WO2015043165A1 - 一种柔性基板及其制作方法、以及显示装置 - Google Patents

一种柔性基板及其制作方法、以及显示装置 Download PDF

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Publication number
WO2015043165A1
WO2015043165A1 PCT/CN2014/075661 CN2014075661W WO2015043165A1 WO 2015043165 A1 WO2015043165 A1 WO 2015043165A1 CN 2014075661 W CN2014075661 W CN 2014075661W WO 2015043165 A1 WO2015043165 A1 WO 2015043165A1
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Prior art keywords
flexible
flexible substrate
substrate
fibers
layer
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PCT/CN2014/075661
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English (en)
French (fr)
Inventor
孙韬
谢明哲
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京东方科技集团股份有限公司
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Priority to US14/403,402 priority Critical patent/US20150314576A1/en
Publication of WO2015043165A1 publication Critical patent/WO2015043165A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
    • H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
    • H01L21/76—Making of isolation regions between components
    • H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
    • H01L21/7624—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/007—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/12—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by the relative arrangement of fibres or filaments of different layers, e.g. the fibres or filaments being parallel or perpendicular to each other
    • 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
    • H10K50/844—Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/42—Alternating layers, e.g. ABAB(C), AABBAABB(C)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/202—LCD, i.e. liquid crystal displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/206—Organic displays, e.g. OLED
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31721—Of polyimide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31786—Of polyester [e.g., alkyd, etc.]

Definitions

  • the present invention relates to the field of flexible display technologies, and in particular, to a flexible substrate and a method of fabricating the same, and a display device using the same.
  • next-generation OLED Organic Light Emitting Device
  • OLED Organic Light Emitting Device
  • the conventional display is a flat panel display and cannot be bent at will.
  • the future trend is to present a large amount of information on the flexible body, that is, display on a flexible display, that is, to achieve flexible display.
  • the official definition of a flexible display is that its display and module can be mechanically bent in any step of substrate packaging, production, storage, use, operation, process connection, handling, transportation, etc. (from IEC).
  • the key to achieving a flexible display for the TC110 WG8 X is to provide a flexible display.
  • the key to providing a flexible display is to use appropriate substrate technology, array technology and packaging technology.
  • displays that can realize flexible display include LCD, OLED, EPD (electronic paper display), PDLC (polymer dispersed liquid crystal), and ChLC (cholesteric liquid crystal) mode displays, and the substrates used in the display are mainly ultra-thin.
  • the three types of substrates, such as glass, metal foil and plastic, and the array technology used in the display, in addition to the traditional amorphous silicon technology, include low-temperature polysilicon (LTPS) and oxide (Oxide) which have been gradually developed in recent years. , and organic thin film transistor (OTFT) technology.
  • LTPS low-temperature polysilicon
  • Oxide oxide
  • OFT organic thin film transistor
  • OLED mode displays since OLED devices are very sensitive to moisture and oxygen, and performance degradation is likely to occur, OLED devices must be packaged, primarily with substrate and thin film packages (TFE).
  • the ultra-thin glass substrate has good barrier properties against moisture and oxygen, and its transparency is good, but it is sensitive to crack defects, and its impact resistance and bending property are poor, and it is difficult to achieve mil to roll. Process, and the development of ultra-thin flexible glass is difficult to achieve.
  • the metal foil substrate has the function of blocking water vapor and oxygen, and its high temperature resistance, low cost, self-extension, and easy roll-to-roll process, however, the surface of the metal foil is rough (roughness is about ⁇ . ⁇ ), even after After the polishing process, it is still necessary to plate the planarization layer, which increases the thickness of the substrate, resulting in an increase in the thickness of the display.
  • the plastic substrate is more flexible, lighter in weight and more resistant to impact.
  • the plastic substrate is not resistant to high temperatures, and the TFT process must be completed at a very low temperature, which increases the defects in the film, but at high temperatures, the plastic The deformation amount is large. At a temperature higher than the glass transition temperature, the deformation amount of the plastic is seriously increased, and the lattice matching between the plastic substrate and the film is not as good as that of the glass substrate, so that the film is easily peeled off.
  • the technical problem to be solved by the present invention is to provide a flexible substrate which is not easily deformed, at the same time, which combines strength and softness, a manufacturing method thereof, and a flexible substrate Display device.
  • an aspect of the present invention provides a flexible substrate comprising: a substrate having a plurality of flexible layers disposed thereon, and a fiber layer disposed between adjacent two flexible layers.
