WO2016033833A1 - 一种掩模板及使用掩模板制作光阻间隔物的方法 - Google Patents

一种掩模板及使用掩模板制作光阻间隔物的方法 Download PDF

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Publication number
WO2016033833A1
WO2016033833A1 PCT/CN2014/086826 CN2014086826W WO2016033833A1 WO 2016033833 A1 WO2016033833 A1 WO 2016033833A1 CN 2014086826 W CN2014086826 W CN 2014086826W WO 2016033833 A1 WO2016033833 A1 WO 2016033833A1
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Prior art keywords
light
shielding portion
mask
photoresist
area
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English (en)
French (fr)
Inventor
吕启标
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/404,639 priority Critical patent/US9632366B2/en
Publication of WO2016033833A1 publication Critical patent/WO2016033833A1/zh
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • 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
    • G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
    • G03F1/54—Absorbers, e.g. of opaque materials
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • G02F1/13398—Spacer materials; Spacer properties

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a mask and a method of fabricating a photoresist spacer using the mask.
  • the thin film transistor liquid crystal display is composed of two upper and lower glass substrates, wherein the upper glass substrate is a color film substrate, and the last process of the liquid crystal display is to form a photoresist spacer on the substrate (PS: Photo Spacer), the role of the photoresist spacer is to support the upper and lower substrates, so that a certain gap is formed between the two substrates to fill the liquid crystal.
  • PS Photo Spacer
  • the pixels become smaller and smaller, so that there is not enough space on the array substrate side to place the photoresist spacers, and it is necessary to fabricate sub-photoresist spacers of different heights, thereby improving the uniformity of the gap width between the glass substrates. Sex, and thus improve the display effect of the liquid crystal display.
  • the present invention constructs a method of fabricating a photoresist spacer using a mask, wherein the mask includes a first light transmissive region, wherein the first light transmissive region includes a light shielding portion;
  • the method of fabricating a photoresist spacer includes:
  • the area of the light shielding portion of the first light-transmitting region is determined according to a preset height of the secondary photoresist spacer, and the light shielding portion includes a first light-shielding portion and a second light-shielding portion having the same area and the same shape. .
  • the height of the secondary photoresist spacer is inversely proportional to the area of the light shielding portion.
  • the area of the first light-shielding portion and the area of the second light-shielding portion are both in the range of 1 square micrometer to 100 square micrometer.
  • a sum of areas of the first light-shielding portion and the second light-shielding portion is 30% to 40% of an area of the first light-transmitting region.
  • a distance between the first light shielding portion and the second light shielding portion is from 1 micrometer to 10 micrometers.
  • the mask includes at least two of the first light-transmitting regions
  • the areas of the light shielding portions of the at least two of the first light-transmitting regions are different to form the second photoresist spacers of at least two heights.
  • the mask further includes a second light transmissive region for forming a main photoresist spacer.
  • the present invention constructs a method of fabricating a photoresist spacer using a mask, wherein the mask includes a first light transmissive region, and the first light transmissive region includes a light shielding portion;
  • the method of fabricating a photoresist spacer includes:
  • the area of the light shielding portion of the first light transmitting region is determined according to a preset height of the secondary photoresist spacer.
  • the height of the sub-thresist spacer is inversely proportional to the area of the light shielding portion.
  • the light shielding portion includes a first light shielding portion and a second light shielding portion having the same area and the same shape.
  • the area of the first light-shielding portion and the area of the second light-shielding portion are both in the range of 1 square micrometer to 100 square micrometer.
  • a sum of areas of the first light-shielding portion and the second light-shielding portion is 30% to 40% of an area of the first light-transmitting region.
  • a distance between the first light shielding portion and the second light shielding portion is from 1 micrometer to 10 micrometers.
  • the mask includes at least two of the first light-transmitting regions; wherein the light-shielding portions of the at least two of the first light-transmitting regions The areas are different to form the secondary photoresist spacers of at least two heights.
  • the mask further includes a second light transmissive region for forming a main photoresist spacer.
  • Another object of the present invention is to provide a mask including a first light-transmissive region for forming a sub-light-resistance spacer, the first light-transmitting region including a light-shielding portion, The area of the light shielding portion is set according to a preset height of the secondary photoresist spacer.
