WO2013139240A1 - 触控面板之导电薄膜及其制造方法 - Google Patents

触控面板之导电薄膜及其制造方法 Download PDF

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Publication number
WO2013139240A1
WO2013139240A1 PCT/CN2013/072776 CN2013072776W WO2013139240A1 WO 2013139240 A1 WO2013139240 A1 WO 2013139240A1 CN 2013072776 W CN2013072776 W CN 2013072776W WO 2013139240 A1 WO2013139240 A1 WO 2013139240A1
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WIPO (PCT)
Prior art keywords
touch panel
film
conductive film
water repellent
conductive
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PCT/CN2013/072776
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English (en)
French (fr)
Inventor
李裕文
许贤斌
阮克铭
林奉铭
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宸鸿科技(厦门)有限公司
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Publication of WO2013139240A1 publication Critical patent/WO2013139240A1/zh

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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
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • 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
    • G06F3/0412—Digitisers structurally integrated in a display
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K17/9618—Touch switches using a plurality of detectors, e.g. keyboard
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
    • H05K3/12—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns
    • H05K3/1208—Pretreatment of the circuit board, e.g. modifying wetting properties; Patterning by using affinity patterns
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K2017/9602—Touch switches characterised by the type or shape of the sensing electrodes
    • H03K2017/9604—Touch switches characterised by the type or shape of the sensing electrodes characterised by the number of electrodes
    • H03K2017/9613—Touch switches characterised by the type or shape of the sensing electrodes characterised by the number of electrodes using two electrodes per touch switch
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/96015—Constructional details for touch switches
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0286—Programmable, customizable or modifiable circuits
    • H05K1/0287—Programmable, customizable or modifiable circuits having an universal lay-out, e.g. pad or land grid patterns or mesh patterns
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/01—Tools for processing; Objects used during processing
    • H05K2203/0104—Tools for processing; Objects used during processing for patterning or coating
    • H05K2203/0117—Pattern shaped electrode used for patterning, e.g. plating or etching
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/11—Treatments characterised by their effect, e.g. heating, cooling, roughening
    • H05K2203/1173—Differences in wettability, e.g. hydrophilic or hydrophobic areas

Definitions

  • the present invention relates to a touch panel, and more particularly to a conductive film of a touch panel and a method of manufacturing the same.
  • the touch panel has been widely used in the current life. By integrating the touch panel into the display panel, one can control the electronic device to execute the corresponding command through the touch operation of the display screen.
  • the conductive film of the touch panel is, for example, indium tin oxide (Indium tin oxide (referred to as ITO) film, and the conductive film is formed on a transparent insulating substrate, for example, glass plate or polyethylene terephthalate (Polyethylene) Terephthalate, simply called PET) board.
  • ITO Indium tin oxide
  • PET polyethylene terephthalate
  • FIG. 1A is a perspective view of a conductive film of a conventional touch panel
  • FIG. 1B It is a plan view of a conductive film of a conventional touch panel
  • FIG. 1C is a cross-sectional view of the conductive film of the conventional touch panel along a section line AA.
  • Figure 1A, Figure 1B and Figure 1C As shown, the conductive film 11 is entirely overlying the substrate 12 prior to patterning in accordance with the designed electrode pattern. Due to the material forming the conductive film 11, such as ITO The absorption of light causes the light transmittance of the touch panel formed by the conventionally covered conductive film 11 to be poor.
  • the current conductive film can also be made of a conductive polymer. , Carbon nanotubes (CNT) or Ag nanowire Formed. Conductive polymers, carbon nanotubes, and nano-silver wires have a strong absorption rate for visible light, so their transmittance is low. Therefore, the light transmittance of the touch panel using the conductive film of the above type will also be greatly reduced.
  • CNT Carbon nanotubes
  • Ag nanowire Formed Ag nanowire Formed.
  • Conductive polymers, carbon nanotubes, and nano-silver wires have a strong absorption rate for visible light, so their transmittance is low. Therefore, the light transmittance of the touch panel using the conductive film of the above type will also be greatly reduced.
  • the formed conductive film can be formed into a hollow of the conductive film by a conventional patterning process to increase its light transmittance.
  • the conventional patterning process is difficult to apply due to the characteristics of the conductive polymer itself, and the light transmittance is not easily increased.
  • the above methods all add an additional patterning process, resulting in an increase in the manufacturing cost of the touch panel. Therefore, providing a conductive film of a high transmittance touch panel and a simple method for manufacturing the conductive film of the touch panel become technical problems to be solved by those skilled in the art.
  • the invention provides a conductive film of a touch panel, wherein the conductive film of the touch panel comprises a film and a plurality of water repellent units.
  • Film for sensing touch signals a plurality of water repellent units are disposed in the film at intervals.
  • the plurality of water repellent units have good light transmittance, and the presence thereof will effectively increase the light transmittance of the conductive film of the touch panel.
