WO2020077730A1 - 光刻胶及其制备方法 - Google Patents

光刻胶及其制备方法 Download PDF

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WO2020077730A1
WO2020077730A1 PCT/CN2018/116306 CN2018116306W WO2020077730A1 WO 2020077730 A1 WO2020077730 A1 WO 2020077730A1 CN 2018116306 W CN2018116306 W CN 2018116306W WO 2020077730 A1 WO2020077730 A1 WO 2020077730A1
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molecule
biimidazole
nitrogen
photoresist
necked flask
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PCT/CN2018/116306
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English (en)
French (fr)
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龚文亮
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武汉华星光电半导体显示技术有限公司
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Priority to US16/349,269 priority Critical patent/US11409195B2/en
Publication of WO2020077730A1 publication Critical patent/WO2020077730A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/004—Photosensitive materials
    • G03F7/039—Macromolecular compounds which are photodegradable, e.g. positive electron resists
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
    • C08G18/3819—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen
    • C08G18/3842—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen containing heterocyclic rings having at least one nitrogen atom in the ring
    • C08G18/3848—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen containing heterocyclic rings having at least one nitrogen atom in the ring containing two nitrogen atoms in the ring
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/02—Polyamines
    • C08G73/0273—Polyamines containing heterocyclic moieties in the main chain
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C08G73/08—Polyhydrazides; Polytriazoles; Polyaminotriazoles; Polyoxadiazoles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C08G73/18—Polybenzimidazoles
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/0005—Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
    • G03F7/0007—Filters, e.g. additive colour filters; Components for display devices
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/26—Processing photosensitive materials; Apparatus therefor
    • G03F7/40—Treatment after imagewise removal, e.g. baking

Definitions

  • the invention relates to display technology, in particular to a photoresist and a preparation method thereof.
  • display products usually add a layer of polarizer (POL) on the display panel to improve the contrast.
  • POL polarizer
  • the polarizer directly loses more than 55% of the light output of the panel;
  • the material of the polarizer is mainly polyvinyl alcohol (PVA), which has a large thickness ( ⁇ 100 ⁇ m) and a brittle texture, which is easy to bend during the bending process Fracture occurred in the middle, which is not suitable for dynamic bending display products.
  • PVA polyvinyl alcohol
  • Photoresist is divided into positive photoresist and negative photoresist.
  • the pattern will swell when immersed in the solvent, so the pattern resolution of the negative photoresist is lower than that of the positive photoresist technology. For this reason, positive photoresists have replaced negative photoresists as the core of advanced semiconductor manufacturing.
  • hexaarylbiimidazole is a novel photochromic material. Its special feature is that the light can break the CN bond between two molecules of triphenylimidazole, generating two molecules of free radicals.
  • the formula is as follows:
  • the mechanism of light-induced discoloration of biimidazole can be understood as that light breaks the chemical bond between imidazole molecules, which coincides with the principle of photolithography.
  • the present invention proposes a new photoresist and its preparation method to solve the problems in the prior art.
  • the object of the present invention is to provide a photoresist and a preparation method thereof.
  • the photoresist can make the pattern obtained by the photolithography technology have high resolution, and can improve the yield and life of the OLED panel.
  • the invention also provides a photoresist, which is formed by a crosslinking polymerization reaction between a biimidazole molecule containing a reactive group and a nitrogen-containing compound, wherein the photoresist is After development, it is baked and cured at a temperature lower than 90 ° C.
  • the reactive group-containing biimidazole molecule is an alkynyl-containing biimidazole molecule, and the nitrogen-containing compound is azidohexane.
  • the reactive group-containing biimidazole molecule is an ethylene oxide-containing biimidazole molecule, and the nitrogen-containing compound is hexamethylenediamine.
  • the reactive group-containing biimidazole molecule is a hydroxyl-containing biimidazole molecule
  • the nitrogen-containing compound is 1,6-hexanediisocyanate
  • the invention also provides a photoresist, which is formed by a crosslinking polymerization reaction between a biimidazole molecule containing a reactive group and a nitrogen-containing compound.