  • the light shielding portion includes a first light shielding portion and a second light shielding portion having the same area and the same shape.
  • the area of the first light-shielding portion and the area of the second light-shielding portion are both in the range of 1 square micrometer to 100 square micrometer.
  • the sum of the areas of the first light-shielding portion and the second light-shielding portion is 30% to 40% of the area of the first light-transmitting region.
  • a distance between the first light shielding portion and the second light shielding portion is from 1 micrometer to 10 micrometers.
  • the height of the sub-thresist spacer is inversely proportional to the area of the light shielding portion.
  • the mask sheet of the present invention and the method for fabricating a photoresist spacer using the mask sheet, by providing light-shielding portions having different areas on the first light-transmitting region, sub-photoresist spacers having different heights are obtained to increase the gap width between the glass substrates. Uniformity, which in turn improves the display performance of the liquid crystal display.
  • FIG. 1 is a schematic structural view of a cross section of a mask according to the present invention.
  • FIG. 2 is a flow chart of a method for fabricating a photoresist spacer using a mask according to the present invention
  • FIG. 3 is a schematic structural view of a light transmission region of a mask according to the present invention.
  • FIG. 4 is a schematic view showing the height change of the shielding portion and the photoresist spacer of different areas of the mask of the present invention
  • FIG. 5 is a schematic diagram showing the variation of the growth interval of the photoresist spacer according to the area of the light shielding portion as a percentage of the light transmission region;
  • Figure 6 is a schematic view showing the preferred structure of the first light-transmitting region of the mask of the present invention.
  • FIG. 1 is a schematic structural view of a cross section of a mask according to the present invention.
  • the mask 1 includes a first light-transmissive region 11, a second light-transmitting region 12, and an opaque region 13 (other than the first light-transmitting region and the second light-transmitting region).
  • the first light-transmitting region 11 includes light-shielding portions 111 or 112, and the light-shielding portions may be one, two or two or more.
  • the first light-transmissive region 11 is configured to form a secondary photoresist spacer; and the second light-transmitting region 12 is configured to form a main photoresist spacer.
  • the mask of the present invention transmits a light-shielding portion on the first light-transmissive region, and adjusts the area of the light-shielding portion to obtain sub-photoresist spacers of different heights.
  • the area of the light shielding portion of the first light-transmitting region 11 is determined according to a preset height of the secondary photoresist spacer.
  • the secondary photoresist spacer is formed by using a mask plate having the area of the light shielding portion. The specific fabrication process is as shown in FIG. 2:
  • S102 exposing the negative photoresist material by using the mask; by exposure, light is irradiated to the substrate that has been coated with the negative photoresist through the first light-transmitting region on the mask 1. Finally, a pattern formed by the light-transmitting region on the reticle is finally transferred onto the substrate, and the substrate may be a glass substrate.
  • the molecular structure of the negative-resistance material subjected to the illumination portion is changed, and does not react with the developer at the time of performing the development process of the step S103.
  • the negative photoresist material provided with the light shielding portion since the light shielding portions can reduce the light intensity irradiated onto the negative photoresist material through the mask, and thus are negatively irradiated by the lower light intensity on the substrate
  • the photoresist material (the portion corresponding to the light-shielding portion) is more easily reacted and dissolved with the developer during development, and thus is compared with the sub-photoresist spacer formed by the light-transmitting region where the light-shielding portion is not provided.
  • the sub-photoresist spacer formed by the light-transmitting portion of the light-shielding portion is lowered in height. Since the method provides a light-shielding portion having a different area in the first light-transmitting region 11 of the mask 1 , a secondary photoresist spacer of a different height can be obtained.
  • Two light-shielding portions can be employed to cause a diffraction effect during light irradiation.
  • the diffraction of light is a phenomenon in which light travels away from obstacles when obstacles or small holes are encountered during propagation.
  • the diffraction effect redistributes the intensity of light behind the shading portion, which is distinguished from the intensity distribution given by geometric optics and the intensity distribution when the light wave is free to propagate.
  • the negative photoresist material under the pattern formed on the substrate by the light shielding portion is also irradiated with light by the diffraction effect of the light, so that the surface of the secondary photoresist spacer does not leave a hole.
