JP2000235182A - Reflective liquid crystal display device - Google Patents
Reflective liquid crystal display deviceInfo
- Publication number
- JP2000235182A JP2000235182A JP11036547A JP3654799A JP2000235182A JP 2000235182 A JP2000235182 A JP 2000235182A JP 11036547 A JP11036547 A JP 11036547A JP 3654799 A JP3654799 A JP 3654799A JP 2000235182 A JP2000235182 A JP 2000235182A
- Authority
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- Japan
- Prior art keywords
- film
- liquid crystal
- display device
- crystal display
- substrate
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、反射型液晶表示装
置に関し、特に、前記有機膜と基板との剥離を防ぐこと
ができる信頼性に優れた反射型液晶表示装置およびその
製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflective liquid crystal display device, and more particularly to a highly reliable reflective liquid crystal display device capable of preventing separation of the organic film from a substrate and a method of manufacturing the same. is there.
【０００２】[0002]
【従来の技術】近年、ハンディタイプのコンピュータな
どの表示部として、消費電力が小さいことや、薄くでき
ることから反射型液晶表示装置が広く利用されている。
反射型液晶表示装置としては、液晶層の両面に設けられ
た一対の基板の外側に反射板を配設した外付けタイプの
ものが知られている。しかしながら、外付けタイプの反
射型液晶表示装置では、反射型液晶表示装置内に入射し
た光は、２枚の基板を通過してから反射板の反射膜に反
射されるため、明表示が暗くなってしまう。この問題を
軽減するために、一対の基板の間に、表面が鏡面状態と
された反射膜を配設し、光を通過させる基板を一枚のみ
とした内蔵タイプの反射型液晶表示装置がある。しかし
ながら、このような反射型液晶表示装置では、光の有効
利用が困難であるため、コントラストが低いという不都
合があった。2. Description of the Related Art In recent years, a reflection type liquid crystal display device has been widely used as a display portion of a handy type computer or the like because of its low power consumption and its thinness.
As a reflection type liquid crystal display device, an external type in which a reflection plate is disposed outside a pair of substrates provided on both surfaces of a liquid crystal layer is known. However, in the external reflection type liquid crystal display device, light incident on the reflection type liquid crystal display device is reflected by the reflection film of the reflection plate after passing through the two substrates, so that the bright display becomes dark. Would. In order to alleviate this problem, there is a built-in reflection type liquid crystal display device in which a reflection film having a mirror-finished surface is disposed between a pair of substrates, and only one substrate transmits light. . However, in such a reflection type liquid crystal display device, it is difficult to effectively use light, so that there is a disadvantage that contrast is low.
【０００３】この不都合を解決するために、図８に示す
ような、光を反射させる金属反射膜を凸凹に形成した内
蔵タイプの反射型液晶表示装置がある。図８において、
符号１ａは、第１基板を示し、符号１ｂは、第２基板を
示している。前記第２基板１ｂの第１基板１ａと対向す
る側の表面には、第２電極層９ｂと第２配向膜４ｂとが
順に形成され、反対側の表面には、位相差板５と偏光板
６とが順に積層されている。一方、第１基板１ａの第２
基板１ｂと対向する側の表面には、多数の凹凸を設けた
有機膜４４と、金属反射膜５４と、オーバーコート膜６
４と、第１電極層９４と、第１配向膜４ａとが順に積層
されている。前記オーバーコート層６４は、前記金属反
射膜５４上の凸凹を平坦化するとともに、前記金属反射
膜５４と前記電極層９４とを絶縁するために設けられて
いる。両面に上記の各層が設けられた第１基板１ａおよ
び第２基板１ｂと、これらに挟持されたシール材３とに
囲まれた空間内には、液晶層２が封入されている。In order to solve this inconvenience, there is a built-in reflection type liquid crystal display device in which a metal reflection film for reflecting light is formed unevenly as shown in FIG. In FIG.
Reference numeral 1a indicates a first substrate, and reference numeral 1b indicates a second substrate. A second electrode layer 9b and a second alignment film 4b are sequentially formed on the surface of the second substrate 1b on the side facing the first substrate 1a, and the retardation plate 5 and the polarizing plate are formed on the opposite surface. 6 are sequentially stacked. On the other hand, the second substrate of the first substrate 1a
On the surface on the side facing the substrate 1b, an organic film 44 having a large number of irregularities, a metal reflection film 54, an overcoat film 6
4, a first electrode layer 94, and a first alignment film 4a are sequentially stacked. The overcoat layer 64 is provided for flattening irregularities on the metal reflection film 54 and for insulating the metal reflection film 54 and the electrode layer 94 from each other. A liquid crystal layer 2 is sealed in a space surrounded by a first substrate 1a and a second substrate 1b provided with the above-described layers on both surfaces, and a sealing material 3 sandwiched therebetween.