  • Embodiments of the present invention provide an electrode layer of a touch panel, the electrode layer including a plurality of electrodes and a plurality of water repellent units.
  • a plurality of electrodes are formed by a patterned conductive film, and a plurality of water repellent cells are disposed in the plurality of electrodes.
  • the plurality of water repellent units have good light transmittance, and the presence thereof effectively increases the light transmittance of the electrode layer of the touch panel.
  • Embodiments of the present invention provide a touch panel having a highly transparent conductive film, the touch panel including a substrate and an electrode layer disposed on the substrate.
  • the electrode layer comprises a plurality of electrodes and a plurality of wires, the plurality of electrodes are formed by a patterned conductive film, and the plurality of wires are electrically connected to the plurality of electrodes; the plurality of water repellent units are arranged in a plurality of electrodes.
  • the touch panel has high light transmittance and can sense the touch action of the user. .
  • Embodiments of the present invention provide a method of manufacturing a conductive film of a touch panel, the method of manufacturing comprising: forming a plurality of water repellent units; and forming a film for sensing a touch signal, wherein the plurality of water repellents The cell spacing is set in the film.
  • the conductive film of the formed touch panel can effectively increase the light transmittance by providing the water repellent unit having good light transmittance.
  • the conductive film of the touch panel provided or manufactured by the present invention has a plurality of water repellent units, so that the light transmittance is high.
  • FIG. 1A is a perspective view of a conductive film of a conventional touch panel
  • FIG. 1B is a plan view of a conductive film of a conventional touch panel
  • FIG. 1C It is a cross-sectional view of the conductive film of the conventional touch panel along the section line AA.
  • FIG. 2A is a perspective view of a conductive film according to an embodiment of the present invention
  • FIG. 2B is a plan view of a conductive film of the touch panel of the present invention
  • FIG. 1C It is a cross-sectional view of the conductive film of the touch panel of the present invention along the section line AA.
  • 3A-3D are schematic views respectively showing the chemical structural formulas of different anti-fingerprint coatings provided by the embodiments of the present invention.
  • Figure 4A ⁇ 4E The shape of the plurality of water repellent units of the pattern provided by the embodiment of the present invention is a square, a rectangle, a diamond, a pentagon, and a hexagon.
  • Each of the plurality of water repellent units provided in the embodiment of the present invention is formed on the substrate by a positive method, a hexagonal shape, a diamond shape, and a rectangular arrangement.
  • FIG. 6 is a flow chart showing a method of manufacturing a conductive film of a touch panel according to an embodiment of the present invention.
  • FIG. 7 is a plan view showing a conductive film of a touch panel according to an embodiment of the present invention as an electrode layer of the touch panel.
  • Figure 8 is a plan view of a touch panel of an electroconductive film according to an embodiment of the present invention.
  • FIG. 2A is a perspective view of the conductive film according to the embodiment of the present invention
  • FIG. 2B It is a plan view of the conductive film of the touch panel of the present invention.
  • the conductive film 21 of the touch panel in the embodiment of the present invention includes a film for sensing a touch signal.
  • Multiple water repellent units 23 It has good light transmittance, and its presence can effectively increase the light transmittance of the conductive film of the touch panel.
  • FIG. 2C is a conductive film of the touch panel according to the embodiment of the present invention along a section line AA.
  • Sectional view As shown in FIG. 2C, a conductive film 21 of the touch panel is formed on the substrate 22, wherein the substrate 22 It may be a transparent insulating substrate such as a glass plate, a ceramic plate, a plastic plate, a polyethylene terephthalate plate, and a flexible substrate. Or any other substrate formed of suitable materials.
  • a plurality of water repellent units 23 are formed by patterning a water repellent material, and the film 24 It is a transparent film composed of a water-soluble conductive material.
  • the water repellent material may be preliminarily coated on the substrate 22 to form a plurality of water repellent units by a patterning process such as screen printing, inkjet printing or a yellow/etching process. Then, a water-soluble conductive solution containing a water-soluble conductive material is prepared on the substrate 22, and then the substrate 22 is dried to form a conductive film of the touch panel. .
  • the water repellent material prevents the water soluble conductive material from being distributed to the plurality of water repellent units 23 In the region where the water-soluble conductive material can only cover the substrate 22 outside the region of the plurality of water repellent units 23 to form the film 24 .
  • the above water repellent material is at least an anti-fingerprint coating (AF), a release agent, a release agent, a silicone oil and a silicone, but is not limited thereto.
  • the anti-fingerprint coating belongs to fluorocarbon, and the fluorocarbon has the formula F(C 3 HOF 4 ) n C 2 F 4 (CH 2 ) m O(CH 2 ) a Si(OR) 3 , where m , a can be an integer from 1 to 6, and R can be a methyl group of up to 6 carbons.
  • m and a are 1 and 3, respectively, and R is a methyl group (represented by Me in Fig.
