WO2008015902A1 - 液晶表示装置の製造方法及び液晶表示装置 - Google Patents
液晶表示装置の製造方法及び液晶表示装置 Download PDFInfo
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- WO2008015902A1 WO2008015902A1 PCT/JP2007/064070 JP2007064070W WO2008015902A1 WO 2008015902 A1 WO2008015902 A1 WO 2008015902A1 JP 2007064070 W JP2007064070 W JP 2007064070W WO 2008015902 A1 WO2008015902 A1 WO 2008015902A1
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- liquid crystal
- crystal display
- display device
- transparent
- conductive layer
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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
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
- G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
-
- 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
- G02F2202/00—Materials and properties
- G02F2202/22—Antistatic materials or arrangements
Definitions
- the present invention relates to a method for manufacturing a liquid crystal display device and a liquid crystal display device, and more specifically, a method for manufacturing a liquid crystal display device having a transparent conductive layer excellent in light transmittance, resistance characteristics, uniformity, and substrate adhesion. And a liquid crystal display device.
- an active matrix liquid crystal display device using TFTs has an active matrix substrate in which pixel electrodes and TFTs for controlling voltages applied to the pixel electrodes are arranged in a matrix.
- the liquid crystal is sandwiched between the active matrix substrate and the counter substrate, and the liquid crystal is driven by a voltage applied between the pixel electrode and the other electrode.
- a vertical electric field type liquid crystal display device in which the pixel electrode of the active matrix substrate is configured by a transparent electrode, and the liquid crystal is driven by applying a voltage between the transparent electrode and the transparent common electrode formed on the opposite substrate as the other electrode
- a horizontal electric field type liquid crystal display device in which a pixel electrode of an active matrix substrate and a common electrode are paired, and a liquid crystal is driven by applying a voltage between these electrodes.
- the TFT and the pixel electrode are formed by photolithography.
- a liquid crystal display device called a horizontal electric field method is contrasted with a liquid crystal display device called a vertical electric field method, and is a transparent substrate disposed opposite to each other through a liquid crystal layer.
- a display electrode and a reference electrode are provided on a region surface corresponding to a unit pixel on one or both of the liquid crystal layers, and are generated between the display electrode and the reference electrode in parallel with the transparent substrate.
- the light transmitted through the liquid crystal layer is modulated by an electric field.
- a vertical electric field type liquid crystal display device is a pixel comprising a transparent electrode on each area surface corresponding to a unit pixel on the liquid crystal layer side of a transparent substrate disposed opposite to each other via a liquid crystal layer.
- An electrode and a common electrode are provided facing each other, and a transparent electrode is provided between the pixel electrode and the common electrode.
- the light transmitted through the liquid crystal layer is modulated by the electric field generated perpendicular to the bright substrate.
- the horizontal electric field type liquid crystal display device can recognize a clear image even when observed from a large angle field of view with respect to the display surface, and is excellent in the so-called angle field of view.
- Such a horizontal electric field type liquid crystal display device has a conventional vertical electric field type in which a display abnormality occurs when a high potential such as static electricity is applied from the outside of the surface of the liquid crystal display panel. It causes the harmful effects seen in liquid crystal display devices. That is, a horizontal electric field type liquid crystal display device has a conductive layer having a shielding function against static electricity from the outside between a display electrode and a reference electrode arranged in parallel or substantially parallel with a liquid crystal in between. It has a configuration that does not have. If such a conductive layer is disposed, the electric field from the display electrode is terminated not on the reference electrode side but on the conductive layer side, and appropriate display by the electric field cannot be performed. Because.
- the electric field corresponding to the video signal generated in parallel with the transparent substrate is between the display electrode and the reference electrode. It will be influenced by etc. This external static electricity or the like is charged in the liquid crystal display panel itself, and this charging generates an electric field perpendicular to the transparent substrate.
- a conductive layer having translucency is formed on a surface opposite to the liquid crystal layer of the transparent substrate by a sputtering method.
- a liquid crystal display device capable of preventing the occurrence of display abnormality even when a high potential such as static electricity is applied from the outside of the surface (see, for example, Patent Document 1).
- Patent Document 1 Japanese Patent No. 2758864
- the present invention has been made in view of the above problems, and its purpose is to produce a liquid crystal display device having a transparent conductive layer excellent in light transmittance, resistance characteristics, uniformity, and adhesion to a substrate.
- a method and a liquid crystal display device are provided.
- a liquid crystal display panel and a knock light unit for transmitting light to the display surface side of the liquid crystal display panel are provided, and the liquid crystal display panels are arranged to face each other with a liquid crystal layer interposed therebetween.
- a display electrode and a reference electrode are provided on a surface of the transparent substrate corresponding to a unit pixel on one or both of the liquid crystal layers, and a video signal line force is provided via the reference electrode and at least the switching element.
- the light transmitted through the liquid crystal layer is modulated by an electric field generated in parallel with the transparent substrate between the display electrodes to which the video signal is supplied. !
- the transparent substrate located on the side far from the backlight unit is the transparent substrate on the side where the switching element is formed, and the transparent substrate.
- a transparent conductive layer having translucency is provided on the side opposite to the liquid crystal layer, and the transparent conductive layer is applied to at least the pixel region by an atmospheric pressure plasma method using at least nitrogen gas as a thin film forming gas.
