JP4009074B2 - Printing plate for transferring sealant for bonding liquid crystal substrates - Google Patents

Printing plate for transferring sealant for bonding liquid crystal substrates Download PDF

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JP4009074B2
JP4009074B2 JP2001213485A JP2001213485A JP4009074B2 JP 4009074 B2 JP4009074 B2 JP 4009074B2 JP 2001213485 A JP2001213485 A JP 2001213485A JP 2001213485 A JP2001213485 A JP 2001213485A JP 4009074 B2 JP4009074 B2 JP 4009074B2
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sealant
linear
liquid crystal
relief portion
printing plate
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JP2003029271A (en
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勇一 小村
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Komura-Tech Co Ltd
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Komura-Tech Co Ltd
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Priority to TW91115520A priority patent/TW574576B/en
Priority to KR1020020040645A priority patent/KR100880345B1/en
Priority to CNB021406944A priority patent/CN1281411C/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/26—Printing on other surfaces than ordinary paper
    • B41M1/34—Printing on other surfaces than ordinary paper on glass or ceramic surfaces
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

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

Description

【０００１】
【発明の属する技術分野】
本発明は、液晶基盤を貼り合わせるためのシール剤を、液晶基盤に転写するのに用いる印刷版に関するものである。
【０００２】
【従来の技術】
一般的に、液晶表示装置は、以下のようにして作成されている。即ち、ガラス基盤１の一定区画内に配向膜３を設け、この配向膜３に所定の表面加工を行う。その後、この配向膜３を囲繞するようにシール剤２を設ける。そして、この一対をシール剤２同士が当接するようにして、貼り合わせる。その後、注入口４から液晶を注入し、封入して液晶表示装置を得るのである。
【０００３】
従来より、シール剤２を設ける方法としては、例えば、スクリーン印刷法が採用されている。即ち、スクリーン（メッシュ織物等のメッシュ状物）を用いて、シール剤２を滲出させる部分以外の箇所を目止めし、シール剤２のみを滲出させて、所定の部分にシール剤２を設けるのである。しかし、この方法は、スクリーンが配向膜３に接触し、配向膜３を傷付ける恐れがあった。特に、表面加工された配向膜３が傷付くと、液晶が均一に定着せず、液晶表示が均一乃至は均質にならないという欠点を惹起する。
【０００４】
こため、スクリーン印刷に代えてディスペンサー塗布法も採用されている。ディスペンサー塗布法は、シール剤２の押出機（注射器のようなもの）を用いて、所定の部分のみにシール剤２を塗布してゆくのである。この方法は、配向膜３と押出機とが接触することはなく、配向膜３を傷付けることはない。しかしながら、押出機を所定の部分に移動させながら、シール剤２を塗布しなければならず、シール剤２の塗布に時間がかかる、即ち、移動時間がかかるという欠点があった。従って、スクリーン印刷法に比べて、液晶表示装置の作成が短時間で行えず、合理的ではないという憾みがあった。