  • Fig. 3A shows a variation of the above formula, in which one methoxy group (OMe) is replaced by OSMe 2 (CH 2 ) 2 Si(OMe) 3 , and the fluorocarbon has the formula F(C 3 HOF 4 ) n C 2 F 4 CH 2 O (CH 2 ) 3 Si(OMe) 3 OSMe 2 (CH 2 ) 2 Si(OMe) 3 .
  • the fluorocarbon may also be F(C 3 HOF 4 ) n C 2 F 4 -R , wherein R is CONH(CH 2 ) 3 Si(OMe) 3 , and its chemical structural formula is shown in Figure 3C.
  • R is CONH(CH 2 ) 3 Si(OMe) 3
  • R may also be CONH(CH 2 ) 3 SiMe 2 OSMe 2 (CH 2 ) 2 Si(OMe) 3
  • Its chemical structural formula is shown in Figure 3D, and its molecular formula is F(C 3 HOF 4 ) n C 2 F 4 CONH(CH 2 ) 3 SiMe 2 OSMe 2 ( CH 2 ) 2 Si(OMe) 3
  • the compound is not limited to this.
  • the water-soluble conductive material may be any one of water-soluble conductive materials or a combination thereof, such as, but not limited to, a conductive polymer, a
  • FIGS. 4A 4E and 4E to 4E are schematic views of different shapes of a plurality of water repellent units 23 according to an embodiment of the present invention. As shown in Figures 4A to 4E, different from Figure 2A
  • the water-repellent unit 23 having a circular shape and the water-repellent unit 23 of Figs. 4A to 4E are respectively square, rectangular, rhombic, pentagonal, and hexagonal.
  • FIG. 5A to FIG. 5D are a plurality of water repellent units 23 according to an embodiment of the present invention. Schematic diagrams in different arrangements. As shown in FIG. 5A, the plurality of water repellent units 23 are arranged in a square shape (the distance between any two adjacent water repellent units 23 is d); As shown, the plurality of water repellent units 23 are respectively arranged in a hexagonal manner; as shown in Fig. 5C, the plurality of water repellent units 23 are respectively arranged in a diamond shape, as shown in Fig.
  • the plurality of water repellent units 23 They are arranged in a rectangular shape (the distance between the two water-repellent units 23 adjacent to each other is d1, the distance between the two adjacent water-repellent units 23 is d2, and d1 is not equal to d2).
  • the conductive film 21 of the touch panel of the embodiment of the invention is not limited to the water-soluble conductive material and the plurality of water-repellent units 23 The shape, arrangement and type of water repellent material.
  • the conductive film 21 of the touch panel may further include a protective film covering the film 24 (not shown in FIG. 2A). 2B and 2C), the protective film acts as a protective layer of the touch panel to protect the conductive film. The material and process steps of the protective film are detailed in FIG.
  • FIG. 6 is a flowchart of a method for manufacturing a conductive film of a touch panel according to an embodiment of the present invention.
  • a plurality of water repellent units 23 are formed (for example, formed on the substrate 22 in a square arrangement, and the shape of the water repellent unit 23 is, for example, a circle) . More specifically, the water repellent material is coated on the substrate 22, and a plurality of water repellent units are formed by a patterning process such as screen printing, ink jet printing, or a yellow/etching process.
  • step S502 A water-soluble conductive solution (for example, a carbon nanotube) containing a water-soluble conductive material is disposed on the substrate 22 to form a film 24 in which a plurality of water repellent units 23 are spaced apart from the film 24 Medium. More specifically, since the plurality of water repellent units 23 are repellent to the water-based material, the water-soluble conductive solution can cover only the substrate 22 outside the region of the plurality of water repellent units 23, whereby the film can be formed 24 .
  • step S504 the substrate 22 is further dried to obtain a conductive film 21 of the touch panel formed on the substrate 22.
  • the manufacturing method of the conductive film of the touch panel may further include step S506. With S508.
  • a protective film solution is formulated on the substrate 22.
  • the substrate 22 is dried to form a protective film over the film 24.
  • the material of the protective film may preferably include inorganic materials such as silicon nitride, silicon oxide, and silicon oxynitride (silicon). Oxynitride), an organic material such as an acrylic resin or other suitable material.
  • Multiple water repellent units 23 The materials, shapes and arrangements of the water-soluble conductive materials have been disclosed in detail in the foregoing description and will not be repeated here.
  • FIG. 7 is a plan view showing the conductive film of the touch panel of the embodiment of the present invention as an electrode layer of the touch panel.
  • the conductive film of the touch panel manufactured by the embodiment of the present invention is subjected to a patterning process such as yellow light/etching according to the designed electrode pattern to form a plurality of electrodes 71, and a plurality of water repellents.
  • Unit 23 The interval is set in a plurality of electrodes 71.
  • the plurality of electrodes 71 includes a first electrode array L1 distributed along a first axis (e.g., the X axis) and a second electrode array distributed along a second axis (e.g., a Y axis) L2, and the first electrode array L1 and the second electrode array L2 are electrically insulated by providing insulating blocks 72 at intersections with each other, the first electrode array L1 and the wires 75 Electrically connected, the first electrode array L2 is electrically connected to the wire 74 to form an electrode layer 73 of the touch panel.
