WO2011158299A1 - 入力装置 - Google Patents
入力装置 Download PDFInfo
- Publication number
- WO2011158299A1 WO2011158299A1 PCT/JP2010/004058 JP2010004058W WO2011158299A1 WO 2011158299 A1 WO2011158299 A1 WO 2011158299A1 JP 2010004058 W JP2010004058 W JP 2010004058W WO 2011158299 A1 WO2011158299 A1 WO 2011158299A1
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- WIPO (PCT)
- Prior art keywords
- input device
- transparent
- substrate
- insulating
- transparent conductive
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
- G06F3/0447—Position sensing using the local deformation of sensor cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
Definitions
- the present invention relates to an input device provided on the front surface of an image display device such as a touch panel and an electromagnetic wave shield of a plasma display.
- an input device having a conductive substrate in which a transparent conductive layer (transparent conductive film) is formed on the surface of a transparent insulating substrate is installed as an electrode sheet on the front surface of an image display device such as a liquid crystal display.
- Materials constituting the transparent conductive layer of the conductive substrate of the input device include ⁇ -conjugated conductive polymers (organic conductors) represented by tin-doped indium oxide (ITO) and polyethylenedioxythiophene-polystyrene sulfonic acid. Widely known.
- a circuit pattern or an antenna array pattern may be formed.
- a pattern forming method for example, in Patent Document 1, a transparent conductive layer is formed on the entire surface of a transparent substrate by coating, and then a pulse width of about 100 nsec using a CO 2 laser or a Q switch is used. A method is disclosed in which a transparent conductive layer to be insulated is irradiated by YAG laser to be removed by ablation.
- Patent Documents 2 and 3 disclose a method of forming a conductive portion in a predetermined pattern on the surface of a transparent substrate by printing such as a screen printing method or a gravure printing method.
- Patent Document 4 discloses a method of forming a transparent conductive layer on the entire surface of a transparent substrate by coating, and then removing the portion of the transparent conductive layer to be insulated by plasma etching.
- Patent Document 5 discloses a technique for forming a conductive pattern by irradiating a transparent conductive film obtained by dispersing and curing metal nanowires (metal ultrafine fibers) in a binder (resin) and curing the transparent conductive film. . Note that the metal nanowires protruding from the transparent conductive film to the outside are removed by a laser.
- Patent Document 6 an ultraviolet laser is used for an ITO vapor deposition substrate for a touch panel, the beam diameter and the focal length of the lens are controlled, and the processing width in the light condensing area is controlled, thereby performing fine ablation of about 10 ⁇ m.
- a technique for forming a fine pattern is disclosed.
- the organic conductor is colored green to blue and ITO is colored pale yellow.
- the conductive portions are colored inherent to the conductor forming each conductive film, and the insulating portions only of the insulating substrate are colorless. Therefore, when the obtained conductive substrate is used as an input device and installed on the front surface of the image display device, the conductive portion must be conductive unless the width of the insulating portion (width dimension perpendicular to the extending direction of the insulating portion) is made small. There was a problem that the pattern was visually recognized. On the other hand, when the width of the insulating portion is formed to be small, there is a possibility that the insulating property cannot be secured.
- Patent Document 5 has an advantage that the conductive pattern of the input device is hardly visible.
- the metal nanowire remains not only in the conductive part but also in the insulating part inside the transparent conductive film, it has been difficult to reliably perform the insulation. That is, in order to insulate the insulating part reliably, it is necessary to control the thickness of the transparent conductive film.
- Patent Document 6 it is necessary to use an ultraviolet laser using high-order harmonics for processing, and in order to adjust the width of the ablation region, the laser beam diameter and zoom lens focal length are adjusted. However, there is a problem that it is difficult to cope with commercially available laser processing machines.
- the present invention has been made in view of such circumstances, and even if the width of the insulating portion is increased, the conductive pattern is hardly visible, and the insulating portion is reliably insulated to achieve stable electrical performance.
- An object is to provide an input device that can be obtained.
- the input device of the present invention includes an insulating substrate, and a conductive substrate having a transparent conductive film provided on the insulating substrate and provided with a net member made of a conductive metal in a transparent base having insulation properties.
- a pair of input members provided so as to be laminated in the thickness direction, and a detection unit that is electrically connected to the transparent conductive film and detects an input signal, and the transparent conductive film includes the transparent substrate.
- a conductive portion in which the mesh member is arranged in the body and an insulating portion in which at least a part of the mesh member in the transparent substrate is removed are provided.
- a gap formed by removing the mesh member may be disposed in the insulating portion.
- the mesh member may be made of metal fine fibers dispersed in the transparent substrate and electrically connected to each other.
- the metal microfiber may be mainly composed of silver.
- the gap of the insulating part may be formed by irradiating the mesh member with a pulsed laser.
- the pulsed laser may be an ultrashort pulse laser having a pulse width of less than 1 psec.
- the pulsed laser may be a YAG laser or a YVO 4 laser.
- the insulating substrate may be transparent.
- the input member is arranged such that the transparent conductive film of the pair of conductive substrates is directed toward one side along the thickness direction, and the detection means includes a static It may be a capacitance type.
- the input member is disposed to face the transparent conductive film of the pair of conductive substrates in a state of being close to each other with an interval therebetween. It is good also as being able to contact one part in direct current.
- the input device of the present invention even if the width of the insulating portion is increased, the conductive pattern is hardly visible, and the insulating portion can be reliably insulated to obtain stable electrical performance.
- FIG. 13 is an enlarged side cross-sectional view taken along line AA in FIG. 12.
- FIG. 13 is an enlarged side cross-sectional view taken along the line BB in FIG. 12.
- the input device according to the present invention can be applied to a product in which a wiring pattern is formed in a transparent portion, such as a transparent input device such as a transparent antenna, a transparent electromagnetic wave shield, a capacitance type or a membrane type transparent touch panel. it can.
- the input device of the present invention is an electrode necessary for a capacitance sensor or the like provided on the surface of a three-dimensional molded product or a three-dimensional decorative molded product, such as a capacitive input device attached to a steering wheel of an automobile. Can be used for the purpose of forming.
- “transparent” refers to a material having a light transmittance of 50% or more.
- FIG. 1 and 10 show an input member 1 for a membrane touch panel (input device) according to a first embodiment of the present invention.
- this membrane type touch panel is provided on insulating substrates 11 and 21 and insulating substrates 11 and 21, and a net-like member 3 made of a conductive metal in a transparent base 2 having an insulating property.
- Conductive substrates 10 and 20 having transparent conductive films 12 and 22 provided with a pair of input members 1 so as to be laminated in the thickness direction and the transparent conductive films 12 and 22 are electrically connected to the input Detecting means for detecting a signal.
- the input member 1 is installed on the input side of an image display device (not shown) such as an LCD.
- an image display device not shown
- the input member 1 includes, for example, a conductive substrate 10 in which electrodes 100 (corresponding to a conductive portion C described later of the transparent conductive film 12) along the row (X) direction are arranged in parallel, and the conductive substrate 10.