【０００５】
【発明が解決しようとする課題】
そこで、本発明者等は、凸版印刷法によって、シール剤２を印刷・転写すれば良いと考えた。凸版印刷法は、レリーフ部と、レリーフ部を支持する支持体とよりなる印刷版を用い、レリーフ部の先端面に印刷インキ等を塗布し、これを被印刷面に転写する方法である。従って、レリーフ部以外の箇所が、被印刷面に接触することはなく、配向膜３を傷付ける恐れはない。しかしながら、凸版印刷法によって、レリーフ部の先端面にシール剤を塗布し、これをガラス基盤に転写すると、転写量が少なく、所定の転写高さを得られないということがあった。即ち、所定の転写高さが得られないと、基盤を貼り合わせて液晶表示装置を作成した場合、基盤間の間隙が小さくなり、所望量の液晶を封入できないということがあった。また、転写量が少ないため、シール剤が転写されない箇所が生じるということもあった。即ち、転写されない箇所が存在すると、この部分には空気が残存し、雰囲気温度によって空気が膨張し、得られた液晶表示装置の貼り合わせ部が剥離し、液晶が漏れ出るということもあった。更に、転写されたシール剤の端縁にギザギザが生じ、シール剤の鮮鋭な転写が行えず、配向膜にシール剤が付着するというようなこともあった。
【０００６】
本発明者等は、上記した欠点を解決するためには、レリーフ部の先端面に凹部を設け、この凹部にシール剤を供給することにより、シール剤の塗布量を多くすれば、転写量が少なくなるという欠点を防止しうると考えた。そして、現実にレリーフ部の先端面に特定の凹部を設けて、実験を行ったところ、転写量を多くすることができると共に、予期せぬことに、シール剤が転写されない箇所が生じることもなく、しかも、シール剤の鮮鋭な転写も実現しうることが判明した。本発明は、このような知見に基づくものである。
【０００７】
【課題を解決するための手段】
即ち、本発明は、シール剤を塗布するための先端面を具備した、略四辺形の線状レリーフ部と、該線状レリーフ部を支持するための支持体とが一体化されてなり、該線状レリーフ部の該先端面には、該線状レリーフ部の長手方向に沿って、該先端面の両端縁以外の領域に１本、２本及び３本のいずれか一の線状凹部が設けられており、かつ、該両端縁には凹部が設けられておらず、該線状凹部には、該シール剤の塗布時に該シール剤が充填されることを特徴とする液晶基盤貼り合わせ用シール剤を転写するための印刷版に関するものである。
【０００８】
本発明に係る印刷版は、支持体１１とレリーフ部１２とで構成されている。この支持体１１とレリーフ部１２とは、一体化されており、一般的に硬化した感光性樹脂で形成されている。感光性樹脂としては、従来公知のものが用いられ、例えば、旭化成工業株式会社製の各種のＡＰＲ樹脂を用いることができる。支持体１１の厚さは、一般的に１〜３ｍｍ程度である。また、レリーフ部１２の厚さ（高さ）は、一般的に０．５〜１．５ｍｍ程度である。
【０００９】
レリーフ部１２の先端面は、シール剤を塗布し、このシール剤を基盤１上に転写するためのものである。従って、レリーフ部１２の先端面は、基盤１上に設けられるシール剤２の形態と同一の形状となっている。具体的には、シール剤２は、線状で配向膜３を囲繞する形態となっており、略四辺形となっている。従って、レリーフ部１２の先端面も、線状で配向膜３を囲繞する形状となっており、略四辺形になっている。レリーフ部１２の先端面は幅が狭く線状となっているので、本発明においては、線状レリーフ部１２と表現されている。レリーフ部１２の先端面の幅は、一般的に２００〜４００μｍである。先端面の幅が２００μｍ未満であると、転写されるシール剤の幅も約２００μｍ以下となり、シール強度が低下する恐れがある。また、先端面の幅が４００μｍを超えると、シール剤の幅が広い分、液晶表示装置が大きくなるので、好ましくない。なお、図３では、レリーフ部１２の先端面と、支持体１１との一体化部とが略同一幅となっているが、一般的には一体化部の方が幅が広くなっている。
【００１０】
本発明において重要なことは、レリーフ部１２の先端面に、線状レリーフ部１２の長手方向に沿って、１本、２本及び３本のいずれか一の線状凹部１３が設けられていることである。この線状凹部１３は、線状レリーフ部１２の先端面の両端縁以外の領域に設けられている。すなわち、図３に示すように、線状レリーフ部１２の先端面の中央部に設けられている。この線状凹部１３に、塗布したシール剤が充填されると共に、線状凹部１３以外の面にもシール剤が乗るのである。線状凹部１３は、１本でも２本でもよく、また３本でも差し支えないが、最も好ましいのは３本である。この理由は定かではないが、基盤１に転写されるシール剤２が均一となりやすいからである。
【００１１】
線状凹部１３は、線状レリーフ部１２の先端面の両端縁以外の領域に設けられており、この両端縁以外の領域には、凹部を設けない。凹部を設けると、この部分にシール剤が充填され、転写されたシール剤の端縁にギザギザが生じ、シール剤の鮮鋭な転写が行えない。
