WO2017131362A1 - 투명 전극 및 이를 포함하는 전자 장치 - Google Patents

투명 전극 및 이를 포함하는 전자 장치 Download PDF

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Publication number
WO2017131362A1
WO2017131362A1 PCT/KR2017/000334 KR2017000334W WO2017131362A1 WO 2017131362 A1 WO2017131362 A1 WO 2017131362A1 KR 2017000334 W KR2017000334 W KR 2017000334W WO 2017131362 A1 WO2017131362 A1 WO 2017131362A1
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WO
WIPO (PCT)
Prior art keywords
transparent electrode
mesh
length
mesh pattern
pattern
Prior art date
Application number
PCT/KR2017/000334
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English (en)
French (fr)
Korean (ko)
Inventor
이철훈
손동진
유성우
Original Assignee
동우화인켐 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 동우화인켐 주식회사 filed Critical 동우화인켐 주식회사
Priority to CN201780005967.0A priority Critical patent/CN108475557B/zh
Publication of WO2017131362A1 publication Critical patent/WO2017131362A1/ko

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    • 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
    • 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
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/36—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the electrodes

Definitions

  • the present invention relates to a transparent electrode and an electronic device including the same.
  • liquid crystal which have features such as thinning, light weight, and low power consumption Liquid crystal display devices, plasma display panel devices, electroluminescent display devices, and the like have been studied.
  • a touch panel which is an input device attached to the display device and configured to input a user's command by selecting an instruction content displayed on the screen with a human hand or an object, has been in the spotlight.
  • the touch panel is provided at the front face of the display device to convert a contact position in direct contact with a human hand or an object into an electrical signal.
  • the instruction content selected at the contact position is received as an input signal. Since the touch panel can replace a separate input device connected to an image display device such as a keyboard and a mouse, its use range is gradually expanding.
  • ITO indium doped tin oxide
  • the ITO electrode has a problem that the pattern is visually recognized due to the difference in reflectance at the boundary of the electrode.
  • the ITO electrode is a hard material, which is difficult to apply to a flexible display device formed using a flexible material such as a display device including a curved panel that maintains a constant curvature in the display device and plastics. There is this.
  • a vacuum process such as sputtering or chemical vapor deposition is essential for the scarcity of the indium material constituting the ITO and the ITO coating, and thus the manufacturing process cost is relatively high.
  • Korean Patent Publication No. 2013-0116597 discloses a touch screen panel.
  • An object of the present invention is to provide a transparent electrode capable of lowering a resistance, improving signal delay, and enabling a large area.
  • An object of the present invention is to provide an electronic device including the transparent electrode.
  • a transparent electrode including a mesh pattern formed with a predetermined area and satisfying the following Equation 1:
  • X is the width / length of the predetermined area and Y is the length / length of the unit mesh in the mesh pattern.
  • X is the width / length of the predetermined area and Y is the length / length of the unit mesh in the mesh pattern.
  • the vertical length is 100 ⁇ m to 700 ⁇ m transparent electrode.
  • the transparent electrode of claim 1, wherein the mesh pattern is formed of molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, chromium, nickel, tungsten, or an alloy of two or more thereof.
  • the mesh pattern is a transparent electrode comprising a first mesh pattern formed by connecting the unit mesh pattern in the first direction and the unit mesh pattern spaced apart in the second direction.
  • Electronic device comprising the transparent electrode of any one of the above 1 to 7.
  • the electronic device of claim 8 wherein the electronic device is selected from the group consisting of an antenna, a touch sensor, a battery, an image display device, and an imaging device.
  • the transparent electrode of the present invention has a low resistance by minimizing the resistance difference according to the ratio of width and length. As a result, the signal delay is improved and a large area is possible.
  • the transparent electrode of the present invention does not have a delay time due to a signal delay, and thus high speed driving of the electronic device to which the transparent electrode is applied is possible.
  • FIG. 1 is a schematic perspective view of a transparent electrode according to an embodiment of the present invention.
  • FIG. 2 is a schematic plan view of a transparent electrode according to an embodiment of the present invention.
  • FIG 3 is a schematic perspective view showing a portion of a transparent electrode according to an embodiment of the present invention.
  • FIG. 5 to 7 show channel resistance evaluation results of the transparent electrodes of Examples 1 to 3.
  • FIG. 5 to 7 show channel resistance evaluation results of the transparent electrodes of Examples 1 to 3.
  • FIG. 8 to 10 show overall resistance evaluation results of the transparent electrodes of Examples 1 to 3.
  • FIG. 8 to 10 show overall resistance evaluation results of the transparent electrodes of Examples 1 to 3.
  • FIG. 11 shows evaluation results of sheet resistance for each direction of the transparent electrodes of Examples 1 to 3.
  • FIG. 11 shows evaluation results of sheet resistance for each direction of the transparent electrodes of Examples 1 to 3.
  • the present invention includes a mesh pattern formed in a predetermined area, and by satisfying Equation 1, the resistance is low by minimizing the resistance difference according to the horizontal and vertical length ratio, the signal delay can be improved and the large area is applied,
  • the present invention relates to a transparent electrode capable of high-speed driving of irradiation and an electronic device including the same.
