KR100453363B1 - Method for manufacturing liquid crystal display device - Google Patents

Method for manufacturing liquid crystal display device Download PDF

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Publication number
KR100453363B1
KR100453363B1 KR10-2001-0056861A KR20010056861A KR100453363B1 KR 100453363 B1 KR100453363 B1 KR 100453363B1 KR 20010056861 A KR20010056861 A KR 20010056861A KR 100453363 B1 KR100453363 B1 KR 100453363B1
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South Korea
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photosensitive polymer
liquid crystal
layer
crystal display
display device
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KR10-2001-0056861A
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Korean (ko)
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KR20030027206A (en
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박태규
김향율
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비오이 하이디스 테크놀로지 주식회사
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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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G02F1/133516—Methods for their manufacture, e.g. printing, electro-deposition or photolithography
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Liquid Crystal (AREA)

Abstract

본 발명은 제조수율과 생산성을 향상시킬 수 있는 액정표시장치의 제조방법을 개시한다. 개시된 본 발명에 따른 액정표시장치의 제조방법은, 기판 상에 블랙매트릭스를 형성하는 단계와, 상기 블랙매트릭스간의 영역에 적색, 녹색 및 청색의 착색층을 형성하는 단계와, 상기 블랙매트릭스 및 착색층을 포함한 기판의 전면 상에 감광성 폴리머를 도포하는 단계와, 상기 감광성 폴리머를 하프톤(Half tone) 노광하는 단계와, 상기 하프톤 노광된 감광성 폴리머를 현상하여 오버코팅막, 지주 스페이서 및 배향막의 역할을 겸하는 다기능층을 형성하는 단계를 포함하는 것을 특징으로 한다.The present invention discloses a method of manufacturing a liquid crystal display device capable of improving production yield and productivity. According to an aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, the method comprising: forming a black matrix on a substrate, forming a red, green, and blue colored layer in a region between the black matrices, and forming the black matrix and the colored layer. Coating a photosensitive polymer on the entire surface of the substrate including the photosensitive polymer, halftone exposing the photosensitive polymer, and developing the halftone exposed photosensitive polymer to serve as an overcoating layer, a strut spacer, and an alignment layer. Characterized in that it comprises the step of forming a multifunctional layer.

Description

액정표시장치의 제조방법{METHOD FOR MANUFACTURING LIQUID CRYSTAL DISPLAY DEVICE}Manufacturing method of liquid crystal display device {METHOD FOR MANUFACTURING LIQUID CRYSTAL DISPLAY DEVICE}

본 발명은 액정표시장치의 제조방법에 관한 것으로, 보다 상세하게는, 감광성 폴리머를 하프톤 노광해서 상기 감광성 폴리머가 오버코팅막, 지주 스페이서 및 배향막의 역할을 겸할 수 있도록 하는 액정표시장치의 제조방법에 관한 것이다.The present invention relates to a method for manufacturing a liquid crystal display device, and more particularly, to a method for manufacturing a liquid crystal display device in which the photosensitive polymer is halftone-exposed so that the photosensitive polymer can also function as an overcoating film, a strut spacer, and an alignment film. It is about.

일반적으로, 액정표시장치(LCD)는 고정세화, 고개구율화 및 경량박형화 등의 우수한 특성으로 인하여 종래의 음극선관(CRT)을 대신하여 각종의 디스플레이 기기 등에 활용되고 있다.In general, liquid crystal displays (LCDs) are used in various display devices in place of conventional cathode ray tubes (CRTs) due to excellent characteristics such as high definition, high opening ratio, and light weight.

이러한 액정표시장치는 스위칭 소자와 전계형성 전극이 형성되는 어레이 기판과 각종의 컬러를 구현하는 컬러필터 기판이 액정층을 사이에 두고 합착되어 있는 구조로 되어 있다. 따라서, 상기 전극간의 전계 형성에 따라 액정층내의 액정이 트위스트되어 광을 누설하고, 컬러필터층에 의하여 컬러 화면이 실현되는 것이다.The liquid crystal display device has a structure in which an array substrate on which a switching element and a field forming electrode are formed, and a color filter substrate implementing various colors are bonded to each other with a liquid crystal layer interposed therebetween. Therefore, as the electric field is formed between the electrodes, the liquid crystal in the liquid crystal layer is twisted to leak light, and a color screen is realized by the color filter layer.

종래의 액정표시장치의 제조방법에 있어서는, 상기 액정층내에 액정셀갭, 즉 어레이 기판과 컬러필터 기판간의 간격을 유지시키기 위하여 스페이서(Spacer)를 형성하는데, 빛샘, 배향막 표면 손상, 셀갭 불균일 등 단점을 극복하고자, 예를 들어, 기둥모양의 스페이서(지주 스페이서)를 형성시키는 것이 최근의 경향이다.In the conventional manufacturing method of the liquid crystal display device, a spacer is formed in the liquid crystal layer to maintain the gap between the liquid crystal cell gap, that is, the array substrate and the color filter substrate, and has disadvantages such as light leakage, surface damage of the alignment layer, and uneven cell gap. To overcome, it is a recent trend to form, for example, columnar spacers (holder spacers).

