WO2016023253A1 - 曝光方法及曝光机 - Google Patents

曝光方法及曝光机 Download PDF

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Publication number
WO2016023253A1
WO2016023253A1 PCT/CN2014/085902 CN2014085902W WO2016023253A1 WO 2016023253 A1 WO2016023253 A1 WO 2016023253A1 CN 2014085902 W CN2014085902 W CN 2014085902W WO 2016023253 A1 WO2016023253 A1 WO 2016023253A1
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Prior art keywords
exposure
photoresist
substrate
exposed
region
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PCT/CN2014/085902
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English (en)
French (fr)
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宋江江
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深圳市华星光电技术有限公司
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Priority to US14/416,317 priority Critical patent/US20170307981A1/en
Publication of WO2016023253A1 publication Critical patent/WO2016023253A1/zh

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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03FPHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/20Exposure; Apparatus therefor
    • G03F7/2045Exposure; Apparatus therefor using originals with apertures, e.g. stencil exposure masks
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03FPHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/0005Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
    • G03F7/0007Filters, e.g. additive colour filters; Components for display devices
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03FPHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/004Photosensitive materials
    • G03F7/038Macromolecular compounds which are rendered insoluble or differentially wettable
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03FPHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/004Photosensitive materials
    • G03F7/039Macromolecular compounds which are photodegradable, e.g. positive electron resists
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03FPHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/20Exposure; Apparatus therefor
    • G03F7/2022Multi-step exposure, e.g. hybrid; backside exposure; blanket exposure, e.g. for image reversal; edge exposure, e.g. for edge bead removal; corrective exposure
    • G03F7/203Multi-step exposure, e.g. hybrid; backside exposure; blanket exposure, e.g. for image reversal; edge exposure, e.g. for edge bead removal; corrective exposure comprising an imagewise exposure to electromagnetic radiation or corpuscular radiation