  • a first electrode array L1 distributed along a first axis
  • a second electrode array distributed along a second axis (e.g., a Y axis) L2
  • the first electrode array L1 and the second electrode array L2 are electrically insulated by providing insulating blocks 72 at intersections with each other, the first electrode array L1 and the wires 75 Electrically connected, the first electrode array L2 is electrically connected to the wire 74
  • the electrode layer 73 has substantially a plurality of water repellent units 23 and a film inside each of the electrodes 71. 24, wherein a plurality of water repellent units are disposed in the film 24 (refer to an enlarged schematic view of the electrode 71 of FIG. 7), thereby making the electrode layer 73 have high transmittance.
  • the above electrode layer The shape of 73 can be adjusted according to actual needs. Briefly, the shape of the electrode layer 73 is not intended to limit the invention.
  • the touch panel 81 includes a substrate. 82.
  • An electrode layer 73 disposed on the substrate 82.
  • the electrode layer 73 includes a plurality of electrodes 71, and the plurality of electrodes 71 are patterned conductive films.
  • a plurality of water repellent units 23 are formed in the plurality of electrodes, thereby providing the touch panel 81 with high light transmittance and sensing the touch action of the user. Since the conductive film 21 is provided with a plurality of water repellent units 23
  • the touch panel 81 in this embodiment has a good light transmittance and exhibits an excellent visual effect.
  • the above embodiment of the present invention applies the conductive film of the touch panel to the touch panel, it should be noted that the application of the conductive film of the touch panel of the present invention is not limited thereto. Any structure or manufacturing method, which is similar in principle to the conductive film of the above touch panel, may be within the scope of the present invention.
  • the conductive material of the conductive film of the touch panel formed in the embodiment of the invention is only distributed in the area without the water repellent unit, and the water repellent unit has good light transmittance, so the touch panel can produce high light transmission characteristics. .
