WO2013170682A1 - 触控面板及其制作方法 - Google Patents

触控面板及其制作方法 Download PDF

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Publication number
WO2013170682A1
WO2013170682A1 PCT/CN2013/074339 CN2013074339W WO2013170682A1 WO 2013170682 A1 WO2013170682 A1 WO 2013170682A1 CN 2013074339 W CN2013074339 W CN 2013074339W WO 2013170682 A1 WO2013170682 A1 WO 2013170682A1
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WO
WIPO (PCT)
Prior art keywords
sensing electrodes
touch panel
planar surface
upper cover
cover substrate
Prior art date
Application number
PCT/CN2013/074339
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English (en)
French (fr)
Inventor
李裕文
夏祥龙
陈�峰
Original Assignee
宸鸿科技(厦门)有限公司
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Publication of WO2013170682A1 publication Critical patent/WO2013170682A1/zh

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02Bases, casings, or covers
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412Digitisers structurally integrated in a display
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/047Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using sets of wires, e.g. crossed wires
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate

Definitions

  • the invention relates to a touch panel and a manufacturing method thereof, and in particular to a non-planar touch panel and a manufacturing method thereof.
  • PDAs personal digital assistants
  • mobile phones mobile phones
  • Touch panels are widely used in portable electronic products such as notebooks and tablet PCs.
  • portable electronic products such as notebooks and tablet PCs.
  • notebooks and tablet PCs As a human machine interface.
  • touch panels In order to meet the demand for thin and light electronic products, today's touch panels have the technology of integrating touch glass and protective glass, which means that the touch electrodes are directly fabricated on the protective glass. This technology can save the original use of the touch control.
  • the touch glass of the electrode effectively reduces the overall thickness of the touch panel and reduces the cost of the touch panel.
  • the lithography process of the touch panel which directly forms the touch electrode directly on the protective glass for example, including sputtering photoresist, ultraviolet exposure, etc., it can only be applied to a planar structure. Because if the photoresist is made of a wet film, coating unevenness may occur on a non-planar structure due to good fluidity. If the photoresist is a dry film, it may not meet the thinness of actual demand; in addition, since the non-planar structure has The height difference makes the UV exposure cause uneven line width and line spacing. Therefore, the touch panel directly formed on the protective glass can not be attached and applied to the non-planar display device, which limits the application of the touch panel.
  • the invention provides a touch panel and a manufacturing method thereof, which use a reinforced upper cover substrate having a non-planar surface as a touch substrate, and is further matched with a patterned process of a modified touch electrode to produce
  • the non-planar touch panel is effectively applied to various non-planar display devices to increase the application of the touch panel.
  • the present invention provides a touch panel including a reinforced upper cover substrate, the reinforced upper cover substrate includes a first non-planar surface, and the reinforced upper cover substrate is planned with a display area and a surrounding display area. Peripheral area, and a touch electrode layer, Formed on the first non-planar surface by a patterning process comprising spray photoresist and laser exposure, and encompassing the display region and at least a portion of the peripheral region.
  • the first non-planar surface is a smooth curved surface or a surface formed by at least two facets, wherein an angle is formed between the two facets.
  • the touch panel further includes: a lead structure disposed in the peripheral region and electrically connected to the touch electrode layer; and a shielding layer disposed substantially in the peripheral region and disposed between the strengthened upper cover substrate and the lead structure.
  • the lead structure and the shielding layer are respectively formed by the patterning process technology including spray photoresist and laser exposure.
  • touch panel A protective layer is disposed on the display area and the peripheral area for covering the touch electrode layer and the lead structure.
  • the touch electrode layer includes: a plurality of first sensing electrodes arranged in parallel along a first axial direction of the reinforcing upper cover substrate; and a plurality of second sensing electrodes along a second axis of the reinforcing upper cover substrate
  • the semiconductor electrodes are arranged in parallel with each other; wherein the first sensing electrodes and the second sensing electrodes are staggered and insulated from each other.
  • first sensing electrode and the second sensing electrode are formed on the first non-planar surface.
  • the touch electrode layer further includes an insulating layer formed between the first sensing electrodes and the second sensing electrodes.
  • the reinforced upper cover substrate further includes a second non-planar surface corresponding to the first non-planar surface.
  • first sensing electrode is formed on the first non-planar surface
  • second sensing electrode is formed on the second non-planar surface
  • the second non-planar surface is a smooth curved surface or a surface formed by at least two facets, wherein an angle is formed between the two facets.
  • Each of the first sensing electrodes includes a plurality of first conductive units and a plurality of first conductive lines, the first conductive lines connecting the first axially adjacent two first conductive units; and each of the plurality of The second sensing electrode includes a plurality of second conductive units and a plurality of second conductive lines, wherein the second conductive lines are connected to the second axially adjacent two second conductive units; wherein the first sensing electrodes and the plurality of The two sensing electrodes are staggered at positions of the first wires and the second wires.
  • the present invention also provides a method for manufacturing a touch panel, comprising the steps of: first providing a reinforced upper cover substrate comprising a first non-planar surface, wherein the reinforced upper cover substrate is planned to have a display area and a surrounding surrounding the display area The surrounding area. Then, a touch electrode layer is formed on the first non-planar surface of the reinforced upper cover substrate by a photoresist process and a laser exposure patterning process, and is covered by the display area and at least a portion of the peripheral area.
  • the first non-planar surface is a curved surface or a surface formed by at least two facets, wherein an angle is formed between the two facets.
  • the method of manufacturing the touch panel further includes: forming a lead structure in the peripheral region to electrically connect the touch electrode layer; and forming a shielding layer to be completely located in the peripheral region and disposed between the strengthened upper cover substrate and the lead structure;
  • the step of forming the lead structure and the step of forming the shielding layer respectively adopts the patterning process technology including spray photoresist and laser exposure.
  • the method of manufacturing the touch panel further includes: forming a first protective layer on the display area and the peripheral area to cover the touch electrode layer and the lead structure.