Definitions

  • the present invention relates to the field of display technology, and in particular to an exposure method and an exposure machine.
  • liquid crystal displays Unlike the development of display technology, liquid crystal displays have become the most common display devices.
  • the patterning process is used multiple times. Specifically, a mask is placed on the substrate coated with the photoresist, and then exposed to the substrate using the exposure machine. Based on the pattern of the mask, the photoresist has exposed portions and unexposed portions. Then, the photoresist is developed by using a developing solution, thereby removing the exposed portion of the photoresist, leaving the unexposed portion of the photoresist (positive photoresist), or removing the unexposed portion of the photoresist. The exposed portion of the photoresist (negative photoresist) is retained so that the photoresist forms the desired pattern.
  • the exposure accuracy of the existing exposure machine is generally low, that is, the precision size that the exposure machine can achieve is not small enough, so that the size of the pattern formed by the photoresist is large.
  • foreign matter is inevitably present on the exposed substrate, and the foreign matter is higher than the surface of the substrate and the photoresist, so that the distance between the mask and the photoresist cannot be sufficiently close, which is one of the main reasons for limiting the exposure accuracy. Therefore, in the prior art, there are 3 ⁇ 4 questions with low exposure precision, which is difficult to meet the requirements of the current high precision structure of the liquid crystal display. Summary of the invention
  • the invention provides an exposure method, comprising:
  • a second region of the photoresist on the substrate is exposed such that an overlapping portion of the first region and the second region of the photoresist is exposed twice.
  • the difference in displacement between the second position and the first position is smaller than the precision dimension of the exposure machine used in the exposure method.
  • the photoresist is a negative photoresist
  • the exposure method further includes:
  • the portion where the photoresist is exposed twice is retained, and the portion where the photoresist is exposed once and the portion not exposed are removed.
  • the substrate is a color film substrate
  • the photoresist is a color film layer
  • the exposure of both exposures is below 25 mJ.
  • the invention also provides an exposure machine, comprising: a light source;
  • a stage for placing a mask a driver for driving the stage to move the stage parallel to the base.
  • the driver is a motor or a hydraulic machine.
  • the exposure machine has an accuracy of 8 ⁇ m.
  • the present invention brings about the following beneficial effects:
  • the first region and the second region of the photoresist are respectively exposed twice, and a lower exposure amount can be selected for each exposure.
  • the overlapping portion of the first region and the second region is exposed twice, and the saturated exposure can be achieved, and the portion exposed by the exposure is underexposed.
  • the pattern formed by the photoresist is removed only by the portion exposed twice (positive
  • the photoresist is either retained (negative photoresist). Since the portion exposed twice is the overlapping portion of the first region and the second region, the ruler depends on the displacement difference between the first position and the second position of the mask, so that the first of the mask can be adjusted.
  • the position and the second position are such that the portion to be exposed twice is of any size and is not subject to the exposure accuracy of the exposure machine itself. Therefore, the technical solution provided by the present invention can achieve higher exposure accuracy when the exposure accuracy of the exposure machine is low, thereby satisfying the demand for a high-precision structure of the liquid crystal display.
  • FIG. 1 is a schematic diagram of an exposure method according to Embodiment 1 of the present invention.
  • 2 is a schematic diagram of an exposure method according to Embodiment 1 of the present invention;
  • FIG. 3 is a schematic diagram of an exposure machine according to Embodiment 1 of the present invention;
  • FIG. 4 is a schematic diagram of an exposure method according to Embodiment 2 of the present invention.
  • Embodiment 1 An exposure method provided by an embodiment of the present invention.
  • the color film layer on the color filter substrate is produced by the exposure method.
  • the exposure method includes -
  • 81 Place the mask in a first position above the substrate to be exposed.
  • the substrate is coated with a photoresist (i.e., a color film layer).
  • a photoresist i.e., a color film layer.
  • a negative photoresist which is relatively common in the manufacture of a color film layer is used.
  • S2 As shown in FIG. 1, the first region 10 of the photoresist on the substrate is exposed.
  • the precision dimension of the exposure machine is 8 ⁇ m, that is, the minimum dimension a in the exposed first region is 8 ⁇ .
  • the conventional exposure amount of the negative photoresist is generally 5 () mJ, and the exposure amount in this step should be smaller than the conventional one. Exposure amount, the exposure amount in this step can be selected below 25mJ.
  • S3 Move the mask to a second position above the substrate.
  • the difference in displacement between the second position and the first position is smaller than the precision size of the exposure machine used in the exposure method.
  • the width c of the overlapping portion 30 of the first region 0 and the second region 20 is 4 ⁇ m.
  • the exposure amount in this step is equal to the exposure amount in step S2.
  • the photoresist is developed with a developing solution, and the portion 30 where the photoresist is exposed twice is left, and the portion where the photoresist is exposed once and the portion not exposed are removed.
  • the portion exposed once is underexposed, and the photosensitive material therein does not undergo a sufficient crosslinking reaction.
  • the regions other than the first region 10 and the second region 20 are not exposed, and the photosensitive material therein does not undergo a crosslinking reaction. Therefore, after development, the portion that is exposed once and the portion that is not exposed are removed.
  • the portion exposed twice is the overlapping portion 30 of the first region 10 and the second region 20, the size thereof depends on the displacement difference between the first position and the second position of the mask, so that the mask can be adjusted by the first
  • the one position and the second position cause the portion 30 to be exposed twice to be of any size without being limited by the exposure accuracy of the exposure machine itself.
  • the minimum width of the pattern formed by the photoresist is 4 ⁇ m, which is smaller than the precision size of the exposure machine itself, 8 ⁇ m. Therefore, according to the exposure method provided by the embodiment of the present invention, higher exposure precision can be achieved with a lower exposure precision of the exposure machine, thereby satisfying the demand for a high-precision structure of the liquid crystal display.
  • an embodiment of the present invention further provides an exposure machine including a light source 1, a base 2, a stage 3, and a driver 4.
  • the base 2 is used to place the exposed substrate, and the stage 3 is used to place the mask.
  • the driver 4 is preferably a motor or a hydraulic machine, and is configured to drive the stage 3 so that the stage 3 can move parallel to the base 2.
  • the above exposure method provided by the embodiment can be realized by the exposure machine.
  • the photoresist-coated substrate is placed on the base 2, and the mask is placed on the stage 3, so that the mask is placed at the first position above the substrate, that is, step S is performed.
  • step S2 the light source 1 is turned on to expose the first region of the photoresist on the substrate, that is, step S2 is performed.
  • step S3 the stage 4 is driven by the driver 4 to translate the mask to the second position above the substrate, i.e., step S3 is performed.
  • step S4 the light source 1 is turned on again, and the second region of the photoresist is exposed so that the overlapping portion of the first region and the second region of the photoresist is exposed twice, that is, step S4 is performed.
  • step S5 the photoresist is developed by the developer, i.e., step S5 is performed.
  • the size of the pattern formed by the photoresist can be made smaller than the precision size of the exposure machine itself, so that higher exposure precision can be realized under the exposure precision of the exposure machine, thereby satisfying the high-precision structure of the liquid crystal display. demand.
  • other components such as an array substrate may be manufactured by using the exposure method and the exposure machine provided by the embodiments of the present invention.
  • the photoresist used may also be a positive photoresist.
  • Embodiment 2 - The exposure method provided in this embodiment is basically the same as that in Embodiment 1, except that in step S3, the moving direction of the mask is obliquely 1 translation.

