WO2022244602A1 - 導電シート、タッチセンサ及びタッチセンサの製造方法 - Google Patents
導電シート、タッチセンサ及びタッチセンサの製造方法 Download PDFInfo
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- WO2022244602A1 WO2022244602A1 PCT/JP2022/018770 JP2022018770W WO2022244602A1 WO 2022244602 A1 WO2022244602 A1 WO 2022244602A1 JP 2022018770 W JP2022018770 W JP 2022018770W WO 2022244602 A1 WO2022244602 A1 WO 2022244602A1
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- metal
- thin
- wire
- bending line
- thin metal
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Classifications
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- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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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
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- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
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- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- H—ELECTRICITY
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- H05K1/03—Use of materials for the substrate
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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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- H05K3/06—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process
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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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/12—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns
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- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
-
- 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
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-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
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Definitions
- the present invention relates to a conductive sheet, a touch sensor, and a method for manufacturing a touch sensor, and more particularly to a conductive sheet including mesh-like thin metal wires, a touch sensor, and a method for manufacturing a touch sensor.
- a conductive sheet used for touch sensor electrodes, etc. a transparent base material on which mesh-like thin metal wires are formed has been used.
- a pattern shape of the mesh for example, a lattice shape in which polygons such as rhombuses and hexagons are laid out is generally used.
- a method of printing a conductive ink according to a pattern a method of patterning by etching a metal foil, and the like.
- the angle at which the thin metal wires intersect is an acute angle
- the area of the intersection of the thin metal wires becomes large due to reasons such as bleeding of the conductive ink at the acute-angled portion during printing or insufficient reach of the etchant at the acute-angled portion. There is a risk that the thin metal wire will be visible.
- An object of the present invention is to provide a conductive sheet, a touch sensor, and a method for manufacturing a touch sensor that suppress the visibility of thin metal wires.
- a first invention comprises: a transparent substrate; a plurality of first fine metal wires extending in a first direction; a first conductive pattern formed in a mesh shape by a plurality of second thin metal wires extending in the second direction so that the plurality of first openings are arranged continuously in the first direction and the second direction;
- the first thin metal wire and the second thin metal wire include a common first bending line formed at the intersection of each of the first thin metal wire and the second thin metal wire, and the first bending line is formed by the first thin metal wire and the second thin metal wire It is also a conductive sheet that connects the opposing first obtuse angle portions.
- a second invention is based on the first invention, wherein the first metal wire and the second metal wire extending from the first bend line to the next first bend line are the first metal side and the second metal side, respectively.
- a first metal side and a second metal side facing each other across the bending line are conductive sheets configured to have the same length.
- a third invention is the conductive sheet according to the first or second invention, wherein the first bending lines at both ends of the first metal side or the second metal side are parallel.
- the angle formed by the first thin metal wire and the second thin metal wire can be increased by connecting the first obtuse angle portions facing each other with the first bending line. Therefore, it is possible to accurately pattern the portions where the fine metal wires intersect, and to obtain a conductive sheet in which the fine metal wires are hardly visible.
- a fourth invention is, in the first to third inventions, provided on the other surface of the transparent substrate with a plurality of third metal thin wires extending in the first direction so as not to overlap with the first metal thin wires, and The plurality of second openings are continuously arranged in the first direction and the second direction by the plurality of fourth thin metal wires extending in the second direction so as to intersect the thin wires and not overlap the second thin metal wires.
- a second conductive pattern formed in a mesh shape is further provided, and the third fine metal wires and the fourth fine metal wires include common second bending lines formed at intersections thereof, and the second bending lines are It is a conductive sheet that connects the opposing second obtuse angle portions formed by the third metal thin wire and the fourth metal thin wire.
- the third metal wire and the fourth metal wire extending from the second bend line to the next second bend line are the third metal side and the fourth metal side, respectively
- the second A third metal side and a fourth metal side facing each other across the bending line are conductive sheets configured to have the same length.
- a sixth invention is the conductive sheet according to the fourth or fifth invention, wherein the third metal side or the second bending lines at both ends of the fourth metal side are parallel.
- a seventh invention is, in the fourth to sixth inventions, a conductive sheet in which the second bending line is positioned at the center of the first opening.
- the first conductive pattern and the second conductive pattern are not densely arranged, so that it is possible to prevent the fine metal wires from being visually recognized due to the difference in density of the fine metal wires.
- the second thin metal wire includes a first disconnection portion in which no metal thin wire is formed between the first bending line and the next first bending line, 3
- the thin metal wire includes a second disconnection portion in which no metal thin wire is formed between the second bending line and the next second bending line, and the first disconnection portion and the second disconnection portion do not intersect, the conductive sheet is.
- the second thin metal wire has the second metal side and the first disconnection portion alternately arranged
- the third thin metal wire has the third metal side and the second disconnection portion. are alternately arranged conductive sheets.
- the first conductive pattern and the second conductive pattern respectively constitute a plurality of first electrodes and a plurality of second electrodes
- the plurality of first electrodes and the plurality of second electrodes A conductive sheet having a first connection portion and a second connection portion formed at the ends of the conductive sheet, a terminal portion connected to the external wiring, and a lead connecting the first connection portion and the second connection portion to the terminal portion
- a touch sensor comprising a wiring.
- the first conductive pattern and the second conductive pattern in which the fine metal wires are hardly visible are used for the first electrodes and the second electrodes, so it is possible to obtain a touch sensor in which the fine metal wires are difficult to be seen.
- An eleventh invention comprises a step of sequentially forming a first blackened film layer, a metal film layer and a second blackened film layer on both surfaces of a transparent substrate, and forming a first conductive pattern on the first surface of the transparent substrate.
- a plurality of first openings are defined by a plurality of first thin metal wires extending in a first direction and a plurality of second thin metal wires extending in a second direction so as to cross the first thin metal wires.
- the second conductive pattern includes a plurality of third thin metal wires extending in the first direction so as not to overlap with the first thin metal wires, and The plurality of second openings are continuously arranged in the first direction and the second direction by the plurality of fourth thin metal wires extending in the second direction so as to intersect the three thin metal wires and not overlap the second thin metal wires.
- the first thin metal wire and the second thin metal wire include a common first bending line formed at the point where they intersect, and the first bending line is formed between the first thin metal wire and the second thin metal wire.
- the first obtuse angle portions formed by the two thin metal wires are connected to each other, the third thin metal wire and the fourth thin metal wire include a common second bent line formed at the intersection of each, The second bent line is a touch sensor manufacturing method that connects the opposing second obtuse angle portions formed by the third metal thin wire and the fourth metal thin wire.
