WO2017056977A1 - Procédé de fabrication d'un capteur de panneau tactile et capteur de panneau tactile - Google Patents

Procédé de fabrication d'un capteur de panneau tactile et capteur de panneau tactile Download PDF

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Publication number
WO2017056977A1
WO2017056977A1 PCT/JP2016/077023 JP2016077023W WO2017056977A1 WO 2017056977 A1 WO2017056977 A1 WO 2017056977A1 JP 2016077023 W JP2016077023 W JP 2016077023W WO 2017056977 A1 WO2017056977 A1 WO 2017056977A1
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Prior art keywords
conductive thin
electrode
touch panel
panel sensor
thin wire
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PCT/JP2016/077023
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English (en)
Japanese (ja)
Inventor
大屋　秀信
正好 山内
直人 新妻
小俣　猛憲
圭一郎 鈴木
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コニカミノルタ株式会社
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Priority to JP2017543097A priority Critical patent/JPWO2017056977A1/ja
Publication of WO2017056977A1 publication Critical patent/WO2017056977A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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

Definitions

  • the present invention relates to a method for manufacturing a touch panel sensor and a touch panel sensor, and more particularly to a method for manufacturing a touch panel sensor and a touch panel sensor capable of both preventing bone appearance and preventing moire.
  • Display devices equipped with a touch panel that inputs information by bringing a user's finger or pen into contact with the display screen are used in mobile electronic devices such as portable terminals, various home appliances, automatic teller machines, etc. Yes.
  • a resistance film method for detecting a change in resistance value of a touched part As such a touch panel, a capacitance method for detecting a change in capacitance, a photosensor method for detecting a change in light amount, or the like is known.
  • the capacitance method is rapidly spreading in mobile electronic devices and the like because multi-input is relatively easy.
  • a capacitive touch panel includes a plurality of X electrodes arranged in parallel on one surface of a transparent substrate and a plurality of Y electrodes arranged in parallel on the other surface of the transparent substrate.
  • the position coordinates on the touch panel can be detected by using the induced current generated in accordance with the change in capacitance based on electrostatic coupling between the X electrode and the Y electrode and the human finger.
  • Patent Document 1 uses a straight conductive thin wire as the conductive thin wire constituting the transparent conductive film. Since the electrical resistance of the conductive thin wire is proportional to the length, considering the conductivity of the transparent conductive film, it is not possible to use a straight line connecting the one end to the other end of the conductive thin wire, that is, a straight conductive thin wire. It is advantageous.
  • Bone appearance means that streaks derived from the conductive thin wires constituting the X electrode and the Y electrode are visually recognized. Bone appearance may occur due to optical interference between the conductive thin wires constituting the X electrode and the Y electrode, even when the conductive thin wires themselves have a thinness that is difficult to visually recognize.
  • Moire is a streak resulting from the combination of conductive thin wires constituting the X and Y electrodes and other elements in the device when a transparent substrate provided with X and Y electrodes is incorporated into the device. Is to be visually recognized. Moire can be caused by, for example, optical interference between the conductive thin wires forming the X electrode and the Y electrode and the pixel array included in the image display element in the device.
  • Preventing bone appearance and moire brings about an effect such that, for example, when an image display element is disposed on the back surface of the touch panel sensor, the image on the back surface can be recognized more clearly.
  • an object of the present invention is to provide a method for manufacturing a touch panel sensor and a touch panel sensor that can achieve both bone-blocking prevention and moire prevention.
  • the touch panel sensor manufacturing method 2, wherein the zigzag element is formed such that a zigzag meandering width is smaller than a half cycle length of the zigzag. 4).
  • the conductive thin wire is formed of a thin wire made of a wavy element. 5).
  • the wavy element is formed such that a wavy line meandering width is smaller than a half cycle length of the wavy line. 6). 6.
  • the X electrode composed of the conductive thin wire is formed on one surface of the transparent substrate having a single layer structure, and the Y electrode composed of the conductive thin wire is formed on the other surface of the transparent substrate.
  • the X electrode constituted by the conductive thin wires is formed on the surface of the transparent base material arranged on the surface side, and among the transparent base materials of the laminated structure, On the back surface of the transparent substrate disposed on the back surface side, the Y electrode composed of the conductive thin wires is formed, and the transparent substrate on which the X electrode is formed and the transparent on which the Y electrode is formed 8.
  • the conductive thin wire is a touch panel sensor that is a non-linear conductive thin wire. 12 12.
  • the touch panel sensor according to 11, wherein the non-linear conductive thin wire is a thin wire made of a zigzag element. 13.
  • the touch panel sensor according to 12, wherein the zigzag element has a zigzag meandering width smaller than a 1/2 cycle length of the zigzag. 14 12.
  • the touch panel sensor according to 11, wherein the non-linear conductive thin wire is a thin wire made of a wavy element. 15.
  • the transparent base material has a single-layer structure, and includes the X electrode constituted by the conductive thin wire on one surface of the transparent base material, and the previous period Y constituted by the conductive thin wire on the other surface of the transparent base material. 18.
  • the transparent base material has a laminated structure, and the surface of the transparent base material located on the surface side of the transparent base material is provided with the X electrode constituted by the conductive thin wires, and on the back side of the transparent base material. On the back surface of the transparent base material positioned, the transparent electrode provided with the X electrode and the transparent base material provided with the X electrode is adhered to the back surface of the transparent base material. 18.