  • the step of forming the touch electrode layer further includes: forming a plurality of first sensing electrodes and a plurality of second sensing electrodes on the first non-planar surface, wherein the first sensing electrodes are arranged in parallel along a first axial direction The second sensing electrodes are arranged in parallel along a second axial direction, wherein the first sensing electrodes are interlaced with the second sensing electrodes; and an insulating layer is formed on the first sensing electrodes and the The first sensing electrodes and the second sensing electrodes are insulated from each other between the two sensing electrodes.
  • the reinforced upper cover substrate further includes a second non-planar surface corresponding to the first non-planar surface.
  • the step of forming the touch electrode layer further includes: forming a plurality of first sensing electrodes on the first non-planar surface and arranging them in parallel along a first axial direction; and forming a plurality of second sensing electrodes on the second The non-planar surfaces are arranged in parallel along a second axis; wherein the first sensing electrodes and the second sensing electrodes are staggered and insulated from each other.
  • the second non-planar surface is a smooth curved surface or a surface formed by at least two facets, wherein an angle is formed between the two facets.
  • the touch panel and the manufacturing method thereof are not only thin and thin, but also cost-reducing, and can be widely applied to various non-planar layers by adopting a non-planar reinforced cover substrate design.
  • Display devices, and non-planar structures have more enhanced structural properties than flat-panel substrates.
  • FIG. 1 is a top plan view of a first preferred embodiment of the present invention.
  • Figure 2 is a cross-sectional view of the cross-sectional line A-A' of Figure 1.
  • FIG. 3 is a partially enlarged schematic view showing the first preferred embodiment of the present invention.
  • FIG. 4 is a flow chart showing a manufacturing method of the first embodiment of the touch panel of the present invention.
  • FIG. 5 is a cross-sectional view showing the structure of a second embodiment of the touch panel of the present invention.
  • FIG. 6 is a cross-sectional view showing the structure of a third embodiment of the touch panel of the present invention.
  • FIG. 1 is a top view of a first preferred embodiment of the present invention
  • FIG. 2 is a cross-sectional view of FIG. Schematic diagram of A-A ', Figure 3
  • a partially enlarged schematic view of a first preferred embodiment of the present invention is shown.
  • the drawings of the embodiments are merely illustrative to make the invention easier to understand, and the detailed proportions thereof can be adjusted according to the needs of the design.
  • the touch panel 100 of the present embodiment includes a reinforced upper cover substrate 110, and the reinforced upper cover substrate 110 A first non-planar surface 112 is included.
  • the upper cover substrate 110 is planned to display a display area 120 and a peripheral area 130, and the peripheral area 130 surrounds the display area 120.
  • the display area 120 is, for example, a visible area of a conventional touch panel
  • the peripheral area 130 can be a non-transparent mask area.
  • First non-planar surface 112 It may be a smooth curved surface or a surface composed of at least two facets, and an angle between the two facets.
  • the touch electrode layer 122 in this embodiment is formed on the first non-planar surface 112 and is included in the display area 120. And at least a portion of the perimeter area 130.
  • the touch electrode layer 122 includes a plurality of first sensing electrodes 124 arranged in parallel along a first axial direction (X-axis) of the reinforced upper cover substrate 110. And a plurality of second sensing electrodes 126 arranged in parallel along a second axial direction (Y axis) of the reinforcing upper cover substrate 110.
  • First sensing electrode 124 and second sensing electrode 126 Presenting staggered and insulated from each other.
  • the first sensing electrode 124 and the second sensing electrode 126 of this embodiment are formed on the first non-planar surface 112 as well.
  • each of the first sensing electrodes 124 includes a plurality of first conductive units 152 and a plurality of first conductive lines 154.
  • the first conductive lines 154 are connected to two adjacent first conductive units 152 on the X-axis; and each of the second sensing electrodes 126 includes a plurality of second conductive units 156 and a plurality of second conductive lines 158.
  • the second wires 158 are connected to two adjacent second conductive units 156 on the Y-axis.
  • each of the first sensing electrodes 124 is composed of a plurality of first conductive units 152 and a plurality of first conductors 154 is connected in series; each second sensing electrode 126 is formed by connecting a plurality of second conductive units 156 and a plurality of second wires 158 in series.
  • the second sensing electrodes 126 are staggered at the positions of the first wires 154 and the second wires 158.
  • the touch electrode layer 122 further includes an insulating layer 127 on the first sensing electrodes 124 and the second sensing electrodes 126.
  • the staggered position is formed between the first wire 154 and the second wire 158 to insulate the first sensing electrode 124 from the second sensing electrodes 126 from each other to avoid the first sensing electrode 124.
  • the second sensing electrode 126 is electrically connected to each other, affecting the touch sensing function and failing to receive the signal correctly.
  • the first conductive line 154 of the first sensing electrode 124 is structurally insulated by the insulating layer 127.
  • the setting is to form a bridge structure.
  • the touch panel 100 of the present embodiment further includes a lead structure 132 located in the peripheral region 130 and electrically connected to the touch electrode layer. 122. More specifically, the lead structure 132 may include, for example, a plurality of connecting lines electrically connected to the first sensing electrode 124 and the second sensing electrode 126, respectively.
  • the driving signal is transmitted to the touch electrode layer 122, and the sensing signal on the touch electrode layer 122 is transmitted to the back end control processor (not shown) for operation analysis.
  • the touch panel 100 A shielding layer 134 is further disposed on the peripheral region 130 and disposed between the reinforcing upper cover substrate 110 and the lead structure 132, and the shielding layer 134 It is usually formed of a black opaque material, such as a black photoresist, to shield all components and circuit traces located in the peripheral region 130, for example, to shield the lead structure 132 for aesthetic effects.
  • a black opaque material such as a black photoresist
  • the touch panel 100 of the embodiment further includes a protective layer 140 located in the display area 120 and the peripheral area 130.
