WO2022215683A1 - 配線基板および配線基板の製造方法 - Google Patents
配線基板および配線基板の製造方法 Download PDFInfo
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- WO2022215683A1 WO2022215683A1 PCT/JP2022/017051 JP2022017051W WO2022215683A1 WO 2022215683 A1 WO2022215683 A1 WO 2022215683A1 JP 2022017051 W JP2022017051 W JP 2022017051W WO 2022215683 A1 WO2022215683 A1 WO 2022215683A1
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- wiring
- dummy
- wiring portion
- mesh
- wiring board
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- 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
-
- 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
- H05K1/0213—Electrical arrangements not otherwise provided for
Definitions
- An embodiment of the present disclosure relates to a wiring board and a method for manufacturing the wiring board.
- mobile terminal devices such as smartphones and tablets are becoming more sophisticated, smaller, thinner and lighter. Since these mobile terminal devices use a plurality of communication bands, they require a plurality of antennas corresponding to the communication bands.
- mobile terminal devices include telephone antennas, WiFi (Wireless Fidelity) antennas, 3G (Generation) antennas, 4G (Generation) antennas, LTE (Long Term Evolution) antennas, and Bluetooth (registered trademark) antennas. , NFC (Near Field Communication) antennas, etc. are installed.
- WiFi Wireless Fidelity
- 3G Geneeration
- 4G Geneeration
- LTE Long Term Evolution
- Bluetooth registered trademark
- NFC Near Field Communication
- This film antenna is a transparent antenna in which an antenna pattern is formed on a transparent base material, and the antenna pattern is formed in a mesh shape with a conductor portion as a formation portion of an opaque conductor layer and a large number of openings as non-formation portions. of conductive mesh layers.
- one or a plurality of mesh antennas are mounted on a transparent substrate. both exist.
- the presence of the area where the antenna pattern is not formed makes it easy to see the area where the antenna pattern is formed. Therefore, it is required to make it difficult to visually recognize wiring patterns such as an antenna pattern.
- One of the objects of the present embodiment is to provide a wiring board and a method for manufacturing the wiring board, which can make the mesh wiring portion difficult to see.
- a wiring board includes a substrate having transparency, a mesh wiring portion disposed on the substrate and including a plurality of wirings, and a mesh wiring portion disposed around the mesh wiring portion to generate electricity from the wirings.
- a dummy wiring portion including a plurality of dummy wirings that are physically independent, wherein the mesh wiring portion is composed of a predetermined unit pattern repeatedly arranged along the first direction, and the mesh wiring portion is arranged in the first direction;
- the spacing between the wiring portion and the dummy wiring portion is 0.01 times or more and 0.2 times or less the pitch of the unit pattern in the first direction.
- the unit patterns are repeatedly arranged along a second direction different from the first direction, and the mesh wiring portion and the dummy wiring portion are arranged in the second direction.
- the dummy wiring portion may be composed of predetermined dummy unit patterns arranged repeatedly, and the shape of the dummy unit pattern may be the same as the shape of the unit pattern. good.
- a wiring board includes a substrate having transparency, a mesh wiring portion disposed on the substrate and including a plurality of wirings, and a mesh wiring portion disposed around the mesh wiring portion to generate electricity from the wirings.
- the length of the dummy wiring of the isolated pattern is 4.0 times or less the length of the wiring of the unit pattern, and the isolated patterns are separated from each other in the first direction.
- an interval between the unit patterns is 0.01 to 0.2 times the pitch of the unit patterns in the first direction.
- the spacing between the mesh wiring portion and the dummy wiring portion is 0.01 times or more the pitch of the unit pattern in the first direction. It may be 0.2 times or less.
- the unit patterns are repeatedly arranged along a second direction different from the first direction, and the distance between the isolated patterns in the second direction is It may be 0.01 to 0.2 times the pitch of the unit pattern in the second direction.
- the spacing between the mesh wiring portion and the dummy wiring portion is 0.01 times or more the pitch of the unit pattern in the second direction. It may be 0.2 times or less.
- the isolated pattern may include a dummy unit pattern, and the shape of the dummy unit pattern may be the same as the shape of the unit pattern.
- a wiring board according to an embodiment of the present disclosure may have a radio wave transmission/reception function.
- a method for manufacturing a wiring substrate includes steps of preparing a substrate having transparency, a mesh wiring portion including a plurality of wirings on the substrate, and a mesh wiring portion disposed around the mesh wiring portion. and forming a dummy wiring section including a plurality of dummy wirings electrically independent from the wiring, wherein the mesh wiring section is composed of a predetermined unit pattern repeatedly arranged along the first direction. and the spacing between the mesh wiring portion and the dummy wiring portion in the first direction is 0.01 to 0.2 times the pitch of the unit pattern in the first direction. is a manufacturing method.
- a method for manufacturing a wiring substrate includes steps of preparing a substrate having transparency, a mesh wiring portion including a plurality of wirings on the substrate, and a mesh wiring portion disposed around the mesh wiring portion. and forming a dummy wiring section including a plurality of dummy wirings electrically independent from the wiring, wherein the mesh wiring section is composed of a predetermined unit pattern repeatedly arranged along the first direction. and the dummy wiring portion is composed of mutually independent isolated patterns, the length of the isolated pattern is 4.0 times or less the length of the unit pattern, and the isolated patterns are aligned in the first direction.
- the interval between the unit patterns is 0.01 to 0.2 times the pitch of the unit patterns in the first direction.
- the mesh wiring part it is possible to make the mesh wiring part less visible.
- FIG. 1 is a plan view showing a wiring board according to the first embodiment.
- FIG. FIG. 2A is an enlarged plan view (enlarged view of part IIA in FIG. 1) showing the wiring board according to the first embodiment.
- FIG. 2B is an enlarged plan view (enlarged view of IIB portion in FIG. 1) showing the wiring board according to the first embodiment.