  • the flexible layer is made of a resinous material.
  • the resinous material is a resin plastic.
  • the resin plastic is made of polyimide, polyethylene naphthalate or polyethylene terephthalate.
  • the fiber layup is formed by a staggered distribution of fibers.
  • the fibers are staggered in an orthogonal manner of (0°, 90°) or ( 45 °, -45°).
  • the fibers comprise glass fibers and carbon fibers.
  • the fibers are in the form of a round bundle.
  • the present invention further provides a method for fabricating a flexible substrate, comprising: step S1, covering a substrate with a flexible layer made of a resin material; and step S2, pre-curing the flexible layer; Step S3, the flexible layer is covered with a fiber layer, the fiber layer is formed by staggered distribution of fibers; and step S4, the fiber layer is further covered with a flexible layer made of a resin material; S5, repeat steps S2 to S4 multiple times.
  • the method further includes: Step S6: After completing the step 5, vacuuming the flexible substrate and performing curing and heat preservation treatment.
  • the curing time of the pre-curing in the step S2 is from 80 minutes to 150 minutes, and the curing temperature is from 80 °C to 200 °C.
  • the curing time in the step S6 is from 60 minutes to 120 minutes.
  • the present invention also provides a display device comprising the above flexible substrate.
  • the manufacturing method thereof, and the display device, the flexible substrate and the fiber layer are jointly formed into a flexible substrate, which can effectively prevent high-temperature deformation of the flexible layer, can reduce stress and maximize the attachment of the film on the substrate. Focus on and improve the bending and compressive strength of the substrate.
  • FIG. 1 is a schematic structural view of a flexible substrate according to an embodiment of the present invention.
  • FIG. 2 is a schematic view showing an orthogonal distribution of fibers in a flexible substrate according to an embodiment of the present invention.
  • Fig. 3 is a schematic view showing another orthogonal distribution of fibers in a flexible substrate according to an embodiment of the present invention.
  • FIG. 4 is a flow chart of a method of fabricating a flexible substrate according to an embodiment of the present invention.
  • FIG. 1 is a schematic structural view of a flexible substrate according to an embodiment of the present invention.
  • the embodiment provides a flexible substrate, comprising: a substrate 1 , wherein the substrate is provided with a plurality of flexible layers 2 , and a fiber layer 3 is disposed between two adjacent flexible layers 2 .
  • the flexible layer 2 is made of a resinous material.
  • the fiber layer 3 is added between the two flexible layers 2, which can effectively prevent high-temperature deformation of the flexible layer, can reduce stress and maximize the adhesion of the film on the substrate, and improve the bending of the substrate. And compression strength.
  • the resinous material is preferably a resin plastic.
  • the resin plastic is preferably made of, for example, polyimide, polyethylene naphthalate or polyethylene terephthalate.
  • the thickness of the flexible layer is on the order of tens of microns.
  • the fibers in the fiber layer are (0°, 90°) or (45°, -45°).
  • the orthogonal mode is staggered so that the bending and compression performance in different directions can be maximized compared to other interleaving methods.
  • the staggered distribution of the fibers according to the orthogonal manner of (0°, 90°) specifically means: a part of the fibers are distributed in a direction parallel to the X coordinate axis, and another part of the fibers are distributed in a direction parallel to the Y coordinate axis, thereby The two parts of the fibers are staggered in an orthogonal manner of 90°.
  • the staggered distribution of fibers in an orthogonal manner of (45°, -45°) specifically means that a part of the fibers are distributed in a direction at an angle of 45° with respect to the X coordinate axis, and another portion of the fibers are in accordance with the Y coordinate.
  • the axes are distributed at an angle of 45° so that the two fibers are staggered in a 90° orthogonal manner.
  • the fibers may preferably be, for example, glass fibers or carbon fibers.
  • the fibers are in the form of a round bundle.
  • the surface area of the fiber structure in the case of a round bundle is in contact with the flexible layer (for example, a resin material), so that the bonding strength between the fiber and the flexible layer is high, and the flexible layer is After curing, the high temperature deformation of the flexible layer is limited to a certain extent in the fiber direction, and the high temperature deformation amount of the flexible layer is reduced. Thereby, the adhesion of the film grown on the substrate is improved, and the possibility of film peeling is reduced.
