JPS5844419A - Manufacture of liquid-crystal display device - Google Patents
Manufacture of liquid-crystal display deviceInfo
- Publication number
- JPS5844419A JPS5844419A JP14345781A JP14345781A JPS5844419A JP S5844419 A JPS5844419 A JP S5844419A JP 14345781 A JP14345781 A JP 14345781A JP 14345781 A JP14345781 A JP 14345781A JP S5844419 A JPS5844419 A JP S5844419A
- Authority
- JP
- Japan
- Prior art keywords
- sealing layer
- substrate
- substrates
- adhesive
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、液晶表示装置の製造方法に関するものであり
、特に二枚の基板のそれぞれに紫外線硬化型接着剤より
成るシーリング層を形成し、一方のシーリング層は予め
硬化させることによりスペーサーとしての機能を兼ねさ
せ、他方のシーリング層は二枚の基板を重ね合せたのち
硬化させることにより接着剤としての本来の役割を果さ
せ、液晶セルを形成する液晶表示装置の製造方法を提供
するものせある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a liquid crystal display device, and in particular, a sealing layer made of an ultraviolet curable adhesive is formed on each of two substrates, and one of the sealing layers is cured in advance. The other sealing layer is made to function as a spacer by overlapping the two substrates and then cured to fulfill its original role as an adhesive to form a liquid crystal display device. There is something that provides a method.
従来、いわゆる有機封止セルのシーリング層は、二枚の
基板のいずれか一方に形成されるのみであった。一般的
に有機接着剤によって被接着物を接着する時は、二枚の
被接着物の両方にそれぞれ有機接着剤−を塗布し、有機
接着剤間で接着が行なわれる様にすることが最善である
。しかしながら液晶セルを形成するに際して、二枚の゛
基板の両方に接着剤を塗布した場合には、基板を重ね合
わせて加圧して液晶セルを形成した後の基板間のギャッ
プが大きくなりやす（、またシーリング層の巾も広くな
りやすいことなどから、実際には行なわれていない。こ
のため、一方の基板だけに接着剤を塗布して形成されて
いる一般の有機封止セルは、湿度試験などＫより二枚の
基板が剥離しやすく、しかも最初に接着剤を塗布しなか
った基板と接着剤との境界面から剥離することが多い。Conventionally, the sealing layer of a so-called organic sealed cell has been formed only on one of two substrates. Generally, when bonding objects with an organic adhesive, it is best to apply the organic adhesive to each of the two objects so that the bonding occurs between the organic adhesives. be. However, when forming a liquid crystal cell, if adhesive is applied to both of the two substrates, the gap between the substrates tends to become large after the substrates are stacked and pressed to form the liquid crystal cell. In addition, it is not actually carried out because the width of the sealing layer tends to be wide.For this reason, general organic sealed cells that are formed by applying adhesive to only one substrate are not suitable for humidity tests, etc. The two substrates are more likely to separate than K, and moreover, separation often occurs from the interface between the adhesive and the substrate to which no adhesive was first applied.
このために１基板界面を活性化するべく基板上にシラン
カップリング剤を塗布し−たり−、直接、接着剤にシラ
ンカップリング剤を混入させたりすることがある。For this purpose, a silane coupling agent may be coated on the substrate to activate the interface between the substrates, or the silane coupling agent may be directly mixed into the adhesive.
しかし、この手法は二次的な改良法であり、先にの方法
には及ばないもの宅ある。However, this method is a secondary improvement method and is not as good as the previous method.
一方、無機ｉ止セルの製造方”法の中にも、二枚の基板
の両方にシーリング材（ガラス・フリット）を塗布して
から基板を重ね合せる方法がある。この場合、二枚の基
板ともシーリング材を塗布した状態ですぐに重ね合せる
方法と、一方の基板の側だけはシーリング材を仮焼成し
ておいて重ね合せる方法とがある。On the other hand, among the methods for manufacturing inorganic i-cells, there is a method in which a sealant (glass frit) is applied to both of the two substrates and then the substrates are stacked on top of each other. There are two methods: one is to immediately stack the two substrates with a sealant applied to them, and the other is to temporarily bake the sealant on only one side of the substrate and then stack them.