【００１２】
線状凹部１３の深さは、任意であるが、５〜５０μｍ程度が好ましい。深さが５μｍ未満であると、シール剤の充填量が少なくなり、転写量が少なくなる恐れがある。また、深さが５０μｍを超えると、複数の凹部を設けることが困難となる。例えば、１本の線状凹部１３の場合であると、深さ５０μｍを超えるものを得ることはできるが、この場合には、転写されたシール剤の均一性が低下する傾向がある。また、レリーフ部１２の先端面に形成された線状凹部１３の総体積は、線状レリーフ部の１ｍｍ長さ当たり、７．００×１０-4ｍｍ3〜３．００×１０-2ｍｍ3程度であるのが好ましい。
【００１３】
以上説明した印刷版を用いて、印刷版面にシール剤を塗布する。印刷版面は、レリーフ部１２の先端面であるから、この面にシール剤が塗布される。そうすると、先端面には線状凹部１３が形成されているから、シール剤は、この線状凹部１３にも充填される。この後、この印刷版を基盤に当接させれば、塗布されたシール剤を基盤に印刷（転写）することができるのである。なお、シール剤としては、従来公知のものであれば、どのようなものでも使用でき、代表的にはエポキシ系樹脂を用いるのが好ましい。また、シール剤の粘度についても特に制限はないが、好ましくは２０，０００〜４０，０００センチポイズのものを用いるのが良い。
【００１４】
【実施例】
以下、実施例に基づいて本発明を説明するが、本発明は実施例に限定されるものではない。本発明は、印刷版の線状レリーフ部の先端面に、線状レリーフ部の長手方向に沿って、先端面の両端縁以外の領域に１〜３本の線状凹部を設けると、液晶基盤の貼り合わせ用シール剤を比較的多量に且つ均一に液晶基盤に転写することができ、しかもシール剤の鮮鋭な転写が行えるという知見に基づくものであるとして、解釈されるべきである。
【００１５】
実施例１
液状感光性樹脂（旭化成工業株式会社製：ＡＰＲ樹脂Ｋ−１１）を、枠内に流し込んだ後、支持体となる側から７０秒間全面的に露光し、液状感光性樹脂を硬化させて支持体を得た。次に、レリーフ部となる側から、ネガフィルムを通して６５秒間露光し、レリーフ部を得た。その後、アルカリ界面活性剤水溶液（旭化成工業株式会社製：Ｗ−６）で現像して、印刷版を得た。なお、ネガフィルムは、図５に示したように、幅３００μｍの露光部分を持っているが（この露光部分がレリーフ部形成箇所である。）、この露光部分の中心に非露光部（黒色部：幅約２００μｍ）が１本設けられており、レリーフ部の先端面に、１本の線状凹部を形成しうるものである。
【００１６】
このようにして得られた印刷版は、支持体厚み１．５ｍｍでレリーフ部厚み（レリーフ部高さ）０．７５ｍｍであり、レリーフ部の幅は３００μｍであり、線状凹部が線状レリーフ部の長手方向に沿って１本形成されたものであった。そして、線状凹部の幅は２２８μｍであり、線状凹部の深さは１３６μｍであった。線状凹部の断面を三角であるとして、線状レリーフ部長さ１ｍｍ当たりの線状凹部の総体積は、計算値で１．５５×１０-2ｍｍ3であった。
【００１７】
実施例２
ネガフィルムのレリーフ部形成箇所を図６に示した態様とした他は、実施例１と同一の方法で印刷版を得た。ネガフィルムは、幅３００μｍの露光部分を持っているが、この露光部分の中心に非露光部（黒色部：幅約８０μｍ）が２本設けられており、レリーフ部の先端面に、２本の線状凹部を形成しうるものである。得られた印刷版の支持体厚み、レリーフ部厚み及びレリーフ部の幅は実施例１と同一であり、線状凹部が線状レリーフ部の長手方向に沿って２本形成されたものであった。そして、線状凹部の幅は８０μｍであり、線状凹部の深さは３２μｍであった。線状凹部の断面を三角であるとして、線状レリーフ部長さ１ｍｍ当たりの線状凹部の総体積は、計算値で２．５６×１０-3ｍｍ3であった。
【００１８】
実施例３
ネガフィルムのレリーフ部形成箇所を図７に示した態様とした他は、実施例１と同一の方法で印刷版を得た。ネガフィルムは、幅３００μｍの露光部分を持っているが、この露光部分の中心に非露光部（黒色部：幅約３０μｍ）が３本設けられており、レリーフ部の先端面に、３本の線状凹部を形成しうるものである。得られた印刷版の支持体厚み、レリーフ部厚み及びレリーフ部の幅は実施例１と同一であり、線状凹部が線状レリーフ部の長手方向に沿って３本形成されたものであった。そして、線状凹部の幅は３３μｍであり、線状凹部の深さは１５μｍであった。線状凹部の断面を三角であるとして、線状レリーフ部長さ１ｍｍ当たりの線状凹部の総体積は、計算値で７．３４×１０-4ｍｍ3であった。
【００１９】
（削除）
【００２０】
（削除）
【００２１】
以上のようにして得られた各印刷版を、印刷機（ＭＴシステム社製：ＦＣ３３Ｓ）に取り付け、シール剤（三井化学株式会社製：ストラクトボンド「ＸＮ−５Ａ」、粘度１８，８００ｍＰａ・ｓ）を用いて、厚さ約１．１ｍｍのガラス基盤にシール剤を転写した。その結果は、表１に示すとおりであった。