【０００４】図９は、従来の反射型液晶表示装置の駆動
用素子を実装する側の基板の一例を示した平面図であ
る。図８および図９において、符号７は、駆動用素子実
装領域を示し、符号８は、表示領域を示している。ここ
での駆動用素子実装領域７とは、駆動用素子１６が実装
される領域のことであり、表示領域とは、液晶表示装置
の表示に使用される領域のことである。図８および図９
に示すように、駆動用素子実装領域７には、駆動用素子
１６が実装されている。図９に示す第１電極層９４は、
駆動用素子１６と電気的に接続される駆動用電極層であ
る。表示領域８から連続して形成された駆動用素子実装
領域７の駆動用電極層９４ａは、駆動用素子１６の一方
の端子と電気的に接続されている。また、駆動用素子１
６の他側の端子は、駆動用電極層９４ｃと接続されてい
る。FIG. 9 is a plan view showing an example of a substrate on which a driving element of a conventional reflection type liquid crystal display device is mounted. 8 and 9, reference numeral 7 denotes a driving element mounting area, and reference numeral 8 denotes a display area. Here, the driving element mounting area 7 is an area where the driving element 16 is mounted, and the display area is an area used for display of the liquid crystal display device. 8 and 9
As shown in (2), the driving element 16 is mounted in the driving element mounting area 7. The first electrode layer 94 shown in FIG.
The driving electrode layer is electrically connected to the driving element 16. The drive electrode layer 94 a of the drive element mounting area 7 formed continuously from the display area 8 is electrically connected to one terminal of the drive element 16. Also, the driving element 1
The other terminal 6 is connected to the driving electrode layer 94c.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、図９に
示す従来の反射型液晶表示装置では、第１基板１ａと有
機膜４４とが剥離しやすく、問題となっていた。とく
に、駆動用素子１６を実装する際に加熱加圧される部分
である駆動用素子実装領域７や、第１基板１ａの周縁部
１３は、剥離しやすく、問題となっていた。However, in the conventional reflection type liquid crystal display device shown in FIG. 9, the first substrate 1a and the organic film 44 are easily peeled off, which has been a problem. In particular, the driving element mounting area 7 which is heated and pressurized when the driving element 16 is mounted, and the peripheral portion 13 of the first substrate 1a are easily peeled, which is a problem.
【０００６】よって、本発明は、上記のような問題を解
決し、前記有機膜と基板との剥離を防ぐことができる信
頼性に優れた反射型液晶表示装置を提供することを課題
としている。Accordingly, it is an object of the present invention to solve the above problems and to provide a highly reliable reflective liquid crystal display device capable of preventing the organic film from peeling off from the substrate.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
に、本発明の反射型液晶表示装置は、一対の基板と、前
記一対の基板の間に挟持されたシール材とに囲まれた空
間内に液晶層が封入され、前記一対の基板のうち、一方
の基板の他方の基板と対向する面には、多数の凹凸を有
する有機膜と、金属反射膜と、オーバーコート膜と、電
極層とが順に設けられ、前記有機膜の上方に前記有機膜
の内部応力を打ち消す方向の内部応力を有する応力緩和
膜が設けられたことを特徴とする。In order to solve the above-mentioned problems, a reflection type liquid crystal display device according to the present invention comprises a space surrounded by a pair of substrates and a sealing material sandwiched between the pair of substrates. A liquid crystal layer is sealed therein, and among the pair of substrates, a surface of one of the substrates facing the other substrate has an organic film having a large number of irregularities, a metal reflective film, an overcoat film, and an electrode layer. Are sequentially provided, and a stress relaxation film having an internal stress in a direction to cancel the internal stress of the organic film is provided above the organic film.
【０００８】反射型液晶表示装置の一方の基板と有機膜
との密着力は、前記一方の基板と有機膜との界面におけ
る接着力と、前記有機膜の内部応力によって決定され
る。この内部応力は、基板と有機膜との密着力を低下さ
せ、基板と有機膜との剥離を促す。本発明の反射型液晶
表示装置は、前記有機膜の上方に前記有機膜の内部応力
を打ち消す方向の内部応力を有する応力緩和膜が設けら
れたものであるので、応力緩和膜の内部応力によって、
有機膜の内部応力を打ち消し、基板と有機膜との密着力
の低下を抑止し、前記有機膜と基板との剥離を防ぐこと
ができる。したがって、信頼性に優れた反射型液晶表示
装置となる。The adhesion between one substrate of the reflection type liquid crystal display device and the organic film is determined by the adhesive force at the interface between the one substrate and the organic film and the internal stress of the organic film. This internal stress reduces the adhesion between the substrate and the organic film, and promotes the separation between the substrate and the organic film. Since the reflection type liquid crystal display device of the present invention is provided with a stress relaxation film having an internal stress in a direction to cancel the internal stress of the organic film above the organic film, by the internal stress of the stress relaxation film,
The internal stress of the organic film can be canceled, the decrease in the adhesion between the substrate and the organic film can be suppressed, and the separation of the organic film from the substrate can be prevented. Therefore, a reflective liquid crystal display device having excellent reliability can be obtained.