しかし、いずれの方法でも共通していることは、基板を
焼成する段階においては両基板のシーリン液晶セルのギ
ャップはコントロール出来ず、加圧焼成の結果、所定の
ギャップより小さくなってし・まり。一般にはこれを防
ぐためにシーリング材の中にガラスピーズなどのスペー
サーを混入して所定のギャップにプントロールする様に
しているが、そのためにコストが増加することになる。However, one thing that all methods have in common is that the gap between the sealing liquid crystal cells on both substrates cannot be controlled at the stage of firing the substrates, and as a result of pressure firing, the gap becomes smaller than the predetermined gap. Generally, in order to prevent this, a spacer such as glass beads is mixed into the sealing material and the spacer is inserted into a predetermined gap, but this increases the cost.
以上のように、いずれにしても従来行なろれている方法
では、接着強度か弱（、かつシーリング層の巾°の拡が
りがなく、低コストで所定のギャップが得られるもので
はなかった。As described above, in any case, with the conventional methods, the adhesive strength is weak (and the width of the sealing layer does not increase), and a predetermined gap cannot be obtained at low cost.
本発明は、これらの欠点をな（シ、接着強度が強く、か
つ低コストでギャップを均一に所定の値にすることので
きる液晶セルの製造方法を提供しようとするものである
。The present invention aims to overcome these drawbacks and provide a method for manufacturing a liquid crystal cell that has strong adhesive strength and can uniformly set the gap to a predetermined value at low cost.
以下１図に従って本発明の詳細な説明する。The present invention will be described in detail below with reference to FIG.
第１図は一方の基板ＩＫスクリーン印刷によりシーリン
グ層２を形成した状態を示す平面図、第２図は第１図の
断面図であるとともに、紫外線６を照射している状態を
も示している。Fig. 1 is a plan view showing a state in which a sealing layer 2 is formed by IK screen printing on one substrate, and Fig. 2 is a cross-sectional view of Fig. 1, and also shows a state in which ultraviolet rays 6 are irradiated. .
第３図は他方の基板１にスクリーン印刷によりシー Ｉ
Ｊング層２を形成した状態を示す平面図、第４図は第３
図の断、面図である。Figure 3 shows the sheet I printed on the other substrate 1 by screen printing.
FIG. 4 is a plan view showing the state in which the layer 2 is formed.
These are a cross section and a side view of the figure.
本発明では最初に一方の基板１にスクリーン印刷により
紫外線硬化型接着剤（以下ＵＶ接着剤という）より成、
るシーリング層２を形成する。この時、シーリング層２
は液晶セルの表示部の境界を示す見切り線４より外方に
印刷される。このシーリング層２の厚さは、液晶セルの
ギャップと等しく５〜１５μｍ程度に形成されるが、こ
の厚さのコントロールは２スクリーンのメツシュの選定
により行なわれる。スクリーンの・メツシュと印刷され
たシーリング層２の厚さとの関係は第８図の様になって
いるが、この関係はシーリング層２を形成するＵＶ接着
剤の粘弯には影響されない。In the present invention, first, one substrate 1 is made of an ultraviolet curable adhesive (hereinafter referred to as UV adhesive) by screen printing.
A sealing layer 2 is formed. At this time, sealing layer 2
is printed outward from the parting line 4 indicating the boundary of the display area of the liquid crystal cell. The thickness of the sealing layer 2 is formed to be about 5 to 15 μm, which is equal to the gap between the liquid crystal cells, and the thickness is controlled by selecting the meshes of the two screens. The relationship between the mesh of the screen and the thickness of the printed sealing layer 2 is as shown in FIG. 8, and this relationship is not affected by the viscosity of the UV adhesive forming the sealing layer 2.