- a method of manufacturing a liquid crystal display device characterized by comprising: [0013] 2.
- a display electrode and a reference electrode are formed on a region surface corresponding to a unit pixel on the one liquid crystal layer side.
- the liquid crystal layer is transmitted by an electric field generated in parallel with the transparent substrate between the reference electrode and the display electrode to which the video signal from the video signal line is supplied via at least the switching element. 2.
- a transparent conductive layer having translucency on the surface of the transparent substrate opposite to the liquid crystal layer is used as a thin film forming gas. 4.
- a liquid crystal display panel and a knock light unit for transmitting light to the display surface side of the liquid crystal display panel are provided, and the liquid crystal display panels are arranged to face each other via a liquid crystal layer.
- a display electrode and a reference electrode are provided on a surface of the transparent substrate corresponding to a unit pixel on one or both of the liquid crystal layers, and a video signal line force is provided via the reference electrode and at least the switching element.
- the liquid crystal display device having a configuration in which light transmitted through the liquid crystal layer is modulated by an electric field generated in parallel with the transparent substrate between the display electrodes to which the video signal is supplied.
- the transparent substrate located on the side far from the backlight unit is the transparent substrate on the side where the switching element is formed, and the transparent substrate.
- a transparent conductive layer having translucency is provided on the side opposite to the liquid crystal layer, and the transparent conductive layer is formed on at least the pixel region by an atmospheric pressure plasma method using at least nitrogen gas as a thin film forming gas.
- a display electrode and a reference electrode are formed on a region surface corresponding to a unit pixel on the one liquid crystal layer side.
- the liquid crystal layer is transmitted by an electric field generated in parallel with the transparent substrate between the reference electrode and the display electrode to which the video signal from the video signal line is supplied via at least the switching element.
- a transparent conductive layer having translucency on the surface of the transparent substrate opposite to the liquid crystal layer is used as a thin film forming gas.
- FIG. 1 is a schematic cross-sectional view showing an example of the configuration of a liquid crystal display device provided with a backlight unit of the present invention.
- FIG. 2 is a schematic cross-sectional view showing an example of the configuration of a liquid crystal display element that performs full-color display.
- FIG. 3 is a schematic sectional view showing another example of the configuration of the liquid crystal display element of the present invention.
- FIG. 4 is a schematic view showing an example of a remote atmospheric pressure plasma discharge treatment apparatus according to the present invention.
- FIG. 5 is a schematic view showing another example of a remote atmospheric pressure plasma discharge treatment apparatus according to the present invention.
- FIG. 6 is a schematic view showing an example of a direct type atmospheric pressure plasma discharge treatment apparatus according to the present invention.
- the present inventor has a liquid crystal display panel and a backlight unit for transmitting light to the display surface side of the liquid crystal display panel, and the liquid crystal display panel Is provided with a display electrode and a reference electrode on a region surface corresponding to a unit pixel on one or both liquid crystal layer sides of a transparent substrate disposed opposite to each other with a liquid crystal layer interposed therebetween.
- the liquid crystal layer is transmitted by an electric field generated in parallel with the transparent substrate between the reference electrode and the display electrode to which a video signal such as a video signal line force is supplied via at least a switching element.
- a transparent substrate located on a side far from the backlight unit among the transparent substrates of the liquid crystal display panel has the switching element formed thereon.
- a liquid crystal display device manufacturing method characterized in that it is formed in at least the pixel region by an atmospheric pressure plasma method using nitrogen gas, and has excellent transparency, resistance characteristics, uniformity, substrate adhesion and hardness. It has been found that a method for manufacturing a liquid crystal display device having a conductive layer can be realized, and the present invention has been achieved.
- a method of forming a transparent conductive layer by applying a coating liquid containing conductive fine particles as described above to the surface of a liquid crystal display element component There is a method of forming a transparent conductive layer by applying a coating liquid containing conductive fine particles as described above to the surface of a liquid crystal display element component.
- a conductive film formed by a coating method is used. Since the film needs to be sintered at a high temperature after it is dried, the liquid crystal display element parts themselves are exposed to a high temperature and the influence on them is large. Also, it takes a lot of time to form a conductive film. Furthermore, it is extremely difficult to form a conductive film having a uniform film thickness on the assembled liquid crystal display element surface, and if the light transmittance of the formed conductive film is lowered, the adhesion to the substrate is low. Have a problem.
- the method of forming a conductive film by a vacuum deposition method must be performed under severe conditions such as under vacuum, which may affect the characteristics and quality of the assembled liquid crystal display element parts.
- the manufacturing process is difficult to assemble and there are obstacles such as large scale.
- a short circuit occurs in the electrode part and damage to the transparent substrate is likely to occur. It was found to cause damage.
- the present inventor has obtained an atmospheric pressure plasma using at least nitrogen gas as a thin film forming gas on a transparent substrate which is a surface member of the assembled liquid crystal display element.
- the conductive film can be formed at or near atmospheric pressure, and the processing temperature at the time of forming the conductive film can be suppressed to a relatively low temperature. It was possible to obtain a transparent conductive layer excellent in light transmittance, resistance characteristics, and substrate adhesion by a simple method that could suppress the influence and cause no short circuit breakage of the transparent substrate.
