WO2016123810A1 - Écran tactile capacitif et son procédé de fabrication - Google Patents

Écran tactile capacitif et son procédé de fabrication Download PDF

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Publication number
WO2016123810A1
WO2016123810A1 PCT/CN2015/072453 CN2015072453W WO2016123810A1 WO 2016123810 A1 WO2016123810 A1 WO 2016123810A1 CN 2015072453 W CN2015072453 W CN 2015072453W WO 2016123810 A1 WO2016123810 A1 WO 2016123810A1
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WO
WIPO (PCT)
Prior art keywords
conductive
region
substrate
conductive layer
touch screen
Prior art date
Application number
PCT/CN2015/072453
Other languages
English (en)
Chinese (zh)
Inventor
刘自鸿
余晓军
魏鹏
邹翔
周瑜
陈鑫
Original Assignee
深圳市柔宇科技有限公司
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.)
Filing date
Publication date
Application filed by 深圳市柔宇科技有限公司 filed Critical 深圳市柔宇科技有限公司
Priority to CN201580000929.7A priority Critical patent/CN105493014B/zh
Priority to PCT/CN2015/072453 priority patent/WO2016123810A1/fr
Publication of WO2016123810A1 publication Critical patent/WO2016123810A1/fr

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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

Definitions

  • the present invention relates to a touch screen, and more particularly to a capacitive touch screen and a method of fabricating the same.
  • the mainstream touch screen mainly comprises a protective cover, a glass or a film substrate, and a functional layer attached to the surface of the substrate for sensing the touch and connecting the outside, specifically comprising a sensing region formed in the middle of the surface of the substrate and having a shape formed at the edge of the substrate A lead area of multiple pins for connecting a Flexible Printed Circuit (FPC).
  • FPC Flexible Printed Circuit
  • the conductive material is removed or not printed elsewhere on the substrate, that is, there is a gap between the lead regions, and the segmentation It is not easy to cause a short circuit.
  • the laser process has the advantages of simple process and less chemical pollution, so the application is also increasingly widespread.
  • a conductive layer is first disposed on the substrate, and then the laser is irradiated around the desired pattern and the leads to form the sensing region and the lead region.
  • unnecessary portions of the conductive layer are not completely removed, and the lead region is formed by cutting at one end away from the sensing region. When cutting, it is necessary to cut exactly at the end of the pin. However, in actual production, it is difficult to be completely accurate.
  • the split position is located at the end of the pin away from the side of the sensing area, a short circuit occurs between the pins due to the unremoved conductive portion; if it is biased toward the side of the sensing area, the edge of the substrate may be deformed after being divided, especially It is a film substrate.
  • the pitch of adjacent pins is relatively small, adjacent pins are likely to be short-circuited due to deformation of the substrate. Therefore, any situation will reduce the yield.
  • Embodiments of the present invention provide a capacitive touch screen that can solve the above technical problems and a method of fabricating the same.
  • a capacitive touch screen includes a substrate and a conductive layer disposed on the substrate, the conductive layer including a sensing region in the middle and a lead region at the edge.
  • the lead region includes an inner side adjacent to the sensing region, an outer side away from the sensing region, and a first side and a second side connecting the opposite sides of the inner and outer sides, the lead region further including an outer side extending from the inner side to the outer side Pin.
  • the lead region further includes a non-conductive region extending from the first side to the second side between the inner side and the outer side, the non-conductive region intersecting each of the pins.
  • a method of fabricating a capacitive touch screen comprising: providing a substrate; disposing a conductive layer on the substrate; forming a sensing region in the middle of the conductive layer; and a lead region at an edge of the conductive layer; wherein the lead region includes An inner side of the sensing region, an outer side away from the sensing region, and a first side and a second side connecting the opposite inner and outer sides, the lead region further including a pin extending from the inner side to the outer side; A non-conductive region extending from the first side to the second side is formed between the inner side and the outer side of the region, the non-conductive region intersecting each of the leads; and the conductive layer and the substrate are divided along an outer side of the lead region.