なお、各項目の試験方法は、以下のとおりである。
〔転写幅〕
ガラス基盤に転写されたシール剤の幅を、株式会社キーエンス製のマイクロスコープにて実測した。
〔転写高さ〕
ガラス基盤に転写されたシール剤の高さを、株式会社キーエンス製の超深度形状測定顕微鏡にて実測した。
〔転写量〕
シール剤の転写幅と転写高さとから、ガラス基盤に転写されたシール剤の量を計算した。
〔レベリング判定〕
ガラス基盤に転写されたシール剤の均一性を、株式会社キーエンス製のマイクロスコープで、目視により、以下の基準で評価した。
◎：シール剤は極めて均一に転写されていた。
○：シール剤は均一に転写されていた。
△：シール剤は概ね均一に転写されていた。
×：シール剤は不均一に転写されていた。
〔転写の鮮鋭さ〕
ガラス基盤に転写されたシール剤の端縁に、ギザギザがどの程度存在するかを、目視により、以下の基準で評価した。
◎：シール剤の端縁には殆どギザギサが存在しなかった。
○：シール剤の談縁には概ねギザギザが見られなかった。
△：シール剤の端縁に若干ギザギザが見られた。
×：シール剤の端縁にかなりのギザギザが見られた。
【００２２】
【表1 】

Figure 0004009074
【００２３】
表１の結果から明らかなように、実施例１〜３に係る印刷版を用いれば、全体に均一に、比較的多量のシール剤を転写することができ、また、転写されたシール剤の端縁も鮮鋭なものとなる。
【００２４】
【作用】
本発明に係る印刷版を用いて、液晶基盤貼り合わせ用シール剤を、ガラス基盤等に転写すれば、線状レリーフ部の先端面に特定の凹部が設けられているので、比較的多量のシール剤を転写することができる。しかも、シール剤が転写されない箇所が生じるのを防止できる。更に、転写されたシール剤の端縁が鮮鋭なものとなる。
【００２５】
【発明の効果】
従って、本発明に係る印刷版を用いれば、比較的多量のシール剤を転写できるので、所望の転写高さが得られ、液晶を封入するのに十分な間隙を得ることができる。また、シール剤が転写されない箇所が生じにくいので、シール剤が転写されたガラス基盤等を貼り合わせて、液晶表示装置を作成した場合、シール剤中に空気を包含することがなく（シール剤が転写されない箇所が存在すると、シール剤中に空気を包含することなる。）、この空気が膨張して、貼り合わせが剥離するのを防止でき、液晶表示装置からの液晶の漏れが防止しうるという効果を奏する。また、転写されたシール剤の端縁は鮮鋭であるので、シール剤の一部が配向膜を汚すということも防止しうる。
【図面の簡単な説明】
【図１】 基盤１にシール剤２が転写された状態を示した平面図である。
【図２】 本発明の一例に係る印刷版を示した模式的平面図である。
【図３】 図２の印刷版のＡ−Ａ線断面図を模式的に示したものである。
【図４】 実施例１で用いるネガフィルムを示した模式的平面図である。
【図５】 実施例２で用いるネガフィルムのレリーフ部形成箇所の一部を示した拡大模式図である。
【図６】 実施例３で用いるネガフィルムのレリーフ部形成箇所の一部を示した拡大模式図である。
【符号の説明】
１ 基盤
２ シール剤
３ 配向膜
４ 液晶を注入するための注入口
１１ 支持体
１２ 線状レリーフ部
１３ 線状凹部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printing plate used for transferring a sealant for bonding a liquid crystal substrate to the liquid crystal substrate.
[0002]
[Prior art]
Generally, a liquid crystal display device is produced as follows. That is, the alignment film 3 is provided in a fixed section of the glass substrate 1 and a predetermined surface processing is performed on the alignment film 3. Thereafter, the sealing agent 2 is provided so as to surround the alignment film 3. Then, the pair is bonded so that the sealing agents 2 are in contact with each other. Thereafter, liquid crystal is injected from the injection port 4 and sealed to obtain a liquid crystal display device.