이러한 관점에서, 컬러필터 기판을 제조하기 위한 종래 기술에 따른 액정표시장치의 제조방법은, 도 1에 도시된 바와 같이, 컬러필터 기판(10)상에 블랙 매트릭스(12), 착색층(14), 오버코팅막(16), 및 지주 스페이서(18)를 순차로 형성한 다음, 소정의 롤러장치(19)로 배향막(20)을 형성한다.In this regard, the manufacturing method of the liquid crystal display device according to the prior art for manufacturing the color filter substrate, as shown in Figure 1, the black matrix 12, the colored layer 14 on the color filter substrate 10 , The overcoating film 16 and the strut spacers 18 are sequentially formed, and then the alignment film 20 is formed by a predetermined roller device 19.

그러나, 상기 종랙 기술에 따른 액정표시장치의 제조방법에 있어서는 다음과 같은 문제점이 있다.However, the manufacturing method of the liquid crystal display device according to the vertical technique has the following problems.

종래 기술에 의하면, 지주 스페이서 형성 단계가 별도로 추가되고, 또한 배향막 형성시 상기 지주 스페이서 부근 영역에는 배향막 형성 불량 영역이 발생한다는 문제점이 있다.According to the prior art, a step of forming a spacer spacer is added separately, and there is a problem in that an alignment layer formation defective region occurs in a region near the pillar spacer when the alignment layer is formed.

이에, 본 발명은 상기한 종래 기술의 문제점을 해결하기 위해 안출된 것으로, 지주 스페이서 형성 단계가 별도로 추가됨에 따른 단점을 개선하면서 상기 지주 스페이서 부근 영역에서 배향막 형성 불량이 발생됨을 방지할 수 있는 액정표시장치의 제조방법을 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above-described problems of the prior art, the liquid crystal display that can prevent the formation of an alignment film in the region adjacent to the support spacer while improving the disadvantages of the additional step of forming the support spacer separately. It is an object to provide a method of manufacturing the device.

도 1은 종래 기술에 따른 액정표시장치의 제조방법을 설명하기 위한 단면도.1 is a cross-sectional view illustrating a method of manufacturing a liquid crystal display device according to the prior art.

도 2a 내지 2c는 본 발명에 따른 액정표시장치의 제조방법을 도시한 공정별 단면도.2A to 2C are cross-sectional views of processes illustrating a method of manufacturing a liquid crystal display device according to the present invention.

도 3은 본 본 발명에 따른 액정표시장치의 제조방법에 있어서, 하프톤 마스크를 도시한 평면도.3 is a plan view showing a halftone mask in the method of manufacturing a liquid crystal display device according to the present invention;

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

100: 기판 120: 블랙매트릭스100: substrate 120: black matrix

140: 착색층 160: 감광성 폴리머140: colored layer 160: photosensitive polymer

170: 하프톤 마스크 180: 지주 스페이서 역할층170: halftone mask 180: prop spacer role layer

200: 배향막 역할층 220: 다기능층200: alignment layer role layer 220: multifunctional layer

상기와 같은 목적을 달성하기 위하여, 본 발명은, 기판 상에 블랙매트릭스를 형성하는 단계와, 상기 블랙매트릭스간의 영역에 적색, 녹색 및 청색의 착색층을 형성하는 단계와, 상기 블랙매트릭스 및 착색층을 포함한 기판의 전면 상에 감광성 폴리머를 도포하는 단계와, 상기 감광성 폴리머를 하프톤(Half tone) 노광하는 단계와, 상기 하프톤 노광된 감광성 폴리머를 현상하여 오버코팅막, 지주 스페이서 및 배향막의 역할을 겸하는 다기능층을 형성하는 단계를 포함하는 액정표시장치의 제조방법을 제공한다.(실시예)In order to achieve the above object, the present invention, forming a black matrix on a substrate, forming a red, green and blue colored layer in the region between the black matrix, the black matrix and colored layer Coating a photosensitive polymer on the entire surface of the substrate including the photosensitive polymer, halftone exposing the photosensitive polymer, and developing the halftone exposed photosensitive polymer to serve as an overcoating layer, a strut spacer, and an alignment layer. It provides a method for manufacturing a liquid crystal display device comprising the step of forming a multi-functional layer also serves.

이하, 본 발명에 따른 액정표시장치의 제조방법을 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, a method of manufacturing a liquid crystal display according to the present invention will be described in detail with reference to the accompanying drawings.