  • the reactive group-containing biimidazole molecule is an alkynyl-containing biimidazole molecule, and the nitrogen-containing compound is azidohexane.
  • the reactive group-containing biimidazole molecule is an ethylene oxide-containing biimidazole molecule, and the nitrogen-containing compound is hexamethylenediamine.
  • the reactive group-containing biimidazole molecule is a hydroxyl-containing biimidazole molecule
  • the nitrogen-containing compound is 1,6-hexanediisocyanate
  • the photoresist is baked and cured at a temperature lower than 90 ° C after being developed.
  • the present invention also provides a method for preparing a photoresist, which includes the following steps: crosslinking a biimidazole molecule containing a reactive group with a nitrogen-containing compound.
  • the reactive group-containing biimidazole molecule is an alkynyl-containing biimidazole molecule, and the nitrogen-containing compound is azidohexane,
  • the method includes the following steps:
  • the reactive group-containing biimidazole molecule is an ethylene oxide-containing biimidazole molecule, and the nitrogen-containing compound is hexamethylenediamine,
  • the method includes the following steps:
  • the reactive group-containing biimidazole molecule is a hydroxyl-containing biimidazole molecule
  • the nitrogen-containing compound is 1,6-hexanediisocyanate
  • the method includes the following steps:
  • the photoresist is baked and cured at a temperature lower than 90 ° C after being developed.
  • the present invention uses a hexaarylbiimidazole crosslinked polymer as a positive photoresist, which can make the pattern obtained by the photolithography technology have high resolution.
  • the hexaarylbiimidazole crosslinked polymer of the present invention is used as a positive photoresist, it is applied to the depolarizer technology of OLED panels, the photoresist can be developed at It is baked and cured at a temperature, which avoids the destruction of the OLED light-emitting layer at high temperature to the greatest extent (the baking temperature of the conventional color film photoresist is 220 ° C), which improves the yield and life of the OLED panel.
  • FIG. 1 is a schematic reaction diagram of a method for preparing a photoresist according to the first embodiment of the present invention.
  • FIG. 2 is a reaction schematic diagram of a method for preparing a photoresist according to the second embodiment of the present invention.
  • FIG. 3 is a schematic reaction diagram of a method for preparing a photoresist according to the present invention.
  • click reaction has the characteristics of high conversion rate, no side reaction, low temperature and so on. Therefore, click reaction occupies an important position in organic synthesis and polymer compound synthesis.
  • the reaction mechanism of click chemistry between alkynyl and azide is as follows:
  • Figure 1 shows the formation mechanism of this cross-linked polymer. Specifically, the preparation method includes the following steps:
  • Ethylene oxide can react gently with amines at room temperature to form ethanolamine compounds.
  • the reaction mechanism is as follows:
  • the inventors conceived a method for preparing hexaarylbiimidazole positive photoresist using tetraethylene oxide-substituted hexaarylbiimidazole and hexamethylenediamine.
  • Figure 2 shows the formation mechanism of this cross-linked polymer. Specifically, the preparation method includes the following steps:
  • Alcohol compounds can react with isocyanate to form polyurethane, the reaction mechanism is as follows:
  • the inventors conceived a method for preparing hexaarylbiimidazole positive photoresist using tetrahydroxy-substituted hexaarylbiimidazole and 1,6-hexanediisocyanate.
  • Figure 3 shows the formation mechanism of this cross-linked polymer. Specifically, the preparation method includes the following steps:
  • the present invention uses a hexaarylbiimidazole crosslinked polymer as a positive photoresist, which can make the pattern obtained by the photolithography technology have high resolution.
  • the light-emitting layer of the OLED panel cannot withstand the high-temperature baking temperature (generally should be ⁇ 100 ° C), otherwise it will cause the light-emitting unit of the OLED panel to fail or shorten its life; however, when using the hexaarylbiimidazole crosslinking polymerization When the object is used as a positive photoresist, it is applied to the depolarizer technology of the OLED panel.