- FIG. 1 is a schematic cross-sectional view showing an example of a configuration of a liquid crystal display device including a backlight unit of the present invention.
- a liquid crystal display panel 100 is a liquid in which both ends are sealed with a seal member 105.
- a transparent substrate 103A and a transparent substrate 103B are arranged at positions facing each other through the crystal layer 104, and the main surface side (the upper side in the drawing) of the transparent substrate 103A is the observation side.
- a backlight unit 107 is disposed on the transparent substrate 103B side, and uniform observation light is emitted from the backlight unit 107 over almost the entire area of the transparent substrate 103B.
- the transparent substrate in the present invention means that the average transmittance in the visible light region is 90% or more.
- the liquid crystal layer 104 formed between the transparent substrate 103A and the transparent substrate 103B is arranged in a matrix in the lateral direction of the liquid crystal layer 104 together with an electronic circuit formed on the liquid crystal layer 104 side of each transparent substrate. A plurality of pixels are formed!
- the set of pixels arranged in a matrix form a display area when observed from the transparent substrate 103A side.
- Each pixel constituting the display area is controlled to transmit light from the backlight unit 107 independently by supplying a signal through an electronic circuit. Any image can be imaged.
- the horizontal electric field type liquid crystal display panel 100 configured in this manner is similar to that of the vertical electric field type in that the surface of the transparent substrate 103A opposite to the liquid crystal layer 104 (the surface on the observation side) and the transparent substrate Polarizers 101 and 106 are respectively attached to the surface of 103B opposite to the liquid crystal layer 104 (the surface on the backlight unit 107 side).
- liquid crystal display element of the present invention in particular, an atmospheric pressure plasma method using at least nitrogen gas as a thin film forming gas V between the polarizing plate 101 attached to the transparent substrate 103A and the transparent substrate 103A. And a transparent conductive layer 102 formed by the method described above.
- the transparent conductive layer 102 functions as a conductive film that shields against static charges from the outside! /
- FIG. 2 is a schematic cross-sectional view showing an example of the configuration of a liquid crystal display element that performs full-color display.
- the array substrate 2 includes an alignment film 10a, a transparent electrode film 9 and a transparent substrate 5a in this order via the liquid crystal layer 3, and the transparent substrate 5a has a surface opposite to the transparent electrode.
- a backlight 13 is provided.
- the transparent electrode 9 corresponds to the horizontal electric field method, and is patterned to form an independent electrode pair for each pixel, but may be omitted in the figure.
- the array substrate 2 includes a seal member 4 formed in a peripheral region surrounding a display region provided with a liquid crystal layer 3 including a liquid crystal 13, and the liquid crystal layer 3 includes a small amount of a solid spherical spacer 11 (for example, 0.3 mass%).
- the color filter substrate 1 includes a central color pixel area 7R, 7G, 7B and a peripheral black matrix area 6.
- a transparent substrate 5b is disposed above the central color pixel region, and has a transparent conductive layer 12 formed thereon by an atmospheric pressure plasma method using at least a rare gas as a thin film forming gas.
- the liquid crystal display element is assembled by placing the array substrate 2 and the color filter substrate 1 at a distance in the vacuum chamber of the vacuum assembly apparatus, and placing the color filter substrate 1 and the array substrate 2 under normal pressure. Place exactly on top.
- the color filter substrate 1 is superimposed on the array substrate 2 by bringing the two substrates together while reducing the pressure in the vacuum chamber.
- the sealing member is bonded with an adhesive containing a resin that is cured by application of ultraviolet rays, and then the transparent conductive layer 12 is formed on the transparent substrate 5b by an atmospheric pressure plasma method using a rare gas.
- Liquid crystal is injected into the liquid crystal layer 3 from the opening of the seal member by a vacuum insertion method, and the opening of the seal member 4 is sealed to form a liquid crystal display element that performs full color display.
- a seal member 4 is provided in a peripheral region surrounding the display region before the transparent substrate is overlaid on the method of injecting liquid crystal into the liquid crystal layer after the liquid crystal display element is assembled. After that, drop the liquid crystal on it, then cover the upper part with the liquid crystal layer.
- This method is called a liquid crystal dropping method (One Drop Fill method, ODF method), and this ODF method is also applied to the manufacturing method of the liquid crystal display element of the present invention. It is preferable. Details of the ODF method can be referred to, for example, the technology disclosed in US Pat. No. 5,263,888 (Teruhisa Ishihara et al., November 23, 1993).
- FIG. 3 is a schematic sectional view showing another example of the configuration of the liquid crystal display element of the present invention.
- a plurality of pairs of electrodes 9 are arranged on one surface side with the liquid crystal layer 3 interposed therebetween, and a voltage is independently applied to each independent electrode pair.
- This is a method using a horizontal electric field method in which the orientation of the liquid crystal (polarizer) in the liquid crystal layer is changed to display an image.
- FIGS. 1 to 3 the lateral electric field method in which an electrode is provided on one surface side of a transparent substrate with a liquid crystal layer interposed therebetween has been described.
- a liquid crystal A vertical electric field method in which electrodes are provided on both sides of a layer can also be adopted.
