WO2021235145A1 - 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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- WO2021235145A1 WO2021235145A1 PCT/JP2021/015625 JP2021015625W WO2021235145A1 WO 2021235145 A1 WO2021235145 A1 WO 2021235145A1 JP 2021015625 W JP2021015625 W JP 2021015625W WO 2021235145 A1 WO2021235145 A1 WO 2021235145A1
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- intersection
- vertex
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- virtual
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- 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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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- 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
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
Definitions
- the present invention relates to a method for manufacturing a conductive sheet, a touch sensor and a touch sensor, and particularly to a method for manufacturing a conductive sheet, a touch sensor and a touch sensor including a mesh-shaped thin metal wire.
- an electrode for a touch sensor an electrode having a mesh-like fine metal wire pattern formed on a transparent base material has been used.
- a grid shape in which polygons such as squares, rhombuses and hexagons are laid out is generally used.
- such a grid shape may interfere with the periodic pattern of the black matrix of the display device arranged under the touch sensor to cause moire (striped pattern).
- the mesh pattern is irregularized, and moire due to interference with the black matrix of the display device is less likely to occur.
- the shape of the mesh is irregularly patterned to suppress moiré, if the internal angle formed by the intersection of the metal thin lines becomes narrower, the width of the metal fine lines may become wider near the intersection, which is visible as glare. May be done.
- the pattern is irregular, if there are dense and sparse metal wires in the same plane, it may be visually recognized as glare.
- An object of the present invention is to provide a method for manufacturing a conductive sheet, a touch sensor, and a touch sensor in which glare is suppressed and visibility is improved when the shape of the mesh is irregularly patterned.
- the first invention comprises a transparent base material and a plurality of fine metal wires formed in a mesh shape on one surface of the transparent base material, wherein the plurality of fine metal wires are a transparent base material.
- n-sided n ⁇ 5
- the virtual pattern includes 6 connecting lines connecting the 6th intersection, and each vertex is set counterclockwise from the 1st vertex to the 6th vertex, and is arranged on the side connecting the 1st vertex and the 2nd vertex.
- intersections are the first intersection, and the intersections arranged on each side of the virtual pattern are counterclockwise from the second intersection to the sixth intersection, from the first vertex to the first intersection, from the first vertex to the sixth intersection, and the third.
- the distances from the 2 vertices to the 2nd intersection, the 4th vertex to the 3rd intersection, the 4th vertex to the 4th intersection, and the 6th vertex to the 5th vertex are arranged so as to be equal, and the virtual pattern is inverted left and right.
- the virtual pattern is arranged on each side of the inverted virtual pattern, with each vertex being clockwise from the first vertex to the sixth vertex, and the intersection arranged on the side connecting the first vertex and the second vertex as the first intersection.
- intersections are clockwise from the second intersection to the sixth intersection, from the first vertex to the first intersection, from the first vertex to the sixth intersection, from the second vertex to the second intersection, from the fourth vertex to the third intersection, and the fourth.
- the distances from the vertices to the 4th intersection and from the 6th vertex to the 5th intersection are arranged to be equal, and the virtual pattern and the inverted virtual pattern are such that the intersections of adjacent virtual patterns or inverted virtual patterns overlap and are plural.
- the opening regions formed by the fine metal lines of the above are laid out so as to be arranged aperiodically, the length of one side of the virtual pattern is A, the length of one side of the n-sided is B, and the inside angle of the n-sided is ⁇ .
- the second invention is a conductive sheet having a relationship of A / 4 ⁇ C ⁇ A / 2, where the n-sided polygon is n ⁇ 6 and the length of the connecting line is C in the first aspect of the invention. ..
- the internal angle formed by the intersection of the metal thin wires becomes wide, so it is possible to prevent the width of the metal thin wires near the intersection from becoming wide. Further, since the virtual pattern in which the n-sided polygon and the line are arranged evenly is spread to form the metal fine line, the metal fine line is arranged evenly. As a result, glare can be suppressed and visibility can be improved.
- the plurality of fine metal wires are formed by laminating a first blackening layer, a metal layer, and a second blackening layer in this order from the side of the transparent substrate. It is a conductive sheet.
- the fourth invention is the conductive sheet in which the plurality of thin metal wires have a blackened layer formed on the side surface in the third invention.
- the blackening layer is formed on the surface of the fine metal wire, so that the reflectance can be reduced on the surface of the fine metal wire.
- the conductive sheet of the first invention having a plurality of metal wires constituting a plurality of electrodes and having connection portions formed at the ends of the plurality of electrodes, and a terminal connected to an external wiring. It is a touch sensor provided with a portion, a routing wiring for connecting the connection portion and the terminal portion, and a wiring.
- the plurality of electrodes are formed in the operation region, the routing wiring is formed in the peripheral region other than the operation region, and the plurality of electrodes in the operation region are not formed. It is a touch sensor further provided with a dummy portion in the region which is not electrically connected to a plurality of electrodes.
- the seventh invention is a touch sensor in which the plurality of electrodes have a band shape and the plurality of electrodes and dummy portions are alternately arranged.
- the eighth invention is the seventh invention, in which the dummy portion is a touch sensor composed of a plurality of thin metal wires.
- the electrode portion and the dummy portion are composed of the same thin metal wire and have the same pattern, so that the visibility can be further improved.
- the ninth invention comprises a step of sequentially forming a first blackening film layer, a metal film layer, and a second blackening film layer on one surface of a transparent base material, a first blackening film layer, a metal film layer, and a ninth.