- the present invention it is possible to provide a conductive sheet, a touch sensor, and a method for manufacturing a touch sensor in which thin metal wires are difficult to see.
- FIG. 1 is a schematic cross-sectional view of a conductive sheet 1 according to a first embodiment of the invention
- FIG. 1 is a schematic plan view of a conductive sheet 1 according to a first embodiment of the invention
- FIG. 3 is a partially enlarged cross-sectional view of the first thin metal wires 11 of the conductive sheet 1 according to the first embodiment of the present invention
- 1 is a partially enlarged plan view of a first conductive pattern 10 of a conductive sheet 1 according to a first embodiment of the present invention
- FIG. FIG. 4 is a schematic cross-sectional view of a conductive sheet 100 according to a second embodiment of the invention
- FIG. 10 is a partially enlarged plan view of the first conductive pattern 110 of the conductive sheet 100 according to the second embodiment of the present invention
- FIG. 5 is a partially enlarged plan view of a second conductive pattern 120 of the conductive sheet 100 according to the second embodiment of the present invention
- FIG. 4 is a schematic plan view of a conductive sheet 100 according to a second embodiment of the invention
- FIG. 8A is a schematic plan view of a conductive sheet 100A according to Modification A of the second embodiment
- FIG. 8B is a partially enlarged plan view of a first metal side 114A.
- FIG. 10 is a schematic plan view of a conductive sheet 100B according to Modification B of the second embodiment
- FIG. 10 is a schematic plan view of a conductive sheet 100C according to Modification C of the second embodiment
- FIG. 5 is a schematic plan view of a touch sensor 500 according to a third embodiment of the invention
- 13 is a partially enlarged plan view of a region K in FIG. 12 of the touch sensor 500 according to the third embodiment of the present invention
- FIG. 10 is a schematic plan view of a conductive sheet 100C according to Modification C of the second embodiment
- FIG. 5 is a schematic plan view of a touch sensor 500 according to a third embodiment of the invention
- 13 is a partially enlarged plan view of a region K in FIG. 12 of the touch sensor 500 according to the third embodiment of the present invention
- the conductive sheet 1 includes a transparent base material 3 and a first conductive pattern 10 formed on the first surface 3a of the transparent base material 3.
- the first conductive pattern 10 has a pattern shape as shown in FIG. 2 in plan view from the first surface 3a side.
- the first conductive pattern 10 extends in the first direction d1 and is arranged side by side in the second direction d2, and extends in the second direction d2 and is arranged side by side in the first direction d1. It includes a plurality of second thin metal wires 12 .
- the first fine metal wire 11 and the second fine metal wire 12 By intersecting the first fine metal wires 11 and the second fine metal wires 12, a plurality of first openings R are formed continuously in the first direction d1 and the second direction d2 on the first surface 3a of the transparent substrate 3. are placed.
- the first thin metal wire 11 and the second thin metal wire 12 include a common first bending line 13 formed at their intersection.
- the first fine metal wire 11 is formed by laminating a first blackened layer 11a, a metal layer 11b, and a second blackened layer 11c from the first surface 3a side of the transparent substrate 3 .
- the first blackened layer 11a and the second blackened layer 11c are layers for reducing the reflectance of the first fine metal wires 11 and suppressing glare and pattern visibility.
- the second fine metal wire 12 also has a three-layer structure of a first blackened layer, a metal layer, and a second blackened layer.
- the material of the transparent substrate 3 is not particularly limited as long as it is flexible.
- PP polystyrene
- EVA polyolefins such as cycloolefin polymer (COP) and cyclic olefin copolymer (COC)
- vinyl resin polycarbonate (PC)
- PC polyamide
- PI polyimide
- PMMA acrylic resin
- Resin films such as acetylcellulose (TAC), polyurethane, silicone, polyvinyl chloride, and polyvinyl fluoride can be used.
- the thickness of the transparent substrate 3 is 5-500 ⁇ m, preferably 20-100 ⁇ m.
- the transparent base material 3 may be a single-layer film, or may be a film in which multiple layers are laminated.
- the transparent substrate 3 may contain a retardation film in its composition.
- the material for the metal layer is not particularly limited, but gold, silver, copper, iron, nickel, chromium, aluminum, molybdenum, titanium, or alloys thereof can be used, for example.
- Metal oxides or metal nitrides such as copper, nickel, chromium, aluminum, molybdenum, and titanium can be used as materials for the first blackened layer and the second blackened layer.
- the line width of the first fine metal wire 11 and the second fine metal wire 12 is, for example, 1 to 10 ⁇ m, preferably 1 to 5 ⁇ m.
- the film thicknesses of the first thin metal wires 11 and the second thin metal wires 12 are, for example, 120 nm to 1.2 ⁇ m.
- the thicknesses of the first blackened layer and the second blackened layer are, for example, 10 to 100 nm, and the thickness of the metal layer is, for example, 100 nm to 1 ⁇ m.
- the aperture ratio of the first thin metal wires 11 and the second thin metal wires 12 is, for example, 90% or more, preferably 95% or more.
- FIG. 4 is a partially extracted and enlarged plan view of the first conductive pattern 10 when the conductive sheet 1 is observed from the first surface 3a side of the transparent substrate 3.
- FIG. The first thin metal wire 11 extending in the first direction d1 and the second thin metal wire 12 extending in the second direction d2 include a common first bending line 13 formed at the intersection.
- the first thin metal wire 11 and the second thin metal wire 12 share one first bending line 13 at their intersections.
- a first obtuse angle portion ⁇ is formed by the first thin metal wire 11 and the second thin metal wire 12 .
- the first bending line 13 is formed to connect the first obtuse angle portions ⁇ .
- the first metal side 14 is the thin metal wire extending from the first bending line 13 to the next first bending line 13 .
- the thin metal wires extending from the first bent line 13 to the next first bent line 13 are the second metal sides 15 .
- a first bending line 13 is connected to both ends of the first metal side 14 and the second metal side 15 .
- a first obtuse angle ⁇ is formed by the first metal side 14 and the second metal side 15 .
- the first obtuse angle portion ⁇ is the angle formed by the first metal side 14 and the second metal side 15 with the intersection point S as the center. .
- a region surrounded by the two first bending lines 13, the two first metal sides 14, and the two second metal sides 15 is the first opening R.
- the first openings R are arranged continuously in the first direction and the second direction, and spread over the first surface 3 a of the transparent base material 3 .
- Two first obtuse angle portions ⁇ are present in one first opening R, and a center line L is an imaginary line connecting the intersection points S so as to pass through the two first obtuse angle portions ⁇ .
