WO2010109682A1 - Display device manufacturing method - Google Patents

Display device manufacturing method Download PDF

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Publication number
WO2010109682A1
WO2010109682A1 PCT/JP2009/057275 JP2009057275W WO2010109682A1 WO 2010109682 A1 WO2010109682 A1 WO 2010109682A1 JP 2009057275 W JP2009057275 W JP 2009057275W WO 2010109682 A1 WO2010109682 A1 WO 2010109682A1
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Prior art keywords
display device
sealing material
manufacturing
substrate
substrates
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PCT/JP2009/057275
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French (fr)
Japanese (ja)
Inventor
敏正 江口
丞冶 河村
Original Assignee
次世代モバイル用表示材料技術研究組合
Dic株式会社
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Application filed by 次世代モバイル用表示材料技術研究組合, Dic株式会社 filed Critical 次世代モバイル用表示材料技術研究組合
Priority to CN200980158330.0A priority Critical patent/CN102369563B/en
Publication of WO2010109682A1 publication Critical patent/WO2010109682A1/en

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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
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • 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
    • G02F1/133351—Manufacturing of individual cells out of a plurality of cells, e.g. by dicing
    • 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 
    • G02F1/0102—Constructional details, not otherwise provided for in this subclass
    • G02F1/0107—Gaskets, spacers or sealing of cells; Filling and closing of cells
    • 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
    • G02F1/133305—Flexible substrates, e.g. plastics, organic film
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/842—Containers
    • H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements
    • H10K59/8722—Peripheral sealing arrangements, e.g. adhesives, sealants
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/851—Division of substrate
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/311—Flexible OLED

Definitions

  • the present invention relates to a method for manufacturing a display device suitable for manufacturing, for example, a liquid crystal display panel using a flexible substrate, an organic EL display panel, and the like.
  • a liquid crystal display device such as a liquid crystal display panel has features such as thin and light weight and low power consumption, and is widely used.
  • a seal is used to enclose liquid crystal between a pair of substrates.
  • An adhesive called a material is used.
  • Glass is generally used for substrates of liquid crystal display panels and organic EL display panels, but plastic films are used for the substrates in order to enable curved surface display and to produce further thin and light display panels.
  • the thing is also proposed (refer patent document 1).
  • the substrate is flexible, if a force that can be turned from four corners is applied, local stress is applied to the sealing material and the substrate peels off. There is a problem that the substrate is easily peeled off during the transfer process.
  • the problem to be solved by the present invention is that, for example, when manufacturing a plurality of display devices with a large size substrate, a force to be peeled off due to bending during transportation is applied, and it becomes easy to peel off from the surroundings (especially at the four corners).
  • This is to provide a method for manufacturing a display device in which the substrate is difficult to peel off during the manufacturing process.
  • the present invention is configured as follows.
  • At least one of the substrates used in a set of two is a flexible substrate,
  • a cutting step of individually cutting the plurality of the display devices after the production A method for manufacturing a display device, comprising:
  • the first sealing material has an elastic modulus of 1 ⁇ 10 8 Pa or more in a temperature range of 20 ° C. to 30 ° C. It is a manufacturing method.
  • the invention according to claim 3 is the method for manufacturing the display device according to claim 1 or 2, wherein the display device is a liquid crystal display device.
  • the invention according to claim 4 is the method for manufacturing a display device according to claim 1 or 2, wherein the display device is an organic EL display device.
  • the invention according to claim 5 is the method for manufacturing the display device according to claim 1 or 2, wherein the display device is an electrophoretic display device.
  • the invention according to claim 6 provides the first sealing material on one substrate, After providing the second sealing material on the other substrate, Bonding the two substrates together,
  • the invention according to claim 9 provides the second sealing material,
  • the present invention has the following effects.
  • a plurality of display devices are bonded to each other with a second sealing material having an elastic modulus of 1 ⁇ 10 7 Pa or less in a temperature range of 20 ° C. to 30 ° C.
  • a plurality of display devices are individually cut and manufactured, so that the second force can be applied to the flexible substrate even when force is applied to the flexible substrate from four corners.
  • the substrate is difficult to peel off due to the sealing material.
  • the first sealing material has an elastic modulus of 1 ⁇ 10 8 Pa or more in the temperature range of 20 ° C. to 30 ° C., and the first sealing material is passed through the first sealing material during use of the apparatus. Impurity elution and gas permeation are unlikely to occur, and deterioration of electrical characteristics of a manufactured display device can be suppressed.
  • the display device is a liquid crystal display device, and it is difficult to peel off the substrate during the process of transporting the liquid crystal display device, and to suppress the deterioration of the electrical characteristics of the manufactured display device. it can.
  • the display device is an organic EL display device, and it is difficult for the substrate to be peeled off during a process of transporting the organic EL display device, and the electrical characteristics of the manufactured display device are prevented from deteriorating. be able to.
  • the display device is an electrophoretic display device
  • the substrate is difficult to peel off during the process of transporting the electrophoretic display device, and the electrical characteristics of the manufactured display device are deteriorated. Can be suppressed.
  • the first sealing material when applying the first sealing material, can be easily and reliably performed by using a dispenser that applies while extruding the liquid adhesive contained in the syringe. Can be granted.
  • the sealing material when the second sealing material is applied, the sealing material can be applied easily and surely by using a dispenser that applies while extruding the liquid sealing material contained in the syringe. Can do.
  • the display device 1 in the method of manufacturing the display device 1, at least one of the substrates 2 and 3 used in a pair is a flexible substrate, and the display device 1 is interposed between the pair of substrates 2 and 3. It is a manufacturing method of the display apparatus 1 which has the site
  • a plurality of display devices 1 are bonded so that the outside of the part 4 that is actuated by electricity is surrounded by a first sealing material 5a.
  • a manufacturing process (FIG. 1A) that is manufactured in a set of substrates 2 and 3 bonded with two sealing materials 5b, and a cutting process in which a plurality of display devices 1 are individually cut after manufacturing (FIG. 1A). 1 (b)).
  • the first sealing material 5a may have a low or high elastic modulus at room temperature, but a high elastic modulus at room temperature is difficult to transmit gas such as water vapor and oxygen, and the reliability of the apparatus is high. It is preferable that the elastic modulus is 1 ⁇ 10 8 Pa or higher and the elastic modulus is high in the temperature range of 20 ° C. to 30 ° C.
  • the second sealing material 5b has a modulus of elasticity of 1 ⁇ 10 7 Pa or less in a temperature range of 20 ° C. to 30 ° C., and has a low modulus of elasticity at room temperature. A force to be peeled off by bending inside is likely to be applied, and it is easy to peel off from the surroundings (especially at the four corners), but peeling can be prevented by the second sealing material 5b.
  • FIG. 1A In the manufacturing process (FIG. 1A), as shown in FIG. 2, a portion 4 that is actuated by electricity of an individual display device 1 is provided on one substrate 2, and the outside of the portion 4 that is actuated by this electricity. A first sealing material 5a is applied so as to surround (FIG. 2A).
  • a second sealing material 5b is applied on the other substrate 3 so as to surround the entire outside of the portion 4 of the substrate 2 that is operated by electricity of the plurality of display devices 1 (FIG. 2B). After the sealing material 5b is applied, a step of bonding the two substrates 2 and 3 (FIG. 2C) is included.