  • the flexible substrate provided by the invention is formed by a flexible layer and a fiber layer, which can effectively prevent high-temperature deformation of the flexible layer, can reduce stress and maximize the adhesion of the film on the substrate, and improve the bending and compressive strength of the substrate.
  • FIG. 4 is a flow chart of a method of fabricating a flexible substrate according to an embodiment of the present invention.
  • the present invention also provides a method for fabricating the above flexible substrate, which Includes the following steps.
  • Step SI covering the substrate with a flexible layer made of a resinous material.
  • the resin material is preferably a resin plastic
  • the thickness of the resin plastic is on the order of several tens of micrometers
  • the resin plastic is preferably made of polyimide (PI), polyethylene naphthalate (PEN), poly pair. Made of ethylene phthalate (PET).
  • step S2 the flexible layer is pre-cured to have a certain shape and strength on the substrate.
  • the pre-curing curing time is from 80 minutes to 150 minutes, and the curing temperature is from 80 ° C to 200. C.
  • step S3 the flexible layer is covered with a fiber layer, and the fiber layer is formed by staggered distribution of fibers.
  • the fibers in the fiber layup are staggered in an orthogonal manner of (0°, 90°) or (45°, -45°), so that different directions can be maximized compared with other interlacing methods. Bending and compression properties.
  • Adding a fiber layer between two adjacent flexible layers can effectively prevent high-temperature deformation of the flexible layer, reduce stress and maximize the adhesion of the film on the substrate, thereby improving the bending and compressive strength of the substrate.
  • Step S4 continuing to cover the fiber layer with a flexible layer made of a resin material.
  • step S5 steps S2 to S4 are repeated multiple times.
  • the S2 ⁇ S4 operation is usually repeated 2 to 4 times to increase the strength of the flexible substrate.
  • the number of times the S2-S4 operation is repeated can be determined according to actual needs.
  • Step S6 after completing step 5, vacuuming the flexible substrate and performing curing and temperature-protecting treatment.