  • the figure explaining the non-linear conductive thin wire which consists of a zigzag-like element The figure explaining an example of the touch panel sensor obtained by the manufacturing method of the touch panel sensor which concerns on a 2nd aspect.
  • the figure explaining the non-linear conductive thin wire which consists of wavy elements
  • the figure explaining the regularity and irregularity of the shape of a non-linear conductive thin wire The figure explaining a conductive bridge line
  • the perspective view which shows an example of the pair of electroconductive fine wire formed from one line-shaped liquid
  • the figure explaining the layer composition of a transparent substrate The figure explaining the pattern of an Example (sample 1)
  • the figure explaining the pattern of a comparative example (sample 2)
  • an X electrode composed of conductive thin wires is formed on one surface of a transparent substrate, and a Y electrode composed of conductive thin wires is formed on the other surface of the transparent substrate.
  • a conductive thin wire a line-shaped liquid is applied to the transparent base material by an ink jet method using an ink containing a conductive material, and as the line-shaped liquid is dried, the conductive material in the ink is removed.
  • the non-linear conductive thin wire is formed by selectively depositing on both edges of the line liquid.
  • the non-linear conductive thin wire includes an inclined line element that is inclined with respect to the direction connecting the one end to the other end of the non-linear conductive thin wire in the shortest distance.
  • the inclined line element can be constituted by a straight line or a curved line. Further, by combining a plurality of inclined line elements, for example, an element such as a zigzag element or a wavy line element that repeatedly meanders to the left and right with respect to the longitudinal direction of the conductive thin line can be configured.
  • the non-linear conductive thin wire is formed of a zigzag-like element in the first embodiment and a case where the non-linear conductive thin wire is formed of a wavy-line element will be described in the second embodiment.
  • the touch panel sensor has a plurality of strip-shaped X electrodes 2 arranged in parallel in the X-axis direction at a predetermined interval on one surface of a sheet-like transparent substrate 1, and a strip-shaped Y electrode 3 on the other surface at a predetermined interval in the Y-axis. A plurality are arranged in parallel in the direction.
  • the X-axis direction and the Y-axis direction are in a crossing relationship with each other.
  • the X electrode 2 and the Y electrode 3 intersect each other with an interval corresponding to the thickness of the transparent substrate 1.
  • the X electrode 2 and the Y electrode 3 are insulated from each other by the transparent substrate 1.
  • X electrode 2 and Y electrode 3 can be connected to a control circuit, respectively, and can be suitably used as, for example, a capacitive touch panel sensor.
  • a capacitive touch panel during operation, an induced current based on a change in capacitance that occurs when a user's finger or conductor approaches or comes into contact with the X electrode 2 and the Y electrode 3 is used. The position coordinates of a finger or a conductor can be detected.
  • One X electrode 2 is composed of an assembly of conductive thin wires 21.
  • a plurality of conductive thin wires 21 constituting one X electrode 2 are connected to a control circuit (not shown) via a collecting wire 22.
  • One Y electrode 3 is also constituted by an assembly of conductive thin wires 31.
  • a plurality of conductive thin wires 31 constituting one Y electrode 3 are connected to a control circuit (not shown) via a collector line 32.
  • the conductive thin wires 21 and 31 included in the X electrode 2 and the Y electrode 3 are respectively formed into the line shape as the line liquid containing the conductive material applied to the transparent substrate 1 is dried. It is composed of non-linear conductive thin wires formed by selectively depositing on both edges of the liquid. In this embodiment, the non-linear conductive thin wire is composed of a zigzag element.
  • the non-linear conductive thin wire 21 constituting the X electrode 2 is formed in the forming direction of the non-linear conductive thin wire 21 as a whole (or the direction connecting the one end to the other end of the non-linear conductive thin wire 21 in the shortest direction. ) Are formed along the longitudinal direction of the X electrode 2.
  • the non-linear conductive thin wire 31 constituting the Y electrode 3 is formed in the shortest direction from one end to the other end of the non-linear conductive thin wire 31 as a whole (or from one end to the other end of the non-linear conductive thin wire 31). Is formed along the longitudinal direction of the Y electrode 3.
  • the manufacturing method of the touch panel sensor will be described in detail with reference to FIG.
  • the electroconductive fine wire 21 which mainly comprises the X electrode 2
  • the electroconductive fine wire 31 which comprises a Y electrode can also be used.
  • a plurality of line-like liquids 4 containing a conductive material are applied on the transparent substrate 1.
  • the line-like liquid 4 is applied in a zigzag shape.
  • a thin wire pair 23 composed of a pair of conductive thin wires 21 and 21 as shown in FIG.
  • the edge of the liquid can be fixed at an early stage, and the difference in evaporation amount between the liquid central portion and the edge can be increased. This can facilitate the formation of a flow that carries the conductive material to the edge.
  • the application of the line-like liquid 4 on the transparent substrate 1 can be performed by an ink jet method. Specifically, while moving an inkjet head provided in a droplet ejection device (not shown) relative to the substrate, ink containing a conductive material is ejected from the nozzle of the inkjet head, and the ejected ink droplet is placed on the substrate. , The line-shaped liquid 4 having a desired shape can be applied.