  • the cover electrode layer 122 and the lead structure 132 are covered to prevent the touch electrode layer 122 and the lead structure 132 from being damaged by chemical changes or physical influences.
  • the materials to which the components are applied or their optional groups are as follows:
  • the upper cover substrate 110 is reinforced.
  • it may be a glass, and a surface thereof is covered with a reinforcing layer to form a rigid glass, so that the reinforced upper cover substrate 110 of the present embodiment can be used not only to provide the sensing electrode layer 122.
  • the role is used to protect the upper cover.
  • the reinforced upper cover substrate 110 is not limited to one-sided or double-sided non-planar, and is not limited to a curved surface or a multi-faceted combination.
  • First sensing electrode 124 and second sensing electrode 126 It can be composed of a transparent conductive material, including indium tin oxide (ITO), indium zinc oxide (IZO), and cadmium tin oxide.
  • ITO indium tin oxide
  • IZO indium zinc oxide
  • CTO transparent conductive material
  • AZO aluminum zinc oxide
  • ITZO indium tin zinc oxide
  • ITZO indium tin zinc oxide
  • ITZO indium tin
  • zinc oxide cadmium oxide, hafnium oxide, HfO
  • the lead structure 132 may comprise a conductive metal such as silver, copper or aluminum, and an insulating layer.
  • Materials may include insulating materials such as Polyimide (PI), silicon oxide (SiO2), silicon nitride (SiN), silicon oxynitride (SiCN), silicon carbide (SiC), etc.
  • the protective layer 140 may include inorganic materials such as silicon nitride, silicon oxide, and silicon oxynitride. (silicon oxynitride), or organic materials such as acrylic resins and other suitable materials. But not limited to the above.
  • this embodiment is to make the components on the first non-planar surface 112. Therefore, the high-pressure spraying method is used to compress the photoresist at a high pressure and then spray it on a non-planar surface, and the sprayed photoresist will be atomized to uniformly cover the non-planar surface, thereby solving the general use of the sputtering photoresist. In this way, the problem of uneven coating of the photoresist is generated on the non-planar surface.
  • the embodiment further adopts a laser as a light source for exposure, and since the beam diameter tolerance of the laser exposure is extremely small, it can solve the problem of using ultraviolet rays on the non-planar surface. (UV)
  • UV ultraviolet rays
  • the exposure light distance of the laser light source used in this embodiment is within ⁇ 5 ⁇ m, which has a good effect on the control of the line width.
  • a reinforced upper cover substrate 110 including a first non-planar surface 112 is provided (step S401).
  • the upper cover substrate is strengthened 110 has a display area 120 and a peripheral area 130 surrounding the display area 120.
  • a patterned masking layer 134 is then formed using a patterning process technique including spray photoresist and laser exposure. To be fully located in the surrounding area 130 (step S403).
  • a patterned process technology including spray photoresist and laser exposure is also used to form a patterned touch electrode layer 122 to strengthen the upper cover substrate.
  • the first non-planar surface 112 of 110 (step S405), and the range of the touch electrode layer 122 covers the display area 120 and at least a portion of the peripheral area 130 .
  • the step of forming the touch electrode layer 122 further includes: forming a plurality of first sensing electrodes 124 and a plurality of second sensing electrodes 126 on the first non-planar surface 112
  • the first sensing electrodes 124 are arranged in parallel along a first axial direction (X-axis)
  • the second sensing electrodes 126 are arranged in parallel along a second axial direction (Y-axis)
  • the first sensing electrodes 124 are The second sensing electrodes 126 are interdigitated with each other.
  • a patterned insulating layer 127 is formed on the first sensing electrodes 124 by using a patterning process technique including spray photoresist and laser exposure.
  • the first sensing electrodes 124 and the second sensing electrodes 126 are insulated from each other.
  • each of the first sensing electrodes 124 is known by the structure of the present invention from a plurality of first conductive units 152 and a plurality of first conductors 154 is connected in series; each second sensing electrode 126 is formed by connecting a plurality of second conductive units 156 and a plurality of second wires 158 in series.
  • a plurality of first conductive units 152 may be formed first.
  • a plurality of first conductive lines 154 and a plurality of second conductive units 156 wherein the first conductive unit 152 and the first conductive line 154 are electrically connected to each other in the first axial direction to be connected in series to form the first sensing electrode 124.
  • An insulating layer 127 is then formed to be disposed over each of the first wires 154. Finally, a plurality of second wires 158 are formed on the insulating layer 127 Upper and electrically connected to the second axially adjacent two second conductive units 156 to be connected in series to form the second sensing electrode 126 and reach the first sensing electrode 124 and the second sensing electrodes 126 The effect of insulating each other.
  • a patterned routing structure 132 comprising a spray photoresist and a laser exposure is used to form a patterned lead structure 132 in the peripheral region 130 ( Step S409) is electrically connected to the first axial electrode 124 and the second axial electrode 126.
  • the shielding layer 134 formed as described above is disposed on the reinforced upper cover substrate 110. And between the lead structures 132, thereby shielding the lead structure 132.
  • the lead structure 132 is preferably made of a metal material having good conductivity to increase the conduction rate.
  • the touch electrode layer 122, the lead structure 132 and the shielding layer 134 are used.
  • a protective layer 140 is formed on the display area 120 and the peripheral area 130 (step S411) for covering the touch electrode layer. 122 and the lead structure 132 prevent the touch electrode layer 122 and the lead structure 132 from being damaged by chemical changes or physical influences.
  • FIG. 5 A schematic cross-sectional view showing a second embodiment of the touch panel of the present invention is shown.
  • the present embodiment provides a touch panel 200, which is different from the first embodiment of the present invention in the shielding layer of the embodiment.
  • 134 is formed after the touch electrode layer 122 is completed, that is, the shielding layer 134 is located between the touch electrode layer 122 and the lead structure 132.
