WO2015141473A1 - Capteur capacitif - Google Patents

Capteur capacitif Download PDF

Info

Publication number
WO2015141473A1
WO2015141473A1 PCT/JP2015/056393 JP2015056393W WO2015141473A1 WO 2015141473 A1 WO2015141473 A1 WO 2015141473A1 JP 2015056393 W JP2015056393 W JP 2015056393W WO 2015141473 A1 WO2015141473 A1 WO 2015141473A1
Authority
WO
WIPO (PCT)
Prior art keywords
pattern
transparent conductive
lead
conductive film
capacitive sensor
Prior art date
Application number
PCT/JP2015/056393
Other languages
English (en)
Japanese (ja)
Inventor
尾藤　三津雄
知行 山井
恭志 北村
Original Assignee
アルプス電気株式会社
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 アルプス電気株式会社 filed Critical アルプス電気株式会社
Priority to JP2016508651A priority Critical patent/JP6096375B2/ja
Publication of WO2015141473A1 publication Critical patent/WO2015141473A1/fr

Links

Images

Classifications

    • 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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • 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

Definitions

  • the present invention relates to a capacitive sensor in which a pattern made of a transparent conductive film containing metal nanowires is formed.
  • Patent Document 1 discloses a touch switch that is a capacitive sensor including a transparent conductive film having a single layer structure.
  • a touch electrode portion and a wiring portion extending from the touch electrode portion are formed of a mesh-like metal wire.
  • the configuration of this touch switch can be realized with a small touch panel, but it is necessary to arrange a large number of thin and long wires as the panel size increases.
  • the wiring portion is formed of a metal wire, when the wiring portion is thin and long, the electrical resistance of the wiring portion is increased.
  • a plurality of transparent conductive structures are formed on the surface of a substrate, and the conductive structures are composed of carbon nanotubes.
  • the conductive wire extending from the conductive structure is made of ITO. However, if the conductive wire is made of ITO or the like, the electrical resistance becomes high, and the electrical resistance of the conductive wire lowers the detection sensitivity.
  • metal nanowires are used for a single-layer transparent conductive film
  • the metal nanowires themselves have a relatively sparse mesh structure. For this reason, when the wiring is elongated, there is a possibility that a portion to be disconnected is generated, and it is difficult to form a thin and long wiring portion.
  • an object of the present invention is to provide a capacitance type sensor that can keep the electrical resistance low even when the panel is enlarged, and can reduce the risk of disconnection when the wiring is elongated. To do.
  • the capacitive sensor of the present invention is a capacitive sensor formed by forming a pattern made of a transparent conductive film on a base material, and the pattern has a plurality of detection electrodes spaced apart from each other. And a plurality of lead wires extending in parallel in the same direction from the plurality of detection electrodes, the transparent conductive film includes metal nanowires, and the transparent conductive film Has an anisotropy in which the resistance value in the direction in which the lead wiring extends is 1 / 1.4 or less than the resistance value in the direction orthogonal to the direction in which the lead wiring extends. It is said.
  • the electrostatic capacity sensor of the present invention can suppress electrical resistance even when a touch panel to which the electrostatic capacity sensor is applied is enlarged, and can obtain good detection sensitivity in a wide operation region. Further, by aligning the orientation direction of the metal nanowires in the transparent conductive film, it becomes easy to connect a plurality of metal nanowires in the orientation direction for a long time.
  • the width of the lead-out wiring is 100 ⁇ m or less.
  • the resistance value in the direction in which the lead wiring extends is 1/3 or more and 1 / 1.4 or less than the resistance value in the direction orthogonal to the direction in which the lead wiring extends.
  • the width of the lead wiring is 60 ⁇ m or more and 100 ⁇ m or less.
  • the metal nanowire is preferably a silver nanowire.
  • the length of the silver nanowire is preferably 1 ⁇ m or more and 1000 ⁇ m or less.
  • the electrical resistance can be kept low even when the panel is enlarged, and furthermore, the wiring is elongated by providing anisotropy to the resistance value of the transparent conductive film. The possibility of disconnection can also be reduced.
  • FIG. 1 is a plan view showing a conductive pattern of the capacitive sensor according to the present embodiment.
  • the capacitive sensor of this embodiment is formed by forming a pattern 20 made of a transparent conductive film having a single layer structure on a film substrate 10, and the pattern 20 includes a detection pattern 21 and a lead-out wiring 22.
  • the film base 10 is, for example, a transparent inorganic substrate or plastic substrate.
  • the form of the substrate is, for example, a film or sheet having transparency. However, a transparent plate material thicker than the film can also be used.
  • the material for the inorganic substrate include quartz, sapphire, and glass.
  • the plastic substrate material include triacetyl cellulose (TAC), polyester (TPEE), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide (PI), polyamide (PA), aramid, and polyethylene (PE).
  • Polyacrylate Polyether sulfone, polysulfone, polypropylene (PP), diacetyl cellulose, polyvinyl chloride, acrylic resin (PMMA), polycarbonate (PC), epoxy resin, urea resin, urethane resin, melamine resin, cycloolefin polymer ( COP).
  • the detection pattern 21 has a configuration in which a plurality of rectangular detection electrodes 21a are arranged at regular intervals in each of the X1-X2 direction and the Y1-Y2 direction.
  • FIG. 1 is a schematic diagram for simplification, and detection electrodes 21a having the same area are arranged.
  • the plurality of lead-out wirings 22 extend in parallel to each other along the same direction (Y1-Y2 direction) from the Y2 side ends of the plurality of detection electrodes 21a. More specifically, the plurality of lead wires 22 extend from the Y2 side end of the second vertical side 21c of the detection electrode 21a to the Y2 side, respectively.
  • a capacitance is formed between a plurality of adjacent detection electrodes 21a.
