JP2002352952A - Organic el display panel and manufacturing method therefor - Google Patents
Organic el display panel and manufacturing method thereforInfo
- Publication number
- JP2002352952A JP2002352952A JP2001155202A JP2001155202A JP2002352952A JP 2002352952 A JP2002352952 A JP 2002352952A JP 2001155202 A JP2001155202 A JP 2001155202A JP 2001155202 A JP2001155202 A JP 2001155202A JP 2002352952 A JP2002352952 A JP 2002352952A
- Authority
- JP
- Japan
- Prior art keywords
- organic
- layer
- sealing
- adhesive layer
- glass substrate
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 238000007789 sealing Methods 0.000 claims abstract description 95
- 239000000758 substrate Substances 0.000 claims abstract description 50
- 239000011521 glass Substances 0.000 claims abstract description 46
- 239000012790 adhesive layer Substances 0.000 claims description 53
- 239000010410 layer Substances 0.000 claims description 46
- 238000000034 method Methods 0.000 claims description 20
- 238000007639 printing Methods 0.000 claims description 16
- 238000007650 screen-printing Methods 0.000 claims description 14
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract description 8
- 230000001070 adhesive effect Effects 0.000 abstract description 8
- 238000004020 luminiscence type Methods 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000002274 desiccant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- RBTKNAXYKSUFRK-UHFFFAOYSA-N heliogen blue Chemical compound [Cu].[N-]1C2=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=NC([N-]1)=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=N2 RBTKNAXYKSUFRK-UHFFFAOYSA-N 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、基板上に発光層を
含む有機ＥＬ層を形成した有機ＥＬ（エレクトロルミネ
ッセンス）表示パネル及びその製造方法に関する。The present invention relates to an organic EL (electroluminescence) display panel having an organic EL layer including a light emitting layer formed on a substrate, and a method of manufacturing the same.
【０００２】[0002]
【従来の技術】有機ＥＬ表示パネルは、ガラス基板上に
ＩＴＯ等の透明電極からなる陽極を形成し、その上に有
機化合物からなる発光層を含む有機膜を形成し、その上
にＡｌ等の金属電極からなる陰極を形成した有機ＥＬ素
子を基本構成としており、この有機ＥＬ素子を単位面発
光要素として平面基板上に配列させることで画像表示を
行うものである。2. Description of the Related Art In an organic EL display panel, an anode made of a transparent electrode such as ITO is formed on a glass substrate, an organic film including a light emitting layer made of an organic compound is formed thereon, and an organic film such as Al An organic EL element having a cathode formed of a metal electrode is used as a basic structure, and an image is displayed by arranging the organic EL element as a unit surface light emitting element on a flat substrate.
【０００３】この有機ＥＬ表示パネルは、有機膜及び電
極が外気に曝されると特性が劣化することが知られてい
る。これは、有機膜と電極との界面に水分が浸入するこ
とにより、電子の注入が妨げられ、未発光領域としての
ダークスポットが発生したり、電極が腐食する現象によ
るもので、有機ＥＬ素子の安定性及び耐久性を高めるた
めには、有機ＥＬ素子を外気から遮断する封止技術が不
可欠となっている。この封止技術に関しては、各種の提
案がなされているが、生産性及び耐久性の面で有効な手
段として、電極及び有機膜が形成されたガラス基板上
に、この電極及び有機膜を覆う封止部材を接着する方法
が採用されている。It is known that the characteristics of this organic EL display panel are deteriorated when an organic film and electrodes are exposed to the outside air. This is due to the phenomenon that when water enters the interface between the organic film and the electrode, the injection of electrons is hindered, a dark spot as a non-light emitting region is generated, or the electrode is corroded. In order to enhance stability and durability, a sealing technique for shutting off the organic EL element from the outside air is indispensable. Various proposals have been made for this sealing technique, but as an effective means in terms of productivity and durability, a sealing method for covering the electrode and the organic film on a glass substrate on which the electrode and the organic film are formed. A method of bonding a stop member is employed.