- the conductive substrate 20 is arranged on the image display device side so as to face the electrode, and electrodes (corresponding to the conductive portion C of the transparent conductive film 22) along the column (Y) direction orthogonal to the row (X) direction are arranged in parallel. And a transparent dot spacer 30 provided between them.
- the input member 1 is configured such that the electrode 100 of the conductive substrate 10 and the electrode of the conductive substrate 20 are brought into direct contact with each other and input by an input operation.
- the conductive substrate 10 includes a transparent insulating substrate 11 and a transparent conductive film 12 provided on a surface of the insulating substrate 11 facing at least the image display device side.
- the conductive substrate 20 includes a transparent insulating substrate 21 and a transparent conductive film 22 provided on the surface of the insulating substrate 21 facing at least the input side.
- the insulating substrates 11 and 21 those having insulating properties and capable of forming the transparent conductive films 12 and 22 on the surface and being less likely to change in appearance under predetermined irradiation conditions with respect to laser processing to be described later are used. Is preferred. Specific examples include insulating materials such as glass, polycarbonate, polyester typified by polyethylene terephthalate (PET), and acrylonitrile / butadiene / styrene copolymer resin (ABS resin). As the shape of the insulating substrates 11 and 21, a plate shape, a flexible film shape, a three-dimensional (three-dimensional) molded product, or the like can be used.
- PET polyethylene terephthalate
- ABS resin acrylonitrile / butadiene / styrene copolymer resin
- the input member 1 When the input member 1 is used for a transparent touch panel, a glass plate, a PET film or the like is used for the insulating substrates 11 and 21. Further, when the input member 1 is used as an electrode necessary for a capacitance sensor or the like such as a capacitance input device attached to a steering wheel of an automobile, the insulating substrates 11 and 21 are molded products made of ABS resin or the like. Alternatively, a decorative molded product provided with a decorative layer by laminating or transferring the film is used.
- the input person side insulating substrate 11 may be an input person. It is preferable to use a substrate that is flexible with respect to an external force from the side (for example, a transparent resin film).
- a predetermined one that easily supports the conductive substrate 10 via the dot spacer 30 is used. It is preferable to use one having the above hardness (for example, equivalent to or higher than that of the insulating substrate 11).
- the transparent conductive films 12 and 22 of the pair of conductive substrates 10 and 20 are arranged to face each other with a space therebetween by the dot spacers 20 while being close to each other.
- the conductive substrate 10 is pressed from the input side toward the image display device side, the insulating substrate 11 and the transparent conductive film 12 of the conductive substrate 10 are bent and the transparent conductive film 12 is conductive.
- the transparent conductive film 22 of the substrate 20 can be contacted. An electrical signal is generated by this contact. That is, the input member 1 is configured such that a part of the transparent conductive films 12 and 22 can be in direct contact with each other by an input operation of the input person.
- the transparent conductive films 12 and 22 are provided with a mesh member 3 made of a conductive metal in a transparent base 2 having an insulating property.
- the transparent substrate 2 can be filled (impregnated) between the strands (fibers) of the mesh member 3 described later in a liquid state, for example, a curable resin having a property of being cured by heat, ultraviolet rays, electron beams, radiation, or the like. Consists of.
- the mesh member 3 is composed of a plurality of metal microfibers 4 dispersed in the transparent substrate 2 and electrically connected to each other.
- the metal microfibers 4 extend irregularly in different directions along the surface direction of the surfaces of the insulating substrates 11 and 21 (surfaces on which the transparent conductive films 12 and 22 are formed). The at least a part of them are arranged densely so as to overlap (contact with) each other, and are electrically connected (connected) to each other by such an arrangement.
- the mesh member 3 forms a conductive two-dimensional network on the surfaces of the insulating substrates 11 and 21, and the region where the mesh member 3 is disposed in the transparent substrate 2 of the transparent conductive films 12 and 22 is , Conductive portion C. Further, the metal microfiber 4 of the mesh member 3 has a portion embedded in the transparent substrate 2 and a portion protruding from the surface of the transparent substrate 2.
- metal microfibers 4 examples include metal nanowires and metal nanotubes made of copper, platinum, gold, silver, nickel, and the like.
- metal nanowires silver nanowires mainly composed of silver are used as the metal microfibers 4.
- the metal ultrafine fiber 4 is formed with a diameter of about 0.3 to 100 nm and a length of about 1 ⁇ m to 100 ⁇ m, for example.
- a fibrous member such as silicon nanowire, silicon nanotube, metal oxide nanotube, carbon nanotube, carbon nanofiber, and graphite fibril other than the metal ultrafine fiber 4 described above is used. These may be configured to be dispersed and connected.
- the insulating part I is formed by removing at least a part of the mesh member 3. That is, as shown in FIG. 3, a plurality of voids 5 are formed in the transparent substrate 2 by removing the metal ultrafine fibers 4 of the mesh member 3, and the regions are arranged so that these voids 5 are densely packed. Is the insulating part I. More specifically, these voids 5 are formed by irradiating a pulsed laser to a region of the mesh member 3 where the metal microfibers 4 are disposed, and evaporating and removing the metal microfibers 4.
- a so-called femtosecond laser which is an ultrashort pulse laser having a pulse width of less than 1 psec can be used.
- a YAG laser or YVO 4 laser other than the femtosecond laser may be used as the pulsed laser.
- a widely used processing machine having a pulse width of about 5 to 300 nsec can be used.
- These voids 5 are elongated holes (oblong holes) or holes (round holes) that irregularly extend or are scattered in different directions along the surface direction of the surface (exposed surface) of the transparent substrate 2. Each of which has a portion opening on the surface. Specifically, the gap 5 is disposed so as to correspond to the position where the evaporated and removed metal microfibers 4 are disposed, and has a diameter (inner diameter) substantially equal to the diameter of the metal microfibers 4. In addition, the length is less than the length of the metal microfiber 4.
- one metal microfiber 4 is completely evaporated / removed, or at least a part thereof is evaporated / removed so that the metal microfiber 4 is divided in the extending direction,
- a plurality of gaps 5 are formed at intervals. That is, a plurality of gaps 5 that are separated from each other are formed so as to extend or be scattered so as to form a linear shape as a whole, corresponding to the corresponding positions of the metal microfibers 4. Incidentally, only one gap 5 may be formed so as to form a linear shape corresponding to the corresponding position of one metal fine fiber 4.
- the metal microfibers 4 that are conductors are removed, and the conductive two-dimensional network is removed (disappeared).
- the metal microfibers 4 are removed from the transparent substrate 2, the conductive part C and the insulating part I in the transparent base 2 have different chemical compositions.
- the transparent conductive layer (transparent conductive film before forming the conductive pattern) a formed on one surface of the insulating substrate 11 (21) has an electrode.
- a method of irradiating a short pulse laser beam L in a predetermined pattern is used.