  • the transparent electrode of the present invention includes a mesh pattern formed in a predetermined area.
  • the 'transparent electrode' is made of a transparent electrode material such as ITO, and is actually made to a user by being manufactured with a line width that is too small to be discerned by the user even if it is made of not only a transparent electrode but also an opaque material. It means the electrode also including the electrode which looks transparent.
  • the mesh pattern is a mesh pattern, and individual meshes are called unit meshes.
  • the mesh pattern serves as an electrode, and is formed with a predetermined area required for the apparatus to which the transparent electrode of the present invention is applied.
  • the predetermined area may be an area of the display unit.
  • X is the longitudinal sheet resistance / horizontal sheet resistance of the transparent electrode
  • Y is the horizontal length / length of the unit mesh in the mesh pattern
  • X is the longitudinal sheet resistance / horizontal sheet resistance of the transparent electrode, and the resistance of the electrode is proportional to the length, this may be equal to the horizontal length / vertical length of the area where the mesh pattern is formed. That is, when the horizontal length / vertical length of the area where the mesh pattern is formed is determined, the ratio of the horizontal length and the vertical length of the unit mesh which can minimize the maximum resistance of the transparent electrode according to the length ratio can be determined by the above equation. have.
  • the transparent electrode of the present invention satisfies Equation 1:
  • X is the width / length of the predetermined area and Y is the length / length of the unit mesh in the mesh pattern.
  • X is the width / length of a predetermined area where a mesh pattern is formed, which is determined according to the specification of the product to which the transparent electrode is applied.
  • the area where the mesh pattern is formed corresponds to the area of the touch sensing unit (display unit) of the touch sensor. That is, when the product specification of the touch sensor is determined, the X value is determined. Accordingly, the horizontal length / vertical length of the unit mesh capable of minimizing the resistance is determined according to the above equation.
  • the above equation means that the length / length of the unit mesh in the mesh pattern is within ⁇ 30% of the value capable of minimizing the maximum resistance.
  • the resistance of the transparent electrode is increased, so that high-speed driving and low-power driving are difficult.
  • the transparent electrode of the present invention may satisfy the following Equation 2:
  • X is the width / length of the predetermined area and Y is the length / length of the unit mesh in the mesh pattern.
  • the horizontal length of the unit mesh may be, for example, 100 ⁇ m to 700 ⁇ m, and the vertical length may be 100 ⁇ m to 700 ⁇ m.
  • the line width of the unit mesh may be, for example, 1 to 10 ⁇ m.
  • the resistance may increase, or problems such as deterioration of touch sensitivity and pattern visibility may occur.
  • the thickness of the mesh pattern is not particularly limited, and may be, for example, 10 to 350 nm. If the thickness of the mesh pattern is less than 10nm, the electrical resistance increases, and if the thickness of the mesh pattern is greater than 350nm, the reflectance may increase, causing problems of visibility and patterning process.
  • the material of the mesh pattern according to the present invention may be used without limitation as long as it is a conductive material.
  • a conductive material for example, molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, chromium, nickel, tungsten or the like 2 or more types of alloys are mentioned.
  • a transparent electrode material known in the art may be further used.
  • ITO indium tin oxide
  • IZO indium zinc oxide
  • ZnO zinc oxide
  • IZTO indium zinc oxide
  • CTO cadmium tin oxide
  • CO copper oxide
  • PEDOT poly (3, 4-ethylenedioxythiophene)
  • carbon nanotubes CNT
  • graphene graphene
  • the method of forming the mesh pattern is not particularly limited, and for example, may be formed by various thin film deposition techniques such as physical vapor deposition (PVD) and chemical vapor deposition (Chemical VaporDeposition, CVD). For example, it may be formed by reactive sputtering, which is an example of physical vapor deposition.
  • PVD physical vapor deposition
  • CVD chemical vapor deposition
  • reactive sputtering which is an example of physical vapor deposition.
  • the mesh pattern may be formed by a printing process.
  • various printing methods such as gravure off set, reverse off set, inkjet printing, screen printing, and gravure printing may be used.
  • it may be formed by photolithography.
  • the mesh pattern according to the present invention includes a first mesh pattern formed by connecting the unit mesh pattern to the joint part in the first direction and a second mesh pattern formed by separating the unit mesh pattern in the second direction. It may include.
  • the first mesh pattern and the second mesh pattern are arranged in different directions.
  • the first direction may be an X-axis direction
  • the second direction may be a Y-axis direction vertically intersecting with the second direction, but is not limited thereto.
  • the first mesh pattern and the second mesh pattern provide information about the X coordinate and the Y coordinate of the touched point. Specifically, when a human hand or an object contacts the cover window substrate, a change in capacitance according to the contact position is transmitted to the driving circuit via the first mesh pattern, the second mesh pattern, and the position detection line. Then, the contact position is grasped by the change of the capacitance converted into an electrical signal by the X and Y input processing circuit (not shown) or the like.
  • the first mesh pattern and the second mesh pattern are formed on the same layer, and each of the patterns must be electrically connected to detect a touched point.
  • the first mesh pattern is a unit mesh patterns are connected to each other through the joint portion, but the second mesh pattern is a structure in which the unit mesh patterns are separated from each other in an island form to electrically connect the second mesh pattern.