[0003]
Conventionally, as a method for providing the sealant 2, for example, a screen printing method has been adopted. That is, by using a screen (mesh-like material such as a mesh fabric), a portion other than the portion where the sealing agent 2 is exuded is sealed, and only the sealing agent 2 is exuded, and the sealing agent 2 is provided at a predetermined portion. is there. However, this method has a risk that the screen contacts the alignment film 3 and damages the alignment film 3. In particular, if the surface-processed alignment film 3 is damaged, the liquid crystal is not fixed uniformly and the liquid crystal display is not uniform or homogeneous.
[0004]
For this reason, a dispenser coating method is also employed instead of screen printing. In the dispenser coating method, the sealant 2 is applied only to a predetermined portion using an extruder (such as a syringe) of the sealant 2. In this method, the alignment film 3 and the extruder do not come into contact with each other, and the alignment film 3 is not damaged. However, the sealant 2 has to be applied while moving the extruder to a predetermined portion, and there is a drawback that it takes time to apply the sealant 2, that is, it takes time to move. Therefore, compared to the screen printing method, the liquid crystal display device cannot be produced in a short time, and there is a grudge that it is not rational.
[0005]
[Problems to be solved by the invention]
Therefore, the present inventors considered that the sealing agent 2 may be printed and transferred by a relief printing method. The relief printing method is a method in which a printing plate composed of a relief portion and a support that supports the relief portion is used, printing ink or the like is applied to the leading end surface of the relief portion, and this is transferred to the printing surface. Therefore, portions other than the relief portion do not come into contact with the surface to be printed, and there is no fear of damaging the alignment film 3. However, when a sealing agent is applied to the front end surface of the relief portion by the relief printing method and transferred to a glass substrate, the transfer amount is small and a predetermined transfer height cannot be obtained. That is, when a predetermined transfer height cannot be obtained, when a substrate is bonded to create a liquid crystal display device, the gap between the substrates is reduced, and a desired amount of liquid crystal cannot be sealed. Further, since the transfer amount is small, there may be a portion where the sealant is not transferred. That is, if there is a portion that is not transferred, air remains in this portion, the air expands due to the ambient temperature, and the bonded portion of the obtained liquid crystal display device peels off, and the liquid crystal may leak. In addition, the transferred sealant may have jagged edges, which may prevent sharp transfer of the sealant and cause the sealant to adhere to the alignment film.
[0006]
In order to solve the above-described drawbacks, the present inventors have provided a recess on the tip surface of the relief portion, and by supplying the sealant to the recess, the transfer amount can be increased by increasing the amount of the sealant applied. We thought that the shortcoming of becoming less could be prevented. And when a specific concave portion was actually provided on the tip surface of the relief portion and an experiment was conducted, the amount of transfer could be increased, and unexpectedly, there was no place where the sealant was not transferred. Moreover, it has been found that sharp transfer of the sealant can also be realized. The present invention is based on such knowledge.
[0007]
[Means for Solving the Problems]
That is, in the present invention , a substantially quadrangular linear relief portion having a tip surface for applying a sealant and a support for supporting the linear relief portion are integrated, On the tip surface of the linear relief portion , one, two, or three linear recesses are formed in a region other than both end edges of the tip surface along the longitudinal direction of the linear relief portion. provided and not provided a recess for the both edges, the said line-like recesses, for bonding a liquid crystal base, characterized in that the sealing agent is filled at the time of application of the sealant The present invention relates to a printing plate for transferring a sealant.
[0008]
The printing plate according to the present invention includes a support 11 and a relief portion 12. The support 11 and the relief portion 12 are integrated and are generally formed of a cured photosensitive resin. A conventionally well-known thing is used as photosensitive resin, For example, the various APR resin by Asahi Kasei Kogyo Co., Ltd. can be used. The thickness of the support 11 is generally about 1 to 3 mm. Moreover, the thickness (height) of the relief part 12 is generally about 0.5 to 1.5 mm.
[0009]
The tip surface of the relief portion 12 is for applying a sealant and transferring the sealant onto the substrate 1. Therefore, the front end surface of the relief portion 12 has the same shape as the sealing agent 2 provided on the base 1. Specifically, the sealing agent 2 is linear and surrounds the alignment film 3, and has a substantially quadrangular shape. Therefore, the leading end surface of the relief portion 12 is also linear and surrounds the alignment film 3, and has a substantially quadrilateral shape. Since the front end surface of the relief portion 12 is narrow and linear, it is expressed as the linear relief portion 12 in the present invention. The width of the front end surface of the relief portion 12 is generally 200 to 400 μm. If the width of the tip surface is less than 200 μm, the width of the sealant to be transferred is about 200 μm or less, and the sealing strength may be reduced. Further, if the width of the tip surface exceeds 400 μm, the liquid crystal display device becomes larger as the width of the sealing agent becomes wider, which is not preferable. In FIG. 3, the front end surface of the relief portion 12 and the integrated portion of the support 11 have substantially the same width, but generally the integrated portion is wider.