- laminate A a laminate having an insulating substrate 11 (21) before laser processing and a transparent conductive layer a formed on one surface of the insulating substrate 11 (21) is referred to as a conductive substrate. It is called laminate A.
- the manufacturing apparatus 40 used in the method for manufacturing a conductive pattern forming substrate of this embodiment will be described.
- the manufacturing apparatus 40 includes a laser light generating unit 41 that generates laser light L, a condensing lens 42 such as a convex lens that is a condensing unit that condenses the laser light L, and a conductive substrate. And a stage 43 on which the laminated body A is placed.
- the laser light generating means 41 in the manufacturing apparatus 40 one that generates laser light (visible light or infrared laser light) having a wavelength of less than 2 ⁇ m and a pulse width of less than 200 ns is used.
- the pulse width of the laser light L is preferably 1 to 100 nsec.
- the condenser lens 42 is preferably arranged so that the focal point F of the laser light L is located between the transparent conductive layer a and the condenser lens 42. Thereby, the spot diameter of the laser beam L hitting the insulating substrate 11 (21) and the stage 43 becomes larger than the spot diameter of the laser beam L hitting the transparent conductive layer a, and the laser beam L hitting the insulating substrate 11 (21) and the stage 43 Since the energy density is reduced, damage to the insulating substrate 11 (21) and the stage 43 can be prevented.
- the condenser lens 42 a lens having a low numerical aperture (NA ⁇ 0.1) is preferable. That is, by setting the numerical aperture of the condensing lens 42 to NA ⁇ 0.1, it becomes easy to set the irradiation condition of the laser light L.
- the focal point F of the laser light L is the transparent conductive layer a and the condensing lens 42. Energy loss due to air plasma at the focal point F and diffusion of the laser beam L can be prevented.
- the transparent conductive layer a is formed by filling (impregnating) the transparent base 2 made of resin between the fibers (element wires) of the net-like member 3 made of, for example, the metal ultrafine fibers 4, and made of a transparent resin film.
- the metal microfibers 4 embedded in the transparent substrate 2 of the transparent conductive layer a are reliably removed by being ejected from the surface of the transparent substrate 2 according to the above-described setting. be able to. Accordingly, the gap 5 is reliably formed corresponding to the desired shape of the insulating portion I, and the insulating process can be realized reliably and easily.
- the insulating substrate 11 (21) is not affected while the transparent conductive layer a is processed.
- Such control of the irradiation energy density is easier than in the conventional method.
- the stage 43 can be moved two-dimensionally in the horizontal direction.
- the stage 43 is preferably composed of a member having at least a transparent upper surface or a member having light absorption.
- the stage 43 is preferably made of a nylon-based or fluorine-based resin material or a silicone rubber-based polymer material.
- substrate of the input member 1 of the input device using the manufacturing apparatus 40 mentioned above is demonstrated.
- the laminate A for conductive substrate is placed on the upper surface of the stage 43 so that the transparent conductive layer a is disposed above the insulating substrate 11 (21).
- the laser light L is emitted from the laser light generating means 41, and the laser light L is collected by the condenser lens 42. A portion of the condensed laser light L where the spot diameter has passed past the focal point F is irradiated onto the transparent conductive layer a. At that time, the stage 43 is moved so that the irradiation of the laser beam L has a predetermined pattern.
- the energy density of the laser beam L and the irradiation energy per unit area irradiated to the transparent conductive layer a differ depending on the pulse width of the laser.
- the energy density is 1 ⁇ 10 16 to 7 ⁇ 10 17 W / m 2
- the irradiation energy per unit area is 1 ⁇ 10 5 to 1 ⁇ 10 6 J / m 2 is preferred.
- the energy density is 1 ⁇ 10 17 to 7 ⁇ 10 18 W / m 2
- the irradiation energy per unit area is 1 ⁇ 10 6 to 1 ⁇ 10. 7 J / m 2 is preferred. That is, when the energy density / irradiation energy is set to a value smaller than the above numerical range, the insulation of the insulating portion I may be insufficient. Further, when the value is set to be larger than the above numerical range, the processing trace becomes conspicuous, which is inappropriate for applications such as a transparent touch panel and a transparent electromagnetic wave shield.
- the distance D is set within a range of 0.2% to 3% of the focal length FL.
- the distance D is set within a range of 0.5% to 2% of the focal length FL. More preferably, the distance D is set within a range of 0.7% to 1.5% of the focal length FL.
- adjacent spot positions overlap each other by irradiating pulsed laser light L intermittently multiple times while moving the spot position on the transparent conductive layer a. It is preferable to form a portion to be used. Specifically, it is preferable to intermittently irradiate 3 to 500 times, and more preferably 20 to 200 times. If the irradiation is performed three times or more, the insulation can be more reliably performed. If the irradiation is performed 500 times or less, the transparent substrate 2 irradiated with the laser beam L can be prevented from being removed by dissolution or evaporation.
- the transparent conductive layer a is patterned to form the transparent conductive film 12 (22) having a conductive pattern composed of the conductive portion C and the insulating portion I, and the conductive substrate laminate A.
- the conductive substrate laminate A is placed on the movable stage 43 such as an XY stage for patterning.
- the present invention is not limited to this. That is, for example, a method in which the conductive substrate laminate A is fixed and the condensing system member is relatively moved, a method in which the laser light L is scanned and scanned using a galvano mirror, or the like described above It is possible to perform patterning in combination.
- the laminate A for a conductive substrate used in the above production method is as follows.
- the transparent conductive layer a of the laminate A for conductive substrates examples of the inorganic conductor constituting the mesh member 3 include metal nanowires such as silver, gold, and nickel.
- transparent thermoplastic resin polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polymethyl methacrylate, nitrocellulose, chlorinated polyethylene, Chlorinated polypropylene, vinylidene fluoride
- transparent curable resins silicone resins such as melamine acrylate, urethane acrylate, epoxy resin, polyimide resin, and acrylic-modified silicate
- FIG. 5 shows a modification of the present embodiment.
- a pair of transparent conductive layers a are provided on the upper and lower surfaces of the insulating substrate 11 (21) in the laminate A for conductive substrates.
- the condensing lens 42 having a focal length FL of 50 mm or more and a numerical aperture of less than 0.2
- the spread of the laser light L can be reduced. Therefore, it is easy to adjust the position of the lens, the difference in spot diameter between the both surfaces of the insulating substrate 11 (21) is reduced, and the energy density corresponding to both transparent conductive layers a is substantially equal. It is possible to form the same insulating pattern on a.
- the numerical aperture of the condenser lens 42 is larger than 0.5. It is good also as using a thing.
- the arrangement region of the conductive mesh member 3 is the conductive portion C.
- the arrangement region of the gap 5 formed by removing the mesh member 3 is an insulating portion I. That is, in the conductive part C, conduction is ensured by the mesh member 3 made of metal, and in the insulating part I, an electrical insulation state is reliably obtained by the gap 5 formed by removing the mesh member 3. It is supposed to be.
