JP3738312B2 - Manufacturing method of liquid crystal display element - Google Patents

Manufacturing method of liquid crystal display element Download PDF

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Publication number
JP3738312B2
JP3738312B2 JP15187599A JP15187599A JP3738312B2 JP 3738312 B2 JP3738312 B2 JP 3738312B2 JP 15187599 A JP15187599 A JP 15187599A JP 15187599 A JP15187599 A JP 15187599A JP 3738312 B2 JP3738312 B2 JP 3738312B2
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adhesive
film
film substrate
substrate
liquid crystal
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JP2000338454A (en
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鈴木　　剛
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Casio Computer Co Ltd
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Casio Computer Co Ltd
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【０００１】
【発明の属する技術分野】
この発明は、フィルム基板を用いた液晶表示素子の製造方法に関する。
【０００２】
【従来の技術】
従来、液晶表示素子には、一対の透明基板として、フレキシブルな一対のフィルム基板を用いた構造のものが知られている。
図３はその一例を示した図である。この液晶表示素子は、単純マトリクス型のもので、上下一対のフィルム基板１、２を備えている。これらフィルム基板１、２は、ポリエーテルサルホン（ＰＥＳ）やポリカーボネイト（ＰＣ）などの透明な合成樹脂からなっている。この場合、下側のフィルム基板２の対向面（同図では上面）には、ＩＴＯなどからなる帯状の透明電極３が行方向（同図では左右方向）に配列形成されており、これら透明電極３の表面は配向膜４で覆われている。また、上側のフィルム基板１の対向面（同図では下面）には、ＩＴＯなどからなる帯状の透明電極５が下側のフィルム基板２の透明電極３と直交する方向に配列形成されており、これら透明電極５の表面は配向膜６で覆われている。そして、上側のフィルム基板１と下側のフィルム基板２とは、各配向膜６、４を対向させた状態で上下に配置され、これらの間には液晶７が封入されている。
【０００３】
このような液晶表示素子を製造する場合には、図４に示すように、上下一対のフィルム基板１、２のうち、例えば、上側のフィルム基板１をガラスやセラミックまたは金属などのキャリア基板１０にエポキシ系樹脂の接着剤１１により接着し、この状態でフィルム基板１の表面に透明電極５をフォトリソグラフィ法により形成した上、配向膜６を印刷などにより形成し、この配向膜６の表面にラビング処理を施している。なお、下側のフィルム基板２も、上記と同様に、透明電極３および配向膜４を形成する。そして、フィルム基板１、２をキャリア基板１０から剥離し、２枚のフィルム基板１、２の各配向膜６、４を対向させた状態で、フィルム基板１、２を所定の間隔で貼り合わせ、これらの間に液晶７を封入している。
【０００４】
【発明が解決しようとする課題】
このような液晶表示素子の製造方法では、キャリア基板１０にフィルム基板１、２（以下、上側のフィルム基板１のみについて説明する。）を接着するための接着剤１１に、耐熱性および耐薬品性が要求されるほか、接着性と剥離性の相反する性能も要求される。
しかしながら、このようなエポキシ系樹脂の接着剤１１では、これらの条件をすべて満足することは困難であり、特に耐熱性および剥離性において問題がある。例えば、配向膜６を形成するときなどの熱により、図５に示すように、フィルム基板１が接着剤１１から剥がれてしまい、その後のラビング処理が困難になるという問題がある。
【０００５】
この発明の課題は、接着性および剥離性に優れ、フィルム基板を確実にキャリア基板に接着させた状態で、フィルム基板に透明電極や配向膜などを良好に形成できるようにすることである。