  • the droplet discharge method of the inkjet head is not particularly limited, and for example, a piezo method or a thermal method can be used.
  • the plurality of conductive thin wires 21 constituting the X electrode 2 are arranged side by side without crossing each other, and the plurality of conductive thin wires 31 constituting the Y electrode 3 are also spaced without crossing each other. Are placed side by side.
  • the aperture ratio (the ratio of the region where the conductive fine lines are not formed) can be increased as compared with the electrode formed by intersecting the conductive thin lines in a lattice shape. Since it is excellent in performance, it has the effect of preventing the appearance of bones. Further, from the viewpoint of the resistance value, the conductive thin wire formed by using the coffee stain phenomenon is less likely to cause disconnection, so that variation in resistance between terminals can be reduced.
  • the zigzag element preferably has a zigzag meandering width smaller than a 1/2 cycle length of the zigzag.
  • ⁇ is a half cycle length of the zigzag, and is half the length of one cycle connecting the peaks and peaks or the valleys and valleys of the zigzag along the entire zigzag formation direction.
  • ⁇ is the zigzag meandering width, and is the zigzag meandering width in a direction perpendicular to the forming direction of the zigzag as a whole.
  • the zigzag 1 ⁇ 2 period length ⁇ is preferably in the range of 100 ⁇ m to 2 mm, and more preferably in the range of 100 to 500 ⁇ m.
  • the meandering width ⁇ of the zigzag is preferably in the range of 100 ⁇ m to 1 mm, and more preferably in the range of 100 to 500 ⁇ m.
  • the fine wire interval ⁇ when a plurality of conductive thin wires 21 made of zigzag elements are arranged side by side is not particularly limited, but ⁇ / ⁇ is preferably 3 or more in relation to the zigzag 1 ⁇ 2 period length ⁇ . Thereby, the effect of the present invention is more remarkably exhibited.
  • ⁇ / ⁇ is particularly preferably 3 or more and less than 20.
  • the thin wire interval ⁇ is a space between the conductive thin wires 21 in a direction orthogonal to the forming direction of the entire zigzag.
  • a touch panel sensor is manufactured in which the conductive thin wires 21 and 31 included in the X electrode 2 and the Y electrode 3 are composed of non-linear conductive thin wires made of wavy elements.
  • the non-linear conductive thin wires 21 and 31 made of a wavy element can be formed by applying the line-like liquid described in the first embodiment in a wavy line.
  • the conductive thin wires 21 and 31 having the wavy element are rounded and meandering.
  • a curved line like a sine wave or a combination of a straight line and a curved line like a wavy line with rounded corners of a zigzag can be preferably used.
  • the wavy element has a wavy line meandering width smaller than a half cycle length of the wavy line.
  • ⁇ ′ is a half cycle length of the wavy line, and is half the length of one cycle connecting the peaks and peaks of the wavy lines or the valleys and valleys along the forming direction of the entire wavy line. is there.
  • ⁇ ′ is the meandering width of the wavy line, and is the width of the meandering of the wavy line in the direction perpendicular to the forming direction of the entire wavy line.
  • the meandering width ⁇ ′ of the wavy line is smaller than the half period length ⁇ ′ of the wavy line, the resistance of the obtained pattern can be reduced, and the effect of further preventing the appearance of bone can be obtained. This effect is more prominent when the ⁇ ′ / ⁇ ′ ratio is in the range of 1.1 to 4.
  • the half cycle length ⁇ ′ of the wavy line is preferably in the range of 100 ⁇ m to 2 mm, and more preferably in the range of 100 to 500 ⁇ m.
  • the meandering width ⁇ ′ of the wavy line is preferably in the range of 100 ⁇ m to 1 mm, and more preferably in the range of 100 to 500 ⁇ m.
  • ⁇ ′ is 3 or more in relation to the half period length ⁇ ′ of the wavy wire. It is preferable. Thereby, the effect of the present invention is more remarkably exhibited.
  • ⁇ ′ / ⁇ ′ is particularly preferably 3 or more and less than 20.
  • the thin wire interval ⁇ ′ is a space between the conductive thin wires 21 in a direction orthogonal to the forming direction of the entire wavy line.
  • the non-linear conductive thin wire As described above, as the non-linear conductive thin wire, the first embodiment is exemplified by the zigzag-like element, and the second embodiment is constituted by the wavy-line element.
  • the non-linear conductive thin wire is constituted by the zig-zag-like element. Is particularly preferred.
  • the non-linear conductive thin wire composed of zigzag-shaped elements formed from zigzag line-shaped liquid is compared with the non-linear conductive thin wire composed of wavy-line elements formed from wavy line-shaped liquid. And become more stable. Therefore, when the non-linear conductive thin wire is formed of zigzag-like elements, the effect of reducing the resistance of the pattern, preventing the appearance of bones, and preventing moire becomes remarkable.
  • the shape of the non-linear conductive thin wire may or may not have regularity.
  • regularity and irregularity of the shape of the non-linear conductive thin wire will be described with reference to FIGS. 6 (a) to (c).