- the net member 3 made of metal nanowires dispersed in the transparent substrate 2 and electrically connected to each other remains not only in the conductive portion C but also in the insulating portion I. Therefore, it is difficult to reliably insulate the insulating portion I.
- the mesh member 3 (metal microfiber 4) of the insulating portion I is removed so as to replace the gap 5, and the insulating portion I is reliably insulated.
- the electrical characteristics (performance) of the film 12 (22) are stabilized, and the reliability as a product (input device) is enhanced.
- the mesh member 3 is removed, and a gap 5 having a shape corresponding to (corresponding to) the mesh member 3 (metal microfiber 4) is formed. That is, since the gap 5 is formed, the conductive portion C and the insulating portion I are similar in color tone and transparency to each other and are not discriminated (viewed) from each other by the naked eye. . Therefore, even if the width of the insulating portion I is increased, the wiring pattern is not visually recognized.
- the mesh member 3 is composed of metal ultrafine fibers 4 dispersed in the transparent substrate 2 and electrically connected to each other, the mesh member 3 is made of metal ultrafine fibers 4 such as commercially available metal nanowires and metal nanotubes. And can be formed relatively easily.
- the metal fine fiber 4 having silver as a main component when used, the metal fine fiber 4 can be obtained relatively easily and used as the mesh member 3. Moreover, when removing the mesh member 3 (metal fine fiber 4) of the insulating part I by laser processing, a commercially available general laser processing machine can be used. Further, the metal microfiber 4 mainly composed of silver is more preferable because it can form a colorless and transparent conductive pattern having a high light transmittance and a low surface resistivity.
- the conductive pattern is difficult to be visually recognized, and the conductive portion C in the conductive pattern has a low resistance.
- the insulating part I is reliably insulated, and stable electrical performance can be obtained.
- both the insulating substrates 11 and 21 are transparent, but either or both of these insulating substrates 11 and 21 may be colored with a certain degree of transparency. .
- the mesh member 3 is composed of a plurality of metal ultrafine fibers 4 dispersed in the transparent substrate 2 and electrically connected to each other, the present invention is not limited to this. That is, the net member 3 may be a wire grid formed by forming a conductive metal film in a grid pattern by etching or the like.
- functional layers such as adhesion, antireflection, hard coat, and dot spacer may be optionally added to the conductive substrates 10 and 20.
- a laser having a wavelength of around 1000 nm such as a fundamental wave of a YAG laser or a YVO 4 laser
- an acrylic polymer material as the functional layer
- the functional layer after laser irradiation is used from the viewpoint of appearance characteristics. Is preferably provided.
- the input device is a capacitive touch panel.
- FIG. 12 shows an input member 200 for a capacitive touch panel (input device).
- This capacitive touch panel includes upper and lower electrodes (transparent conductive films 212 and 222) that are capacitively coupled to a human body part H such as a finger through an insulating layer 240 disposed on a surface facing the input user side. An AC signal is applied to and the other electrode is measured to detect the contact state of the finger.
- the input member 200 of the capacitive touch panel has transparent conductive films 212 and 222 of a pair of electrode sheets 210 and 220 (conductive substrate) in the thickness direction (vertical direction in the figure). Are arranged toward one side (input person side) along the line.
- the input member 200 is an X-side electrode sheet on which an electrode 201a having a checkered pattern (a state in which square corners having the same shape are connected to each other, so-called check pattern) is formed.
- 210 conductive substrate
- Y-side electrode sheet 220 conductive substrate
- the electrode 201a is formed such that corners of a plurality of squares arranged along the X direction are electrically connected to each other, and the squares adjacent to each other in the Y direction are They are arranged in parallel in the Y direction while being electrically insulated from each other.
- the electrode 201b is formed such that corners of a plurality of squares arranged along the Y direction are connected to each other and extend, while the squares adjacent to each other in the X direction. They are arranged in parallel in the X direction while being electrically insulated from each other.
- the X-side electrode sheet 210 and the Y-side electrode sheet 220 are combined in a state where the electrodes 201 a and 201 b face each other without facing each other in the thickness direction.
- the X-side electrode sheet 210 is fixed to the upper surface (the surface on the input side) of the Y-side electrode sheet 220 so as to be laminated via a transparent adhesive material 250. In this state, both electrodes 201a and 201b are not overlapped in the thickness direction.
- a square-shaped isolated electrode 202a is formed in a region facing the square portion of the electrode 201b of the Y-side electrode sheet 220. Each is formed.
- the insulating portions I having a square ring shape are formed by irradiating the laser beam L, respectively.
- a small isolated electrode having a square shape with a smaller outer shape than the isolated electrode 202a. 203a is formed.
- the insulating portions I having a square ring shape are formed by irradiating the laser beam L, respectively. That is, the adjacent isolated electrode 202a and the small isolated electrode 203a share a part of the insulating part I of each other.
- a square-shaped isolated electrode 202b is formed in a region facing the square portion of the electrode 201a of the X-side electrode sheet 210. Each is formed.
- insulating portions I having a square ring shape are formed by irradiating the laser beam L, respectively.
- a small isolated electrode having a square shape with a smaller outer shape than the isolated electrode 202b is formed between the opposing corners of the square of the electrode 201b adjacent in the X direction. 203b is formed.
- the insulating portions I having a square ring shape are formed by irradiating the laser beam L, respectively. That is, the adjacent isolated electrode 202b and the small isolated electrode 203b share a part of the insulating portion I of each other.
- the mesh member 3 is disposed on the electrodes 201a and 201b and the isolated electrodes 202a and 202b to form the conductive portion C.
- the small isolated electrodes 203a and 203b are also the conductive portion C.
- the small isolated electrodes 203a and 203b are irradiated with the laser beam L so as to be filled in, so that the square insulation is formed. It does not matter as part I.
- the operation of the capacitive touch panel using the input member 200 will be described with reference to FIG.
- the human body portion H contact object
- capacitive coupling is established between the contact object H and each electrode. Is formed.
- a voltage is applied to one of the electrodes 201b of the Y-side electrode sheet 220 by using the signal source 260, and the signal (input signal) of the electrode 201a of the X-side electrode sheet 210 is detected by the detection means 270.
- the contact state between the contact object H and the input member 200 can be detected.
- the above-described special configuration can be adopted, and the following excellent operational effects can be achieved. That is, when the contact object H comes into contact as described above, the electrode 201b of the Y-side electrode sheet 220 and the contact object H pass through the isolated electrode 202a of the X-side electrode sheet 210 positioned on the electrode 201b. Capacitive coupling will be formed. Thereby, the electrode 201a of the X-side electrode sheet 210 and the electrode 201b of the Y-side electrode sheet 220 are in a state of being disposed substantially in the same layer (transparent conductive film 212). Therefore, the position of the contact object H can be detected with high accuracy.
- an isolated electrode is located in a region facing the electrode 201 b of the Y-side electrode sheet 220. It was not provided.
- no isolated electrode was provided in the region facing the electrode 201 a of the X-side electrode sheet 210.