- FIG. 3 is a cross-sectional view (cross-sectional view taken along line III--III in FIG. 2A) showing the wiring board according to the first embodiment.
- FIG. 4 is a cross-sectional view (cross-sectional view taken along line IV--IV of FIG. 2A) showing the wiring board according to the first embodiment.
- FIG. 5 is a cross-sectional view (cross-sectional view taken along line VV in FIG.
- FIG. 6A is a cross-sectional view showing the method of manufacturing the wiring board according to the first embodiment.
- 6B is a cross-sectional view showing the method of manufacturing the wiring board according to the first embodiment;
- FIG. 6C is a cross-sectional view showing the method of manufacturing the wiring board according to the first embodiment.
- FIG. 6D is a cross-sectional view showing the method of manufacturing the wiring board according to the first embodiment.
- FIG. 6E is a cross-sectional view showing the method of manufacturing the wiring board according to the first embodiment.
- FIG. 7 is a plan view showing the image display device according to the first embodiment.
- 8A is a plan view (a view corresponding to FIG.
- FIG. 10A is a plan view showing a modification of the isolated pattern of the wiring board according to the second embodiment.
- FIG. 10B is a plan view showing a modification of the isolated pattern of the wiring board according to the second embodiment.
- FIG. 10C is a plan view showing a modification of the isolated pattern of the wiring board according to the second embodiment.
- FIG. 10D is a plan view showing a modification of the isolated pattern of the wiring board according to the second embodiment.
- FIGS. 1 to 7 are diagrams showing the first embodiment.
- the “X direction” is a direction perpendicular to the longitudinal direction of the mesh wiring portion, and is a direction perpendicular to the direction of length corresponding to the frequency band of the first direction wiring.
- the “Y direction” is a direction perpendicular to the X direction and parallel to the longitudinal direction of the mesh wiring portion, and is parallel to the length direction corresponding to the frequency band of the first direction wiring.
- the “Z direction” is a direction perpendicular to both the X direction and the Y direction and parallel to the thickness direction of the wiring board.
- the “surface” refers to a surface on the positive side in the Z direction and on which the wiring in the first direction is provided with respect to the substrate.
- the “back surface” is the surface on the negative side in the Z direction, which is the surface opposite to the surface on which the first direction wiring is provided with respect to the substrate.
- the mesh wiring unit 20 has a radio wave transmission/reception function (function as an antenna). functions).
- FIG. 1 to 5 are diagrams showing a wiring board according to this embodiment.
- the wiring board 10 is arranged, for example, on a display of an image display device.
- a wiring substrate 10 includes a transparent substrate 11, a mesh wiring portion 20 arranged on the substrate 11, and a dummy wiring portion 30 arranged on the substrate 11 around the mesh wiring portion 20. I have. Further, a power feeding section 40 is electrically connected to the mesh wiring section 20 .
- the substrate 11 has a substantially rectangular shape in plan view, with its longitudinal direction parallel to the Y direction and its short direction parallel to the X direction.
- the substrate 11 is transparent, has a substantially flat plate shape, and has a substantially uniform thickness as a whole.
- the length L1 of the substrate 11 in the longitudinal direction (Y direction) can be selected, for example, in the range of 10 mm or more and 200 mm or less, and the length L2 of the width direction (X direction) of the substrate 11 can be selected, for example, in the range of 3 mm or more and 100 mm or less. A range can be selected.
- the material of the substrate 11 may be any material that has transparency in the visible light region and electrical insulation. Although the material of the substrate 11 is polyethylene terephthalate in this embodiment, the material is not limited to this. As the material of the substrate 11, it is preferable to use an organic insulating material such as a polyester-based resin, an acrylic-based resin, a polycarbonate-based resin, a polyimide-based resin, a polyolefin-based resin, or a cellulose-based resin material.
- the polyester-based resin may be polyethylene terephthalate or the like.
- the acrylic resin may be polymethyl methacrylate or the like.
- the polyolefin resin may be a cycloolefin polymer or the like.
- the cellulosic resin may be triacetyl cellulose or the like.
- glass, ceramics, or the like can be appropriately selected depending on the application.
- the substrate 11 is illustrated as being composed of a single layer, it is not limited to this, and may have a structure in which a plurality of base materials or layers are laminated. Further, the substrate 11 may be film-like or plate-like. Therefore, the thickness of the substrate 11 is not particularly limited and can be appropriately selected according to the application. can be in the range of
- a plurality (three) of mesh wiring sections 20 are present on a substrate 11, and correspond to different frequency bands. That is, the plurality of mesh wiring portions 20 have different lengths (lengths in the Y direction) La, and each have a length corresponding to a specific frequency band. The length La of the mesh wiring portion 20 is longer as the corresponding frequency band is lower.
- the wiring board 10 When the wiring board 10 is arranged on, for example, a display 91 (see FIG. 7, which will be described later) of the image display device 90, the wiring board 10 of each mesh wiring section 20 may have a radio wave transmitting/receiving function.
- each mesh wiring unit 20 is compatible with any of a telephone antenna, WiFi antenna, 3G antenna, 4G antenna, LTE antenna, Bluetooth (registered trademark) antenna, NFC antenna, and the like. Also good.
- each mesh wiring part 20 has functions such as hovering (a function that allows the user to operate without directly touching the display), fingerprint authentication, a heater, and noise reduction. (Shield) and other functions may be achieved.
- Each mesh wiring portion 20 has a substantially rectangular shape in plan view.
- Each mesh wiring portion 20 has a longitudinal direction parallel to the Y direction and a lateral direction parallel to the X direction.
- the length L a in the longitudinal direction (Y direction) of each mesh wiring portion 20 can be selected, for example, within a range of 3 mm or more and 100 mm or less, and the width W a in the lateral direction (X direction) of each mesh wiring portion 20 can be set, for example, It can be selected in the range of 1 mm or more and 10 mm or less.
