WO2016045279A1 - 一种封装层、电子封装器件及显示装置 - Google Patents

一种封装层、电子封装器件及显示装置 Download PDF

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Publication number
WO2016045279A1
WO2016045279A1 PCT/CN2015/071328 CN2015071328W WO2016045279A1 WO 2016045279 A1 WO2016045279 A1 WO 2016045279A1 CN 2015071328 W CN2015071328 W CN 2015071328W WO 2016045279 A1 WO2016045279 A1 WO 2016045279A1
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Prior art keywords
layer
substrate
organic coating
encapsulating
acrylate
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PCT/CN2015/071328
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English (en)
French (fr)
Inventor
王涛
周伟峰
张嵩
孙韬
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京东方科技集团股份有限公司
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Priority to US14/777,774 priority Critical patent/US9685632B2/en
Publication of WO2016045279A1 publication Critical patent/WO2016045279A1/zh

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    • 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
    • H10K59/873—Encapsulations
    • H10K59/8731—Encapsulations multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
    • 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
    • H10K50/8445—Encapsulations multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/10—Organic polymers or oligomers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/10—Organic polymers or oligomers
    • H10K85/151—Copolymers
    • 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
    • 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
    • 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
    • H10K2102/351—Thickness

Definitions

  • the present invention relates to the field of electronic technologies, and in particular, to an encapsulation layer, an electronic package device, and a display device.
  • OLED Organic Light Emitting Diode
  • CCD Charge-coupled Device
  • the inorganic passivation layer 301 and the water-oxygen barrier film 303, or the encapsulation film 302 and the water-oxygen barrier film 303 may be passed through in the prior art.
  • the OLED display device is packaged.
  • the water-oxygen barrier film 303 is usually prepared by a high-molecular polymer material by an extrusion molding process; limited to the preparation process, the thickness of the water-oxygen barrier film 303 needs to be controlled at about 50 ⁇ m to ensure uniformity thereof.
  • the conventional packaging technology uses the water-oxygen barrier film 303 and the inorganic passivation layer 301 or the encapsulating film 302 to be bonded by means of an adhesive, which is disadvantageous for realizing lightness and thinning of the electronic device.
  • the invention provides an encapsulation layer, an electronic packaging device and a display device, which can reduce the thickness of the encapsulation layer, thereby realizing the thinning and thinning of the electronic packaging device.
  • an encapsulation layer comprising an encapsulating barrier layer and an organic coating formed directly on the encapsulating barrier layer; wherein the organic coating is a polymerizable organic coating; the polymerizable organic coating
  • the layer comprises an unsaturated acrylate based organic coating.
  • the organic coating has a thickness of 5 ⁇ m to 10 ⁇ m.
  • the unsaturated acrylate organic coating comprises a urethane acrylate organic coating or an epoxy acrylate organic coating.
  • the unsaturated acrylate organic coating layer is added with a cationic surfactant; wherein the cationic surfactant comprises a hydrophilic quaternary ammonium salt.
  • the unsaturated acrylate-based organic coating comprises a first coating adjacent to the encapsulating barrier layer and a second coating remote from the encapsulating barrier layer; wherein the first coating has a refractive index greater than The refractive index of the second coating.
  • the first coating layer comprises one or more of a silane-modified unsaturated acrylate-based polymer, an unsaturated urethane acrylate-based polymer, and an unsaturated fluorine-containing acrylate-based polymer;
  • the second coating layer includes an unsaturated acrylate-based polymer doped with inorganic particles; the inorganic particles include one or more of titanium oxide, titanium oxide, zinc oxide, copper copper titanate, and barium titanate.
  • the unsaturated acrylate organic coating layer comprises an unsaturated acrylate organic coating doped with hard particles; wherein the hard particles include graphene oxide, transparent graphite, glass fiber, diamond particles One or more of them.
  • the encapsulating barrier layer comprises a plurality of layers of overlapping packaging films.
  • an electronic package device comprising a substrate substrate and an encapsulation layer, and an electronic device therebetween; the encapsulation layer being the encapsulation layer described above.
  • the electronic package device is an OLED display device, and the electronic device is an organic material functional layer between the substrate substrate and the encapsulation layer; wherein the encapsulation barrier layer of the encapsulation layer is adjacent to the lining a base substrate, the organic coating of the encapsulation layer being away from the substrate substrate.
  • the base substrate is a flexible substrate; wherein the flexible substrate comprises a polyimide substrate, a polyethylene substrate, a polypropylene substrate, and a polystyrene substrate. Any one of a polyethylene terephthalate base substrate and a polyethylene naphthalate base substrate.
  • a display device comprising the electronic package device described above.
  • Embodiments of the present invention provide an encapsulation layer, an electronic package device, and a display device, the encapsulation layer including an encapsulation barrier layer and an organic coating layer formed directly on the encapsulation barrier layer; wherein the organic coating layer is a polymeric organic coating; the polymerizable organic coating comprises an unsaturated acrylate organic coating.
  • the encapsulation layer provided by the embodiment of the present invention may be composed of the encapsulation barrier layer and the organic coating layer; wherein the encapsulation barrier layer has a certain water and oxygen barrier effect, and the organic coating layer The effect of water and oxygen barrier can be further improved.
  • the organic coating is used instead of the water-oxygen barrier film, bonding can be achieved without using an adhesive, and the thickness of the organic coating is significantly smaller than the water-oxide barrier film. Therefore, under the premise of ensuring the water-oxygen barrier effect of the encapsulation layer, the thickness of the encapsulation layer can be significantly reduced, thereby achieving thinning of the electronic package device.
  • FIG. 1(a) and 1(b) are schematic structural views of an OLED display device in the prior art
  • FIG. 2 is a schematic structural diagram of an encapsulation layer according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram 1 of an electronic package device (OLED display device) according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram 2 of an electronic package device (OLED display device) according to an embodiment of the present invention
  • FIG. 5 is a flow chart of preparing an electronic package device (OLED display device) according to an embodiment of the present invention.
  • 10-(flexible) substrate 20-electronic device/organic material functional layer; 30-encapsulation layer; 301-inorganic passivation layer; 302-package film; 303-water oxygen barrier film; 304-package barrier layer; - organic coating; 40-thin film transistor.
  • An embodiment of the present invention provides an encapsulation layer 30, as shown in FIG. 2, including a package barrier layer 304 and an organic coating layer 305 formed directly on the encapsulation barrier layer 304; wherein the organic coating layer 305 is A polymeric organic coating, which may comprise an unsaturated acrylate based organic coating.
  • the encapsulating barrier layer 304 may adopt an inorganic passivation layer 301 as shown in FIG. 1 , such as a silicon nitride film; or the package blocking layer 304 may also be packaged as shown in FIG. 2 .