  • the touch panel of this embodiment The 200 further includes a plurality of conductive pastes 160 for electrically connecting the first sensing electrodes 124 and the second sensing electrodes 126 to the lead structures 132 .
  • the conductive paste 160 can be disposed in the display area 120 in addition to the transparent conductive paste as in this embodiment.
  • a conductive paste of the same color as the shielding layer 134 may be used to fill the shielding layer 134 having a perforated structure to achieve an electrical connection.
  • conductive adhesive 160 The selection may be different according to actual design requirements, and is not limited by the present invention.
  • the touch electrode layer 122 of the present invention is not limited to being formed only on the reinforced upper cover substrate 110. On the specific side, the touch electrode layer 122 may be layered to form both sides of the reinforced cover substrate 110. See the third embodiment of the present invention.
  • Figure 6 A schematic cross-sectional view showing a structure of a third embodiment of the touch panel of the present invention.
  • This embodiment provides a touch panel 300, which is different from the first embodiment of the present invention in that the touch panel 300 of the present embodiment Further comprising a second non-planar surface 114 corresponding to the first non-planar surface 112. Wherein the second non-planar surface 114 It may be a smooth curved surface or a surface composed of at least two facets, and an angle between the two facets.
  • the first sensing electrode 124 of the embodiment is formed on the first non-planar surface 112, and the second sensing electrode 126 Formed on the second non-planar surface 114. That is, a plurality of first sensing electrodes 124 arranged in parallel along the first direction are respectively formed on the two non-planar surfaces of the reinforced upper cover substrate 110. And a plurality of second sensing electrodes 126 arranged in parallel along the second direction. Under this structure, the upper cover substrate 110 is strengthened to have the function of an insulating layer, so that the first sensing electrode 124 and the second sensing electrode 126 The touch formation is interlaced and insulated from each other for touch sensing.
  • a lead structure 132 is further formed to be electrically connected to the first sensing electrode 124 and the second sensing electrode 126.
  • a protective layer is formed 140 comprehensively covering the lead structure 132 and the first sensing electrode 124, and forming a hard coating 142 (Hard Coating) comprehensively covering the lead structure 132 And a second sensing electrode 126.
  • the present invention provides a non-planar touch panel and a manufacturing method thereof.