  • the zigzag elements in one conductive thin wire 21 have regularity, and the zigzag elements in the plurality of conductive thin wires 21 also have regularity. That is, in one conductive thin wire 21, the zigzag half cycle length ⁇ and the zigzag meandering width ⁇ are kept constant. This regularity is maintained in common between the adjacent conductive thin wires 21. That is, the adjacent conductive thin wires 21 have shapes that can be overlapped with each other by parallel movement. The interval between adjacent conductive thin wires 21 is constant.
  • the zigzag element in one conductive thin wire 21 does not have regularity, but the zigzag element between the plurality of conductive thin wires 21 has regularity. That is, in one conductive thin wire 21, the zigzag meandering width is constant, but the zigzag 1 ⁇ 2 period length varies and is irregular. On the other hand, when viewed between adjacent conductive thin wires 21, this irregularity is maintained in common and has regularity. That is, the adjacent conductive thin wires 21 have shapes that can be overlapped with each other by parallel movement. The interval between adjacent conductive thin wires 21 is constant.
  • the zigzag element in one conductive thin wire 21 does not have regularity, and the zigzag element in the plurality of conductive thin wires 21 does not have regularity. . That is, in one conductive thin wire 21, the zigzag meandering width is constant, but the zigzag 1 ⁇ 2 period length varies and is irregular. On the other hand, there is regularity between adjacent pairs of conductive thin wires 21 formed from one line-shaped liquid between adjacent conductive thin wires 21, but conductivity formed from other line-shaped liquids. There is no regularity with respect to the thin wire 21. That is, the adjacent conductive fine wires 21 and 21 have a shape that cannot be overlapped with each other by parallel movement.
  • the spacing between adjacent conductive thin wires 21 is not uniform.
  • interval between adjacent electroconductive thin wires 21 and 21 becomes non-uniform
  • interval ⁇ is in the direction orthogonal to the formation direction as the whole zigzag line. A value at a portion where the interval between the conductive thin wires 21 is the smallest is taken.
  • FIGS. 6A to 6C are all preferable, but from the viewpoint of further improving the moire prevention, the example of FIG. 6C is the best, and then FIG. 6B. This is the order of the example of FIG. 6A. In other words, the more the conductive thin wires are irregular, the easier it is to obtain moiré prevention.
  • each conductive thin wire 21 it is preferable to have regularity between adjacent conductive thin wires 21. That is, having regularity between adjacent conductive thin wires 21 also means having regularity between adjacent line-like liquids provided on the transparent substrate 1 in order to form these.
  • regularity has been described by giving an example of a zigzag element, but it can also be used in the case of a wavy element.
  • the meandering width may be varied, but it is preferable that the meandering width is constant and the 1 ⁇ 2 period length is varied to impart irregularity. Furthermore, it is also preferable to provide irregularity within the range of preferable conditions described for ⁇ and ⁇ (or ⁇ ′ and ⁇ ′).
  • the Y electrode 3 is arranged via the transparent base material 1 with respect to the X electrode 2 provided on the user side during use, the visibility of the X electrode 2 is caused by, for example, a difference in optical path length. Tends to be higher than the visibility of the Y electrode 3. Therefore, it is preferable to make the shapes of the conductive thin wires 21 and 31 different between the X electrode 2 and the Y electrode 3 so as to reduce the difference in visibility.
  • the conductive fine wire 31 constituting the Y electrode 3 is formed so as to be longer than a half cycle length. Thereby, since the area occupied by the formation region of the conductive thin wire 21 constituting the X electrode 2 is smaller than that of the conductive thin wire 31 constituting the Y electrode 3, the visibility of the X electrode 2 is lowered and the Y electrode is reduced. 3 visibility can be approached. From the same point of view, it is preferable that the meandering width of the conductive fine wire 21 constituting the X electrode 2 is smaller than the meandering width of the conductive fine wire 31 constituting the Y electrode 3.
  • the conductive thin wire 21 constituting the X electrode 2 is more easily recognized by the edge than the conductive thin wire 31 constituting the Y electrode 3, a wavy element is provided on the conductive thin wire 21 constituting the X electrode 2. It is also preferable to provide a zigzag element to the conductive thin wire 31 constituting the Y electrode 3 to reduce the difference in edge visibility.
  • the conductive thin wire 21 is connected by a conductive bridge wire 24 in one X electrode 2.
  • the conductive thin wire 21 constituting the X electrode 2 will be described, but this description can also be applied to the conductive thin wire 31 constituting the Y electrode 3.
  • the conductivity of the X electrode 2 can be ensured more reliably, and the detection sensitivity of the touch panel sensor can be further improved.
  • the method for forming the conductive cross-linking line 24 is not particularly limited, but after forming the conductive thin line 21, the ink containing the conductive material is formed in dots or lines by, for example, an inkjet method so as to straddle the plurality of conductive thin lines 21. It is preferable to form it by giving it to the shape and drying it. Furthermore, it is particularly preferable to form the conductive cross-linked line 24 formed by the coffee stain phenomenon from the viewpoint of preventing the conductive cross-linked line 24 from being visually recognized. In the illustrated example, a pair of conductive thin wires formed by the coffee stain phenomenon is used as the conductive bridging wires 24 and 24.
  • one conductive bridge line 24 connects two adjacent conductive thin lines 21 and 21, but three or more conductive thin lines are connected by one conductive bridge line. You may connect between.