  • the intensity of the diffraction effect can also be changed by adjusting the size of the area of the light shielding portion.
  • an experiment is performed by providing two light-shielding portions in the first light-transmitting region.
  • a series of light-transmitting regions of the same size L1-L6 are designed, and all of the light-transmitting regions are rectangular in shape.
  • the length is 25um and the width is 10um.
  • two equal-sized square shading portions are respectively disposed in each of the light-transmitting regions of L2-L6, wherein the light-transmitting region of L1 is not provided with a blocking portion, and L1 is used for making the main photoresist interval.
  • the sum of the areas of the two light-shielding portions of L2-L6 is gradually increased, and L2-L6 is used to fabricate sub-photoresist spacers having different heights.
  • the photoresist spacer is made of a negative photoresist material
  • the light-shielding portion of the light-transmitting region on the mask is opaque, and other portions of the light-transmitting region are transparent.
  • the specific experimental parameters are designed as shown in Table 1.
  • L1-L6 is the height of the photoresist spacer as the sum of the areas of the two light-shielding portions increases. Gradually decreases. If the light shielding portion is disposed in the first light transmitting region when the mask is designed, the larger the area of the light shielding portion, the more the height of the secondary photoresist spacer is lowered, and the secondary photoresist spacer is visible. The height is inversely proportional to the area of the light shielding portion.
  • the principle is that the larger the area of the light shielding portion, the more the light intensity that is irradiated onto the negative photoresist material through the mask plate is reduced during exposure, so that the corresponding negative direction of the light shielding portion The more the portion of the photoresist material that reacts with the developer during development, the more the height is lowered. Thus, the area in which the light shielding portion is provided can be increased to lower the height of the sub photoresist spacer.
  • FIG. 4 shows the trend of the height of the photoresist spacer along with the area of the light-shielding portion, and the abscissa is the type of the light-transmitting region, and the ordinate is the height of the photoresist spacer in micrometers. As the sum of the areas of the light shielding portions of L1-L6 gradually increases, the height of the secondary photoresist spacer is lower.
  • FIG. 5 is a graph showing a variation trend of the growth margin of the photoresist spacer as a percentage of the area of the light-shielding portion as a percentage of the light-transmitting region, and an abscissa is a percentage of the area of the two light-shielding portions as a percentage of the light-transmitting region,
  • the coordinate is a percentage of the growth amplitude of the photoresist spacer, and as the sum of the areas of the light shielding portions increases as a percentage of the light transmission region, the height of the photoresist spacer decreases, that is, a negative growth. Its growth rate has become smaller.
  • FIG. 6 is a schematic diagram of a preferred structure of a first light-transmitting region of a mask according to the present invention.
  • the first light-transmitting region 11 is rectangular, and the shapes of the first light-shielding portion 111 and the second light-shielding portion 112 are both rectangular or square, the first light-transmitting portion may of course have other shapes, such as Round.
  • the first light-transmitting region 11 includes a pair of long sides arranged in parallel and a pair of short sides arranged in parallel, and a distance a1 between the first light-shielding portion 111 and the upper long side 20 is equal to the first light-shielding portion and the lower side
  • a distance between the short side 22 of the first light shielding portion 111 from a side thereof is c, a distance d between the first light shielding portion 111 and the second light shielding portion 112, and the second light shielding portion
  • the distance e between the short sides of the side 23 is equal to the distance of the above three.
  • the shape of the first light-shielding portion and the second light-shielding portion are also circular
  • the shape of the light-shielding portion may be square or rectangular, and the light-shielding portion may also be
  • the method of the invention can be implemented for other shapes.
  • the first light-shielding portion and the second light-shielding portion are center-centered, and the distance between the first light-shielding portion and the closest point on the first light-transmitting region, and the first a distance between a light shielding portion and the second light shielding portion (a point on the first light shielding portion that is closest to the second light shielding portion and a point on the second light shielding portion that is closest to the first light shielding portion)
  • the distance between the points, the distance between the second light-shielding portion and the closest point on the first light-transmitting region, the distances of the three are equal.
  • the area of the first light-shielding portion and the area of the second light-shielding portion are both from 1 square micrometer to 100 square micrometers, and since the area of the light-shielding portion is within the range, the size of the light-shielding portion is smaller than The exposure accuracy of the exposure machine ensures that the surface of the secondary photoresist spacer produced is smooth.