  • FIG. 1 is a flow chart of a method of fabricating a capacitive touch screen according to a first embodiment of the present invention.
  • FIG. 2 is a side view showing the laser light irradiated on a conductive layer provided on a substrate according to the manufacturing method of FIG. 1.
  • FIG. 3 is a plan view of a capacitive touch screen fabricated in accordance with the method of FIG. 1.
  • FIG. 4 is a microscopic view showing a portion irradiated with and not irradiated in a partial region of the nanosilver film of FIG. 1.
  • FIG. 5 is an enlarged schematic view of a portion of a sensing region and a lead region on the capacitive touch screen of FIG. 3, in accordance with a first embodiment of the present invention.
  • FIG. 6 is an enlarged schematic view showing a portion of a sensing area and a lead area on a capacitive touch screen according to a second embodiment of the present invention.
  • FIG. 7 is an enlarged schematic view showing a portion of a sensing area and a lead area on a capacitive touch screen according to a third embodiment of the present invention.
  • the present invention provides a capacitive touch screen and a method of fabricating the same.
  • a method of manufacturing a capacitive touch screen will be described first.
  • the structure of the capacitive touch screen is also mentioned to better The manufacturing method is described. Therefore, the description of the structure of the capacitive touch screen is not separately described in the present specification.
  • the structure of the capacitive touch screen can be clearly understood by those skilled in the art according to the description of the manufacturing method.
  • FIG. 1 to FIG. 3 are flowcharts of a method for fabricating a capacitive touch screen according to an embodiment of the present invention, including the following steps:
  • the substrate 12 can be made of a transparent material, such as glass or polyethylene terephthalate (PET), to facilitate the production of touch-enabled display screen modules or other applications requiring transparency.
  • PET polyethylene terephthalate
  • the optional PET is used to fabricate the substrate 12, which has the advantages of good light transmission and flexibility, and is easy to manufacture.
  • the substrate 12 made of PET may have a thickness of about 0.01 to 0.5 millimeters (mm), preferably 0.015 to 0.2 mm, more preferably 0.1 mm, and the substrate in this thickness has a thickness. Good flexibility.
  • the thickness of the substrate 12 may be other options as well as other non-transparent materials, such as metals.
  • Step S20 A conductive layer 14 is provided on the substrate 12.
  • the conductive layer 14 may be a transparent conductive metal film having a nanometer dimension, including a film formed of a single metal, an alloy, a metal compound or any combination thereof in a nanometer dimension, such as a film including a nano wire, a film including a nano metal particle,
  • the film including the nano metal mesh may of course be a graphene film, a carbon nanotube film, an organic conductive polymer film, an indium tin oxide (ITO) film or any combination thereof.
  • the conductive layer 14 is a transparent conductive nano-silver film, which is a film comprising a polymer matrix having nano-silver filaments, and the nano-silver filaments are uniformly distributed in the film to make the film transparent. And conductive features.
  • the nanosilver film can be formed on the substrate 12 by coating, silk printing or spraying.
  • the substrate 12 and the nanosilver film 14 disposed on one surface thereof constitute the basic elements of the capacitive touch screen 10.
  • the capacitive touch screen 10 further includes a protective layer 16 on the side of the substrate 12 facing away from the conductive layer 14, and the protective layer 16 may be fixed to the substrate 12 by a scratch-resistant material such as a polycarbonate material or the like.
  • Step S30 forming a sensing region 20 located in the middle of the conductive layer 14 and a lead region 22 at the edge of the conductive layer 14.
  • the sensing region 20 and the lead region 22 are formed by a laser process. to make.