  • a separate bridge pattern is needed. The bridge pattern will be described later.
  • the transparent electrode of the present invention may further include a bridge pattern connecting the spaced unit mesh patterns of the second pattern.
  • the bridge pattern connects the spaced unit mesh patterns of the second mesh pattern. At this time, since the bridge pattern should be insulated from the first mesh pattern of the mesh pattern, an insulating layer is formed for this purpose. This will be described later.
  • the bridge pattern may be applied without limitation to the transparent electrode material known in the art.
  • indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc oxide (IZTO), cadmium tin oxide (CTO), copper oxide (CO), PEDOT (poly (3) , 4-ethylenedioxythiophene)), carbon nanotubes (CNT), graphene (graphene), and the like may be used alone or in combination of two or more.
  • ITO indium tin oxide
  • ITO indium tin oxide
  • ITO indium tin oxide
  • ITO indium tin oxide
  • These can be used individually or in mixture of 2 or more types.
  • materials with high electrical conductivity and low resistance can be applied without limitation, for example, molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, chromium, nickel, tungsten or two of them. And alloys of species or more.
  • the size of the bridge pattern is not particularly limited, and for example, the long side may be 2 to 500 ⁇ m, preferably 2 to 300 ⁇ m, but is not limited thereto.
  • the long side of the bridge pattern is 2 to 500 ⁇ m, the visibility of the pattern may be reduced and may have an appropriate electrical resistance.
  • the thickness of the bridge pattern may be, for example, 5 to 2,000 nm. When the thickness is in the above range, the decrease in transmittance can be minimized while improving the resistance.
  • the formation method of a bridge pattern is not specifically limited, For example, the method illustrated by the formation method of the mesh pattern mentioned above can be used.
  • the transparent electrode of the present invention may further include an insulating layer.
  • the insulating layer is interposed between the mesh pattern and the bridge pattern to insulate the first mesh pattern and the second mesh pattern.
  • the insulating layer may be located in the form of an island only at the intersection of the mesh pattern and the bridge pattern, or may be entirely located in the form of a layer (not shown).
  • the second mesh pattern is directly connected to the bridge pattern.
  • the second mesh pattern is connected to the bridge pattern through a contact hole (not shown) formed in the insulating layer. Connected.
  • the insulating layer can be formed using no particular limitation on the materials and methods used in the art.
  • the stacking order of the mesh pattern and the bridge pattern is not particularly limited.
  • the stacking order of the mesh pattern and the bridge pattern may be stacked in the order of the mesh pattern and the bridge pattern. In such a case, it may be laminated in the order of the mesh pattern, the insulating layer and the bridge pattern.
  • FIG. 3 may be stacked in the order of the bridge pattern and the mesh pattern. In such a case, it may be laminated in the order of the bridge pattern, the insulating layer and the mesh pattern.
  • the touch sensor of the present invention may be formed on the substrate 1.
  • the substrate 1 may be any material commonly used in the art without limitation, for example, glass, polyethersulphone (PES), polyacrylate (PAR, polyacrylate), polyether imide (PEI, polyetherimide, polyethylene naphthalate (PEN, polyethyelenen napthalate), polyethylene terephthalate (PET, polyethyelene terepthalate), polyphenylene sulfide (PPS), polyallylate, polyimide, polycarbonate ( PC, polycarbonate), cellulose tri acetate (TAC), cellulose acetate propionate (CAP), and the like.
  • PES polyethersulphone
  • PAR polyacrylate
  • PEI polyether imide
  • PEN polyethylene naphthalate
  • PET polyethyelene terepthalate
  • PPS polyphenylene sulfide
  • PC polycarbonate
  • TAC cellulose tri acetate
  • CAP cellulose acetate propionate
  • the present invention provides an electronic device including the transparent electrode.
  • the electronic device can be used without limitation as long as it is a general electronic device known to include a transparent electrode.
  • it may be an antenna, a touch sensor, a battery, an image display device, an imaging device, or the like.
  • the touch sensor may also be applied to the image display device.
  • the touch sensor can be applied to various image display devices such as electroluminescent display devices, plasma display devices, and field emission display devices as well as ordinary liquid crystal display devices.
  • a transparent electrode having a structure as shown in FIGS. 1 and 2 was prepared.
  • the mesh pattern was made of silver, palladium, copper alloy, the thickness was 2000 ⁇ (angstrom), the line width of the unit mesh was 3 ⁇ m, the horizontal long width of the unit mesh pattern was 4mm.
  • the bridge pattern was also manufactured by the mesh of the same specification as above.
  • Sheet resistance in each direction was simulated according to the length / length of the unit mesh, which is shown in FIG. 11. Based on this evaluation result, a correlation between the sheet resistance ratio in each of the vertical and horizontal directions and the unit mesh width and length length was derived.
  • X is the longitudinal sheet resistance / horizontal sheet resistance of the transparent electrode
  • Y is the horizontal length / length of the unit mesh in the mesh pattern
  • the channel resistance of the transparent electrodes of Examples 1-3 was evaluated by changing Y value by simulation. Evaluation results are shown in FIGS. 5 to 7.
  • the maximum resistance is the sum of the horizontal channel resistance and the vertical channel resistance, and the maximum resistance of the transparent electrodes of Examples 1 to 3 was obtained through calculation. Through this, it was confirmed that the maximum resistance value can be obtained to the minimum in the region of the Y value of Equation 3. The results are shown in FIGS. 8 to 10.
  • substrate 10 first mesh pattern
PCT/KR2017/000334 2016-01-26 2017-01-10 투명 전극 및 이를 포함하는 전자 장치 WO2017131362A1 (ko)