  • the film 302 is, for example, an organic film and an inorganic film which are alternately deposited.
  • the formation of the organic coating layer 305 may include two stages of organic solution coating and solidification film formation; wherein the coating method of the organic solution may include spin coating, spray coating, flat wiper film, inkjet printing, Any one of slit coating; the method of curing the film formation may include any one of ultraviolet curing, visible light curing, thermal curing, and chemical decomposition curing.
  • the encapsulation layer 30 provided by the embodiment of the present invention is mainly used for encapsulating an electronic device, so the encapsulation layer 30 needs to be formed on a specific substrate surface; wherein the substrate surface may specifically be needed The surface of the packaged electronic device.
  • An embodiment of the present invention provides an encapsulation layer 30 including a package barrier layer 304 and an organic coating layer 305 formed directly on the encapsulation barrier layer 304; wherein the organic coating layer 305 is a polymerizable organic coating layer,
  • the polymerizable organic coating comprises an unsaturated acrylate based organic coating.
  • the encapsulation layer 30 provided by the embodiment of the present invention may be composed of the encapsulation barrier layer 304 and the organic coating layer 305; wherein the encapsulation barrier layer 304 has a certain water and oxygen barrier function.
  • the organic coating 305 can further improve the effect of water oxygen barrier.
  • bonding can be achieved without using an adhesive, and the organic
  • the thickness of the coating layer 305 is significantly smaller than the thickness of the water-oxygen barrier film 303, so that the thickness of the encapsulation layer 30 can be significantly reduced under the premise of ensuring the water-oxygen barrier effect of the encapsulation layer 30, thereby realizing electronic packaging.
  • the device is light and thin.
  • the encapsulating barrier layer 304 may be an inorganic passivation layer 301 or a package film 302 having a thickness of about 1 ⁇ m; the organic coating layer 305 is preferably an unsaturated acrylate organic coating layer having a thickness of 1 ⁇ 10 ⁇ m, preferably 2.5 to 10 ⁇ m, more preferably 5 to 7.5 ⁇ m.
  • the encapsulating barrier layer 304 preferably employs a multi-layered overlying encapsulating film 302, such as an alternating organic film and an inorganic film.
  • the encapsulation film 302 has a better water and oxygen barrier effect than the inorganic passivation layer 301.
  • the unsaturated acrylate organic coating layer may specifically include a urethane acrylate organic coating or an epoxy acrylate organic coating.
  • the unsaturated acrylate may be selected from unsaturated acrylates commonly used in the art to form a film layer when cured by ultraviolet light, visible light, heat, chemical reaction, etc., and specific examples thereof include: hydroxyethyl acrylate, Amino acrylate, epoxy acrylate, alicyclic epoxy methacrylate, methyl methacrylate, and the like.
  • the unsaturated acrylate is a urethane acrylate or an epoxy acrylate.
  • the urethane acrylate may be selected from one or more of the following: urethane acrylate, silicone-acrylate modified polyurethane, epoxy modified urethane acrylate, aliphatic modified urethane acrylate Classes, etc.
  • the epoxy acrylate may be bisphenol A epoxy acrylate.
  • the unsaturated acrylate has a weight average molecular weight of from 5,000 to 100,000, preferably from 10,000 to 50,000, and more preferably from 10,000 to 25,000, for the purpose of achieving sufficient crosslinking to avoid the need to use a binder and provide sufficient water oxygen barrier effect.
  • the organic coating layer in the encapsulating layer according to the present invention may further contain various functional additives, such as an antifogging agent, an antireflection agent, a scratch resistant agent, etc., and the content in the organic coating layer may be determined according to the Need performance to choose properly.
  • the organic coating may be an organic coating doped with anti-fogging particles or a surfactant, or may be a water-absorbing anti-fog organic coating.
  • the doped anti-fog particles include: titanium dioxide, zinc oxide, nano-silica, super-hydrophobic silicon material, male/anionic/zwitterionic surfactant, modified polymer, etc.; water-absorbing organic coating includes high water absorption Polyol urethane resin and the like.
  • the anti-reflection function achieves anti-reflection by adding particles of different refractive indices, and the low refractive index coating is mainly fluoridated by adding low refractive index.
  • Low refractive index is achieved by one or more of a fluorine-containing acrylate, a silane-modified unsaturated acrylate polymer, an unsaturated urethane acrylate polymer, and an unsaturated fluorine-containing acrylate polymer;
  • the coating of the refractive index is generally added by adding inorganic nano-oxides such as titanium dioxide, titanium oxide, acicular zinc oxide, calcium nano-titanium titanate, barium titanate to the photocurable acrylate or epoxy coating.
  • the scratch-resistant hard particles are added to the organic coating or mixed with a hard monomer to form a film, which can improve scratch resistance.
  • the scratch-resistant agent is, for example, one or more selected from the group consisting of glass fibers, celluloses, silica particles, or silicon-containing particles, alumina particles, graphene oxide, transparent graphite, glass fibers, and diamond particles.
  • the organic coating layer 305 can have other properties such as anti-fog while having a water-oxygen barrier effect. Sex, anti-reflective, and scratch resistant.
  • a cationic surfactant may be added to the unsaturated acrylate organic coating.
  • the cationic surfactant may be selected from one or more of the group consisting of alkylbenzenesulfonic acid, alkylbetaine, alanine, fatty alkanesulfonate, and other polyol fatty acid salts, and the like.
  • the cationic surfactant comprises a hydrophilic quaternary ammonium salt.
  • the hydrophilic quaternary ammonium salt is selected from long chain quaternary ammonium salts containing a curable double bond structure, such as ethyl bromide.
  • the hydrophilic quaternary ammonium salt is preferably a quaternary ammonium salt which can be subjected to ultraviolet photopolymerization, and the quaternary ammonium salt can be reacted by adding brominated alkane and acrylate having different chain lengths to obtain low molecular quaternary ammonium having different chain lengths. salt.
  • the cationic surfactant to the unsaturated acrylate organic coating layer, the wettability of the organic solution and the surface of the substrate can be effectively improved, so that the organic solution can be tiled in the The surface of the substrate eliminates the diffuse reflection of light and achieves an anti-fog effect.
  • the additive material in the unsaturated acrylate-based organic coating layer is not limited to the cationic surfactant, and may also be other super-hydrophilicity. Materials, or superhydrophobic materials, or amphiphilic materials.
  • the unsaturated acrylate organic coating may include close to the package a first coating of the barrier layer 304 and a second coating remote from the encapsulating barrier layer 304; wherein the first coating has a refractive index greater than a refractive index of the second coating.