도 2a 내지 2c는 본 발명에 따른 액정표시장치의 제조방법을 도시한 공정별 단면도이고, 도 3은 본 발명에 따른 액정표시장치의 제조방법에 있어서 하프톤 마스크를 도시한 평면도이다.2A through 2C are cross-sectional views illustrating a method of manufacturing a liquid crystal display device according to the present invention, and FIG. 3 is a plan view illustrating a halftone mask in the method of manufacturing a liquid crystal display device according to the present invention.

본 발명에 따른 액정표시장치의 제조방법은, 도 2a에 도시된 바와 같이, 기판(100)상에 블랙매트릭스(120)를 일정거리 만큼 이격되게 형성한다. 이때, 상기 블랙매트릭스(120)는 수지 또는 금속류 재질, 예를 들어, 크롬(Cr)으로 형성한다.In the method of manufacturing the liquid crystal display according to the present invention, as shown in FIG. 2A, the black matrix 120 is formed on the substrate 100 so as to be spaced apart by a predetermined distance. In this case, the black matrix 120 is formed of a resin or metal material, for example, chromium (Cr).

그런 다음, 상기 일정거리 만큼 이격되어 형성된 블랙매트릭스(120)간의 영역에 착색층(140)을 형성한다. 상기 착색층(140)은 컬러 화면을 구현하기 위한 것으로 빛의 삼원색인 적색, 녹색 및 청색 안료로 형성한다.Then, the colored layer 140 is formed in the area between the black matrix 120 formed to be spaced apart by the predetermined distance. The colored layer 140 is for realizing a color screen and is formed of red, green, and blue pigments, which are three primary colors of light.

한편, 도시하지 않았지만, 후술하는 바와 같이 하기 감광성 폴리머(160) 도포 이전에 상기 착색층(140) 상에 투명전극을 형성할 수 있다. 또한, 정전기 발생을 방지하기 위하여 상기 기판(100)의 배면에 투명전극을 형성할 수 있다.Although not shown, a transparent electrode may be formed on the colored layer 140 before the photosensitive polymer 160 is coated as described below. In addition, a transparent electrode may be formed on the rear surface of the substrate 100 to prevent static electricity.

이어서, 도 2b에 도시된 바와 같이, 블랙매트릭스(120) 및 착색층(140) 전면 상에 감광성 폴리머(160:Polymer)를 도포한다. 상기 감광성 폴리머(160)는 양성 감광성 또는 음성 감광성중 임의의 하나를 선택하며, 본 발명에 있어서는 음성 폴리머(160)를 적용하며, 양성 폴리머를 사용하여도 그 작용과 효과는 동일하다.Subsequently, as shown in FIG. 2B, a photosensitive polymer 160 (Polymer) is coated on the entire surface of the black matrix 120 and the colored layer 140. The photosensitive polymer 160 selects any one of positive photosensitive or negative photosensitive, and in the present invention, the negative polymer 160 is applied, and the same effects and effects are obtained even when a positive polymer is used.

그런 다음, 상기 도포된 감광성 폴리머(160) 상에 하프톤 마스크(170)를 이용해서 상기 감광성 폴리머(160)를 하프톤 노광시킨다.Thereafter, the photosensitive polymer 160 is halftone exposed using the halftone mask 170 on the coated photosensitive polymer 160.

이때, 상기 하프톤 마스크(170)는, 도 3에 도시된 바와 같이, 수많은 격자로 이루어져 있는데 그 격자중 지주 스페이서 형성용 격자(170a)의 간격은 착색층(140)의 용도와 형태에 따라서 임의로 변화할 수 있으며, 또한 나머지 수개의 격자(170b)의 밀도는 배향막 역할을 하는 부위(200)의 두께 조절을 위하여 임의로 조정될 수 있다.At this time, the halftone mask 170, as shown in Figure 3, is composed of a number of gratings, the interval of the grating 170a for forming the strut spacer of the grating arbitrarily according to the use and shape of the colored layer 140 In addition, the density of the remaining several gratings 170b may be arbitrarily adjusted to adjust the thickness of the region 200 serving as the alignment layer.

이어서, 도 2c에 도시된 바와 같이, 상기 하프톤 노광된 감광성 폴리머(160)를 현상하여 지주 스페이서 역할층(180)과 배향막 역할층(200)을 비롯한 오버코팅막 역할을 겸하는 다기능층(220)을 형성한다.Subsequently, as shown in FIG. 2C, the halftone-exposed photosensitive polymer 160 is developed to serve as an overcoating layer including the post spacer role layer 180 and the alignment layer role layer 200. Form.

