KR100230592B1 - Lcd and its fabrication method - Google Patents
Lcd and its fabrication method Download PDFInfo
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- KR100230592B1 KR100230592B1 KR1019960024497A KR19960024497A KR100230592B1 KR 100230592 B1 KR100230592 B1 KR 100230592B1 KR 1019960024497 A KR1019960024497 A KR 1019960024497A KR 19960024497 A KR19960024497 A KR 19960024497A KR 100230592 B1 KR100230592 B1 KR 100230592B1
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- liquid crystal
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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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
- G02F1/133784—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by rubbing
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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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
- G02F1/133723—Polyimide, polyamide-imide
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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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
-
- 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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
- G02F1/133757—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle with different alignment orientations
Abstract
본 발명은 시야각 특성을 향상시킬 수 있는 액정 표시 소자의 제조방법에 관한 것으로, 대향하는 상·하부 기판을 준비하는 단계; 상부 또는 하부 기판 상부에 제1배향막을 형성하는 단계; 제1배향막을 소정의 방향으로 제1러빙하는 단계; 제1러빙된 제1배향막 상부에 제2배향막을 형성하는 단계; 제2배향막을 상기 제1러빙 방향과 반대 방향으로 제2러빙하는 단계; 및, 제2러빙된 제2배향막을 패턴화하는 단계를 포함하는 것을 특징으로 한다.The present invention relates to a method for manufacturing a liquid crystal display device capable of improving viewing angle characteristics, comprising: preparing opposing upper and lower substrates; Forming a first alignment layer on the upper or lower substrate; First rubbing the first alignment layer in a predetermined direction; Forming a second alignment layer on the first rubbed first alignment layer; Second rubbing a second alignment layer in a direction opposite to the first rubbing direction; And patterning the second rubbed second alignment layer.
Description
제1a도 및 제1b도는 이중 도매인을 통하여 향상된 시야각 특성을 설명하기 위한 도면.1A and 1B are diagrams for explaining improved viewing angle characteristics through dual wholesalers.
제2a도 내지 제2f도는 일반적인 이중 도매인 액정 표시 소자의 제조방버버을 나타낸 단면도.2A to 2F are cross-sectional views showing a manufacturing breaker of a general double wholesale liquid crystal display device.
제3도는 러빙포를 이용한 일반적인 러빙을 나타낸 도면.3 is a view showing a general rubbing using a rubbing cloth.
제4a도 내지 제4e도는 본 발명의 일 실시예에 따른 이중 도매인 액정 표시 소자의 제조방법을 나타낸 단면도.4A through 4E are cross-sectional views illustrating a method of manufacturing a dual wholesale liquid crystal display device according to an exemplary embodiment of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
11 : 유리 기판 12 : 제1배향막11: glass substrate 12: first alignment film
13 : 제2배향막13: second alignment film
[발명의 분야][Field of Invention]
본 발명은 액정표시 소자의 제조방법에 관한 것으로, 특히 시야각을 향상시킬 수 있는 액정 표시 소자의 제조방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention 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 capable of improving a viewing angle.
[종래기술][Private Technology]
일반적으로, 액정 표시 소자는 전극이 형성된 두 장의 유리 기판 사이에 액정이 주입된 구조를 갖는다. 또한, 균일한 밝기와 높은 콘트라스트비를 갖는 액정 표시 소자를 만들기 위해서는 주입되는 액정 분자들을 일정한 방향으로 배열시키기 위하여 액정을 배향하게 된다. 이러한 배열에 의하여, 액정 분자들이 상·하의 유리기판면에 평행하게는 배열되지만, 전체의 분자배열은 두 기판 사이에서 연속적으로 변하도록 배열하는 트위스티드(twisted) 배향이 많이 사용된다.In general, the liquid crystal display device has a structure in which a liquid crystal is injected between two glass substrates on which electrodes are formed. In addition, in order to form a liquid crystal display device having uniform brightness and high contrast ratio, the liquid crystal is aligned to align the injected liquid crystal molecules in a predetermined direction. By this arrangement, the liquid crystal molecules are arranged in parallel to the upper and lower glass substrate surfaces, but a twisted orientation in which the entire molecular array is arranged so as to continuously change between the two substrates is used.