  • the first coating layer may include one or more of a silane-modified unsaturated acrylate-based polymer, an unsaturated urethane acrylate-based polymer, and an unsaturated fluorine-containing acrylate-based polymer;
  • the polymer may be a monofunctional polymer or a polyfunctional polymer, which is not limited herein.
  • the first coating layer has a thickness of from 1 to 10 ⁇ m, preferably from 2.5 to 10 ⁇ m, and more preferably from 2.5 to 7.5 ⁇ m.
  • the second coating layer may include an unsaturated acrylate-based polymer doped with inorganic particles; specifically, the material of the second coating layer may be the same as or different from the material of the first coating layer, The addition of the inorganic particles to the material of the second coating allows the second coating to have a relatively high refractive power.
  • the inorganic particles may include one or more of titanium dioxide, titanium oxide, acicular zinc oxide, calcium nano titanate, and barium titanate.
  • the second coating layer has a thickness of from 1 to 10 ⁇ m, preferably from 2.5 to 10 ⁇ m, and more preferably from 2.5 to 7.5 ⁇ m.
  • the particle diameter of the inorganic particles is preferably from 20 to 1000 nm, more preferably from 30 to 500 nm and most preferably from 50 to 250 nm.
  • the reflective effect of the encapsulating layer 30 can be improved, making it low-reflective or even Anti-reflective.
  • the unsaturated acrylate organic coating layer may further include an unsaturated acrylate organic coating doped with hard particles; wherein the hard particles may specifically include graphene oxide, transparent graphite, One or more of glass fibers and diamond particles.
  • the hard particles have a relatively high hardness, and by doping the above-described hard particles in the unsaturated acrylate-based organic coating layer, the scratch resistance of the encapsulating layer 30 can be effectively improved.
  • the organic coating for the encapsulating layer according to the present invention may be prepared from a composition comprising an unsaturated acrylate, an additive, and a solvent.
  • the unsaturated acrylate is preferably a urethane acrylate or an epoxy acrylate.
  • the content of the unsaturated acrylate is from 10 to 85% by weight, preferably from 20 to 60% by weight, more preferably from 20 to 40% by weight, based on the total weight of the composition.
  • the unsaturated acrylate may be selected from those commonly used in the art for passing ultraviolet light, An unsaturated acrylate which forms a film layer upon curing by visible light, heat, chemical reaction, etc., and specific examples thereof include: hydroxyethyl acrylate, amino acrylate, epoxy acrylate, alicyclic epoxy methacrylate, Methyl methacrylate and the like.
  • the unsaturated acrylate is a urethane acrylate or an epoxy acrylate.
  • the urethane acrylate may be selected from one or more of the following: urethane acrylate, silicone-acrylate modified polyurethane, epoxy modified urethane acrylate, aliphatic modified urethane acrylate Classes, etc.
  • the epoxy acrylate may be bisphenol A epoxy acrylate.
  • the unsaturated acrylate has a weight average molecular weight of from 5,000 to 100,000, preferably from 10,000 to 50,000, and more preferably from 10,000 to 25,000, for the purpose of achieving sufficient crosslinking to avoid the need to use a binder and provide sufficient water oxygen barrier effect.
  • the organic coating layer in the encapsulating layer according to the present invention may further contain various functional additives, such as an antifogging agent, an antireflection agent, a scratch resistant agent, etc., and the content in the organic coating layer may be determined according to the Need performance to choose properly.
  • the organic coating may be an organic coating doped with anti-fogging particles or a surfactant, or may be a water-absorbing anti-fog organic coating.
  • the doped anti-fog particles include: titanium dioxide, zinc oxide, nano-silica, super-hydrophobic silicon material, male/anionic/zwitterionic surfactant, modified polymer, etc.; water-absorbing organic coating includes high water absorption Polyol urethane resin and the like.
  • the anti-reflection function achieves anti-reflection by adding particles of different refractive indices.
  • the low refractive index coating mainly consists of adding low refractive fluoride, fluorine-containing acrylate, silane-modified unsaturated acrylate polymer, unsaturated urethane acrylic acid.
  • High refractive is achieved by adding one or more of inorganic nano-oxides such as titanium dioxide, titanium oxide, acicular zinc oxide, calcium nano-titanate, and barium titanate.
  • the scratch-resistant hard particles are added to the organic coating or mixed with a hard monomer to form a film, which can improve scratch resistance.
  • the scratch-resistant agent is, for example, one or more selected from the group consisting of glass fibers, celluloses, silica particles, or silicon-containing particles, alumina particles, graphene oxide, transparent graphite, glass fibers, and diamond particles.
  • the organic coating layer 305 can have other properties such as anti-fog while having a water-oxygen barrier effect. Sex, anti-reflective, and scratch resistant.
  • An embodiment of the present invention further provides an electronic package device, as shown in FIG. 3, comprising a substrate substrate 10 and an encapsulation layer 30, and an electronic device 20 therebetween;
  • the encapsulation layer 30 is the encapsulation layer provided by the above embodiments.
  • the electronic package device may include an OLED display device, a CCD device, an electronic paper, a smart tag, and a smart card, and is not limited thereto.
  • the core component of the electronic package device ie, the electronic device 20
  • the electronic device 20 Since the core component of the electronic package device (ie, the electronic device 20) is very sensitive to moisture and oxygen in the atmospheric environment, in order to ensure the normal operation of the electronic device 20, it needs to be packaged to extend its service life. .
  • the electronic device 20 can be packaged, which not only ensures good water-oxygen barrier effect, but also can realize thinning and thinning of the electronic package device. .
  • the electronic package device may be an OLED display device, and the electronic device 20 may be an organic material functional layer 20 between the substrate substrate 10 and the encapsulation layer 30;
  • the encapsulating barrier layer 304 of the encapsulation layer 30 is adjacent to the substrate substrate 10 , and the organic coating layer 305 of the encapsulation layer 30 is away from the substrate substrate 10 .
  • the substrate substrate 10 may be a glass substrate or a flexible substrate, which is not specifically limited herein.
  • the OLED display device can be divided into the passively driven OLED display device shown in FIG. 3 and the active driving OLED display device shown in FIG. 4 according to the driving manner thereof.
  • the OLED display device may further include a thin film transistor 40 between the substrate substrate 10 and the organic material functional layer 20, Driving each of the light emitting units of the OLED display device.
  • the encapsulation barrier layer 304 may be formed over the organic material functional layer 20, and the organic coating layer 305 may be formed on the surface of the encapsulation barrier layer 304.
  • the package barrier layer 304 may include an inorganic passivation layer 301 or a package film 302.