- the mesh wiring section 20 is composed of predetermined unit patterns 20A that are repeatedly arranged along the first direction (for example, the Y direction). Also, the unit patterns 20A are repeatedly arranged along a second direction (for example, the X direction) different from the first direction.
- the mesh wiring part 20 has metal wires formed in a lattice shape or a mesh shape, and has a uniform repeating pattern in the X direction and the Y direction.
- the mesh wiring section 20 is configured by repeating L-shaped unit patterns 20A (shaded portions in FIGS. 2A and 2B).
- the L-shaped unit pattern 20A is composed of a portion extending in the X direction (a portion of the second direction wiring 22 described later) and a portion extending in the Y direction (a portion of the first direction wiring 21 described later). .
- the pitch Pa of the unit pattern 20A in the X direction is equal to the pitch P1 of the first direction wirings 21, which will be described later. can be done.
- the pitch Pb of the unit patterns 20A in the Y direction is equal to the pitch P2 of the second direction wirings 22, which will be described later, and can be in the range of 0.01 mm or more and 1 mm or less, for example.
- each mesh wiring section 20 includes multiple wirings 21 and 22 .
- each mesh wiring portion 20 includes a plurality of first direction wirings (wirings) 21 functioning as antennas and a plurality of second direction wirings (wirings) connecting the plurality of first direction wirings 21. 22.
- the plurality of first directional wirings 21 and the plurality of second directional wirings 22 are integrated as a whole to form a regular lattice shape or mesh shape.
- Each first directional wiring 21 extends in a direction (Y direction) corresponding to the frequency band of the antenna
- each second directional wiring 22 extends in a direction (X direction) orthogonal to the first directional wiring 21. .
- the first directional wiring 21 has a length L a corresponding to a predetermined frequency band (the length of the mesh wiring section 20 described above), and thus mainly functions as an antenna.
- the second directional wiring 22 connects the first directional wirings 21 to each other, so that the first directional wiring 21 may be disconnected or the first directional wiring 21 and the power supply section 40 may not be electrically connected. It plays a role in suppressing troubles that occur.
- a plurality of openings 23 are formed in each mesh wiring portion 20 by being surrounded by mutually adjacent first directional wirings 21 and mutually adjacent second directional wirings 22 .
- the first directional wiring 21 and the second directional wiring 22 are arranged at regular intervals. That is, the plurality of first direction wirings 21 are arranged at regular intervals, and the pitch P 1 (see FIG. 2A) can be in the range of, for example, 0.01 mm or more and 1 mm or less.
- the plurality of second-direction wirings 22 are arranged at regular intervals, and the pitch P 2 (see FIG. 2A) can be in the range of, for example, 0.01 mm or more and 1 mm or less.
- each opening 23 has a substantially square shape in plan view, and the transparent substrate 11 is exposed from each opening 23 . Therefore, by increasing the area of each opening 23, the transparency of the wiring board 10 as a whole can be improved.
- the length L 3 (see FIG.
- each opening 23 can be in the range of, for example, 0.01 mm or more and 1 mm or less.
- the first direction wirings 21 and the second direction wirings 22 are orthogonal to each other, but are not limited to this, and may cross each other at an acute or obtuse angle.
- each opening 23 may have a shape such as a substantially rectangular shape in plan view.
- the shape of the openings 23 is preferably the same shape and the same size over the entire surface, but it is not necessary to make the shape uniform over the entire surface, such as by changing the shape depending on the location.
- each first direction wiring 21 has a substantially rectangular or square cross section perpendicular to its longitudinal direction (X direction cross section).
- the cross-sectional shape of the first directional wiring 21 is substantially uniform along the longitudinal direction (Y direction) of the first directional wiring 21 .
- the shape of the cross section (Y direction cross section) perpendicular to the longitudinal direction of each second direction wiring 22 is substantially rectangular or substantially square.
- (X-direction cross section) It is substantially the same as the shape.
- the cross-sectional shape of the second directional wiring 22 is substantially uniform along the longitudinal direction (X direction) of the second directional wiring 22 .
- the cross-sectional shapes of the first direction wiring 21 and the second direction wiring 22 may not necessarily be substantially rectangular or substantially square. It may have a narrow trapezoidal shape or a shape with curved side surfaces located on both sides in the width direction.
- the line width W 1 (length in the X direction, see FIG. 3) of the first directional wiring 21 and the line width W 2 (length in the Y direction, see FIG. 4) of the second directional wiring 22 are , is not particularly limited, and can be appropriately selected depending on the application.
- the line width W1 of the first direction wiring 21 can be selected in the range of 0.1 ⁇ m or more and 5.0 ⁇ m or less
- the line width W2 of the second direction wiring 22 can be selected in the range of 0.1 ⁇ m or more and 5.0 ⁇ m or less. You can choose.
- the first directional wiring 21 and the height H 2 (the length in the Z direction, see FIG. 4) of the second directional wiring 22 are not particularly limited. , can be appropriately selected according to the application, for example, it can be selected in the range of 0.1 ⁇ m or more and 5.0 ⁇ m or less.
- the material of the first direction wiring 21 and the second direction wiring 22 may be a metal material having conductivity.
- the material of the first direction wiring 21 and the second direction wiring 22 is copper in the present embodiment, the material is not limited to this.
- materials for the first direction wiring 21 and the second direction wiring 22 for example, metal materials (including alloys) such as gold, silver, copper, platinum, tin, aluminum, iron, and nickel can be used.
- the dummy wiring section 30 is provided so as to surround each mesh wiring section 20 .
- the dummy wiring portion 30 is formed so as to surround the entire circumferential region (the positive side in the X direction, the negative side in the X direction, and the positive side in the Y direction) of each mesh wiring portion 20 except for the power supply portion 40 side (the negative side in the Y direction). It is In this case, the dummy wiring portion 30 is arranged over substantially the entire area of the substrate 11 excluding the mesh wiring portion 20 and the power supply portion 40 . Unlike the mesh wiring section 20, the dummy wiring section 30 does not substantially function as an antenna.