この様にして形成されたシーリング層２は、紫外線照射
装置により第２図に示す様忙紫外線３の照射（以下、Ｕ
Ｖ照射という）を行なわれる。このＵＶ照射の時間は１
５秒〜５分であるが、普通は１分根度でよい。The sealing layer 2 thus formed is irradiated with ultraviolet rays 3 (hereinafter referred to as U
V irradiation) is performed. The duration of this UV irradiation is 1
The duration is 5 seconds to 5 minutes, but usually 1 minute is sufficient.
硬化して、一方の基板１との接着を完了するが、このシ
ーリング層２は液晶キルのギャップを決定するスペーサ
ーとしての機能を果たすことにな°る。After curing, adhesion to one substrate 1 is completed, and this sealing layer 2 functions as a spacer that determines the liquid crystal kill gap.
次いで他方の基・板１’ｚ、ｕｖ接着剤より成るシーリ
ング層２′をスクリーン印刷により第３′図、第４図に
示す様に形成する。このシーリング層２′は。Next, the other substrate/plate 1'z and a sealing layer 2' made of UV adhesive are formed by screen printing as shown in FIGS. 3' and 4. This sealing layer 2'.
一方の基板１のシーリング層２より一船外方に位置する
様に印刷されるために％第５図、第６図に示す様な配置
構成となし即ち、他方の基板１′のシーリング層２′が
一方の基板１のシーリング層２′と重なる巾（Ｂ）は、
一方の基板のシーリング層２自体の巾（Ａ）の２／３以
下となっている。Since the printing is performed so as to be located one distance outward from the sealing layer 2 of one substrate 1, the arrangement as shown in FIGS. 5 and 6 is not used, that is, the sealing layer 2 of the other substrate 1' The width (B) where ' overlaps with the sealing layer 2' of one substrate 1 is:
It is 2/3 or less of the width (A) of the sealing layer 2 itself of one of the substrates.
第５図は一方の基板１と他方の基板１が重ね合せられた
状態を示す断面図であり、第ｄ藺はそのシーリング層２
．２′の部分の拡大図であるが、実際の印刷されたシー
リング層２．２′の断面形状も、はぼこの様な形を成し
ている。FIG. 5 is a cross-sectional view showing the state in which one substrate 1 and the other substrate 1 are stacked, and the dth part is the sealing layer 2.
．． Although this is an enlarged view of the portion 2', the cross-sectional shape of the actual printed sealing layer 2.2' also has a hollow shape.
この様に重ね合せられた二枚の基板を加圧すると、第７
図に示す様になる。この時には、まだ他方の基板１のシ
ーリング層２は未硬化状態にあるので加圧と共に流動し
、一方の基板１のシーリン−外方へのはみ出し部２Ｃな
どを生じ、やがて側基板間のギャップが一方の基板１の
シーリング層２の厚さと略等しくなる状態で重ね合せが
終る。これは、このシーリンク層２がＵＶ照射により既
゛に硬化した状態にあってスペーサーとしての機能を果
たすからである。When the two substrates stacked in this way are pressed, the seventh
The result will be as shown in the figure. At this time, the sealing layer 2 of the other substrate 1 is still in an uncured state, so it flows as pressure is applied, causing the sealing layer 2C of one substrate 1 to protrude outward, and eventually the gap between the side substrates widens. The overlapping ends in a state where the thickness is approximately equal to the thickness of the sealing layer 2 of one of the substrates 1. This is because the sealing layer 2 is already hardened by UV irradiation and functions as a spacer.