- 6 connecting lines connecting the 1st to 6th vertices arranged on each side of the virtual pattern, and the virtual pattern makes each vertex counterclockwise from the 1st vertex to the 6th vertex.
- intersections arranged on the side connecting the first vertex and the second vertex are set as the first intersection, and each intersection arranged on each side of the virtual pattern is set as the second to sixth intersections counterclockwise, and the first vertex is set.
- the distances from the first vertex to the sixth vertex, from the second vertex to the second vertex, from the fourth vertex to the third vertex, from the fourth vertex to the fourth vertex, and from the sixth vertex to the fifth vertex are equal.
- inverted virtual pattern which is arranged so as to be, and the virtual pattern is inverted left and right, each vertex is clockwise from the first vertex to the sixth vertex, and the intersection arranged on the side connecting the first vertex and the second vertex is set.
- each intersection arranged on each side of the inverted virtual pattern is clockwise from the second vertex to the sixth vertex, from the first vertex to the first vertex, from the first vertex to the sixth vertex, and from the second vertex.
- the distances from the second vertex, the fourth vertex to the third vertex, the fourth vertex to the fourth vertex, and the sixth vertex to the fifth vertex are equal to each other, and the virtual pattern and the inverted virtual pattern are adjacent to each other.
- the intersections of the virtual pattern or the inverted virtual pattern overlap each other, and the opening regions formed by a plurality of thin metal lines are laid out so as to be arranged aperiodically, and the length of one side of the virtual pattern is A or n-sided.
- connection lines at the ends of a plurality of electrodes composed of a plurality of fine metal wires formed so as to connect the apex of the n-sided shape and the intersection having the shortest distance from the apex. It is a method of manufacturing a touch sensor including a step of simultaneously forming a connection portion formed, a terminal portion connected to an external wiring, and a routing wiring connecting the connection portion and the terminal portion.
- connection portions a plurality of electrodes, connection portions, terminal portions, and routing wires are formed at the same time, so that the number of processes can be reduced and the manufacturing time can be shortened.
- the present invention it is possible to provide a method for manufacturing a conductive sheet, a touch sensor, and a touch sensor in which glare is suppressed and visibility is improved when the mesh shape is irregularly patterned.
- FIG. 1 is a partially enlarged plan view of (a) a virtual pattern Xa and (b) a partially enlarged plan view of an inverted virtual pattern Xb according to the first embodiment of the present invention. It is a partially enlarged plan view explaining how to spread a virtual pattern Xa and an inverted virtual pattern Xb. It is (a) schematic plan view of the touch sensor by 2nd Embodiment of this invention, (b) (a) a partially enlarged plan view of the region K.
- the conductive sheet 10 includes a transparent base material 11 and a plurality of thin metal wires 12 formed in a mesh shape on one surface of the transparent base material 11. It is equipped with.
- the plurality of thin metal wires 12 include a hexagon formed in the virtual pattern Xa and the inverted virtual pattern Xb and six connecting lines.
- the virtual pattern Xa in which a hexagon and six connecting lines are formed by a plurality of thin metal wires 12 and the inverted virtual pattern Xb in which Xa is inverted left and right are on each side of the adjacent virtual pattern Xa or the inverted virtual pattern Xb.
- the arranged intersections overlap each other, and the opening regions R formed by the plurality of thin metal wires 12 are laid out so as to be arranged aperiodically. Details of the virtual pattern Xa and the inverted virtual pattern Xb will be described later.
- the first blackening layer 13 and the second blackening layer 15 are laminated from the transparent base material 11 side.
- the first blackening layer 13 and the second blackening layer 15 are layers for reducing the reflectance of the thin metal wire 12 and improving visibility.
- the material of the transparent base material 11 is not particularly limited as long as it is flexible, and for example, polyesters such as polyethylene terephthalate (PET), polylactic acid (PLA), and polyethylene naphthalate (PEN), polyethylene (PE), and polypropylene.
- PET polyethylene terephthalate
- PLA polylactic acid
- PEN polyethylene
- PE polypropylene
- PP Polyethylene
- EVA Polyethylenes such as Cycloolefin Polymer (COP) and Cyclic Olefin Copolymer (COC), Vinyl Resin, Polycarbonate (PC), Polyethylene, Polyethylene (PI), Acrylic Resin (PMMA), Tri Resin films such as acetyl cellulose (TAC), polyurethane, silicone, polyvinyl chloride, and polyvinyl chloride can be used.
- the thickness of the base film 10 is 5 to 500 ⁇ m, preferably 20 to 100 ⁇ m.
- the transparent base material 11 may be a single-layer film or a film in which a plurality of layers are laminated.
- the transparent base material 11 may include a retardation film in the composition.
- the material of the metal layer 14 is not particularly limited, but for example, gold, silver, copper, iron, nickel, chromium, aluminum, molybdenum, titanium and the like, or alloys thereof can be used.
- metal oxides or metal nitrides such as copper, nickel, chromium, aluminum, molybdenum, and titanium can be used.
- the line width of the thin metal wire 12 is, for example, 1 to 10 ⁇ m, preferably 1 to 5 ⁇ m.
- the film thickness of the thin metal wire 12 is, for example, 120 nm to 1.2 ⁇ m.
- the film thickness of the first blackening layer and the second blackening layer is, for example, 10 to 100 nm, and the film thickness of the metal layer 14 is, for example, 100 nm to 1 ⁇ m.
- the aperture ratio of the thin metal wire 12 is, for example, 95% or more, preferably 98% or more.
- the virtual pattern Xa is a regular hexagonal pattern virtually drawn on the transparent substrate 11.