- the dummy wiring portion 30 is composed of predetermined dummy unit patterns 30A (shaded portions in FIGS. 2A and 2B) that are repeatedly arranged.
- the dummy unit patterns 30A are L-shaped, and are repeatedly arranged along a first direction (eg, Y direction) and a second direction (eg, X direction).
- the dummy wiring portion 30 is composed of repeated dummy wirings 30a having a predetermined unit pattern. That is, the dummy wiring portion 30 includes a plurality of dummy wirings 30a having the same shape, and each dummy wiring 30a is connected to the mesh wiring portion 20 (the first direction wiring 21 and the second direction wiring 22) and the power feeding portion 40, respectively.
- each dummy wiring 30a has a first dummy wiring portion 31 extending in the Y direction and a second dummy wiring portion 32 extending in the X direction.
- the dummy unit pattern 30A has the same shape as the unit pattern 20A.
- the shape of the dummy wiring 30a is the same as the shape of the unit pattern 20A of the mesh wiring section 20 described above. Since the shape of the dummy unit pattern 30A is the same as the shape of the unit pattern 20A in this way, the difference between the mesh wiring portion 20 and the dummy wiring portion 30 can be made difficult to visually recognize. The wiring part 20 can be made difficult to see.
- a plurality of openings 33 are formed by being surrounded by the first dummy wiring section 31 adjacent to each other and the second dummy wiring section 32 adjacent to each other. Also, the first dummy wiring portion 31 and the second dummy wiring portion 32 are arranged at regular intervals. Since the plurality of first dummy wiring portions 31 and the plurality of second dummy wiring portions 32 are arranged at regular intervals in this way, the size of the openings 33 in the dummy wiring portion 30 is uniform. , the dummy wiring portion 30 can be made difficult to visually recognize with the naked eye.
- the pitch of the first dummy wiring portion 31 may be equal to the pitch P 1 of the first direction wiring 21 (see FIG. 2A), and the pitch of the second dummy wiring portion 32 may be equal to the pitch of the second direction wiring 22. It may be equal to the pitch P 2 (see FIG. 2A). Therefore, each opening 33 has a substantially square shape in plan view, and the transparent substrate 11 is exposed from each opening 33 . Therefore, by increasing the area of each opening 33, the transparency of the wiring board 10 as a whole can be improved. Although each first dummy wiring portion 31 and each second dummy wiring portion 32 are orthogonal to each other, they may cross each other at an acute or obtuse angle. Further, each opening 33 may have a shape such as a substantially rectangular shape in plan view. Further, the shape of the openings 33 is preferably the same shape and the same size over the entire surface, but may not be uniform over the entire surface, such as by changing the shape depending on the location.
- the mesh wiring section 20 and the dummy wiring section 30 are adjacent in the Y direction.
- a first dummy wiring portion 31 is formed on the extension of the first direction wiring 21 . Therefore, it is difficult to visually recognize the difference between the mesh wiring portion 20 and the dummy wiring portion 30 in the Y direction.
- the mesh wiring portion 20 and the dummy wiring portion 30 are adjacent to each other in the X direction.
- a second dummy wiring portion 32 is formed as an extension of the second direction wiring 22 near the boundary between the mesh wiring portion 20 and the dummy wiring portion 30 . Therefore, it is difficult to visually recognize the difference between the mesh wiring portion 20 and the dummy wiring portion 30 in the X direction.
- the interval G1 between the mesh wiring portion 20 and the dummy wiring portion 30 in the Y direction (first direction) is equal to the pitch P of the unit pattern 20A in the Y direction (first direction). 0.01 times or more and 0.2 times or less of b . Since the interval G1 is 0.01 times or more the pitch Pb, it is possible to effectively prevent the dummy wirings 30a of the dummy wirings 30 from affecting transmission and reception of radio waves in the mesh wirings 20. FIG . Therefore, it is possible to prevent the antenna performance from deteriorating. In addition, since the interval G1 is 0.2 times or less the pitch Pb , the difference between the mesh wiring portion 20 and the dummy wiring portion 30 in the Y direction can be made difficult to visually recognize.
- the first dummy wiring portion 31 of each dummy wiring 30a has a substantially rectangular or square cross section (X direction cross section) perpendicular to the longitudinal direction (Y direction).
- the second dummy wiring portion 32 of each dummy wiring 30a has a substantially rectangular or square cross section (Y direction cross section) perpendicular to the longitudinal direction (X direction).
- the cross-sectional shape of the first dummy wiring portion 31 is substantially the same as the cross-sectional shape of the first directional wiring 21
- the cross-sectional shape of the second dummy wiring portion 32 is substantially the same as the cross-sectional shape of the second directional wiring 22.
- the line width W 3 (the length in the X direction, see FIG. 5) of the first dummy wiring portion 31 is substantially the same as the line width W 1 of the first direction wiring 21, and the second dummy wiring
- the line width W 4 (the length in the Y direction, see FIG. 4) of the portion 32 is substantially the same as the line width W 2 of the second directional wiring 22 .
- the height H 3 (length in the Z direction, see FIG. 5) of the first dummy wiring portion 31 and the height H 4 (length in the Z direction, see FIG. 4) of the second dummy wiring portion 32 are also The height H1 of the first directional wiring 21 and the height H2 of the second directional wiring 22 are substantially the same.
- the same metal material as the material of the first direction wiring 21 and the material of the second direction wiring 22 can be used as the material of the dummy wiring 30a.
- the mesh wiring portion 20 and the dummy wiring portion 30 each have a predetermined aperture ratio.
- the aperture ratio of the mesh wiring portion 20 and the dummy wiring portion 30 can be, for example, in the range of 85% or more and 99.9% or less.