【０００９】上記の反射型液晶表示装置においては、前
記応力緩和膜は、前記一方の基板上に実装される駆動用
素子および前記電極層と電気的に接続されない透明導電
膜からなるものであることが好ましい。このような反射
型液晶表示装置とすることで、電極層を形成する際に、
同時に応力緩和膜を形成することが可能となり、製造工
程を増やすことなく、容易に製造できるものとすること
ができる。In the above-mentioned reflection type liquid crystal display device, the stress relaxation film is formed of a driving element mounted on the one substrate and a transparent conductive film not electrically connected to the electrode layer. Is preferred. With such a reflective liquid crystal display device, when forming an electrode layer,
At the same time, it is possible to form a stress relaxation film, and it is possible to easily manufacture the film without increasing the number of manufacturing steps.
【００１０】また、上記の反射型液晶表示装置において
は、前記応力緩和膜は、駆動用素子実装領域に形成され
ていることが望ましい。本発明において「駆動用素子実
装領域」とは、駆動用素子が実装される領域のことをい
う。さらに、上記の反射型液晶表示装置においては、前
記応力緩和膜は、前記一方の基板の周縁部に形成されて
いることが望ましい。In the above-mentioned reflection type liquid crystal display device, it is desirable that the stress relaxation film is formed in a driving element mounting region. In the present invention, the “drive element mounting region” refers to a region where the drive element is mounted. Further, in the above-mentioned reflection type liquid crystal display device, it is preferable that the stress relaxation film is formed on a peripheral portion of the one substrate.
【００１１】このような反射型液晶表示装置とすること
で、とくに剥離しやすい、駆動用素子を実装する際に加
熱加圧される部分である駆動用素子実装領域と、基板の
周縁部の剥離を防ぐことができ、より一層信頼性に優れ
た反射型液晶表示装置とすることができる。By adopting such a reflective liquid crystal display device, the driving element mounting area, which is a part which is particularly easily peeled and which is heated and pressed when mounting the driving element, is separated from the periphery of the substrate. Can be prevented, and a more reliable reflective liquid crystal display device can be obtained.
【００１２】[0012]
【発明の実施の形態】図１は、本発明の反射型液晶表示
装置の駆動用素子を実装する側の基板の一例を示した平
面図である。本発明の反射型液晶表示装置が図９に示す
従来の反射型液晶表示装置と異なるところは、第１電極
層９４が、駆動用素子１６と電気的に接続される駆動用
電極層９４ａ、９４ｃと、駆動用素子１６と電気的に接
続されないダミー電極層９４ｄとからなるところであ
る。FIG. 1 is a plan view showing an example of a substrate on which a driving element of a reflection type liquid crystal display device of the present invention is mounted. The difference between the reflection type liquid crystal display device of the present invention and the conventional reflection type liquid crystal display device shown in FIG. 9 is that the first electrode layer 94 is provided with driving electrode layers 94a and 94c electrically connected to the driving element 16. And a dummy electrode layer 94d that is not electrically connected to the driving element 16.
【００１３】図１および図８に示すように、駆動用素子
実装領域７の前記オーバーコート膜６４上には、異方性
導電フィルム（以下、「ＡＣＦ」と略記する）１０を介
して駆動用素子１６が実装されている。ＡＣＦ１０は、
導電性フィラー１０ａを有し、加熱加圧することによ
り、導電性が得られるものである。前記駆動用電極層９
４ａは、図１に示すように、表示領域８から駆動用素子
実装領域７にわたって連続して形成され、駆動用素子実
装領域７で、ＡＣＦ１０を介して駆動用素子１６の一側
の端子１１ａと電気的に接続されている。また、駆動用
電極層９４ｃは、前記駆動用素子１６の他側の端子１１
ｂと、ＡＣＦ１０を介して電気的に接続されている。駆
動用電極層９４ａおよび９４ｃには、透明導電膜を形成
するＩＴＯ（インジウムスズ酸化物）などが使用されて
いる。前記駆動用電極層９４ａおよび９４ｃの内部応力
は、図８の矢印Ａおよび矢印Ｂで示すように、膜が伸び
ようとする応力で圧縮応力である。As shown in FIGS. 1 and 8, a driving element 10 is provided on the overcoat film 64 in the driving element mounting area 7 via an anisotropic conductive film (hereinafter abbreviated as “ACF”) 10. The element 16 is mounted. ACF10 is
It has a conductive filler 10a, and can obtain conductivity by heating and pressing. The drive electrode layer 9
As shown in FIG. 1, 4a is formed continuously from the display area 8 to the driving element mounting area 7. The driving element mounting area 7 is connected to the terminal 11a on one side of the driving element 16 via the ACF 10. It is electrically connected. The driving electrode layer 94c is connected to the terminal 11 on the other side of the driving element 16.
b and is electrically connected via the ACF 10. For the drive electrode layers 94a and 94c, ITO (indium tin oxide) for forming a transparent conductive film or the like is used. The internal stresses of the drive electrode layers 94a and 94c are compressive stresses, as indicated by arrows A and B in FIG.