- the electrodes 201a and 201b are not only maintained in an insulated state but also strictly controlled with a certain width between each other. That is, in the conventional configuration, the accuracy of the distance between the upper and lower electrodes 201a and 201b tends to affect the detection result, and the area for performing the insulation process is relatively large.
- the electrodes 201a and 201b are disposed in substantially the same layer (plane), the conventional distance accuracy between the upper and lower electrodes 201a and 201b is required. The detection accuracy is improved. In addition, the area of the region (insulating part I) where the insulating process is performed is greatly reduced, and the productivity is improved. Furthermore, since the chemical compositions of the electrodes 201a and 201b and the isolated electrodes 202a and 202b are the same, the conductive pattern is less likely to be recognized and the appearance is good. Further, since the small isolated electrodes 203a and 203b are formed, it is possible to further reduce the influence on the detection accuracy due to the contact of the contact object H and the assembly tolerance.
- this silver nanowire conductive film was 230 ⁇ / ⁇ , and the light transmittance was 95%.
- this silver nanowire conductive film was cut into a rectangle having a length of 210 mm and a width of 148 mm to obtain a silver nanowire conductive film test piece.
- the silver vapor deposition layer (silver film) is formed so as to provide a slight gap while a plurality of granular bodies are densely connected.
- this silver vapor-deposited conductive film was cut into a rectangle having a length of 210 mm and a width of 148 mm to obtain a silver vapor-deposited conductive film test piece.
- the condensing point is moved so as to cross the width direction of the test piece at 1 mm / second, and linear drawing (formation of an insulating pattern) )
- Duracon registered trademark
- the condensing point is moved at 100 mm / second to cross the width direction of the test piece. A straight line was drawn.
- Example 4 A straight line was drawn under the same conditions as in Example 3 except that the moving speed of the condensing point was set to 300 mm / second.
- Example 5 A straight line was drawn under the same conditions as in Example 3 except that the output was 3.6 W and the moving speed of the condensing point was 300 mm / second.
- the evaluation results are shown in Table 1.
- the evaluation criteria (A, B, C, D) were as follows. A: Excellent. The electrical resistance value exceeds 10 M ⁇ and insulation is ensured, and the conductive pattern is not visible at all. B: Good. The electrical resistance value exceeds 10 M ⁇ and insulation is ensured, and the conductive pattern is almost invisible (when the processing mark is assembled on the touch panel, the processing traces are virtually invisible). C: Yes.
- the electrical resistance value exceeds 10 M ⁇ and insulation is ensured, but the conductive pattern can be visually recognized (a level that can be used as a product (input member 1 of the input device) when assembled on a touch panel).
- D Impossible. Those with an electrical resistance of 10 M ⁇ or less and insufficient insulation, or those with scorch or perforation to the extent that they can be visually confirmed. That is, a product that cannot be used as a product (input member 1 of the input device).
- a plurality of dot spacers 30 made of an acrylic resin having a diameter of 30 ⁇ m and a height of 8 ⁇ m with a “+” mark as a mark (see FIG. 1).
- the touch panel wiring board on which the dot spacers 30 are formed and the touch panel wiring board on which the dot spacers 30 are not formed are cut into predetermined shapes, and the transparent conductive films 12 (22) are arranged to face each other. Then, using a commercially available double-sided adhesive tape, the four sides were bonded to form an input member 1 of a transparent membrane-type touch panel (input device) (see FIG. 1).
- the silver nanowire conductive film was fixed to the stage of the irradiator using the guide pin hole 280, and the outer shape mark 282 and the printing positioning mark 283 were marked under the irradiation conditions of Example 2. Further, in the Ag wiring pattern portion 284, the insulation between the lead patterns 281 and the outside thereof was performed in parallel with the pattern extending direction under the irradiation conditions of Example 2 (0.1 mm intervals).
- the insulating portion I was formed. Specifically, by forming the insulating portion I, the silver nanowire conductive film that becomes the X-side electrode sheet 210 in FIG. 13 is surrounded by the electrode 201a extending in the X direction and the electrodes 201a adjacent in the Y direction. An isolated electrode 202a and a small isolated electrode 203a sandwiched between square opposing corners of the electrode 201a adjacent in the Y direction were formed. Further, the silver nanowire conductive film to be the Y-side electrode sheet 220 in FIG.
- Electrode 14 includes an electrode 201b extending along the Y direction, an isolated electrode 202b surrounded by electrodes 201b adjacent in the X direction, and an electrode adjacent in the X direction.
- an ultraviolet curable polyester resin ink made of pentaerythritol triacrylate was applied to coat and harden the input area.
- these silver nanowire conductive films were cut out to obtain X side / Y side electrode sheets 210 and 220.
- the X-side electrode sheet 210 and the Y-side electrode sheet 220 are transparently adhered so that the electrodes 201a and 201b are projected onto the surface of the input member 200 in a checkered pattern through the isolated electrodes 202a and 202b.
- a sheet adheresive material 250 was attached to obtain an input member 200 of a capacitive touch panel (input device).
- the input member 200 thus manufactured could not visually confirm the wiring pattern in the input area, and thus the appearance was excellent.
- a capacitive touch panel interface (CY8C24094: manufactured by Cypress) was electrically connected to the input member 200 as the detecting means 270, and it was confirmed that the operation with the finger H could be performed satisfactorily.