  • the OLED display device provided by the embodiment of the present invention deposits a layer of encapsulating barrier layer 304 on the surface of the functional layer 20 of the organic material, and applies a layer of cured film forming on the surface of the encapsulating barrier layer 304.
  • Organic coating 305 can be guaranteed Under the premise of the water-oxygen barrier effect of the encapsulation layer 30, the thickness of the OLED display device is effectively reduced, thereby achieving thinning of the OLED display device.
  • the encapsulating barrier layer 304 preferably employs a multi-layered overlying encapsulating film 302, such as an alternating deposition of an organic film and an inorganic film.
  • the encapsulation film 302 has a better water and oxygen barrier effect than the inorganic passivation layer 301.
  • the substrate substrate 10 is preferably a flexible substrate substrate.
  • the flexible substrate substrate 10 may include a polyimide (PI) substrate, polyethylene (PE). a base substrate, a polypropylene (PP) substrate, a polystyrene (PS) substrate, a polyethylene terephthalate (PET) substrate, And any one of a polyethylene naphthalate (PEN) base substrate.
  • PI polyimide
  • PE polyethylene
  • PP polypropylene
  • PS polystyrene
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • the OLED display device is a flexible OLED display device.
  • the reduction in the thickness of the device can effectively reduce the internal stress of the flexible OLED display device, thereby improving the occurrence of bending cracks and poor separation of layers. Improving the bending performance of the OLED display device.
  • the OLED display device preferably employs the flexible substrate substrate 10 and the encapsulation layer 30 provided by the embodiment of the present invention, and the organic material functional layer 20 therebetween to form a flexible OLED display device;
  • the curved display characteristics of flexible OLED display devices provide users with a new visual experience.
  • the OLED display device can also have anti-fog, low reflection, scratch resistance and the like, thereby expanding the application field thereof. Improve its display.
  • composition of the organic coating layer 305 and the effect that can be achieved can be referred to the description of the portion of the encapsulation layer 30 provided by the embodiment of the present invention, and details are not described herein again.
  • the illuminating manner of the OLED display device provided by the embodiment of the present invention may be a top emission or a bottom emission, and may also be a double-sided emission, which is not limited herein.
  • the top emission refers to a side of the light emitting direction away from the substrate 10
  • the bottom emission is The light-emitting direction is directed to the side of the base substrate 10, and the double-sided emission includes the above two cases.
  • the encapsulation layer 30 provided by the embodiment of the present invention can effectively block moisture and oxygen in the atmospheric environment from entering the OLED display device. Internally, it is thereby possible to improve the illuminating performance of the flexible top emission type display device and extend the life of the device.