- the liquid crystal display element of the present invention has a transparent conductive layer having translucency on the side of the transparent substrate opposite to the liquid crystal layer, and this transparent conductive layer (also referred to as a transparent conductive film) is used as a thin film forming gas. It is characterized in that it is formed at least in the pixel region by an atmospheric pressure plasma method using nitrogen gas.
- the transparent conductive layer having translucency in the present invention refers to a transparent conductive layer having an average transmittance of 90% or more in the visible light region.
- InO InO
- ITO Sn-doped indium oxide
- ZnO In O—ZnO amorphous oxide (IZO), Zn doped with A1 (AZO), Ga
- the transparent conductive layer forming materials prefferably have at least one of the transparent conductive layer forming materials to be formed as a main component.
- ITO and AZO films have an amorphous structure or a crystalline structure.
- the IZO film has an amorphous structure.
- the surface resistivity of the transparent conductive layer is preferably 1 ⁇ 10 9 ⁇ well or less, more preferably IX 10 6 ⁇ well or less.
- the method for forming a transparent conductive layer according to the present invention is characterized in that the raw material is formed using an atmospheric pressure plasma method in which plasma treatment is performed under atmospheric pressure or a pressure near atmospheric pressure.
- the reactive gas used to form the metal oxide layer that is the main component of the transparent conductive layer includes metal alkoxide, alkyl metal, ⁇ -diketonate, metal, which are a kind of metal organic compounds.
- metal alkoxide alkyl metal, ⁇ -diketonate, metal, which are a kind of metal organic compounds. Examples include carboxylates and metal dialkylamides. Further, double alkoxides composed of two types of metal alkoxides partially substituted with other organic groups can be used, but those having volatility are particularly preferably used.
- indium hexafluoropentandionate indium methyl (trimethyl) acetyl acetate, indium acetyl acetate toner, indium isoporopoxide, indium trifluoropentane dinate, tris (2 , 2, 6, 6-tetramethyl-1,3,5-heptanedionate) indium, ee eta-butinolebis (2,4 pentanedionate) tin, ee eta-butinoresiacetoxytin, zi-t
- examples include butinoresinacetoxy tin, tetraisopropoxy tin, tetrabutoxy tin, and zinc acetyl cetate.
- indium acetyl cetate tris (2, 2, 6, 6-tetramethyl-3,5-heptanedionate) indium
- zinc acetyl cetate and di-n-butyl.
- Diacetoxy tin Among the above compounds, tin oxide film (SnO)
- dibutyltin diacetate, tetrabutyltin, tetramethyltin or the like is preferable.
- the acid / tin film may contain fluorine or antimony.
- Examples of reactive gases used for doping include aluminum isopropoxide, nickel acetyl cetate, manganese acetyl cetate, boron isopropoxide, n-butoxy antimony, tri-n-butyl antimony, G-n-Butylbis (2,4-pentanedionate) tin, G-n-Butinoresidacetoxytin, G-Butinoresilacetoxytin, Tetraisopropoxytin, Tetrabutoxytin, Tetraptyltin, Zinc cetylacetonate, Mention may be made of propylene hexafluoride, cyclobutane octafluoride, methane tetrafluoride and the like.
- Examples of the reactive gas used to adjust the resistance value of the transparent conductive layer include titanium triisopropoxide, tetramethoxysilane, tetraethoxysilane, and hexamethinoresylsiloxane.
- the atmospheric pressure plasma method which performs plasma processing near atmospheric pressure, is more productive than the plasma CVD method under vacuum, because it has a higher plasma density and a higher productivity.
- the mean free path of gas is very short, so an extremely flat film can be obtained.
- a flat film has good optical properties.
- the transparent conductive layer according to the present invention is excited by supplying a gas containing a transparent conductive layer forming gas to a discharge space in which a high-frequency electric field is generated under atmospheric pressure or a pressure in the vicinity thereof, thereby The transparent conductive layer is formed on the transparent substrate by exposure to the excited gas.
- the atmospheric pressure or the pressure in the vicinity thereof in the present invention is about 20 kPa to: LlOkPa, and 93 kPa to 104 kPa is preferable for obtaining the good effects described in the present invention.
- the excited gas as used in the present invention means that at least a part of molecules in the gas move to a state where the existing state force is higher when energy is obtained.
- the pressure between the counter electrodes (discharge space) is set to atmospheric pressure or a pressure near it, and a gas containing a discharge gas and a metal oxide forming gas (transparent conductive layer forming gas) is introduced between the counter electrodes, A high-frequency voltage is applied between the opposing electrodes to change the metal oxide forming gas into a plasma state, and the substrate is then exposed to the metal oxide forming gas in a plasma state, so that the transparent substrate is transparent. A bright conductive layer is formed.
- the gas used is basically a gas containing a discharge gas and a transparent conductive layer forming gas as constituent components.
- the discharge gas is in an excited state or a plasma state in the discharge space, and has a transparent conductive layer type.
- Nitrogen gas is used as a gas that plays the role of applying energy to the formed gas to bring it into an excited or plasma state.
- Nitrogen gas is preferably contained in an amount of 70.0 to 99.9% by volume with respect to 100% by volume of the total gas.
- the transparent conductive layer forming gas receives energy from the discharge gas in the discharge space to be in an excited state or a plasma state to form a transparent conductive thin film. It is a gas, or a gas that controls the reaction or accelerates the reaction.