- Each vertex of the virtual pattern Xa is counterclockwise from the first vertex P1a to the sixth vertex P6a.
- the intersections arranged on the side connecting the first vertex P1a and the second vertex P2a are referred to as the first intersection Q1a, and the intersections arranged on each side of the virtual pattern Xa are referred to as the second intersection Q2a to the sixth intersection Q6a.
- the first intersection Q1a to the sixth intersection Q6a are virtual patterns so that the distances between P1a-Q1a, P1a-Q6a, P2a-Q2a, P4a-Q3a, P4a-Q4a, and P6a-Q5a are equal. It is arranged on each side of Xa. Virtual arrows d1a to d6a are drawn below each vertex of the first vertex P1a to the sixth vertex P6a.
- the hexagonal Sa and the connecting lines L1a to L6a are formed by the thin metal wire 12. Each vertex of the hexagon Sa and the first intersection Q1a to the sixth intersection Q6a are connected by connecting lines L1a to L6a, respectively.
- a hexagonal Sa is arranged near the center of the virtual pattern Xa, and connecting lines L1a to L6a extend radially from each vertex of the hexagonal Sa to an intersection on each side of the virtual pattern Xa.
- the connecting lines L1a to L6a connect the apex of the hexagon Sa and any of the intersections Q1a to Q6a having the shortest distance from the apex.
- the inverted virtual pattern Xb is a left-right inverted version of the virtual pattern Xa.
- Each vertex of the inverted virtual pattern Xb is clockwise from the first vertex P1b to the sixth vertex P6b.
- the intersections arranged on the side connecting the first vertex P1b and the second vertex P2b are referred to as the first intersection Q1b, and the intersections arranged on each side of the inverted virtual pattern Xb are referred to as the second intersection Q2b to the sixth intersection Q6b.
- the first intersection Q1b to the sixth intersection Q6b are virtual inverted so that the distances between P1b-Q1b, P1b-Q6b, P2b-Q2b, P4b-Q3b, P4b-Q4b, and P6b-Q5b are equal. It is arranged on each side of the pattern Xb. Virtual arrows d1b to d6b are drawn below each vertex of the first vertex P1b to the sixth vertex P6b.
- each virtual arrow d1b to d6b is P1b up with the line connecting P1b and P4b as the axis, and when P4b is down, d1b points to the left direction, d2b points to the left diagonally upward direction, and d3b points to the left. Diagonally downward, d4b points to the left, d5b points diagonally downward to the right, and d6b points diagonally upward to the right.
- the virtual pattern Xa and the inverted virtual pattern Xb are spread so that a large number of opening regions formed by the thin metal wires 12 are arranged aperiodically. In other words, the virtual pattern Xa and the inverted virtual pattern Xb are spread so that the opening regions having the same shape are not periodically arranged.
- Virtual patterns are spread by combining those rotated clockwise by 60 °. That is, the virtual patterns used are Xa, 60 ° rotated Xa, 120 ° rotated Xa, 180 ° rotated Xa, 240 ° rotated Xa, 300 ° rotated Xa, Xb, 60 ° rotated. There are a total of 12 types: Xb rotated by 120 °, Xb rotated by 180 °, Xb rotated by 240 °, and Xb rotated by 300 °.
- the above-mentioned 12 types of virtual patterns and inverted virtual patterns are spread on the transparent base material 11 without gaps according to two rules.
- one of the intersections of the virtual pattern or the inverted virtual pattern and one of the intersections of the adjacent virtual patterns or the inverted virtual patterns are spread so as to overlap each other.
- the connecting line of the virtual pattern or the inverted virtual pattern is always connected to the connecting line of the adjacent virtual pattern or the inverted virtual pattern. Therefore, a large number of opening regions R by a plurality of thin metal wires are arranged.
- the opening region R is a polygon formed in a virtual pattern or an inverted virtual pattern, or a region surrounded by connecting lines and sides of the polygon.
- two virtual patterns or inverted virtual patterns that face each other across one side of the virtual pattern or inverted virtual pattern are virtual so that the directions of the virtual arrows drawn under the opposite vertices are the same.
- Spread patterns and inverted virtual patterns are used. In this way, a large number of opening regions formed by the thin metal wires 12 can be arranged in an aperiodic manner.
- the virtual pattern X1 is the virtual pattern Xa of FIG. 2A
- the virtual pattern X2 is the inverted virtual pattern Xb of FIG. 2B rotated by 240 ° clockwise
- the virtual pattern X3 is Xa clockwise. It is rotated by 240 °.
- X1 and X2 are adjacent to each other so that the sides P3a-P4a of X1 and the sides P3b-P4b of X2 overlap each other. In other words, X1 and X2 share the sides P3a-P4a of X1 (or the sides P3b-P4b of X2).
- X2 and X3 are adjacent to each other so that the sides P5b-P6b of X2 and the sides P5a-P6a of X3 overlap each other. In other words, X2 and X3 share the sides P5b-P6b of X2 (or the sides P5a-P6a of X3). X1 and X3 face each other with the sides P4b-P5b of X2 interposed therebetween. X1 and X3 are arranged so that the apex P4a of X1 and the apex P5a of X3 face each other.
- X1 and X3 face each other with the sides P4b-P5b of X2 interposed therebetween, and are arranged so that the fourth vertex P4a of X1 and the fifth vertex P5a of X2 face each other.
- the length A of one side of the virtual pattern Xa is 150 ⁇ m to 3000 ⁇ m, preferably 500 ⁇ m to 2000 ⁇ m.