【００１４】また、ダミー電極層９４ｄは、駆動用素子
実装領域７の駆動用電極層９４ａおよび９４ｃが形成さ
れている部分と、駆動用素子１６が実装されている部分
とを除いた部分に形成されている。ダミー電極９４ｄの
幅は、とくに限定されない。このダミー電極層９４ｄ
は、前記駆動用素子１６との電気的な接続には用いられ
ていない。また、ダミー電極９４ｄは、駆動用電極層９
４ａおよび９４ｃと同様に、透明導電膜を形成するＩＴ
Ｏ（インジウムスズ酸化物）などで形成されている。こ
のダミー電極層９４ｄの内部応力も前記駆動用電極層９
４ａおよび９４ｃと同様に、膜が伸びようとする応力で
圧縮応力である。The dummy electrode layer 94d is formed in a portion of the driving element mounting region 7 excluding a portion where the driving electrode layers 94a and 94c are formed and a portion where the driving element 16 is mounted. Have been. The width of the dummy electrode 94d is not particularly limited. This dummy electrode layer 94d
Are not used for electrical connection with the driving element 16. In addition, the dummy electrode 94d is connected to the driving electrode layer 9.
4a and 94c, IT for forming a transparent conductive film
It is formed of O (indium tin oxide) or the like. The internal stress of the dummy electrode layer 94d also depends on the driving electrode layer 9.
Similar to 4a and 94c, the stress at which the film tends to elongate is a compressive stress.
【００１５】第１基板１ａとしては、０．７ｍｍ程度の
厚さの透明なガラス板などが使用される。有機膜４４の
材質としては、アクリル系レジスト、ポリスチレン系レ
ジスト、アジドゴム系レジスト、イミド系レジストなど
の感光性樹脂などが用いられ、具体的には、ＣＦＰＲ０
１７Ｓ（商品名：東京応化工業（株）製）などが好適に
使用される。この有機膜４４の内部応力は、図８の矢印
Ｃで示すように、膜が縮もうとする応力で引張応力であ
る。As the first substrate 1a, a transparent glass plate having a thickness of about 0.7 mm is used. As a material of the organic film 44, a photosensitive resin such as an acrylic resist, a polystyrene resist, an azide rubber resist, and an imide resist is used.
17S (trade name: manufactured by Tokyo Ohka Kogyo Co., Ltd.) or the like is preferably used. As shown by an arrow C in FIG. 8, the internal stress of the organic film 44 is a stress that causes the film to shrink and is a tensile stress.
【００１６】金属反射膜５４は、アルミニウムや銀など
の金属で形成されている。オーバーコート膜６４の材質
としては、例えば、熱硬化性のアクリル樹脂などが使用
される。具体的には、ＪＳＳ９８４（商品名：ＪＳＲ
（株）製）などが好適に使用される。The metal reflection film 54 is formed of a metal such as aluminum or silver. As a material of the overcoat film 64, for example, a thermosetting acrylic resin or the like is used. Specifically, JSS984 (trade name: JSR
And the like are preferably used.
【００１７】一方、第２基板１ｂとしては、第１基板と
同様に０．７ｍｍ程度の厚さの透明なガラス板などが使
用され、第２電極層９ｂとしては、第１電極層９４と同
様にＩＴＯ（インジウムスズ酸化物）などが使用されて
いる。また、位相差板５は、ポリカーボネート樹脂やポ
リアリレート樹脂などで形成されている。また、第１配
向膜４ａおよび第２配向膜４ｂとしては、ポリイミド樹
脂などにより形成された高分子膜をラビング処理したも
のなどが使用される。On the other hand, as the second substrate 1b, a transparent glass plate having a thickness of about 0.7 mm is used similarly to the first substrate, and the second electrode layer 9b is the same as the first electrode layer 94. For example, ITO (indium tin oxide) is used. Further, the retardation plate 5 is formed of a polycarbonate resin, a polyarylate resin, or the like. As the first alignment film 4a and the second alignment film 4b, those obtained by rubbing a polymer film formed of a polyimide resin or the like are used.