[0010]
What is important in the present invention is that one, two, or three linear recesses 13 are provided on the front end surface of the relief portion 12 along the longitudinal direction of the linear relief portion 12 . That is. The linear concave portion 13 is provided in a region other than both end edges of the distal end surface of the linear relief portion 12. That is, as shown in FIG. 3, the linear relief portion 12 is provided at the center portion of the distal end surface. The linear recess 13 is filled with the applied sealant, and the sealant is placed on a surface other than the linear recess 13 . The number of the linear recesses 13 may be one, two, or three, but the most preferable is three. Although this reason is not certain, it is because the sealing agent 2 transferred to the substrate 1 tends to be uniform.
[0011]
The linear concave portion 13 is provided in a region other than both end edges of the front end surface of the linear relief portion 12, and no concave portion is provided in a region other than the both end edges . When the concave portion is provided, the sealant is filled in this portion, and a jagged edge is generated at the edge of the transferred sealant, so that the sealant cannot be transferred sharply.
[0012]
Although the depth of the linear recessed part 13 is arbitrary, about 5-50 micrometers is preferable. When the depth is less than 5 μm, the filling amount of the sealing agent is decreased, and the transfer amount may be decreased. If the depth exceeds 50 μm, it is difficult to provide a plurality of recesses. For example, in the case of a single linear recess 13, a depth exceeding 50 μm can be obtained, but in this case, the uniformity of the transferred sealant tends to decrease. The total volume per 1mm length of the linear relief of the linear recesses 13 formed in the end surface of the relief portion 12, 7.00 × 10 -4 mm 3 ~3.00 × 10 -2 mm 3 It is preferable that it is about.
[0013]
Using the printing plate described above, a sealing agent is applied to the printing plate surface. Since the printing plate surface is the leading end surface of the relief portion 12, a sealing agent is applied to this surface. Then, since the linear recess 13 is formed on the tip surface, the sealing agent is also filled in the linear recess 13 . Thereafter, if the printing plate is brought into contact with the substrate, the applied sealant can be printed (transferred) onto the substrate. In addition, as long as it is a conventionally well-known sealing agent, what can be used can be used and it is typically preferable to use an epoxy-type resin. The viscosity of the sealing agent is not particularly limited, but preferably 20,000 to 40,000 centipoise.
[0014]
【Example】
EXAMPLES Hereinafter, although this invention is demonstrated based on an Example, this invention is not limited to an Example. The present invention provides a liquid crystal substrate when 1 to 3 linear recesses are provided in a region other than both end edges of the front end surface along the longitudinal direction of the linear relief portion on the front end surface of the linear relief portion of the printing plate. It should be construed that it is based on the knowledge that a relatively large amount and a uniform amount of the sealant for bonding can be transferred to the liquid crystal substrate, and that the sealant can be sharply transferred.
[0015]
Example 1
After pouring a liquid photosensitive resin (Asahi Kasei Kogyo Co., Ltd .: APR resin K-11) into the frame, the entire surface is exposed for 70 seconds from the side to be the support, and the liquid photosensitive resin is cured to provide a support. Got. Next, it exposed for 65 seconds from the side used as a relief part through a negative film, and obtained the relief part. Then, it developed with alkaline surfactant aqueous solution (Asahi Kasei Kogyo KK-made: W-6), and obtained the printing plate. As shown in FIG. 5, the negative film has an exposed portion having a width of 300 μm (this exposed portion is a relief forming portion), but the non-exposed portion (black portion) is formed at the center of this exposed portion. : About 200 μm in width), and one linear concave portion can be formed on the front end surface of the relief portion.
[0016]
The printing plate thus obtained has a support thickness of 1.5 mm, a relief part thickness (relief part height) of 0.75 mm, a relief part width of 300 μm, and a linear recess having a linear relief part. One was formed along the longitudinal direction. And the width | variety of the linear recessed part was 228 micrometers, and the depth of the linear recessed part was 136 micrometers. Assuming that the cross-section of the linear concave portion is triangular, the total volume of the linear concave portion per 1 mm of the linear relief portion length was 1.55 × 10 −2 mm 3 as a calculated value.