- the overall aperture ratio of the mesh wiring portion 20 and the dummy wiring portion 30 (the total aperture ratio of the mesh wiring portion 20 and the dummy wiring portion 30) can be, for example, in the range of 87% or more and less than 100%.
- the overall aperture ratio A3 of the wiring board 10 By setting the overall aperture ratio A3 of the wiring board 10 within this range, the conductivity and transparency of the wiring board 10 can be ensured.
- the aperture ratio refers to the ratio (%) of the area of the aperture region to the unit area of the predetermined region.
- the predetermined area is the mesh wiring portion 20 , the dummy wiring portion 30 , or the mesh wiring portion 20 and the dummy wiring portion 30 .
- the opening region is a region in which the substrate 11 is exposed without metal portions such as the first directional wiring 21, the second directional wiring 22, or the dummy wiring 30a.
- the power supply section 40 is electrically connected to the mesh wiring section 20 .
- the power supply portion 40 is made of a substantially rectangular conductive thin plate-like member.
- the longitudinal direction of the power supply portion 40 is parallel to the X direction, and the short direction of the power supply portion 40 is parallel to the Y direction.
- the power supply unit 40 is arranged at the longitudinal end of the substrate 11 (Y-direction minus side end).
- metal materials including alloys
- gold, silver, copper, platinum, tin, aluminum, iron, and nickel can be used as gold, silver, copper, platinum, tin, aluminum, iron, and nickel can be used.
- the power supply unit 40 is electrically connected to the wireless communication circuit 92 of the image display device 90 when the wiring board 10 is incorporated in the image display device 90 (see FIG. 7).
- the power supply section 40 is provided on the surface of the substrate 11 , the power supply section 40 is not limited to this, and part or all of the power supply section 40 may be positioned outside the peripheral edge of the substrate 11 .
- FIGS. 6A to 6E are cross-sectional views showing the method of manufacturing the wiring board according to this embodiment.
- a transparent substrate 11 is prepared.
- the mesh wiring section 20 includes a plurality of first directional wirings 21 and a plurality of second directional wirings 22 .
- the dummy wiring portion 30 includes a plurality of dummy wirings 30 a electrically independent from the first directional wirings 21 and the second directional wirings 22 .
- a metal foil 51 is laminated over substantially the entire surface of the substrate 11 .
- metal foil 51 may have a thickness of 0.1 ⁇ m or more and 5.0 ⁇ m or less.
- metal foil 51 may contain copper.
- a photocurable insulating resist 52 is supplied over substantially the entire surface of the metal foil 51 .
- the photocurable insulating resist 52 include organic resins such as acrylic resins and epoxy resins.
- an insulating layer 54 is formed by photolithography.
- the photocurable insulating resist 52 is patterned by photolithography to form an insulating layer 54 (resist pattern).
- the insulating layer 54 is formed so that the metal foil 51 corresponding to the first directional wiring 21, the second directional wiring 22 and the dummy wiring 30a is exposed.
- the metal foil 51 on the surface of the substrate 11 is removed.
- wet treatment is performed using ferric chloride, cupric chloride, strong acids such as sulfuric acid and hydrochloric acid, persulfate, hydrogen peroxide, aqueous solutions thereof, or a combination of the above.
- the metal foil 51 is etched so that the surface is exposed.
- the insulating layer 54 is removed.
- the insulating layer 54 on the metal foil 51 is removed by wet treatment using a permanganate solution, N-methyl-2-pyrrolidone, an acid or alkaline solution, or the like, or dry treatment using oxygen plasma. Remove.
- the wiring substrate 10 having the substrate 11 and the mesh wiring portion 20 and the dummy wiring portion 30 arranged on the substrate 11 is obtained.
- the mesh wiring portion 20 includes the first direction wiring 21 and the second direction wiring 22, and the dummy wiring portion 30 includes the dummy wiring 30a.
- the wiring board 10 is incorporated into an image display device 90 having a display 91.
- the wiring board 10 is arranged on the display 91 .
- Examples of such an image display device 90 include mobile terminal devices such as smartphones and tablets.
- the mesh wiring portion 20 of the wiring board 10 is electrically connected to the wireless communication circuit 92 of the image display device 90 via the power supply portion 40 . In this manner, radio waves of a predetermined frequency can be transmitted and received via the mesh wiring section 20, and communication can be performed using the image display device 90.
- the dummy wiring portion 30 is separated from the mesh wiring portion 20 and is electrically independent. Therefore, even if the dummy wiring portion 30 is provided, it does not affect transmission and reception of radio waves.
- wiring substrate 10 includes transparent substrate 11 and mesh wiring portion 20 disposed on substrate 11 and including a plurality of first direction wirings 21 and a plurality of second direction wirings 22. Therefore, the transparency of the wiring board 10 is ensured. Accordingly, when the wiring board 10 is placed on the display 91, the display 91 can be viewed through the opening 23 of the mesh wiring portion 20, so that the visibility of the display 91 is not hindered.
- a dummy wiring portion 30 including a plurality of dummy wirings 30 a electrically independent of the first direction wirings 21 and the second direction wirings 22 is arranged around the mesh wiring portion 20 .
- the mesh wiring section 20 is composed of predetermined unit patterns 20A that are repeatedly arranged along the Y direction.
- the interval G1 between the mesh wiring portion 20 and the dummy wiring portion 30 is 0.01 to 0.2 times the pitch Pb of the unit pattern 20A in the Y direction. In this way, by setting the interval G1 to be 0.01 times or more the pitch Pb , it is possible to effectively prevent the dummy wiring 30a of the dummy wiring section 30 from affecting transmission and reception of radio waves in the mesh wiring section 20.