【００１８】このような反射型液晶表示装置を製造する
には、例えば、ガラスからなる第１基板１ａの上に、図
２に示すように、感光性樹脂液であるＣＦＰＲ０１７Ｓ
（商品名：東京応化工業（株）製）をスピンコートによ
り５００ｒｐｍ、３０秒の条件で塗布し、この感光性樹
脂液をホットプレートにより８０℃で１０秒加熱するプ
リベークを行い、感光性樹脂層４４ａとする。続いて、
周縁に平坦部１４ａを有する転写型１４の型面を、前記
感光性樹脂層４４ａに５０ｋｇ／ｃｍ2の圧力で押し付
けて、図２に示す表示領域８の感光性樹脂層４４ａの表
面に転写型１４の型面１４ａの凸部を転写し、図３に示
すように、多数の凹部を形成する。ついで、第１基板１
ａの裏面側（図示下側）から露光量１００ｍＪ／ｃｍ2
の紫外線などの光線２０を照射し、多数の凹凸が形成さ
れた感光性樹脂層４４ｂを硬化させ、転写型１４を感光
性樹脂層４４ｂから外して、２４０℃で３０分加熱する
ポストベークを行って、図４に示す有機膜４４とする。In order to manufacture such a reflection type liquid crystal display device, for example, as shown in FIG. 2, a photosensitive resin liquid CFPR017S is formed on a first substrate 1a made of glass.
(Trade name: manufactured by Tokyo Ohka Kogyo Co., Ltd.) is applied by spin coating under the conditions of 500 rpm and 30 seconds, and prebaked by heating the photosensitive resin solution at 80 ° C. for 10 seconds using a hot plate. 44a. continue,
The mold surface of the transfer mold 14 having a flat portion 14a on the periphery is pressed against the photosensitive resin layer 44a at a pressure of 50 kg / cm 2 , and the transfer mold 14 is pressed onto the surface of the photosensitive resin layer 44a in the display area 8 shown in FIG. The protrusions on the mold surface 14a of the 14 are transferred to form a number of recesses as shown in FIG. Then, the first substrate 1
The exposure amount is 100 mJ / cm 2 from the back side of FIG.
The photosensitive resin layer 44b on which a large number of irregularities are formed is cured by irradiating a light beam 20 such as ultraviolet light, the transfer mold 14 is removed from the photosensitive resin layer 44b, and post-baking is performed by heating at 240 ° C. for 30 minutes. Thus, an organic film 44 shown in FIG. 4 is obtained.
【００１９】さらに、有機膜４４の表示領域８上に、例
えば、アルミニウムを蒸着して、図５に示す反射膜５４
を形成する。その後、図６に示すように、ＪＳＳ９８４
（商品名：ＪＳＲ（株）製）をスピンコートにより１０
００ｒｐｍ、１０秒の条件で塗布し、２３０℃で３０分
焼成して硬化させることにより、オーバーコート膜６１
を形成する。ついで、オーバーコート膜６４の上に、例
えば、ＩＴＯをスパッタして成膜する。このＩＴＯを一
般的な方法などにより、ポジ型レジストなどを塗布し、
フォトマスクを使用して、露光、現像、エッチングを行
い、図１に示す前記駆動用電極層９４ａ、９４ｃとダミ
ー電極９４ｄとを同時に形成して第１電極層９４とし、
さらにその上に、第１配向膜４ａを形成する。Further, for example, aluminum is vapor-deposited on the display area 8 of the organic film 44 to form a reflective film 54 shown in FIG.
To form Thereafter, as shown in FIG.
(Trade name: manufactured by JSR Corporation) by spin coating
The overcoat film 61 is applied under the conditions of 00 rpm and 10 seconds, and baked at 230 ° C. for 30 minutes to be cured.
To form Next, on the overcoat film 64, for example, ITO is formed by sputtering. This ITO is coated with a positive resist by a general method, etc.
Using a photomask, exposure, development, and etching are performed to simultaneously form the driving electrode layers 94a and 94c and the dummy electrodes 94d shown in FIG.
Further, a first alignment film 4a is formed thereon.
【００２０】続いて、第２の基板１ｂの第１電極層９ａ
と対向する側の表面に、第２電極層９ｂと第２配向膜４
ｂとを順に形成し、反対側の表面に、位相差板５と偏光
板６とを順に形成する。そして、第１電極層９ａ側と第
２電極層９ｂ側とを対向させた状態で、第１基板１ａと
第２基板１ｂとにシール材３を挟持させて、第１基板１
ａと第２基板１ｂとシール材３とに囲まれた空間を形成
し、前記空間内に液晶を封入して液晶層２を形成するこ
とにより、図１に示す反射型液晶表示装置が得られる。Subsequently, the first electrode layer 9a of the second substrate 1b
The second electrode layer 9b and the second alignment film 4
b are formed in order, and a retardation plate 5 and a polarizing plate 6 are formed in order on the opposite surface. Then, in a state where the first electrode layer 9a side and the second electrode layer 9b side face each other, the sealing material 3 is sandwiched between the first substrate 1a and the second substrate 1b.
a, a liquid crystal layer 2 is formed by enclosing a liquid crystal in the space, whereby the reflection type liquid crystal display device shown in FIG. 1 is obtained. .