- the thickness is 150 ⁇ m or more, it is possible to prevent the fine metal wires 12 from being densely formed on the transparent substrate.
- it is 3000 ⁇ m or less, it is possible to prevent the number of thin metal wires 12 from decreasing and the resistance value from increasing.
- the length B of one side of the hexagon Sa is preferably A / 4 ⁇ m to 3A / 4 ⁇ m.
- B By setting B in such a range, it is possible to prevent the hexagonal Sa and the figure formed by the connecting line and the side of the hexagon from having extremely different areas, and the metal fine line becomes sparse. It is possible to prevent the formation of dense parts.
- the internal angle ⁇ of each hexagon Sa is preferably 90 ° or more. When ⁇ is set to 90 ° or more, the width of the metal thin wire can be controlled to be uniform even near the intersection of the metal thin wires, and the width of the metal thin wire becomes thick near the apex of the hexagonal Sa, which causes glare. You can prevent that.
- the length C of the connecting lines L1a to L6a is preferably A / 4 ⁇ m to A / 2 ⁇ m.
- the conductive sheet 10 is a method of forming a metal film including a blackening layer on a transparent base material 11 by a sputtering method or a metal foil transfer and patterning by etching, or pattern printing a conductive ink on the transparent base material 11. It can be manufactured by the method.
- the hexagonal Sa and the connecting lines L1a to L6a are formed in the virtual pattern Xa by the metal thin wire 12, and each vertex of the hexagonal Sa and the first intersection Q1a to the sixth are formed.
- the intersection Q6a is connected by connecting lines L1a to L6a.
- the virtual pattern Xa or the inverted virtual pattern Xb is rotated so that the intersections of the adjacent virtual patterns Xa or the inverted virtual pattern Xb overlap each other and the opening regions R formed by the plurality of thin metal wires 12 are arranged aperiodically.
- the plurality of metal fine wires 12 are irregularly meshed on the transparent base material 11. It can be formed into a shape.
- the length A of one side of the virtual pattern Xa is A / 4 ⁇ B ⁇ 3A / 4, and the connecting lines L1a to L6a connect the apex of the hexagon Sa and the intersection where the distance from the apex is the shortest.
- the hexagon Sa is arranged near the center of the virtual pattern Xa, and the connecting lines L1a to L6a are arranged so as to extend radially from each vertex of the hexagon Sa to each side of the virtual pattern Xa.
- the touch sensor 100 includes a transparent base material 11, a plurality of electrodes 20A formed on one surface of the transparent base material 11, and a plurality of electrodes.
- a connection portion 30A formed at each end of the 20A, a terminal portion 40A connected to the external wiring, and a routing wiring 50A connecting the connection portion 30A and the terminal portion 40A are provided.
- the touch sensor 100 has a plurality of electrodes 20B formed on the other surface of the transparent base material 11, a connection portion 30B formed at each end of the plurality of electrodes 20B, and a terminal portion connected to external wiring. It is provided with 40B and a routing wiring 50B for connecting the connection portion 30B and the terminal portion 40B.
- the transparent base material 11 is divided into an operation area V1 and a peripheral area V2.
- the operation area V1 is an area of the touch sensor 100 where an input operation is performed by the user
- the peripheral area V2 is an area covered with a frame-shaped decorative layer or the like of the cover base material after assembly.
- a plurality of electrodes 20A and a dummy portion 21A are formed in the operation region V1 on one surface of the transparent substrate, and a connection portion 30A, a terminal portion 40A, and a routing wiring 50A are formed in the peripheral region V2.
- the plurality of electrodes 20A are formed in the operation region V1.
- the plurality of electrodes 20A have a band shape and are arranged on the surface of the transparent base material 11 so as to extend in the y-axis direction and line up four in the x-axis direction.
- the plurality of electrodes 20A are composed of the plurality of thin metal wires described in the first embodiment. These plurality of electrodes 20A constitute electrodes of the touch sensor.
- the size of the plurality of electrodes 20A is not particularly limited because it is determined by the size and resolution of the operation region V1, but if the length of one side of the above-mentioned virtual pattern Xa is A and the width of the electrodes 20A is W, 3A. It is preferable to satisfy the relationship of ⁇ W.
- the dummy portion 21A is formed in a region of the operation region V1 in which a plurality of electrodes 20A are not formed.
- the electrodes 20A and the dummy portions 21A are arranged alternately.
- the dummy portion 21A is composed of a plurality of thin metal wires described in the first embodiment.
- the disconnection portion 22A is formed so as to divide the operation region V1 to form a band shape of the electrode 20A, and the electrode 20A and the dummy portion are separated by the disconnection portion 22A.
- the thin metal wire 12 is not formed on the broken wire portion 22A.
- the width of the broken portion 22A is preferably 1 to 10 ⁇ m. When the width of the broken portion 22A is set within this range, it is possible to prevent the boundary line between the electrode and the dummy portion from being seen due to the presence or absence of the thin metal wire.
- the connection portion 30A is for connecting the electrode 20A and the routing wiring 40A.
- the connecting portion 30A allows the thin metal wires 12 constituting the electrode 20A to be routed together and connected to the wiring 40A.
- the connecting portion 30A has a rectangular shape and is formed at one end in the longitudinal direction of the band-shaped electrode 20A.
- the connecting portion 30A is formed in the peripheral region V2 so as to overlap a part of the plurality of thin metal wires 12 constituting the plurality of electrodes 20A.