이 트위스티드 배향은 액정 분자가 상하의 유리 기판면에 평행하게 배열되나, 배열 방향이 양쪽 기판에서 90°차이가 있어서, 전체의 분자 배열이 두 기판 사이에서 연속적으로 90°변화가 생기도록 배열된다.In this twisted orientation, the liquid crystal molecules are arranged in parallel to the upper and lower glass substrate surfaces, but the arrangement direction is 90 degrees difference between both substrates, so that the entire molecular arrangement is arranged so that a 90 degree change occurs continuously between the two substrates.
한편, 액정 표시 소자는 액정셀에 전압을 인가하여 액정의 배열 상태를 변화시켜 액정셀의 광학적 성질을 변하도록하여 상(image)을 나타내는 전기광학적인 효과를 가진다. 이러한 액정 표시 소자의 전기광학 효과 중 전계 효과를 이용한 트위스티드 네메틱(Twisted Nematic ; 이하, TN이라 칭함) 방식의 액정이 있는데, 이 TN 방식 액정은 서로 직교하는 2매의 편광판 사이에 트위스티드 배향된 액정셀을 배치하여 전압 인가 유무에 따라 액정 표시 소자의 광투과 상태가 변하도록 하는 방식의 액정이다.On the other hand, the liquid crystal display device has an electro-optic effect of displaying an image by applying a voltage to the liquid crystal cell to change the arrangement state of the liquid crystal to change the optical properties of the liquid crystal cell. Among the electro-optic effects of the liquid crystal display device, there is a twisted nematic (TN) type liquid crystal using an electric field effect, which is a twisted oriented liquid crystal between two polarizing plates orthogonal to each other. It is a liquid crystal of a system in which the light transmission state of the liquid crystal display device is changed depending on whether or not a cell is disposed.
그런데, 한 기판에 단일 러빙하여 한 화소내의 액정을 한 방향으로만 일으키는 방식으로 상·하판의 러빙(Rubbing)시에, 상술된 TN 방식의 구조는 시야각이 한정되는 문제가 있게 된다. 따라서, 이러한 한정되는 시야각을 향상시키기 위하여 제1a도에 도시된 바와 같이, 상판(A) 및 하판(B)을 두 번 러빙하는 방법으로 한 화소가 분할 배향되는 이중 도메인 액정셀을 이용한다. 이와 같이, 상·하판을 두 번 러빙하였을 경우 제1b도에 도시된 바와 같이, 한 화소에 시야각 방향이 다른 두 개의 TN 구조가 형성됨으로써 시야각이 향상된다.However, when rubbing the upper and lower plates in such a manner that a single rubbing on one substrate causes the liquid crystal in one pixel only in one direction, the above-described TN structure has a problem that the viewing angle is limited. Therefore, in order to improve such a limited viewing angle, as shown in FIG. 1A, a double domain liquid crystal cell in which one pixel is dividedly oriented by a method of rubbing the upper plate A and the lower plate B twice is used. In this way, when the upper and lower plates are rubbed twice, as shown in FIG. 1B, two TN structures having different viewing angle directions are formed in one pixel, thereby improving the viewing angle.
이어서, 상술된 이중 도메인 액정 표시 소자의 제조방법을 제2a도 내지 제2f도를 참조하여 설명하면, 먼저 제2a도에 도시된 바와 같이, 상부 또는 하부의 유리 기판(1) 상부에 배향막(2)을 형성한 다음, 제2b도에 도시된 바와 같이, 제1러빙을 한다. 이어서, 제2c도에 도시된 바와 같이, 배향막(2) 상부에 포토레지스트막(3)을 도포한 후, 포토리소그라피의 일련 공정을 통하여 제2d도에 도시된 바와 같이, 배향막(2) 상부의 소정 영역에 패턴화된 마스크를 형성한다. 그런 다음, 제2e도에 도시된 바와 같이, 제1러빙 방향과 반대방향으로 제2러빙을 한 후, 제2f도에 도시된 바와 같이, 마스크를 제거함으로써, 이중 도매인 액정 표시소자를 제작한다.Next, the method of manufacturing the above-described dual domain liquid crystal display device will be described with reference to FIGS. 2A through 2F. First, as shown in FIG. 2A, the alignment layer 2 is disposed on the upper or lower glass substrate 1. ), And then first rubbing, as shown in FIG. 2B. Subsequently, as shown in FIG. 2C, the photoresist film 3 is applied on the alignment film 2, and then, as shown in FIG. 2D through a series of photolithography processes, as shown in FIG. 2D. A patterned mask is formed in a predetermined area. Then, as shown in FIG. 2E, the second rubbing is performed in a direction opposite to the first rubbing direction, and then, as shown in FIG. 2F, the mask is removed to fabricate a double wholesale liquid crystal display device.