  • quality control can be performed as separate components. And rapid production is possible.
  • a portion 4 that is operated by electricity of an individual display device 1 is provided on one identical substrate 2, and the outside of the portion 4 that is operated by this electricity.
  • a first sealing material 5a is applied so as to surround (FIG. 3A). In this way, after applying the first sealing material 5b on the same substrate 2 and further applying the second sealing material 5a, the step of bonding the two substrates 2 and 3 together (FIG. 3 ( b)).
  • the liquid first sealing material 5a and the second sealing material 5b put in a syringe are applied by being discharged from the opening of the dispenser.
  • This dispenser is a dispenser having a small variation in the discharge amount of the opening at each position in the width direction of the opening row, and is applied while extruding the liquid first sealing material 5a and the second sealing material 5b contained in the syringe. By doing, the 1st sealing material 5a and the 2nd sealing material 5b can be provided easily and reliably.
  • the periphery of the first sealing material 5a is cut using a cutting device (dicing saw), and a plurality of display devices 1 are individually manufactured.
  • the use of the device is achieved by surrounding the portion 4 that is electrically operated using the first sealant 5a having a high elastic modulus and having an elastic modulus of 1 ⁇ 10 8 Pa or higher in the temperature range of 20 ° C. to 30 ° C.
  • the elution of impurities into the inside through the first sealing material 5a and the permeation of gases such as water vapor and oxygen are difficult to improve, and the reliability of the display device 1 is improved.
  • the display device 1 is a liquid crystal display device, an organic EL display device, an electrophoretic display device, or the like, and has a portion 4 that is operated by electricity.
  • the liquid crystal display device has features such as power saving, light weight, thinness, and the like.
  • As a general liquid crystal display device an incident side polarizing plate, an output side polarizing plate substrate, and a liquid crystal in a portion that is operated by electricity Those having the following are typical.
  • an organic EL display device has many advantageous characteristics as a display such as a high response speed, a wide viewing angle, good visibility unique to a self-luminous element, and a wide temperature range that can be driven.
  • This organic EL display device has a configuration in which a lower electrode, an organic EL layer of a portion that is operated by electricity, and an upper electrode are laminated from the substrate side in each pixel formed on the substrate, and a current is supplied to the organic EL layer.
  • the light from the organic EL that emits light by flowing is recognized through at least one of the electrodes (translucent conductive film).
  • an electrophoretic display device a microcapsule electrophoretic method has been put to practical use as one of display devices utilizing an electrophoretic phenomenon. In this type of display device, positively and negatively charged white particles and black particles are placed in a microcapsule that is electrically operated and filled with a transparent solvent, and each particle is pulled up to the display surface by applying an external voltage. To form an image.
  • the pair of substrates 2 and 3 is one in which the display device 1 corresponds to a liquid crystal display device, an organic EL display device, an electrophoretic display device, etc., and at least one substrate is a flexible substrate.
  • this flexible substrate for example, there is a plastic film substrate, and as the other substrate, for example, a glass substrate can be used.
  • the first sealing material 5 a is provided so as to enclose the entire exterior 4 of the plurality of display devices 1 that are operated by electricity, and the second sealing material 5 b is operated by the electricity of the plurality of display devices 1. It is given so as to surround the entire outside of the part 4.
  • the first sealing material 5a and the second sealing material 5b are not limited to enclosing the entire exterior, but may be applied so as to enclose a part of the exterior.
  • the first sealing material 5a is made of, for example, a thermosetting resin or a photocurable resin having a thickness of 2 ⁇ m to 10 ⁇ m. It is applied to the substrate to a width of about 1 mm to prevent the substrate gap and the displacement in the substrate surface, and also prevent the liquid crystal from leaking. A liquid crystal injection port (not shown) for filling a liquid crystal in a part of the first sealing material 5a is provided.
  • the base polymer for suitable polymers, such as an acryl-type polymer, a silicone type polymer, polyester, polyurethane, polyamide, polyether, a fluorine type, rubber type, etc. Can be used.
  • the second sealing material 5b for example, a sealing material composition described in JP-A-10-265547 is used.
  • this sealing material composition is blended with (a) an aliphatic cyclic epoxy resin containing an aliphatic ester bond in the molecule together with the epoxy resin in the main agent, On the curing agent side, (b) a trifunctional thiol compound is blended together with the epoxy resin curing agent.
  • the sealing material composition can lower the crosslink density, can give flexibility and flexibility, and provides a cured product that can follow the flexibility of the flexible substrate. Became possible.
  • Example 1 A polyethersulfone plastic film (hereinafter abbreviated as PES film) having a thickness of 0.2 mm and a size of 300 mm ⁇ 300 mm was prepared as a substrate. This PES film showed good flexibility. On this PES film, a silicon dioxide thin film having a thickness of 100 nm was formed by sputtering (FIG. 4A). Next, on the silicon dioxide thin film surface of the PES film, indium tin oxide (hereinafter abbreviated as ITO) having a thickness of 150 nm is formed by a sputtering method using a metal mask with a 10 mm ⁇ 10 mm working area shown in FIG. An electrode pattern having a terminal area was formed as shown in FIGS. 4B and 7.
  • ITO indium tin oxide
  • This PES film with ITO was ultrasonically cleaned in pure water, and after removing pure water with an air knife, the liquid crystal aligning agent was centered on a 10 mm ⁇ 10 mm working area on the electrode pattern using a flexographic printing apparatus. Printing was performed in a range of 30 mm ⁇ 30 mm and baked to form an alignment film having a thickness of 50 nm (FIGS. 4C and 7). The alignment film was subjected to alignment treatment by rubbing, then ultrasonically washed in pure water, and the pure water was removed with an air knife.
  • FIG. 5 Another substrate having an alignment film subjected to alignment treatment was produced (FIG. 5), and a set of two substrates was obtained.
  • a liquid crystal sealing material “PHOTOREC S-WB” manufactured by Sekisui Chemical Co., Ltd. is used as a first sealing material, using a dispenser as shown in FIG. Drawing was performed with a pattern as shown in FIG.
  • a sealing material described in JP-A-10-265547 was drawn as a second sealing material in a pattern shown in FIGS. 9 and 4E using a dispenser.
  • the substrate on which the sealing material was not dispensed was sprayed with spacer beads having a diameter of 5 ⁇ m and heated to perform a fixing process (FIG. 5D). These one set of substrates were aligned so that the rubbing directions were orthogonal and the 10 mm ⁇ 10 mm driving areas were overlapped, and liquid crystal dropping to bonding was performed by the liquid crystal dropping method (FIG. 10A). . Then, it heated at 120 degreeC and the annealing process of the liquid crystal and the post-baking of the sealing material were performed.
  • the periphery of the first sealing material in FIG. 10B was cut to cut the liquid crystal cell into individual pieces. There was no peeling of the substrate during this process. Further, polarizing plates were bonded to both surfaces of the liquid crystal cell in such a manner that their light absorption axes were orthogonal to each other to obtain a liquid crystal display device for evaluation.