- the transparent conductive layer forming gas rather preferably be contained 01 to 30% by volume 0.1 in total gas, more preferably from 0.1 to 3 volume 0/0.
- the transparent conductive layer according to the present invention can be formed by exposing a discharge gas and an acidic gas to a gas excited to a plasma state.
- the inert gas include oxygen, ozone, hydrogen peroxide, and carbon dioxide.
- the discharge gas at this time helium and argon gas can be selected.
- the concentration of the oxidizing gas component in the mixed gas consisting of the oxidizing gas and the discharge gas is preferably 0.0001 to 30% by volume, more preferably 0.001 to 15% by volume, especially 0.01. It is preferable to contain -10 volume%.
- the optimum value of each concentration of gas can be appropriately selected depending on the substrate temperature, the number of oxidation treatments, and the treatment time.
- Chide monkey be mixed numbers 0/0 to several tens 0/0 of argon, a rare gas such as helium.
- One method is a so-called remote type atmospheric pressure plasma discharge treatment apparatus.
- a high frequency voltage is applied between the electrodes, a mixed gas containing a discharge gas is supplied between the counter electrodes, the mixed gas is turned into plasma, and then the mixed gas formed into plasma and the transparent conductive layer forming gas are mixed. After that, the transparent conductive layer is formed by spraying on the transparent substrate.
- the other method is a direct-type atmospheric pressure plasma discharge treatment apparatus, which mixes a mixed gas containing a discharge gas and a transparent conductive layer forming gas, and then, between the counter electrodes, a transparent substrate. In this state, the gas is introduced into the discharge space and a high frequency voltage is applied between the opposing electrodes to form a transparent conductive layer on the transparent substrate.
- a remote type atmospheric pressure plasma method that is, a method using a remote type atmospheric pressure plasma discharge treatment apparatus in which a substrate to be formed is not disposed between electrodes is more preferable.
- FIG. 4 is a schematic diagram showing an example of a remote atmospheric pressure plasma discharge treatment apparatus according to the present invention.
- the present invention is not limited to this.
- the following explanation may include assertive expressions for terms and the like, but these show preferred examples of the present invention, and the meaning and technical scope of the terms of the present invention are shown. It is not limited.
- an atmospheric pressure plasma discharge treatment apparatus 21 is provided in parallel with a pair of electrodes 41 a and 41 b connected to a power source 31 in parallel. At least one of the electrodes 41a and 41b is covered with a dielectric 42, and a high frequency voltage is applied by a power source 31 to a discharge space 43 formed between the electrodes.
- the inside of the electrodes 41a and 41b has a hollow structure 44 so that heat generated by the discharge can be taken by water, oil, etc. during discharge and heat exchange can be performed so as to maintain a stable temperature. There is.
- the gas 22 containing the discharge gas necessary for the discharge is supplied to the discharge space 43 through the flow path 24 by each gas supply means, and a high frequency voltage is applied to the discharge space 43.
- the gas 22 including the discharge gas is turned into plasma.
- the plasma gas 22 is ejected to the mixing space 45.
- the mixed gas 23 containing the gas necessary for forming the transparent conductive layer supplied by each gas supply means passes through the flow path 25 and is also carried to the mixing space 45, where the plasma On a liquid crystal optical element unit 46 (hereinafter collectively referred to as a base material) 46, which is combined with and mixed with the discharge gas 22 and placed on a moving stage 47, or a transparent base material including a transparent base material on the outermost surface. To be sprayed.
- the gas for forming a transparent conductive layer in contact with the plasma mixed gas is activated by the energy of the plasma and chemically reacts to form a transparent conductive layer on the substrate 46.
- This remote type atmospheric pressure plasma discharge treatment apparatus has a structure in which a mixed gas containing a gas necessary for forming a transparent conductive layer is sandwiched or surrounded by an activated discharge gas.
- the moving stage 47 on which the substrate is placed has a structure capable of reciprocating scanning or continuous scanning. If necessary, the moving stage 47 can be heated similarly to the electrode so as to maintain the temperature of the substrate. It can be exchanged.
- a waste gas exhaust passage 48 for exhausting the gas blown onto the substrate 46 may be provided. Thereby, unnecessary by-products formed in the space can be quickly removed from the discharge space 45 or the base material 46.
- This remote type atmospheric pressure plasma discharge treatment apparatus has a structure in which a discharge gas is turned into plasma and activated, and then merged with a mixed gas containing a gas necessary for forming a transparent conductive layer. As a result, deposition of a film-formed product on the electrode surface can be prevented.
- an antifouling film or the like is attached to the electrode surface to discharge before discharge.
- a structure in which a gas and a gas necessary for forming the transparent conductive layer are mixed can also be used.
- the high frequency power supply is performed in one frequency band.
- a power supply having a different frequency is provided for each electrode. It is also possible to implement by a method of placing.
- the capability of film formation can be improved by arranging a plurality of remote atmospheric pressure plasma discharge treatment apparatuses in the scanning direction of a plurality of stages.
- the inside of the apparatus is kept under a certain gas atmosphere by surrounding the electrodes and the stage so that the outside air does not enter. And a desired high-quality transparent antistatic film can be formed.
- FIG. 5 shows another example of a remote atmospheric pressure plasma discharge treatment apparatus according to the present invention.