[발명이 이루고자 하는 기술적 과제][Technical problem to be achieved]
그런데, 상술된 이중 도매인 액정 표시소자의 제조방법에 있어서는 다음과 같은 문제가 있게 된다.By the way, the following problem occurs in the manufacturing method of the above-mentioned dual wholesale liquid crystal display element.
즉, 제1러빙을 통하여 이미 한쪽 방향으로 러빙된 배향막을 제2e도에 도시된 바와 같이, 제2러빙을 통하여 반대 방향으로 다시 러빙하는데 있어서, 러빙된 부분에 안정한 배향상태를 얻기가 어려운 문제가 있게 된다. 또한, 제2러빙을 통하여 반대 방향으로 러빙할 때, 제3도에 도시된 바와 같이, 포토레지스트막이 러빙포(가)에 의해 뭉게져서 러빙포(가)가 오염될 뿐만 아니라, 러빙된 배향막에 포토레지스트가 묻어 클리닝시 제거되지 않게 됨에 따라, 액정 셀을 오염시키게 된다.That is, when rubbing the alignment film already rubbed in one direction through the first rubbing again in the opposite direction through the second rubbing, it is difficult to obtain a stable alignment state on the rubbed portion. Will be. In addition, when rubbing in the opposite direction through the second rubbing, as shown in FIG. 3, the photoresist film is agglomerated by the rubbing cloth to not only contaminate the rubbing cloth but also to the rubbed alignment film. As the photoresist gets buried and cannot be removed during cleaning, it contaminates the liquid crystal cell.
이에, 본 발명은 상술된 문제점을 감안하여 창출된 것으로서, 오염의 원인인 포토레지스트막을 사용하지 않고, 이 포토레지스트막 대신에 노광에 양반응을 일으키는 감광성 배향막을 사용함으로써, 반대 방향으로 러빙시 발생되는 오염의 문제을 방지함과 더불어, 러빙된 부분의 안정된 배향상태를 얻을 수 있는 액정 표시 소자의 제조방법을 제공함을 제공함에 그 목적이 있다.Accordingly, the present invention has been made in view of the above-described problems, and does not use a photoresist film that is a source of contamination, and instead of the photoresist film, a photosensitive alignment film that causes both reactions to exposure is generated when rubbing in the opposite direction. It is an object of the present invention to provide a method of manufacturing a liquid crystal display device capable of preventing a problem of contamination, and obtaining a stable alignment state of the rubbed portion.
[발명의 구성 및 작용][Configuration and Function of Invention]
상기된 목적을 달성하기 위한 본 발명에 따른 액정 표시 소자의 제조방법은 대향하는 상·하부 기판을 준비하는 단계; 상기 상부 또는 하부 기판 상부에 제1배향막을 형성하는 단계; 상기 제1배향막을 소정의 방향으로 제1러빙하는 단계; 상기 제1러빙된 제1배향막 상부에 제2배향막을 형성하는 단계; 상기 제2배향막을 상기 제1러빙 방향과 반대 방향으로 제2러빙하는 단계; 및, 상기 제2러빙된 제2배향막을 패턴화하는 단계를 포함하는 것을 특징으로 하고, 또한 제2배향막은 감광성 배향제(Photosensitive Polyimide)인 것을 특징으로 한다.According to an aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, the method comprising: preparing opposing upper and lower substrates; Forming a first alignment layer on the upper or lower substrate; First rubbing the first alignment layer in a predetermined direction; Forming a second alignment layer on the first rubbed first alignment layer; Second rubbing the second alignment layer in a direction opposite to the first rubbing direction; And patterning the second rubbed second alignment layer, and wherein the second alignment layer is a photosensitive polyimide.
상기된 구성에 의하면, 감광성 배향제를 제2배향막으로 사용함으로써, 제1러빙방향과 반대방향의 제2러빙시, 제1러빙된 층과는 전혀 접촉이 없기 때문에 안정된 배향 특성을 얻을 수 있게 될 뿐만 아니라, 러빙시 발생되는 오염 문제를 방지할 수 있게 된다.According to the above configuration, by using the photosensitive alignment agent as the second alignment film, when the second rubbing in the direction opposite to the first rubbing direction, there is no contact with the first rubbed layer, stable alignment characteristics can be obtained. In addition, it is possible to prevent the problem of contamination during rubbing.