  • a sum of areas of the first light shielding portion and the second light shielding portion is 30% to 40% of an area of the first light transmission region, when the first light shielding portion and the second light shielding portion When the sum of the areas is within this range, the surface of the secondary photoresist spacer is left free of holes.
  • the distance between the first light-shielding portion and the second light-shielding portion is from 1 micrometer to 10 micrometers, which can ensure that the surface of the secondary photoresist spacer produced during the development process is smooth.
  • the mask includes at least two of the first light-transmitting regions; wherein an area of the light-shielding portions of the at least two of the first light-transmitting regions is different to form at least two heights Secondary photoresist spacers to meet the needs of making sub-photoresist spacers of different heights.
  • the mask sheet of the present invention and the method for fabricating a photoresist spacer using the mask sheet, by providing light-shielding portions having different areas on the first light-transmitting region, sub-photoresist spacers having different heights are obtained to increase the gap width between the glass substrates. Uniformity, which in turn improves the display performance of the liquid crystal display.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Preparing Plates And Mask In Photomechanical Process (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)

Abstract

一种掩模板（1）及使用掩模板（1）制作光阻间隔物的方法，所述方法包括：使用掩模板（1）对涂布的负向光阻材料进行曝光并显影；以形成具预设高度的次光阻间隔物；其中所述掩模板的（1）遮光部分（111、112）的面积是根据所述次光阻间隔物的预设高度确定的，通过该方法能够得到高度不同的次光阻间隔物。

Description

一种掩模板及使用掩模板制作光阻间隔物的方法 技术领域
本发明涉及液晶显示器技术领域，特别是涉及一种掩模板及使用掩模板制作光阻间隔物的方法。
 背景技术
薄膜晶体管液晶显示器是由上下两块玻璃基板组成，其中上玻璃基板是彩膜基板，液晶显示器的最后一道工序是在基板上面制作光阻间隔物(PS: Photo Spacer)，光阻间隔物的作用是支撑上下基板，使得两块基板之间形成一定的间隙以填充液晶。