【００２１】図８に示す反射型液晶表示装置において、
有機膜４４の内部応力は、図８の矢印Ｃで示すように、
膜が縮もうとする応力で引張応力である。この引張応力
は、第１基板１ａと有機膜４４との密着力を低下させ、
第１基板１ａと有機膜４４との剥離を促す。反対に、第
１の電極層９４を形成する駆動用電極層９４ａ、９４ｃ
の内部応力は、図８の矢印Ａおよび矢印Ｂで示すよう
に、膜が伸びようとする応力で圧縮応力である。この圧
縮応力は、有機膜４４の内部応力である引張応力を打ち
消し、低下させる。In the reflection type liquid crystal display device shown in FIG.
As shown by the arrow C in FIG.
The stress at which the film tends to shrink is the tensile stress. This tensile stress reduces the adhesion between the first substrate 1a and the organic film 44,
The separation between the first substrate 1a and the organic film 44 is promoted. Conversely, the driving electrode layers 94a and 94c forming the first electrode layer 94
Is an compressive stress, which is a stress at which the film tends to elongate, as shown by arrows A and B in FIG. This compressive stress negates and reduces the tensile stress that is the internal stress of the organic film 44.
【００２２】このような反射型液晶表示装置では、有機
膜４４の上方に、有機膜４４の内部応力を打ち消す方向
の内部応力を有する応力緩和膜として、ダミー電極層９
４ｄを設けたので、駆動用電極層９４ａ、９４ｃおよび
ダミー電極層９４ｄの内部応力である圧縮応力によっ
て、有機膜４４の内部応力である引張応力を打ち消し
て、第１基板１ａと有機膜４４との密着力の低下を抑止
することができ、有機膜４４と第１基板１ａとの剥離を
防ぐことができる。したがって、信頼性に優れた反射型
液晶表示装置となる。In such a reflection type liquid crystal display device, the dummy electrode layer 9 is formed above the organic film 44 as a stress relieving film having an internal stress in a direction to cancel the internal stress of the organic film 44.
4d, the tensile stress, which is the internal stress of the organic film 44, is canceled out by the compressive stress, which is the internal stress of the driving electrode layers 94a, 94c and the dummy electrode layer 94d. Of the organic film 44 and the first substrate 1a can be prevented. Therefore, a reflective liquid crystal display device having excellent reliability can be obtained.
【００２３】また、ダミー電極層９４ｄを、駆動用素子
１６および駆動用電極層９４ａ、９４ｃと電気的に接続
されないものとするとともに、駆動用電極層９４ａおよ
び９４ｃと同様の材質で形成したので、駆動用電極層９
４ａ、９４ｃを形成する際に、駆動用電極層９４ａおよ
び９４ｃと同様の方法でダミー電極層９４ｄを形成する
ことが可能となる。したがって、製造工程を増やすこと
なく、容易に製造できる反射型液晶表示装置となる。Further, since the dummy electrode layer 94d is not electrically connected to the driving element 16 and the driving electrode layers 94a and 94c and is formed of the same material as the driving electrode layers 94a and 94c, Driving electrode layer 9
When forming 4a and 94c, it becomes possible to form dummy electrode layer 94d in the same manner as drive electrode layers 94a and 94c. Therefore, the reflection type liquid crystal display device can be easily manufactured without increasing the number of manufacturing steps.
【００２４】また、ダミー電極層９４ｄが、駆動用素子
実装領域７に形成されているので、とくに剥離しやすい
部分である、駆動用素子実装領域７の剥離を防ぐことが
でき、より一層信頼性に優れた反射型液晶表示装置とす
ることができる。Further, since the dummy electrode layer 94d is formed in the driving element mounting area 7, the driving element mounting area 7, which is a particularly easy-to-peel portion, can be prevented from being separated, and the reliability is further improved. And a reflection type liquid crystal display device having excellent characteristics.
【００２５】本発明の反射型液晶表示装置においては、
上述したように、応力緩和膜であるダミー電極層９４ｄ
を駆動用素子実装領域７に設けることができるが、前記
第１の基板１ａの周縁部１３に設けてもよいし、図７に
示すように、駆動用素子実装領域７と第１基板１ａの周
縁部１３の両方に設けてもよい。このような反射型液晶
表示装置とすることで、とくに剥離しやすい部分であ
る、駆動用素子実装領域７と第１基板１ａの周縁部１３
の剥離を防ぐことができ、より一層信頼性に優れた反射
型液晶表示装置とすることができる。In the reflection type liquid crystal display device of the present invention,
As described above, the dummy electrode layer 94d which is a stress relaxation film
Can be provided in the driving element mounting area 7, but may be provided in the peripheral portion 13 of the first substrate 1 a, or as shown in FIG. 7, the driving element mounting area 7 and the first substrate 1 a It may be provided on both of the peripheral portions 13. With such a reflective liquid crystal display device, the driving element mounting region 7 and the peripheral portion 13 of the first substrate 1a, which are particularly easy to separate, are provided.
Can be prevented from peeling off, and a more reliable reflective liquid crystal display device can be obtained.