  • the photoresist can be baked and cured at a temperature lower than 90 °C after being developed, to avoid the high temperature
  • the destruction of the OLED light-emitting layer (the baking temperature of the conventional color film photoresist is 220 ° C) has improved the yield and life of the OLED panel.

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Materials For Photolithography (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)

Abstract

一种光刻胶，该光刻胶是由含反应基团的联咪唑分子与含氮的化合物发生交联聚合反应所形成。

Description

光刻胶及其制备方法 技术领域
本发明涉及显示技术，特别涉及一种光刻胶及其制备方法。
背景技术
显示产品为了解决室外强光照射下的对比度低下的问题，通常在显示面板上增加一层偏光片(polarizer，POL)来提高对比度。但是，一方面，偏光片直接损失了面板超过55％的出光；另一方面，偏光片的材质主要是聚乙烯醇(PVA)，其厚度大(～100μm)、质地脆，很容易在弯曲过程中发生断裂，不适用于动态弯折显示产品。通过在有机发光二极管(organic light emitting diode，OLED)显示器的每一个子像素单元(R,G,B sub-pixel)上贴合对应色阻或光刻胶(R,G,B photoresist)，可保证发光层(emitting layer，EL)的光谱的有效输出(＞60％)；同时在非发光区域填充黑色矩阵(black matrix)可有效地降低面板的反射率(＜6％)，这一技术被称为去偏光片技术(POL-less)。
光刻胶分为正性光刻胶和负性光刻胶。负性光刻胶于显影过程中，图案经过溶剂的浸泡会存在溶胀的现象，因此负性光刻胶的图案分辨率相对于正性光刻技术来得低。基于此原因，正性光刻胶已经取代负性光刻胶作为先进半导体制造的核心。
其中，六芳基联咪唑是新颖的光致变色材料，其特殊之处在于光照能够打断两分子三苯基咪唑之间的C-N键，产生两分子自由基，其光致变色的化学反应通式如下所示：
Figure PCTCN2018116306-appb-000001
联咪唑的光诱导变色机理可以理解为光破坏了咪唑分子之间的化学键，而这与光刻技术的原理不谋而合。
然而，目前没有关于联咪唑聚合物作为光刻胶的相关报道。
因此，本发明提出一种新的光刻胶及其制备方法，以解决现有技术所存在的问题。
技术问题
本发明的目的在于提供一种光刻胶及其制备方法，所述光刻胶可使得藉由光刻技术所得到的图案具有高分辨率，并可提升OLED面板的良率与寿命。
技术解决方案
为了达到上述目的，发明还提供一种光刻胶，所述光刻胶是由含反应基团的联咪唑分子与含氮的化合物发生交联聚合反应所形成，其中所述光刻胶在被显影后于低于90℃的温度下被烘烤而固化。
在本发明一实施例中，所述含反应基团的联咪唑分子是含炔基的联咪唑分子，所述含氮的化合物是叠氮己烷。
在本发明一实施例中，所述含反应基团的联咪唑分子是含环氧乙烷的联咪唑分子，所述含氮的化合物是己二胺。
在本发明一实施例中，所述含反应基团的联咪唑分子是含羟基的联咪唑分子，所述含氮的化合物是1,6-己二异氰酸酯。