  • the curing time is 60 minutes to 120 minutes.
  • Vacuuming the flexible substrate and performing curing and heat treatment can discharge the volatile components, solidify and compact the multilayer composite material, and remove holes in the flexible layer (for example, resin materials), thereby improving the flexible substrate.
  • Mechanical behavior In the method for fabricating a flexible substrate provided by the present invention, the flexible substrate and the fiber laminate jointly form a flexible substrate, which can effectively prevent high-temperature deformation of the flexible layer, can reduce stress and maximize adhesion of the film on the substrate, and improve the adhesion. The bending and compressive strength of the substrate.
  • the present invention also provides a display device comprising the above flexible substrate.
  • the display device can be any product or component having a display function such as a liquid crystal panel, an electronic paper, an OLED panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Manufacturing & Machinery (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种柔性基板及其制作方法，以及利用该柔性基板的显示装置。该柔性基板包括衬底（1），该衬底（1）上设有多层柔性层（2），相邻两层柔性层（2）之间设有纤维铺层（3）。由柔性层（2）和纤维铺层（3）共同形成柔性基板，可有效防止柔性层（2）发生高温变形，降低应力，最大程度地提高基板上薄膜的附着力，提高基板的弯曲和压缩强度。

Description

一种柔性基板及其制作方法、 以及显示装置
技术领域
本发明涉及柔性显示技术领域， 特别涉及柔性基板及其制作方 法、 以及利用该柔性基板的显示装置。
背景技术
随着电子信息技术的飞速发展以及消费者需求的越来越高，显示 器的品质和显示模式越来越受消费者关注。消费者已经不满足于单纯 的视觉感知， 还要求显示器更轻薄、 便携化、 个性化等。 显示器从厚 重的 CRT发展到薄型化的 LCD便是一个质的飞跃， 如今 LCD在诸如高 分辨率、 窄边框、 低功耗等的显示品质方面也有了很大的突破。 近年 来， 发展迅速的 3D、 触摸等功能受到了广大消费者的欢迎。 但是， LCD由于其液晶材料的固有特性而导致其具有响应速度慢、 对比度 低、视角小的缺陷，这在目前还难以突破。下一代 OLED( Organic Light Emitting Device )显示技术的出现引起了广泛的关注， 由于其具有显 示品质优、 无视角和对比度限制、 轻薄 （约 0.2mm )、 自主发光等优 点， 因此成为各大显示面板厂商争相开发的具有竟争力的显示技术。
此外， 传统的显示器都是平板显示器， 不可以随意弯曲。 未来的 趋势是希望在柔性体上呈现大量的信息， 即在柔性显示器上进行显 示， 也即实现柔性显示。 对于柔性显示器的官方定义为， 其显示屏和 模组在基板包装、 生产、 存储、 使用、 操作、 工序衔接、 搬运、 运输 等任何一个步骤中都可以实现机械弯曲的显示器装置 （引自 IEC TC110 WG8 X 实现柔性显示的关键在于提供柔性显示器， 提供柔性 显示器的关键在于釆用适当的基板技术、阵列技术和封装技术。目前, 可以实现柔性显示的显示器有 LCD、OLED、EPD(电子纸显示）、PDLC (聚合物分散液晶）、 和 ChLC (胆甾相液晶)模式的显示器， 显示器所 釆用的基板主要有超薄玻璃、 金属箔片、 塑料这三种形式的基板， 以 及显示器所釆用的阵列技术除传统的非晶硅技术之外还包括近些年 逐步发展的低温多晶硅 （LTPS )、 氧化物 （ Oxide )、 和有机薄膜晶体 管 （OTFT )技术。 对于 OLED模式的显示器而言， 由于 OLED器件对 水汽和氧气非常敏感， 并且很容易发生性能衰减， 因此必须对 OLED 器件进行封装， 主要釆用基板和薄膜封装（TFE )。