【０００６】
【課題を解決するための手段】
この発明は、液晶を封入する一対のフィルム基板のうち、少なくとも一方のフィルム基板を接着剤によりキャリア基板に接着し、この状態で前記フィルム基板に透明電極および配向膜を形成する液晶表示素子の製造方法において、前記接着剤は、前記フィルム基板に所定の接着力で接着する第１接着層と、前記キャリア基板に所定の接着力で接着する第２接着層との２層構造で、前記第１接着層よりも前記第２接着層の接着力が大きいことを特徴とする。
この発明によれば、第１接着層がフィルム基板に所定の接着力で接着し、第２接着層がキャリア基板に所定の接着力で接着するので、これら第１、第２接着層からなる接着剤により、フィルム基板をキャリア基板に確実に接着させることができ、このため、例えば配向膜を形成するときなどの熱によりフィルム基板が接着剤から剥がれることがなく、キャリア基板にフィルム基板を確実に接着した状態で、良好に透明電極や配向膜などを形成することができ、また第１接着層よりも第２接着層の接着力が大きいことにより、フィルム基板を接着剤から剥離することができる。
【０００７】
この場合、請求項２に記載のごとく、前記接着剤は、前記第１接着層と前記第２接着層との間にセパレータ層が設けられた３層構造であることにより、第１接着層と第２接着層との成分が混合し合うのを防ぐことができ、これにより第１、第２接着層の各接着性能を確保することができるので、請求項１記載の発明よりも、接着性および剥離性に優れたものを得ることができ、より一層、良好に透明電極や配向膜などを形成することができる。
【０００８】
【発明の実施の形態】
［第１実施形態］
以下、図１を参照して、この発明の液晶表示素子の製造方法の第１実施形態について説明する。なお、図３および図４に示された従来例と同一部分には同一符号を付し、その説明は省略する。
この液晶表示素子の製造方法は、フィルム基板１を２層構造の接着剤１３によりキャリア基板１０に接着し、このフィルム基板１に透明電極５および配向膜６を形成する方法であり、これ以外は従来例と同じである。
すなわち、フィルム基板１をキャリア基板１０に接着する接着剤１３は、第１接着層１４と第２接着層１５との２層構造である。第１接着層１４は、フィルム基板１になじみやすく、かつ剥離性を有するアクリル系樹脂からなり、フィルム基板１に所定の接着力で接着するものである。第２接着層１５は、エポキシ系樹脂からなり、キャリア基板１０に強固に接着するもので、その接着力が第１接着層１４よりも大きく形成されている。
【０００９】
このような接着剤１３によりフィルム基板１をキャリア基板１０に接着して、フィルム基板１に透明電極５および配向膜６を形成する場合には、アクリル系樹脂からなる第１接着層１４がフィルム基板１に所定の接着力で良好に接着し、エポキシ系樹脂からなる第２接着層１５がキャリア基板１０に強固に接着するので、これら第１、第２接着層１４、１５からなる接着剤１３により、フィルム基板１をキャリア基板１０に確実に接着させることができる。このため、フィルム基板１に透明電極５を形成するフォトリソグラフィ工程、およびフィルム基板１に配向膜６を形成してラビング処理を施す配向膜形成工程において、例えば配向膜６を形成するときなどの熱によりフィルム基板１が接着剤１３から剥がれることがなく、キャリア基板１０にフィルム基板１を確実に接着させた状態で、良好に透明電極５および配向膜６を形成してラビング処理を施すことができる。また、フィルム基板１をキャリア基板１０から剥離するときには、第１接着層１４よりも第２接着層１５の接着力が大きく、かつ第１接着層１４がフィルム基板１に体して剥離性を有していることにより、フィルム基板１を接着剤１３の第１接着層１４から良好に剥離することができる。
【００１０】
［第２実施形態］
次に、図２を参照して、この発明の液晶表示素子の製造方法の第２実施形態について説明する。なお、図１に示された第１実施形態と同一部分には同一符号を付し、その説明は省略する。
この液晶表示素子の製造方法は、フィルム基板１を３層構造の接着剤２０によりキャリア基板１０に接着し、このフィルム基板１に透明電極５および配向膜６を形成する方法であり、これ以外は第１実施形態と同じである。
すなわち、この接着剤２０は、フィルム基板１に所定の接着力で接着するアクリル系樹脂からなる第１接着層１４と、キャリア基板１０に強固に接着するエポキシ系樹脂からなる第２接着層１５との間に、セパレータ層２１を設けた３層構造に形成されている。この場合、セパレータ層２１は、ポリエチレンテレフタレート（ＰＥＴ）などの合成樹脂からなり、その厚みが５０μｍ以下で、好ましくは２５μｍ程度に形成されている。
【００１１】