- the flow path 24 for supplying the gas 22 including the discharge gas and the flow path 25 for supplying the mixed gas 23 including the gas necessary for forming the transparent conductive layer are provided in parallel.
- the flow path 24 for supplying the gas 22 containing the discharge gas is formed obliquely to increase the mixing efficiency with the mixed gas 23 supplied from the flow path 25. It's okay.
- FIG. 6 is a schematic view showing an example of a direct atmospheric pressure plasma discharge treatment apparatus according to the present invention.
- two electrodes 41 connected to the power source 31 are provided side by side so as to be parallel to the moving stage electrode 47, respectively. At least one of the electrodes 41 and 47 is covered with a dielectric 42, and a high frequency voltage is applied by the electrode 31 to a space 43 formed between the electrodes 41 and 47. .
- the inside of the electrodes 41 and 47 has a hollow structure 44 so that heat generated by the discharge by water, oil or the like can be taken during the discharge and heat exchange can be performed so as to maintain a stable temperature. It has become.
- the gas 22 containing the discharge gas necessary for the discharge passes through the flow path 24 and the mixed gas 23 containing the gas necessary for forming the transparent conductive layer is It passes through the flow path 25 and merges and mixes in the mixing space 45.
- the mixed gas G passes between the electrodes 41 and is supplied to the space 43 between the electrodes 41 and 47.
- a high frequency voltage is applied to the space 43, plasma discharge occurs, and the gas G is turned into plasma.
- the gas for forming the transparent conductive layer is activated and causes a chemical reaction by the plasma gas G, and the transparent conductive material 46 is formed on the substrate (transparent substrate or liquid crystal optical element unit including the transparent substrate on the outermost surface) 46. A layer is formed.
- the stage 47 on which the substrate is mounted has a structure capable of reciprocal scanning or continuous scanning, and if necessary, heat similar to that of the electrode can be maintained so that the temperature of the substrate can be maintained. It can be exchanged.
- a waste gas exhaust passage 48 for exhausting the gas blown onto the substrate 46 can be provided as necessary. Thereby, unnecessary by-products formed in the space can be quickly removed from the discharge space 45 or the substrate 46.
- the high frequency power supply is performed in one frequency band.
- a power supply having a different frequency is provided for each electrode. It is also possible to implement by a method of placing.
- the direct type atmospheric pressure plasma discharge treatment apparatus can be arranged in the scanning direction of a plurality of stages to increase the film forming ability.
- this direct type atmospheric pressure plasma discharge processing apparatus shows a structure that surrounds the entire electrode and stage and prevents outside air from entering, so that the inside of the apparatus has a constant gas. The atmosphere can be maintained, and a desired high-quality transparent antistatic film can be formed.
- a transparent conductive layer was formed on the transparent substrate 5b (glass base material) shown in FIG. 2 (referred to as plasma CVD method DP) by the following atmospheric pressure plasma method (direct atmospheric pressure plasma discharge treatment apparatus).
- SEREN high frequency power supply, 100kHz 5W / cm 2
- the square electrode of the second electrode (41 in Fig. 6) was manufactured by applying ceramic spraying as a dielectric to a 30 mm square hollow titanium nove.
- Electrode width 300mm
- Second electrode slit gap 1. Omm
- Tetraptyltin was vaporized by publishing. Nitrogen gas: 5slm, 80 ° C Discharge gas: Nitrogen, lOOslm
- the liquid crystal display element unit prepared above was placed on the movable base electrode so that the transparent substrate 5b was the uppermost surface, and was continuously scanned under the lOOmmZsec condition to form a transparent conductive layer having a thickness of 12 nm. .
- a transparent conductive layer is formed on the transparent substrate 5b shown in FIG. 2 by the following atmospheric pressure plasma method (remote atmospheric pressure plasma discharge treatment device) using the liquid crystal display element unit prepared in the above liquid crystal display element 1. (Plasma CVD method called PJ).
- SEREN high frequency power supply, 100kHz 5W / cm 2
- the square electrode 41a was manufactured by subjecting a 30mm square hollow titanium pipe to ceramic spraying as a dielectric.
- Electrode width 300mm
- the electrode 41b was manufactured by applying a ceramic spraying force as a dielectric to a 4mm thick titanium plate. Further, as shown in FIG. 4, a 20 mm square hollow titanium pipe was attached as the electrode 41b cooling member.
- Tetramethyltin was vaporized by publishing.
- Ar gas lslm, 20 ° C
- Discharge gas Nitrogen, 200slm
- the liquid crystal display element unit produced above was placed on a movable base with the transparent substrate 5b placed on the top surface, and continuously subjected to a scanning process under the condition of lOmmZsec to form a transparent conductive layer having a thickness of 12 nm.
- a transparent conductive layer was formed on the transparent substrate 5b shown in FIG. 2 by the following sputtering method using the liquid crystal display element unit produced in the liquid crystal display element 1.
- the transparent conductive layer was formed by mounting on the apparatus.
- the magnetic flux density on the target was lOOOGau ss.
- a 10 nm-thick In O—SnO-based transparent conductive layer was formed on the transparent substrate 5b of the liquid crystal display element unit heated to 100 ° C. for 10 minutes and taking 10 minutes.
- a transparent conductive layer was formed on the transparent substrate 5b shown in FIG. 2 by the following coating method.