  • the voltage holding ratio which is an electrical property of the liquid crystal display device, was measured using a 6254 type liquid crystal physical property evaluation device manufactured by Toyo Corporation, and it was 99.5%. Then, when this liquid crystal display device was put into a constant temperature and humidity chamber controlled at 60 ° C. and 90% RH and treated for 480 hours, the voltage holding ratio was measured again, and it was 98.7%.
  • the elastic modulus in the range of 30 ° C. of a sample obtained by forming the second sealing material described in JP-A-10-265547 into a film and heating it to 120 ° C. and curing was measured by TMA, and it was 1 ⁇ 10 5 Pa. there were.
  • Example 2 Evaluation was conducted in the same manner as in Example 1 except that the liquid crystal seal material “PHOTOREC S-WB” manufactured by Sekisui Chemical Co., Ltd. was not used as the first seal material, and the material described in JP-A-10-265547 was used. A liquid crystal display device was obtained. There was no peeling of the substrate during the process. When the voltage holding ratio was measured in the same manner as in Example 1, it was 89.5%. Then, when this liquid crystal display device was put in a constant temperature and humidity chamber controlled at 60 ° C. and 90% RH and treated for 480 hours, the voltage holding rate was measured again. As a result, the voltage holding rate was as low as 35%.
  • the present invention can be applied to a manufacturing method of a display device suitable for manufacturing a liquid crystal display panel, an organic EL display panel and the like using a flexible substrate, for example, and can be turned from four corners during the manufacturing process. Is added and the substrate is difficult to peel off.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
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  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Manufacturing & Machinery (AREA)
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  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
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Abstract

A method of manufacturing a display device such that a flexible substrate does not peel away even when force is applied to the corners of the substrate in order to flip the substrate during the manufacturing process. Specifically, a method of manufacturing a display device (1) comprising a set of two substrates (2, 3), at least one of which is a flexible substrate, an electrically-operated region (4) located between the set of substrates (2, 3), and a first seal member (5a) surrounding the electrically-operated region (4). The method includes a preparation step for preparing a plurality of display devices (1) between a set of substrates (2, 3) adhered to one another by means of a second seal member (5b) that exhibits an elastic modulus of 1x107 Pa or less at an environmental temperature of 20-30°C, and a cutting step for producing individual display devices (1) by cutting apart the plurality of display devices (1) after production.

Description

表示装置の製造方法Manufacturing method of display device
　この発明は、例えば可撓性基板を用いた液晶表示パネル、有機ＥＬ表示パネルなどの製造に好適な表示装置の製造方法に関する。 The present invention relates to a method for manufacturing a display device suitable for manufacturing, for example, a liquid crystal display panel using a flexible substrate, an organic EL display panel, and the like.
　例えば、液晶表示パネルなどの液晶表示装置は、薄型軽量、低消費電力といった特徴を持ち、広く普及しており、この液晶表示装置では、液晶を２枚１組の基板間に封入するためにシール材と呼ばれる接着剤を用いている。 For example, a liquid crystal display device such as a liquid crystal display panel has features such as thin and light weight and low power consumption, and is widely used. In this liquid crystal display device, a seal is used to enclose liquid crystal between a pair of substrates. An adhesive called a material is used.
　液晶表示パネルや有機ＥＬ表示パネルの基板には、一般的にはガラスが用いられるが、曲面表示を可能にしたり、更なる薄型軽量の表示パネルを製造するために、基板にプラスチックフィルムを用いたものも提案されている（特許文献１参照）。しかし、例えばプラスチックフィルム基板を用いた液晶表示パネルを製造する際には、基板が柔軟であるために、四隅からめくられるような力が加わるとシール材に局所的な応力が加わり基板が剥離しやすく、搬送工程中などに基板が剥離しやすいという問題がある。 Glass is generally used for substrates of liquid crystal display panels and organic EL display panels, but plastic films are used for the substrates in order to enable curved surface display and to produce further thin and light display panels. The thing is also proposed (refer patent document 1). However, for example, when manufacturing a liquid crystal display panel using a plastic film substrate, since the substrate is flexible, if a force that can be turned from four corners is applied, local stress is applied to the sealing material and the substrate peels off. There is a problem that the substrate is easily peeled off during the transfer process.
特開２００４－２７２２２４号公報JP 2004-272224 A
　この発明が解決しようとする課題は、例えば基板が大きいサイズで複数個の表示装置を製造する場合に、搬送中にたわむなどにより引き剥がされる力がかかり、周囲（特に四隅）から剥離しやすくなることを防止し、製造工程中などに、基板が剥離しにくい表示装置の製造方法を提供することである。 The problem to be solved by the present invention is that, for example, when manufacturing a plurality of display devices with a large size substrate, a force to be peeled off due to bending during transportation is applied, and it becomes easy to peel off from the surroundings (especially at the four corners). This is to provide a method for manufacturing a display device in which the substrate is difficult to peel off during the manufacturing process.
　前記課題を解決し、かつ目的を達成するために、この発明は、以下のように構成した。 In order to solve the above-described problems and achieve the object, the present invention is configured as follows.
　請求項１に記載の発明は、２枚１組で用いる基板のうち少なくとも１枚が可撓性の基板であり、
　前記１組の基板の間に電気により作動する部位を有し、この電気により作動する部位を第１のシール材で囲んだ表示装置の製造方法であり、
　複数個の前記表示装置を、それらの外部を温度２０℃から３０℃の範囲における弾性率が１×１０７Ｐａ以下である第２のシール材で接着した前記１組の基板中で作製する作製工程と、
　前記作製した後に前記複数個の前記表示装置を個別に切断して製造する切断工程と、
を含むことを特徴とする表示装置の製造方法である。 In the invention according to claim 1, at least one of the substrates used in a set of two is a flexible substrate,
A method of manufacturing a display device having a portion that is operated by electricity between the set of substrates, wherein the portion that is operated by electricity is surrounded by a first sealant;
Fabrication in which a plurality of the display devices are produced in the set of substrates bonded to each other with a second sealing material having an elastic modulus of 1 × 10 7 Pa or less in a temperature range of 20 ° C. to 30 ° C. Process,
A cutting step of individually cutting the plurality of the display devices after the production,
A method for manufacturing a display device, comprising:
　請求項２に記載の発明は、前記第１のシール材は、温度２０℃から３０℃の範囲における弾性率が１×１０８Ｐａ以上であることを特徴とする請求項１に記載の表示装置の製造方法である。 According to a second aspect of the present invention, in the display device according to the first aspect, the first sealing material has an elastic modulus of 1 × 10 8 Pa or more in a temperature range of 20 ° C. to 30 ° C. It is a manufacturing method.
　請求項３に記載の発明は、前記表示装置が液晶表示装置である請求項１又は請求項２に記載の表示装置の製造方法である。 The invention according to claim 3 is the method for manufacturing the display device according to claim 1 or 2, wherein the display device is a liquid crystal display device.
　請求項４に記載の発明は、前記表示装置が有機ＥＬ表示装置である請求項１又は請求項２に記載の表示装置の製造方法である。 The invention according to claim 4 is the method for manufacturing a display device according to claim 1 or 2, wherein the display device is an organic EL display device.