  • the patterning process of the present invention replaces the sputtering resist and the ultraviolet exposure by spraying photoresist and laser exposure respectively, thereby implementing touch.
  • the electrode layer, the lead structure and the shielding layer are on a non-planar substrate.
  • the touch panel manufactured by the embodiment of the present invention has the deepest surface stress layer Above 20 ⁇ m, the surface stress can reach more than 800Mpa.
  • the touch panel and the manufacturing method thereof of the present invention not only have the characteristics of being light and thin and cost-reducing, but also can be widely applied to various non-planar display devices due to the design of the non-planar reinforced upper cover substrate. And the non-planar structure has more enhanced structural characteristics than the flat substrate.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)
  • Manufacture Of Switches (AREA)

Abstract

本发明提供一种触控面板,包含有一强化上盖基板以及一触控电极层,该强化上盖基板包含一第一非平面表面,并且该强化上盖基板规划有一显示区以及一围绕该显示区的周边区,该触控电极层形通过一包含喷涂光阻及雷射曝光的图案化制程来形成于该第一非平面表面,并且涵盖于该显示区及至少部分的该周边区,以制作出非平面式的触控面板。

Description

触控面板及其制作方法 技术领域
本发明有关于一种触控面板及其制作方法,且特别关于一种非平面式触控面板及其制作方法。
背景技术
在现今各式消费性电子产品的市场中,个人数字助理 (PDA) 、移动电话 (mobile Phone) 、笔记本电脑 (notebook) 及平板计算机 (tablet PC) 等可携式电子产品皆已广泛的使用触控面板 (touch panel) 作为人机界面。
为符合电子产品轻薄化的需求,现今触控面板已具有将触控玻璃与保护玻璃一体化的技术,意即将触控电极直接制作于保护玻璃上,此技术可省去原本用来承载触控电极的触控玻璃,有效地缩减触控面板的整体厚度及降低触控面板的成本。
然而,由于一般将触控电极直接制作于保护玻璃的触控面板的微影制程技术,例如包含溅镀光阻、紫外线曝光等,仅能适用于平面结构。因为若光阻采用湿膜,则因流动性佳而导致在非平面结构上会造成涂布不均,若光阻采用干膜,则无法符合实际需求的薄度;另外,由于非平面结构具有高度差,使得紫外线曝光会导致线宽及线距不均匀。也就因此,将触控电极直接制作于保护玻璃的触控面板无法与非平面的显示设备进行贴合与应用,局限了触控面板的应用性。
目前有发展出将触控电极制作于非平面结构上的技术,但是由于制程步骤繁琐并且需搭配特殊材质的导电层才得以实现,例如铺附分散用溶剂、使用清洗用溶剂去除分散用溶剂、蒸发清洗用溶剂等一连串的堆积步骤。因此,要如何在不增加制程及改变导电层材料的情况下,有效地实现将触控电极直接制作于保护玻璃的非平面触控面板也就是目前值得加以研究发展的地方。
发明内容
本发明提供一种触控面板及其制作方法,其使用具有非平面表面的强化上盖基板来做为触控基板,并且再搭配经设计改良过的触控电极的图案化制程,以制作出非平面式的触控面板,以达到有效地应用于各种非平面的显示设备,增加触控面板应用性的目的。
为达上述目的,本发明提供一种触控面板,包含有一强化上盖基板,该强化上盖基板包含一第一非平面表面,并且该强化上盖基板规划有一显示区以及一围绕该显示区的周边区,以及一触控电极层, 通 过一包含喷涂光阻及雷射曝光的图案化制程来形成于该第一非平面表面,并且涵盖于该显示区及至少部分的该周边区。
进一步的, 所述 第一非平面表面为一平滑曲面或一由至少两棱面所构成的表面,其中该两棱面之间形成一夹角。
进一步的, 所述 触控面板 更包括:一引线结构,位于该周边区,并且电性连接该触控电极层;及一遮蔽层,全面位于该周边区,并且设置于该强化上盖基板及该引线结构之间。
进一步的, 所述引线结构及该遮蔽层分别 通 过 该包含喷涂光阻及雷射曝光的图案化制程技术所形成。
进一步的, 所述 触控面板 更包括一保护层,位于该显示区及该周边区,用以覆盖该触控电极层及该引线结构。
进一步的, 所述触控电极层包括:复数个第一感应电极,沿该强化上盖基板的一第一轴向来平行排列;及复数个第二感应电极,沿该强化上盖基板的一第二轴向来平行排列;其中,该些第一感应电极与该些第二感应电极形成交错并且彼此绝缘。
进一步的, 所述第一感应电极及所述第二感应电极形成于该第一非平面表面。
进一步的, 所述触控电极层进一步包括一绝缘层,形成于该些第一感应电极及该些第二感应电极之间。
进一步的, 所述强化上盖基板进一步包含一对应于该第一非平面表面的第二非平面表面。
进一步的, 所述第一感应电极形成于该第一非平面表面,而所述第二感应电极形成于该第二非平面表面。
进一步的, 所述第二非平面表面为一平滑曲面或一由至少两棱面所构成的表面,其中该两棱面之间形成一夹角。
进一步的, 每一该些第一感应电极包含复数个第一导电单元及复数个第一导线,该些第一导线连接该第一轴向上相邻的两个第一导电单元;而每一该些第二感应电极包含复数个第二导电单元及复数个第二导线,该些第二导线连接该第二轴向上相邻的两个第二导电单元;其中该些第一感应电极及该些第二感应电极在该些第一导线及该些第二导线的位置形成交错。
本发明亦提供一种触控面板的制造方法,包含以下步骤:首先提供一包含一第一非平面表面的强化上盖基板,其中该强化上盖基板规划有一显示区及一围绕该显示区的周边区。接着以喷涂光阻及雷射曝光的图案化制程技术,形成一触控电极层于该强化上盖基板的该第一非平面表面,并且涵盖于该显示区及至少部分的该周边区。
进一步的, 所述第一非平面表面为一曲面或一由至少两棱面所构成的表面,其中该两棱面之间形成一夹角。