このような接着剤２０によりフィルム基板１をキャリア基板１０に接着して、フィルム基板１に透明電極５および配向膜６を形成する場合には、アクリル系樹脂からなる第１接着層１４がフィルム基板１に所定の接着力で接着し、エポキシ系樹脂からなる第２接着層１５がキャリア基板１０に強固に接着するので、第１実施形態と同様、接着剤２０によりフィルム基板１をキャリア基板１０に確実に接着させることができ、この状態で良好に透明電極５および配向膜６を形成してラビング処理を施すことができる。特に、接着剤２０は、第１、第２接着層１４、１５の間にセパレータ層２１を設けた構造であるから、このセパレータ層２１により第１接着層１４と第２接着層１５との成分が混合し合うのを防ぐことができ、これにより第１、第２接着層１４、１５の各接着性能を確保することができるので、第１実施形態の場合よりも、接着性および剥離性に優れたものを得ることができる。また、セパレータ層２１は、その厚みが５０μｍ以下で、好ましくは２５μｍ程度であることにより、フィルム基板１とキャリア基板１０との温度差による応力歪を緩和することができ、熱によるフィルム基板１の剥がれや浮きを確実に防止することができる。このため、この接着剤２０では、極めて耐熱性が良く、かつ耐久性にも優れ、キャリア基板１０にフィルム基板１を接着した状態で、第１実施形態の場合よりも、より一層、良好に透明電極５および配向膜６を形成してラビング処理を施すことができる。
【００１２】
なお、上記第１、第２実施形態では、液晶表示素子の一対のフィルム基板１、２のうち、上側のフィルム基板１について述べたが、これに限らず、下側のフィルム基板２についても、まったく同様に適用することができる。
また、上記第１、第２実施形態では、液晶表示素子として、白黒表示の単純マトリクス型の場合について述べたが、これに限らず、例えば、一方のフィルム基板に薄膜トランジスタなどの駆動素子を搭載した透明な画素電極を形成し、他方のフィルム基板に透明な共通電極を形成したアクティブ型の液晶表示素子にも適用することができ、また一方のフィルム基板にカラーフィルタを設けたカラー表示の液晶表示素子にも適用することができる。
【００１３】
【発明の効果】
以上説明したように、この発明によれば、フィルム基板を接着剤によりキャリア基板に接着し、この状態でフィルム基板に透明電極および配向膜を形成する液晶表示素子の製造方法において、接着剤が、フィルム基板に所定の接着力で接着する第１接着層と、キャリア基板に所定の接着力で接着する第２接着層との２層構造であるから、これら第１、第２接着層からなる接着剤により、フィルム基板をキャリア基板に確実に接着させることができ、このため、例えば配向膜を形成するときなどの熱によりフィルム基板が接着剤から剥がれることがなく、キャリア基板にフィルム基板を接着した状態で、良好に透明電極や配向膜などを形成することができ、また第１接着層よりも第２接着層の接着力が大きいことにより、フィルム基板を接着剤から剥離することができる。
この場合、第１接着層と第２接着層との間にセパレータ層を設けられた３層構造であれば、第１接着層と第２接着層との成分が混合し合うのを防ぐことができ、これにより第１、第２接着層の各接着性能を確保することができるので、接着性および剥離性に優れたものを得ることができ、より一層、良好に透明電極や配向膜などを形成することができる。
【図面の簡単な説明】
【図１】この発明の液晶表示素子の製造方法の第１実施形態において、２層構造の接着剤によりフィルム基板をキャリア基板に接着した状態を示した要部の拡大断面図。
【図２】この発明の液晶表示素子の製造方法の第２実施形態において、３層構造の接着剤によりフィルム基板をキャリア基板に接着した状態を示した要部の拡大断面図。
【図３】液晶表示素子の断面図。
【図４】従来の接着剤によりフィルム基板をキャリア基板に接着した状態を示した要部の拡大断面図。
【図５】図４の状態で熱によりフィルム基板が接着剤から剥離する状態を示した要部の拡大断面図。
【符号の説明】
１、２ フィルム基板
３、５ 透明電極
４、６ 配向膜
７ 液晶
１０ キャリア基板
１３ ２層構造の接着剤
１４ 第１接着層
１５ 第２接着層
２０ ３層構造の接着剤
２１ セパレータ層[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a liquid crystal display element using a film substrate.
[0002]
[Prior art]
Conventionally, a liquid crystal display element having a structure using a flexible pair of film substrates as a pair of transparent substrates is known.