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Abstract
Description
入力装置の導電性基板の透明導電層を構成する材料としては、錫ドープ酸化インジウム(ITO)やポリエチレンジオキシチオフェン-ポリスチレンスルホン酸に代表されるπ共役系導電性高分子(有機導電体)が広く知られている。
パターンの形成方法としては、例えば、特許文献1には、透明基材の表面の全面に、塗工により透明導電層を形成した後、CO2レーザやQスイッチを利用したパルス幅100n秒程度のYAGレーザを照射して、絶縁にする部分の透明導電層をアブレーションにより除去する方法が開示されている。
特許文献2、3には、スクリーン印刷法やグラビア印刷法等の印刷により透明基材の表面に導電部を所定のパターンで形成する方法が開示されている。
特許文献4には、透明基材の表面の全面に、塗工により透明導電層を形成した後、プラズマエッチングにより、絶縁にする部分の透明導電層を除去する方法が開示されている。
特許文献5には、バインダ(樹脂)中に金属ナノワイヤ(金属極細繊維)を分散させ硬化してなる透明導電膜に、レーザを照射して絶縁化し、導電パターンを形成する技術が開示されている。尚、透明導電膜から外部へ突出した金属ナノワイヤはレーザで除去することとしている。
特許文献6には、タッチパネル用ITO蒸着基板に対して紫外線レーザを使用し、ビーム径とレンズの焦点距離を制御し、集光エリア内の加工幅を制御することで10μm程度の微細なアブレーションにより微細パターンを形成する技術が開示されている。
すなわち本発明の入力装置は、絶縁基板、及び、前記絶縁基板上に設けられ、絶縁性を有する透明基体内に導電性を有する金属からなる網状部材を備えた透明導電膜を有する導電性基板が、厚さ方向に積層するように一対設けられた入力部材と、前記透明導電膜に電気的に接続され、入力信号を検出する検出手段と、を備え、前記透明導電膜には、前記透明基体内に前記網状部材が配置されてなる導電部と、前記透明基体内の前記網状部材の少なくとも一部が除去されてなる絶縁部と、が設けられていることを特徴とする。
本発明に係る入力装置は、例えば、透明アンテナ、透明電磁波シールド、静電容量方式或いはメンブレン式の透明タッチパネルなどの透明入力装置のように、透明部分に配線パターンを形成する製品に適用することができる。また、本発明の入力装置は、自動車のハンドル等に付随する静電容量入力装置など、3次元成型品、或いは3次元の加飾成型品の表面に設けられる静電容量センサ等に必要な電極を形成する目的で用いることができる。尚、本実施形態でいう「透明」とは、50%以上の光線透過率を有するものを差す。
入力部材1は、LCDなどの画像表示装置(不図示)の入力者側に設置されるものである。図10において、入力部材1は、例えば、行(X)方向に沿う電極100(透明導電膜12の後述する導電部Cに相当)が並列配置された導電性基板10と、この導電性基板10に対向するように画像表示装置側に配置され、行(X)方向に直交する列(Y)方向に沿う電極(透明導電膜22の導電部Cに相当)が並列配置された導電性基板20と、これらの間に設けられた透明なドットスペーサ30とを備えている。入力部材1は、入力操作により、導電性基板10の電極100と導電性基板20の電極とが直流的に接触・導通する構成とされている。
導電性基板20は、透明な絶縁基板21と、絶縁基板21において少なくとも入力者側を向く面に設けられた透明導電膜22と、を備えている。
このように、絶縁部Iにおいては、透明基体2から金属極細繊維4が除去されていることから、該透明基体2における導電部Cと絶縁部Iとでは、互いに化学的組成が異なっている。
本実施形態で説明する導電パターン形成基板(導電性基板)の製造方法では、絶縁基板11(21)の一方の面に形成された透明導電層(導電パターン形成前の透明導電膜)aに極短パルスのレーザ光Lを所定のパターンで照射する方法を用いている。
尚、以下の説明において、レーザ加工前における絶縁基板11(21)と該絶縁基板11(21)の一方の面に形成された透明導電層aとを有する積層体のことを、導電性基板用積層体Aという。
ステージ43は、絶縁基板11(21)が透明でレーザ光Lの出力が1Wを超える場合、ナイロン系若しくはフッ素系の樹脂材料、又は、シリコーンゴム系の高分子材料を用いることが好ましい。
まず、ステージ43の上面に導電性基板用積層体Aを、透明導電層aが絶縁基板11(21)より上に配置されるように載置する。
パルス幅が1p秒未満のレーザ(例えばフェムト秒レーザ)では、エネルギ密度1×1016~7×1017W/m2、単位面積あたりの照射エネルギは1×105~1×106J/m2が好ましい。
パルス幅が1~100n秒のレーザ(YAGレーザ又はYVO4レーザ)では、エネルギ密度1×1017~7×1018W/m2、単位面積あたりの照射エネルギは1×106~1×107J/m2が好ましい。
すなわち、エネルギ密度・照射エネルギが上記数値範囲よりも小さな値に設定された場合、絶縁部Iの絶縁が不十分になるおそれがある。また、上記数値範囲よりも大きな値に設定された場合、加工痕が目立つようになり、透明タッチパネルや透明電磁波シールドなどの用途では不適当となる。
また、スポット径面積Sは、下記式により定義される。
S=S0×D/FL
S0:レンズで集光されるレーザのビーム面積
FL:レンズの焦点距離
D:透明導電層aの表面(上面)と焦点との距離
導電性基板用積層体Aの透明導電層aのうち、網状部材3を構成する無機導電体としては、銀、金、ニッケルなどの金属ナノワイヤが挙げられる。また、透明導電層aのうち、透明基体2を構成する絶縁体としては、透明な熱可塑性樹脂(ポリ塩化ビニル、塩化ビニル-酢酸ビニル共重合体、ポリメチルメタクリレート、ニトロセルロース、塩素化ポリエチレン、塩素化ポリプロピレン、フッ化ビニリデン)、熱や紫外線や電子線や放射線で硬化する透明な硬化性樹脂(メラミンアクリレート、ウレタンアクリレート、エポキシ樹脂、ポリイミド樹脂、アクリル変性シリケートなどのシリコーン樹脂)が挙げられる。
また、絶縁基板11(21)の両面に形成された透明導電層aのうち、片面側の透明導電層aのみを絶縁化する場合には、集光レンズ42として開口数が0.5より大きいものを使用することとしてもよい。
特に、YAGレーザやYVO4レーザの基本波など波長が1000nm近辺のレーザを用いるとともに、上記機能層として、アクリル系高分子素材を使用する場合には、外観特性の観点から、レーザ照射後に機能層を設けることが好ましい。
次に、本発明の第2実施形態に係る入力装置について、図12~図16を参照して説明する。尚、前述の実施形態と同一部材には同一の符号を付して、その説明を省略する。
詳しくは、図15、図16に示すように、X側電極シート210は、Y側電極シート220の上面(入力者側の面)に、透明な粘着材250を介して積層されるように固着されており、この状態で、双方の電極201a、201b同士が厚さ方向に重なり合わない状態とされている。
また、X側電極シート210の透明導電膜212において、Y方向に隣り合う電極201aの正方形の対向する角部同士の間には、孤立電極202aよりも外形の小さな正方形状とされた小孤立電極203aがそれぞれ形成されている。小孤立電極203aの外周には、レーザ光Lが照射されることにより正方形環状をなす絶縁部Iがそれぞれ形成されている。すなわち、隣接する孤立電極202aと小孤立電極203aとは、互いの絶縁部Iの一部を共有している。
また、Y側電極シート220の透明導電膜222において、X方向に隣り合う電極201bの正方形の対向する角部同士の間には、孤立電極202bよりも外形の小さな正方形状とされた小孤立電極203bがそれぞれ形成されている。小孤立電極203bの外周には、レーザ光Lが照射されることにより正方形環状をなす絶縁部Iがそれぞれ形成されている。すなわち、隣接する孤立電極202bと小孤立電極203bとは、互いの絶縁部Iの一部を共有している。