【０００４】この封止部材をガラス基板上に接着する工
程について、図３（ａ），（ｂ）を参照して説明する。
電極及び有機膜の成膜工程を完了したガラス基板１に対
して、封止部材４を接着するには、ガラス基板１上又は
封止部材４の接着面上に有機ＥＬ層３の全周を囲うよう
に接着剤層２を形成する。図３（ａ）は、封止部材４側
に接着剤層２を形成した状態を示している。この接着剤
層２は、エポキシ樹脂等の紫外線硬化性又は、熱硬化性
樹脂が用いられ、ディスペンサによって封止部材４上に
塗布される。[0004] A process of bonding the sealing member on a glass substrate will be described with reference to FIGS.
In order to bond the sealing member 4 to the glass substrate 1 on which the electrode and organic film forming steps have been completed, the entire periphery of the organic EL layer 3 is formed on the glass substrate 1 or on the bonding surface of the sealing member 4. An adhesive layer 2 is formed so as to surround it. FIG. 3A shows a state where the adhesive layer 2 is formed on the sealing member 4 side. The adhesive layer 2 is made of an ultraviolet curable or thermosetting resin such as an epoxy resin, and is applied onto the sealing member 4 by a dispenser.
【０００５】そして、図３（ｂ）に示すように、ガラス
基板１をＮ２ガス雰囲気の封止装置５内へ移動し、封止
部材４とガラス基板１とを貼り合わせた後、封止装置５
の内部圧力を上昇させ、封止部材４内に生じる圧力との
差を解消した後、紫外線を照射してエポキシ樹脂を硬化
させ、封止部材４の周囲とガラス基板１とを接着させて
いる。Then, as shown in FIG. 3B, the glass substrate 1 is moved into a sealing device 5 in an N 2 gas atmosphere, and the sealing member 4 and the glass substrate 1 are bonded. Device 5
After the internal pressure of the sealing member 4 is increased to eliminate the difference from the pressure generated in the sealing member 4, the epoxy resin is cured by irradiating ultraviolet rays, and the periphery of the sealing member 4 and the glass substrate 1 are bonded. .
【０００６】[0006]
【発明が解決しようとする課題】上述した従来技術によ
ると、封止装置を用い、紫外線硬化前に封止部材内の圧
力差を解消させることで、歩留まりの向上を行ってい
る。しかしながら、圧力調整の工程が必要であり、生産
性を考えると封止装置の圧力調整を行わないことがより
望ましい。According to the above-mentioned prior art, the yield is improved by using a sealing device and eliminating the pressure difference in the sealing member before curing with ultraviolet rays. However, a pressure adjustment step is required, and it is more desirable not to adjust the pressure of the sealing device in view of productivity.
【０００７】つまり、ディスペンサを用いた接着剤層の
形成では、接着剤層の塗布高さが接着剤層の塗布高さを
正確に規制することが難しく、安価な塗布ロボットで確
実な封止を行おうとする場合、塗布高さのむらを考慮し
て接着剤の塗布高さを１００〜２００μｍと高くする必
要がある。このような高さの接着剤層に対して封止部材
を押し付けて接着させた場合には、接着剤層の高さは１
／１０程度まで押しつぶされ、接着剤層が封止領域の全
周を囲って形成されているため、接着剤層を押しつぶす
段階で封止部材の内部圧力が上昇して、封止領域内が
１.２気圧以上の正圧状態となってしまう。この圧力差
は、樹脂の塗布高さによって生じているため、塗布高さ
がばらつくことで発生する圧力にもばらつきが生じ、圧
力調整を行っていても封止工程終了後に封止不良を起こ
す原因となり、適切な状態ではない。That is, in the formation of an adhesive layer using a dispenser, it is difficult for the application height of the adhesive layer to accurately control the application height of the adhesive layer, and reliable sealing is performed by an inexpensive application robot. When trying to do so, it is necessary to increase the application height of the adhesive to 100 to 200 μm in consideration of unevenness in the application height. When the sealing member is pressed against and bonded to the adhesive layer having such a height, the height of the adhesive layer is 1
Since the pressure-sensitive adhesive layer is crushed to about / 10 and the adhesive layer is formed so as to surround the entire periphery of the sealing region, the internal pressure of the sealing member increases at the stage of crushing the adhesive layer, and the inside of the sealing region becomes 1%. . Positive pressure of more than 2 atmospheres. Since this pressure difference is caused by the application height of the resin, the pressure generated due to the variation in the application height also varies, and even if the pressure is adjusted, the cause of the sealing failure after the end of the sealing process is caused. Is not in an appropriate state.