- the electrode 20A extends to the boundary line of the operation area V1, and one side of the rectangle of the connecting portion 30A overlaps the boundary line between the operation area V1 and the peripheral area V2.
- the width of the connecting portion 30A is equal to the width of the electrode 20A.
- the connecting portion 30A is composed of a laminated film in which a first blackening layer, a metal layer, and a second blackening layer are laminated in this order from the transparent base material 11 side.
- the terminal portion 40A is for connecting the touch sensor 100 to an external wiring such as a flexible wiring board, and is formed near the outer edge on the transparent base material 11.
- the routing wiring 50A is for connecting the electrode 20A and the terminal portion 40A, and is connected to the terminal portion 40A so as to be bent in the middle and gathered near the center. Similar to the fine metal wire 12, the terminal portion 40A and the routing wiring 50A are laminated in the order of the first blackening layer, the metal layer, and the second blackening layer from the transparent base material 11 side.
- a plurality of electrodes 20B and a dummy portion 21B are formed in the operation region V1 on the other surface of the transparent base material, and a connection portion 30B, a terminal portion 40B, and a routing wiring 50B are formed in the peripheral region V2, respectively.
- the plurality of electrodes 20B are arranged on the back surface of the transparent base material 11 so as to extend in the x-axis direction and line up in the y-axis direction.
- the connecting portion 30B is formed at one end in the longitudinal direction of the plurality of electrodes 20B having a band shape.
- the terminal portions 40A and 40B formed on both the front and back surfaces of the transparent base material 11 are connected to a flexible printed substrate (not shown).
- the flexible printed circuit board is connected to a control unit that realizes a capacitive touch detection.
- the control unit detects the current flowing according to the change in capacitance generated in the plurality of electrodes 20A and 20B, so that the user can perform touch operation and touch position. Can be detected.
- the first blackening film layer, the metal film layer, and the second blackening film layer are formed in this order on both surfaces of the transparent base material 11 by a sputtering method or metal foil transfer. Further, 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, the patterned resist layer is used as an etching mask to etch the first blackened film layer, the metal film layer, and the second blackened film layer, whereby a plurality of fine metal wires are formed on both sides of the transparent base material 11.
- the electrode, dummy part, disconnection part, connection part, terminal part, and routing wiring are formed at the same time.
- the metal thin wires 20A and 20B are sparse and dense. It is possible to suppress the occurrence of glare due to the difference and the occurrence of glare due to the widening of the width of the metal thin wire near the intersection where the metal thin wire intersects.
- the dummy portion is formed in the operation region V1 where a plurality of electrodes are not formed, the bone appearance phenomenon in which the electrode pattern shape is observed by the operator due to the presence or absence of the electrodes is suppressed. However, it is possible to prevent a decrease in visibility. Since the dummy portion is composed of a plurality of thin metal wires according to the first embodiment as in the case of the plurality of electrodes, it is possible to suppress the occurrence of glare in both the dummy portion and the plurality of electrodes. Therefore, the visibility of the operation area V1 of the touch sensor 100 can be improved.
- the method for manufacturing the touch sensor 100 according to the second embodiment since a plurality of electrodes, dummy portions, connection portions, terminal portions, and routing wires can be formed at the same time, it is possible to prevent the manufacturing process from becoming complicated. ..
- the hexagonal Sa is formed in the virtual pattern Xa, but the Sa may be an n-sided polygon (n ⁇ 5).
- n 5 that is, when Sa is a pentagon
- five connecting lines from the connecting lines L1a to L6a connect the vertices of the pentagon Sa and the intersections on the virtual pattern Xa, and the remaining one is virtual with the side of the pentagon Sa. Connect the remaining intersections on pattern Xa.
- the length C of the connecting lines L1a to L6a may be A / 4 ⁇ C ⁇ A / 2.
- the connecting lines L1a to L6a may connect the apex of the polygon Sa and the intersection on the virtual pattern Xa where the distance from the apex is the shortest. Further, the length C of the connecting lines L1a to L6a may be A / 4 ⁇ C ⁇ A / 2.
- the virtual pattern Xa and the inverted virtual pattern Xb are spread by rotating them clockwise, but the virtual pattern Xa and the inverted virtual pattern Xb are used by rotating them counterclockwise. May be good.
- the opening region is formed only by the polygon and the connecting line formed in the virtual pattern Xa and the inverted virtual pattern Xb, and the metal thin wire 12 is formed in a mesh shape. May be added. In that case, the metal thin wire 12 is arranged so that the added metal thin wire 12 is not arranged periodically.
- the thin metal wire 12 is laminated in the order of the first blackening layer, the metal layer, and the second blackening layer, but the laminated structure of the thin metal wire is not limited to this.
- it may be configured to have only a metal layer, a configuration in which a metal layer and a blackened layer are laminated in this order from the transparent substrate side, or a configuration in which the upper surface and side surfaces of the metal layer formed on the transparent substrate are covered.
- a blackening layer may be formed.
- the metal layer may be completely surrounded by a blackening layer. With this configuration, it is possible to further suppress glare when the touch sensor is assembled.
- a plurality of fine metal wires are formed on one side of the transparent base material of the conductive sheet, but fine metal wires may be formed on both sides of the transparent base material.
- the visibility can be further improved by forming the blackening layer on at least the upper surface and the lower surface of the metal layer.
- the plurality of electrodes 20A and 20B have a band shape, but the shape of the electrodes is not limited to this.
- Other shapes of the electrodes may be, for example, a shape in which rhombuses are continuous or a comb-teeth shape.
- the number of electrodes, the position of the routing wiring, and the position of the terminal portion are not particularly limited.