Abstract

一种曝光方法及曝光机,该曝光方法包括:将掩膜板放置于待曝光的基板上方的第一位置;对所述基板上的光刻胶的第一区域(10)进行曝光;将所述掩膜板移动至所述基板上方的第二位置;对所述基板上的光刻胶的第二区域(20)进行曝光,使所述光刻胶的第一区域(10)与第二区域(20)的重叠部分(30)被曝光两次。所述曝光机包括:光源(1);用于放置所述基板的基台(2);用于放置所述掩膜板的载台(3);驱动器(4),用于驱动所述载台(3),使所述载台(3)平行于所述基台(2)移动。该方法可用于液晶显示器的制造过程。该曝光方法及曝光机能够达到更高的曝光精度。

Description

曝光方法及曝光 fl
本申请要求享有 2014年 8月 14日提交的名称为 "曝光方法及曝光机" 的中国专利申 请 CN201410400540.9的优先权, 其全部内容通过引用并入本文中。
本发明涉及显示技术领域, 具体地说, 涉及一种曝光方法及曝光机。
不 随着显示技术的发展, 液晶显示器己经成为最为常见的显示装置。
在液晶显示器的制造过程中, 会多次利用构图工艺。具体为, 在涂有光刻胶的基板上 方放置掩膜板, 然后对利用曝光机基板进行曝光。基于掩膜板的图案, 光刻胶会有被曝光 的部分和未被曝光的部分。再利用显影液对光刻胶进行显影, 即可去除光刻胶被曝光的部 分, 保留光刻胶未被曝光的部分(正性光刻胶) , 或者去除光刻胶未被曝光的部分, 保留 光刻胶被曝光的部分 (负性光刻胶) , 从而使光刻胶形成所需的图形。 但是,现有的曝光机的曝光精度普遍较低,也就是曝光机所能达到的精度尺寸不够小, 使光刻胶所形成的图形的尺寸较大。此外, 被曝光的基板上难免会有异物, 这些异物高出 基板及光刻胶表面,使掩膜板与光刻胶之间的距离不能足够接近,这也是限制曝光精度的 主要原因之一。 因此, 现有技术中存在曝光精度较低的! ¾题, 难以满足当前液晶显示器高 精度结构的需求。 发明内容
本发明的目的在于提供一种曝光方法及曝光机, 以达到更高的曝光精度。 本发明提供一种曝光方法, 包括:
将掩膜板放置亍待曝光的基板上方的第一位置; 对所述基板上的光刻胶的第一区域进行曝光- 将所述掩膜板移动至所述基板上方的第二位置;
对所述基板上的光刻胶的第二区域进行曝光,使所述光刻胶的第一区域与第二区域的 重叠部分被曝光两次。
优选的,所述第二位置与所述第一位置之间的位移差,小于该曝光方法中所使用的曝 光机的精度尺寸。
优选的, 所述光刻胶为负性光刻胶;
该曝光方法还包括:
保留所述光刻胶被曝光两次的部分,去除所述光刻胶被曝光一次的部分和未被曝光的 部分。
优选的, 所述基板为彩膜基板, 所述光刻胶为彩膜层。
优选的, 两次曝光的曝光量均在 25mJ以下。
本发明还提供一种曝光机, 包括: 光源;
基台, 用于放置被曝光的基板;
载台, 用于放置掩膜板; 驱动器, 用于驱动所述载台, 使所述载台平行于所述基台移动。
优选的, 所述驱动器为电机或液压机。
优选的, 所述曝光机的精度尺寸为 8μπι。 本发明带来了以下有益效果: 本发明提供的曝光方法中,分别对光刻胶的第一区域和 第二区域进行两次曝光,每次曝光可以选用较低的曝光量。第一区域与第二区域的重叠部 分被曝光两次, 能够达到饱和曝光, 而被曝光一次的部分曝光不足, 经过显影之后光刻胶 形成的图形只有被曝光两次的部分被去除 (正性光刻胶) 或被保留 (负性光刻胶) 。 因为该被曝光两次的部分为第一区域与第二区域的重叠部分,其尺才取决于掩膜板的 第一位置与第二位置的位移差,所以可以通过调节掩膜板的第一位置和第二位置,使该被 曝光两次的部分为任意尺寸, 而不受曝光机本身的曝光精度的 Κ制。 因此, 本发明提供的 技术方案, 能够在曝光机的曝光精度较低的情况下, 实现更高的曝光精度, 从而能够满足 液晶显示器高精度结构的需求。 本发明的其它特征和优点将在随后的说明书中阐述,并且,部分地从说明书中变得显 而易见, 或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利要 求书以及附图中所特别指出的结构来实现和获得。
附圏说明 为了更清楚地说明本发明实施 ί到中的技术方案,下面将对实施例描述中所需要的 图 做简单的介绍- 图 1是本发明实施例一提供的曝光方法的示意图之一; 图 2是本发明实施例一提供的曝光方法的示意图之二; 图 3是本发明实施例一提供的曝光机的示意图; 图 4是本发明实施例二提供的曝光方法的示意图。
具体实施方式 以下将结合附图及实施例来详细说明本发明的实施方式,借此对本发明如何应 ^技术 手段来解决技术问题,并达成技术效果的实现过程能充分理解并据以实施。需要说明的是, 只要不构成冲突,本发明中的各个实施 ί到以及各实施例中的各个特 可以相互结合,所形 成的技术方案均在本发明的保护范围之内。 实施例一: 本发明实施例提供的一种曝光方法。本实施例中,利用该曝光方法制造彩膜基板上的 彩膜层。 该曝光方法包括-