- the lengths of the first metal side 14 and the first metal side 15 facing each other across the first bending line 13 are equal. That is, the lengths of the first metal side 14 and the second metal side 15 forming the first obtuse angle portion ⁇ are equal. Therefore, the lengths of the first metal sides 14 and the second metal sides 15 on the first surface 3a of the transparent substrate 3 are all equal.
- the two first metal sides 14 and the two second metal sides 15 forming the first opening R have the same length.
- the two first bending lines 13 connected to both ends of the first metal side 14 are parallel.
- the two first bending lines 13 connected to both ends of the second metal side 15 are parallel.
- Two first bending lines 13 forming one first opening R are parallel.
- Each first bending line 13 of the first conductive pattern 10 has the same length.
- a line segment connecting end points of the first metal side 14 and the second metal side 15 on the side opposite to the intersection point S is perpendicular to the center line L.
- the first bending line 13 connects the first openings R to each other and connects the first center lines L to each other by connecting the first obtuse angle portions ⁇ facing each other.
- the first bending line 13 is arranged on an extension line of the first center line L.
- the first opening R is a figure that is symmetrical about the center line L.
- the angles formed by the first metal side 14 and the second metal side 15 and the first bending line 13 are right angles or obtuse angles, respectively.
- the lengths of the first metal side 14 and the second metal side 15 can be set according to the application of the conductive sheet 1, the required resistance value, and the size of the transparent substrate 3. For example, the length is 300 to 1300 ⁇ m. can do.
- the length of the bending line 13 is preferably 8-20 ⁇ m. If the length of the bent line 13 is 8 ⁇ m or more, it is possible to prevent a phenomenon in which the area of the intersection portion increases due to the remaining metal to be removed due to reasons such as the etchant not reaching the patterning of the fine metal wire. If the thickness is 20 ⁇ m or less, it is possible to suppress the occurrence of moire due to interference with the black matrix of the display device, for example.
- a more preferable length of the bending line 13 is 8 to 14 ⁇ m.
- the obtuse angle ⁇ can be set to 90° or more and less than 180°.
- the conductive sheet 1 is formed by pattern printing a conductive ink on the transparent base material 3, or by forming a metal film including a blackened layer on the transparent base material 3 by a sputtering method or metal foil transfer, and patterning by exposure and etching. can be manufactured by the method of When patterning is performed by exposure/etching, a metal film including a blackened layer can be formed on both sides of the transparent substrate 3, and patterning can be performed on both sides at the same time.
- the first bending lines 13 connect the opposing first obtuse angle portions ⁇ . Therefore, compared to the case where the first metal thin wire 11 and the second metal thin wire 12 intersect without forming a bent line to form an acute angle, the first metal side 14 and the second metal side 15 and the first bent line 13 and can form larger angles. Therefore, it is possible to suppress the phenomenon that the etchant is not spread during the patterning of the thin metal wires, and the metal at the intersections is not etched according to the pattern and remains and the metal area at the intersections increases. Therefore, it is possible to obtain the conductive sheet 1 in which the thin metal wires are hardly visible at the intersections of the first thin metal wires 11 and the second thin metal wires 12 .
- the lengths of the first metal sides 14 and the second metal sides 15 forming the first opening R are equal, and the lengths of the first metal sides 14 and the second metal sides 15 are also equal.
- Fine metal wires are evenly arranged on one surface 3a. Therefore, it is possible to prevent the appearance of the pattern of the fine metal wires due to the difference between the locations where the fine metal wires are sparsely formed and the locations where the fine metal wires are densely formed.
- first bending lines 13 connected to both ends of the first metal side 14 or the second metal side 15 are parallel and have the same length. By doing so, all the first openings R have the same shape, so the design load of the first conductive pattern 10 can be further reduced. Further, first bending lines 13 each having the same length are formed on extension lines of the first center line L of the first opening R, and the first metal side 14 and the second metal side 15 and the bending lines 13 All the angles formed by and are right angles or obtuse angles. Since the metal wires do not form an acute angle at the intersections of the first metal wires 11 and the second metal wires 12, it is possible to more effectively suppress the phenomenon that the metal area at the intersections increases.
- a conductive sheet 100 includes a transparent base material 130, a first conductive pattern 110 formed on a first surface 130a of the transparent base material 130, and a transparent base material. and a second conductive pattern 120 formed on the second surface 130b of 130 .
- the first conductive pattern 110 and the second conductive pattern 120 have a pattern shape as shown in FIG. 8 in plan view from the first surface 130a side.
- the first conductive pattern 110 on the first surface 130a side is indicated by a solid line
- the second conductive pattern 120 on the second surface 130b side is indicated by a broken line.
- FIG. 6 is a partially extracted and enlarged plan view of the first conductive pattern 110 when observed from the first surface 130a side of the transparent substrate 130.
- FIG. The first thin metal wire 111 extending in the first direction d1 and the second thin metal wire 112 extending in the second direction d2 have a common first bent line 113 at their intersection.
- the first thin metal wire 111 and the second thin metal wire 112 share one first bending line 113 at their intersections.
- a first obtuse angle portion ⁇ 1 is formed by the first thin metal wire 111 and the second thin metal wire 112 .
- the first bending line 113 is formed to connect the first obtuse angle portions ⁇ 1.
- the thin metal wire extending from the first bending line 113 to the next first bending line 113 is the first metal side 114 .
- a thin metal wire extending from a first bent line 113 to the next first bent line 113 is a second metal side 115 .
- a first bending line 113 is connected to both ends of the first metal side 114 and the second metal side 115 .
- the first obtuse angle portion ⁇ 1 is formed by the first metal side 114 and the second metal side 115 .
- the first obtuse angle portion ⁇ 1 is an angle formed by the first metal side 114 and the second metal side 115 with the intersection point S1 as the center.
- a region surrounded by the two first bending lines 113, the two first metal sides 114, and the two second metal sides 115 is the first opening R1.
- the first openings R1 are arranged continuously in the first direction d1 and the second direction d2 and spread over the first surface 130a of the transparent substrate 130 .
- Two first obtuse angle portions ⁇ 1 exist in one first opening R1, and a virtual line connecting the first intersection points S1 so as to pass through the two first obtuse angle portions ⁇ 1 is the first center line L1. .
- the lengths of the first metal side 114 and the second metal side 115 facing each other across the first bending line 113 are equal.
- the two first metal sides 114 and the two second metal sides 115 forming the first opening R1 have the same length.
- the two first bending lines 113 connected to both ends of the first metal side 114 are parallel, and the two first bending lines 113 connected to both ends of the second metal side 115 are parallel.