[0017]
Example 2
A printing plate was obtained in the same manner as in Example 1 except that the relief film forming portion of the negative film was changed to the embodiment shown in FIG. The negative film has an exposed portion having a width of 300 μm, and two non-exposed portions (black portion: width of about 80 μm) are provided in the center of the exposed portion, and two pieces are provided on the leading end surface of the relief portion. A linear recess can be formed. The thickness of the support, the thickness of the relief portion, and the width of the relief portion of the obtained printing plate were the same as in Example 1, and two linear concave portions were formed along the longitudinal direction of the linear relief portion. . And the width | variety of the linear recessed part was 80 micrometers, and the depth of the linear recessed part was 32 micrometers. Assuming that the cross section of the linear concave portion is triangular, the total volume of the linear concave portion per 1 mm of the linear relief portion length was calculated to be 2.56 × 10 −3 mm 3 .
[0018]
Example 3
A printing plate was obtained in the same manner as in Example 1 except that the relief film forming portion of the negative film was changed to the embodiment shown in FIG. The negative film has an exposed portion with a width of 300 μm, and three non-exposed portions (black portion: width of about 30 μm) are provided at the center of the exposed portion, and three pieces are provided on the front end surface of the relief portion. A linear recess can be formed. The thickness of the support, the thickness of the relief portion, and the width of the relief portion of the obtained printing plate were the same as in Example 1, and three linear concave portions were formed along the longitudinal direction of the linear relief portion. . And the width | variety of the linear recessed part was 33 micrometers, and the depth of the linear recessed part was 15 micrometers. Assuming that the cross section of the linear concave portion is triangular, the total volume of the linear concave portion per 1 mm of the linear relief portion length was calculated to be 7.34 × 10 −4 mm 3 .
[0019]
(Delete)
[0020]
(Delete)
[0021]
Each printing plate obtained as described above is attached to a printing press (manufactured by MT System: FC33S), and a sealing agent (manufactured by Mitsui Chemicals, Inc .: struct bond “XN-5A”, viscosity 18,800 mPa · s). Was used to transfer the sealant to a glass substrate having a thickness of about 1.1 mm. The results were as shown in Table 1.
The test method for each item is as follows.
(Transfer width)
The width of the sealant transferred to the glass substrate was measured with a microscope manufactured by Keyence Corporation.
[Transfer height]
The height of the sealant transferred to the glass substrate was measured with an ultra-deep shape measuring microscope manufactured by Keyence Corporation.
[Transfer amount]
The amount of sealant transferred to the glass substrate was calculated from the transfer width and transfer height of the sealant.
[Leveling judgment]
The uniformity of the sealant transferred to the glass substrate was visually evaluated with the following criteria using a microscope manufactured by Keyence Corporation.
A: The sealant was transferred extremely uniformly.
○: The sealing agent was uniformly transferred.
Δ: The sealant was almost uniformly transferred.
X: The sealing agent was transferred unevenly.
[Sharpness of transfer]
The degree of jaggedness present on the edge of the sealant transferred to the glass substrate was evaluated visually according to the following criteria.
A: Almost no jaggedness was present at the edge of the sealant.
○: Jagged edges were not observed in the sealant.
Δ: Some jagged edges were observed at the edge of the sealant.
X: A considerable jaggedness was observed at the edge of the sealant.
[0022]
【table 1 】
Figure 0004009074
[0023]
As is apparent from the results in Table 1, when the printing plates according to Examples 1 to 3 are used, a relatively large amount of the sealing agent can be transferred uniformly over the whole, and the end of the transferred sealing agent can be transferred. The edges are also sharp.
[0024]
[Action]
If the sealing agent for laminating a liquid crystal substrate is transferred to a glass substrate or the like using the printing plate according to the present invention, a specific recess is provided on the tip surface of the linear relief portion, so a relatively large amount of seal The agent can be transferred. Moreover, it is possible to prevent the occurrence of a portion where the sealant is not transferred. Furthermore, the edge of the transferred sealant becomes sharp.
[0025]
【The invention's effect】
Therefore, if a printing plate according to the present invention is used, a relatively large amount of sealant can be transferred, so that a desired transfer height can be obtained and a gap sufficient to enclose liquid crystal can be obtained. In addition, since the portion where the sealant is not transferred is unlikely to occur, when a liquid crystal display device is produced by bonding a glass substrate or the like to which the sealant is transferred, the sealant does not include air (the sealant is If there is a portion that is not transferred, air is included in the sealant.) This air can be expanded to prevent the bonding from being peeled off, and liquid crystal leakage from the liquid crystal display device can be prevented. There is an effect. Further, since the edge of the transferred sealant is sharp, it can be prevented that a part of the sealant contaminates the alignment film.