  • a plurality of conductive thin wires constituting one X electrode 2 are electrically connected to each other at the other end opposite to one end of the conductive thin wires 21 connected to the collector line 22.
  • a membrane 25 is provided. Thereby, the conductivity of the X electrode 2 can be ensured more reliably.
  • the conductive film 25 is preferably disposed outside the image display frame when the touch panel sensor is incorporated into the device.
  • the conductive thin wires 21 and 31 constituting one or both of the X electrode 2 and the Y electrode 3 include a metal film formed by plating.
  • the plating method is not particularly limited, but electroless plating and electrolytic plating can be preferably exemplified, and electrolytic plating is particularly preferable. Suitable electroplating can be performed using the conductivity of the conductive thin wire.
  • the plating metal is not particularly limited, for example, silver, copper, nickel and the like can be preferably exemplified. It is also preferable to apply a plurality of plating processes with different plating metals to the conductive thin wires. That is, it is preferable to laminate a plurality of metal layers on the conductive thin wire. For example, a conductive thin wire made of silver is first subjected to electrolytic copper plating to form a copper film, and then subjected to electrolytic nickel plating to form a nickel layer, so that the conductive thin wire has high conductivity and durability. Can be granted.
  • the non-linear conductive thin wire is mainly composed of the zigzag element or the wavy line element
  • the present invention is not limited to this, and the other end of the non-linear conductive thin wire is changed to the other.
  • Any material can be preferably used as long as it is composed of inclined line elements that are inclined with respect to the direction connecting the ends to the shortest.
  • the inclined line element can be constituted by a straight line or a curved line. Further, by combining a plurality of inclined line elements, for example, an element that repeatedly meanders to the left and right with respect to the longitudinal direction of the conductive thin line, such as a zigzag element or a wavy line element, can be configured.
  • the ratio of the length of the inclined line element to the length of the line constituting one non-linear conductive thin wire is larger, preferably 50% or more, more preferably 80% or more. , Most preferably 100% is constituted by inclined line elements. As in the examples of zigzag elements and wavy line elements illustrated above, it is particularly preferable that the entire length of the non-linear conductive thin wire is constituted by the inclined line element.
  • the non-linear conductive fine wire constituting the X electrode is formed in the formation direction of the non-linear conductive thin wire (or the non-linear conductive wire).
  • the direction in which the other end of the thin thin wire is linearly connected to the other end is preferably formed along the longitudinal direction of the X electrode.
  • the inclined line element included in the non-linear conductive thin wire is preferably inclined with respect to the longitudinal direction of the X electrode, and further inclined with respect to the longitudinal direction of the Y electrode. preferable. Thereby, the effect of preventing moire becomes remarkable.
  • the non-linear conductive fine wire constituting the Y electrode is formed as the whole non-linear conductive thin wire (or the direction in which one end of the non-linear conductive thin wire is linearly connected). Is preferably formed along the longitudinal direction of the Y electrode.
  • the inclined line element included in the non-linear conductive thin wire is preferably inclined with respect to the longitudinal direction of the Y electrode, and further inclined with respect to the longitudinal direction of the X electrode. preferable. Thereby, the effect of preventing moire becomes remarkable.
  • non-linear conductive thin wire slant line element constituting the X electrode and the non-linear thin conductive wire slant line element constituting the Y electrode may be formed in a direction crossing each other. preferable. Thereby, the effect of preventing the appearance of bone becomes remarkable.
  • the conductive thin wires constituting the X electrode and the Y electrode are non-linear conductive thin wires.
  • the effect of the present invention is obtained when all the conductive thin wires are non-linear conductive thin wires. Becomes more prominent.
  • Linear liquid containing conductive material Preferred examples of the conductive material contained in the line liquid include conductive fine particles and conductive polymers.
  • the conductive fine particles are not particularly limited, but Au, Pt, Ag, Cu, Ni, Cr, Rh, Pd, Zn, Co, Mo, Ru, W, Os, Ir, Fe, Mn, Ge, Sn, Ga, Fine particles such as In can be preferably exemplified, and among them, it is preferable to use fine metal particles such as Au, Ag, and Cu because they can form thin wires having low electric resistance and strong against corrosion. From the viewpoint of cost and stability, metal fine particles containing Ag are most preferable.
  • the average particle diameter of these metal fine particles is preferably in the range of 1 to 100 nm, more preferably in the range of 3 to 50 nm.
  • carbon fine particles are used as the conductive fine particles.
  • the carbon fine particles include graphite fine particles, carbon nanotubes, fullerenes and the like.
  • the conductive polymer is not particularly limited, but a ⁇ -conjugated conductive polymer can be preferably exemplified.
  • Examples of the ⁇ -conjugated conductive polymer include polythiophenes, polypyrroles, polyindoles, polycarbazoles, polyanilines, polyacetylenes, polyfurans, polyparaphenylenes, polyparaphenylene vinylenes, polyparaphenylene sulfide.
  • Chain conductive polymers such as polyazenes, polyazulenes, polyisothianaphthenes, and polythiazyl compounds can be used.
  • polythiophenes and polyanilines are preferable in that high conductivity can be obtained. Most preferred is polyethylene dioxythiophene.