- the boundary between the mesh wiring portion 20 and the dummy wiring portion 30 can be made unclear in the Y direction. Therefore, the mesh wiring portion 20 and the dummy wiring portion 30 can be made difficult to see on the surface of the display 91, and the user of the image display device 90 can hardly recognize the mesh wiring portion 20 and the dummy wiring portion 30 with the naked eye.
- the distance between the mesh wiring portion 20 and the dummy wiring portion 30 in order to suppress deterioration of antenna performance, it is preferable to increase the distance between the mesh wiring portion 20 and the dummy wiring portion 30 .
- the interval between the mesh wiring portion 20 and the dummy wiring portion 30 is increased, the boundary between the mesh wiring portion 20 and the dummy wiring portion 30 may become clear.
- the interval G1 between the mesh wiring portion 20 and the dummy wiring portion 30 in the Y direction is 0.01 times or more the pitch Pb of the unit pattern 20A in the Y direction. 0.2 times or less. As a result, it is possible to prevent deterioration of the antenna performance while ensuring the transparency of the wiring board 10 .
- the interval G2 between the mesh wiring portion 20 and the dummy wiring portion 30 is 0.01 times or more the pitch Pa of the unit pattern 20A in the X direction. less than twice. In this way, by setting the interval G2 to be 0.01 times or more the pitch Pa , it is possible to effectively prevent the dummy wiring 30a of the dummy wiring section 30 from affecting transmission and reception of radio waves in the mesh wiring section 20. can be suppressed to Therefore, it is possible to prevent the antenna performance from deteriorating.
- the interval G2 is 0.2 times or less the pitch Pa , the boundary between the mesh wiring portion 20 and the dummy wiring portion 30 can be made unclear in the X direction. Therefore, the mesh wiring portion 20 and the dummy wiring portion 30 can be made difficult to see on the surface of the display 91, and the user of the image display device 90 can hardly recognize the mesh wiring portion 20 and the dummy wiring portion 30 with the naked eye.
- the shape of the dummy unit pattern 30A is the same as the shape of the unit pattern 20A.
- the boundary between the mesh wiring portion 20 and the dummy wiring portion 30 can be further obscured, and the mesh wiring portion 20 and the dummy wiring portion 30 on the surface of the display 91 can be difficult to recognize with the naked eye.
- the present invention is not limited to this.
- the first directional wiring 21 and the second directional wiring 22 may be non-parallel to both the X direction and the Y direction, respectively.
- the first directional wiring 21 and the second directional wiring 22 intersect obliquely, and each opening 23 is formed in a diamond shape in plan view.
- the first direction wiring 21 and the second direction wiring 22 are non-parallel to both the X direction and the Y direction, respectively.
- first dummy wiring portions 31 of the dummy wiring portion 30 may extend parallel to the first direction wirings 21 respectively.
- the second dummy wiring portion 32 of the dummy wiring portion 30 may extend parallel to the second direction wiring 22 .
- the interval G1 between the mesh wiring portion 20 and the dummy wiring portion 30 in the Y direction is 0.01 to 0.2 times the pitch Pb of the unit pattern 20A in the Y direction. It's becoming In the X direction, the spacing G2 between the mesh wiring portion 20 and the dummy wiring portion 30 is 0.01 to 0.2 times the pitch Pa of the unit pattern 20A in the X direction. This can prevent the antenna performance from deteriorating. Also, the boundary between the mesh wiring portion 20 and the dummy wiring portion 30 can be made unclear. Therefore, the mesh wiring portion 20 and the dummy wiring portion 30 can be made difficult to see on the surface of the display 91, and the user of the image display device 90 can hardly recognize the mesh wiring portion 20 and the dummy wiring portion 30 with the naked eye.
- FIGS. 9A and 9B mainly differs from the first embodiment in that the dummy wiring portion 30 is composed of a plurality of mutually independent isolated patterns 30B.
- the same parts as in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
- the dummy wiring section 30 is composed of a plurality of mutually independent isolated patterns 30B.
- This isolated pattern 30B is composed of a dummy wiring 30a having a first dummy wiring portion 31 extending in the Y direction and a second dummy wiring portion 32 extending in the X direction.
- the opening 33 is formed by being surrounded by the mutually adjacent first dummy wiring portion 31 and the mutually adjacent second dummy wiring portion 32 in the isolated pattern 30B.
- two openings 33 are formed in the isolated pattern 30B.
- Each opening 33 has a substantially square shape in plan view.
- each opening 33 is arranged along the X direction or the Y direction.
- the openings 33 are arranged along the X direction.
- the openings 33 are arranged along the Y direction.
- the openings 33 of the isolated pattern 30B adjacent to the mesh wiring portion 20 in the Y direction may be arranged along the Y direction without being limited to this. Further, each opening 33 of the isolated pattern 30B adjacent to the mesh wiring portion 20 in the X direction may be arranged along the X direction.
- the shape of each isolated pattern 30B may be the same as each other. Also, the isolated patterns 30B may be arranged regularly or irregularly. Furthermore, in the isolated pattern 30B, one opening 33 may be formed, or three or more openings 33 may be formed.
- the isolated pattern 30B includes the dummy unit pattern 30A.
- the dummy unit pattern 30A has the same shape as the unit pattern 20A. Thereby, the boundary between the mesh wiring portion 20 and the dummy wiring portion 30 can be further obscured. Although not shown, the shape of the dummy unit pattern 30A and the shape of the unit pattern 20A may be different from each other.
- the length of the dummy wiring 30a of the isolated pattern 30B (hereinafter also referred to as length L 30B ) is equal to the length of the first direction wiring 21 and the second direction wiring 22 of the unit pattern 20A (hereinafter referred to as length L 30B). It is 4.0 times or less than L 20A ).
- the length L 20A of the first directional wiring 21 and the second directional wiring 22 of the unit pattern 20A is the length of the first directional wiring 21 of the unit pattern 20A and the second directional wiring of the unit pattern 20A. 22 length.
- L 21A L 21 +L 22 .