本发明还提供一种光刻胶，所述光刻胶是由含反应基团的联咪唑分子与含氮的化合物发生交联聚合反应所形成。
在本发明一实施例中，所述含反应基团的联咪唑分子是含炔基的联咪唑分子，所述含氮的化合物是叠氮己烷。
在本发明一实施例中，所述含反应基团的联咪唑分子是含环氧乙烷的联咪唑分子，所述含氮的化合物是己二胺。
在本发明一实施例中，所述含反应基团的联咪唑分子是含羟基的联咪唑分子，所述含氮的化合物是1,6-己二异氰酸酯。
在本发明一实施例中，所述光刻胶在被显影后于低于90℃的温度下被烘烤而固化。
本发明还提供一种制备光刻胶的方法，包括以下步骤：使含反应基团的联咪唑分子与含氮的化合物发生交联反应。
在本发明一实施例中，所述含反应基团的联咪唑分子是含炔基的联咪唑分子，所述含氮的化合物是叠氮己烷，
所述方法包括以下步骤：
(S11)在100ml的单口烧瓶中，按照摩尔量1:1.1的比例，称取含炔基的联咪唑分子和叠氮己烷，溶解在二甲基甲酰胺中，以获得均一混合溶液；
(S12)将单口烧瓶置于液氮下，连结油泵，减压抽真空除去混合溶液中的气泡，然后对混合溶液鼓入氮气；
(S13)反复操作步骤(S12)三次；
(S14)将溴化亚铜，按照摩尔量10％，加入到混合溶液中(液氮 中，77K)，提起单口烧瓶，置于室温下，迅速搅拌；
(S15)数分钟后，流动液体发生交联聚合反应而变黏稠，直至完全固化。
在本发明一实施例中，所述含反应基团的联咪唑分子是含环氧乙烷的联咪唑分子，所述含氮的化合物是己二胺，
所述方法包括以下步骤：
(S21)在100ml的单口烧瓶中，按照摩尔量1:1.2的比例，称取含环氧乙烷的联咪唑分子和己二胺，溶解在二甲基甲酰胺中，以获得均一混合溶液；
(S22)将单口烧瓶置于液氮下，连结油泵，减压抽真空除去混合溶液中的气泡，然后对混合溶液鼓入氮气；
(S23)反复操作步骤(S22)三次；
(S24)将单口烧瓶取出，置于50℃油浴下加热6小时；
(S25)取出单口烧瓶，流动液体发生交联聚合反应而变为固体。
在本发明一实施例中，所述含反应基团的联咪唑分子是含羟基的联咪唑分子，所述含氮的化合物是1,6-己二异氰酸酯，
所述方法包括以下步骤：
(S31)在100ml的单口烧瓶中，按照摩尔量1:1.2的比例，称取含羟基的联咪唑分子和1,6-己二异氰酸酯，溶解在二甲基甲酰胺中，以获得均一混合溶液；
(S32)将单口烧瓶置于液氮下，连结油泵，减压抽真空除去混合溶液中的气泡，然后对混合溶液鼓入氮气；
(S33)反复操作步骤(S32)三次；
(S34)将单口烧瓶取出，置于50℃油浴下加热6小时；
(S35)取出单口烧瓶，流动液体发生交联聚合反应而变为固体。
在本发明一实施例中，所述光刻胶在被显影后于低于90℃的温度下被烘烤而固化。
有益效果
相较于现有技术，本发明利用六芳基联咪唑交联聚合物作为正性光刻胶，这可使得通过光刻技术所得到的图案具有高分辨率。此外，当使用本发明的六芳基联咪唑交联聚合物作为正性光刻胶时，将其应用于OLED面板的去偏光片技术，光刻胶可在被显影后于低于90℃的温度下被烘烤而固化，最大程度地避免了高温对OLED发光层的破坏(传统方案的彩膜光阻的烘烤温度在220℃)，提升了OLED面板的良率与寿命。
附图说明
图1为根据本发明的实施利一的一种制备光刻胶的方法的反应示意图。
图2为根据本发明的实施利二的一种制备光刻胶的方法的反应示意图。
图3为根据本发明的实施利三的一种制备光刻胶的方法的反应示意图。
本发明的实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以 实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。在图中，结构相似的单元是以相同标号表示。