  • adjusting the parameters of the laser light 11 allows the laser light 11 to change the transparent conductive properties of the nanosilver film into a transparent and non-conductive manner without removing it.
  • the laser parameters include pulse width, pulse flux, pulse energy, spot size, pulse repetition rate, and the like.
  • the nanosilver in the irradiated portion will change from conductive to non-conductive, and at the same time, the transparency of the irradiated portion hardly changes, and The exposed portion of the nanosilver film is hardly peeled off.
  • conductive and non-conductive is relative to the field of printed electronics, touch sensing or optoelectronics.
  • a square resistance of about 30 to 250 ⁇ /sq can be considered to be electrically conductive
  • a square resistance of about 20 M ⁇ /sq can be considered to be non-conductive.
  • the conductive and non-conductive may be differently defined, and the above laser parameters are set according to specific application scenarios.
  • Fig. 4 it is shown in an enlarged manner that the portion of the conductive layer 14 is partially irradiated with the laser irradiation portion 24 and the portions thereof which are not irradiated with laser light.
  • the transparent characteristic and the conductive portion of the laser irradiated portion 24 are slightly changed after being placed 200 times larger. Therefore, it is impossible to distinguish the portion irradiated by the laser by the naked eye without any magnification tool. 24 and the portion not irradiated with the laser, which is verified in the actual product, that is, the laser irradiated portion 24 after being irradiated by the laser 11 is also transparent.
  • FIG. 5 is an enlarged schematic view of a portion of the sensing region 20 and the lead region 22 on the capacitive touch screen of FIG.
  • the sensing region 20 has a pattern 26 for sensing a touch, and a row line 28 and a column line 29 drawn from the pattern 26, wherein the row line 28 and the column line 29 are both disposed on one side of the sensing region 20.
  • the lead region 22 includes an inner side 32 proximate the sensing region 20, an outer side 34 remote from the sensing region 20, and an oppositely disposed first side 36 and second side 38 connecting the inner side 32 and the outer side 34.
  • the lead region 22 has a plurality of pins 39 formed by laser irradiation lines, and the leads 39 are connected to corresponding row lines 28 and column lines 29.
  • the pin 39 extends from the inner side 32 to the outer side 34, and in the present embodiment Extends in a straight line.
  • the laser illuminates the conductive layer from the outer side 34 to the inner side 32 from the lead region 22 and directly enters the sensing region 22 such that the lead 39 and its corresponding row line 28 or column line 29 are generated at a time.
  • the laser illuminates the conductive layer from the outer side 34 to the inner side 32 from the lead region 22 and directly enters the sensing region 22 such that the lead 39 and its corresponding row line 28 or column line 29 are generated at a time.
  • Step S40 forming a non-conductive region 40 extending from the first side 36 to the second side 38 between the inner side 32 and the outer side 34 of the lead region 22.
  • the non-conductive region 40 is a portion in which the nanosilver film is transparent and non-conductive after being irradiated by the laser beam 11 without being removed. A portion of the non-conductive region 40 is shown in FIG. 5.
  • the non-conductive region 40 is a non-conductive line extending from the first side 36 to the second side 38 and intersects the pins and is perpendicular to each other.
  • the non-conductive region 40 is relatively close to the outer side 34 compared to the inner side 32, and the distance between the non-conductive region 40 and the outer side 34 is greater than the segmentation error.
  • each pin 39 can have a longer length to be connected to the FPC.
  • the non-conductive region 40 is not limited to a wire, and may have a larger width, such as a rectangle; in addition, the non-conductive region 40 may also extend from the first side 36 to the second side 38 with each pin 39.
  • Step S50 dividing the conductive layer 14 and the substrate 12 along the outer side 34 of the lead region 22.
  • Step S50 dividing the conductive layer 14 and the substrate 12 along the outer side 34 of the lead region 22.
  • the present invention solves the problems described in the background art by the arrangement of the non-conductive regions 40, improving the yield yield.