  • the conductive polymer more preferably comprises the above-described ⁇ -conjugated conductive polymer and polyanion.
  • a conductive polymer can be easily produced by chemical oxidative polymerization of a precursor monomer that forms a ⁇ -conjugated conductive polymer in the presence of an appropriate oxidizing agent, an oxidation catalyst, and a polyanion.
  • a commercially available material can be preferably used as the conductive polymer.
  • a conductive polymer (abbreviated as PEDOT / PSS) made of poly (3,4-ethylenedioxythiophene) and polystyrene sulfonic acid is used in H.264. C. It is commercially available from Starck as the “CLEVIOS series”, from Aldrich as “PEDOT-PASS 483095, 560598” and from Nagase Chemtex as the “Dentron series”. Polyaniline is also commercially available from Nissan Chemical Company as “ORMECON series”.
  • the content of the conductive material in the line liquid provided on the transparent substrate is preferably in the range of 0.01% by weight to 1% by weight with respect to the total amount of the line liquid.
  • the content rate is a value before being dried immediately after the linear liquid is applied on the transparent substrate.
  • the liquid (ink) containing the conductive material for example, one kind or a combination of two or more kinds such as water and an organic solvent can be used.
  • the organic solvent is not particularly limited.
  • alcohols such as 1,2-hexanediol, 2-methyl-2,4-pentanediol, 1,3-butanediol, 1,4-butanediol, propylene glycol
  • ethers such as diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, dipropylene glycol monomethyl ether, and dipropylene glycol monoethyl ether.
  • the liquid (ink) containing the conductive material may contain various additives such as a surfactant as long as the effects of the present invention are not impaired.
  • a surfactant By using a surfactant, it is possible to stabilize the discharge by adjusting the surface tension etc. when forming a line liquid on a transparent substrate using a droplet discharge device. Become.
  • the surfactant is not particularly limited, but a silicon surfactant or the like can be used.
  • Silicon-based surfactants are those in which the side chain or terminal of dimethylpolysiloxane is polyether-modified, such as “KF-351A”, “KF-642” manufactured by Shin-Etsu Chemical Co., “BYK347” manufactured by Big Chemie, “BYK348” and the like are commercially available.
  • the content of the surfactant is preferably 1% by weight or less with respect to the total amount of the liquid.
  • FIG. 8 is a perspective view schematically showing a thin wire pair 23 composed of conductive thin wires 21 and 21 formed from one line-shaped liquid.
  • the conductive thin wire 21 constituting the X electrode 2 will be mainly described, but this description can also be applied to the conductive thin wire 31 constituting the Y electrode 3.
  • FIG. 8 shows a part of the thin wire pair 23 of the non-linear conductive thin wires 21 and 21 and is merely shown in a straight line for convenience.
  • the range of the arrangement interval I of the conductive thin wires 21 and 21 is not particularly limited, and is preferably in the range of 10 ⁇ m to 1000 ⁇ m, more preferably in the range of 10 ⁇ m to 500 ⁇ m, and more preferably in the range of 10 ⁇ m to 300 ⁇ m. The following range is most preferable.
  • interval I of the electroconductive fine wires 21 and 21 is a distance between each largest protrusion part of the electroconductive thin wires 21 and 21, and is decided corresponding to the line
  • the arrangement interval I may be, for example, a large arrangement interval of 50 ⁇ m or more, 100 ⁇ m or more, 200 ⁇ m or more, 300 ⁇ m or more, 400 ⁇ m or more, 500 ⁇ m or more, or even 1 mm or more.
  • interval I is not specifically limited, It is preferable that it is 5 mm or less, and it is preferable that it is 1 mm or less.
  • the conductive thin wires 21 may be arranged in parallel at an interval larger than the arrangement interval I of the thin wire pairs 23 formed by the coffee stain phenomenon. This is preferable.
  • the conductive fine wires 21 and 21 constituting the fine wire pair 23 do not necessarily have to be islands completely independent from each other. As shown in the drawing, the conductive thin wires 21 and 21 are connected by the thin film portion 20 formed between the conductive thin wires 21 and 21 at a height lower than the height of the conductive thin wires 21 and 21. It is also preferable that it is formed as a continuous body. From the viewpoint of further improving the thinning of the thin wire pair 23, the height Z of the thinnest portion where the thickness of the functional material is the thinnest between the conductive thin wires 21, 21, specifically, the thinnest portion of the thin film portion 20 The height Z is preferably in the range of 10 nm or less. Most preferably, in order to achieve a balance between transparency and stability, the thin film portion 20 is provided in the range of 0 ⁇ Z ⁇ 10 nm.
  • the line widths W1 and W2 of the conductive thin wires 21 and 21 of the fine wire pair 23 are preferably 10 ⁇ m or less, respectively. If it is 10 micrometers or less, since it will be a level which cannot be visually recognized normally, it is more preferable from a viewpoint of improving transparency. Considering the stability of each conductive thin wire 21, 21, 21, the width W1, W2 of each conductive thin wire 21, 21 is preferably in the range of 2 ⁇ m or more and 10 ⁇ m or less.
  • the widths W1 and W2 of the thin conductive wires 21 and 21 are defined as Z, which is the height of the thinnest portion where the thickness of the functional material is the thinnest between the thin conductive wires 21 and 21.