  • the conductive film of the touch panel is made of a conductive material having higher conductivity, so that compared with the conventional ITO The film, the conductive film of the touch panel has better conductivity.
  • the conductive film of the conventional touch panel is physically used to cut or etch the conductive film of the touch panel, so that the conductive film of the touch panel is hollowed out and the light transmittance is increased.
  • the manufacturing method of the conductive film of the touch panel is relatively simple and easy, and has the advantage of low manufacturing cost.

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  • Theoretical Computer Science (AREA)
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Abstract

一种触控面板之导电薄膜（21），此导电薄膜（21）包括薄膜（24）与复数个斥水单元（23）。薄膜（24）用以感测触控信号，而复数个斥水单元（23）间隔设置于薄膜（24）中。该触控面板之导电薄膜（21）之导电材料仅分布在没有斥水单元（23）的区域，且斥水单元（23）具有良好的透光率，故触控面板能够产生高透光的特点。

Description

触控面板之导电薄膜及其制造方法 技术领域
本发明是有关于一种触控面板，且特别是指一种触控面板之导电薄膜及其制造方法。
背景技术
触控面板已经广泛地应用于目前生活中，透过将触控面板整合于显示面板，人们可以透过触控操作其显示画面来控制电子装置执行对应的指令。目前触控面板的导电薄膜例如是氧化铟锡（ Indium tin oxide ，简称之为 ITO ）薄膜，且此导电薄膜形成于透明绝缘基板上，例如，玻璃板或聚对苯二甲酸乙二酯 (Polyethylene terephthalate ，简称之为 PET) 板。
请参照图 1A 、图 1B 与图 1C ，图 1A 是传统触控面板之导电薄膜的立体图，图 1B 是传统触控面板之导电薄膜的平面图，而图 1C 是传统触控面板之导电薄膜沿着剖面线 AA 的剖面图。如图 1A 、图 1B 与图 1C 所示，在依照所设计的电极图案进行图案化之前，导电薄膜 11 系全面地覆盖于基板 12 之上。由于形成导电薄膜 11 的材料如 ITO 等对于光线的吸收，导致传统全面覆盖的导电薄膜 11 所形成的触控面板的透光性不佳。目前的导电薄膜还可以是由导电高分子 (conductive polymer) 、奈米碳管 (Carbon nanotubes ，简称为 CNT) 或奈米银线 (Ag nanowire) 所形成。导电高分子、奈米碳管与奈米银线等材料对可见光具有较强的吸收率，故其穿透率较低。因此，使用上述这一类型之导电薄膜的触控面板之透光性也将大幅地降低。
在现有技术中，针对由 ITO 形成的导电薄膜，可以运用常规图案化制程形成导电薄膜的镂空，以增加其透光率。然而，针对导电高分子形成的导电薄膜，由于导电高分子本身的特性，常规的图案化制程难以应用，其透光率不易增加。除此之外，上述方法均增加了额外的图案化制程，导致触控面板制造成本的上升。因此，提供一种高透光率的触控面板之导电薄膜，以及一种简便的制造该触控面板之导电薄膜的方法，成为本领域技术人员亟待解决的技术难题。
发明内容
本发明提供一种触控面板之导电薄膜，所述触控面板之导电薄膜系包括一薄膜与复数个斥水单元。薄膜用于感测触控信号 , 复数个斥水单元间隔设置于该薄膜中。所述复数个斥水单元具有良好的透光率，其存在将有效地增加触控面板之导电薄膜的透光率。
本发明实施例提供一种触控面板之电极层，所述电极层包括复数个电极与复数个斥水单元。复数个电极系由图案化的导电薄膜形成，而复数个斥水单元间隔设置于该复数个电极中。所述复数个斥水单元具有良好的透光率，其存在将有效地增加触控面板之电极层的透光率。
本发明实施例提供一种具有高透光导电薄膜之触控面板，所述触控面板包括基板与设置于基板上的电极层。电极层包括复数个电极与复数条导线，复数个电极系由图案化的导电薄膜形成，复数条导线与复数个电极电性连接；复数个斥水单元间隔设置复数个电极中。藉此使该触控面板具有高透光率，并可感测到使用者之触控动作。。
本发明实施例提供一种触控面板之导电薄膜的制造方法，所述制造方法包括：形成复数个斥水单元；以及形成薄膜，薄膜用于感测触控信号，其中所述复数个斥水单元间隔设置于该薄膜中。如此，所形成的触控面板之导电薄膜因设有该些具备良好透光率的斥水单元，而可以有效地增加其透光率。