  • Embodiments of the present invention also provide a display device including the above-described electronic package device.
  • the display device may specifically include a device having a display function, such as a display, a mobile phone, or a digital camera, and is not specifically limited herein.
  • the OLED display device may include a flexible substrate substrate 10, a thin film transistor 40 located above the flexible substrate substrate 10, and an organic material functional layer 20 located above the thin film transistor 40.
  • the preparation process of the OLED display device may include the following steps:
  • a flexible substrate substrate 10 is provided.
  • the flexible base substrate 10 preferably employs a PI substrate having a thickness of about 10 ⁇ m.
  • the thin film transistor may sequentially include a gate, a gate insulating layer above the gate, a semiconductor active layer above the gate insulating layer, and a source above the semiconductor active layer and in the same layer Pole and drain.
  • the thin film transistor 40 may constitute an active driving control layer of the OLED display device, and has a thickness of about 4 ⁇ m.
  • the organic material functional layer 20 may specifically include a red light emitting unit, a green light emitting unit, and a blue light emitting unit, and the light emitting unit may be in one-to-one correspondence with the thin film transistor 40.
  • the organic material functional layer 20 has a thickness of about 500 nm.
  • the material of the encapsulating barrier layer 304 may be an inorganic passivation material such as silicon nitride, and the silicon nitride has a thickness of about 1 ⁇ m.
  • the coating manner of the organic solution may include any one of spin coating, spray coating, flat wiper film, inkjet printing, and slit coating; the thickness of the formed organic coating 305 may be the same as the PI substrate.
  • the thickness of the platform is about 10 ⁇ m.
  • the organic coating layer 305 is preferably an organic coating layer having both water and oxygen barrier properties, antifogging properties, low reflectivity, and scratch resistance.
  • a flexible OLED display device can be formed; the flexible OLED display device not only has the characteristics of lightness and thinness, but also has excellent characteristics of blocking water oxygen, anti-fog, low reflection, and scratch resistance, and can Effectively improving the display effect of the OLED display device.

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Abstract

一种封装层（30）、电子封装器件及显示装置，涉及电子技术领域，可减小封装层的厚度，从而实现电子封装器件的轻薄化。该封装层（30）包括封装阻隔层（304）和直接在该封装阻隔层（304）上形成的有机涂层（305）；其中有机涂层（305）为可聚合型有机涂层，该可聚合型有机涂层包括不饱和丙烯酸酯类有机涂层，该封装层用于对电子器件进行封装。

Description

一种封装层、电子封装器件及显示装置 技术领域
本发明涉及电子技术领域，尤其涉及一种封装层、电子封装器件及显示装置。
背景技术
许多电子器件诸如OLED(Organic Light Emitting Diode，有机电致发光器件)或者CCD(Charge-coupled Device，电荷耦合器件)，对于大气环境中的水分和氧气十分敏感；为了保证所述电子器件的正常工作，需要对其进行封装，使其免受大气环境中的水分和氧气的影响，从而延长其使用寿命。
以OLED显示器件为例，如图1(a)和图1(b)所示，现有技术中可以通过无机钝化层301和水氧阻隔膜303、或者封装薄膜302和水氧阻隔膜303相结合的方式，对所述OLED显示器件进行封装。其中，所述水氧阻隔膜303通常采用高分子聚合物材料通过挤出成型工艺制备而得；受限于制备工艺，所述水氧阻隔膜303的厚度需要控制在50um左右，才能保证其均一性；在此基础上，所述无机钝化层301和所述水氧阻隔膜303之间或者所述封装薄膜302和所述水氧阻隔膜303之间还需要通过粘结剂进行粘结，这样便会导致封装层30厚度的进一步提高。