  • a capacitance is formed between the finger and the detection electrode 21a close to the finger, so that the current value detected from the detection electrode 21a is measured. It is possible to detect which electrode of the plurality of detection electrodes 21a is closest to the finger.
  • the transparent conductive film forming the pattern 20 includes conductive metal nanowires.
  • This metal nanowire is comprised by 1 or more types selected from Ag, Au, Ni, Cu, Pd, Pt, Rh, Ir, Ru, Os, Fe, Co, Sn, for example.
  • the average minor axis diameter of the metal nanowire is preferably larger than 1 nm and not larger than 500 nm.
  • the average long axis length of the metal nanowire is preferably greater than 1 ⁇ m and 1000 ⁇ m or less.
  • the metal nanowires may be surface-treated with an amino group-containing compound such as PVP or polyethyleneimine. It is preferable to make the addition amount so that the conductivity is not deteriorated when the coating is formed.
  • sulfo group including sulfonate
  • sulfonyl group sulfonamide group
  • carboxylic acid group including carboxylate
  • amide group phosphate group (including phosphate and phosphate ester)
  • phosphino group silanol group
  • a compound having a functional group such as an epoxy group, an isocyanate group, a cyano group, a vinyl group, a thiol group, or a carbinol group, which can be adsorbed on a metal, may be used as a dispersant.
  • Examples of the dispersant for the nanowire ink include water, alcohol (for example, methanol, ethanol, n-propanol, i-propanol, n-butanol, i-butanol, sec-butanol, tert-butanol, etc.), anone (for example, At least one selected from cyclohexanone, cyclopentanone), amide (DMF), and sulfide (DMSO) is used.
  • alcohol for example, methanol, ethanol, n-propanol, i-propanol, n-butanol, i-butanol, sec-butanol, tert-butanol, etc.
  • anone for example, At least one selected from cyclohexanone, cyclopentanone
  • amide DMF
  • DMSO sulfide
  • a high boiling point solvent can be further added to control the evaporation rate of the solvent.
  • a high boiling point solvent can be further added to control the evaporation rate of the solvent.
  • solvents may be
  • the binder material applicable to the nanowire ink can be widely selected from known transparent natural polymer resins or synthetic polymer resins.
  • transparent thermoplastic resins for example, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polymethyl methacrylate, nitrocellulose, chlorinated polyethylene, chlorinated polypropylene, vinylidene fluoride, ethyl cellulose, hydroxypropyl methyl cellulose
  • a transparent curable resin for example, a melamine acrylate, urethane acrylate, isocyanate, epoxy resin, polyimide resin, silicon resin such as acrylic-modified silicate
  • the additive include a surfactant, a viscosity modifier, a dispersant, a curing accelerating catalyst, a plasticizer, a stabilizer such as an antioxidant and an antisulfurizing agent, and the like.
  • the metal nanowires included in the pattern 20 are oriented in the Y direction, and the electrical resistance along the Y1-Y2 direction (Y direction) is smaller than the electrical resistance along the X1-X2 direction (X direction), Resistance anisotropy occurs.
  • a pattern 20 can be formed, for example, by a method such as offset printing of the nanowire ink by providing a speed difference between the film substrate 10 and the blanket in the Y direction.
  • FIG. 2 is a photograph showing the orientation state of the metal nanowires formed in the transparent conductive film as described above.
  • the vertical direction is the printing direction MD (Machine Direction), which is the moving direction of the film substrate 10 during transfer from the blanket to the film substrate 10, and the horizontal direction is a direction TD (vertical to the printing direction MD). (Transverse Direction). Since the nanowire ink is transferred from the blanket onto the film substrate 10 under the above-described conditions, it can be seen that the metal nanowires are oriented so as to extend along the printing direction MD as shown in FIG.
  • the resistance value in the Y1-Y2 direction in which the lead wiring 22 extends is relative to the resistance value in the X1-X2 direction orthogonal to the Y1-Y2 direction in which the lead wiring 22 extends. It preferably has an anisotropy of 1 / 1.4 or less. Thereby, even if the panel is enlarged, the electrical resistance can be kept low, and the detection characteristics can be maintained. Further, by orienting the metal nanowires in the nanowire ink 90 in the Y1-Y2 direction, a plurality of metal nanowires can be easily connected in the Y1-Y2 direction, so that disconnection can be prevented.
  • the width of the lead-out wiring 22 can be reduced to, for example, 100 ⁇ m or less, and at the same time, it is possible to realize a wiring that is difficult to insulate and secures conduction. Furthermore, since the number of metal nanowires oriented in the Y1-Y2 direction is increased, resistance against ESD (electrostatic discharge) can be increased.
  • the disconnection rate was determined by measuring the ratio of a large number of patterns having a length of 80 mm in which conduction was not obtained between both ends of each pattern.
  • the line width (the line width of the lead-out wiring 22) is 60 ⁇ m or more, the disconnection rate can be kept low, and the resistance ratio is 80 ⁇ m or more. It turns out that it can conduct without disconnection if there is.
  • the pattern 20 is formed by transferring the pattern formed on the blanket onto the film substrate 10, but instead of this, patterning by etching, cutting by laser etching, by fluorination
  • the pattern 20 can also be formed by non-conductive treatment or the like.
  • a solid nanowire ink layer formed on the film substrate 10 is used, and regions other than the pattern 20 are dissolved with an etching solution, or the pattern 20 is formed by chemical reaction or physical collision by etching.
  • the pattern 20 is formed by removing the area other than the above or by performing non-conductive treatment on the area other than the pattern 20 by fluorination.
  • the moving speed of the film substrate 10 is made faster than the rotation speed of the ink supply roller corresponding to the blanket, as in the above-described embodiment.
  • the metal nanowire in nanowire ink is orientated to a fixed direction.
  • the capacitive sensor according to the present invention is useful for a large touch panel having a transparent conductive film having a single layer structure, and can form a transparent pattern that is difficult to be visually recognized by the user.