根据以上所述，本发明所提供或制造的触控面板之导电薄膜具有复数个斥水单元，故具有较高的透光率。
附图说明
图 1A 是传统触控面板之导电薄膜的立体图，图 1B 是传统触控面板之导电薄膜的平面图，而图 1C 是传统触控面板之导电薄膜沿着剖面线 AA 的剖面图。
图 2A 是本发明实施之导电薄膜之立体图，图 2B 是本发明实施之触控面板之导电薄膜之平面图，而图 1C 是本发明实施之触控面板之导电薄膜沿着剖面线 AA 的剖面图。
图 3A ～图 3D 分别是本发明实施例提供之不同抗指纹镀膜之化学结构式的示意图。
图 4A ～ 4E 是本发明实施例所提供之图案之复数个斥水单元之形状分别为正方形、矩形、菱形、五边形、六边形的示意图。
图 5A ～图 5D 分别是本发明实施例提供之复数个斥水单元以正方法、六角形、菱形与矩形排列方式形成于基板之示意图。
图 6 是本发明实施例之触控面板之导电薄膜的制造方法之流程图。
图 7 是本发明实施例之触控面板之导电薄膜作为触控面板之电极层的平面图。
图 8 是本发明实施例之导电薄膜的触控面板之平面图。
具体实施方式
为进一步了解本发明之技术特征及内容，请参阅以下有关本发明之详细说明与附图，然而所附图式仅提供参考与说明用，并非用来对本发明加以限制者。
请参照图 2A 与图 2B ，图 2A 是本发明实施之导电薄膜之立体图，图 2B 是本发明实施之触控面板之导电薄膜之平面图。如图 2A 和图 2B 所示，本发明实施例中之触控面板之导电薄膜 21 包括用于感测触控信号的薄膜 24 以及复数个斥水单元 23 ，其中复数个斥水单元 23 间隔设置于薄膜 24 中，藉此使该触控面板之导电薄膜具有高透光率。复数个斥水单元 23 具有良好的透光率，其存在可有效地增加触控面板之导电薄膜之透光率。
接下来，请进一步参照图 2C ，而图 2C 是本发明实施例之触控面板之导电薄膜沿着剖面线 AA 之剖面图。如图 2C 所示，触控面板之导电薄膜 21 系形成于基板 22 之上，其中基板 22 可以是透明绝缘基板，例如玻璃板、陶瓷板、塑胶板、聚对苯二甲酸乙二酯板以及可挠式基板 (flexible substrate) 或其它任何适合材料所形成之基板。
复数个斥水单元 23 系由斥水性材料经图案化后形成，薄膜 24 系透明薄膜，由水溶性导电材料构成。更详细地说，斥水性材料可以预先覆盖于基板 22 上，透过网版印刷、喷墨印刷或黄光 / 蚀刻制程等图案化制程形成复数个斥水单元 23 ；接着，再将包含水溶性导电材料的水溶性导电溶液调配于基板 22 上，然后对基板 22 进行烘干后，即可以形成触控面板之导电薄膜 21 。因为复数个斥水单元 23 的材料是斥水性材料，斥水性材料可阻止水溶性导电材料分布至复数个斥水单元 23 所在的区域，因此水溶性导电材料只能覆盖于复数个斥水单元 23 区域之外的基板 22 上，以形成所述薄膜 24 。
值得说明的是，上述的斥水性材料至少是防指纹镀膜 (Anti-fingerprint coating, 简称为 AF) 、离型剂、脱模剂（ release agent ）、硅油与硅利康 (silicone) ，但并不限于此。防指纹镀膜属于碳氟化合物 (fluorocarbon) ，该碳氟化合物的通式为 F(C3HOF4)nC2F 4(CH2)mO(CH2)aSi(OR) 3 ，其中 m 、 a 可为 1 至 6 的整数，而 R 可为最多含 6 个碳的甲基。如图 3A 所示之化学式，在此具体实施例中， m 、 a 分别为 1 、 3 ， R 则为甲基 ( 在图 3A 中以 Me 表示 ) ，该化合物的分子式为 F(C3HOF4) nC2F4CH2O(CH2) 3Si(OMe)3 。图 3B 显示上式的变化实施例，图 3A 中一个甲氧基 (OMe) 被 OSMe2 （ CH2 ） 2 Si(OMe)3 所取代，该碳氟化合物的分子式为 F(C3HOF4)nC2F 4CH2O (CH2)3Si(OMe)3OSMe2 （ CH2 ） 2 Si(OMe)3 。再者，该碳氟化合物亦可为 F(C3HOF4)nC2F 4-R ，其中 R 为 CONH(CH2)3Si(OMe)3 ，其化学结构式如图 3C 所示，分子式为 F(C3HOF4)nC2F 4CONH(CH2)3Si(OMe)3 ； R 亦可为 CONH(CH2)3SiMe2OSMe 2(CH2)2Si(OMe)3 ，其化学结构式如图 3D 所示，分子式为 F(C3HOF4)nC2F 4CONH(CH2)3SiMe2OSMe 2 （ CH2 ） 2 Si(OMe)3 ，但本发明之碳氟化合物并不限于此。水溶性导电材料可以是任何一种的水溶性导电材料或其组合，例如导电高分子、奈米碳管或奈米银线等，但并不限于此。
另外，复数个斥水单元 23 在触控面板之导电薄膜 21 中的形状可依照设计的需要进行调整。请参照图 4A ～图 4E ，图 4A ～ 4E 是本发明实施例所提供之复数个斥水单元 23 之不同形状的示意图。如图 4A ～ 4E 所示，不同于图 2A 之圆形形状的斥水单元 23 ，图 4A ～ 4E 之斥水单元 23 的形状分别为正方形、矩形、菱形、五边形与六边形。