超薄玻璃基板对水汽和氧气的阻隔性能好， 且其透明性好， 但是 其对裂紋缺陷很敏感， 并且其抗冲击性和弯折性很差， 不易实现卷对 卷（mil to roll )的工艺， 而开发超薄可挠曲的玻璃很难实现。 金属箔 片基板具有阻隔水汽和氧气的功能， 且其耐高温、 低成本、 本身具有 延展性、 易于实现卷对卷工艺， 但是， 金属箔片表面粗糙 (粗糙度约 Ο.όμιη), 即使经过抛光处理后， 仍然需要镀上平坦化层， 这增加了基 板的厚度， 从而导致显示器的厚度增加。 塑料基板的柔韧性更好、 质 量更轻、 更耐冲击， 但是， 塑料基板不耐高温， 必须在很低的温度下 完成 TFT制程， 这会增加薄膜中的缺陷， 但是， 在高温下塑料的变形 量很大， 在高于玻璃化转变温度的温度下， 塑料的变形量严重增加， 而且塑料基板与薄膜之间的晶格匹配不如玻璃基板， 从而薄膜易脱 落。
发明内容
(一）要解决的技术问题
鉴于此， 本发明所要解决的技术问题是， 提供一种不易变形、 同 时兼顾强度和柔软度的柔性基板及其制作方法、以及釆用该柔性基板 的显示装置。
(二）技术方案
为了解决上述技术问题， 本发明的一方面提供一种柔性基板， 其 包括： 衬底， 所述衬底上设有多层柔性层， 相邻两层柔性层之间设有 纤维铺层。
优选地， 所述柔性层由树脂类材料制成。
优选地， 所述树脂类材料为树脂塑料。
优选地， 所述树脂塑料由聚酰亚胺、 聚对萘二甲酸乙二醇酯或聚 对苯二甲酸乙二醇酯制成。
优选地， 所述纤维铺层由纤维交错分布形成。
优选地， 所述纤维按照（0° , 90° )或者 (45° , -45° )的正交方 式交错分布。
优选地， 所述纤维包括玻璃纤维和碳纤维。
优选地， 所述纤维为圆束状。
另一方面， 本发明还提供一种柔性基板的制作方法， 其包括： 步 骤 S1 , 在衬底上覆盖一层由树脂类材料制成的柔性层； 步骤 S2, 对 柔性层进行预固化处理； 步骤 S3, 在柔性层上覆盖一层纤维铺层， 所述纤维铺层由纤维交错分布形成； 步骤 S4, 在所述纤维铺层上继 续覆盖一层由树脂类材料制成的柔性层； 步骤 S5, 重复步骤 S2~S4 多次。
优选地， 所述方法还包括： 步骤 S6、 在完成所述步骤 5后， 对 柔性基板抽真空， 并进行固化保温处理。
优选地，所述步骤 S2中预固化的固化时间为 80分钟至 150分钟、 固化温度为 80°C至 200°C。
优选地， 所述步骤 S6中固化的固化时间为 60分钟至 120分钟。 再一方面，本发明还提供一种显示装置，其包括上述的柔性基板。
(三）有益效果 本发明提供的柔性基板及其制作方法、和显示装置中， 由柔性层 和纤维铺层共同形成柔性基板， 可有效防止柔性层发生高温变形， 能 够降低应力且最大程度地提高基板上薄膜的附着力，并且提高了基板 的弯曲和压缩强度。 附图说明
图 1为本发明的实施例的柔性基板的结构示意图。
图 2为本发明的实施例的柔性基板中的纤维的一种正交方式分布 示意图。
图 3为本发明的实施例的柔性基板中的纤维的另外一种正交方式 分布示意图。
图 4为本发明的实施例的柔性基板的制作方法的流程图。
具体实施方式
下面结合附图和实施例，对本发明的具体实施方式作进一步详细 描述。 以下实施例仅用于对本发明进行说明， 但不构成对本发明的范 围的限制。
图 1为本发明的实施例的柔性基板的结构示意图。 如图 1所示， 本 实施例提供一种柔性基板， 其包括： 衬底 1 , 所述衬底上设有多层柔 性层 2, 相邻两层柔性层 2之间设有纤维铺层 3。 其中， 柔性层 2由树脂 类材料制成。
本实施例中， 在两层柔性层 2之间加设纤维铺层 3, 可有效防止 柔性层发生高温变形，能够降低应力且最大程度地提高基板上薄膜的 附着力， 并且提高了基板的弯曲和压缩强度。
具体的， 所述树脂类材料优选为树脂塑料。 其中， 树脂塑料优选 由例如聚酰亚胺、聚对萘二甲酸乙二醇酯或聚对苯二甲酸乙二醇酯制 成。 柔性层的厚度在几十微米的数量级。 图 2为本发明的实施例的柔性基板中的纤维的一种正交方式分布 示意图。 图 3为本发明的实施例的柔性基板中的纤维的另外一种正交 方式分布示意图。
参考图 2和图 3, 由于柔性显示器的柔性基板所要承受的机械力 主要为弯曲和压缩应力， 因此， 使得纤维铺层中的纤维按照 （0° , 90° )或者 (45° , -45° )的正交方式交错分布， 这样， 与其他交错方 式相比， 可最大程度地提高不同方向的弯曲和压缩性能。
其中， 纤维按照 （0° , 90° )的正交方式交错分布具体指的是: 一部分纤维按照平行于 X坐标轴的方向进行分布， 另一部分纤维按 照平行于 Y坐标轴的方向进行分布， 从而使得这两部分纤维呈 90° 的正交方式交错分布。
需要说明的是， 纤维按照 (45° , -45° )的正交方式交错分布具体 指的是： 一部分纤维按照与 X坐标轴呈 45° 夹角的方向进行分布， 另一部分纤维按照与 Y坐标轴呈 45° 夹角的方向进行分布， 从而使 得这两部分纤维呈 90° 的正交方式交错分布。