[실시예]EXAMPLE
이하, 첨부된 도면을 참조하여 본 발명의 실시예를 설명한다.Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention.
제4a도 내지 제4e도는 본 발명의 일 실시예에 따른 이중 도매인 액정 표시 소자의 제조방법을 나타낸 단면도로서, 도면부호 11은 유리기판이고, 12는 제1배향막, 13은 제2배향막이다.4A through 4E are cross-sectional views illustrating a method of manufacturing a dual wholesale liquid crystal display device according to an exemplary embodiment of the present invention, wherein reference numeral 11 is a glass substrate, 12 is a first alignment layer, and 13 is a second alignment layer.
먼저, 제4a도에 도시된 바와 같이, 상부 또는 하부의 유리 기판(11) 상부에 제1배향막(12)을 형성한 다음, 제4b도에 도시된 바와 같이, 제1러빙을 한다. 이어성, 제4c도에 도시된 바와 같이, 제1배향막(12) 상부에 제2배향막(13)으로서 감광성 배향제(Photosensitive Polyimide)를 형성한다. 여기서, 감광성 배향제는 노광시 UV에 양반응을 일으킨다. 그런 다음, 제4d도에 도시된 바와 같이, 제1러빙 방향과 반대 방향으로 제2러빙을 한다. 그 후, 제2e도에 도시된 바와 같이, 노광 및 현상을 통한 포토리소그라피의 일련 공정으로 제2배향막(13)을 소정의 마스크 패턴으로 형성함으로써 이중도매인 액정 표시소자를 제조하게 된다.First, as shown in FIG. 4A, the first alignment layer 12 is formed on the upper or lower glass substrate 11, and then first rubbing is performed as shown in FIG. 4B. Then, as shown in FIG. 4C, a photosensitive alignment agent is formed as the second alignment layer 13 on the first alignment layer 12. Here, the photosensitive aligning agent causes a positive reaction to UV upon exposure. Then, as shown in FIG. 4D, the second rubbing is performed in the direction opposite to the first rubbing direction. Thereafter, as shown in FIG. 2E, the second alignment layer 13 is formed in a predetermined mask pattern by a series of photolithography through exposure and development to manufacture a double-whole liquid crystal display device.
[발명의 효과][Effects of the Invention]
상술된 실시예에 의하면, 노광에 양반응(Positive-workin)을 일으키는 감광성배향제를 사용하여 제1러빙방향과 반대방향의 제2러빙시, 제1러빙된 층과는 전혀 접촉이 없기 때문에 안정된 배향 특성을 얻을 수 있게 될 뿐만아니라, 러빙시 발생되는 오염 문제를 방지할 수 있게 됨에 따라, 액정 표시 소자의 시야각 특성이 개선되게 된다.According to the embodiment described above, when the second rubbing in the direction opposite to the first rubbing direction using a photosensitive alignment agent that causes positive-workin exposure, it is stable because there is no contact with the first rubbed layer. As well as obtaining the alignment characteristics, it is possible to prevent the contamination problem generated during rubbing, thereby improving the viewing angle characteristics of the liquid crystal display device.
또한, 본 발명은 상기 실시예에 한정되지 않고, 본 발명의 기술적 요지를 벗어나지 않는 범위에서 다양하게 변형시켜 실시할 수 있다.In addition, this invention is not limited to the said Example, It can variously deform and implement in the range which does not deviate from the technical summary of this invention.
이상 설명한 바와 같이 본 발명에 의하면, 시야각 특성을 향상시킬 수 있는 액정 표시 소자의 제조방법을 실현할 수 있게 된다.As explained above, according to this invention, the manufacturing method of the liquid crystal display element which can improve a viewing angle characteristic can be implement | achieved.
Claims (4)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960024497A KR100230592B1 (en) | 1996-06-27 | 1996-06-27 | Lcd and its fabrication method |
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| KR1019960024497A KR100230592B1 (en) | 1996-06-27 | 1996-06-27 | Lcd and its fabrication method |
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| KR100230592B1 true KR100230592B1 (en) | 1999-11-15 |
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| KR (1) | KR100230592B1 (en) |
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