この入力部材200に、表面(入力者側の表面)に形成された絶縁層240を介して手指などの人体部分H(接触物)が接触すると、接触物Hと各電極の間には容量結合が形成される。この状態で、Y側電極シート220の電極201bの1つに、信号源260を利用して電圧を印加し、X側電極シート210の電極201aの信号(入力信号)を検出手段270により検出することで、接触物Hと入力部材200との接触状況を検出することができる。
すなわち、前述のように接触物Hが接触した際に、Y側電極シート220の電極201bと接触物Hとは、該電極201b上に位置するX側電極シート210の孤立電極202aを介して、容量結合を形成することとなる。これにより、X側電極シート210の電極201aと、Y側電極シート220の電極201bとは、実質的に同一層(透明導電膜212)内に配置された状態とされている。従って、接触物Hの位置を精度よく検出することができる。
また、絶縁化処理を行う領域(絶縁部I)の面積が大幅に削減されることとなり、生産性が向上する。
さらに、電極201a、201b及び孤立電極202a、202bの化学的組成が同一であることから、導電パターンがより認識されにくくなり、外観が良い。
また、小孤立電極203a、203bが形成されていることで、接触物Hの接触時や組立公差による検出精度への影響をより低減できる。
厚さ100μmの透明なポリエステル(PET)フィルム(絶縁基板11、21)に、Cambrios社のOhm(商品名)インク(金属極細繊維4)を塗布乾燥後、紫外線硬化性のポリエステル樹脂インク(透明基体2)を上塗りして、乾燥・紫外線処理を施すことにより、PETフィルム上に線径50nm程度、長さ15μm程度の銀繊維(金属極細繊維4)からなる導電性の2次元ネットワーク(網状部材3)を有する耐摩擦性の透明導電層aを形成した(図2)。
次いで、この銀ナノワイヤ導電フィルムを、長さ210mm、幅148mmの長方形に切断加工し、銀ナノワイヤ導電フィルム試験片とした。
厚さ100μmの透明なPETフィルムの片面にシリコーンアクリルのハードコート層を設けたものを用意し、このハードコート層とは反対の面に、マグネトロンスパッタ装置により厚さ60nmの酸化亜鉛膜を形成した。次いで、その酸化亜鉛膜の表面に、マグネトロンスパッタ装置を用いて、厚さ27nmの銀膜を形成した。さらに、この銀膜の表面に、上記酸化亜鉛膜と同様にして、厚さ60nmの酸化亜鉛膜を形成した(図6)。これにより、PETフィルム上に酸化亜鉛膜及び銀膜からなる導電性の2次元ネットワークを有する透明導電層が形成された。詳しくは、図6に示すように、銀蒸着層(銀膜)は、複数の粒状体が密集して連結されつつも、若干の隙間を設けるようにして形成されている。
次いで、この銀蒸着導電フィルムを、長さ210mm、幅148mmの長方形に切断加工し、銀蒸着導電フィルム試験片とした。
波長750nm、出力10mW、パルス幅130f秒、繰り返し周波数1kHz、ビーム径5mmのフェムト秒レーザ(製造装置40)を用い、焦点距離FL=100mmの集光レンズ42とガルバノミラーを使用して、試験片を厚さ5mmのガラス板上に、前記透明導電層がガラス板とは反対側を向くように載置し、該試験片における前記透明導電層の表面から集光レンズ42側に向かって1.5mm離間した位置にレーザ光Lの焦点Fが設定されるように調整した後、集光点を1mm/秒で試験片の幅方向に横断させるように移動して、直線描画(絶縁パターンの形成)を行った。
レーザ光Lの焦点Fを、前記透明導電層の表面上とした以外は実験例1と同様の条件として、直線描画を行った。
波長1064nm、出力12W、パルス幅20n秒、繰り返し周波数100kHz、ビーム径6.7mmのYVO4レーザ(製造装置40)を用い、焦点距離FL=300mmの集光レンズ42とガルバノミラーを使用して、試験片を厚さ5mmのジュラコン(登録商標)板上に、前記透明導電層がジュラコン(登録商標)板とは反対側を向くように載置し、該試験片における前記透明導電層の表面から集光レンズ42側に向かって3mm離間した位置にレーザ光Lの焦点Fが設定されるように調整した後、集光点を100mm/秒で試験片の幅方向に横断させるように移動して、直線描画を行った。
集光点の移動速度を300mm/秒とした以外は、実施例3と同様の条件として、直線描画を行った。
出力を3.6W、集光点の移動速度を300mm/秒とした以外は、実施例3と同様の条件として、直線描画を行った。
レーザ光Lの焦点Fを、前記透明導電層の表面上とした以外は実験例4と同様の条件として、直線描画を行った。
実験例4と同様の条件として、同一箇所に繰り返し5回の直線描画を行った。
波長10.6μm、出力15Wの炭酸ガスレーザ(連続発振)を用い、焦点距離FL=300mmの集光レンズ42とガルバノミラーを使用して、試験片における前記透明導電層の表面から集光レンズ42側に向かって3mm離間した位置にレーザ光Lの焦点Fが設定されるように調整した後、集光点を300mm/秒で試験片の幅方向に横断させるように移動して、直線描画を行った。
尚、評価の基準(A、B、C、D)は、下記の通りとした。
A:優良。電気抵抗値が10MΩを超えて絶縁が確実になされており、かつ、導電パターンが全く視認できないもの。
B:良。電気抵抗値が10MΩを超えて絶縁が確実になされており、かつ、導電パターンが殆んど視認できないもの(タッチパネルに組み上げた際に、実質的に加工痕が視認できないもの)。
C:可。電気抵抗値が10MΩを超えて絶縁が確実になされているが、導電パターンが視認できるもの(タッチパネルに組み上げた際に、製品(入力装置の入力部材1)として用いることができる程度のレベル)。
D:不可。電気抵抗値が10MΩ以下であり絶縁化が不十分のもの、又は、目視で確認できる程度に焼き焦げや穴あきが形成されたもの。すなわち、製品(入力装置の入力部材1)として使用できないもの。
次に、前述した透明導電膜及び導電性基板を用いた本発明のメンブレン式タッチパネル(配線基板)用の入力部材1の製造例について説明する。
次いで「+」マークを基点に、実験例2の条件でコネクタパターンを横断する形で絶縁パターンを形成し、25mm角の入力エリアを持つタッチパネル用配線基板を得た。尚、このタッチパネル用配線基板は一対用意し、テスタで確認したところ、これらタッチパネル用配線基板は、入力エリア端部における配線パターン間が絶縁状態であった。
このように製造されたタッチパネルの入力部材1は、ドットスペーサ30、配線パターンとも目に付かず、また、キーマトリクスとして機能することが確認された。
予めドットスペーサ30を印刷した導電性基板用積層体Aに、製造例3と同様の条件でパターニングを行ったところ、ドットスペーサ30が黒く変色したものが目視で確認された。
図11に示すように、製造例3で得られた5行5列のメンブレン式タッチパネル用の入力部材1を、インターフェイス回路(検出手段)を使用して行側、列側それぞれ5bitのポート121、122に接続し、押圧箇所に対応する出力が得られることを確認した。
このとき、電源電圧は5V、電流制限抵抗102は3kΩ、プルアップ・プルダウン抵抗103は200Ω、行方向・列方向のトランジスタ104a、104bのhfeは約200のものを使用した。
製造例1の銀ナノワイヤ導電フィルムを、2つ用意した。図13、図14に示すように、各銀ナノワイヤ導電フィルムに、位置決め用のガイドピン孔280を設けた。また、これら銀ナノワイヤ導電フィルムに、スクリーン印刷によりAgペースト(ドータイト(登録商標)FA301CA:藤倉化成株式会社製)を印刷し、これを100℃・15分間乾燥させることで、引き出しパターン281をそれぞれ形成した。
さらに、Ag配線パターン部284で、引き出しパターン281同士の間及び外側をパターンの延在方向に平行に、実施例2の照射条件で照射して絶縁化した(0.1mm間隔)。
詳しくは、絶縁部Iを形成することにより、図13のX側電極シート210となる銀ナノワイヤ導電フィルムには、X方向に沿って延びる電極201a、Y方向に隣り合う電極201a同士に囲まれた孤立電極202a、Y方向に隣り合う電極201aの正方形の対向する角部同士に挟まれた小孤立電極203aを形成した。
また、図14のY側電極シート220となる銀ナノワイヤ導電フィルムには、Y方向に沿って延びる電極201b、X方向に隣り合う電極201b同士に囲まれた孤立電極202b、X方向に隣り合う電極201bの正方形の対向する角部同士に挟まれた小孤立電極203bを形成した。