- Two first bending lines 113 forming one first opening R1 are parallel.
- a line segment connecting end points of the first metal side 114 and the second metal side 115 on the side opposite to the intersection point S1 is perpendicular to the first center line L1.
- the first bending line 113 connects the first center lines L1 and is arranged on an extension line of the first center line L1.
- the first opening R1 is a figure that is symmetrical about the first center line L1.
- the angles formed by the first metal side 114 and the second metal side 115 and the first bending line 113 are right
- FIG. 7 is a partially extracted and enlarged plan view of the second conductive pattern 120 when the conductive sheet 100 is observed from the first surface 130a side of the transparent base material 130.
- the second conductive pattern 120 includes a plurality of third thin metal wires 121 extending in the first direction d1 and arranged side by side in the second direction d2, and a plurality of thin metal wires 121 extending in the second direction d2 and arranged side by side in the first direction d1. It includes a plurality of fourth thin metal wires 122 . By intersecting the third metal wires 121 and the fourth metal wires 122, a plurality of second openings R2 are formed continuously in the first direction d1 and the second direction d2 on the second surface 130b of the transparent substrate 130. are placed.
- the third thin metal wire 121 extending in the first direction d1 and the fourth thin metal wire 122 extending in the second direction d2 have a common second bent line 123 at the intersection thereof.
- the third thin metal wire 121 and the fourth thin metal wire 122 share one second bending line 123 at their intersections.
- a second obtuse angle portion ⁇ 2 is formed by the third metal wire 121 and the fourth metal wire 122 .
- the second bending line 123 is formed to connect the second obtuse angle portions ⁇ 2.
- the metal thin wire extending from the second bending line 123 to the next second bending line 123 is the third metal side 124 .
- a metal thin wire extending from a second bent line 123 to the next second bent line 123 is a fourth metal side 125 .
- a second bending line 123 is connected to both ends of the third metal side 124 and the fourth metal side 125 .
- a second obtuse angle portion ⁇ 2 is formed by the third metal side 124 and the fourth metal side 125 .
- the second obtuse angle portion ⁇ 2 is an angle formed by the third metal side 124 and the fourth metal side 125 with the intersection point S2 as the center.
- a region surrounded by the two second bending lines 123, the two third metal sides 124, and the two fourth metal sides 125 is the second opening R2.
- the second openings R2 are arranged continuously in the first direction and the second direction, and are spread over the second surface 130b of the transparent substrate 130.
- Two second obtuse angle portions ⁇ 2 exist in one second opening R2, and a virtual line connecting the intersection point S2 passing through the two second obtuse angle portions ⁇ 2 is the second center line L2.
- the lengths of the third metal side 124 and the fourth metal side 125 facing each other across the first bending line 123 are equal.
- the two third metal sides 124 and the two fourth metal sides 125 forming the second opening R2 have the same length.
- the two second bending lines 123 connected to both ends of the third metal side 124 are parallel, and the two second bending lines 123 connected to both ends of the fourth metal side 125 are parallel.
- Two second bending lines 123 forming one second opening R2 are parallel.
- a line segment connecting end points of the third metal side 124 and the fourth metal side 125 on the side opposite to the intersection point S2 is perpendicular to the second center line L2.
- the second bending line 123 connects the second center lines L2 and is arranged on an extension line of the second center line L2.
- the second opening R2 is a figure that is symmetrical about the second center line L2.
- the angles formed by the third metal side 124 and the fourth metal side 125 and the second bending line 123 are right
- the first metal side 114 and second metal side 115 and the third metal side 124 and fourth metal side 125 have the same length.
- the lengths of the first bending line 113 and the second bending line 123 are also equal.
- the first obtuse angle portion ⁇ 1 and the second obtuse angle portion ⁇ 2 are also equal in size. Therefore, the opening areas of the first opening R1 and the second opening R2 are equal.
- the length of the metal side and the bent line, and the angle of the obtuse angle can be set in the same manner as in the first embodiment.
- a plurality of third thin metal wires 121 forming the second conductive pattern 120 are arranged side by side in the second direction d2 so as not to overlap with the first thin metal wires 111 .
- the fourth thin metal wires 122 are arranged side by side in the first direction d1 so as not to overlap the second thin metal wires 112 .
- Both the first thin metal wire 111 and the third thin metal wire 121 extend in the first direction d1.
- Both the second thin metal wire 112 and the fourth thin metal wire 122 extend in the second direction d2.
- the first conductive pattern 110 and the second conductive pattern 120 are arranged such that the second bending line 123 of the second conductive pattern 120 is positioned at the center of the first opening R1 of the first conductive pattern 110.
- the second bending line 123 located at the center of the first opening R1 is arranged at the center of the first center line L1 of the first opening R1 so as to overlap the first center line L1.
- the first bending line 113 is also the same.
- the first bending line 113 of the first conductive pattern 110 is arranged to be positioned at the center of the second opening R2 of the second conductive pattern 120 .
- the first bending line 113 positioned at the center of the second opening R2 is arranged at the center of the second center line L2 of the second opening R2 so as to overlap the second center line L2.
- the second bending lines 123 connect the opposing second obtuse angle portions ⁇ 2. Therefore, the angle between the third metal side 124 and the fourth metal side 125 and the second bending line 123 is larger than when the third metal wire 121 and the fourth metal wire 122 intersect without forming a bending line. can be formed. Therefore, it is possible to suppress the phenomenon that the etchant is not spread during the patterning of the thin metal wires, and the metal at the intersections is not etched according to the pattern and remains and the area of the metal at the intersections is increased. Therefore, it is possible to form a conductive sheet in which the crossing points of the thin metal wires are difficult to see not only on the first surface 130a of the transparent substrate 130 but also on the second surface 130b.
- the lengths of the first and second metal sides 114 and 115 are equal to those of the third and fourth metal sides 124 and 125, and the lengths of the first and second bending lines 113 and 123 are equal. , the opening areas of the first opening R1 and the second opening R2 are equal. Therefore, since the same conductive pattern can be used on both sides of the transparent substrate 130, the design load of the conductive pattern can be reduced.
- the first conductive pattern 110 and the second conductive pattern are arranged such that the second bending line 123 is positioned at the center of the first opening R1, in other words, the first bending line 113 is positioned at the center of the second opening R2. Since the metal wires 120 are arranged, when viewed from the side of the first surface 130a of the transparent base material 130, the thin metal wires are evenly arranged. Therefore, it is possible to prevent the pattern of the fine metal wires from being seen due to the difference in density of the fine metal wires.