- the length L 30B of the dummy wiring 30a of the isolated pattern 30B is 4.0 times the length L 20A of the first direction wiring 21 and the second direction wiring 22 of the unit pattern 20A. It is below.
- the difference between the mesh wiring portion 20 and the dummy wiring portion 30 can be made difficult to visually recognize.
- the interval G3 between the isolated patterns 30B is 0.01 to 0.2 times the pitch Pb of the unit patterns 20A in the Y direction (first direction). be. Since the interval G3 is 0.01 times or more the pitch Pb , it is possible to suppress deterioration of the antenna performance. In addition, since the interval G3 is 0.2 times or less the pitch Pb , it becomes difficult to visually recognize the difference between the isolated patterns 30B in the Y direction.
- the interval G4 between the isolated patterns 30B is 0.01 to 0.2 times the pitch Pa of the unit patterns 20A in the X direction (second direction). is.
- the interval G4 is 0.01 times or more the pitch Pa , it is possible to suppress deterioration of the antenna performance. Further, since the interval G4 is 0.2 times or less the pitch Pa , it becomes difficult to visually recognize the difference between the isolated patterns 30B in the X direction.
- the wiring board 10 can be manufactured by the method shown in FIGS. 6A to 6E.
- the length L 30B of the dummy wiring 30a of the isolated pattern 30B is 4 times the length L 20A of the first directional wiring 21 and the second directional wiring 22 of the unit pattern 20A. .0 times or less.
- the interval G3 between the isolated patterns 30B is 0.01 to 0.2 times the pitch Pb of the unit patterns 20A in the Y direction (first direction). be. In this way, by setting the interval G3 to be 0.01 times or more the pitch Pb , it is possible to prevent the antenna performance from deteriorating. In addition, since the interval G3 is 0.2 times or less the pitch Pb , it becomes difficult to visually recognize the difference between the isolated patterns 30B in the Y direction.
- the interval G4 between the isolated patterns 30B in the X direction ( second direction) is 0.01 of the pitch Pa of the unit patterns 20A in the X direction (second direction). It is more than 0.2 times and less than 0.2 times. In this way, by setting the interval G4 to be 0.01 times or more the pitch Pa , it is possible to suppress deterioration in antenna performance. Further, since the interval G4 is 0.2 times or less the pitch Pa , it becomes difficult to visually recognize the difference between the isolated patterns 30B in the X direction.
- the isolated pattern 30B includes the dummy unit pattern 30A, and the dummy unit pattern 30A has the same shape as the unit pattern 20A.
- the boundary between the mesh wiring portion 20 and the dummy wiring portion 30 can be further obscured, and the mesh wiring portion 20 and the dummy wiring portion 30 on the surface of the display 91 can be difficult to recognize with the naked eye.
- the openings 33 of the isolated pattern 30B are arranged along the X direction or the Y direction, but the present invention is not limited to this.
- the openings 33 may be staggered in the X and Y directions.
- the present invention is not limited to this.
- the first dummy wiring portion 31 and the second dummy wiring portion 32 may be non-parallel to both the X direction and the Y direction.
- the first dummy wiring portion 31 and the second dummy wiring portion 32 may intersect obliquely, and each opening 33 may be formed in a diamond shape in plan view.
- each opening 33 of the isolated pattern 30B may be arranged along the X direction (or Y direction (not shown)), and as shown in FIG.
- the portions 33 may be staggered in the X direction and the Y direction.
- first directional wiring 21 of the mesh wiring portion 20 may extend parallel to or non-parallel to the first dummy wiring portion 31 .
- second direction wiring 22 of the mesh wiring section 20 may extend parallel to or non-parallel to the second dummy wiring portion 32 .
- the first dummy wiring portion 31 has a first portion 31a that is non-parallel to both the X direction and the Y direction, and a first portion 31a that is non-parallel to both the X direction and the Y direction. It may include a second portion 31b that is parallel and obliquely crosses the first portion 31a.
- Each opening 33 may be formed in a substantially regular hexagonal shape in plan view. In this case, the openings 33 may be staggered in the X direction and the Y direction, or, although not shown, the openings 33 may be arranged in the X direction or the Y direction. . Moreover, although not shown, the opening 33 may be formed in a polygonal shape such as a substantially equilateral triangular shape or a substantially pentagonal shape in plan view.