FIG. 3 is a diagram showing an example thereof. This liquid crystal display element is of a simple matrix type and includes a pair of upper and lower film substrates 1 and 2. These film substrates 1 and 2 are made of a transparent synthetic resin such as polyethersulfone (PES) and polycarbonate (PC). In this case, strip-like transparent electrodes 3 made of ITO or the like are arranged in the row direction (left-right direction in the figure) on the opposing surface (upper surface in the figure) of the lower film substrate 2. The surface 3 is covered with an alignment film 4. Further, on the opposing surface (the lower surface in the figure) of the upper film substrate 1, a strip-shaped transparent electrode 5 made of ITO or the like is arranged in a direction orthogonal to the transparent electrode 3 of the lower film substrate 2, The surfaces of these transparent electrodes 5 are covered with an alignment film 6. The upper film substrate 1 and the lower film substrate 2 are arranged one above the other with the alignment films 6 and 4 facing each other, and a liquid crystal 7 is sealed between them.
[0003]
When manufacturing such a liquid crystal display element, as shown in FIG. 4, of the pair of upper and lower film substrates 1 and 2, for example, the upper film substrate 1 is placed on a carrier substrate 10 such as glass, ceramic, or metal. In this state, the transparent electrode 5 is formed on the surface of the film substrate 1 by a photolithography method, and the alignment film 6 is formed by printing or the like, and the surface of the alignment film 6 is rubbed. We are processing. The lower film substrate 2 also forms the transparent electrode 3 and the alignment film 4 in the same manner as described above. Then, the film substrates 1 and 2 are peeled off from the carrier substrate 10 and the film substrates 1 and 2 are bonded at a predetermined interval in a state where the alignment films 6 and 4 of the two film substrates 1 and 2 are opposed to each other. Liquid crystal 7 is sealed between them.
[0004]
[Problems to be solved by the invention]
In such a method for manufacturing a liquid crystal display element, heat resistance and chemical resistance are applied to the adhesive 11 for bonding the film substrates 1 and 2 (hereinafter, only the upper film substrate 1 will be described) to the carrier substrate 10. In addition to the above, it is also required to have the performance of conflicting adhesiveness and peelability.
However, it is difficult for such an epoxy resin adhesive 11 to satisfy all of these conditions, and in particular, there are problems in heat resistance and peelability. For example, there is a problem that the film substrate 1 is peeled off from the adhesive 11 due to heat such as when the alignment film 6 is formed, and the subsequent rubbing process becomes difficult.
[0005]
An object of the present invention is to make it possible to satisfactorily form a transparent electrode, an alignment film, and the like on a film substrate in a state in which the film substrate is securely bonded to a carrier substrate with excellent adhesion and peelability.
[0006]
[Means for Solving the Problems]
The present invention provides a liquid crystal display element in which at least one film substrate is bonded to a carrier substrate with an adhesive among a pair of film substrates enclosing a liquid crystal, and a transparent electrode and an alignment film are formed on the film substrate in this state. In the method, the adhesive has a two-layer structure of a first adhesive layer that adheres to the film substrate with a predetermined adhesive force and a second adhesive layer that adheres to the carrier substrate with a predetermined adhesive force, and the first adhesive layer. The adhesive force of the second adhesive layer is larger than that of the adhesive layer.
According to the present invention, the first adhesive layer adheres to the film substrate with a predetermined adhesive force, and the second adhesive layer adheres to the carrier substrate with the predetermined adhesive force. Therefore, the adhesive composed of the first and second adhesive layers. The film substrate can be securely bonded to the carrier substrate by the agent, and for this reason, for example, when the alignment film is formed, the film substrate is not peeled off from the adhesive, and the film substrate is securely attached to the carrier substrate. A transparent electrode, an alignment film, and the like can be satisfactorily formed in the bonded state, and the film substrate can be peeled from the adhesive because the adhesive force of the second adhesive layer is larger than that of the first adhesive layer. .
[0007]
In this case, as described in claim 2, the adhesive has a three-layer structure in which a separator layer is provided between the first adhesive layer and the second adhesive layer. Since it is possible to prevent the components of the second adhesive layer from mixing with each other, and thereby to ensure the adhesive performance of the first and second adhesive layers, it is more adhesive than the invention of claim 1. In addition, a material excellent in peelability can be obtained, and a transparent electrode, an alignment film, and the like can be formed more satisfactorily.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
Hereinafter, with reference to FIG. 1, 1st Embodiment of the manufacturing method of the liquid crystal display element of this invention is described. The same parts as those in the conventional example shown in FIGS. 3 and 4 are denoted by the same reference numerals, and the description thereof is omitted.