其中， 纤维优选地例如可以为玻璃纤维、 碳纤维。
优选地，所述纤维为圆束状。与纤维结构为其他形状的情况相比， 纤维结构为圆束状的情况下与柔性层（例如， 树脂类材料）接触的表 面积较大， 故纤维与柔性层的粘结强度较高， 柔性层固化后， 在纤维 方向上一定程度地限制了柔性层的高温变形，缩小了柔性层的高温变 形量。 从而， 提高了在基板上面生长的薄膜的粘附力， 减少了薄膜脱 落的可能性。
本发明提供的柔性基板由柔性层和纤维铺层共同形成，可有效防 止柔性层发生高温变形，能够降低应力且最大程度地提高基板上薄膜 的附着力， 并且提高了基板的弯曲和压缩强度。
图 4为本发明的实施例的柔性基板的制作方法的流程图。
如图 4所示， 本发明还提供了一种上述柔性基板的制作方法， 其 包括以下步骤。
步骤 SI , 在衬底上覆盖一层由树脂类材料制成的柔性层。
其中， 树脂类材料优选为树脂塑料， 树脂塑料的厚度在几十微米 的数量级， 而且， 树脂塑料优选由聚酰亚胺（PI )、 聚对萘二甲酸乙 二醇酯（PEN)、 聚对苯二甲酸乙二醇酯（PET)制成。
步骤 S2, 对柔性层进行预固化处理， 使其在衬底上具有一定的 形态和强度。
其中，预固化的固化时间为 80分钟至 150分钟、固化温度为 80°C 至 200。C。
步骤 S3, 在柔性层上覆盖一层纤维铺层， 所述纤维铺层由纤维 交错分布形成。
具体地,使得纤维铺层中的纤维按照（0° , 90° )或者 (45° , -45° ) 的正交方式交错分布， 这样， 与其他交错方式相比， 可最大程度地提 高不同方向的弯曲和压缩性能。
在相邻两层柔性层之间加设纤维铺层，可有效防止柔性层发生高 温变形， 能够降低应力且最大程度地提高基板上薄膜的附着力， 从而 提高基板的弯曲和压缩强度。
步骤 S4, 在所述纤维铺层上继续覆盖一层由树脂类材料制成的 柔性层。
步骤 S5, 重复步骤 S2~S4多次。
通常重复 S2~S4操作 2至 4次， 以提高柔性基板的强度。 重复 S2-S4操作的次数可以根据实际需求而定。
步骤 S6、 在完成步骤 5后， 对柔性基板抽真空， 并进行固化保 温处理。 其中， 固化时间为 60分钟至 120分钟。
对柔性基板抽真空， 并进行固化保温处理， 可以使其排出挥发组 分， 使多层复合的材料固化压实， 排掉柔性层 （例如， 树脂类材料） 内部的孔洞， 从而提高柔性基板的机械性能。 本发明提供的柔性基板的制作方法中， 由柔性层和纤维铺层共同 形成柔性基板， 可有效防止柔性层发生高温变形， 能够降低应力且最 大程度地提高基板上薄膜的附着力，并且提高了基板的弯曲和压缩强 度。
另外， 本发明还提供一种显示装置， 其包括上述的柔性基板。 该 显示装置可以为液晶面板、 电子纸、 OLED面板、 手机、 平板电脑、 电视机、 显示器、 笔记本电脑、 数码相框、 导航仪等任何具有显示功 能的产品或部件。
以上所述仅是本发明的优选实施方式， 应当指出， 对于本技术领 域的普通技术人员来说， 在不脱离本发明的技术原理的前提下， 还可 以做出许多改进和变型， 这些改进和变型也应视为本发明的保护范 围。

Claims

权 利 要 求 书
1、 一种柔性基板， 其特征在于， 包括：
衬底， 所述衬底上设有多层柔性层， 相邻两层柔性层之间设有纤 维铺层。
2、 如权利要求 1所述的柔性基板， 其特征在于， 所述柔性层由 树脂类材料制成。
3、 如权利要求 2所述的柔性基板， 其特征在于， 所述树脂类材 料为树脂塑料。
4、 如权利要求 3所述的柔性基板， 其特征在于， 所述树脂塑料 由聚酰亚胺、 聚对萘二甲酸乙二醇酯或聚对苯二甲酸乙二醇酯制成。
5、 如权利要求 1所述的柔性基板， 其特征在于， 所述纤维铺层 由纤维交错分布形成。
6、 如权利要求 5所述的柔性基板， 其特征在于， 所述纤维按照 ( 0° , 90° )或者 (45° , -45° )的正交方式交错分布。
7、 如权利要求 5所述的柔性基板， 其特征在于， 所述纤维包括 玻璃纤维和碳纤维。
8、 如权利要求 5所述的柔性基板， 其特征在于， 所述纤维为圆 束状。
9、 一种柔性基板的制作方法， 其特征在于， 包括： 步骤 S1 , 在衬底上覆盖一层由树脂类材料制成的柔性层； 步骤 S2, 对柔性层进行预固化处理；
步骤 S3, 在柔性层上覆盖一层纤维铺层， 所述纤维铺层由纤维 交错分布形成；
步骤 S4, 在所述纤维铺层上继续覆盖一层由树脂类材料制成的 柔性层；
步骤 S5, 重复步骤 S2~S4多次。
10、 如权利要求 9所述的制作方法， 其特征在于， 还包括： 步骤 S6、 在完成所述步骤 5后， 对柔性基板抽真空， 并进行固 化保温处理。
11、 如权利要求 9所述的制作方法， 其特征在于， 所述步骤 S2 中预固化的固化时间为 80 分钟至 150 分钟、 固化温度为 80°C至 200。C。
12、 如权利要求 10所述的制作方法， 其特征在于， 所述步骤 S6 中固化的固化时间为 60分钟至 120分钟。
13、 一种显示装置， 其特征在于， 包括权利要求 1至 8中任一项 所述的柔性基板。
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