本发明提出一种光刻胶，所述光刻胶是由含反应基团的联咪唑分子与含氮的化合物发生交联聚合反应所形成。本发明还提出一种制备光刻胶的方法，包括以下步骤：使含反应基团的联咪唑分子与含氮的化合物发生交联反应。
实施例一
点击反应具有高转化率、无副反应、低温等特点，因此点击反应在有机合成和高分子化合物合成占据着重要的地位，其中炔基与叠氮之间的点击化学的反应机理如下所示：
Figure PCTCN2018116306-appb-000002
因此，发明人设想出使用四炔基取代的六芳基联咪唑与叠氮己烷来制备六芳基联咪唑正性光刻胶的方法。图1显示此交联聚合物的形成机理。具体来说，所述制备方法包括以下步骤：
(S11)在100ml的单口烧瓶中，按照摩尔量1:1.1的比例，称取含炔基的联咪唑分子和叠氮己烷，溶解在二甲基甲酰胺(DMF) 中，以获得均一混合溶液；
(S12)将单口烧瓶置于液氮下，连结油泵，减压抽真空除去混合溶液中的气泡，然后对混合溶液鼓入氮气；
(S13)反复操作步骤(S12)三次；
(S14)将溴化亚铜，按照摩尔量10％，加入到混合溶液中(液氮中，77K)，提起单口烧瓶，置于室温下，迅速搅拌；
(S15)数分钟后，流动液体发生交联聚合反应而变黏稠，直至完全固化。
实施例二
环氧乙烷可以与胺类在室温下温和地反应形成乙醇胺类化合物，其反应机理如下所示：
Figure PCTCN2018116306-appb-000003
因此，发明人设想出使用四环氧乙烷基取代的六芳基联咪唑与己二胺来制备六芳基联咪唑正性光刻胶的方法。图2显示此交联聚合物的形成机理。具体来说，所述制备方法包括以下步骤：
(S21)在100ml的单口烧瓶中，按照摩尔量1:1.2的比例，称取含环氧乙烷的联咪唑分子和己二胺，溶解在二甲基甲酰胺(DMF) 中，以获得均一混合溶液；
(S22)将单口烧瓶置于液氮下，连结油泵，减压抽真空除去混合溶液中的气泡，然后对混合溶液鼓入氮气；
(S23)反复操作步骤(S22)三次；
(S24)将单口烧瓶取出，置于50℃油浴下加热6小时；
(S25)取出单口烧瓶，流动液体发生交联聚合反应而变为固体。
实施例三
醇类化合物可以与异氰酸酯发生反应形成聚氨酯，其反应机理如下所示：
Figure PCTCN2018116306-appb-000004
因此，发明人设想出使用四羟基取代的六芳基联咪唑与1,6-己二异氰酸酯来制备六芳基联咪唑正性光刻胶的方法。图3显示此交联聚合物的形成机理。具体来说，所述制备方法包括以下步骤：
(S31)在100ml的单口烧瓶中，按照摩尔量1:1.2的比例，称取含羟基的联咪唑分子和1,6-己二异氰酸酯，溶解在二甲基甲酰胺(DMF)中，以获得均一混合溶液；
(S32)将单口烧瓶置于液氮下，连结油泵，减压抽真空除去混合溶液中的气泡，然后对混合溶液鼓入氮气；
(S33)反复操作步骤(S32)三次；
(S34)将单口烧瓶取出，置于50℃油浴下加热6小时；
(S35)取出单口烧瓶，流动液体发生交联聚合反应而变为固体。
相较于现有技术，本发明利用六芳基联咪唑交联聚合物作为正性光刻胶，这可使得通过光刻技术所得到的图案具有高分辨率。此外，OLED面板的发光层不能承受高温的烘烤温度(一般应＜100℃)，不然会导致OLED面板的发光单元失效或寿命缩短；然而，当使用本发明的六芳基联咪唑交联聚合物作为正性光刻胶时，将其应用于OLED面板的去偏光片技术，光刻胶可在被显影后于低于90℃的温度下被烘烤而固化，最大程度地避免了高温对OLED发光层的破坏(传统方案的彩膜光阻的烘烤温度在220℃)，提升了OLED面板的良率与寿命。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (14)

  1. 一种光刻胶，所述光刻胶是由含反应基团的联咪唑分子与含氮的化合物发生交联聚合反应所形成，