　請求項５に記載の発明は、前記表示装置が電気泳動式表示装置である請求項１又は請求項２に記載の表示装置の製造方法である。 The invention according to claim 5 is the method for manufacturing the display device according to claim 1 or 2, wherein the display device is an electrophoretic display device.
　請求項６に記載の発明は、１枚の前記基板上に前記第１のシール材を付与し、
　他方の前記基板上に前記第２のシール材を付与した後に、
　２枚の前記基板を貼り合わせる工程を、
含むことを特徴とする請求項１乃至請求項５の何れか１項に記載の表示装置の製造方法である。 The invention according to claim 6 provides the first sealing material on one substrate,
After providing the second sealing material on the other substrate,
Bonding the two substrates together,
The display device manufacturing method according to claim 1, further comprising:
　請求項７に記載の発明は、１枚の同一の前記基板上に前記第１のシール材と前記第２のシール材付与した後に、
　２枚の前記基板を貼り合わせる工程を、
含むことを特徴とする請求項１乃至請求項５の何れか１項に記載の表示装置の製造方法である。 In the invention according to claim 7, after the first sealing material and the second sealing material are applied on the same substrate,
Bonding the two substrates together,
The display device manufacturing method according to claim 1, wherein the display device manufacturing method is included.
　請求項８に記載の発明は、前記第１のシール材を付与する際、
　シリンジに入れた液状の前記を押し出しながら塗布するディスペンサーを用いて行う工程を、
含むことを特徴とする請求項６または請求項７に記載の表示装置の製造方法である。 When the invention according to claim 8 provides the first sealing material,
The step of using a dispenser that applies while extruding the liquid in a syringe,
The display device manufacturing method according to claim 6, further comprising:
　請求項９に記載の発明は、前記第２のシール材を付与する際、
シリンジに入れた液状の前記第２のシール材を押し出しながら塗布するディスペンサーを用いて行う工程を含むことを特徴とする請求項６または請求項７に記載の表示装置の製造方法である。 The invention according to claim 9 provides the second sealing material,
The method for manufacturing a display device according to claim 6 or 7, further comprising a step of using a dispenser that applies the liquid second sealing material placed in a syringe while extruding the second sealing material.
　前記構成により、この発明は、以下のような効果を有する。 With this configuration, the present invention has the following effects.
　請求項１に記載の発明では、複数個の表示装置を、それらの外部を温度２０℃から３０℃の範囲における弾性率が１×１０７Ｐａ以下である第２のシール材で接着した１組の基板中で作製し、作製した後に複数個の表示装置を個別に切断して製造することで、製造工程中に、可撓性の基板に四隅からめくられるような力が加わっても第２のシール材によって基板が剥離しにくい。 In the first aspect of the present invention, a plurality of display devices are bonded to each other with a second sealing material having an elastic modulus of 1 × 10 7 Pa or less in a temperature range of 20 ° C. to 30 ° C. In the manufacturing process, a plurality of display devices are individually cut and manufactured, so that the second force can be applied to the flexible substrate even when force is applied to the flexible substrate from four corners. The substrate is difficult to peel off due to the sealing material.
　請求項２に記載の発明では、第１のシール材が温度２０℃から３０℃の範囲における弾性率が１×１０８Ｐａ以上であり、装置の使用中に第１のシール材を通して内部への不純物の溶出やガスの透過などが起こりにくく、製造される表示装置の電気特性が低下することを抑えることができる。 In the invention according to claim 2, the first sealing material has an elastic modulus of 1 × 10 8 Pa or more in the temperature range of 20 ° C. to 30 ° C., and the first sealing material is passed through the first sealing material during use of the apparatus. Impurity elution and gas permeation are unlikely to occur, and deterioration of electrical characteristics of a manufactured display device can be suppressed.
　請求項３に記載の発明では、表示装置が液晶表示装置であり、液晶表示装置を搬送工程中などに基板が剥離しにくく、また製造される表示装置の電気特性が低下することを抑えることができる。 In the invention described in claim 3, the display device is a liquid crystal display device, and it is difficult to peel off the substrate during the process of transporting the liquid crystal display device, and to suppress the deterioration of the electrical characteristics of the manufactured display device. it can.
　請求項４に記載の発明では、表示装置が有機ＥＬ表示装置であり、有機ＥＬ表示装置を搬送工程中などに基板が剥離しにくく、また製造される表示装置の電気特性が低下することを抑えることができる。 In the invention according to claim 4, the display device is an organic EL display device, and it is difficult for the substrate to be peeled off during a process of transporting the organic EL display device, and the electrical characteristics of the manufactured display device are prevented from deteriorating. be able to.
請求項５に記載の発明では、表示装置が電気泳動式表示装置であり、電気泳動式表示装置を搬送工程中などに基板が剥離しにくく、また製造される表示装置の電気特性が低下することを抑えることができる。 In the invention described in claim 5, the display device is an electrophoretic display device, the substrate is difficult to peel off during the process of transporting the electrophoretic display device, and the electrical characteristics of the manufactured display device are deteriorated. Can be suppressed.
　請求項６に記載の発明では、１枚の基板上に第１のシール材を付与し、他方の基板上に第２のシール材を付与することで、それぞれ別々の部品として品質管理ができ、かつ迅速な製造が可能である。 In the invention according to claim 6, by providing the first sealing material on one substrate and applying the second sealing material on the other substrate, quality control can be performed as separate parts, In addition, rapid production is possible.
　請求項７に記載の発明では、１枚の同一の基板上に第１のシール材と第２のシール材を付与することで、１部品として品質管理ができ、かつ迅速な製造が可能である。 In the invention according to claim 7, by providing the first sealing material and the second sealing material on the same single substrate, quality control can be performed as one component and rapid production is possible. .
　請求項８に記載の発明では、第１のシール材を付与する際、シリンジに入れた液状の接着剤を押し出しながら塗布するディスペンサーを用いて行うことで、第１のシール材を簡単かつ確実に付与することができる。 In the invention according to claim 8, when applying the first sealing material, the first sealing material can be easily and reliably performed by using a dispenser that applies while extruding the liquid adhesive contained in the syringe. Can be granted.
　請求項９に記載の発明では、第２のシール材を付与する際、シリンジに入れた液状のシール材を押し出しながら塗布するディスペンサーを用いて行うことで、シール材を簡単かつ確実に付与することができる。 In the invention described in claim 9, when the second sealing material is applied, the sealing material can be applied easily and surely by using a dispenser that applies while extruding the liquid sealing material contained in the syringe. Can do.
表示装置の製造の工程を示す図である。It is a figure which shows the process of manufacture of a display apparatus. 作製工程を示す図である。It is a figure which shows a preparation process. 他の作製工程を示す図である。It is a figure which shows another preparation process. 実施例の作製工程を示す図である。It is a figure which shows the preparation process of an Example. 実施例の作製工程を示す図である。It is a figure which shows the preparation process of an Example. 電極の形状を示すものである。It shows the shape of the electrode. 基板上の電極の配置を示すものである。It shows the arrangement of the electrodes on the substrate. 基板上の電極と第１のシール材の配置を示すものである。The arrangement of the electrode on the substrate and the first sealing material is shown. 第１のシール材と第２のシール材の配置を示すものである。The arrangement of the first sealing material and the second sealing material is shown. 実施例の切断工程を示す図である。It is a figure which shows the cutting process of an Example.