Abstract

L'invention concerne un capteur capacitif qui permet de réduire au minimum la résistance électrique même lorsque la taille d'un panneau est accrue et de réduire le risque de déconnexion lorsque le câblage devient long et mince. Le capteur capacitif est obtenu par formation d'un motif qui comprend un film conducteur transparent sur un substrat. Le motif comprend : un motif de détection dans lequel une pluralité d'électrodes de détection sont agencées avec des espaces entre elles ; et une pluralité de lignes de câblage de sortie qui s'étendent à partir de chacune de la pluralité d'électrodes de détection dans la même direction et qui sont parallèles les unes aux autres. Le film conducteur transparent comprend un nanofil métallique. Le film conducteur transparent est anisotrope de telle sorte que la valeur de résistance dans la direction d'extension des lignes de câblage de sortie par rapport à la valeur de résistance dans la direction qui est orthogonale à la direction d'extension des lignes de câblage de sortie est de 1/1,4 ou moins.
PCT/JP2015/056393 2014-03-20 2015-03-04 Capteur capacitif WO2015141473A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016508651A JP6096375B2 (ja) 2014-03-20 2015-03-04 静電容量式センサ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-058991 2014-03-20
JP2014058991 2014-03-20

Publications (1)

Publication Number Publication Date
WO2015141473A1 true WO2015141473A1 (fr) 2015-09-24

Family

ID=54144447

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/056393 WO2015141473A1 (fr) 2014-03-20 2015-03-04 Capteur capacitif

Country Status (2)