- the dummy portion is composed of the metal thin wire according to the first embodiment, but the metal fine wire pattern of the dummy portion is not limited to this.
- the dummy portion may be formed of a fine metal wire pattern that can suppress the occurrence of glare.
- electrodes are formed on both sides of the transparent base material 11 of the touch sensor 100, but the configuration of the touch sensor is not limited to this.
- Two transparent base materials having electrodes formed on one surface may be bonded so that the other side of the transparent base material faces each other, or the other surface of the transparent base material is overlapped on the electrodes via an adhesive layer. You may stick them together in this way.
- connection portion is formed at one end of the electrode, but the connection portion may be formed at both ends in the longitudinal direction of the electrode.
- the connection portion 30B is formed at the left end portion of the electrode 20B
- the connection portion 30B may be further formed at the right end portion of the electrode 20B.
- the terminal portion 40B is also formed on the right side of the terminal portion 40A, and each routing wiring 50B is connected to the terminal portion 40B.
- the position of the terminal portion and the arrangement of the routing wiring are not particularly limited.
- a plurality of electrodes, dummy portions, connection portions, terminal portions, and routing wires are formed at the same time, but the manufacturing method of the touch sensor 100 is not limited to this.
- the broken metal wire may be broken by a laser to form a broken wire portion, and a plurality of electrodes and a dummy portion may be formed.
- the connection portion, the terminal portion, and the routing wiring may be formed in the peripheral region V2.
- the transparent base material 11 instead of forming the transparent base material 11 on both sides at the same time, the transparent base material 11 may be formed on one side at a time.
- Conductive sheet 11 Transparent base material 12 Metal thin wire 13 First blackening layer 14 Metal layer 15 Second blackening layer 20A, 20B Electrodes 21A, 21B Dummy part 22A, 22B Disconnection part 30A, 30B Terminal part 40A, 40B Route wiring 50A, 50B connection part 100 touch sensor
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Abstract
Description
150μm≦A≦3000μm
A/4≦B≦3A/4
90°≦θ
の関係を有し、
(i)n角形は、n=5であり、連結線のうち5本は、n角形の頂点とその頂点からの距離が最短となる交点とを結び、連結線のうち1本は、n角形の辺と交点とを結び、連結線の長さをCとすると、A/4≦C≦A/2の関係を有し、又は(ii)n角形は、n≧6であり、連結線は、n角形の頂点とその頂点からの距離が最短となる交点とを結ぶ、導電シートである。
150μm≦A≦3000μm
A/4≦B≦3A/4
90°≦θ
の関係を有し、(i)n角形は、n=5であり、連結線のうち5本は、n角形の頂点とその頂点からの距離が最短となる交点とを結び、連結線のうち1本は、n角形の辺と交点とを結び、連結線の長さをCとすると、A/4≦C≦A/2の関係を有する、又は(ii)n角形は、n≧6であり、連結線は、n角形の頂点とその頂点からの距離が最短となる交点とを結ぶように形成された複数の金属細線で構成された複数の電極と、その複数の電極の端部にそれぞれ形成された接続部と、外部配線と接続される端子部と、接続部と端子部とを接続する引回し配線と、を同時に形成する工程とを備えた、タッチセンサの製造方法である。
<第1実施形態>