ズした状態で重ね合せられるので、内方はみ出し部２′
ｂの量も極く少なく、第１図に示した見切り線４よりさ
らに内方にはみ出すようなことは全くない。この状態で
ＵＶ照射を行たい、他方の基板１′のシーリング層２′
を硬化させる。この時、他方の基板１′とシーリング層
２′の間の接着を完了すると同時に、一方の基板１とジ
−リング層２’、７ｉの基板１のシーリング層２とシー
リング層２との間の接着をも完了する。Since they are overlapped in a shifted state, the inward protruding portion 2'
The amount of b is also extremely small, and does not protrude further inward from the parting line 4 shown in FIG. In this state, you want to perform UV irradiation on the sealing layer 2' of the other substrate 1'.
harden. At this time, the adhesion between the other substrate 1' and the sealing layer 2' is completed, and at the same time, the adhesion between the one substrate 1 and the sealing layer 2', and the sealing layer 2 of the substrate 1 of 7i is completed. Also completes the gluing.
この様にして得られた液晶セルのシーリングについては
、最終的には二枚の基板１．１゛がそれぞれシーリング
層２．２を有する状態で接着が行なわれ、接着剤間の接
着となるので非常にシーリングの強度が強く、従来の如
く一方の基板のみにシーリング層を印刷した場合の様に
、シーリング層が印刷されなかった方の基板面で剥離が
生ずるというよ２なこともなくなる。Regarding the sealing of the liquid crystal cell obtained in this way, the two substrates 1.1' are finally bonded with each having a sealing layer 2.2, and the bonding is between the adhesives. The sealing strength is extremely strong, and unlike the conventional case where a sealing layer is printed on only one substrate, there is no possibility that the sealing layer will peel off on the side of the substrate on which it is not printed.
またＵＶ接着剤で一方の基板１のシーリング層２が形成
されていて、かつ予め硬化されているので、従来の様に
シーリング層中にギャップを蘇ったやの特別なスペーサ
ー材を混入しておく必要もない。Also, since the sealing layer 2 of one substrate 1 is formed with UV adhesive and has been cured in advance, a special spacer material that restores the gap is mixed into the sealing layer as in the past. There's no need.
リング層２′を、一方の基板１のシーリング層２の外方
にずらして印刷すれば、重ね合せ後でも従来、−の様に
見切り線の内側にまではみ出すこともない１、等の利点
がある。またＵＶ接着剤を用いたことにより接着剤゛の
硬化時間が短縮され、液晶セルのシーリング工程の所要
時間が著しく短くなった（従来の如くエポキシ系の接着
剤を用いた場合には。If the ring layer 2' is printed by shifting it outward from the sealing layer 2 of one of the substrates 1, there are advantages such as 1, which does not protrude to the inside of the parting line as in the conventional case even after overlapping. be. Furthermore, by using a UV adhesive, the curing time of the adhesive has been shortened, and the time required for sealing the liquid crystal cell has been significantly shortened (compared to conventional epoxy adhesives).
硬化所要時間が１〜３時間であるのに対して、ＵＶ接着
剤を用いた場合には数分間程度となる。）ことも、大き
な効果である。While the curing time required is 1 to 3 hours, when UV adhesive is used, it takes about several minutes. ) is also a big effect.