【０００８】そこで、圧力調整無しに大気圧下で封止作
業を行う方法として、図４（ａ），（ｂ）に示すような
方法も提案されている。これは、ガラス基板１や封止部
材４上に、接着剤層２を有機ＥＬ層３の周囲に対して間
隔を開けた状態で塗布し、その間隔の両側に厚塗り部２
ａを形成したものである。これによると、ガラス基板１
と封止部材４を押し付けて接着すると、厚塗り部２ａが
潰されることにより接着剤層２を繋いで封止領域が形成
される。しかしながら、この方法によると、接着剤層の
塗布精度が悪くなり、接着剤層のはみ出し２ｂが生じる
ことで、ガラス基板１内のデッドスペースが大きくなる
問題があり、また、塗布むらなどにより封止領域内の圧
力が一定にならず、これによって封止不良を引き起こす
ことにもなる。Therefore, as a method of performing a sealing operation under atmospheric pressure without pressure adjustment, a method as shown in FIGS. 4A and 4B has been proposed. In this method, the adhesive layer 2 is applied on the glass substrate 1 and the sealing member 4 in a state where the adhesive layer 2 is spaced from the periphery of the organic EL layer 3, and the thick coating portions 2 are formed on both sides of the gap.
a is formed. According to this, the glass substrate 1
When the sealing member 4 is pressed and bonded, the thick coating portion 2a is crushed to connect the adhesive layer 2 to form a sealing region. However, according to this method, there is a problem that the application accuracy of the adhesive layer is deteriorated and the adhesive layer protrudes 2b, so that a dead space in the glass substrate 1 is increased. The pressure in the region will not be constant, which will also cause poor sealing.
【０００９】また、上述の従来技術によると、接着剤層
を形成するにあたって、ディスペンサを用いてガラス基
板や封止部材に対して一枚ずつ塗布しているが、塗布精
度だけでなく塗布作業にかなりの時間を要し、量産性の
面でも問題があった。Further, according to the above-mentioned prior art, when forming an adhesive layer, a dispenser is used to apply one sheet at a time to a glass substrate or a sealing member. It took a considerable amount of time, and there was a problem in terms of mass productivity.
【００１０】本発明は、このような事情に対処するため
に提案されたものであって、圧力調整の無い大気圧下で
封止作業を行った場合であっても封止不良を起こすこと
が無く、また、封止精度向上によって基板上のデッドス
ペースをより少なくすることが可能なり、また、量産性
の面でも優れた、有機ＥＬ表示パネル及びその製造方法
を提供することを目的とするものである。The present invention has been proposed in order to cope with such a situation, and even if a sealing operation is performed under atmospheric pressure without pressure adjustment, defective sealing may occur. Another object of the present invention is to provide an organic EL display panel and a method for manufacturing the same, which can reduce the dead space on the substrate by improving the sealing accuracy and which is excellent in mass productivity. It is.
【００１１】[0011]
【課題を解決するための手段】上記目的を達成するため
に、本発明は以下の特徴を備えるものである。In order to achieve the above object, the present invention has the following features.
【００１２】請求項１に係る発明は、ガラス基板上に形
成された発光層を含む有機ＥＬ層と、該有機ＥＬ層を覆
って封止する封止部材と、該封止部材を前記ガラス基板
に接着する接着剤層とを備えた有機ＥＬ表示パネルにお
いて、前記接着剤層は、設定高さの薄層を前記有機ＥＬ
層の全周を囲うように形成してなり、前記封止部材によ
る封止領域内を１気圧以上１.２気圧未満の圧力状態と
したことを特徴とする。[0012] The invention according to claim 1 is an organic EL layer including a light emitting layer formed on a glass substrate, a sealing member for covering and sealing the organic EL layer, and the sealing member for the glass substrate. An organic EL display panel having an adhesive layer that adheres to the organic EL display panel.