由此可知，现有的封装技术采用水氧阻隔膜303与无机钝化层301或者封装薄膜302通过粘结剂的方式进行粘接，不利于实现电子器件的轻薄化。
发明内容
本发明提供一种封装层、电子封装器件及显示装置，可减小封装层的厚度，从而实现电子封装器件的轻薄化。
为达到上述目的，本发明的实施例采用如下技术方案：
一方面，提供一种封装层，包括封装阻隔层和直接在所述封装阻隔层上形成的有机涂层；其中，所述有机涂层为可聚合型有机涂层；所述可聚合型有机涂层包括不饱和丙烯酸酯类有机涂层。
可选的，所述有机涂层的厚度为5μm～10μm。
可选的，所述不饱和丙烯酸酯类有机涂层包括聚氨酯丙烯酸酯类有机涂层或者环氧丙烯酸酯类有机涂层。
优选的，所述不饱和丙烯酸酯类有机涂层中添加有阳离子表面活性剂；其中，所述阳离子表面活性剂包括亲水性季铵盐。
优选的，所述不饱和丙烯酸酯类有机涂层包括靠近所述封装阻隔层的第一涂层和远离所述封装阻隔层的第二涂层；其中，所述第一涂层的折射率大于所述第二涂层的折射率。
进一步优选的，所述第一涂层包括硅烷改性不饱和丙烯酸酯类聚合物、不饱和聚氨酯丙烯酸酯类聚合物、不饱和含氟丙烯酸酯类聚合物中的一种或多种；所述第二涂层包括掺杂有无机颗粒的不饱和丙烯酸酯类聚合物；所述无机颗粒包括二氧化钛、一氧化钛、氧化锌、钛酸铜钙、钛酸锶中的一种或多种。
优选的，所述不饱和丙烯酸酯类有机涂层包括掺杂有硬质颗粒的不饱和丙烯酸酯类有机涂层；其中，所述硬质颗粒包括氧化石墨烯、透明石墨、玻璃纤维、金刚石粒子中的一种或多种。
可选的，所述封装阻隔层包括多层交叠的封装薄膜。
另一方面，提供一种电子封装器件，包括衬底基板和封装层，以及位于二者之间的电子器件；所述封装层为上述的封装层。
优选的，所述电子封装器件为OLED显示器件，所述电子器件为所述衬底基板和所述封装层之间的有机材料功能层；其中，所述封装层的封装阻隔层靠近所述衬底基板，所述封装层的有机涂层远离所述衬底基板。
进一步优选的，所述衬底基板为柔性衬底基板；其中，所述柔性衬底基板包括聚酰亚胺衬底基板、聚乙烯衬底基板、聚丙烯衬底基板、聚苯乙烯衬底基板、聚对苯二甲酸乙二醇酯衬底基板、聚萘二甲酸乙二醇酯衬底基板中的任意一种。
再一方面，提供一种显示装置，所述显示装置包括上述的电子封装器件。
本发明的实施例提供一种封装层、电子封装器件及显示装置，所述封装层包括封装阻隔层和直接在所述封装阻隔层上形成的有机涂层；其中，所述有机涂层为可聚合型有机涂层；所述可聚合型有机涂层包括不饱和丙烯酸酯类有机涂层。
基于此，本发明的实施例提供的所述封装层可以由所述封装阻隔层和所述有机涂层共同组成；其中，所述封装阻隔层具有一定的水氧阻隔作用，所述有机涂层可以进一步改善水氧阻隔的效果。在此基础上，采用所述有机涂层替代所述水氧阻隔膜时，二者之间无需使用粘结剂即可实现结合，且所述有机涂层的厚度明显小于所述水氧阻隔膜的厚度，因此在保证所述封装层的水氧阻隔效果的前提下，可使所述封装层的厚度明显降低，从而实现电子封装器件的轻薄化。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1(a)和1(b)为现有技术中OLED显示器件的结构示意图；
图2为本发明的实施例提供的一种封装层的结构示意图；
图3为本发明的实施例提供的一种电子封装器件(OLED显示器件)的结构示意图一；
图4为本发明的实施例提供的一种电子封装器件(OLED显示器件)的结构示意图二；
图5为本发明的实施例提供的一种电子封装器件(OLED显示器件)的制备流程图。
附图标记：
10-(柔性)衬底基板；20-电子器件/有机材料功能层；30-封装层；301-无机钝化层；302-封装薄膜；303-水氧阻隔膜；304-封装阻隔层；305-有机涂层；40-薄膜晶体管。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明的实施例提供一种封装层30，如图2所示，包括封装阻隔层304和直接在所述封装阻隔层304上形成的有机涂层305；其中，所述有机涂层305为可聚合型有机涂层，所述可聚合型有机涂层可以包括不饱和丙烯酸酯类有机涂层。
需要说明的是，第一，所述封装阻隔层304可以采用图1所示的无机钝化层301，例如氮化硅薄膜；或者，所述封装阻隔层304也可以采用图2所示的封装薄膜302，例如交替沉积的有机薄膜和无机薄膜。
第二，所述有机涂层305的形成可以包括有机溶液涂覆和固化成膜两个阶段；其中，所述有机溶液的涂覆方式可以包括旋涂、喷涂、平板刮膜、喷墨打印、狭缝涂布中的任意一种；所述固化成膜的方式可以包括紫外光固化、可见光固化、热固化、化学分解固化中的任意一种。
第三，本发明的实施例提供的所述封装层30主要用于对电子器件进行封装，因此所述封装层30需要形成在特定的基材表面；其中，所述基材表面具体可以是需要进行封装的电子器件的表面。
本发明的实施例提供一种封装层30，包括封装阻隔层304和直接在所述封装阻隔层304上形成的有机涂层305；其中，所述有机涂层305为可聚合型有机涂层，所述可聚合型有机涂层包括不饱和丙烯酸酯类有机涂层。
基于此，本发明的实施例提供的所述封装层30可以由所述封装阻隔层304和所述有机涂层305共同组成；其中，所述封装阻隔层304具有一定的水氧阻隔的作用，所述有机涂层305可以进一步改善水氧阻隔的效果。在此基础上，采用所述有机涂层305替代所述水氧阻隔膜303时，二者之间无需使用粘结剂即可实现结合，且所述有机 涂层305的厚度明显小于所述水氧阻隔膜303的厚度，因此在保证所述封装层30的水氧阻隔效果的前提下，可使所述封装层30的厚度明显降低，从而实现电子封装器件的轻薄化。
基于上述描述，所述封装阻隔层304可以采用无机钝化层301或者封装薄膜302，其厚度约为1μm；所述有机涂层305优选采用不饱和丙烯酸酯类有机涂层，其厚度可以达到1～10μm，优选2.5～10μm，更优选5～7.5μm。
这里，所述封装阻隔层304优选采用多层交叠的封装薄膜302，例如交替沉积的有机薄膜和无机薄膜。相比于所述无机钝化层301，所述封装薄膜302具有更好的水氧阻隔效果。
具体的，所述不饱和丙烯酸酯类有机涂层具体可以包括聚氨酯丙烯酸酯类有机涂层或者环氧丙烯酸酯类有机涂层。
所述不饱和丙烯酸酯可以选自本领域中通常用于在通过紫外光、可见光、热、化学反应等方式进行固化时形成膜层的不饱和丙烯酸酯，其具体实例包括：丙烯酸羟乙酯、氨基丙烯酸酯、环氧丙烯酸酯、脂环族环氧甲基丙烯酸酯类、甲基丙烯酸甲酯等。优选地，所述不饱和丙烯酸酯为聚氨酯丙烯酸酯或者环氧丙烯酸酯。所述聚氨酯丙烯酸酯可以选自下列各项中的一种或多种：氨基甲酸酯丙烯酸酯、有机硅-丙烯酸酯改性聚氨酯、环氧改性聚氨酯丙烯酸酯、脂肪族改性聚氨酯丙烯酸酯类等。所述环氧丙烯酸酯可以为双酚A环氧丙烯酸酯。为了实现充分交联以避免需要使用粘结剂并且提供充分的水氧阻隔作用的目的，所述不饱和丙烯酸酯的重均分子量为5000-100000，优选10000-50000，并且更优选10000-25000。
此外，根据本发明的封装层中的所述有机涂层还可以含有多种功能助剂，例如防雾剂、防反射剂、耐划伤剂等，其在有机涂层中的含量可以根据所需性能适当地选择。所述有机涂层可以是掺杂防雾粒子或表面活性剂的有机涂层，也可以是吸水型防雾有机涂层。掺杂的防雾粒子包括：二氧化钛、氧化锌、纳米二氧化硅、超疏水硅材料、阳/阴/两性离子表面活性剂以及改性的高分子等；吸水型有机涂层包括了高吸水性的多元醇类聚氨酯树脂等。防反射功能通过添加不同折射率的粒子实现防反射，低折射率的涂层主要是通过加入低折射氟化 物、含氟丙烯酸酯类、硅烷改性不饱和丙烯酸酯类聚合物、不饱和聚氨酯丙烯酸酯类聚合物、不饱和含氟丙烯酸酯类聚合物中的一种或多种来实现低折射；高折射率的涂层一般通过在可进行光固化的丙烯酸酯类或者是环氧类涂层中加入无机纳米氧化物如二氧化钛、一氧化钛、针状氧化锌、纳米钛酸铜钙、钛酸锶中的一种或多种等来实现高折射。在有机涂层中加入耐划伤的硬质粒子或者与硬质单体混合成膜，能够提升耐划伤性能。耐划伤剂例如选自玻璃纤维、纤维素类、二氧化硅粒子或含硅粒子、氧化铝粒子、氧化石墨烯、透明石墨、玻璃纤维、金刚石粒子中的一种或多种。在此基础上，通过在所述不饱和丙烯酸酯类有机涂层中添加特定的材料，可以使所述有机涂层305在具有水氧阻隔作用的前提下，同时兼具其它性能，例如防雾性、防反射性、以及耐划伤性等。