【００２６】また、本発明の反射型液晶表示装置におい
ては、応力緩和膜であるダミー電極層９４ｄは、上述し
たように、駆動用電極層９４ａ、９４ｃと同様の材質と
することができるが、有機膜４４の内部応力を打ち消す
方向の内部応力を有する膜を形成しうる材質であれば、
必ずしも駆動用電極層９４ａ、９４ｃと同様の材質でな
くてもよい。例えば、ダミー電極層９４ｄを、ＳｉＯ2
などからなるものとすることもできる。In the reflection type liquid crystal display device of the present invention, the dummy electrode layer 94d, which is a stress relaxation film, can be made of the same material as the drive electrode layers 94a and 94c as described above. As long as the material can form a film having an internal stress in a direction to cancel the internal stress of the organic film 44,
It is not always necessary to use the same material as the driving electrode layers 94a and 94c. For example, the dummy electrode layer 94d is made of SiO 2
Etc.
【００２７】[0027]
【発明の効果】以上、詳細に説明したように、本発明の
反射型液晶表示装置は、有機膜の上方に、有機膜の内部
応力を打ち消す方向の内部応力を有する応力緩和膜が設
けられているので、応力緩和膜の内部応力によって、有
機膜の内部応力を打ち消し、基板と有機膜との密着力の
低下を抑止し、有機膜と基板との剥離を防ぐことができ
る。したがって、信頼性に優れた反射型液晶表示装置と
なる。As described in detail above, in the reflection type liquid crystal display device of the present invention, a stress relaxation film having an internal stress in a direction to cancel the internal stress of the organic film is provided above the organic film. Therefore, the internal stress of the organic film can be canceled by the internal stress of the stress relaxation film, a decrease in the adhesion between the substrate and the organic film can be suppressed, and the separation of the organic film from the substrate can be prevented. Therefore, a reflective liquid crystal display device having excellent reliability can be obtained.
【図１】 本発明の反射型液晶表示装置の駆動用素子を
実装する側の基板の一例を示した平面図である。FIG. 1 is a plan view showing an example of a substrate on which a driving element of a reflection type liquid crystal display device of the present invention is mounted.
【図２】 本発明の反射型液晶表示装置の製造過程を示
す図であって、第１基板上に、感光性樹脂液を塗布した
状況を示す図である。FIG. 2 is a view showing a manufacturing process of the reflection type liquid crystal display device of the present invention, and is a view showing a state where a photosensitive resin liquid is applied on a first substrate.
【図３】 本発明の反射型液晶表示装置の製造過程を示
す図であって、転写型の押し付け状況および光線の照射
状況を示す図である。FIG. 3 is a diagram showing a manufacturing process of the reflective liquid crystal display device of the present invention, showing a pressing state of a transfer mold and a light irradiation state.
【図４】 本発明の反射型液晶表示装置の製造過程を示
す図であって、現像後の有機膜の状況を示す図である。FIG. 4 is a view showing a process of manufacturing the reflection type liquid crystal display device of the present invention and showing a state of an organic film after development.
【図５】 本発明の反射型液晶表示装置の製造過程を示
す図であって、有機膜上に金属反射膜を形成した状況を
示す図である。FIG. 5 is a diagram illustrating a manufacturing process of the reflective liquid crystal display device according to the present invention, and is a diagram illustrating a state in which a metal reflective film is formed on an organic film.
【図６】 本発明の反射型液晶表示装置の製造過程を示
す図であって、オーバーコート膜を形成した状況を示す
図である。FIG. 6 is a diagram showing a manufacturing process of the reflection type liquid crystal display device of the present invention, showing a state in which an overcoat film is formed.
【図７】 本発明の反射型液晶表示装置の駆動用素子を
実装する側の基板の他の例を示した平面図である。FIG. 7 is a plan view showing another example of the substrate on the side on which the driving elements of the reflective liquid crystal display device of the present invention are mounted.
【図８】 反射型液晶表示装置の一例を示した平面図で
ある。FIG. 8 is a plan view showing an example of a reflection type liquid crystal display device.
【図９】 従来の反射型液晶表示装置の駆動用素子を実
装する側の基板の一例を示した平面図である。FIG. 9 is a plan view showing an example of a substrate on a side on which a driving element of a conventional reflective liquid crystal display device is mounted.