Country Link
JP (1) JP6096375B2 (fr)
WO (1) WO2015141473A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018014382A1 (fr) * 2016-07-19 2018-01-25 武汉华星光电技术有限公司 Substrat de matrice et affichage à commande tactile
WO2018062517A1 (fr) * 2016-09-30 2018-04-05 大日本印刷株式会社 Film électro-conducteur, panneau tactile et dispositif d'affichage d'image
JP2021060521A (ja) * 2019-10-08 2021-04-15 大日本印刷株式会社 調光フィルム及び調光装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011514597A (ja) * 2008-02-28 2011-05-06 スリーエム イノベイティブ プロパティズ カンパニー 変化するシート抵抗を有するタッチスクリーンセンサ
JP2014026584A (ja) * 2012-07-30 2014-02-06 Shin Etsu Polymer Co Ltd 透明配線シートおよびその製造方法ならびにタッチパネル用入力部材

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101937279B (zh) * 2009-06-30 2013-11-13 群康科技(深圳)有限公司 触摸屏及其驱动方法
JP2011039758A (ja) * 2009-08-11 2011-02-24 Seiko Epson Corp タッチパネル装置、表示装置および電子機器
JP5374457B2 (ja) * 2010-07-30 2013-12-25 グンゼ株式会社 面状体及びタッチパネル
JP5538567B2 (ja) * 2010-12-09 2014-07-02 シャープ株式会社 タッチパネル及びそれを備えた表示装置並びにタッチパネルの製造方法
JP2012203628A (ja) * 2011-03-25 2012-10-22 Hosiden Corp タッチパネル及びこれを備えた電子機器
JP2013235471A (ja) * 2012-05-10 2013-11-21 Panasonic Corp タッチパネル
JP5840096B2 (ja) * 2012-05-28 2016-01-06 富士フイルム株式会社 導電フィルムおよびタッチパネル

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011514597A (ja) * 2008-02-28 2011-05-06 スリーエム イノベイティブ プロパティズ カンパニー 変化するシート抵抗を有するタッチスクリーンセンサ
JP2014026584A (ja) * 2012-07-30 2014-02-06 Shin Etsu Polymer Co Ltd 透明配線シートおよびその製造方法ならびにタッチパネル用入力部材

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018014382A1 (fr) * 2016-07-19 2018-01-25 武汉华星光电技术有限公司 Substrat de matrice et affichage à commande tactile
WO2018062517A1 (fr) * 2016-09-30 2018-04-05 大日本印刷株式会社 Film électro-conducteur, panneau tactile et dispositif d'affichage d'image
CN110088848A (zh) * 2016-09-30 2019-08-02 大日本印刷株式会社 导电性膜、触控面板和图像显示装置
US10831327B2 (en) 2016-09-30 2020-11-10 Dai Nippon Printing Co., Ltd. Electroconductive film, touch panel, and image display device
CN110088848B (zh) * 2016-09-30 2021-03-12 大日本印刷株式会社 导电性膜、触控面板和图像显示装置
US11298925B2 (en) 2016-09-30 2022-04-12 Dai Nippon Printing Co., Ltd. Electroconductive film, touch panel, and image display device
US11648759B2 (en) 2016-09-30 2023-05-16 Dai Nippon Printing Co., Ltd. Electroconductive film, touch panel, and image display device
JP2021060521A (ja) * 2019-10-08 2021-04-15 大日本印刷株式会社 調光フィルム及び調光装置
JP7279608B2 (ja) 2019-10-08 2023-05-23 大日本印刷株式会社 調光フィルム及び調光装置

Also Published As

Publication number Publication date
JPWO2015141473A1 (ja) 2017-04-06
JP6096375B2 (ja) 2017-03-15

Similar Documents

Publication Publication Date Title
US8969731B2 (en) Patterned transparent conductors and related manufacturing methods
JP6630393B2 (ja) 静電容量式センサ
KR20140044895A (ko) 투명 전도성 다층 전극 및 관련된 제조 방법
JP6605082B2 (ja) 静電容量式センサ
JP6096375B2 (ja) 静電容量式センサ
US20180307341A1 (en) Touch devices including nanoscale conductive films
US9921697B2 (en) Touch sensor device and manufacturing method thereof
JP6717316B2 (ja) 機能性細線パターンの形成方法及び機能性細線パターン
JP5944588B2 (ja) 透明導電膜の形成方法
US10474309B2 (en) Conductive element, input device, and electronic apparatus
US20180162323A1 (en) Fogging removal system and fogging removal method using the same
JP2017111478A (ja) 静電容量式タッチセンサ用シート及びその製造方法
CN204423340U (zh) 触控模块

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15765865

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2016508651

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15765865

Country of ref document: EP

Kind code of ref document: A1