　以下、この発明の表示装置の製造方法の実施の形態について説明する。この発明の実施の形態は、発明の最も好ましい形態を示すものであり、この発明はこれに限定されない。 Hereinafter, embodiments of a method for manufacturing a display device according to the present invention will be described. The embodiment of the present invention shows the most preferable mode of the present invention, and the present invention is not limited to this.
　図１に示すように、この表示装置１の製造方法は、２枚１組で用いる基板２，３のうち少なくとも１枚が可撓性の基板であり、１組の基板２，３の間に電気により作動する部位４を有する表示装置１の製造方法である。 As shown in FIG. 1, in the method of manufacturing the display device 1, at least one of the substrates 2 and 3 used in a pair is a flexible substrate, and the display device 1 is interposed between the pair of substrates 2 and 3. It is a manufacturing method of the display apparatus 1 which has the site | part 4 act | operated by electricity.
　この表示装置１の製造方法は、複数個の表示装置１を、電気により作動する部位４の外部を第１のシール材５ａで囲むように接着し、それら複数個の表示装置１の外部を第２のシール材５ｂで接着した１組の基板２，３中で作製する作製工程（図１（ａ））と、作製した後に複数個の表示装置１を個別に切断して製造する切断工程（図１（ｂ））と、を含む。 In the manufacturing method of the display device 1, a plurality of display devices 1 are bonded so that the outside of the part 4 that is actuated by electricity is surrounded by a first sealing material 5a. A manufacturing process (FIG. 1A) that is manufactured in a set of substrates 2 and 3 bonded with two sealing materials 5b, and a cutting process in which a plurality of display devices 1 are individually cut after manufacturing (FIG. 1A). 1 (b)).
　第１のシール材５ａは、室温での弾性率が低いものでも、高いものでもよいが、室温での弾性率が高いものは、水蒸気や酸素などのガスを透過しにくく、装置の信頼性が向上し、温度２０℃から３０℃の範囲における弾性率が１×１０８Ｐａ以上であり、弾性率が高いことが好ましい。 The first sealing material 5a may have a low or high elastic modulus at room temperature, but a high elastic modulus at room temperature is difficult to transmit gas such as water vapor and oxygen, and the reliability of the apparatus is high. It is preferable that the elastic modulus is 1 × 10 8 Pa or higher and the elastic modulus is high in the temperature range of 20 ° C. to 30 ° C.
第２のシール材５ｂは、温度２０℃から３０℃の範囲における弾性率が１×１０７Ｐａ以下であり、室温での弾性率が低いものを用いることで、特に基板が大きいサイズでは、搬送中にたわむなどにより引き剥がされる力がかかりやすく、周囲（特に四隅）から剥離しやすくなるが、第２のシール材５ｂによって剥離を防ぐことができる。 The second sealing material 5b has a modulus of elasticity of 1 × 10 7 Pa or less in a temperature range of 20 ° C. to 30 ° C., and has a low modulus of elasticity at room temperature. A force to be peeled off by bending inside is likely to be applied, and it is easy to peel off from the surroundings (especially at the four corners), but peeling can be prevented by the second sealing material 5b.
　作製工程（図１（ａ））では、図２に示すように、１枚の基板２上に個別の表示装置１の電気により作動する部位４を付与し、この電気により作動する部位４の外部を囲むように第１のシール材５ａを付与する（図２（ａ））。 In the manufacturing process (FIG. 1A), as shown in FIG. 2, a portion 4 that is actuated by electricity of an individual display device 1 is provided on one substrate 2, and the outside of the portion 4 that is actuated by this electricity. A first sealing material 5a is applied so as to surround (FIG. 2A).
　他方の基板３上に基板２の複数の表示装置１の電気により作動する部位４の全体の外部を囲むように第２のシール材５ｂを付与し（図２（ｂ））、この第２のシール材５ｂを付与した後に、２枚の基板２，３を貼り合わせる工程（図２（ｃ））を有する。この実施の形態では、１枚の基板２上に第１のシール材５ａを付与し、他方の基板３上に第２のシール材５ｂを付与することで、それぞれ別々の部品として品質管理ができ、かつ迅速な製造が可能である。 A second sealing material 5b is applied on the other substrate 3 so as to surround the entire outside of the portion 4 of the substrate 2 that is operated by electricity of the plurality of display devices 1 (FIG. 2B). After the sealing material 5b is applied, a step of bonding the two substrates 2 and 3 (FIG. 2C) is included. In this embodiment, by providing the first sealing material 5a on one substrate 2 and applying the second sealing material 5b on the other substrate 3, quality control can be performed as separate components. And rapid production is possible.
　また、他の実施の形態として、図３に示すように、１枚の同一の基板２上に個別の表示装置１の電気により作動する部位４を付与し、この電気により作動する部位４の外部を囲むように第１のシール材５ａを付与する（図３（ａ））。このように、１枚の同一の基板２上に第１のシール材５ｂを付与し、さらに第２のシール材５ａを付与した後に、２枚の基板２、３を貼り合わせる工程（図３（ｂ））を有する。 As another embodiment, as shown in FIG. 3, a portion 4 that is operated by electricity of an individual display device 1 is provided on one identical substrate 2, and the outside of the portion 4 that is operated by this electricity. A first sealing material 5a is applied so as to surround (FIG. 3A). In this way, after applying the first sealing material 5b on the same substrate 2 and further applying the second sealing material 5a, the step of bonding the two substrates 2 and 3 together (FIG. 3 ( b)).
　この実施の形態では、１枚の同一の基板２上に電気により作動する部位４、第１のシール材５ａ、第２のシール材５ｂを付与することで、１部品として品質管理ができ、かつ迅速な製造が可能である。 In this embodiment, by providing the part 4 that operates by electricity, the first seal material 5a, and the second seal material 5b on one sheet of the same substrate 2, quality control can be performed as one component, and Rapid production is possible.
　この実施の形態では、ディスペンサーを用いて、シリンジに入れた液状の第１のシール材５ａ、第２のシール材５ｂを、ディスペンサーの開口部からを吐出させて塗布する。このディスペンサーは、開口部列の幅方向、各位置の開口部の吐出量のバラツキが小さいものを用い、シリンジに入れた液状の第１のシール材５ａ、第２のシール材５ｂを押し出しながら塗布することで、第１のシール材５ａ、第２のシール材５ｂを簡単かつ確実に付与することができる。 In this embodiment, using a dispenser, the liquid first sealing material 5a and the second sealing material 5b put in a syringe are applied by being discharged from the opening of the dispenser. This dispenser is a dispenser having a small variation in the discharge amount of the opening at each position in the width direction of the opening row, and is applied while extruding the liquid first sealing material 5a and the second sealing material 5b contained in the syringe. By doing, the 1st sealing material 5a and the 2nd sealing material 5b can be provided easily and reliably.
　切断工程（図１（ｂ））では、切断装置（ダイシングソー）を用いて、第１のシール材５ａの周辺を切断し、複数個の表示装置１を個別に製造する。 In the cutting step (FIG. 1B), the periphery of the first sealing material 5a is cut using a cutting device (dicing saw), and a plurality of display devices 1 are individually manufactured.