次いで、X側電極シート210とY側電極シート220とを、電極201a、201bが入力部材200の表面に孤立電極202a、202bを介し市松模様に組み合わされた形で投影されるように、透明粘着シート(粘着材250)で貼り合わせ、静電容量式タッチパネル(入力装置)の入力部材200を得た。
次いで、この入力部材200に、検出手段270として静電容量式タッチパネルインターフェイス(CY8C24094:Cypress社製)を電気的に接続し、手指Hによる操作が良好に行えることを確認した。
2 透明基体
3 網状部材
4 金属極細繊維
5 空隙
10、20 導電性基板
11、21 絶縁基板
12、22、212、222 透明導電膜
100 電極(導電部)
201a、201b 電極(導電部)
202a、202b 孤立電極(導電部)
210 X側電極シート(導電性基板)
220 Y側電極シート(導電性基板)
270 検出手段
C 導電部
I 絶縁部
Claims (10)
- 絶縁基板、及び、前記絶縁基板上に設けられ、絶縁性を有する透明基体内に導電性を有する金属からなる網状部材を備えた透明導電膜を有する導電性基板が、厚さ方向に積層するように一対設けられた入力部材と、
前記透明導電膜に電気的に接続され、入力信号を検出する検出手段と、を備え、
前記透明導電膜には、前記透明基体内に前記網状部材が配置されてなる導電部と、前記透明基体内の前記網状部材の少なくとも一部が除去されてなる絶縁部と、が設けられていることを特徴とする入力装置。 - 請求項1に記載の入力装置であって、
前記絶縁部には、前記網状部材が除去されることにより形成された空隙が配置されていることを特徴とする入力装置。 - 請求項1又は2に記載の入力装置であって、
前記網状部材は、前記透明基体内に分散されて互いに電気的に連結された金属極細繊維からなることを特徴とする入力装置。 - 請求項3に記載の入力装置であって、
前記金属極細繊維は、銀を主成分としていることを特徴とする入力装置。 - 請求項2~4のいずれか一項に記載の入力装置であって、
前記絶縁部の空隙が、前記網状部材にパルス状レーザを照射して形成されたことを特徴とする入力装置。 - 請求項5に記載の入力装置であって、
前記パルス状レーザは、パルス幅1p秒未満の極短パルスレーザであることを特徴とする入力装置。 - 請求項5に記載の入力装置であって、
前記パルス状レーザは、YAGレーザ又はYVO4レーザであることを特徴とする入力装置。 - 請求項1~7のいずれか一項に記載の入力装置であって、
前記絶縁基板は、透明であることを特徴とする入力装置。 - 請求項1~8のいずれか一項に記載の入力装置であって、
前記入力部材は、一対の前記導電性基板の前記透明導電膜を前記厚さ方向に沿う一方側へ向けてそれぞれ配置しており、
前記検出手段は、静電容量式であることを特徴とする入力装置。 - 請求項1~8のいずれか一項に記載の入力装置であって、
前記入力部材は、一対の前記導電性基板の前記透明導電膜同士を接近した状態で間隔をあけ対向配置しており、
入力操作によって、前記透明導電膜の一部同士が直流的に接触可能とされていることを特徴とする入力装置。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
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| PCT/JP2010/004058 WO2011158299A1 (ja) | 2010-06-17 | 2010-06-17 | 入力装置 |
| US13/704,343 US20140063360A1 (en) | 2010-06-17 | 2010-06-17 | Input device |
| JP2012520166A JP5590627B2 (ja) | 2010-06-17 | 2010-06-17 | 入力装置 |
| CN201080068573.8A CN103069369B (zh) | 2010-06-17 | 2010-06-17 | 输入装置 |
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/JP2010/004058 WO2011158299A1 (ja) | 2010-06-17 | 2010-06-17 | 入力装置 |
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| Country | Link |
|---|---|
| US (1) | US20140063360A1 (ja) |
| JP (1) | JP5590627B2 (ja) |
| CN (1) | CN103069369B (ja) |
| WO (1) | WO2011158299A1 (ja) |
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| JP2012032864A (ja) * | 2010-07-28 | 2012-02-16 | Shin Etsu Polymer Co Ltd | 入力装置 |
| JP2012164553A (ja) * | 2011-02-08 | 2012-08-30 | Shin Etsu Polymer Co Ltd | 導電パターン形成基板の製造方法及び導電パターン形成基板 |
| JP2013182517A (ja) * | 2012-03-02 | 2013-09-12 | Shin Etsu Polymer Co Ltd | 透明配線シート |
| JP2013232291A (ja) * | 2012-04-27 | 2013-11-14 | 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 |
| US20140168532A1 (en) * | 2012-12-19 | 2014-06-19 | Chih-Chung Lin | Polarizer structure |
| JP2014115739A (ja) * | 2012-12-06 | 2014-06-26 | Hitachi Chemical Co Ltd | 表示装置 |
| JP2016162370A (ja) * | 2015-03-04 | 2016-09-05 | 株式会社アルバック | タッチパネルおよび透明導電性基板 |
| JP2017004136A (ja) * | 2015-06-08 | 2017-01-05 | アルプス電気株式会社 | 車載入力装置 |
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| CN111129090B (zh) * | 2019-12-18 | 2022-05-31 | 武汉华星光电半导体显示技术有限公司 | 显示面板及其测试方法 |
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| JP2012028025A (ja) * | 2010-07-20 | 2012-02-09 | Shin Etsu Polymer Co Ltd | 導電パターン形成基板の製造方法及び導電パターン形成基板 |
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| JP2014115739A (ja) * | 2012-12-06 | 2014-06-26 | Hitachi Chemical Co Ltd | 表示装置 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103069369B (zh) | 2016-05-18 |
| JP5590627B2 (ja) | 2014-09-17 |
| US20140063360A1 (en) | 2014-03-06 |
| JPWO2011158299A1 (ja) | 2013-08-15 |
| CN103069369A (zh) | 2013-04-24 |
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