본 발명의 원리와 정신에 위배되지 않는 범위에서 여러 실시예는 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 자명할 뿐만 아니라 용이하게 실시할 수 있다. 따라서, 본원에 첨부된 특허청구범위는 이미 상술된 것에 한정되지 않으며, 하기 특허청구범위는 당해 발명에 내재되어 있는 특허성 있는 신규한 모든 사항을 포함하며, 아울러 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해서 균등하게 처리되는 모든 특징을 포함한다.Various embodiments can be easily implemented as well as self-explanatory to those skilled in the art without departing from the principles and spirit of the present invention. Accordingly, the claims appended hereto are not limited to those already described above, and the following claims are intended to cover all of the novel and patented matters inherent in the invention, and are also common in the art to which the invention pertains. Includes all features that are processed evenly by the knowledgeable.

이상에서 설명한 바와 같이, 본 발명에 따른 액정표시장치의 제조방법에 있어서는 다음과 같은 효과가 있다.As described above, the manufacturing method of the liquid crystal display device according to the present invention has the following effects.

본 발명에 있어서는, 감광성 폴리머를 하프톤 노광해서 상기 감광성 폴리머가 오버코팅막, 지주 스페이서 및 배향막의 역할을 겸하도록 함으로써 상기 지주 스페이서 부근에서 배향막 형성 불량이 발생되는 것을 방지할 수 있다.In the present invention, the photosensitive polymer is halftone-exposed so that the photosensitive polymer also serves as an overcoating film, a post spacer, and an alignment film, thereby preventing the formation of an alignment film in the vicinity of the post spacer.

또한, 본 발명에 있어서는 감광성 폴리머의 도포, 이에 대한 하프톤 노광 및 현상을 통해 오버코팅막과 지주 스페이서 및 배향막을 동시에 형성할 수 있으므로, 상기 구성요소들을 별개의 공정들로 각각 형성해야 하는 종래 기술과 비교해서 공정 단계가 감소되므로 제조시간 및 비용을 줄일 수 있으며, 그래서, 제조수율과 생산성을 향상시킬 수 있다.In addition, in the present invention, since the overcoating film, the post spacer, and the alignment film may be simultaneously formed through the application of the photosensitive polymer, the halftone exposure and the development thereof, the above-described prior art that the components must be formed in separate processes, and In comparison, process steps are reduced, thereby reducing manufacturing time and costs, and thus improving production yield and productivity.

Claims (5)

기판 상에 블랙매트릭스를 형성하는 단계;Forming a black matrix on the substrate; 상기 블랙매트릭스간의 영역에 적색, 녹색 및 청색의 착색층을 형성하는 단계;Forming red, green, and blue colored layers in the region between the black matrices; 상기 블랙매트릭스 및 착색층을 포함한 기판의 전면 상에 감광성 폴리머를 도포하는 단계;Applying a photosensitive polymer onto the entire surface of the substrate including the black matrix and the colored layer; 상기 감광성 폴리머를 하프톤 노광하는 단계; 및Halftone exposing the photosensitive polymer; And 상기 하프톤 노광된 감광성 폴리머를 현상하여 오버코팅막, 지주 스페이서 및 배향막의 역할을 겸하는 다기능층을 형성하는 단계를 포함하는 것을 특징으로 하는 액정표시장치의 제조방법.And developing the halftone-exposed photosensitive polymer to form a multifunctional layer which functions as an overcoating layer, a strut spacer, and an alignment layer. 제1항에 있어서,The method of claim 1, 상기 감광성 폴리머는 양성 감광성 폴리머 또는 음성 감광성 폴리머인 것을 특징으로 하는 액정표시장치의 제조방법.And the photosensitive polymer is a positive photosensitive polymer or a negative photosensitive polymer. 제1항에 있어서,The method of claim 1, 상기 기판에 투명전극을 형성하는 단계를 더 포함하는 것을 특징으로 하는 액정표시장치의 제조방법.Forming a transparent electrode on the substrate further comprising the step of manufacturing a liquid crystal display device. 제3항에 있어서,The method of claim 3, 상기 투명전극은 상기 감광성 폴리머 도포 이전에 상기 착색층 상에 형성하는 것을 특징으로 하는 액정표시장치의 제조방법.And the transparent electrode is formed on the colored layer prior to coating the photosensitive polymer. 제3항에 있어서,The method of claim 3, 상기 투명전극은 상기 기판의 배면 상에 형성하는 것을 특징으로 하는 액정표시장치의 제조방법.And the transparent electrode is formed on the rear surface of the substrate.
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KR970002407A (en) * 1995-06-19 1997-01-24 윤종용 Liquid crystal display device with enhanced cell gap retention and manufacturing method thereof
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KR970002407A (en) * 1995-06-19 1997-01-24 윤종용 Liquid crystal display device with enhanced cell gap retention and manufacturing method thereof
KR20000029598A (en) * 1997-05-26 2000-05-25 모리시타 요이찌 Liquid crystal alignment film, method of producing the same, liquid crystal display made by using the film, and method of producing the same

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