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CN201780005967.0A CN108475557B (zh) 2016-01-26 2017-01-10 透明电极及包括其的电子装置

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KR10-2016-0009298 2016-01-26
KR1020160009298A KR102082485B1 (ko) 2016-01-26 2016-01-26 투명 전극 및 이를 포함하는 전자 소자

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WO2019172609A1 (ko) * 2018-03-06 2019-09-12 동우화인켐 주식회사 안테나 소자 및 이를 포함하는 디스플레이 장치
CN111033892A (zh) * 2017-08-24 2020-04-17 东友精细化工有限公司 薄膜天线和包含该薄膜天线的显示装置

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KR102243515B1 (ko) * 2018-03-06 2021-04-21 동우 화인켐 주식회사 필름 안테나 및 이를 포함하는 디스플레이 장치
KR20220011480A (ko) * 2020-07-21 2022-01-28 동우 화인켐 주식회사 안테나 소자 및 이를 포함하는 디스플레이 장치
KR102215303B1 (ko) * 2020-09-15 2021-02-10 동우 화인켐 주식회사 필름 안테나 및 이를 포함하는 디스플레이 장치

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TW201800919A (zh) 2018-01-01
TWI712934B (zh) 2020-12-11
KR20170089198A (ko) 2017-08-03
CN108475557A (zh) 2018-08-31
KR102082485B1 (ko) 2020-02-27

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