  • the width of the conductive thin wires 21 and 21 at half the height of Y1 and Y2 is set.
  • the height of the thinnest portion in the thin film portion 20 can be set to Z.
  • the line widths W1 and W2 of the conductive thin wires 21 and 21 are conductive from the surface of the transparent substrate 1. The widths of the conductive thin wires 21 and 21 at half the heights H1 and H2 of the thin conductive wires 21 and 21 are used.
  • the line widths W1 and W2 of the conductive thin wires 21 and 21 constituting the thin wire pair 23 are extremely thin as described above, from the viewpoint of securing a cross-sectional area and reducing resistance, from the surface of the transparent substrate 1 It is desirable that the heights H1 and H2 of the conductive thin wires 21 and 21 be higher. Specifically, the heights H1 and H2 of the conductive thin wires 21 and 21 are preferably in the range of 50 nm to 5 ⁇ m. Furthermore, from the viewpoint of improving the stability of the thin wire pair 23, the H1 / W1 ratio and the H2 / W2 ratio are preferably in the range of 0.01 or more and 1 or less, respectively.
  • the H1 / Z ratio and the H2 / Z ratio are each preferably 5 or more, more preferably 10 or more, and preferably 20 or more. Particularly preferred.
  • the transparent substrate 1 is not particularly limited, and examples thereof include glass and plastic. Among these, plastic is preferable. As the plastic, polyethylene terephthalate (abbreviated as PET), polybutylene terephthalate, polyethylene, polypropylene, acrylic, polyester, polyamide, polycarbonate, and the like are preferable.
  • PET polyethylene terephthalate
  • PET polybutylene terephthalate
  • polyethylene polyethylene
  • polypropylene polyethylene
  • acrylic acrylic
  • polyester polyamide
  • polycarbonate polycarbonate
  • the present invention has high versatility of the base material, and can form a transparent conductive film suitably for a base material made of plastic. Therefore, the touch panel sensor which has flexibility can be manufactured suitably using the flexibility of plastic.
  • the touch panel sensor having flexibility can be used by being curved in accordance with a three-dimensional shape such as a three-dimensional structure, a human body, or an animal body. Moreover, since it can be rounded and made compact, it is advantageous for storage. Therefore, for example, it can be suitably used as a touch panel sensor mounted on a portable terminal, particularly a wearable terminal.
  • the transparent substrate 1 may have a single layer structure or a laminated structure.
  • the layer structure of the transparent substrate 1 will be described with reference to FIG.
  • FIG. 9A shows an example in which the transparent substrate 1 has a single layer structure.
  • the X electrode 2 is formed on one surface of the transparent substrate 1 and then the Y electrode 3 is formed on the other surface, or the Y electrode 3 is formed on one surface of the transparent substrate 1 and then the other surface.
  • a touch panel sensor is obtained. That is, a touch panel sensor in which the X electrode 2 and the Y electrode 3 are formed on both surfaces of a single transparent substrate is obtained.
  • FIG. 9B shows an example when the transparent substrate 2 has a laminated structure.
  • a laminated structure is composed of two transparent substrates 11 and 11 and an adhesive film 12 disposed between the transparent substrates 11 and 11.
  • the X electrode 2 is formed on the first transparent base material 11 and the Y electrode 3 is formed on the second transparent base material 11.
  • a touch panel sensor is obtained by bonding the transparent base material 11 together. At the time of bonding, as shown in the drawing, it is preferable to bond them by interposing a transparent adhesive film 12 or the like.
  • Example 1 Production of touch panel sensor (1) Production of sample 1 Using an inkjet head (Konica Minolta, piezo head (standard droplet volume 42 pl)), silver nanoparticle-containing ink is ejected onto a PET film (thickness 50 ⁇ m). A plurality of zigzag line-shaped liquids were formed on the film. The line-shaped liquid is dried, silver nanoparticles are selectively deposited on both edges of the line-shaped liquid, and a non-linear conductive thin line consisting of zigzag-like elements with a line width of 5 ⁇ m and a fine line interval ( ⁇ ) of 200 ⁇ m. A plurality of was formed. The pattern of the formed conductive fine wire is shown in FIG.
  • Sample 1 was obtained by stacking and bonding the two films so that the conductive fine wire forming surface was arranged on the front side so that the formation direction of the conductive fine wires intersected at 90 °.
  • the conductive pattern after bonding is shown in FIG.
  • Bone visibility prevention 10 samples were prepared for each of samples 1 to 3, and the bone visibility prevention was evaluated according to the following evaluation criteria, and an average of 10 samples was obtained.
  • the conductive thin wire constituting the conductive pattern dries the line-shaped liquid containing the conductive material applied to the transparent substrate, and the conductive material is placed on both edges of the line-shaped liquid. It can be seen that by comprising non-linear conductive fine wires formed by selective deposition, it is possible to suitably achieve both bone-viewing prevention and moire prevention.
  • Example 2 Fabrication of Touch Panel Sensor
  • the zigzag half cycle length ⁇ and the zigzag meandering width ⁇ are as shown in Table 2. Samples 4 to 7 which were changed to were prepared.