- the configuration of the metal sides is not limited to this. Modifications A to C will be described with reference to FIGS. 9 to 11 . 9 to 11, the first conductive pattern on the first surface side of the transparent substrate is indicated by solid lines, and the second conductive pattern on the second surface side is indicated by broken lines. Here, the description will focus on the differences from the second embodiment.
- the conductive sheet 100A includes a transparent substrate, a first conductive pattern 110A formed on the first surface of the transparent substrate, and a second conductive pattern 120A formed on the second surface of the transparent substrate.
- the first conductive pattern 110A and the second conductive pattern 120A have a pattern shape as shown in FIG. 9A in plan view from the first surface side.
- the metal sides are configured in a wavy line shape in which arcs are continuously formed so that peaks and valleys are alternately formed.
- one metal side has a shape in which four circular arcs are continued so that peaks and valleys alternate.
- the length of the wavy lines of the first metal side 114A and the second metal side 115A can be expressed as two cycles. The same applies to the third metal side 124A and the fourth metal side 125A.
- the light beam caused by the diffraction of light incident from a point light source such as sunlight by the fine metal wires can be prevented. By suppressing it, glare can be suppressed.
- a straight line (chord length) is drawn from the start point to the end point of one arc on the metal side, and the height from the straight line to the top of the arc is h.
- the relationship is preferably 0.07 ⁇ h/r ⁇ 0.4. When h/r is 0.4 or less, the resistance value of the fine metal wire does not increase too much, and a favorable response speed can be maintained.
- the conductive sheet 100B includes a transparent substrate, a first conductive pattern 110B formed on the first surface of the transparent substrate, and a second conductive pattern 120B formed on the second surface of the transparent substrate.
- the first conductive pattern 110B and the second conductive pattern 120B have a pattern shape as shown in FIG. 10 in plan view from the first surface side.
- the first conductive pattern 110B includes a plurality of first fine metal wires 111B and a plurality of second fine metal wires 112B.
- the first thin metal wire 111B and the second thin metal wire 112B have a common first bending line 113B at their intersection.
- the first thin metal wires 111B the thin metal wires extending from the first bent line 113B to the next first bent line 113B are the first metal sides 114B.
- the second thin metal wire 112B is a thin metal wire extending from the first bending line 113B to the next first bending line 113B, and the second metal side 115B extends from the first bending line 113B to the next first bending line 113B. and a first disconnection portion 116B in which no thin metal wire is formed.
- the second metal sides 115B and the first disconnection portions 116B are alternately formed.
- the second conductive pattern 120B includes a plurality of third thin metal wires 121B and a plurality of fourth thin metal wires 122B.
- the third thin metal wire 121B and the fourth thin metal wire 122B have a common second bent line 123B at the intersection thereof.
- the third thin metal wire 121B includes a third metal side 124B, which is a thin metal wire extending from a second bending line 123B to the next second bending line 123B, and a metal wire between the second bending line 123B and the next second bending line 123B. and a second disconnection portion 126B where no thin wire is formed.
- the third metal sides 124B and the second disconnection portions 126B are alternately formed.
- the fourth thin metal wire 122B includes a fourth metal side 125B extending from the second bent line 123B to the next second bent line 123B.
- the first disconnection portion 116B and the second disconnection portion 126B do not intersect.
- the conductive sheet 100B according to Modification B by forming the first wire breakage portion 116B and the second wire breakage portion 126B, it is possible to change the pattern without unevenness in density of the fine metal wires. Therefore, in addition to preventing the visibility of the intersections of the fine metal wires, it also prevents the pattern from being seen due to the difference in density of the fine metal wires. Moire can be suppressed.
- the conductive sheet 100C includes a transparent substrate, a first conductive pattern 110C formed on the first surface of the transparent substrate, and a second conductive pattern 120C formed on the second surface of the transparent substrate.
- the first conductive pattern 110C and the second conductive pattern 120C have a pattern shape as shown in FIG. 11 in plan view from the first surface side.
- the metal sides are composed of wavy lines similar to Modification A.
- one metal side has a shape in which four circular arcs are continued so that peaks and valleys alternate. Assuming that a set of circular arc peaks and valleys is one period, the length of the wavy lines of the first metal side 114C and the second metal side 115C can be expressed as two periods. The same applies to the second conductive pattern 120C. Further, a disconnection portion is formed in the same manner as in Modification B.
- the second thin metal wire 112C includes second metal sides 115C and first disconnection portions 116C, and the second metal sides 115C and the first disconnection portions 116C are alternately formed.
- the third thin metal wire 121C includes third metal sides 124C and second disconnection portions 126C, and the third metal sides 124C and the second disconnection portions 126C are alternately formed.
- the metal sides are made into wavy lines to suppress the rays of light, and by forming the disconnection portions, it is possible to change the pattern without uneven density of the metal fine lines. Therefore, it is possible to obtain a conductive sheet that can prevent the intersection points of the fine metal wires from being visually recognized, suppress the appearance of the pattern of the fine metal wires and the occurrence of moire, and further suppress the glare caused by the rays of light.
- a touch sensor 500 includes a transparent base material 600, a plurality of first electrodes 700 formed on a first surface of the transparent base material 600, and a plurality of second electrodes 700 formed on the first surface of the transparent base material 600.
- a first connection portion 710 formed at each end of one electrode 700, a first terminal portion 720 connected to an external wiring, and a first wiring connecting the first connection portion 710 and the first terminal portion 720. and wiring 730 .
- the touch sensor 500 includes a plurality of second electrodes 800 formed on the second surface of the transparent base material 600, second connection portions 810 formed at ends of the plurality of second electrodes 800, and external wiring.
- the electrodes and the like formed on the first surface of the transparent substrate 600 are indicated by solid lines, and the electrodes and the like formed on the second surface are indicated by broken lines.
- the first surface of the transparent base material 600 is divided into an operation area V1 and a peripheral area V2.
- the operation area V1 is an area of the touch sensor 500 where the user performs an input operation
- the peripheral area V2 is an area covered with a frame-shaped decorative layer of the cover base material after assembly.
- a plurality of first electrodes 700 and a first dummy portion 740 are provided in the operation region V1 of the first surface of the transparent base material 600, and a first connection portion 710, a first terminal portion 720 and a first routing wiring are provided in the peripheral region V2. 730 are formed respectively.
- a plurality of first electrodes 700 are formed in the operation area V1.
- the plurality of first electrodes 700 are band-shaped, and are arranged on the first surface of the transparent base material 600 so as to extend in the y-axis direction and be arranged in four rows in the x-axis direction.