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Abstract
Description
まず、図1乃至図7により、第1の実施の形態について説明する。図1乃至図7は第1の実施の形態を示す図である。
図1乃至図5を参照して、本実施の形態による配線基板の構成について説明する。図1乃至図5は、本実施の形態による配線基板を示す図である。
次に、図6A乃至図6Eを参照して、本実施の形態による配線基板の製造方法について説明する。図6A乃至図6Eは、本実施の形態による配線基板の製造方法を示す断面図である。
次に、このような構成からなる配線基板の作用について述べる。
次に、図9Aおよび図9Bを参照して第2の実施の形態について説明する。図9Aおよび図9Bに示す第2の実施の形態は、主として、ダミー配線部30が、互いに独立した複数の孤立パターン30Bから構成されている点が第1の実施の形態と異なるものである。図9Aおよび図9Bにおいて、第1の実施の形態と同一部分には同一の符号を付して詳細な説明は省略する。
Claims (11)
- 配線基板であって、
透明性を有する基板と、
前記基板上に配置され、複数の配線を含むメッシュ配線部と、
前記メッシュ配線部の周囲に配置され、前記配線から電気的に独立した複数のダミー配線を含むダミー配線部と、を備え、
前記メッシュ配線部は、第1方向に沿って繰り返し配列された所定の単位パターンから構成され、
前記第1方向において、前記メッシュ配線部と前記ダミー配線部との間の間隔は、前記単位パターンの前記第1方向におけるピッチの0.01倍以上0.2倍以下である、配線基板。 - 前記単位パターンは、前記第1方向とは異なる第2方向に沿って繰り返し配列され、前記第2方向において、前記メッシュ配線部と前記ダミー配線部との間の間隔は、前記単位パターンの前記第2方向におけるピッチの0.01倍以上0.2倍以下である、請求項1に記載の配線基板。
- 前記ダミー配線部は、繰り返し配列された所定のダミー単位パターンから構成され、前記ダミー単位パターンの形状は、前記単位パターンの形状と等しい、請求項1または2に記載の配線基板。
- 配線基板であって、
透明性を有する基板と、
前記基板上に配置され、複数の配線を含むメッシュ配線部と、
前記メッシュ配線部の周囲に配置され、前記配線から電気的に独立した複数のダミー配線を含むダミー配線部と、を備え、
前記メッシュ配線部は、第1方向に沿って繰り返し配列された所定の単位パターンから構成され、
前記ダミー配線部は、互いに独立した複数の孤立パターンから構成され、
前記孤立パターンの前記ダミー配線の長さは、前記単位パターンの前記配線の長さの4.0倍以下であり、
前記第1方向において、前記孤立パターン同士の間の間隔は、前記単位パターンの前記第1方向におけるピッチの0.01倍以上0.2倍以下である、配線基板。 - 前記第1方向において、前記メッシュ配線部と前記ダミー配線部との間の間隔は、前記単位パターンの前記第1方向におけるピッチの0.01倍以上0.2倍以下である、請求項4に記載の配線基板。
- 前記単位パターンは、前記第1方向とは異なる第2方向に沿って繰り返し配列され、前記第2方向において、前記孤立パターン同士の間の間隔は、前記単位パターンの前記第2方向におけるピッチの0.01倍以上0.2倍以下である、請求項4乃至5のいずれか一項に記載の配線基板。
- 前記第2方向において、前記メッシュ配線部と前記ダミー配線部との間の間隔は、前記単位パターンの前記第2方向におけるピッチの0.01倍以上0.2倍以下である、請求項6に記載の配線基板。
- 前記孤立パターンは、ダミー単位パターンを含み、前記ダミー単位パターンの形状は、前記単位パターンの形状と等しい、請求項4乃至7のいずれか一項に記載の配線基板。
- 電波送受信機能を有する、請求項1乃至8のいずれか一項に記載の配線基板。
- 配線基板の製造方法であって、
透明性を有する基板を準備する工程と、
前記基板上に、複数の配線を含むメッシュ配線部と、前記メッシュ配線部の周囲に配置され、前記配線から電気的に独立した複数のダミー配線を含むダミー配線部とを形成する工程と、を備え、
前記メッシュ配線部は、第1方向に沿って繰り返し配列された所定の単位パターンから構成され、
前記第1方向において、前記メッシュ配線部と前記ダミー配線部との間の間隔は、前記単位パターンの前記第1方向におけるピッチの0.01倍以上0.2倍以下である、配線基板の製造方法。 - 配線基板の製造方法であって、
透明性を有する基板を準備する工程と、
前記基板上に、複数の配線を含むメッシュ配線部と、前記メッシュ配線部の周囲に配置され、前記配線から電気的に独立した複数のダミー配線を含むダミー配線部とを形成する工程と、を備え、
前記メッシュ配線部は、第1方向に沿って繰り返し配列された所定の単位パターンから構成され、
前記ダミー配線部は、互いに独立した孤立パターンから構成され、
前記孤立パターンの長さは、前記単位パターンの長さの4.0倍以下であり、
前記第1方向において、前記孤立パターン同士の間の間隔は、前記単位パターンの前記第1方向におけるピッチの0.01倍以上0.2倍以下である、配線基板の製造方法。
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EP22784665.6A EP4322330A1 (en) | 2021-04-09 | 2022-04-04 | Wiring board and method for manufacturing wiring board |
CN202280026883.6A CN117099262A (zh) | 2021-04-09 | 2022-04-04 | 布线基板和布线基板的制造方法 |
KR1020237038140A KR20230170014A (ko) | 2021-04-09 | 2022-04-04 | 배선 기판 및 배선 기판의 제조 방법 |
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2021
- 2021-04-09 JP JP2021066761A patent/JP2022161722A/ja active Pending
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2022
- 2022-04-04 KR KR1020237038140A patent/KR20230170014A/ko unknown
- 2022-04-04 EP EP22784665.6A patent/EP4322330A1/en active Pending
- 2022-04-04 WO PCT/JP2022/017051 patent/WO2022215683A1/ja active Application Filing
- 2022-04-04 CN CN202280026883.6A patent/CN117099262A/zh active Pending
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Patent Citations (6)
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JP2011066610A (ja) | 2009-09-16 | 2011-03-31 | Dainippon Printing Co Ltd | 透明アンテナ |
JP5636735B2 (ja) | 2009-09-24 | 2014-12-10 | 大日本印刷株式会社 | 透明アンテナ用エレメント及び透明アンテナ |
JP5695947B2 (ja) | 2010-03-25 | 2015-04-08 | ソニーモバイルコミュニケーションズ株式会社 | アンテナ装置および携帯機器 |
JP2018060345A (ja) * | 2016-10-05 | 2018-04-12 | 日本航空電子工業株式会社 | 電子デバイス及びタッチパネル |
JP2020036031A (ja) * | 2017-11-29 | 2020-03-05 | 大日本印刷株式会社 | 配線基板および配線基板の製造方法 |
KR20210034577A (ko) * | 2019-04-19 | 2021-03-30 | 동우 화인켐 주식회사 | 안테나 소자 및 이를 포함하는 디스플레이 장치 |
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JP2022161722A (ja) | 2022-10-21 |
TW202243560A (zh) | 2022-11-01 |
CN117099262A (zh) | 2023-11-21 |
EP4322330A1 (en) | 2024-02-14 |
KR20230170014A (ko) | 2023-12-18 |
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