由于显示器注入液晶的量是一定的，过大的间隙会使得液晶无法填满空隙，影响显示器的显示效果；间隙偏小会直接降低面板的穿透率，使得面板能效降低。因此，上下基板之间的间隙必须精确地控制。
随着显示器分辨率越来越高，像素越来越小，使得阵列基板侧没有足够的空间放置光阻间隔物，需要制作不同高度的次光阻间隔物，从而提高玻璃基板间间隙宽度的均匀性，进而提高液晶显示器的显示效果。
因此，有必要提供一种掩模板及使用掩模板制作光阻间隔物的方法，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掩模板及使用掩模板制作光阻间隔物的方法，以提高玻璃基板间间隙宽度的均匀性，进而提高液晶显示器的显示效果。
 技术解决方案
为解决上述技术问题，本发明构造了一种使用掩模板制作光阻间隔物的方法，其中所述掩模板包括第一透光区域，其中所述第一透光区域包括遮光部分；
Figure TP140546PCT-appb-I000001
所述制作光阻间隔物的方法包括：
在液晶显示器的基板的表面涂布负向光阻材料；
Figure TP140546PCT-appb-I000001
使用所述掩模板对所述负向光阻材料进行曝光；以及
对所述曝光后的负向光阻材料进行显影，以形成具预设高度的次光阻间隔物；
Figure TP140546PCT-appb-I000001
其中根据所述次光阻间隔物的预设高度，确定所述第一透光区域的所述遮光部分的面积，所述遮光部分包括面积相等、形状相同的第一遮光部分以及第二遮光部分。
Figure TP140546PCT-appb-I000001
所述次光阻间隔物的高度与所述遮光部分的面积成反比。
在本发明的使用掩模板制作光阻间隔物的方法中，所述第一遮光部分的面积以及所述第二遮光部分的面积的范围均为1平方微米至100平方微米。
在本发明的使用掩模板制作光阻间隔物的方法中，所述第一遮光部分和所述第二遮光部分的面积之和为所述第一透光区域面积的30%至40%。
Figure TP140546PCT-appb-I000001
在本发明的使用掩模板制作光阻间隔物的方法中，所述第一遮光部分与所述第二遮光部分之间的间距为1微米至10微米。
在本发明的使用掩模板制作光阻间隔物的方法中，所述掩模板包括至少两个所述第一透光区域；
Figure TP140546PCT-appb-I000001
其中所述至少两个所述第一透光区域的所述遮光部分的面积不同，以形成至少两种高度的所述次光阻间隔物。
在本发明的使用掩模板制作光阻间隔物的方法中，所述掩模板还包括第二透光区域，所述第二透光区域用于形成主光阻间隔物。
本发明构造了一种使用掩模板制作光阻间隔物的方法，其中所述掩模板包括第一透光区域，所述第一透光区域包括遮光部分；
所述制作光阻间隔物的方法包括：
Figure TP140546PCT-appb-I000001
在液晶显示器的基板的表面涂布负向光阻材料；
使用所述掩模板对所述负向光阻材料进行曝光；
对所述曝光后的负向光阻材料进行显影，以形成具预设高度的次光阻间隔物；
Figure TP140546PCT-appb-I000001
其中根据所述次光阻间隔物的预设高度，确定所述第一透光区域的所述遮光部分的面积。
Figure TP140546PCT-appb-I000001
在本发明的使用掩模板制作光阻间隔物的方法中，所述次光阻间隔物的高度与所述遮光部分的面积成反比。
在本发明的使用掩模板制作光阻间隔物的方法中，所述遮光部分包括面积相等、形状相同的第一遮光部分以及第二遮光部分。
在本发明的使用掩模板制作光阻间隔物的方法中，所述第一遮光部分的面积以及所述第二遮光部分的面积的范围均为1平方微米至100平方微米。
Figure TP140546PCT-appb-I000001
在本发明的使用掩模板制作光阻间隔物的方法中，所述第一遮光部分和所述第二遮光部分的面积之和为所述第一透光区域面积的30%至40%。
在本发明的使用掩模板制作光阻间隔物的方法中，所述第一遮光部分与所述第二遮光部分之间的间距为1微米至10微米。
在本发明的使用掩模板制作光阻间隔物的方法中，所述掩模板包括至少两个所述第一透光区域；其中所述至少两个所述第一透光区域的所述遮光部分的面积不同，以形成至少两种高度的所述次光阻间隔物。
在本发明的使用掩模板制作光阻间隔物的方法中，所述掩模板还包括第二透光区域，所述第二透光区域用于形成主光阻间隔物。