- the plurality of first electrodes 700 are composed of the first conductive pattern 110 described in the second embodiment. These plurality of first electrodes 700 constitute the electrodes of the touch sensor.
- the size of the plurality of first electrodes 700 is not particularly limited because it is determined by the size and resolution of the operation area V1. If A is the length of a line segment connecting the constituent first bent lines 113 and orthogonal to L1, W is the width of the first electrode 700, and X is the width of the first dummy portion 740, W/A is 2 or more. is preferably an integer of In this way, even if one of the fine metal wires is broken, the electrode continuity can be maintained and the operation of the touch sensor can be maintained. Furthermore, it is preferable that the width W of each of the plurality of first electrodes 700 is the same, W/A is an integer of 2 or more, and X/A is an integer of 0 or more. In this way, since the area of the fine metal wire included in one electrode is constant, it is possible to obtain a touch sensor that operates satisfactorily without variations in the resistance value of each electrode.
- the first dummy portion 740 is formed in a region of the operation region V1 where the plurality of first electrodes 700 are not formed.
- the first electrodes 700 and the first dummy portions 740 are alternately arranged.
- the first dummy portion 740 is composed of the first conductive pattern 110 described in the second embodiment. Referring to FIG. 13, enlarging the region K in FIG. 12, the first electrode 700 and the first dummy portion 740 are disconnected by the first boundary portion 750 so as not to be electrically connected.
- the first boundary portion 750 is formed by partly breaking the thin metal wire that constitutes the first electrode 700 , and the first electrode 700 and the first dummy portion 740 are separated by the first boundary portion 750 .
- a first boundary portion 750 is formed by disconnecting all thin metal wires on the boundary line between the first electrode 700 and the first dummy portion 740 .
- a first boundary 750 is formed in the y-direction.
- the width of the first boundary portion 750 is preferably 1 to 20 ⁇ m. By setting the width of the disconnection of the first boundary portion 750 within this range, it is possible to prevent the boundary line between the first electrode and the first dummy portion from being seen due to the presence or absence of the thin metal wire.
- the disconnection forming the first boundary portion 750 be positioned at the midpoint between the first metal side and the second metal side.
- the first connecting portion 710 is for connecting the first electrode 700 and the first routing wiring 730 .
- the first connection portion 710 can collectively connect the first conductive patterns 110 forming the first electrode 700 to the first routing wiring 730 .
- the first connection portion 710 is rectangular and is formed at one longitudinal end of the strip-shaped first electrode 700 .
- the first connection part 710 is formed in the peripheral region V2 so as to partially overlap the first conductive pattern 110 forming the first electrode 700 .
- the first electrode 700 extends to the boundary line of the operation area V1, and one side of the rectangle of the first connection portion 710 overlaps the boundary line between the operation area V1 and the peripheral area V2.
- the width of the first connection portion 710 is equal to the width of the first electrode 700 .
- the first connection portion 710 is a laminated film in which the first blackened layer, the metal layer, and the second blackened layer are laminated in this order from the transparent substrate 600 side. consists of
- the first terminal portion 720 is for connecting external wiring such as a flexible wiring board and the touch sensor 500 and is formed near the outer edge of the transparent base material 600 .
- the first lead-out wiring 730 is for connecting the first electrode 700 and the first terminal portion 720 , and is bent in the middle so as to gather near the center of the outer edge of the transparent base material 600 so as to connect to the first terminal portion 720 . It is connected.
- the first terminal portion 720 and the first routing wiring 730 are composed of a first blackened layer, a metal layer, and a second blackened layer from the transparent substrate 600 side, like the first thin metal wires 11 and the second thin metal wires 12 . stacked in order.
- a plurality of second electrodes 800 and a second dummy portion 840 are provided in the operation region V1 on the second surface of the transparent base material 600, and a second connection portion 810, a second terminal portion 820 and a second terminal portion 820 are provided in the peripheral region V2.
- a routing wiring 830 is formed respectively.
- the plurality of second electrodes 800 are arranged on the second surface of the transparent base material 600 so as to extend in the x-axis direction and to line up five in the y-axis direction.
- the second connection portion 810 is formed at one longitudinal end of the plurality of strip-shaped second electrodes 800 .
- the plurality of second electrodes 800 are composed of the second conductive pattern 120 described in the second embodiment. These multiple second electrodes 800 constitute the electrodes of the touch sensor.
- the first terminal portion 720 and the second terminal portion 820 formed on both sides of the transparent substrate 600 are connected to a flexible printed circuit board (not shown).
- the flexible printed circuit board is connected to a control unit that realizes capacitive touch detection.
- the control unit detects the current that flows according to the change in the capacitance generated in the first electrode 700 and the second electrode 800, thereby performing a touch operation by the user. and touch position can be detected.
- a method for manufacturing the touch sensor 500 will be described. First, a first blackened film layer, a metal film layer, and a second blackened film layer are formed in this order on both surfaces of the transparent substrate 600 by sputtering or metal foil transfer. Furthermore, a resist layer is formed on the second blackening film layer, and the resist layer is patterned by exposure and development using a pattern mask. After that, using the patterned resist layer as an etching mask, the first blackened film layer, the metal film layer, and the second blackened film layer are etched, so that conductive patterns are formed on both sides of the transparent substrate 600. An electrode, a dummy portion, a connection portion, a terminal portion, and a routing wiring are formed at the same time.
- the first electrode 700 and the second electrode 800 are configured by the first conductive pattern and the second conductive pattern according to the second embodiment, respectively. It is possible to obtain a touch sensor with a good appearance in which portions are hardly visible.
- the operation area V1 since dummy portions are formed in places where electrodes are not formed, it is possible to suppress the bone-visual phenomenon in which the electrode pattern is observed by the operator due to the presence or absence of the electrodes. . Since the dummy portion is composed of the first conductive pattern and the second conductive pattern according to the second embodiment as well as the electrodes, it is possible to suppress the pattern visibility of the intersections of the thin metal wires in both the dummy portion and the electrodes. Therefore, the appearance of the operation area V1 of the touch sensor 500 can be improved.
- electrodes, dummy portions, connection portions, terminal portions, and lead-out wiring can be formed on both sides of the transparent base material 600 at the same time, which complicates the manufacturing process. can be prevented.
- the lengths of the first metal side and the second metal side are equal in the above embodiment, the lengths of the first metal side and the second metal side may be different.
- the sizes of the openings may be different due to the different lengths of the first metal side and the second metal side.
- the lengths of the first metal side and the second metal side are preferably set so that one side is 1 to 2 times longer than the other side. The same applies to the third metal side and the fourth metal side.