    其中所述光刻胶在被显影后于低于90℃的温度下被烘烤而固化。
  2. 如权利要求1所述的光刻胶，其中所述含反应基团的联咪唑分子是含炔基的联咪唑分子，所述含氮的化合物是叠氮己烷。
  3. 如权利要求1所述的光刻胶，其中所述含反应基团的联咪唑分子是含环氧乙烷的联咪唑分子，所述含氮的化合物是己二胺。
  4. 如权利要求1所述的光刻胶，其中所述含反应基团的联咪唑分子是含羟基的联咪唑分子，所述含氮的化合物是1,6-己二异氰酸酯。
  5. 一种光刻胶，所述光刻胶是由含反应基团的联咪唑分子与含氮的化合物发生交联聚合反应所形成。
  6. 如权利要求5所述的光刻胶，其中所述含反应基团的联咪唑分子是含炔基的联咪唑分子，所述含氮的化合物是叠氮己烷。
  7. 如权利要求5所述的光刻胶，其中所述含反应基团的联咪唑分子是含环氧乙烷的联咪唑分子，所述含氮的化合物是己二胺。
  8. 如权利要求5所述的光刻胶，其中所述含反应基团的联咪唑分子是含羟基的联咪唑分子，所述含氮的化合物是1,6-己二异氰酸酯。
  9. 如权利要求5所述的光刻胶，其中所述光刻胶在被显影后于低于90℃的温度下被烘烤而固化。
  10. 一种制备光刻胶的方法，包括以下步骤：使含反应基团的联咪唑分子与含氮的化合物发生交联反应。
  11. 如权利要求10所述的制备光刻胶的方法，其中所述含反应基团的联咪唑分子是含炔基的联咪唑分子，所述含氮的化合物是叠氮己烷，
    所述方法包括以下步骤：
    (S11)在100ml的单口烧瓶中，按照摩尔量1:1.1的比例，称取含炔基的联咪唑分子和叠氮己烷，溶解在二甲基甲酰胺中，以获得均一混合溶液；
    (S12)将单口烧瓶置于液氮下，连结油泵，减压抽真空除去混合溶液中的气泡，然后对混合溶液鼓入氮气；
    (S13)反复操作步骤(S12)三次；
    (S14)将溴化亚铜，按照摩尔量10％，加入到混合溶液中(液氮中，77K)，提起单口烧瓶，置于室温下，迅速搅拌；
    (S15)数分钟后，流动液体发生交联聚合反应而变黏稠，直至完全固化。
  12. 如权利要求10所述的制备光刻胶的方法，其中所述含反应基团的联咪唑分子是含环氧乙烷的联咪唑分子，所述含氮的化合物是己二胺，
    所述方法包括以下步骤：
    (S21)在100ml的单口烧瓶中，按照摩尔量1:1.2的比例，称取含环氧乙烷的联咪唑分子和己二胺，溶解在二甲基甲酰胺中，以获得均一混合溶液；
    (S22)将单口烧瓶置于液氮下，连结油泵，减压抽真空除去 混合溶液中的气泡，然后对混合溶液鼓入氮气；
    (S23)反复操作步骤(S22)三次；
    (S24)将单口烧瓶取出，置于50℃油浴下加热6小时；
    (S25)取出单口烧瓶，流动液体发生交联聚合反应而变为固体。
  13. 如权利要求10所述的制备光刻胶的方法，其中所述含反应基团的联咪唑分子是含羟基的联咪唑分子，所述含氮的化合物是1,6-己二异氰酸酯，
    所述方法包括以下步骤：
    (S31)在100ml的单口烧瓶中，按照摩尔量1:1.2的比例，称取含羟基的联咪唑分子和1,6-己二异氰酸酯，溶解在二甲基甲酰胺中，以获得均一混合溶液；
    (S32)将单口烧瓶置于液氮下，连结油泵，减压抽真空除去混合溶液中的气泡，然后对混合溶液鼓入氮气；
    (S33)反复操作步骤(S32)三次；
    (S34)将单口烧瓶取出，置于50℃油浴下加热6小时；
    (S35)取出单口烧瓶，流动液体发生交联聚合反应而变为固体。
  14. 如权利要求10所述的制备光刻胶的方法，其中所述光刻胶在被显影后于低于90℃的温度下被烘烤而固化。
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