図2(a)を参照して、仮想パターンXaは、透明基材11上に仮想的に描かれる正六角形のパターンである。仮想パターンXaの各頂点は、反時計回りに第1頂点P1aから第6頂点P6aとする。第1頂点P1aと第2頂点P2aを結ぶ辺に配置された交点を第1交点Q1aとして、仮想パターンXaの各辺に配置された各交点を第2交点Q2aから第6交点Q6aとする。P1a-Q1a間、P1a-Q6a間、P2a-Q2a間、P4a-Q3a間、P4a-Q4a間、P6a-Q5a間の距離がそれぞれ等しくなるように、第1交点Q1aから第6交点Q6aが仮想パターンXaの各辺上に配置されている。第1頂点P1aから第6頂点P6aの各頂点の下に、仮想矢印d1aからd6aがそれぞれ描かれている。それぞれの仮想矢印d1aからd6aが指す方向は、P1aとP4aを結ぶ線を軸としてP1aを上、P4aを下とすると、d1aは右方向を指し、d2aは右斜め上方向を指し、d3aは右斜め下方向を指し、d4aは右方向を指し、d5aは左斜め下方向を指し、d6aは左斜め上方向を指す。尚、仮想パターンXaを時計回りに60°回転させると、図2(a)のP1aの位置にP2aが配置される。60°回転させたXaにおいて、P2aとP5aを結ぶ線を軸としてP2aを上、P5aを下とすると、d2aは右方向を指し、d3aは左斜め下方向を指し、d4aは右斜め下方向を指し、d5aは左方向を指し、d6aは右斜め上方向を指し、d1aは右斜め下方向を指す。
仮想パターンは、時計回りに60°ずつ回転させたものを組み合わせて敷き詰める。つまり、使用する仮想パターンは、Xa、60°回転させたXa、120°回転させたXa、180°回転させたXa、240°回転させたXa、300°回転させたXa、Xb、60°回転させたXb、120°回転させたXb、180°回転させたXb、240°回転させたXb、300°回転させたXb、の計12種類である。
第一に、仮想パターン又は反転仮想パターンの各交点のいずれかと、隣接する仮想パターン又は反転仮想パターンの各交点のいずれかが重なるように敷き詰める。このようにすると、仮想パターン又は反転仮想パターンの連結線は、隣接する仮想パターン又は反転仮想パターンの連結線と必ず連結する。よって、複数の金属細線による多数の開口領域Rが配列される。開口領域Rは、仮想パターン又は反転仮想パターンの中に形成された多角形か、又は連結線と多角形の辺によって囲まれた領域である。
第二に、仮想パターン又は反転仮想パターンの1辺を挟んで対向する2つの仮想パターン又は反転仮想パターンは、その対向する頂点の下に描かれた仮想矢印の方向が同じになるように、仮想パターンと反転仮想パターンを敷き詰める。このようにすると、金属細線12によって形成される多数の開口領域を、非周期的な配列とすることができる。
仮想パターンX1は図2(a)の仮想パターンXaであり、仮想パターンX2は図2(b)の反転仮想パターンXbを時計回りに240°回転させたもの、仮想パターンX3はXaを時計回りに240°回転させたものである。X1とX2は、X1の辺P3a-P4aとX2の辺P3b-P4bが重なるように隣接している。言い換えると、X1とX2は、X1の辺P3a-P4a(又はX2の辺P3b-P4b)を共有している。X2とX3は、X2の辺P5b-P6bとX3の辺P5a-P6aが重なるように隣接している。言い換えると、X2とX3は、X2の辺P5b-P6b(又はX3の辺P5a-P6a)を共有している。X1とX3とは、X2の辺P4b-P5bを挟んで対向している。X1の頂点P4aとX3の頂点P5aとが対向するように、X1とX3が配置されている。
第二に、X1とX3は、X2の辺P4b-P5bを挟んで対向しており、X1の第4頂点P4aと、X2の第5頂点P5aが対向するように配置されている。X1のP1aとP4aを結ぶ線を軸としてP1aがある方を上、P4aがある方を下とすると、X1の第4頂点P4aの仮想矢印d4aとX3の第5頂点P5aの矢印d5aは、ともに右方向を指す矢印である。このようにして、金属細線により形成される多数の開口領域を非周期的な配列にする。
<第2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11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11の両面に、複数の金属細線で構成された電極、ダミー部、断線部、接続部、端子部、引回し配線を同時に形成する。
11 透明基材
12 金属細線
13 第1黒化層
14 金属層
15 第2黒化層
20A、20B 電極
21A、21B ダミー部
22A、22B 断線部
30A、30B 端子部
40A、40B 引回し配線
50A、50B 接続部
100 タッチセンサ
Claims (9)
- 透明基材と、
前記透明基材の一方面にメッシュ状に形成された複数の金属細線と、を備え、
前記複数の金属細線は、透明基材上に仮想的に敷き詰められた正六角形からなる仮想パターン及び反転仮想パターンの中に形成されたn角形(n≧5)と、そのn角形と前記仮想パターンの各辺に配置された第1交点から第6交点とを繋いだ6本の連結線とを含み、
前記仮想パターンは、その各頂点を反時計回りに第1頂点から第6頂点とし、第1頂点と第2頂点を結ぶ辺に配置された交点を第1交点として、前記仮想パターンの各辺に配置された各交点を反時計回りに第2交点から第6交点とし、第1頂点から第1交点、第1頂点から第6交点、第2頂点から第2交点、第4頂点から第3交点、第4頂点から第4交点、第6頂点から第5交点までの距離がそれぞれ等しくなるように配置され、
前記仮想パターンを左右反転させた前記反転仮想パターンは、その各頂点を時計回りに第1頂点から第6頂点とし、第1頂点と第2頂点を結ぶ辺に配置された交点を第1交点として、前記反転仮想パターンの各辺に配置された各交点を時計回りに第2交点から第6交点とし、第1頂点から第1交点、第1頂点から第6交点、第2頂点から第2交点、第4頂点から第3交点、第4頂点から第4交点、第6頂点から第5交点までの距離がそれぞれ等しくなるように配置され、
前記仮想パターンと前記反転仮想パターンとは、隣接する仮想パターン又は前記反転仮想パターンの各交点が重なり、かつ前記複数の金属細線で形成される開口領域が非周期的に配列されるように敷き詰められ、
前記仮想パターンの1辺の長さをA、前記n角形の1辺の長さをB、前記n角形の内角をθとすると、
150μm≦A≦3000μm
A/4≦B≦3A/4
90°≦θ
の関係を有し、
(i)前記n角形は、n=5であり、前記連結線のうち5本は、前記n角形の頂点とその頂点からの距離が最短となる交点とを結び、前記連結線のうち1本は、前記n角形の辺と前記交点とを結び、前記連結線の長さをCとすると、A/4≦C≦A/2の関係を有し、
又は
(ii)前記n角形は、n≧6であり、前記連結線は、前記n角形の頂点とその頂点からの距離が最短となる交点とを結ぶ、
導電シート。 - 前記n角形は、n≧6であり、前記連結線の長さをCとすると、A/4≦C≦A/2の関係を有する、請求項1に記載の導電シート。
- 前記複数の金属細線は、前記透明基材の側から第1黒化層と金属層と第2黒化層とがこの順で積層された、請求項1に記載の導電シート。
- 前記複数の金属細線は、側面に黒化層が形成された、請求項3に記載の導電シート。
- 前記複数の金属細線が複数の電極を構成し、その複数の電極の端部にそれぞれ形成された接続部を有する請求項1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。 - 前記複数の電極は、操作領域に形成され、