进一步的, 所述 触控面板的制造方法 更包括:形成一引线结构于该周边区,以电性连接该触控电极层;及形成一遮蔽层,以全面位于该周边区并且设置于该强化上盖基板及该引线结构之间;其中,该形成引线结构及该形成遮蔽层的步骤分别采用该包含喷涂光阻及雷射曝光的图案化制程技术。
进一步的, 所述 触控面板的制造方法 更包括:形成一第一保护层于该显示区及该周边区,用以覆盖该触控电极层及该引线结构。
进一步的, 所述形成触控电极层的步骤进一步包括:形成复数个第一感应电极及复数个第二感应电极于该第一非平面表面,其中该些第一感应电极沿一第一轴向来平行排列,该些第二感应电极沿一第二轴向来平行排列,其中该些第一感应电极与该些第二感应电极形成交错;及形成一绝缘层于该些第一感应电极及该些第二感应电极之间,使该些第一感应电极与该些第二感应电极彼此绝缘。
进一步的, 所述强化上盖基板进一步包含一对应于该第一非平面表面的第二非平面表面。
进一步的, 所述形成触控电极层的步骤进一步包括:形成复数个第一感应电极于该第一非平面表面,并沿一第一轴向来平行排列;及形成复数个第二感应电极于该第二非平面表面,并沿一第二轴向来平行排列;其中,该些第一感应电极与该些第二感应电极形成交错并且彼此绝缘。
进一步的, 所述第二非平面表面为一平滑曲面或一由至少两棱面所构成的表面,其中该两棱面之间形成一夹角。
基于上述,本发明所提供的触控面板及其制作方法不仅本身即具有轻薄化及降低成本的特点,更因采用非平面式的强化上盖基板的设计而可广泛地应用于各种非平面显示设备,并且相较于平板式的基板而言,非平面的结构具有更为强化的结构特性。
附图说明
图 1 绘示了本发明第一较佳实施例的上视示意图。
图 2 绘示了图 1 沿剖面线 A-A '的剖面示意图。
图 3 绘示了本发明第一较佳实施例局部放大示意图。
图 4 绘示了本发明触控面板的第一实施例的制造方法的流程图。
图 5 绘示了本发明触控面板的第二实施例的结构剖面示意图。
图 6 绘示了本发明触控面板的第三实施例的结构剖面示意图。
具体实施方式
为使熟习本发明所属技术领域的一般技艺者能更进一步了解本发明,下文特列举本发明的较佳实施例,并配合所附图式,详细说明本发明的构成内容及所欲达成的功效。
请参考图 1 至图 3 。图 1 绘示了本发明第一较佳实施例的上视示意图,图 2 绘示了图 1 沿剖面线 A-A '的剖面示意图,图 3 绘示了本发明第一较佳实施例局部放大示意图。为了方便说明,本实施例的各图式仅为示意以更容易了解本发明,其详细的比例可依照设计的需求进行调整。
本实施例的触控面板 100 包含有一强化上盖基板 110 ,并且该强化上盖基板 110 包含有一第一非平面表面 112 。其中强化上盖基板 110 规划一显示区 120 以及一周边区 130 ,周边区 130 围绕显示区 120 。一般而言,显示区 120 例如为***面表面 112 可以为一平滑的曲面或是由至少两棱面所构成的表面,且两棱面之间具有一夹角。
本实施例中的触控电极层 122 形成于第一非平面表面 112 ,并且涵盖于显示区 120 及至少部分的周边区 130 。触控电极层 122 包含有复数条沿着强化上盖基板 110 的第一轴向 (X 轴 ) 平行排列的第一感应电极 124 以及复数条沿着强化上盖基板 110 的第二轴向 (Y 轴 ) 平行排列的第二感应电极 126 。第一感应电极 124 以及第二感应电极 126 呈现交错排列且互相绝缘。本实施例的第一感应电极 124 与第二感应电极 126 是同样形成于第一非平面表面 112 。
进一步说明的是,各第一感应电极 124 包含复数个第一导电单元 152 及复数个第一导线 154 ,该些第一导线 154 连接 X 轴上相邻的两个第一导电单元 152 ;而各第二感应电极 126 包含复数个第二导电单元 156 及复数个第二导线 158 ,该些第二导线 158 连接 Y 轴上相邻的两个第二导电单元 156 。换句话说,每一条第一感应电极 124 由复数个第一导电单元 152 以及复数条第一导线 154 串接而成;每一条第二感应电极 126 由复数个第二导电单元 156 以及复数条第二导线 158 串接而成。其中该些第一感应电极 124 及该些第二感应电极 126 在该些第一导线 154 及该些第二导线 158 的位置形成交错。
此外,触控电极层 122 另包含一绝缘层 127 位于该些第一感应电极 124 与该些第二感应电极 126 的交错位置,并形成于第一导线 154 及第二导线 158 之间,使该些第一感应电极 124 与该些第二感应电极 126 彼此绝缘,避免第一感应电极 124 与第二感应电极 126 相互导通干扰,影响触控感应功能而无法正确接收信号。如此一来,在架构上,第一感应电极 124 的第一导线 154 藉由绝缘层 127 的设置而得以形成一架桥结构。
本实施例的触控面板 100 另包含有一引线结构 132 位于周边区 130 内,并且电性连接触控电极层 122 。更具体来讲,引线结构 132 可例如包含复数条连接线,分别对应电性连接第一感应电极 124 以及第二感应电极 126 ,藉以将驱动信号传送至触控电极层 122 ,并将触控电极层 122 上的感测信号传送至后端控制处理器 ( 图未示 ) 进行运算解析。此外,触控面板 100 还包含一遮蔽层 134 ,全面位于周边区 130 且设置于强化上盖基板 110 以及引线结构 132 之间,遮蔽层 134 通常由黑色不透光材质,如黑色光阻所形成,用以遮蔽所有对应位于周边区 130 内的组件及电路走线,例如可遮蔽引线结构 132 ,达到美观效果。
此外,本实施例的触控面板 100 更包含一保护层 140 ,位于显示区 120 以及周边区 130 ,用以覆盖触控电极层 122 以及引线结构 132 ,避免触控电极层 122 以及引线结构 132 因化学变化或物理作用影响而损害。