This method of manufacturing a liquid crystal display element is a method in which a film substrate 1 is bonded to a carrier substrate 10 with an adhesive 13 having a two-layer structure, and a transparent electrode 5 and an alignment film 6 are formed on the film substrate 1. This is the same as the conventional example.
That is, the adhesive 13 that bonds the film substrate 1 to the carrier substrate 10 has a two-layer structure of the first adhesive layer 14 and the second adhesive layer 15. The first adhesive layer 14 is made of an acrylic resin that is easily compatible with the film substrate 1 and has releasability, and adheres to the film substrate 1 with a predetermined adhesive force. The second adhesive layer 15 is made of an epoxy-based resin, and adheres firmly to the carrier substrate 10, and has an adhesive force greater than that of the first adhesive layer 14.
[0009]
When the film substrate 1 is bonded to the carrier substrate 10 with the adhesive 13 and the transparent electrode 5 and the alignment film 6 are formed on the film substrate 1, the first adhesive layer 14 made of an acrylic resin is used as the film substrate. Since the second adhesive layer 15 made of epoxy resin is firmly bonded to the carrier substrate 10 with a predetermined adhesive force, the adhesive 13 made of the first and second adhesive layers 14 and 15 is used. The film substrate 1 can be securely bonded to the carrier substrate 10. For this reason, in the photolithography process for forming the transparent electrode 5 on the film substrate 1 and the alignment film forming process for forming the alignment film 6 on the film substrate 1 and performing the rubbing process, for example, when the alignment film 6 is formed, Thus, the transparent substrate 5 and the alignment film 6 can be satisfactorily formed and rubbed in a state where the film substrate 1 is not peeled off from the adhesive 13 and the film substrate 1 is securely bonded to the carrier substrate 10. . Further, when the film substrate 1 is peeled from the carrier substrate 10, the adhesive force of the second adhesive layer 15 is greater than that of the first adhesive layer 14, and the first adhesive layer 14 is formed on the film substrate 1 and has peelability. By doing so, the film substrate 1 can be favorably peeled from the first adhesive layer 14 of the adhesive 13.
[0010]
[Second Embodiment]
Next, a second embodiment of the method for manufacturing a liquid crystal display element of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same part as 1st Embodiment shown by FIG. 1, and the description is abbreviate | omitted.
This method for manufacturing a liquid crystal display element is a method in which a film substrate 1 is adhered to a carrier substrate 10 with an adhesive 20 having a three-layer structure, and a transparent electrode 5 and an alignment film 6 are formed on the film substrate 1. The same as in the first embodiment.
That is, the adhesive 20 includes a first adhesive layer 14 made of an acrylic resin that adheres to the film substrate 1 with a predetermined adhesive force, and a second adhesive layer 15 made of an epoxy resin that adheres firmly to the carrier substrate 10. A three-layer structure provided with a separator layer 21 therebetween. In this case, the separator layer 21 is made of a synthetic resin such as polyethylene terephthalate (PET) and has a thickness of 50 μm or less, preferably about 25 μm.
[0011]
When the film substrate 1 is bonded to the carrier substrate 10 with the adhesive 20 and the transparent electrode 5 and the alignment film 6 are formed on the film substrate 1, the first adhesive layer 14 made of an acrylic resin is used as the film substrate. Since the second adhesive layer 15 made of an epoxy resin adheres firmly to the carrier substrate 10, the film substrate 1 is attached to the carrier substrate 10 by the adhesive 20 as in the first embodiment. In this state, the transparent electrode 5 and the alignment film 6 can be well formed and rubbed. In particular, since the adhesive 20 has a structure in which a separator layer 21 is provided between the first and second adhesive layers 14 and 15, components of the first adhesive layer 14 and the second adhesive layer 15 are formed by the separator layer 21. Can be prevented, thereby ensuring the adhesion performance of the first and second adhesive layers 14 and 15, so that the adhesiveness and peelability can be improved as compared with the case of the first embodiment. An excellent product can be obtained. Further, the separator layer 21 has a thickness of 50 μm or less, preferably about 25 μm, so that stress strain due to a temperature difference between the film substrate 1 and the carrier substrate 10 can be alleviated, and the film substrate 1 is heated by heat. Peeling and lifting can be reliably prevented. For this reason, the adhesive 20 has extremely good heat resistance and excellent durability, and is more transparent than the case of the first embodiment when the film substrate 1 is bonded to the carrier substrate 10. The electrode 5 and the alignment film 6 can be formed and subjected to rubbing treatment.