第１図〜第８図は、本発明に−よる液晶表示装置の製造
方法を説明するもので、第１図は一方の基板にシーリン
グ層を印刷した状態を示す平面図。
第２図は第１図の断面図、第３図、第４図は他方の基板
にシーリング層を形成した状態を示す平面図及び断面図
、第５図は二枚の基板を重ね合せた状態を示す側面図、
第６図は第５図の部分拡大図、第７図はシーリングの完
了状態を示す要部断面図、第８図はスクリーンメツシュ
とシーリング層の厚さとめ関係を示すグラフである。
１・・・・・・・・・・・・一方の基板。
１・・・・・・・・・・・・他方の基板。
２．２・・・・・・シーリンク層、
６・・・・・・・・・・・・紫外線、
第２図 第４図1 to 8 illustrate a method of manufacturing a liquid crystal display device according to the present invention, and FIG. 1 is a plan view showing a state in which a sealing layer is printed on one substrate. Figure 2 is a cross-sectional view of Figure 1, Figures 3 and 4 are a plan view and cross-sectional view showing a state in which a sealing layer is formed on the other substrate, and Figure 5 is a state in which the two substrates are stacked. A side view showing the
FIG. 6 is a partially enlarged view of FIG. 5, FIG. 7 is a sectional view of a main part showing a completed state of sealing, and FIG. 8 is a graph showing the relationship between the thicknesses of the screen mesh and the sealing layer. 1・・・・・・・・・・・・One board. 1・・・・・・・・・・・・The other board. 2.2...Sealink layer, 6......Ultraviolet light, Fig. 2 Fig. 4
Claims (1)
クリーン印刷により紫外線硬化型接着剤より成るシーリ
ング層を印刷する工程と、該シーリング層を紫外線照射
により予め硬化させておく工程と、他方の基板に紫外線
硬化型接着剤より成るシーリング層を、前記一方の基板
に印刷されたシーリング層よりもわずかに外方にずれた
位置にてスクリーン印刷により形成する工程と、しかる
後、前記二枚の基板を重ね合せて加圧した状態で。 紫外線を照射することにより、前記一方の基板の予め硬
化されているシーリング層をスペーサ２′トしながら、
前記他方の基板のシーリング層を硬化させて、二枚の基
板を所定のギャップを介して接着させる工程とを備えた
ことを特徴とする液晶−水装置の製造方法。[Claims] A step of printing a sealing layer made of an ultraviolet curable adhesive on one of two transparent substrates having electrodes by screen printing, and curing the sealing layer in advance by irradiating ultraviolet rays. a step of forming a sealing layer made of an ultraviolet curable adhesive on the other substrate by screen printing at a position slightly shifted outward from the sealing layer printed on the one substrate; After that, the two substrates were overlapped and pressed. While irradiating the spacer 2' with the pre-cured sealing layer of the one substrate by irradiating it with ultraviolet rays,
A method for manufacturing a liquid crystal-water device, comprising the step of curing the sealing layer of the other substrate and bonding the two substrates with a predetermined gap therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14345781A JPS5844419A (en) | 1981-09-11 | 1981-09-11 | Manufacture of liquid-crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14345781A JPS5844419A (en) | 1981-09-11 | 1981-09-11 | Manufacture of liquid-crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5844419A true JPS5844419A (en) | 1983-03-15 |
Family
ID=15339143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14345781A Pending JPS5844419A (en) | 1981-09-11 | 1981-09-11 | Manufacture of liquid-crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5844419A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6283720A (en) * | 1985-10-08 | 1987-04-17 | Dainippon Ink & Chem Inc | Liquid crystal display element |
| US5198148A (en) * | 1989-06-17 | 1993-03-30 | Shinko Electric Works Co., Ltd. | Cholesteric liquid crystal composition, color-forming liquid crystal composite product, method for protecting liquid crystal and color-forming liquid crystal picture laminated product |
| JPH08313920A (en) * | 1983-12-01 | 1996-11-29 | Seiko Epson Corp | Production of color liquid crystal device |
-
1981
- 1981-09-11 JP JP14345781A patent/JPS5844419A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08313920A (en) * | 1983-12-01 | 1996-11-29 | Seiko Epson Corp | Production of color liquid crystal device |
| JPS6283720A (en) * | 1985-10-08 | 1987-04-17 | Dainippon Ink & Chem Inc | Liquid crystal display element |
| JPH0588804B2 (en) * | 1985-10-08 | 1993-12-24 | Dainippon Ink & Chemicals | |
| US5198148A (en) * | 1989-06-17 | 1993-03-30 | Shinko Electric Works Co., Ltd. | Cholesteric liquid crystal composition, color-forming liquid crystal composite product, method for protecting liquid crystal and color-forming liquid crystal picture laminated product |
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