针对本发明第一实施例,各组件所适用的材料或其可选用的群组如下:强化上盖基板 110 可例如为一玻璃,并在其表面覆盖强化层而形成一刚性玻璃,让本实施例的强化上盖基板 110 不仅可以用来提供承载感测电极层 122 之作用,更是用来作为保护上盖的作用。其中,强化上盖基板 110 并不限于单面或双面非平面,也不限于曲面或多面组合。第一感应电极 124 、第二感应电极 126 可由透明导电材料所组成,包含氧化铟锡( indium tin oxide, ITO )、氧化铟锌 (indium zinc oxide, IZO) 、氧化镉锡 (cadmium tin oxide, CTO) 、氧化铝锌 (aluminum zinc oxide, AZO) 、氧化铟锌锡 (indium tin zinc oxide, ITZO) 、氧化锌 (zinc oxide) 、氧化镉 (cadmium oxide) 、氧化铪 (hafnium oxide, HfO) 、氧化铟镓锌 (indium gallium zinc oxide, InGaZnO) 、氧化铟镓锌镁 (indium gallium zinc magnesium oxide, InGaZnMgO) 、氧化铟镓镁 (indium gallium magnesium oxide, InGaMgO) 或氧化铟镓铝 (indium gallium aluminum oxide, InGaAlO) 等。此外,本实施例的第一感应电极 124 的第一导线 154 更可进一步采用金属材质的设计,藉以让第一导线 154 所形成的架桥结构得以较为坚固而不易断裂。再者,引线结构 132 可包含导电金属如银、铜或铝等,绝缘层 127 材料可包括绝缘材质,例如聚亚酰胺 (Polyimide,PI) 、氧化硅 (SiO2) 、氮化硅 (SiN) 、氮氧化硅 (SiCN) 、碳化硅 (SiC) 等。保护层 140 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) 、或是有机材料,例如丙烯酸类树脂 (acrylic resin) 及其它适合的材料。但不以上述为限。
值得注意的是,本实施例为使各组件制作于第一非平面表面 112 上,故使用高压喷涂方式将光阻以高压压缩后再喷涂于非平面表面之上,喷出的光阻将会雾化,可均匀覆盖于非平面表面,藉以解决一般使用溅镀光阻的方式在非平面表面上会产生光阻涂布不均的问题。另外,由于非平面表面有高度差,因此本实施例进一步采用以雷射作为光源进行曝光,由于雷射曝光的光束直径公差极小,因此能解决在非平面表面上用紫外线 (UV) 曝光所导致的线宽及线距不均匀的问题。本实施例所使用的雷射光源的曝光线距于± 5 μ m 以内,对于线宽的控制具有良好效果。
为了进一步说明本发明的触控面板的制程,请基于图 2 的剖面架构来参考图 4 ,为本发明触控面板的第一实施例的制造方法的流程图。首先,提供一包含一第一非平面表面 112 的强化上盖基板 110( 步骤 S401) 。其中,强化上盖基板 110 规划有一显示区 120 及一围绕显示区 120 的周边区 130 。接着采用一包含喷涂光阻及雷射曝光的图案化制程技术来形成一图案化的遮蔽层 134 以全面位于周边区 130( 步骤 S403) 。
接下来,同样采用包含喷涂光阻及雷射曝光的图案化制程技术来形成一图案化的触控电极层 122 于强化上盖基板 110 的第一非平面表面 112( 步骤 S405) ,并且触控电极层 122 的范围涵盖于显示区 120 及至少部分的周边区 130 。其中,上述形成触控电极层 122 的步骤进一步包括:形成复数个第一感应电极 124 及复数个第二感应电极 126 于第一非平面表面 112 ,该些第一感应电极 124 沿一第一轴向 (X 轴 ) 平行排列,该些第二感应电极 126 沿一第二轴向 (Y 轴 ) 平行排列,并且该些第一感应电极 124 与该些第二感应电极 126 彼此形成交错。之后,采用包含喷涂光阻及雷射曝光的图案化制程技术来形成一图案化的绝缘层 127 于该些第一感应电极 124 及该些第二感应电极 126 之间 ( 步骤 S407) ,使该些第一感应电极 124 与该些第二感应电极 126 彼此绝缘。
更具体来讲,由本发明结构已知每一条第一感应电极 124 由复数个第一导电单元 152 以及复数条第一导线 154 串接而成;每一条第二感应电极 126 由复数个第二导电单元 156 以及复数条第二导线 158 串接而成。本实施例可先形成复数个第一导电单元 152 、复数条第一导线 154 及复数个第二导电单元 156 ,其中第一导电单元 152 及第一导线 154 是于第一轴向上彼此相互电性连接,以串接成为第一感应电极 124 。接着再形成绝缘层 127 以设置于各第一导线 154 上方。最后再形成复数条第二导线 158 设置于绝缘层 127 上方并且电性连接第二轴向上相邻的两个第二导电单元 156 ,以串接成为第二感应电极 126 ,并且达到第一感应电极 124 与该些第二感应电极 126 彼此绝缘的效果。
接着,采用包含喷涂光阻及雷射曝光的图案化制程技术来形成一图案化的引线结构 132 于周边区 130( 步骤 S409) ,以电性连接第一轴向电极 124 以及第二轴向电极 126 。如此一来,前述所形成的遮蔽层 134 即是设置于强化上盖基板 110 及引线结构 132 之间,藉以达到遮蔽引线结构 132 的作用。此外,引线结构 132 较佳由导电性良好的金属材质所构成,以增加传导速率。
值得一提的是,由于本实施例是将触控电极层 122 、引线结构 132 及遮蔽层 134 制作于强化上盖基板 110 的第一非平面表面 112 。因此,在上述的图案化制程中是采用喷涂光阻及雷射曝光等制程技术来实现,藉以避免产生光阻涂布不均匀及线宽、线距不均匀等问题。
最后,形成一保护层 140 于显示区 120 及周边区 130( 步骤 S411) ,用以覆盖触控电极层 122 及引线结构 132 ,避免触控电极层 122 以及引线结构 132 因化学变化或物理作用影响而损害。
下文将针对本发明的触控面板的不同实施样态进行说明,且为简化说明,以下说明主要针对各实施例不同处进行详述,而不再对相同处作重复赘述。此外,本发明的各实施例中相同的组件以相同的标号进行标示,以利于各实施例间互相对照。
本发明的第二实施例,如图 5 所示,图 5 绘示了本发明触控面板的第二实施例的结构剖面示意图。比较本发明的第一实施例,本实施例提供一触控面板 200 ,与本发明第一实施例不同处在于,本实施例的遮蔽层 134 在触控电极层 122 完成之后才形成,也就是说,遮蔽层 134 位在触控电极层 122 以及引线结构 132 之间。在此架构下,本实施例的触控面板 200 更包括复数个导电胶 160 用来将第一感应电极 124 及第二感应电极 126 电性连接于引线结构 132 。本实施例其余组件与步骤皆与本发明的第一实施例相同,在此不再赘述。此外,导电胶 160 的选用方式除了可如本实施例是采用透明导电胶设置在显示区 120 与周边区 130 的交界处之外,更可例如是采用与遮蔽层 134 相同颜色的导电胶来填充于具穿孔结构的遮蔽层 134 ,以达到电性连接的作用。然而导电胶 160 的选用更可依实际设计需求而有所不同,在此并非为本发明所限制。
值得一提的是,本发明的触控电极层 122 并不限于只形成于强化上盖基板 110 的特定一面,也可将触控电极层 122 分层来形成于强化上盖基板 110 的双面。请见本发明的第三实施例。如图 6 所示,图 6 绘示本发明触控面板的第三实施例的结构剖面示意图。本实施例提供一触控面板 300 ,与本发明第一实施例不同处在于,本实施例的触控面板 300 进一步包含一对应于该第一非平面表面 112 的第二非平面表面 114 。其中,第二非平面表面 114 可以为一平滑的曲面或是由至少两棱面所构成的表面,且两棱面之间具有一夹角。