　このように、複数個の表示装置１を、それらの外部を温度２０℃から３０℃の範囲における弾性率が１×１０７Ｐａ以下である第２のシール材５ｂで接着した１組の基板２，３中で作製し、作製した後に第１のシール材５ａの周辺を切断し、複数個の表示装置１を製造することで、製造工程中に、可撓性の基板に四隅からめくられるような力が加わっても、弾性率の低い第２のシール材５ｂによって基板が剥離しにくい。 In this way, a set of substrates 2 in which a plurality of display devices 1 are bonded to each other by the second sealing material 5b having an elastic modulus of 1 × 10 7 Pa or less in a temperature range of 20 ° C. to 30 ° C. , 3, and after manufacturing, a plurality of display devices 1 are manufactured by cutting the periphery of the first sealing material 5 a so that the flexible substrate can be turned from four corners during the manufacturing process. Even if a strong force is applied, the substrate is difficult to peel off by the second sealing material 5b having a low elastic modulus.
　しかも、温度２０℃から３０℃の範囲における弾性率が１×１０８Ｐａ以上であり、弾性率の高い第１のシール材５ａを用いて電気により作動する部位４を囲むことで、装置の使用中に第１のシール材５ａを通して内部への不純物の溶出や水蒸気や酸素などのガスを透過しにくく、表示装置１の信頼性が向上する。 In addition, the use of the device is achieved by surrounding the portion 4 that is electrically operated using the first sealant 5a having a high elastic modulus and having an elastic modulus of 1 × 10 8 Pa or higher in the temperature range of 20 ° C. to 30 ° C. The elution of impurities into the inside through the first sealing material 5a and the permeation of gases such as water vapor and oxygen are difficult to improve, and the reliability of the display device 1 is improved.
　この表示装置１は、液晶表示装置、有機ＥＬ表示装置、電気泳動式表示装置などであり、電気により作動する部位４を有する。液晶表示装置は、その省電力、軽量、薄型等といった特徴を有し、一般的な液晶表示装置としては、入射側の偏光板と出射側の偏光板の基板と、電気により作動する部位の液晶とを有するものが代表的である。有機ＥＬ表示装置は、液晶表示装置と比べ、高速応答速度、広視野角、自発光素子特有の視認性の良さ、また駆動可能な温度範囲が広いなどのディスプレイとして有利な特性を数多く有する。この有機ＥＬ表示装置は、基板上に形成された各画素内に、基板側から下部電極、電気により作動する部位の有機ＥＬ層、および上部電極が積層された構成を備え、有機ＥＬ層に電流を流すことによって発光する有機ＥＬからの光を、少なくとも電極のうち一方の電極（透光性の導電膜）を通して認識するようになっている。電気泳動式表示装置は、電気泳動現象を利用した表示装置の一つとして、マイクロカプセル型電気泳動方式が実用化されている。この方式の表示装置は、透明溶媒が満たされた電気により作動する部位のマイクロカプセル中に正、負に帯電した白い粒子と黒い粒子を入れ、外部電圧の印加によってそれぞれの粒子を表示面に引き上げて画像を形成するものである。 The display device 1 is a liquid crystal display device, an organic EL display device, an electrophoretic display device, or the like, and has a portion 4 that is operated by electricity. The liquid crystal display device has features such as power saving, light weight, thinness, and the like. As a general liquid crystal display device, an incident side polarizing plate, an output side polarizing plate substrate, and a liquid crystal in a portion that is operated by electricity Those having the following are typical. Compared with a liquid crystal display device, an organic EL display device has many advantageous characteristics as a display such as a high response speed, a wide viewing angle, good visibility unique to a self-luminous element, and a wide temperature range that can be driven. This organic EL display device has a configuration in which a lower electrode, an organic EL layer of a portion that is operated by electricity, and an upper electrode are laminated from the substrate side in each pixel formed on the substrate, and a current is supplied to the organic EL layer. The light from the organic EL that emits light by flowing is recognized through at least one of the electrodes (translucent conductive film). As an electrophoretic display device, a microcapsule electrophoretic method has been put to practical use as one of display devices utilizing an electrophoretic phenomenon. In this type of display device, positively and negatively charged white particles and black particles are placed in a microcapsule that is electrically operated and filled with a transparent solvent, and each particle is pulled up to the display surface by applying an external voltage. To form an image.
　２枚１組の基板２，３は、表示装置１が液晶表示装置、有機ＥＬ表示装置、電気泳動式表示装置などに応じたものであり、少なくとも１枚が可撓性の基板である。この可撓性の基板としては、例えばプラスチックフィルム基板などがあり、他の基板としては、例えばガラス基板などを用いることができる。 The pair of substrates 2 and 3 is one in which the display device 1 corresponds to a liquid crystal display device, an organic EL display device, an electrophoretic display device, etc., and at least one substrate is a flexible substrate. As this flexible substrate, for example, there is a plastic film substrate, and as the other substrate, for example, a glass substrate can be used.
　第１のシール材５ａは複数個の表示装置１の電気により作動する部位４をそれぞれその外部全体を囲むように付与し、第２のシール材５ｂは複数個の表示装置１の電気により作動する部位４の外部全体を囲むように付与している。この第１のシール材５ａ及び第２のシール材５ｂは、それぞれ外部全体を囲むものに限らず、外部の一部を囲むように付与してもよい。 The first sealing material 5 a is provided so as to enclose the entire exterior 4 of the plurality of display devices 1 that are operated by electricity, and the second sealing material 5 b is operated by the electricity of the plurality of display devices 1. It is given so as to surround the entire outside of the part 4. The first sealing material 5a and the second sealing material 5b are not limited to enclosing the entire exterior, but may be applied so as to enclose a part of the exterior.
　第１のシール材５ａは、例えば厚さ２μｍ～１０μｍの熱硬化樹脂、光硬化性樹脂などにより構成される。基板に幅約１ｍｍに塗布され、基板ギャップおよび基板面内のずれを防止するとともに、液晶の漏洩を防止する。第１のシール材５ａの一部に液晶を充填するための液晶注入口（図示せず）が設けられる。第１のシール材５ａとしては、特に限定されないが、例えば、アクリル系ポリマー、シリコーン系ポリマー、ポリエステルやポリウレタン、ポリアミド、ポリエーテル、フッ素系、ゴム系等、適宜なポリマーをベースポリマーとしたものを用いることができる。特に、アクリル系粘着剤の如く、透明性、濡れ性、凝集性、耐熱性、耐湿性等に優れるものが好ましい。 The first sealing material 5a is made of, for example, a thermosetting resin or a photocurable resin having a thickness of 2 μm to 10 μm. It is applied to the substrate to a width of about 1 mm to prevent the substrate gap and the displacement in the substrate surface, and also prevent the liquid crystal from leaking. A liquid crystal injection port (not shown) for filling a liquid crystal in a part of the first sealing material 5a is provided. Although it does not specifically limit as the 1st sealing material 5a, For example, what used the base polymer for suitable polymers, such as an acryl-type polymer, a silicone type polymer, polyester, polyurethane, polyamide, polyether, a fluorine type, rubber type, etc. Can be used. In particular, a material excellent in transparency, wettability, cohesiveness, heat resistance, moisture resistance and the like, such as an acrylic pressure-sensitive adhesive, is preferable.