81: 将掩膜板放置于待曝光的基板上方的第一位置。 其中, 基板上涂有光刻胶(即彩膜层), 本实施例中采用的是彩膜层的制造中较为常 见的负性光刻胶。
S2: 如图 1所示, 对基板上的光刻胶的第一区域 10进行曝光。 本实施例中,曝光机的精度尺寸为 8μηι,即被曝光的第一区域中的最小尺寸 a为 8μη。 此外, 对负性光刻胶常规的曝光量一般为 5()mJ, 而本歩骤中的曝光量应当小于常规 曝光量, 本步骤中的曝光量可以选取在 25mJ以下。 S3 : 将掩膜板移动至基板上方的第二位置。
作为一个优选方案,第二位置与第一位置之间的位移差,小于该曝光方法中所使用的 曝光机的精度尺寸。
S4: 如图 2所示, 对基板上的光刻胶的第二区域 20进行曝光, 使光刻胶的第一区域 10与第二区域 20的重叠部分 30被曝光两次。
因为在歩骤 S3中是将掩膜板向右平移, 且平移的距离 b为 4μηι, 所以第一区域 0 与第二区域 20的重叠部分 30的宽度 c为 4μπι。
优选的, 本步骤中的曝光量与步骤 S2中的曝光量相等。
85: 利用显影液对光刻胶进行显影, 保留光刻胶被曝光两次的部分 30, 去除光刻胶 被曝光一次的部分和未被曝光的部分。
因为第一区域 10与第二区域 20的重叠部分 30被曝光两次, 能够达到饱和曝光, 使 光刻胶中的光敏材料发生了充分的交联反应, 所以经过显影之后, 被曝光两次的部分 30 被保留。
在第一区域 10和第二区域 20中,被曝光一次的部分曝光不足,其中的光敏材料没有 发生充分的交联反应。第一区域 10和第二区域 20以外的区域则未被曝光,其中的光敏材 料没有发生的交联反应。 因此, 经过显影之后, 被曝光一次的部分和未被曝光的部分被去
因为被曝光两次的部分为第一区域 10与第二区域 20的重叠部分 30, 其尺寸取决于 掩膜板的第一位置与第二位置的位移差, 所以可以通过调节掩膜板的第一位置和第二位 置, 使该被曝光两次的部分 30为任意尺寸, 而不受曝光机本身的曝光精度的限制。 本实 施例中, 光刻胶所形成的图形的最小宽度为 4μπι, 小于曝光机本身的精度尺寸 8μηι。 因 此, 采用本发明实施例提供的曝光方法, 能够在曝光机的曝光精度较低的情况下, 实现更 高的曝光精度, 从而能够满足液晶显示器高精度结构的需求。
如图 3所示, 本发明实施例还提供一种曝光机, 包括光源 1、 基台 2、 载台 3和驱动 器 4。
其中, 基台 2用于放置被曝光的基板, 载台 3用于放置掩膜板。驱动器 4优选为电机 或液压机, ^于驱动载台 3 , 使载台 3能够平行于基台 2移动。 使^该曝光机能够实现本实施例提供的上述曝光方法。
具体为, 先将涂有光刻胶的基板放置在基台 2上, 并将掩膜板放置在载台 3上, 使掩 膜板位于基板上方的第一位置, 即进行步骤 S 。
然后打开光源 1, 对基板上的光刻胶的第一区域进行曝光, 即进行步骤 S2。 对第一区域曝光之后, 利用驱动器 4驱动载台 3 , 使掩膜板平移至基板上方的第二位 置, 即进行步骤 S3。 然后再次打开光源 1 , 对光刻胶的第二区域进行曝光, 使光刻胶的第一区域与第二区 域的重叠部分被曝光两次, 即进行歩骤 S4。 最后, 利用显影液对光刻胶进行显影, 即进行步骤 S5。 这样就能够使光刻胶形成的图形的尺寸小于曝光机本身的精度尺寸,从而能够在曝光 机的曝光精度较低的情况下,实现更高的曝光精度,从而能够满足液晶显示器高精度结构 的需求。 应当说明的是,在其他实施方式中,也可以利用本发明实施例提供的曝光方法及曝光 机来制造阵列基板等其他部件。 当然, 所用的光刻胶也可以是正性光刻胶。 实施例二- 本实施例提供的曝光方法与实施例一基本相同, 其不同点在于, 在步骤 S3中, 掩膜 板的运动方向为斜 1 平移。
如图 4所示,将掩膜板斜向平移之后,第一区域 10与第二区域之 20间不仅存在横向 位移差 b, 还存在一定的纵向位移差 d。 再经过第二次曝光及显影之后, 光刻胶所形成的 图形不仅在横向尺寸上能够达到更高的曝光精度, 其纵向尺寸也能够达到更高的曝光精 度, 从而能够在横向和纵向上都能够满足液晶显示器高精度结构的需求。 虽然本发明所公开的实施方式如上,但所述的内容只是为了便于理解本发明而采用的 实施方式, 并非用以限定本发明。任何本发明所属技术领域内的技术人员, 在不脱离本发 明所公开的精神和范围的前提下,可以在实施的形式上及细节上作任何的修改与变化,但 本发明的专利保护范围, 仍须以所附的权利要求书所界定的范围为准。