本发明的另一个目的在于提供一种掩模板，其包括第一透光区域，所述第一透光区域用于形成次光阻间隔物，所述第一透光区域包括遮光部分，所述遮光部分的面积根据所述次光阻间隔物的预设高度设置的。
在本发明的掩模板中，所述遮光部分包括面积相等、形状相同的第一遮光部分以及第二遮光部分。
在本发明的掩模板中，所述第一遮光部分的面积以及所述第二遮光部分的面积的范围均为1平方微米至100平方微米。
在本发明的掩模板中，所述第一遮光部分和所述第二遮光部分的面积之和为所述第一透光区域面积的30%至40%。
在本发明的掩模板中，所述第一遮光部分与所述第二遮光部分之间的间距为1微米至10微米。
在本发明的掩模板中，所述次光阻间隔物的高度与所述遮光部分的面积成反比。
 有益效果
本发明的掩模板及使用掩模板制作光阻间隔物的方法，通过在第一透光区域上设置面积不同的遮光部分，从而得到高度不同的次光阻间隔物，以提高玻璃基板间间隙宽度的均匀性，进而提高液晶显示器的显示效果。
 附图说明
图1为本发明的掩模板的横截面的结构示意图；
图2为本发明使用掩模板制作光阻间隔物的方法流程图；
图3为本发明的掩模板透光区域的结构示意图；
图4为本发明的掩模板的不同面积的遮挡部分与光阻间隔物高度变化示意图；
图5为本发明光阻间隔物的增长幅度随所述遮光部分的面积占透光区域百分比的变化的示意图；
图6为本发明的掩模板第一透光区域的优选结构示意图。
 本发明的最佳实施方式
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。
请参照图1，图1为本发明的掩模板横截面的结构示意图。
Figure TP140546PCT-appb-I000001
本发明的掩模板，如图1所示，所述掩模板1包括第一透光区域11、第二透光区域12及不透光区域13（第一透光区域和第二透光区域以外的部分），所述第一透光区域11包括遮光部分111或112，所述遮光部分可以为一个、两个或者两个以上。所述第一透光区域11，用于形成次光阻间隔物；所述第二透光区域12，用于形成主光阻间隔物。
Figure TP140546PCT-appb-I000001
本发明的掩模板透过在所述第一透光区域上设置遮光部分，通过调整遮光部分的面积，以得到不同高度的次光阻间隔物。
在制作次光阻间隔物的步骤之前，根据所述次光阻间隔物的预设高度，确定所述第一透光区域11的所述遮光部分的面积。使用设置好所述遮光部分面积的掩模板制作所述次光阻间隔物，具体的制作过程如图2所示：
Figure TP140546PCT-appb-I000001
S101、在液晶显示器的基板的表面涂布负向光阻材料；可以使用甩胶涂布等方法涂布所述负向光阻材料；
Figure TP140546PCT-appb-I000001
S102、使用所述掩模板对所述负向光阻材料进行曝光；通过曝光，光线通过所述掩模板1上的第一透光区域照射到已经涂布了所述负向光阻材料的基板上，最终将所述掩模板上的透光区域形成的图案转移到基板上，所述基板可以是玻璃基板。
S103、对所述曝光后的负向光阻材料进行显影，以形成具预设高度的次光阻间隔物。
Figure TP140546PCT-appb-I000001
在步骤S102时，受到光照部分的所述负向光阻材料的分子结构发生变化，在执行步骤S103的显影工艺时不与显影液发生反应。而设置有所述遮光部分的负向光阻材料，由于这些遮光部分能够降低通过掩膜板照射到所述负向光阻材料上的光强，因而位于基板上受到较低光强照射的负向光阻材料（与所述遮光部分所对应部分）在显影的过程中更容易与显影液发生反应溶解，因此与未设置遮光部分的透光区域形成的次光阻间隔物相比，带有遮光部分的透光区域形成的次光阻间隔物高度降低。由于该方法通过在所述掩膜板1的所述第一透光区域11设置面积不一样的遮光部分，能够得到不同高度的次光阻间隔物。可采用两个遮光部分，从而使得光照射过程中产生衍射效应。光的衍射为光在传播过程中，遇到障碍物或小孔时，绕过障碍物偏离直线传播的现象。衍射效应使得在所述遮光部分后方的光强重新分布，其既区别于几何光学给出的光强分布，又区别于光波自由传播时的光强分布。通过光的衍射效应，使得所述遮光部分在所述基板上形成的图案下面的负向光阻材料也有光照射到，因此所述次光阻间隔物的表面不至于留下孔洞。优选地，还可通过调整所述遮光部分面积的大小改变衍射效应的强弱。
Figure TP140546PCT-appb-I000001