- the lengths of the first metal sides adjacent to each other across the bending line may be different.
- one side may be set to be 1 to 2 times the size of the other side. The same applies to the second metal side to the fourth metal side.
- first bending line and the second bending line are all equal in the above embodiment, these lengths may be different.
- the lengths of the first bending lines or the lengths of the second bending lines may be different.
- the bending lines connected to both ends of the metal sides are parallel, but these bending lines may not be parallel.
- the first bending line 13 is formed on the extension line of L1, but may be inclined in the d1 direction or the d2 direction. Furthermore, the first bending line 13 may be curved. At that time, in order to avoid an increase in the metal area at the intersection of the thin metal wires due to the non-arrival of the etchant, the angle formed by the first bent line 13 and the first metal side 14 or the second metal side 15 should be 90° or more. Preferably. The same applies to other embodiments.
- the bent line is arranged at the center of the opening when the first conductive pattern and the second conductive pattern overlap. is not limited to this.
- the metal sides forming the first conductive pattern and the metal sides forming the second conductive pattern intersect.
- the intersecting metal sides are divided at a ratio of 1:1 to 2:1 by the other metal side. It is preferable to intersect as
- the fine metal wires are laminated in the order of the first blackened layer, the metal layer, and the second blackened layer, but the laminated structure of the fine metal wires is not limited to this.
- the laminated structure of the fine metal wires is not limited to this.
- a blackened layer may be formed.
- a configuration may be adopted in which the metal layer is entirely covered with a blackened layer.
- the second metal sides and the first disconnection portions are alternately formed, and the third metal sides and the second disconnection portions are alternately formed.
- the position of the disconnection portion is not limited to this.
- the disconnection portion may be formed so that the first disconnection portion and the second disconnection portion do not cross each other.
- the metal sides are composed of straight lines or wavy lines, but may be of other shapes.
- zigzag lines or curved lines can be used.
- the shape of the electrodes is not limited to this.
- a shape in which rhombic shapes are connected so as to connect their vertexes, or a comb-tooth shape can be used.
- the number of electrodes, the position of the wiring, and the position of the terminal portion are not particularly limited.
- the dummy portion is composed of the conductive pattern according to the second embodiment, but the metal fine line pattern of the dummy portion is not limited to this. It is preferable that the dummy portion is formed in a fine metal wire pattern that can suppress the visibility of the crossing points of the fine metal wires.
- electrodes are formed on both sides of the transparent substrate 600 of the touch sensor 500, but the configuration of the touch sensor is not limited to this.
- Two transparent substrates each having an electrode formed on one surface thereof may be bonded together so that the other surfaces of the transparent substrates face each other, or they may be bonded together via an adhesive layer such that the electrode-formed surfaces face each other. good too.
- the electrode-formed surface of one transparent substrate may be laminated so that the electrode-unformed surface of the other transparent substrate is overlapped.
- the connecting portion is formed at one end of the electrode, but the connecting portion may be formed at both longitudinal ends of the electrode.
- the second connection part 810 is formed on the left end of the second electrode 800
- the second connection part 810 may be formed on the right end of the second electrode 800 .
- a second terminal portion 820 is also formed on the right side of the first terminal portion 720
- each second routing wiring 830 is connected to the second terminal portion 820 .
- the position of the terminal portion and the layout of the routing wiring are not particularly limited.
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Abstract
Description
<第1実施形態>
図4は、導電シート1を透明基材3の第1面3a側から観察した場合の、第1導電パターン10の一部を部分的に抜き出して拡大した平面図である。第1方向d1に延びる第1金属細線11と第2方向d2に延びる第2金属細線12とは、各々が交差する箇所に形成された共通の第1屈曲線13を含む。第1金属細線11と第2金属細線12とは、各々が交差する箇所において、1本の第1屈曲線13を共有している。第1金属細線11と第2金属細線12によって第1鈍角部θが形成される。第1屈曲線13は、第1鈍角部θ同士を接続するように形成されている。