Claims

扠利耍求书
1、 一种曝光方法, 包括:
将掩膜板放置于待曝光的基板上方的第一位置;
对所述基板上的光刻胶的第一区域进行曝光;
将所述掩膜板移动至所述基板上方的第二位置;
对所述基板上的光刻胶的第二区域进行曝光,使所述光刻胶的第一区域与第二区域的 重叠部分被曝光两次。
2、 如权利要求 1所述的曝光方法, 其中, 所述第二位置与所述第一位置之间的位移 差, 小于该曝光方法中所使用的曝光机的精度尺寸。
3、 如权利要求 1所述的曝光方法, 其中, 所述光刻胶为负性光刻胶;
该曝光方法还包括:
保留所述光刻胶被曝光两次的部分,去除所述光刻胶被曝光一次的部分和未被曝光的 部分。
4、 如权利要求 3所述的曝光方法, 其中, 所述基板为彩膜基板, 所述光刻胶为彩膜 层。
5、 如权利要求 1所述的曝光方法, 其中, 两次曝光的曝光量均在 25mJ以不。
6、 一种曝光机, 包括- 光源;
基台, 用于放置被曝光的基板;
载台, ^于放置掩膜板;
驱动器, 用于驱动所述载台, 使所述载台平行亍所述基台移动。
7、 如权利要求 6所述的曝光机, 其中, 所述驱动器为电机或液压机。
8、 如权利要求 6所述的曝光机, 其中, 所述曝光机的精度尺寸为 8μη。
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