前記引回し配線は、前記操作領域以外の周辺領域に形成され、
前記操作領域のうち前記複数の電極が形成されていない領域に、前記複数の電極と電気的に接続されていないダミー部を更に備えた、請求項5に記載のタッチセンサ。 - 前記複数の電極は、帯形状であり、
前記複数の電極とダミー部とが交互に配置された、請求項6に記載のタッチセンサ。 - 前記ダミー部は、前記複数の金属細線で構成された、請求項7に記載のタッチセンサ。
- 透明基材の一方面に第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、
前記第1黒化膜層と前記金属膜層と前記第2黒化膜層をエッチングすることで、透明基材上に仮想的に敷き詰められた正六角形からなる仮想パターン及び反転仮想パターンの中に形成されたn角形(n≧5)と、そのn角形と前記仮想パターンの各辺に配置された第1交点から第6交点とを繋いだ6本の連結線とを含み、前記仮想パターンは、その各頂点を反時計回りに第1頂点から第6頂点とし、第1頂点と第2頂点を結ぶ辺に配置された交点を第1交点として、前記仮想パターンの各辺に配置された各交点を反時計回りに第2交点から第6交点とし、第1頂点から第1交点、第1頂点から第6交点、第2頂点から第2交点、第4頂点から第3交点、第4頂点から第4交点、第6頂点から第5交点までの距離がそれぞれ等しくなるように配置され、前記仮想パターンを左右反転させた前記反転仮想パターンは、その各頂点を時計回りに第1頂点から第6頂点とし、第1頂点と第2頂点を結ぶ辺に配置された交点を第1交点として、前記反転仮想パターンの各辺に配置された各交点を時計回りに第2交点から第6交点とし、第1頂点から第1交点、第1頂点から第6交点、第2頂点から第2交点、第4頂点から第3交点、第4頂点から第4交点、第6頂点から第5交点までの距離がそれぞれ等しくなるように配置され、前記仮想パターンと前記反転仮想パターンとは、隣接する仮想パターン又は前記反転仮想パターンの各交点が重なり、かつ前記複数の金属細線で形成される開口領域が非周期的に配列されるように敷き詰められ、前記仮想パターンの1辺の長さをA、前記n角形の1辺の長さをB、前記n角形の内角をθとすると、
150μm≦A≦3000μm
A/4≦B≦3A/4
90°≦θ
の関係を有し、(i)前記n角形は、n=5であり、前記連結線のうち5本は、前記n角形の頂点とその頂点からの距離が最短となる交点とを結び、前記連結線のうち1本は、前記n角形の辺と前記交点とを結び、前記連結線の長さをCとすると、A/4≦C≦A/2の関係を有する、又は(ii)前記n角形は、n≧6であり、前記連結線は、前記n角形の頂点とその頂点からの距離が最短となる交点とを結ぶように形成された複数の金属細線で構成された複数の電極と、その複数の電極の端部にそれぞれ形成された接続部と、外部配線と接続される端子部と、前記接続部と前記端子部とを接続する引回し配線と、を同時に形成する工程とを備えた、タッチセンサの製造方法。
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| JP2015072948A (ja) * | 2013-10-01 | 2015-04-16 | 大日本印刷株式会社 | 導電性メッシュ、導電性メッシュシート、タッチパネル装置および画像表示装置 |
| WO2016080046A1 (ja) * | 2014-11-21 | 2016-05-26 | 富士フイルム株式会社 | 導電性フィルム、及びこれを備えるタッチパネルセンサ |
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| EP2401669B1 (en) | 2009-02-26 | 2016-04-06 | 3M Innovative Properties Company | Touch screen sensor and patterned substrate having overlaid micropatterns with low visibility |
| WO2011125597A1 (ja) * | 2010-03-31 | 2011-10-13 | 富士フイルム株式会社 | 導電性フイルムの製造方法、導電性フイルム及び記録媒体 |
| JP5781886B2 (ja) * | 2011-10-05 | 2015-09-24 | 富士フイルム株式会社 | 導電シート、タッチパネル及び表示装置 |
| JP5224203B1 (ja) * | 2012-07-11 | 2013-07-03 | 大日本印刷株式会社 | タッチパネルセンサ、タッチパネル装置および表示装置 |
| JP2014191445A (ja) * | 2013-03-26 | 2014-10-06 | Fujifilm Corp | タッチパネル及び表示装置 |
| KR102108846B1 (ko) * | 2013-07-16 | 2020-05-11 | 엘지이노텍 주식회사 | 터치 윈도우 |
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| KR102160020B1 (ko) * | 2015-07-24 | 2020-09-25 | 후지필름 가부시키가이샤 | 터치 패널용 도전 필름, 터치 패널, 및 터치 패널 부착 표시 장치 |
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| WO2016080046A1 (ja) * | 2014-11-21 | 2016-05-26 | 富士フイルム株式会社 | 導電性フィルム、及びこれを備えるタッチパネルセンサ |
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| EP4137920A4 (en) | 2023-09-20 |
| KR20230014683A (ko) | 2023-01-30 |
| JP7012120B2 (ja) | 2022-01-27 |
| CN115698920B (zh) | 2025-07-01 |
| EP4137920A1 (en) | 2023-02-22 |
| TW202204847A (zh) | 2022-02-01 |
| US20230205378A1 (en) | 2023-06-29 |
| JP2021184175A (ja) | 2021-12-02 |
| CN115698920A (zh) | 2023-02-03 |
| KR102838884B1 (ko) | 2025-07-25 |
| TWI865771B (zh) | 2024-12-11 |
| EP4137920B1 (en) | 2024-05-01 |
| US11868157B2 (en) | 2024-01-09 |
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