请参考图 5A ～图 5D 中，图 5A ～图 5D 是本发明实施例提供之复数个斥水单元 23 以不同排列方式之示意图。如图 5A 所示，此复数个斥水单元 23 分别以正方形 ( 任两相邻的斥水单元 23 之距离为 d) 的方式排列；如图 5B 所示，此复数个斥水单元 23 分别以六边形的方式排列；如图 5C 所示，此复数个斥水单元 23 分别以菱形排列，如图 5D 所示，此复数个斥水单元 23 分别以矩形 ( 左右相邻的两斥水单元 23 之距离为 d1 ，上下相邻的两斥水单元 23 之距离为 d2 ，且 d1 不等于 d2) 的方式排列。
本发明实施例的触控面板之导电薄膜 21 并不限制其水溶性导电材料、复数个斥水单元 23 的形状、排列方式与其斥水性材料的类型。除此之外，在其他种类型的实施例中，触控面板之导电薄膜 21 更可包括覆盖于薄膜 24 之上的保护膜 ( 未绘于图 2A ，图 2B 与图 2C 中 ) ，该保护膜作为触控面板之保护层起到保护导电薄膜的作用，保护膜的材料和制程步骤详述于图 6 中。
接下来，请参照图 6 ，图 6 是本发明实施例之触控面板之导电薄膜的制造方法之流程图。如图 6 所示，首先，在步骤 S500 中，形成复数个斥水单元 23( 例如，以正方形排列的方式形成于基板 22 ，且斥水单元 23 的形状例如为圆形 ) 。更详细地说，将斥水性材料覆盖于基板 22 上，透过网版印刷、喷墨印刷或黄光 / 蚀刻制程等图案化制程形成复数个斥水单元。之后，在步骤 S502 中，调配包含有水溶性导电材料的水溶性导电溶液 ( 例如，奈米碳管 ) 于基板 22 上，以形成薄膜 24 ，其中复数个斥水单元 23 间隔设置于薄膜 24 中。更具体地说，由于复数个斥水单元 23 系斥水性材料，水溶性导电溶液只能覆盖于复数个斥水单元 23 区域之外的基板 22 上，故可藉此形成薄膜 24 。接着，在步骤 S504 中，进一步对基板 22 进行烘干，以获得成型于基板 22 上的触控面板之导电薄膜 21 。
另外，为了进一步地保护触控面板之导电薄膜 21 ，所述触控面板之导电薄膜的制造方法更可以包括步骤 S506 与 S508 。在步骤 S506 中，调配保护膜溶液于基板 22 上。然后，在步骤 S508 中，对基板 22 进行烘干，以形成保护膜覆盖于薄膜 24 之上。 保护膜的材料较佳可包括无机材料例如氮化硅 (silicon nitride) 、氧化硅 (silicon oxide) 与氮氧化硅 (silicon oxynitride) 、有机材料例如丙烯酸类树脂 (acrylic resin) 或其它适合之材料。复数个斥水单元 23 的材料、形状和排列方式，水溶性导电材料的种类已在前述描述中进行了详细揭露，此处不再重复。
请接着参照图 7 ，图 7 是本发明实施例之触控面板之导电薄膜作为触控面板之电极层的平面图。如图 7 所示，于此实施例中，将本发明实施例制造的触控面板之导电薄膜，依照设计的电极图案进行黄光 / 蚀刻等图案化制程，以形成复数个电极 71 ，而复数个斥水单元 23 间隔设置于复数个电极 71 中。复数个电极 71 包括沿第一轴向（如 X 轴）分布的第一电极阵列 L1 和沿第二轴向 ( 如 Y 轴 ) 分布的第二电极阵列 L2 ，且第一电极阵列 L1 与第二电极阵列 L2 通过在彼此交叉处设置绝缘块 72 的方式实现电性绝缘，第一电极阵列 L1 与导线 75 电性相连，第一电极阵列 L2 与导线 74 电性相连，以形成触控面板之电极层 73 。
在此请注意，在图 7 中，电极层 73 每一个电极 71 内部实质上还具有复数个斥水单元 23 以及薄膜 24 ，其中复数个斥水单元间隔设置于该薄膜中 24 ( 参照图 7 之电极 71 的放大示意图 ) ，藉此使该电极层 73 具有高透光率。另外，上述电极层 73 的形状可以依据实际需求而调整。简单地说，电极层 73 的形状并非用以限制本发明。
请继续参考图 8 ，图 8 为应用本发明实施例中导电薄膜的触控面板，在图 8 中，触控面板 81 包括基板 82 ，设置于基板 82 上的电极层 73 。电极层 73 包括复数个电极 71 ，复数个电极 71 系由图案化的导电薄膜 21 形成，且复数个电极中间隔设置复数个斥水单元 23 ，藉此使触控面板 81 具有高透光率，并可感测到使用者之触控动作。因导电薄膜 21 设有多个斥水单元 23 ，本实施例中的触控面板 81 具有良好的透光率，表现出优异的视觉效果。
除此之外，虽然本案上述实施例是将所产生的触控面板之导电薄膜应用于触控面板，但要说明的是，本发明之触控面板之导电薄膜的应用却非限制于此。举凡结构或制造方法、原理上与上述触控面板之导电薄膜近似者，皆可能在本发明所欲保护的范围内。
总而言之，本发明实施例所形成的触控面板之导电薄膜之导电材料仅分布在没有斥水单元的区域，且斥水单元具有良好的透光率，故触控面板能够产生高透光的特点。
另外，所述触控面板之导电薄膜因采用具有较高导电性之导电材料，故相较于传统 ITO 薄膜，所述触控面板之导电薄膜具有较佳的导电性。除此之外，相较于传统触控面板之导电薄膜使用物理方式来使切割或蚀刻触控面板之导电薄膜，以使触控面板之导电薄膜得以镂空并增加透光率，本发明实施例之触控面板之导电薄膜的制造方法相对来得简单与容易，故具有低制造成本的优势。
以上所述，仅为本发明之较佳可行实施例，非因此局限本创作之专利范围，故举凡运用本发明说明书及图式内容所为之等效技术变化，均含于本发明之发明。

Claims (29)

  1. 一种 触控面板之 导电薄膜，包括：
    一薄膜，用于感测触控信号；
    复数个 斥水单元，间隔设置于该薄膜中 。