　第２のシール材５ｂは、例えば特開平１０－２６５５４７号公報に記載のシール材組成物が用いられる。このシール材組成物は、シール材が主剤、硬化剤に分かれる二液タイプの構成の場合、主剤にエポキシ樹脂と共に（ａ）分子内に脂肪族エステル結合を含む脂肪族環状エポキシ樹脂を配合し、硬化剤側にはエポキシ樹脂硬化剤と共に（ｂ）３官能チオール化合物を配合する。この結果、シール材組成物は、架橋密度を下げることが可能となり、柔軟性、可とう性を付与することが可能となり、可撓性の基板の持つフレキシビリティに追随可能な硬化物を与えることが可能となった。 As the second sealing material 5b, for example, a sealing material composition described in JP-A-10-265547 is used. In the case of a two-pack type composition in which the sealing material is divided into a main agent and a curing agent, this sealing material composition is blended with (a) an aliphatic cyclic epoxy resin containing an aliphatic ester bond in the molecule together with the epoxy resin in the main agent, On the curing agent side, (b) a trifunctional thiol compound is blended together with the epoxy resin curing agent. As a result, the sealing material composition can lower the crosslink density, can give flexibility and flexibility, and provides a cured product that can follow the flexibility of the flexible substrate. Became possible.
　次に、実施例を、図４乃至図９に基づき説明する。
（実施例１）
　厚さ０．２ｍｍ、大きさ３００ｍｍ×３００ｍｍのポリエーテルスルホン製プラスチックフィルム（以下ＰＥＳフィルムと略す）を基板として用意した。このＰＥＳフィルムは良好な可撓性を示した。このＰＥＳフィルム上に、スパッタリング法により厚さ１００ｎｍの二酸化珪素薄膜を成膜した（図４（ａ））。
次に、このＰＥＳフィルムの二酸化珪素薄膜面上に、厚さ１５０ｎｍの酸化インジウム錫（以下、ＩＴＯと略す）を、メタルマスクを用いたスパッタリング法により、図６に示す１０ｍｍ×１０ｍｍの作動エリアと端子エリアを有する電極パターンを、図４（ｂ）及び図７に示す配置のように成膜した。 Next, an embodiment will be described with reference to FIGS.
Example 1
A polyethersulfone plastic film (hereinafter abbreviated as PES film) having a thickness of 0.2 mm and a size of 300 mm × 300 mm was prepared as a substrate. This PES film showed good flexibility. On this PES film, a silicon dioxide thin film having a thickness of 100 nm was formed by sputtering (FIG. 4A).
Next, on the silicon dioxide thin film surface of the PES film, indium tin oxide (hereinafter abbreviated as ITO) having a thickness of 150 nm is formed by a sputtering method using a metal mask with a 10 mm × 10 mm working area shown in FIG. An electrode pattern having a terminal area was formed as shown in FIGS. 4B and 7.
　このＩＴＯ付きＰＥＳフィルムを純水中で超音波洗浄し、エアナイフで純水を除去した後、液晶配向剤を、フレキソ印刷装置を用いて前記電極パターン上の１０ｍｍ×１０ｍｍの作動エリアを中心とした３０ｍｍ×３０ｍｍの範囲に印刷して焼成し、厚さ５０ｎｍの配向膜を成膜した（図４（ｃ）及び図７）。配向膜をラビングにより配向処理した後、純水中で超音波洗浄し、エアナイフで純水を除去した。 This PES film with ITO was ultrasonically cleaned in pure water, and after removing pure water with an air knife, the liquid crystal aligning agent was centered on a 10 mm × 10 mm working area on the electrode pattern using a flexographic printing apparatus. Printing was performed in a range of 30 mm × 30 mm and baked to form an alignment film having a thickness of 50 nm (FIGS. 4C and 7). The alignment film was subjected to alignment treatment by rubbing, then ultrasonically washed in pure water, and the pure water was removed with an air knife.
　同様にして配向処理した配向膜を有する基板をもう１枚作製し（図５）、２枚１組の基板とした。 Similarly, another substrate having an alignment film subjected to alignment treatment was produced (FIG. 5), and a set of two substrates was obtained.
　このうちの１枚の基板上に、例えば図４に示す基板上に、第１のシール材として積水化学株式会社製液晶シール材「フォトレックＳ－ＷＢ」を、ディスペンサーを用いて、図８及び図４（ｄ）に示すようなパターンで描画した。この基板に、第２のシール材として特開平１０－２６５５４７号公報に記載されるシール材を、ディスペンサーを用いて、図９及び図４（ｅ）に示すパターンで描画した。 On one of these substrates, for example, on the substrate shown in FIG. 4, a liquid crystal sealing material “PHOTOREC S-WB” manufactured by Sekisui Chemical Co., Ltd. is used as a first sealing material, using a dispenser as shown in FIG. Drawing was performed with a pattern as shown in FIG. On this substrate, a sealing material described in JP-A-10-265547 was drawn as a second sealing material in a pattern shown in FIGS. 9 and 4E using a dispenser.
　シール材をディスペンスしていない基板には、固着性を有する直径５μｍのスペーサービーズを散布して加熱し、固着処理を行った（図５（ｄ））。これらの１組の基板を、ラビング方向が直交し、１０ｍｍ×１０ｍｍの駆動エリアが重なるように位置合わせを行い、液晶滴下方式により液晶の滴下から貼り合せまでを行った（図１０（ａ））。続いて１２０℃に加熱して液晶のアニール処理およびシール材のポストベークを行った。 The substrate on which the sealing material was not dispensed was sprayed with spacer beads having a diameter of 5 μm and heated to perform a fixing process (FIG. 5D). These one set of substrates were aligned so that the rubbing directions were orthogonal and the 10 mm × 10 mm driving areas were overlapped, and liquid crystal dropping to bonding was performed by the liquid crystal dropping method (FIG. 10A). . Then, it heated at 120 degreeC and the annealing process of the liquid crystal and the post-baking of the sealing material were performed.
　次に、切断装置（ダイシングソー）を用いて、図１０（ｂ）の第１のシール材の周辺を切断し、液晶セルを個片に切断した。この工程中での基板の剥離はなかった。更に液晶セルの両面に偏光板をその光吸収軸が直交する配置で貼り合わせ、評価用の液晶表示装置を得た。 Next, using a cutting device (dicing saw), the periphery of the first sealing material in FIG. 10B was cut to cut the liquid crystal cell into individual pieces. There was no peeling of the substrate during this process. Further, polarizing plates were bonded to both surfaces of the liquid crystal cell in such a manner that their light absorption axes were orthogonal to each other to obtain a liquid crystal display device for evaluation.