下面以所述第一透光区域设置两个遮光部分进行实验，如图3所示，设计了一系列(L1-L6)大小一样的透光区域，所有透光区域的形状都为长方形，其长为25um，宽为10um，然后分别在L2-L6中的每个透光区域设置两个面积相等的正方形遮光部分，其中L1的透光区域没有设置遮挡部分，L1用于制作主光阻间隔物；L2-L6的两个遮光部分的面积之和逐渐增大，L2-L6是用于制作高度不同的次光阻间隔物。
Figure TP140546PCT-appb-I000001
需要说明的是，由于制作光阻间隔物使用的是负向光阻材料，因此掩膜板上透光区域的遮光部分是不透光的，而透光区域的其他部位都是透光的。具体实验参数设计如表1。
Figure TP140546PCT-appb-I000002
以上每组实验均在相同的制程条件下进行，通过表1给出的实验数据，可以看出，L1-L6是随着两个遮光部分的面积之和的增大，光阻间隔物的高度逐渐降低。如果在设计掩膜板时，在所述第一透光区域设置遮光部分，所述遮光部分的面积越大，所述次光阻间隔物的高度降低越多，可见所述次光阻间隔物的高度与所述遮光部分的面积成反比。其原理在于，所述遮光部分的面积越大，在曝光时，能够将通过掩膜板照射到所述负向光阻材料上的光强降低的更多，使得所述遮光部分对应的负向光阻材料在显影的过程中与显影液发生反应溶解的部分越多，因而高度降低的越多。因而，可以增大设置遮光部分的面积来降低次光阻间隔物的高度。
结合图4和图5，图4给出光阻间隔物的高度随所述遮光部分的面积变化趋势，其横坐标为透光区域的类型，其纵坐标为光阻间隔物的高度，单位为微米，随着L1-L6所述遮光部分的面积之和逐渐增大，所述次光阻间隔物的高度越低。
图5给出光阻间隔物的增长幅度随所述遮光部分的面积占透光区域百分比的变化趋势，其横坐标为所述两个遮光部分的面积之和占所述透光区域的百分比，纵坐标为所述光阻间隔物的增长幅度的百分比，随着所述遮光部分的面积之和占所述透光区域百分比的增大，所述光阻间隔物的高度成降低趋势，即负增长，其增长幅度变小。
优选地，请参照图6，图6为本发明的掩模板第一透光区域的优选结构示意图。当所述第一透光区域11为长方形，所述第一遮光部分111和第二遮光部分112的形状都为长方形或者正方形时，当然，所述第一透光部分也可以为其他形状，譬如圆形。所述第一透光区域11包括一对平行设置的长边和一对平行设置的短边，所述第一遮光部分111与上方的长边20的距离a1等于所述第一遮光部分与下方的长边21的距离b1；所述第二遮光部分112与所述上方的长边20的距离a2等于所述第二遮光部分与所述下方的长边21的距离b2；
所述第一遮光部分111距离靠近其一侧的短边22之间的距离为c，所述第一遮光部分111和所述第二遮光部分112之间的距离d、所述第二遮光部分距离靠近其一侧23的短边之间的距离e，上述三者距离相等。
当所述第一透光区域为圆形，所述第一遮光部分和第二遮光部分的形状也为圆形时，当然所述遮光部分的形状可以是正方形或者长方形、所述遮光部分也可以为其他形状，均可以实现本发明的方法。所述第一遮光部分和所述第二遮光部分以圆心为中心，成中心对称，且所述第一遮光部分距离所述第一透光区域上最近的点之间的距离，以及所述第一遮光部分和所述第二遮光部分之间的距离（位于所述第一遮光部分上距离所述第二遮光部分最近的点与位于所述第二遮光部分上距离所述第一遮光部分最近的点的距离）、所述第二遮光部分距离所述第一透光区域上最近的点之间的距离，上述三者距离相等。
优选地，所述第一遮光部分的面积以及所述第二遮光部分的面积的范围均为1平方微米至100平方微米，由于所述遮光部分的面积处于此范围内，使得遮光部分的尺寸小于曝光机的曝光精度，从而保证制作出来的所述次光阻间隔物表面圆滑。
优选地，所述第一遮光部分和所述第二遮光部分的面积之和为所述第一透光区域面积的30%至40%，当所述第一遮光部分和所述第二遮光部分的面积之和在此范围内时，使得次光阻间隔物的表面不至于留下孔洞。
优选地，所述第一遮光部分与所述第二遮光部分的间距为1微米至10微米，能够保证在显影过程中制作出来的次光阻间隔物表面圆滑。
优选地，所述掩模板包括至少两个所述第一透光区域；其中所述至少两个所述第一透光区域的所述遮光部分的面积不同，以形成至少两种高度的所述次光阻间隔物，以满足制作不同高度的次光阻间隔物的需求。
本发明的掩模板及使用掩模板制作光阻间隔物的方法，通过在第一透光区域上设置面积不同的遮光部分，从而得到高度不同的次光阻间隔物，以提高玻璃基板间间隙宽度的均匀性，进而提高液晶显示器的显示效果。