可选的，所述不饱和丙烯酸酯类有机涂层中可以添加阳离子表面活性剂。所述阳离子表面活性剂可以选自下列各项中的一种或多种：烷基苯磺酸、烷基内铵盐、丙氨酸、脂肪烷磺酸盐以及其他多元醇脂肪酸盐等。
优选地，所述阳离子表面活性剂包括亲水性季铵盐。所述亲水性季铵盐选自含可固化双键结构的长链季铵盐，如溴代烷丙烯酸乙酯类。
所述亲水性季铵盐优选采用可进行紫外光聚合的季铵盐，该种季铵盐通过加入不同链长的溴代烷和丙烯酸酯进行反应，可以得到不同链长的低分子季铵盐。
基于此，通过向所述不饱和丙烯酸酯类有机涂层中添加所述阳离子表面活性剂，可以有效的提高有机溶液与基材表面的润湿性，使得所述有机溶液能够平铺在所述基材表面，从而消除光线的漫反射，达到防雾的效果。
这里需要说明的是，为了实现所述封装层30的防雾功能，所述不饱和丙烯酸酯类有机涂层中的添加材料不限于所述阳离子表面活性剂，其还可以为其它超亲水性材料、或者超疏水性材料、或者两亲性材料。
可选的，所述不饱和丙烯酸酯类有机涂层可以包括靠近所述封装 阻隔层304的第一涂层和远离所述封装阻隔层304的第二涂层；其中，所述第一涂层的折射率大于所述第二涂层的折射率。
所述第一涂层可以包括硅烷改性不饱和丙烯酸酯类聚合物、不饱和聚氨酯丙烯酸酯类聚合物、不饱和含氟丙烯酸酯类聚合物中的一种或多种；其中，上述各种聚合物可以为单官能度聚合物或者多官能度聚合物，在此不做限定。所述第一涂层的厚度为1-10μm，优选2.5-10μm，并且更优选2.5-7.5μm。
所述第二涂层可以包括掺杂有无机颗粒的不饱和丙烯酸酯类聚合物；具体的，所述第二涂层的材料可以与所述第一涂层的材料相同或者不同，通过向所述第二涂层的材料中添加所述无机颗粒，可使所述第二涂层具有相对较高的折射能力。其中，所述无机颗粒可以包括二氧化钛、一氧化钛、针状氧化锌、纳米钛酸铜钙、钛酸锶中的一种或多种。所述第二涂层的厚度为1-10μm，优选2.5-10μm，并且更优选2.5-7.5μm。为了获得以上所述的使所述第二涂层具有相对较高的折射能力的技术效果，所述无机颗粒的粒径优选20-1000nm，更优选30-500nm并且最优选50-250nm。
基于此，通过将所述不饱和丙烯酸酯类有机涂层设置为分别具有高折射率和低折射率的两层涂层，可以改善所述封装层30的反光效果，使其具有低反射性甚至防反射性。
可选的，所述不饱和丙烯酸酯类有机涂层还可以包括掺杂有硬质颗粒的不饱和丙烯酸酯类有机涂层；其中，所述硬质颗粒具体可以包括氧化石墨烯、透明石墨、玻璃纤维、金刚石粒子中的一种或多种。
这里，所述硬质颗粒具有相对较高的硬度，通过在所述不饱和丙烯酸酯类有机涂层中掺杂上述的硬质颗粒，可以有效的提高所述封装层30的耐划伤性能。
具体地，根据本发明的用于封装层的有机涂层可以从下列组合物制备，所述组合物包含不饱和丙烯酸酯、添加剂以及溶剂。所述不饱和丙烯酸酯优选为聚氨酯丙烯酸酯或环氧丙烯酸酯。基于所述组合物的总重量，所述不饱和丙烯酸酯的含量为10-85重量％，优选20-60重量％，更优选20-40重量％。
所述不饱和丙烯酸酯可以选自本领域中通常用于在通过紫外光、 可见光、热、化学反应等方式进行固化时形成膜层的不饱和丙烯酸酯，其具体实例包括：丙烯酸羟乙酯、氨基丙烯酸酯、环氧丙烯酸酯、脂环族环氧甲基丙烯酸酯类、甲基丙烯酸甲酯等。优选地，所述不饱和丙烯酸酯为聚氨酯丙烯酸酯或者环氧丙烯酸酯。所述聚氨酯丙烯酸酯可以选自下列各项中的一种或多种：氨基甲酸酯丙烯酸酯、有机硅-丙烯酸酯改性聚氨酯、环氧改性聚氨酯丙烯酸酯、脂肪族改性聚氨酯丙烯酸酯类等。所述环氧丙烯酸酯可以为双酚A环氧丙烯酸酯。为了实现充分交联以避免需要使用粘结剂并且提供充分的水氧阻隔作用的目的，所述不饱和丙烯酸酯的重均分子量为5000-100000，优选10000-50000，并且更优选10000-25000。
此外，根据本发明的封装层中的所述有机涂层还可以含有多种功能助剂，例如防雾剂、防反射剂、耐划伤剂等，其在有机涂层中的含量可以根据所需性能适当地选择。所述有机涂层可以是掺杂防雾粒子或表面活性剂的有机涂层，也可以是吸水型防雾有机涂层。掺杂的防雾粒子包括：二氧化钛、氧化锌、纳米二氧化硅、超疏水硅材料、阳/阴/两性离子表面活性剂以及改性的高分子等；吸水型有机涂层包括了高吸水性的多元醇类聚氨酯树脂等。防反射功能通过添加不同折射率的粒子实现防反射，低折射率的涂层主要是通过加入低折射氟化物、含氟丙烯酸酯类、硅烷改性不饱和丙烯酸酯类聚合物、不饱和聚氨酯丙烯酸酯类聚合物、不饱和含氟丙烯酸酯类聚合物中的一种或多种来实现低折射；高折射率的涂层一般通过在可进行光固化的丙烯酸酯类或者是环氧类涂层中加入无机纳米氧化物如二氧化钛、一氧化钛、针状氧化锌、纳米钛酸铜钙、钛酸锶中的一种或多种等来实现高折射。在有机涂层中加入耐划伤的硬质粒子或者与硬质单体混合成膜，能够提升耐划伤性能。耐划伤剂例如选自玻璃纤维、纤维素类、二氧化硅粒子或含硅粒子、氧化铝粒子、氧化石墨烯、透明石墨、玻璃纤维、金刚石粒子中的一种或多种。在此基础上，通过在所述不饱和丙烯酸酯类有机涂层中添加特定的材料，可以使所述有机涂层305在具有水氧阻隔作用的前提下，同时兼具其它性能，例如防雾性、防反射性、以及耐划伤性等。
本发明的实施例还提供一种电子封装器件，如图3所示，包括衬底基板10和封装层30，以及位于二者之间的电子器件20；其中，所 述封装层30为上述实施例提供的封装层。
具体的，所述电子封装器件可以包括OLED显示器件、CCD器件、电子纸、智能标签和智能卡，且不限于此。
由于所述电子封装器件的核心部件(即所述电子器件20)对于大气环境中的水分和氧气十分敏感，为了保证所述电子器件20的正常工作，需要对其进行封装，从而延长其使用寿命。
基于此，通过采用本发明的实施例提供的所述封装层30对所述电子器件20进行封装，不仅可以保证其具有良好的水氧隔绝效果，同时还可以实现所述电子封装器件的轻薄化。
在此基础上，参考图3所示，所述电子封装器件可以为OLED显示器件，所述电子器件20可以为所述衬底基板10和所述封装层30之间的有机材料功能层20；其中，所述封装层30的封装阻隔层304靠近所述衬底基板10，所述封装层30的有机涂层305远离所述衬底基板10。
需要说明的是，第一，在所述电子封装器件为所述OLED显示器件情况下，所述衬底基板10可以采用玻璃基板或者柔性衬底基板，在此不做具体限定。
第二，所述OLED显示器件根据其驱动方式可以划分为图3所示的无源驱动OLED显示器件和图4所示的有源驱动OLED显示器件。其中，在所述OLED显示器件的驱动方式为有源驱动的情况下，所述OLED显示器件还可以包括位于所述衬底基板10和所述有机材料功能层20之间的薄膜晶体管40，用于对所述OLED显示器件的每个发光单元进行驱动。
第三，在形成所述封装层30的过程中，可以在所述有机材料功能层20的上方形成所述封装阻隔层304，并在所述封装阻隔层304的表面形成所述有机涂层305。其中，所述封装阻隔层304可以包括无机钝化层301或者封装薄膜302。