[0012]
In the first and second embodiments, the upper film substrate 1 of the pair of film substrates 1 and 2 of the liquid crystal display element has been described. However, the present invention is not limited thereto, and the lower film substrate 2 is also used. It can be applied in exactly the same way.
In the first and second embodiments, the case of a simple matrix type for monochrome display has been described as the liquid crystal display element. However, the present invention is not limited to this, and for example, a driving element such as a thin film transistor is mounted on one film substrate. It can be applied to an active liquid crystal display element in which a transparent pixel electrode is formed and a transparent common electrode is formed on the other film substrate, and a color display liquid crystal display in which a color filter is provided on one film substrate It can also be applied to elements.
[0013]
【The invention's effect】
As described above, according to the present invention, in the method of manufacturing a liquid crystal display element in which a film substrate is bonded to a carrier substrate with an adhesive, and a transparent electrode and an alignment film are formed on the film substrate in this state, the adhesive is: Since it has a two-layer structure of a first adhesive layer that adheres to the film substrate with a predetermined adhesive force and a second adhesive layer that adheres to the carrier substrate with a predetermined adhesive force, the adhesive composed of these first and second adhesive layers The film substrate can be securely bonded to the carrier substrate by the agent, and for this reason, the film substrate is not peeled off from the adhesive by heat, for example, when forming an alignment film, and the film substrate is bonded to the carrier substrate. In this state, a transparent electrode, an alignment film, etc. can be formed satisfactorily, and the adhesive force of the second adhesive layer is larger than that of the first adhesive layer. It is possible to al peeling.
In this case, the three-layer structure in which the separator layer is provided between the first adhesive layer and the second adhesive layer can prevent the components of the first adhesive layer and the second adhesive layer from mixing with each other. It is possible to secure each adhesive performance of the first and second adhesive layers, thereby obtaining a material having excellent adhesiveness and releasability. Can be formed.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view of a main part showing a state in which a film substrate is bonded to a carrier substrate with an adhesive having a two-layer structure in the first embodiment of the method for manufacturing a liquid crystal display element of the present invention.
FIG. 2 is an enlarged cross-sectional view of an essential part showing a state in which a film substrate is bonded to a carrier substrate with an adhesive having a three-layer structure in a second embodiment of the method for manufacturing a liquid crystal display element of the present invention.
FIG. 3 is a cross-sectional view of a liquid crystal display element.
FIG. 4 is an enlarged cross-sectional view of a main part showing a state where a film substrate is bonded to a carrier substrate with a conventional adhesive.
5 is an enlarged cross-sectional view of the main part showing a state where the film substrate is peeled off from the adhesive by heat in the state of FIG. 4;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 2 Film substrate 3, 5 Transparent electrode 4, 6 Alignment film 7 Liquid crystal 10 Carrier substrate 13 Two-layered adhesive 14 First adhesive layer 15 Second adhesive layer 20 Three-layered adhesive 21 Separator layer

Claims (2)

液晶を封入する一対のフィルム基板のうち、少なくとも一方のフィルム基板を接着剤によりキャリア基板に接着し、この状態で前記フィルム基板に透明電極および配向膜を形成する液晶表示素子の製造方法において、
前記接着剤は、前記フィルム基板に所定の接着力で接着する第１接着層と、前記キャリア基板に所定の接着力で接着する第２接着層との２層構造で、前記第１接着層よりも前記第２接着層の接着力が大きいことを特徴とする液晶表示素子の製造方法。In the method of manufacturing a liquid crystal display element, of the pair of film substrates enclosing the liquid crystal, at least one film substrate is adhered to the carrier substrate with an adhesive, and in this state, a transparent electrode and an alignment film are formed on the film substrate.
The adhesive has a two-layer structure of a first adhesive layer that adheres to the film substrate with a predetermined adhesive force and a second adhesive layer that adheres to the carrier substrate with a predetermined adhesive force. And a method of manufacturing a liquid crystal display element, wherein the adhesive force of the second adhesive layer is large. 前記接着剤は、前記第１接着層と前記第２接着層との間にセパレータ層が設けられた３層構造であることを特徴とする請求項１記載の液晶表示素子の製造方法。2. The method for manufacturing a liquid crystal display element according to claim 1, wherein the adhesive has a three-layer structure in which a separator layer is provided between the first adhesive layer and the second adhesive layer.
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