-11-16 2002-08-23 Internatl Business Mach Corp <Ibm> 可撓性コネクタを備えた電子デバイス
JP2011160231A (ja) * 2010-02-01 2011-08-18 Mitsubishi Electric Corp 高周波伝送線路
WO2021095642A1 (ja) * 2019-11-15 2021-05-20 株式会社村田製作所 伝送線路、伝送線路の製造方法及び電子機器

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208608339U (zh) 2016-01-27 2019-03-15 株式会社村田制作所 信号传输线路
CN210579552U (zh) * 2017-01-27 2020-05-19 株式会社村田制作所 多层基板以及电子设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5823403U (ja) * 1981-08-04 1983-02-14 三菱電機株式会社 同軸導波管
JPH07297541A (ja) * 1994-04-26 1995-11-10 Micro Gijutsu Kenkyusho:Kk 基板の回路実装方法
JP2002237553A (ja) * 2000-11-16 2002-08-23 Internatl Business Mach Corp <Ibm> 可撓性コネクタを備えた電子デバイス
JP2011160231A (ja) * 2010-02-01 2011-08-18 Mitsubishi Electric Corp 高周波伝送線路
WO2021095642A1 (ja) * 2019-11-15 2021-05-20 株式会社村田製作所 伝送線路、伝送線路の製造方法及び電子機器

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JPWO2021235263A1 (https=) 2021-11-25

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