[Brief description of the drawings]
FIG. 1 is a plan view showing a state in which a sealant 2 is transferred to a substrate 1. FIG.
FIG. 2 is a schematic plan view showing a printing plate according to an example of the present invention.
3 is a schematic cross-sectional view taken along line AA of the printing plate of FIG.
4 is a schematic plan view showing a negative film used in Example 1. FIG.
FIG. 5 is an enlarged schematic view showing a part of a relief portion forming portion of a negative film used in Example 2;
FIG. 6 is an enlarged schematic view showing a part of a relief forming portion of a negative film used in Example 3.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 2 Sealing agent 3 Alignment film 4 Injection port for injecting liquid crystal 11 Support body 12 Linear relief part 13 Linear recessed part

Claims (5)

シール剤を塗布するための先端面を具備した、略四辺形の線状レリーフ部と、該線状レリーフ部を支持するための支持体とが一体化されてなり、該線状レリーフ部の該先端面には、該線状レリーフ部の長手方向に沿って、該先端面の両端縁以外の領域に１本、２本及び３本のいずれか一の線状凹部が設けられており、かつ、該両端縁には凹部が設けられておらず、該線状凹部には、該シール剤の塗布時に該シール剤が充填されることを特徴とする液晶基盤貼り合わせ用シール剤を転写するための印刷版。A substantially quadrangular linear relief portion having a tip surface for applying a sealant and a support for supporting the linear relief portion are integrated, and the linear relief portion The tip surface is provided with one, two, or three linear recesses in a region other than both end edges of the tip surface along the longitudinal direction of the linear relief portion ; and not provided a recess for the both edges, the said linear recess, for transferring a sealant for bonding the liquid crystal base, characterized in that the sealing agent is filled at the time of application of the sealant Printing version. 線状レリーフ部の幅は２００〜４００μｍである請求項１記載の液晶基盤貼り合わせ用シール剤を転写するための印刷版。  2. A printing plate for transferring a liquid crystal substrate laminating sealant according to claim 1, wherein the width of the linear relief portion is 200 to 400 [mu] m. 線状レリーフ部の先端面には、３本の線状凹部が設けられている請求項１又は２記載の液晶基盤貼り合わせ用シール剤を転写するための印刷版。  The printing plate for transferring the sealing agent for laminating a liquid crystal substrate according to claim 1, wherein three linear concave portions are provided on a front end surface of the linear relief portion. 線状レリーフ部及び支持体は、硬化した感光性樹脂で形成されている請求項１乃至３のいずれか一項に記載の液晶基盤貼り合わせ用シール剤を転写するための印刷版。The printing plate for transferring the liquid crystal substrate bonding sealant according to any one of claims 1 to 3 , wherein the linear relief portion and the support are formed of a cured photosensitive resin. 請求項１乃至４のいずれか一項に記載の印刷版を用い、該印刷版の線状レリーフ部の先端面にシール剤を塗布した後、該シール剤を液晶基盤に転写することを特徴とする液晶基盤貼り合わせ用シール剤の転写方法。A printing plate according to any one of claims 1 to 4 , wherein a sealing agent is applied to a tip surface of a linear relief portion of the printing plate, and then the sealing agent is transferred to a liquid crystal substrate. A method for transferring a sealing agent for laminating liquid crystal substrates.
JP2001213485A 2001-07-13 2001-07-13 Printing plate for transferring sealant for bonding liquid crystal substrates Expired - Fee Related JP4009074B2 (en)

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JP2001213485A JP4009074B2 (en) 2001-07-13 2001-07-13 Printing plate for transferring sealant for bonding liquid crystal substrates
TW91115520A TW574576B (en) 2001-07-13 2002-07-12 Printing plate for transferring sealing agent for adhering liquid crystal base
KR1020020040645A KR100880345B1 (en) 2001-07-13 2002-07-12 A printing plate for transcribing the sealing agent on the liquid crystal substrate
CNB021406944A CN1281411C (en) 2001-07-13 2002-07-12 Printing plate for transferring sealing agent for adhering liquid crystal base
HK03106068A HK1053626A1 (en) 2001-07-13 2003-08-25 Printing plate for transferring sealing agent for liquid crystal panel alignment and transferring method therefor

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