<第2実施形態>
図6は、透明基材130の第1面130a側から観察した場合の、第1導電パターン110の一部を部分的に抜き出して拡大した平面図である。第1方向d1に延びる第1金属細線111と第2方向d2に延びる第2金属細線112とは、各々が交差する箇所に共通の第1屈曲線113が形成されている。第1金属細線111と第2金属細線112とは、各々が交差する箇所において、1本の第1屈曲線113を共有している。第1金属細線111と第2金属細線112によって第1鈍角部θ1が形成される。第1屈曲線113は、第1鈍角部θ1同士を接続するように形成されている。
第2導電パターン120を構成する第3金属細線121は、第1金属細線111と重ならないように第2方向d2に複数並んで配置される。同様に、第4金属細線122は、第2金属細線112と重ならないように、第1方向d1に複数並んで配置される。第1金属細線111と第3金属細線121は共に第1方向d1に延びている。第2金属細線112と第4金属細線122は共に第2方向d2に延びている。
図9を参照して、変形例Aにかかる導電シート100Aを説明する。
導電シート100Aは、透明基材と、透明基材第1面に形成された第1導電パターン110Aと、透明基材第2面に形成された第2導電パターン120Aとを備える。第1導電パターン110A及び第2導電パターン120Aは、第1面側からの平面視において、図9(a)のようなパターン形状である。
図10を参照して、変形例Bにかかる導電シート100Bを説明する。
導電シート100Bは、透明基材と、透明基材第1面に形成された第1導電パターン110Bと、透明基材第2面に形成された第2導電パターン120Bとを備える。第1導電パターン110B及び第2導電パターン120Bは、第1面側からの平面視において、図10のようなパターン形状である。
図11を参照して、変形例Cにかかる導電シート100Cを説明する。
導電シート100Cは、透明基材と、透明基材第1面に形成された第1導電パターン110Cと、透明基材第2面に形成された第2導電パターン120Cとを備える。第1導電パターン110C及び第2導電パターン120Cは、第1面側からの平面視において、図11のようなパターン形状である。
<第3実施形態>
まず、スパッタリング法や金属箔転写により、透明基材600の両面に第1黒化膜層・金属膜層・第2黒化膜層をこの順で形成する。更に、第2黒化膜層の上にレジスト層を形成し、パターンマスクを用いて露光・現像することによりレジスト層をパターニングする。その後、パターニングされたレジスト層をエッチングマスクとして、第1黒化膜層・金属膜層・第2黒化膜層のエッチングを行なうことで、透明基材600の両面に、導電パターンで構成された電極、ダミー部、接続部、端子部、引回し配線を同時に形成する。
3,130,600 透明基材
10,110 第1導電パターン
11,111 第1金属細線
12,112 第2金属細線
13,113 第1屈曲線
14,114 第1金属辺
15,115 第2金属辺
20,120 第2導電パターン
21,121 第3金属細線
22,122 第4金属細線
23,123 第2屈曲線
24,124 第3金属辺
25,125 第4金属辺
500 タッチセンサ
700 第1電極
800 第2電極
710 第1接続部
810 第2接続部
720 第1端子部
820 第2端子部
730 第1引回し配線
830 第2引回し配線
740 第1ダミー部
840 第2ダミー部
Claims (11)
- 透明基材と、
前記透明基材の一方の面に、第1方向に延びる複数の第1金属細線と、その第1金属細線と交差するように第2方向に延びる複数の第2金属細線によって、複数の第1開口部が第1方向及び第2方向に連続して配置されるようにメッシュ状に形成された第1導電パターンと、を備え、
前記第1金属細線と前記第2金属細線とは、各々が交差する箇所に形成された共通の第1屈曲線を含み、
前記第1屈曲線は、前記第1金属細線と前記第2金属細線によって形成された、対向する第1鈍角部同士を接続する、導電シート。 - 前記第1屈曲線から次の第1屈曲線まで延びる前記第1金属細線及び第2金属細線をそれぞれ第1金属辺及び第2金属辺とすると、前記第1屈曲線を挟んで対向する前記第1金属辺と前記第2金属辺は、長さが等しくなるように構成された、請求項1に記載の導電シート。
- 前記第1金属辺又は前記第2金属辺の両端にある前記第1屈曲線は、平行である、請求項1又は請求項2に記載の導電シート。
- 前記透明基材の他方の面に、前記第1金属細線と重ならないように第1方向に延びる複数の第3金属細線と、その第3金属細線と交差し且つ前記第2金属細線と重ならないように第2方向に延びる複数の第4金属細線によって、複数の第2開口部が第1方向及び第2方向に連続して配置されるようにメッシュ状に形成された第2導電パターンを更に備え、
前記第3金属細線と前記第4金属細線とは、各々が交差する箇所に形成された共通の第2屈曲線を含み、
前記第2屈曲線は、前記第3金属細線と前記第4金属細線によって形成された、対向する第2鈍角部同士を接続する、請求項1から請求項3のいずれかに記載の導電シート。 - 前記第2屈曲線から次の第2屈曲線まで延びる前記第3金属細線及び第4金属細線をそれぞれ第3金属辺及び第4金属辺とすると、前記第2屈曲線を挟んで対向する前記第3金属辺と前記第4金属辺は、長さが等しくなるように構成された、請求項4に記載の導電シート。
- 前記第3金属辺又は前記第4金属辺の両端にある前記第2屈曲線は、平行である、請求項4又は請求項5に記載の導電シート。
- 前記第2屈曲線は、前記第1開口部の中心に位置する、請求項4から請求項6のいずれかに記載の導電シート。
- 前記第2金属細線は、前記第1屈曲線から次の第1屈曲線の間に金属細線が形成されていない第1断線部を含み、
前記第3金属細線は、前記第2屈曲線から次の第2屈曲線の間に金属細線が形成されていない第2断線部を含み、
前記第1断線部と前記第2断線部とは、交差しない、請求項4から請求項7のいずれかに記載の導電シート。 - 前記第2金属細線は、前記第2金属辺と前記第1断線部とが交互に配置され、
前記第3金属細線は、前記第3金属辺と前記第2断線部とが交互に配置された、請求項8に記載の導電シート。 - 前記第1導電パターン及び前記第2導電パターンが複数の第1電極及び複数の第2電極をそれぞれ構成し、その複数の第1電極及び複数の第2電極の端部にそれぞれ形成された第1接続部及び第2接続部を有する請求項4に記載の導電シートと、
外部配線と接続される端子部と、
前記第1接続部及び前記第2接続部と前記端子部とを接続する引回し配線と、を備えたタッチセンサ。 - 透明基材の両面に第1黒化膜層と金属膜層と第2黒化膜層とを順次形成する工程と、
前記透明基材の第1面に第1導電パターンで構成された複数の第1電極と、その複数の第1電極の端部にそれぞれ形成された第1接続部と、外部配線と接続される第1端子部と、前記第1接続部と前記第1端子部とを接続する第1引回し配線とを、前記透明基材の第2面に第2導電パターンで構成された複数の第2電極と、その複数の第2電極の端部にそれぞれ形成された第2接続部と、外部配線と接続される第2端子部と、前記第2接続部と前記第2端子部とを接続する第2引回し配線とを、同時にそれぞれ形成する工程と、を
備え、
前記第1導電パターンは、第1方向に延びる複数の第1金属細線と、その第1金属細線と交差するように第2方向に延びる複数の第2金属細線によって、複数の第1開口部が第1方向及び第2方向に連続して配置されるようにメッシュ状に形成され、
前記第2導電パターンは、前記第1金属細線と重ならないように第1方向に延びる複数の第3金属細線と、その第3金属細線と交差し且つ前記第2金属細線と重ならないように第2方向に延びる複数の第4金属細線によって、複数の第2開口部が第1方向及び第2方向に連続して配置されるようにメッシュ状に形成され、
前記第1金属細線と前記第2金属細線とは、各々が交差する箇所に形成された共通の第1屈曲線を含み、
前記第1屈曲線は、前記第1金属細線と前記第2金属細線によって形成された、対向する第1鈍角部同士を接続し、
前記第3金属細線と前記第4金属細線とは、各々が交差する箇所に形成された共通の第2屈曲線を含み、
前記第2屈曲線は、前記第3金属細線と前記第4金属細線によって形成された、対向する第2鈍角部同士を接続する、タッチセンサの製造方法。
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JP2019075069A (ja) * | 2017-10-16 | 2019-05-16 | 日本航空電子工業株式会社 | タッチパネル |
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- 2022-04-25 CN CN202280033733.8A patent/CN117280309A/zh active Pending
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JP2006344163A (ja) | 2005-06-10 | 2006-12-21 | Nissha Printing Co Ltd | 静電容量型タッチパネル |
US20120261242A1 (en) * | 2011-04-18 | 2012-10-18 | Guard David Brent | Two-Layer Sensor Stack |
JP2015109067A (ja) * | 2013-10-22 | 2015-06-11 | パナソニックIpマネジメント株式会社 | 入力装置および表示装置 |
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JP2019075069A (ja) * | 2017-10-16 | 2019-05-16 | 日本航空電子工業株式会社 | タッチパネル |
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