  • ⁇ is the zigzag 1 ⁇ 2 period length
  • ⁇ is the zigzag meandering width
  • ⁇ is the fine line interval
  • Evaluation Table 2 shows that the zigzag meandering width ⁇ is smaller than the zigzag 1 ⁇ 2 period length ⁇ , so that the resistance between terminals can be reduced and the effect of preventing the appearance of bones is also increased.
  • Example 3 In the preparation of Sample 1 of Example 1, the regularity of the conductive thin wires was varied to obtain Samples 8 to 10 corresponding to FIGS. 6 (a) to 6 (c).
  • Sample 8 corresponds to FIG. 6 (a), has regularity in the zigzag-like element in one non-linear conductive thin wire, and between a plurality of non-linear conductive thin wires. Zigzag elements also have regularity.
  • the sample 9 corresponds to FIG. 6B, and the zigzag element in one non-linear conductive thin wire does not have regularity, but between a plurality of non-linear conductive thin wires. There is regularity in the zigzag-like element in.
  • the sample 10 corresponds to FIG. 6C, and the zigzag in one non-linear conductive thin wire does not have regularity, and the zigzag between a plurality of non-linear conductive thin wires. Has no regularity.
  • Sample 8 to 10 were evaluated for moiré prevention in the same manner as in Example 1. Sample 10 was the best, followed by Sample 9 and Sample 8. From this result, it can be seen that the more the non-linear conductive fine wires are irregular, the easier it is to obtain moiré prevention.

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Abstract

Le problème décrit par la présente invention est de fournir un procédé de fabrication d'un capteur de panneau tactile qui peut empêcher à la fois une visibilité de motif et des moirages, et de fournir le capteur de panneau tactile. Le problème est résolu, lorsque des électrodes X (2), comprenant des fils conducteurs (21) sont formées sur une surface d'un substrat transparent (1) et des électrodes Y (3) comprenant des fils conducteurs (31) sont formées sur l'autre surface du substrat transparent (1), par application d'un liquide en forme de ligne sur le substrat transparent (1) à l'aide d'une encre contenant un matériau conducteur au moyen d'un procédé à jet d'encre, et par dépôt sélectif du matériau conducteur dans l'encre au niveau des deux bords du liquide en forme de ligne tandis que le liquide en forme de ligne est en cours de séchage, formant ainsi les fils conducteurs non linéaires (21, 31).
PCT/JP2016/077023 2015-09-29 2016-09-13 Procédé de fabrication d'un capteur de panneau tactile et capteur de panneau tactile WO2017056977A1 (fr)

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Cited By (2)

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EP3477448A1 (fr) * 2017-10-30 2019-05-01 VTS-Touchsensor Co., Ltd. Panneau tactile et dispositif d'affichage
CN110869896A (zh) * 2017-07-05 2020-03-06 积水保力马科技株式会社 静电电容式触控面板

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WO2013039050A1 (fr) * 2011-09-13 2013-03-21 グンゼ株式会社 Écran tactile
JP2013058180A (ja) * 2011-09-08 2013-03-28 Samsung Electro-Mechanics Co Ltd タッチパネル
US20140209355A1 (en) * 2013-01-28 2014-07-31 John Andrew Lebens Large-current micro-wire pattern
JP2014164733A (ja) * 2013-02-28 2014-09-08 Mitsubishi Electric Corp タッチスクリーン、タッチパネル及びそれを備える表示装置
JP3197225U (ja) * 2014-12-04 2015-04-30 介面光電股▲ふん▼有限公司ＪＴＯＵＣＨ Ｃｏｒｐｏｒａｔｉｏｎ タッチパネル及びその検出電極
JP2015115021A (ja) * 2013-12-16 2015-06-22 株式会社ジャパンディスプレイ タッチ検出機能付き表示装置及び電子機器

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JP2013058180A (ja) * 2011-09-08 2013-03-28 Samsung Electro-Mechanics Co Ltd タッチパネル
WO2013039050A1 (fr) * 2011-09-13 2013-03-21 グンゼ株式会社 Écran tactile
US20140209355A1 (en) * 2013-01-28 2014-07-31 John Andrew Lebens Large-current micro-wire pattern
JP2014164733A (ja) * 2013-02-28 2014-09-08 Mitsubishi Electric Corp タッチスクリーン、タッチパネル及びそれを備える表示装置
JP2015115021A (ja) * 2013-12-16 2015-06-22 株式会社ジャパンディスプレイ タッチ検出機能付き表示装置及び電子機器
JP3197225U (ja) * 2014-12-04 2015-04-30 介面光電股▲ふん▼有限公司ＪＴＯＵＣＨ Ｃｏｒｐｏｒａｔｉｏｎ タッチパネル及びその検出電極

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110869896A (zh) * 2017-07-05 2020-03-06 积水保力马科技株式会社 静电电容式触控面板
CN110869896B (zh) * 2017-07-05 2023-08-11 积水保力马科技株式会社 静电电容式触控面板
EP3477448A1 (fr) * 2017-10-30 2019-05-01 VTS-Touchsensor Co., Ltd. Panneau tactile et dispositif d'affichage
US10551963B2 (en) 2017-10-30 2020-02-04 Vts-Touchsensor Co., Ltd. Touch panel with mesh electrodes to mitigate moire, and display device comprising same

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