本实施例的第一感应电极 124 形成于该第一非平面表面 112 ,而第二感应电极 126 形成于该第二非平面表面 114 。也就是说,在强化上盖基板 110 的两非平面表面分别形成复数条沿第一方向平行排列的第一感应电极 124 以及复数条沿第二方向平行排列的第二感应电极 126 。在此架构下,强化上盖基板 110 即具有绝缘层的功能,使得第一感应电极 124 以及第二感应电极 126 形成相互交错并且彼此绝缘而得以进行触控感测。之后,再形成一引线结构 132 与第一感应电极 124 以及第二感应电极 126 电性连接。最后,形成一保护层 140 全面性覆盖于引线结构 132 以及第一感应电极 124 ,以及形成一硬化涂层 142(Hard Coating) 全面性覆盖于引线结构 132 以及第二感应电极 126 。
综上所述,本发明提供一非平面式触控面板以及其制作方法,本发明的图案化制程是以喷涂光阻及雷射曝光来分别取代溅镀光阻及紫外线曝光,藉以实现触控电极层、引线结构及遮蔽层等在一非平面基板。藉由本发明的实施方式所制作的触控面板,其表面应力层最深可达 20 μ m 以上,表面应力值可达 800Mpa 以上。
因此,本发明的触控面板及其制作方法不仅本身即具有轻薄化及降低成本的特点,更因采用非平面式的强化上盖基板的设计而可广泛地应用于各种非平面显示设备,并且相较于平板式的基板而言,非平面的结构具有更为强化的结构特性。
以上所述仅为本发明的较佳实施例,凡依本发明申请专利范围所做的均等变化与修饰,皆应属本发明的涵盖范围。

Claims (20)

  1. 一种触控面板,其特征在于,包含: 一强化上盖基板,包含一第一非平面表面,并且该强化上盖基板规划有一显示区以及一围绕该显示区的周边区;以及 一触控电极层, 通 过 一包含喷涂光阻及雷射曝光的图案化制程来形成于该第一非平面表面,并且涵盖于该显示区及至少部分的该周边区。
  2. 如 权利要求 1 所述的触控面板,其特征在于,该第一非平面表面为一平滑曲面或一由至少两棱面所构成的表面,其中该两棱面之间形成一夹角。
  3. 如 权利要求 1 所述的触控面板,其特征在于,更包括:
    一引线结构,位于该周边区,并且电性连接该触控电极层;及
    一遮蔽层,全面位于该周边区,并且设置于该强化上盖基板及该引线结构之间。
  4. 如 权利要求 3 所述的触控面板,其特征在于,该引线结构及该遮蔽层分别 通 过 该包含喷涂光阻及雷射曝光的图案化制程技术所形成。
  5. 如 权利要求 3 所述的触控面板,其特征在于,更包括一保护层,位于该显示区及该周边区,用以覆盖该触控电极层及该引线结构。
  6. 如 权利要求 1 所述的触控面板,其特征在于,该触控电极层包括:
    复数个第一感应电极,沿该强化上盖基板的一第一轴向来平行排列;及
    复数个第二感应电极,沿该强化上盖基板的一第二轴向来平行排列;
    其中,该些第一感应电极与该些第二感应电极形成交错并且彼此绝缘。
  7. 如 权利要求 6 所述的触控面板,其特征在于,该些第一感应电极及该些第二感应电极形成于该第一非平面表面。
  8. 如 权利要求 7 所述的触控面板,其特征在于,该触控电极层进一步包括一绝缘层,形成于该些第一感应电极及该些第二感应电极之间。
  9. 如 权利要求 6 所述的触控面板,其特征在于,该强化上盖基板进一步包含一对应于该第一非平面表面的第二非平面表面。
  10. 如 权利要求 9 所述的触控面板,其特征在于,该些第一感应电极形成于该第一非平面表面,而该些第二感应电极形成于该第二非平面表面。
  11. 如 权利要求 9 所述的触控面板,其特征在于,该第二非平面表面为一平滑曲面或一由至少两棱面所构成的表面,其中该两棱面之间形成一夹角。
  12. 如 权利要求 6 所述的触控面板,其特征在于,每一该些第一感应电极包含复数个第一导电单元及复数个第一导线,该些第一导线连接该第一轴向上相邻的两个第一导电单元;而每一该些第二感应电极包含复数个第二导电单元及复数个第二导线,该些第二导线连接该第二轴向上相邻的两个第二导电单元;其中该些第一感应电极及该些第二感应电极在该些第一导线及该些第二导线的位置形成交错。
  13. 一种触控面板的制造方法,其特征在于,步骤包含:
    提供一包含一第一非平面表面的强化上盖基板,其中该强化上盖基板规划有一显示区及一围绕该显示区的周边区;及
    采用一包含喷涂光阻及雷射曝光的图案化制程技术来形成一触控电极层于该强化上盖基板的该第一非平面表面,并且涵盖于该显示区及至少部分的该周边区。
  14. 如 权利要求 13 所述的触控面板的制造方法,其特征在于,该第一非平面表面为一曲面或一由至少两棱面所构成的表面,其中该两棱面之间形成一夹角。
  15. 如 权利要求 13 所述的触控面板的制造方法,其特征在于,更包括:
    形成一引线结构于该周边区,以电性连接该触控电极层;及
    形成一遮蔽层,以全面位于该周边区并且设置于该强化上盖基板及该引线结构之间;
    其中,该形成引线结构及该形成遮蔽层的步骤分别采用该包含喷涂光阻及雷射曝光的图案化制程技术。
  16. 如 权利要求 15 所述的触控面板的制造方法,其特征在于,更包括:
    形成一第一保护层于该显示区及该周边区,用以覆盖该触控电极层及该引线结构。
  17. 如 权利要求 13 所述的触控面板的制造方法,其特征在于,该形成触控电极层的步骤进一步包括:
    形成复数个第一感应电极及复数个第二感应电极于该第一非平面表面,其中该些第一感应电极沿一第一轴向来平行排列,该些第二感应电极沿一第二轴向来平行排列,其中该些第一感应电极与该些第二感应电极形成交错;及
    形成一绝缘层于该些第一感应电极及该些第二感应电极之间,使该些第一感应电极与该些第二感应电极彼此绝缘。
  18. 如 权利要求 13 所述的触控面板的制造方法,其特征在于,该强化上盖基板进一步包含一对应于该第一非平面表面的第二非平面表面。
  19. 如 权利要求 18 所述的触控面板的制造方法,其特征在于,该形成触控电极层的步骤进一步包括:
    形成复数个第一感应电极于该第一非平面表面,并沿一第一轴向来平行排列;及
    形成复数个第二感应电极于该第二非平面表面,并沿一第二轴向来平行排列;
    其中,该些第一感应电极与该些第二感应电极形成交错并且彼此绝缘。
  20. 如 权利要求 18 所述的触控面板的制作方法,其特征在于,该第二非平面表面为一平滑曲面或一由至少两棱面所构成的表面,其中该两棱面之间形成一夹角。
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