１ａ 第１基板 １ｂ 第２基板 ２ 液晶層 ３ シール材 ４ａ 第１配向膜 ４ｂ 第２配向膜 ５ 位相差板 ６ 偏光板 ７ 駆動用素子実装領域 １０ ＡＣＦ １６ 駆動用素子 １３ 周縁部 ４４ 有機膜 ５４ 金属反射膜 ６４ オーバーコート膜 ９４ 第１電極層 ９４ａ、９４ｃ 駆動用電極層 ９４ｄ ダミー電極層 ９ｂ 第２電極層 Reference Signs List 1a first substrate 1b second substrate 2 liquid crystal layer 3 sealing material 4a first alignment film 4b second alignment film 5 retardation plate 6 polarizing plate 7 driving element mounting area 10 ACF 16 driving element 13 peripheral part 44 organic film 54 Metal reflective film 64 Overcoat film 94 First electrode layer 94a, 94c Driving electrode layer 94d Dummy electrode layer 9b Second electrode layer
フロントページの続き Ｆターム(参考） 2H090 HA05 HC12 HD06 JA05 JA08 JB02 JB03 JC07 LA01 2H091 FA14Y FA34Y FC02 GA02 GA16 LA30 2H092 GA17 HA05 HA24 MA04 MA05 MA15 MA17 NA18 PA01 PA02 PA09 Continued on the front page F term (reference) 2H090 HA05 HC12 HD06 JA05 JA08 JB02 JB03 JC07 LA01 2H091 FA14Y FA34Y FC02 GA02 GA16 LA30 2H092 GA17 HA05 HA24 MA04 MA05 MA15 MA17 NA18 PA01 PA02 PA09
Claims (4)
持されたシール材とに囲まれた空間内に液晶層が封入さ
れ、 前記一対の基板のうち、一方の基板の他方の基板と対向
する面には、多数の凹凸を有する有機膜と、金属反射膜
と、オーバーコート膜と、電極層とが順に設けられ、 前記有機膜の上方に前記有機膜の内部応力を打ち消す方
向の内部応力を有する応力緩和膜が設けられたことを特
徴とする反射型液晶表示装置。1. A liquid crystal layer is sealed in a space surrounded by a pair of substrates and a sealing material sandwiched between the pair of substrates, and the other of the pair of substrates is one of the substrates. An organic film having a large number of concavities and convexities, a metal reflective film, an overcoat film, and an electrode layer are provided in this order on the surface opposed to the organic film, and a direction in which the internal stress of the organic film is canceled above the organic film. A reflection type liquid crystal display device comprising a stress relaxation film having an internal stress.
実装される駆動用素子および前記電極層と電気的に接続
されない透明導電膜からなることを特徴とする請求項１
に記載の反射型液晶表示装置。2. The device according to claim 1, wherein the stress relaxation film is formed of a driving element mounted on the one substrate and a transparent conductive film that is not electrically connected to the electrode layer.
4. The reflection type liquid crystal display device according to 1.
に形成されたことを特徴とする請求項１または２に記載
の反射型液晶表示装置。3. The reflection type liquid crystal display device according to claim 1, wherein the stress relaxation film is formed in a driving element mounting region.
縁部に形成されたことを特徴とする請求項１ないし３に
記載の反射型液晶表示装置。4. The reflection type liquid crystal display device according to claim 1, wherein the stress relaxation film is formed on a peripheral portion of the one substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03654799A JP3697363B2 (en) | 1999-02-15 | 1999-02-15 | Reflective liquid crystal display device and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03654799A JP3697363B2 (en) | 1999-02-15 | 1999-02-15 | Reflective liquid crystal display device and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| JP2000235182A true JP2000235182A (en) | 2000-08-29 |
| JP3697363B2 JP3697363B2 (en) | 2005-09-21 |
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ID=12472806
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002189225A (en) * | 2000-12-19 | 2002-07-05 | Optrex Corp | Mother substrate for reflection type liquid crystal display panel |
| JP2002202521A (en) * | 2000-12-28 | 2002-07-19 | Optrex Corp | Reflection type liquid crystal display panel |
| KR100790352B1 (en) * | 2001-05-22 | 2008-01-02 | 엘지.필립스 엘시디 주식회사 | Reflective and Transflective LCD and a method of fabricating thereof |
| JP2009047839A (en) * | 2007-08-17 | 2009-03-05 | Epson Imaging Devices Corp | Liquid crystal display |
-
1999
- 1999-02-15 JP JP03654799A patent/JP3697363B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002189225A (en) * | 2000-12-19 | 2002-07-05 | Optrex Corp | Mother substrate for reflection type liquid crystal display panel |
| JP4659977B2 (en) * | 2000-12-19 | 2011-03-30 | オプトレックス株式会社 | Mother board for reflective LCD panel |
| JP2002202521A (en) * | 2000-12-28 | 2002-07-19 | Optrex Corp | Reflection type liquid crystal display panel |
| JP4659979B2 (en) * | 2000-12-28 | 2011-03-30 | オプトレックス株式会社 | Reflective LCD panel |
| KR100790352B1 (en) * | 2001-05-22 | 2008-01-02 | 엘지.필립스 엘시디 주식회사 | Reflective and Transflective LCD and a method of fabricating thereof |
| JP2009047839A (en) * | 2007-08-17 | 2009-03-05 | Epson Imaging Devices Corp | Liquid crystal display |
| JP4631883B2 (en) * | 2007-08-17 | 2011-02-16 | ソニー株式会社 | Liquid crystal display |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3697363B2 (en) | 2005-09-21 |
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