- a solution obtained by dissolving 80 g of indium nitrate in 700 g of water and a solution obtained by dissolving 12 g of potassium stannate in a potassium hydroxide solution having a concentration of 10% by mass were prepared. While the pH of the system was maintained at 11 in pure water of lOOOOg held in C, it was added for 1 hour. The resulting Sn-doped indium oxide hydrate dispersion liquid power The Sn-doped indium oxide hydrate dispersion is filtered off, washed, and then dispersed again in water to form a metal oxide precursor hydroxide having a solid content of 10% by mass. A dispersion was prepared.
- This metal oxide precursor hydroxide dispersion was spray-dried at a temperature of 100 ° C. to prepare a metal oxide precursor hydroxide powder.
- This metal oxide precursor hydroxide powder was heat-treated at 550 ° C. for 2 hours in a nitrogen gas atmosphere.
- the mixture was dispersed in ethanol so that the concentration became 30% by mass, and the pH was adjusted to 3.5 with an aqueous nitric acid solution, and then the mixture was maintained at 30 ° C with a sand mill.
- a sol was prepared by milling for a period of time.
- ethanol was added to prepare a Sn-doped indium oxide fine particle dispersion A having a concentration of 20% by mass.
- the average particle size measured by SEM was 25 ⁇ m.
- Carbon black fine particles (Mitsubishi Chemical Corporation: MA230) 32g, ethyl alcohol 268 g, Tetrabutoxyzirconium (Nippon Soda Co., Ltd .: ZR-181, ZrO concentration 15 mass%) 4
- a colorant particle dispersion B having a solid content concentration of 9.7 mass% The average particle size of the carbon black fine particles in the colorant particle dispersion B was 40 nm.
- ITO indium oxide
- the transparent conductive layer forming coating solution was applied onto the transparent substrate 5b by a spinner method at 20 Orpm for 90 seconds and dried. The film thickness at this time was 80 nm. Next, a baking process was performed at 180 ° C. for 30 minutes to form a transparent conductive layer.
- the liquid crystal display element After injecting liquid crystal into the liquid crystal layer of each manufactured liquid crystal display element, the liquid crystal display element was operated and checked for malfunction due to short circuit or the like. The case of normal operation was evaluated as ⁇ , and the case of malfunction due to short circuit was evaluated as X.
- the transparent substrate 5b on which the transparent conductive layer of each liquid crystal display element was formed was visually inspected for damage, and it was determined that no damage occurred. This.
- the surface specific resistance ( ⁇ Z port) of each transparent conductive layer is normal temperature and humidity (26 ° C, relative humidity 50%), Hi-Lester IP (MCP—HT450), probe M CP— Measurement was performed using an HTP12 with an applied voltage of 10 V and a measurement time of 10 seconds. [0117] If the surface resistivity value obtained according to the above measurement is less than 1 X 10 5 ( ⁇ Higuchi), it is ⁇ , 1 ⁇ 10 5 ( ⁇ Higuchi) or more, and less than 1 10 8 (07 B) If it is ⁇ ⁇ ⁇ 8 ( ⁇ Higuchi) or more, it was judged as X.
- the substrate 5b with the color filter on which the transparent conductive layer is formed is disassembled and taken out, and the transparent substrate surface opposite to the surface on which the transparent conductive layer is formed is mechanically polished to obtain a color filter.
- the filter was peeled off to make a 0.3 mm thick transparent substrate. About this base material, the haze value and the total light transmittance were compared.
- a haze meter (trade name: Haze Meter NDH2000, manufactured by Nippon Denshoku Co., Ltd.), measurement was performed according to JIS K7105. If the haze value obtained according to the above measurement was 0.3% or less, it was judged as ⁇ , if it was in the range of less than 0.31-1. 0%, ⁇ , and if it was 1.0% or more, it was judged as X.
- the total light transmittance was measured using a spectrophotometer (trade name: UV3100, manufactured by Shimadzu Corporation).
- the total light transmittance of the transparent conductive layer is
- Transmittance of transparent conductive layer C Transmittance AZ Transmittance B X 100
- ⁇ The transparent conductive layer was peeled off by 4 to 9 tape peeling operations.
- the pencil hardness of the antistatic layer surface of each substrate was measured.
- the pencil hardness was measured according to JIS K 5400 using a pencil hardness meter (manufactured by Yoshimitsu Seiki Co., Ltd.).
- Evaluations were evaluated as ⁇ for those of 6H or more, ⁇ for those in the range of 3H to 5H, and X for those of 2H or less.
- the sample of the present invention in which the transparent conductive layer was formed by the atmospheric pressure plasma method using the nitrogen gas defined in the present invention is a component of the liquid crystal display element compared to the comparative example.
- the productivity of the transparent conductive layer is excellent. It can be seen that the film has excellent light transmittance (transparency), conductivity (surface resistivity), uniformity, adhesion to a transparent substrate, and film hardness.
- liquid crystal display elements 5 to 8 were produced.
- the transparent conductive layer forming method used in the production of the liquid crystal display elements 5 to 8 corresponds to the transparent conductive layer forming method used in the production of the liquid crystal display elements 1 to 4 in Example 1, respectively.
- liquid crystal resistance was evaluated according to the following method.