本发明的实施例提供的所述OLED显示器件，通过在所述有机材料功能层20的表面沉积一层封装阻隔层304，并在所述封装阻隔层304的表面涂覆一层固化成膜的有机涂层305，便可以在保证所述 封装层30的水氧阻隔效果的前提下，有效的减小所述OLED显示器件的厚度，从而实现所述OLED显示器件的轻薄化。
基于上述描述，所述封装阻隔层304优选采用多层交叠的封装薄膜302，例如交替沉积的有机薄膜和无机薄膜。
这里，所述封装薄膜302相比于所述无机钝化层301具有更好的水氧阻隔效果。
在此基础上，所述衬底基板10优选采用柔性衬底基板；其中，所述柔性衬底基板10可以包括聚酰亚胺(Polyimide，简称PI)衬底基板、聚乙烯(polyethylene，简称PE)衬底基板、聚丙烯(Polypropylene，简称PP)衬底基板、聚苯乙烯(Polystyrene，简称PS)衬底基板、聚对苯二甲酸乙二醇酯(Polyethylene Terephthalate，简称PET)衬底基板、以及聚萘二甲酸乙二醇酯(Polyethylene Naphthalate，简称PEN)衬底基板中的任意一种。
这样，所述OLED显示器件即为柔性OLED显示器件。
基于此，当所述封装层30应用于柔性OLED显示器件时，器件厚度的减小可以使所述柔性OLED显示器件的内部应力有效的降低，从而改善弯曲裂纹的出现和各层分离不良的现象，提高所述OLED显示器件的弯曲性能。
这里，所述OLED显示器件优选采用柔性衬底基板10和本发明的实施例提供的所述封装层30，以及位于二者之间的有机材料功能层20，从而形成柔性OLED显示器件；所述柔性OLED显示器件的曲面显示特性可以为用户提供一种全新的视觉体验。
在此基础上，通过调整所述封装层30中的有机涂层305的成份，还可以使所述OLED显示器件具有防雾、低反射、耐划伤等性能，从而可以扩展其应用领域，同时改善其显示效果。
具体的，所述有机涂层305的成份及其能够达到的效果可以参见本发明的实施例提供的所述封装层30部分的介绍，这里不再赘述。
本发明的实施例提供的所述OLED显示器件的发光方式可以为顶发射或者底发射，当然也可以为双面发射，在此不做限定。其中，所述顶发射是指发光方向背离所述衬底基板10一侧，所述底发射是 指发光方向指向所述衬底基板10一侧，所述双面发射包括以上两种情况。
示例的，在所述OLED显示器件为柔性顶发射型显示器件的情况下，本发明的实施例提供的所述封装层30可以有效的阻隔大气环境中的水分和氧气进入所述OLED显示器件的内部，从而可以改善所述柔性顶发射型显示器件的发光性能，并延长器使用寿命。
本发明的实施例还提供一种显示装置，所述显示装置包括上述的电子封装器件。
这里，所述显示装置具体可以包括显示器、手机、数码相机等具有显示功能的装置，在此不做具体限定。
下面提供一具体的实施例对所述OLED显示器件的制备过程进行说明。其中，参考图4所示，所述OLED显示器件可以包括柔性衬底基板10、位于所述柔性衬底基板10上方的薄膜晶体管40，位于所述薄膜晶体管40上方的有机材料功能层20、位于所述有机材料功能层20上方的封装阻隔层304、以及位于所述封装阻隔层304上方的有机涂层305。
具体的，如图5所示，所述OLED显示器件的制备过程可以包括以下步骤：
S1、提供柔性衬底基板10。
这里，所述柔性衬底基板10优选采用PI基板，所述PI基板的厚度约为10μm。
S2、在所述柔性衬底基板10的上方形成阵列排布的多个薄膜晶体管40。
其中，所述薄膜晶体管可以依次包括栅极、位于所述栅极上方的栅绝缘层、位于所述栅绝缘层上方的半导体有源层、以及位于所述半导体有源层上方且同层的源极和漏极。
这里，所述薄膜晶体管40可以组成所述OLED显示器件的有源驱动控制层，其厚度约为4μm。
S3、在所述薄膜晶体管40的上方通过蒸镀形成有机材料功能层 20。
其中，所述有机材料功能层20具体可以包括红色发光单元、绿色发光单元和蓝色发光单元，且所述发光单元可以与所述薄膜晶体管40一一对应。
这里，所述有机材料功能层20的厚度约为500nm。
S4、在所述有机材料功能层20的上方通过溅射形成封装阻隔层304。
其中，所述封装阻隔层304的材料可以采用无机钝化材料例如氮化硅，所述氮化硅的厚度约为1μm。
S5、在所述封装阻隔层304的上方涂覆一层有机溶液，并使所述有机溶液通过紫外光固化的方式形成有机涂层305。
其中，所述有机溶液的涂覆方式可以包括旋涂、喷涂、平板刮膜、喷墨打印、狭缝涂布中的任意一种；所形成的有机涂层305的厚度可以与所述PI基板的厚底相当，约为10μm。
具体的，所述有机涂层305优选采用上述兼具水氧阻隔性、防雾性、低反射性、以及耐划伤性的有机涂层。
通过上述步骤S1-S5，即可形成柔性OLED显示器件；所述柔性OLED显示器件不仅具有轻薄化的特点，同时还具有阻隔水氧、防雾、低反射、以及耐划伤等优良特性，能够有效的提升所述OLED显示器件的显示效果。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (12)

  1. 一种封装层，其特征在于，包括封装阻隔层和直接在所述封装阻隔层上形成的有机涂层；
    其中，所述有机涂层为可聚合型有机涂层；
    所述可聚合型有机涂层包括不饱和丙烯酸酯类有机涂层。
  2. 根据权利要求1所述的封装层，其特征在于，所述有机涂层的厚度为5μm～10μm。
  3. 根据权利要求1所述的封装层，其特征在于，所述不饱和丙烯酸酯类有机涂层包括聚氨酯丙烯酸酯类有机涂层或者环氧丙烯酸酯类有机涂层。
  4. 根据权利要求3所述的封装层，其特征在于，所述不饱和丙烯酸酯类有机涂层中添加有阳离子表面活性剂；
    其中，所述阳离子表面活性剂包括亲水性季铵盐。
  5. 根据权利要求3所述的封装层，其特征在于，所述不饱和丙烯酸酯类有机涂层包括靠近所述封装阻隔层的第一涂层和远离所述封装阻隔层的第二涂层；
    其中，所述第一涂层的折射率大于所述第二涂层的折射率。
  6. 根据权利要求5所述的封装层，其特征在于，所述第一涂层包括硅烷改性不饱和丙烯酸酯类聚合物、不饱和聚氨酯丙烯酸酯类聚合物、不饱和含氟丙烯酸酯类聚合物中的一种或多种；
    所述第二涂层包括掺杂有无机颗粒的不饱和丙烯酸酯类聚合物；所述无机颗粒包括二氧化钛、一氧化钛、氧化锌、钛酸铜钙、钛酸锶颗粒中的一种或多种。
  7. 根据权利要求3所述的封装层，其特征在于，所述不饱和丙烯酸酯类有机涂层包括掺杂有硬质颗粒的不饱和丙烯酸酯类有机涂层；
    其中，所述硬质颗粒包括氧化石墨烯、透明石墨、玻璃纤维、金刚石粒子中的一种或多种。
  8. 根据权利要求1至7任一项所述的封装层，其特征在于，所述封装阻隔层包括多层交叠的封装薄膜。
  9. 一种电子封装器件，包括衬底基板和封装层，以及位于二者之间的电子器件；其特征在于，所述封装层为权利要求1至8任一项所述的封装层。
  10. 根据权利要求9所述的电子封装器件，其特征在于，所述电子封装器件为OLED显示器件，所述电子器件为所述衬底基板和所述封装层之间的有机材料功能层；
    其中，所述封装层的封装阻隔层靠近所述衬底基板，所述封装层的有机涂层远离所述衬底基板。
  11. 根据权利要求9或10所述的电子封装器件，其特征在于，所述衬底基板为柔性衬底基板；
    其中，所述柔性衬底基板包括聚酰亚胺衬底基板、聚乙烯衬底基板、聚丙烯衬底基板、聚苯乙烯衬底基板、聚对苯二甲酸乙二醇酯衬底基板、聚萘二甲酸乙二醇酯衬底基板中的任意一种。
  12. 一种显示装置，其特征在于，所述显示装置包括权利要求9-11任一项所述的电子封装器件。
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