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 (20)

  1. 一种使用掩模板制作光阻间隔物的方法，其中所述掩模板包括第一透光区域，其中所述第一透光区域包括遮光部分；
    所述制作光阻间隔物的方法包括：
    在液晶显示器的基板的表面涂布负向光阻材料；
    使用所述掩模板对所述负向光阻材料进行曝光；以及
    对所述曝光后的负向光阻材料进行显影，以形成具预设高度的次光阻间隔物；
    其中根据所述次光阻间隔物的预设高度，确定所述第一透光区域的所述遮光部分的面积，所述遮光部分包括面积相等、形状相同的第一遮光部分以及第二遮光部分。
    所述次光阻间隔物的高度与所述遮光部分的面积成反比。
  2. 根据权利要求1所述的使用掩模板制作光阻间隔物的方法，其中所述第一遮光部分的面积以及所述第二遮光部分的面积的范围均为1平方微米至100平方微米。
  3. 根据权利要求1所述的使用掩模板制作光阻间隔物的方法，其中所述第一遮光部分和所述第二遮光部分的面积之和为所述第一透光区域面积的30%至40%。
  4. 根据权利要求1所述的使用掩模板制作光阻间隔物的方法，其中所述第一遮光部分与所述第二遮光部分之间的间距为1微米至10微米。
  5. 根据权利要求1所述的使用掩模板制作光阻间隔物的方法，其中所述掩模板包括至少两个所述第一透光区域；
    其中所述至少两个所述第一透光区域的所述遮光部分的面积不同，以形成至少两种高度的所述次光阻间隔物。
  6. 根据权利要求1所述的使用掩模板制作光阻间隔物的方法，其中所述掩模板还包括第二透光区域，所述第二透光区域用于形成主光阻间隔物。
  7. 一种使用掩模板制作光阻间隔物的方法，其中所述掩模板包括第一透光区域，其中所述第一透光区域包括遮光部分；
    所述制作光阻间隔物的方法包括：
    在液晶显示器的基板的表面涂布负向光阻材料；
    使用所述掩模板对所述负向光阻材料进行曝光；以及
    对所述曝光后的负向光阻材料进行显影，以形成具预设高度的次光阻间隔物；
    其中根据所述次光阻间隔物的预设高度，确定所述第一透光区域的所述遮光部分的面积。
  8. 根据权利要求7所述的使用掩模板制作光阻间隔物的方法，其中所述次光阻间隔物的高度与所述遮光部分的面积成反比。
  9. 根据权利要求7所述的使用掩模板制作光阻间隔物的方法，其中所述遮光部分包括面积相等、形状相同的第一遮光部分以及第二遮光部分。
  10. 根据权利要求9所述的使用掩模板制作光阻间隔物的方法，其中所述第一遮光部分的面积以及所述第二遮光部分的面积的范围均为1平方微米至100平方微米。
  11. 根据权利要求9所述的使用掩模板制作光阻间隔物的方法，其中所述第一遮光部分和所述第二遮光部分的面积之和为所述第一透光区域面积的30%至40%。
  12. 根据权利要求9所述的使用掩模板制作光阻间隔物的方法，其中所述第一遮光部分与所述第二遮光部分之间的间距为1微米至10微米。
  13. 根据权利要求7所述的使用掩模板制作光阻间隔物的方法，其中 所述掩模板包括至少两个所述第一透光区域；
    其中所述至少两个所述第一透光区域的所述遮光部分的面积不同，以形成至少两种高度的所述次光阻间隔物。
  14. 根据权利要求7所述的使用掩模板制作光阻间隔物的方法，其中所述掩模板还包括第二透光区域，所述第二透光区域用于形成主光阻间隔物。
  15. 一种掩模板，其中所述掩模板包括第一透光区域，所述第一透光区域用于形成次光阻间隔物，所述第一透光区域包括遮光部分，所述遮光部分的面积根据所述次光阻间隔物的预设高度设置的。
  16. 根据权利要求15所述的掩模板，其中所述遮光部分包括面积相等、形状相同的第一遮光部分以及第二遮光部分。
  17. 根据权利要求16所述的掩模板，其中所述第一遮光部分的面积以及所述第二遮光部分的面积的范围均为1平方微米至100平方微米。
  18. 根据权利要求16所述的掩模板，其中所述第一遮光部分和所述第二遮光部分的面积之和为所述第一透光区域面积的30%至40%。
  19. 根据权利要求16所述的掩模板，其中所述第一遮光部分与所述第二遮光部分之间的间距为1微米至10微米。
  20. 根据权利要求15所述的掩模板，其中所述次光阻间隔物的高度与所述遮光部分的面积成反比。
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