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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)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Manufacturing Of Electric Cables (AREA)

Abstract

L'invention concerne un écran tactile capacitif (10), comprenant un matériau de base (12) et une couche conductrice (14) agencée sur ledit matériau de base (12), la couche conductrice (14) comprenant une zone de détection (20) positionnée au milieu et une zone de fil conducteur (22) positionnée au bord. La zone de fil conducteur (22) comprend un côté interne (32) le plus près de la zone de détection (20), un côté externe (34) le plus éloigné de la zone de détection (20), et un premier côté (36) et un second côté (38) reliant le côté interne (32) et le côté externe (34) et agencés de manière opposée l'un à l'autre, la zone de fil conducteur (22) comprenant également des broches (39) s'étendant à partir du côté interne (32) vers le côté externe (34). La zone de fil conducteur (22) comprend également une zone non conductrice (40) positionnée entre le côté interne (32) et le côté externe (34) et s'étendant à partir du premier côté (36) vers le second côté (38), la zone non conductrice (40) croisant chaque broche (39). Dans une procédure de segmentation, même si la position de segmentation change, en raison de l'agencement de la zone non conductrice (40), les broches (39) ne peuvent pas provoquer de court-circuit, résolvant les problèmes décrits dans l'état de la technique et améliorant le rendement de fabrication.
PCT/CN2015/072453 2015-02-06 2015-02-06 Écran tactile capacitif et son procédé de fabrication WO2016123810A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201580000929.7A CN105493014B (zh) 2015-02-06 2015-02-06 电容触摸屏及其制造方法
PCT/CN2015/072453 WO2016123810A1 (fr) 2015-02-06 2015-02-06 Écran tactile capacitif et son procédé de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/072453 WO2016123810A1 (fr) 2015-02-06 2015-02-06 Écran tactile capacitif et son procédé de fabrication

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WO2016123810A1 true WO2016123810A1 (fr) 2016-08-11

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090315835A1 (en) * 2008-06-24 2009-12-24 Freescale Semiconductor, Inc. Touch screen detection and diagnostics
CN102193671A (zh) * 2010-03-05 2011-09-21 三星移动显示器株式会社 集成有触摸屏面板的平板显示器
CN203191952U (zh) * 2013-02-22 2013-09-11 宸鸿光电科技股份有限公司 触摸板结构
CN203250291U (zh) * 2013-05-02 2013-10-23 深圳欧菲光科技股份有限公司 触摸屏
CN104090685A (zh) * 2014-07-31 2014-10-08 南昌欧菲光科技有限公司 透明导电膜及触摸屏
CN104102399A (zh) * 2013-04-13 2014-10-15 贵州达沃斯光电有限公司 电容式触摸屏及其制作方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101969186B1 (ko) * 2010-09-29 2019-04-15 다이니폰 인사츠 가부시키가이샤 터치스크린 패널 센서 필름
CN103838415A (zh) * 2012-11-24 2014-06-04 宝宸（厦门）光学科技有限公司 柔性触控面板结构及其制造方法
CN103677431A (zh) * 2013-12-31 2014-03-26 京东方科技集团股份有限公司 一种触摸屏及其制作方法、显示装置
CN203930754U (zh) * 2014-01-07 2014-11-05 深圳市鹏达源电子科技有限公司 一种无边框可弯曲电容屏装置
CN204044782U (zh) * 2014-08-01 2014-12-24 金龙机电（东莞）有限公司 触摸屏及触摸装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090315835A1 (en) * 2008-06-24 2009-12-24 Freescale Semiconductor, Inc. Touch screen detection and diagnostics
CN102193671A (zh) * 2010-03-05 2011-09-21 三星移动显示器株式会社 集成有触摸屏面板的平板显示器
CN203191952U (zh) * 2013-02-22 2013-09-11 宸鸿光电科技股份有限公司 触摸板结构
CN104102399A (zh) * 2013-04-13 2014-10-15 贵州达沃斯光电有限公司 电容式触摸屏及其制作方法
CN203250291U (zh) * 2013-05-02 2013-10-23 深圳欧菲光科技股份有限公司 触摸屏
CN104090685A (zh) * 2014-07-31 2014-10-08 南昌欧菲光科技有限公司 透明导电膜及触摸屏

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CN105493014A (zh) 2016-04-13
CN105493014B (zh) 2018-06-08

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