- ⁇ A force that allows generation of very small bubbles in the liquid crystal layer.
- Table 2 shows the results obtained as described above.
- the transparent conductive layer was formed by atmospheric pressure plasma method using nitrogen gas as the thin film forming gas specified in the present invention after filling the liquid crystal by ODF method.
- the sample is highly productive and has no adverse effects on the liquid crystal layer. It can be seen that the formed transparent conductive layer is excellent in light transmittance (total light transmittance), conductivity (surface specific resistance) and adhesion to the transparent substrate.
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- Chemical & Material Sciences (AREA)
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Abstract
Description
Claims
Priority Applications (2)
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US12/375,894 US8045109B2 (en) | 2006-08-04 | 2007-07-17 | Liquid crystal display device operated with an in-plane switching system and manufacturing method thereof |
JP2008527701A JP5062175B2 (ja) | 2006-08-04 | 2007-07-17 | 液晶表示装置の製造方法 |
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JP2006212991 | 2006-08-04 | ||
JP2006-212991 | 2006-08-04 |
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US (1) | US8045109B2 (ja) |
JP (1) | JP5062175B2 (ja) |
TW (1) | TWI427361B (ja) |
WO (1) | WO2008015902A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010204405A (ja) * | 2009-03-04 | 2010-09-16 | Epson Imaging Devices Corp | 横電界方式の液晶表示パネルの製造方法 |
WO2016047599A1 (ja) * | 2014-09-24 | 2016-03-31 | Nok株式会社 | ゴム金属積層ガスケットの製造方法 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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TWI396021B (zh) * | 2008-12-31 | 2013-05-11 | Innolux Corp | 影像顯示系統 |
KR101182229B1 (ko) * | 2010-01-08 | 2012-09-12 | 삼성디스플레이 주식회사 | 액정 표시 패널 및 그의 형성 방법 |
JP5672862B2 (ja) | 2010-08-27 | 2015-02-18 | ソニー株式会社 | 撮像装置、撮像システム及び撮像方法 |
TWI443429B (zh) * | 2011-09-28 | 2014-07-01 | Au Optronics Corp | 製作液晶顯示面板之方法 |
KR102311014B1 (ko) | 2015-01-22 | 2021-10-12 | 삼성디스플레이 주식회사 | 표시 장치의 제조 방법 |
CN108323146B (zh) * | 2018-04-11 | 2019-07-02 | 京东方科技集团股份有限公司 | 玻璃组件及制造方法、玻璃窗 |
CN114203509A (zh) * | 2021-11-29 | 2022-03-18 | 武汉华星光电半导体显示技术有限公司 | 等离子处理设备 |
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JPH09105918A (ja) * | 1995-10-12 | 1997-04-22 | Hitachi Ltd | 液晶表示装置 |
JP2003234028A (ja) * | 2001-12-03 | 2003-08-22 | Konica Corp | 透明導電膜形成方法、該方法により形成された透明導電膜および該透明導電膜を有する物品 |
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TW505801B (en) * | 1995-10-12 | 2002-10-11 | Hitachi Ltd | In-plane field type liquid crystal display device comprising a structure prevented from charging with electricity |
JP3536239B2 (ja) * | 1997-10-24 | 2004-06-07 | 株式会社アドバンスト・ディスプレイ | 液晶表示装置 |
US20030207093A1 (en) | 2001-12-03 | 2003-11-06 | Toshio Tsuji | Transparent conductive layer forming method, transparent conductive layer formed by the method, and material comprising the layer |
JP2005260040A (ja) * | 2004-02-12 | 2005-09-22 | Sony Corp | ドーピング方法、半導体装置の製造方法および電子応用装置の製造方法 |
-
2007
- 2007-07-17 JP JP2008527701A patent/JP5062175B2/ja active Active
- 2007-07-17 US US12/375,894 patent/US8045109B2/en not_active Expired - Fee Related
- 2007-07-17 WO PCT/JP2007/064070 patent/WO2008015902A1/ja active Application Filing
- 2007-07-31 TW TW096128017A patent/TWI427361B/zh not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH09105918A (ja) * | 1995-10-12 | 1997-04-22 | Hitachi Ltd | 液晶表示装置 |
JP2003234028A (ja) * | 2001-12-03 | 2003-08-22 | Konica Corp | 透明導電膜形成方法、該方法により形成された透明導電膜および該透明導電膜を有する物品 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2010204405A (ja) * | 2009-03-04 | 2010-09-16 | Epson Imaging Devices Corp | 横電界方式の液晶表示パネルの製造方法 |
WO2016047599A1 (ja) * | 2014-09-24 | 2016-03-31 | Nok株式会社 | ゴム金属積層ガスケットの製造方法 |
JPWO2016047599A1 (ja) * | 2014-09-24 | 2017-07-06 | Nok株式会社 | ゴム金属積層ガスケットの製造方法 |
Also Published As
Publication number | Publication date |
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JP5062175B2 (ja) | 2012-10-31 |
US20100002176A1 (en) | 2010-01-07 |
JPWO2008015902A1 (ja) | 2009-12-17 |
TWI427361B (zh) | 2014-02-21 |
WO2008015902A8 (ja) | 2008-12-18 |
TW200823532A (en) | 2008-06-01 |
US8045109B2 (en) | 2011-10-25 |
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