　液晶表示装置の電気特性である電圧保持率を、株式会社東陽テクニカ製６２５４型液晶物性評価装置を用いて測定したところ、９９．５％であった。その後、この液晶表示装置を６０℃９０％ＲＨに制御した恒温恒湿槽に入れて４８０時間処理した後に再度電圧保持率の測定を行ったところ、９８．７％であった。特開平１０－２６５５４７号公報に記載される第２のシール材をフィルム状にして１２０℃に加熱し硬化した試料の３０℃の範囲における弾性率をＴＭＡにより測定したところ、１×１０５Ｐａであった。
（実施例２）
　第１のシール材として積水化学株式会社製液晶シール材「フォトレックＳ－ＷＢ」を用いず、特開平１０－２６５５４７号公報に記載の材料を用いた以外は実施例１と同様にして、評価用の液晶表示装置を得た。工程中での基板の剥離はなかった。実施例１と同様にして電圧保持率を測定したところ、８９．５％であった。その後、この液晶表示装置を６０℃９０％ＲＨに制御した恒温恒湿槽に入れて４８０時間処理した後に再度電圧保持率の測定を行ったところ、電圧保持率は３５％と低かった。
（比較例１）
　第２のシール材を描画しない以外は実施例と同様にして、液晶のアニール処理およびシール材のポストベークまでを行った。次に切断を行ったところ、切断前の搬送工程において基板が剥離してしまう不良が発生した。 The voltage holding ratio, which is an electrical property of the liquid crystal display device, was measured using a 6254 type liquid crystal physical property evaluation device manufactured by Toyo Corporation, and it was 99.5%. Then, when this liquid crystal display device was put into a constant temperature and humidity chamber controlled at 60 ° C. and 90% RH and treated for 480 hours, the voltage holding ratio was measured again, and it was 98.7%. The elastic modulus in the range of 30 ° C. of a sample obtained by forming the second sealing material described in JP-A-10-265547 into a film and heating it to 120 ° C. and curing was measured by TMA, and it was 1 × 10 5 Pa. there were.
(Example 2)
Evaluation was conducted in the same manner as in Example 1 except that the liquid crystal seal material “PHOTOREC S-WB” manufactured by Sekisui Chemical Co., Ltd. was not used as the first seal material, and the material described in JP-A-10-265547 was used. A liquid crystal display device was obtained. There was no peeling of the substrate during the process. When the voltage holding ratio was measured in the same manner as in Example 1, it was 89.5%. Then, when this liquid crystal display device was put in a constant temperature and humidity chamber controlled at 60 ° C. and 90% RH and treated for 480 hours, the voltage holding rate was measured again. As a result, the voltage holding rate was as low as 35%.
(Comparative Example 1)
A liquid crystal annealing process and post-baking of the sealing material were performed in the same manner as in the example except that the second sealing material was not drawn. Next, when cutting was performed, a defect occurred in which the substrate peeled off in the transport process before cutting.
　この発明は、例えば可撓性基板を用いた液晶表示パネル、有機ＥＬ表示パネルなどの製造に好適な表示装置の製造方法に適用可能であり、製造工程中などに、四隅からめくられるような力が加わって基盤が剥離しにくい。 The present invention can be applied to a manufacturing method of a display device suitable for manufacturing a liquid crystal display panel, an organic EL display panel and the like using a flexible substrate, for example, and can be turned from four corners during the manufacturing process. Is added and the substrate is difficult to peel off.
１　　　表示装置
２，３　基板
４　　　電気により作動する部位
５ａ　　第１のシール材
５ｂ　　第２のシール材
１０　　接着剤 DESCRIPTION OF SYMBOLS 1 Display apparatus 2, 3 Board | substrate 4 The part 5a which act | operates by electricity 5a 1st sealing material 5b 2nd sealing material 10 Adhesive

Claims (9)

  1. 　２枚１組で用いる基板のうち少なくとも１枚が可撓性の基板であり、
    　前記１組の基板の間に電気により作動する部位を有し、この電気により作動する部位を第１のシール材で囲んだ表示装置の製造方法であり、
    　複数個の前記表示装置を、それらの外部を温度２０℃から３０℃の範囲における弾性率が１×１０７Ｐａ以下である第２のシール材で接着した前記１組の基板中で作製する作製工程と、
    　前記作製した後に前記複数個の前記表示装置を個別に切断して製造する切断工程と、
    を含むことを特徴とする表示装置の製造方法。     At least one of the substrates used in a set of two is a flexible substrate,
    A method of manufacturing a display device having a portion that is operated by electricity between the set of substrates, wherein the portion that is operated by electricity is surrounded by a first sealant;
    Fabrication in which a plurality of the display devices are produced in the set of substrates bonded to each other with a second sealing material having an elastic modulus of 1 × 10 7 Pa or less in a temperature range of 20 ° C. to 30 ° C. Process,
    A cutting step of individually cutting the plurality of the display devices after the production,
    A method for manufacturing a display device, comprising:
  2. 　前記第１のシール材は、温度２０℃から３０℃の範囲における弾性率が１×１０８Ｐａ以上であることを特徴とする請求項１に記載の表示装置の製造方法。 2. The method for manufacturing a display device according to claim 1, wherein the first sealing material has an elastic modulus of 1 × 10 8 Pa or more in a temperature range of 20 ° C. to 30 ° C. 3.
  3. 　前記表示装置が液晶表示装置である請求項１又は請求項２に記載の表示装置の製造方法。 The method for manufacturing a display device according to claim 1, wherein the display device is a liquid crystal display device.
  4. 　前記表示装置が有機ＥＬ表示装置である請求項１又は請求項２に記載の表示装置の製造方法。 The method for manufacturing a display device according to claim 1, wherein the display device is an organic EL display device.
  5. 　前記表示装置が電気泳動式表示装置である請求項１又は請求項２に記載の表示装置の製造方法。 The method for manufacturing a display device according to claim 1 or 2, wherein the display device is an electrophoretic display device.
  6. 　１枚の前記基板上に前記第１のシール材を付与し、
    　他方の前記基板上に前記第２のシール材を付与した後に、
    　２枚の前記基板を貼り合わせる工程を、
    含むことを特徴とする請求項１乃至請求項５の何れか１項に記載の表示装置の製造方法。     Applying the first sealing material on one substrate;
    After providing the second sealing material on the other substrate,
    Bonding the two substrates together,
    6. The method for manufacturing a display device according to claim 1, further comprising:
  7. 　１枚の同一の前記基板上に前記第１のシール材と前記第２のシール材を付与した後に、
    　２枚の前記基板を貼り合わせる工程を、
    含むことを特徴とする請求項１乃至請求項５の何れか１項に記載の表示装置の製造方法。     After applying the first sealing material and the second sealing material on one and the same substrate,
    Bonding the two substrates together,
    6. The method for manufacturing a display device according to claim 1, further comprising:
  8. 　前記第１のシール材を付与する際、
    　シリンジに入れた液状の第１のシール材を押し出しながら塗布するディスペンサーを用いて行う工程を、
    含むことを特徴とする請求項６または請求項７に記載の表示装置の製造方法。     When applying the first sealing material,
    A step of performing using a dispenser that is applied while extruding the liquid first sealing material placed in the syringe,
    The method for manufacturing a display device according to claim 6, further comprising:
  9. 　前記第２のシール材を付与する際、
    シリンジに入れた液状の前記第２のシール材を押し出しながら塗布するディスペンサーを用いて行う工程を含むことを特徴とする請求項６または請求項７に記載の表示装置の製造方法。     When applying the second sealing material,
    The method for manufacturing a display device according to claim 6, further comprising a step of using a dispenser that applies the liquid second sealing material placed in a syringe while extruding the second sealing material.
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