  2. 如权利要求 5 之 触控面板之 导电薄膜，其中该薄膜系透明薄膜。
  3. 如权利要求 1 之 触控面板之 导电薄膜，其中该复数个 斥水单元 的材料为斥水性材料。
  4. 如权利要求 3 之导电薄膜，其中该斥水性材料 至少 系 防指纹镀膜、离型剂、脱模剂、硅油与硅利康。
  5. 如权利要求 4 之 触控面板之 导电薄膜，其中该 防指纹镀膜是碳氟化合物。
  6. 如权利要求 5 之 触控面板之 导电薄膜，其中该 碳氟化合物的通式为 F(C 3 HOF 4 ) n C 2 F 4 (CH 2 ) m O(CH 2 ) a Si(OR) 3 ， 其中 m 、 a 为 1 至 6 的整数，而 R 为最多含 6 个碳的甲基。
  7. 如权利要求 6 之触控面板之导电薄膜，其中该 碳氟化合物至少 系 F(C 3 HOF 4 ) n C 2 F 4 CH2O(CH2)3Si(OMe)3 、 F(C 3 HOF 4 ) n C 2 F 4 CH2O(CH2)3Si(OMe)3OSMe 2 （ CH2 ） 2 Si(OMe)3 、 F(C 3 HOF 4 ) n C 2 F 4 CONH(CH2)3Si(OMe)3 和 F(C 3 HOF 4 ) n C 2 F 4 CONH(CH2)3SiMe2OSMe 2 （ CH2 ） 2 Si(OMe)3 。
  8. 如权利要求 1 之触控面板之导电 薄膜，其中该斥水单元 的形状为圆形、正方形、矩形 、菱形、五边形或六边形。
  9. 如权利要求 1 之 触控面板之 导电薄膜，其中该 触控面板之 导电薄膜系形成于一基板上。
  10. 如权利要求 9 之 触控面板之 导电薄膜，其中该基板为 玻璃板或聚对苯二甲酸乙二酯板。
  11. 如权利要求 9 之触控面板之导电薄膜，其中该复数个斥水单元是以正方形、矩形、菱形或六角形的排列方式形成于该基板上。
  12. 如权利要求 1 之触控面板之导电薄膜，其中该 薄膜的材料 为 水溶性导电材料 。
  13. 如权利要求 12 之触控面板之导电薄膜，其中该水溶性导电材料系 导电高分子、奈米碳管与奈米银线中的至少一种。
  14. 如权利要求 1 之触控面板之导电薄膜，其中更包括一保护膜，该保护膜覆盖于该薄膜上。
  15. 如权利要求 13 之触控面板之导电薄膜，其中该保护膜的材料为氮化硅、氧化硅、氮氧化硅、丙烯酸类树脂中的至少一种。
  16. 一种 触控面板之电极层，包括：
    复数个电极， 系由 图案化的导电薄膜形成；以及
    复数个斥水单元，间隔设置于复数个电极中。
  17. 如权利要求 16 之触控面板之电极层， 其中该 复数个电极包括：
    沿第一轴向分布的第一电极阵列和沿第二轴向分布的第二电极阵列，该第一电极阵列与第二电极阵列彼此电性绝缘。
  18. 一种 触控面板，包括：
    一基板；
    一电极层，设置于该基板上，该电极层包括：
    复数个电极，该复数个电极系由图案化的导电薄膜形成；
    复数条导线，该复数条导线与该复数个电极电性连接；
    复数个斥水单元，间隔设置于复数个电极中。
  19. 如权利要求 18 之触控面板， 其中该 复数个电极包括：
    沿第一轴向分布的第一电极阵列和沿第二轴向分布的第二电极阵列，该第一电极阵列与第二电极阵列彼此电性绝缘，该复数条导线与该第一电极阵列以及第二电极阵列电性连接。
  20. 一种触控面板之导电薄膜的制造方法，包括： 形成复数个斥水单元，以及 形成一 薄膜，用于感测触控信号的 ，其中该 复数个斥水单元间隔设置于该薄膜中 。
  21. 如权利要求 20 之触控面板之导电薄膜的制造方法，其中该触控面板之导电薄膜系形成于一基板上。
  22. 如权利要求 21 之触控面板之导电薄膜的制造方法，其中所述形成复数个斥水单元包括：将斥水性材料覆盖于该基板上，透过网版印刷、喷墨印刷或黄光 / 蚀刻制程形成该复数个斥水单元。
  23. 如权利要求 22 之触控面板之导电薄膜的制造方法，其中该 复数个 斥水单元的斥水性材料为 防指纹镀膜、离型剂、脱模剂、硅油与硅利康的至少一种。
  24. 如权利要求 23 之触控面板之导电薄膜的制造方法，其中该 防指纹镀膜是碳氟化合物。
  25. 如权利要求 21 之触控面板之导电薄膜的制造方法，其中该 复数个 斥水单元系以正方形、矩形、菱形或六角形的排列方式形成于该基板上。
  26. 如权利要求 21 之触控面板之导电薄膜的制造方法，其中所述形成一 薄膜 包括：将 包含有水溶性导电材料的 水溶性导电溶液调配于该基板上，该 复数个 水溶性导电溶液覆盖于该 复数个 斥水单元之外 的该基板上。
  27. 如权利要求 26 之触控面板之导电薄膜的制造方法，其中该水溶性导电 材料 为 导电高分子、奈米碳管与奈米银线的至少一种。
  28. 如权利要求 21 之触控面板之导电薄膜的制造方法，更包括：
    调配保护膜溶液于该基板；以及
    对该基板进行烘干，以形成一保护膜覆盖该网状结构上。
  29. 如权利要求 20 之导电薄膜的制造方法，其中形成一 薄膜之后，再将该导电薄膜 进行烘干。
PCT/CN2013/072776 2012-03-21 2013-03-16 触控面板之导电薄膜及其制造方法 WO2013139240A1 (zh)

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