It is formed so as to surround the entire circumference of the layer, and the inside of the region sealed by the sealing member is set to a pressure state of 1 atm or more and less than 1.2 atm.
【００１３】請求項２に係る発明は、ガラス基板上に発
光層を含む有機ＥＬ層を蒸着する工程と、該有機ＥＬ層
を封止する封止工程とを含む有機ＥＬ表示パネルの製造
方法であって、前記封止工程は、前記有機ＥＬ層の全周
を囲う接着剤層をスクリーン印刷によって形成する工程
と、大気圧下で前記接着剤層を介して前記ガラス基板と
封止部材を接着させる工程とからなることを特徴とす
る。According to a second aspect of the present invention, there is provided a method for manufacturing an organic EL display panel including a step of depositing an organic EL layer including a light emitting layer on a glass substrate and a sealing step of sealing the organic EL layer. The sealing step includes forming an adhesive layer surrounding the entire periphery of the organic EL layer by screen printing, and bonding the glass substrate and the sealing member via the adhesive layer under atmospheric pressure. And the step of causing
【００１４】請求項３に係る発明は、請求項２に記載の
有機ＥＬ表示パネルの製造方法において、前記接着剤層
の印刷高さを２０〜１００μｍとすることを特徴とす
る。According to a third aspect of the present invention, in the method for manufacturing an organic EL display panel according to the second aspect, the printing height of the adhesive layer is set to 20 to 100 μm.
【００１５】請求項４に係る発明は、請求項２に記載の
有機ＥＬ表示パネルの製造方法において、前記接着剤層
の形成を１５０〜２３０メッシュ／インチのステンレス
製印刷メッシュを用いたスクリーン印刷により行うこと
を特徴とする。According to a fourth aspect of the present invention, in the method of manufacturing an organic EL display panel according to the second aspect, the adhesive layer is formed by screen printing using a stainless steel printing mesh of 150 to 230 mesh / inch. It is characterized by performing.
【００１６】上述の特徴を備えた本発明によると、以下
の作用をなすものである。According to the present invention having the above-described features, the following operations are performed.
【００１７】請求項１に係る発明によると、ガラス基板
上に形成された発光層を含む有機ＥＬ層と、該有機ＥＬ
層を覆って封止する封止部材と、該封止部材を前記ガラ
ス基板と接着する接着剤層とを備えた有機ＥＬ表示パネ
ルにおいて、接着剤層はガラス基板上又は封止部材の接
着面上に有機ＥＬ層の全周を囲うように形成されてお
り、その厚さを薄くして封止部材の接着時に封止領域内
が１．２気圧以上の正圧状態とならないようにしてい
る。これによると、封止領域内が過度の加圧状態となら
ず、接着後に封止不良を起こすことがない。According to the first aspect of the present invention, an organic EL layer including a light emitting layer formed on a glass substrate, and the organic EL layer
In an organic EL display panel including a sealing member that covers and seals a layer, and an adhesive layer that bonds the sealing member to the glass substrate, the adhesive layer is formed on the glass substrate or on an adhesive surface of the sealing member. It is formed so as to surround the entire periphery of the organic EL layer, and its thickness is reduced so that the inside of the sealing region does not become a positive pressure state of 1.2 atm or more when the sealing member is bonded. . According to this, the inside of the sealing region does not become excessively pressurized, and sealing failure does not occur after bonding.
【００１８】請求項２〜４に係る発明によると、接着材
層の形成にスクリーン印刷を用いることによって、精度
の高い薄層の接着剤層をガラス基板上又は封止部材の接
着面上に形成することができる。これによって、ガラス
基板上に封止部材を接着する際に接着剤層の押し付け変
位が少なくなり、大気圧下での作業によっても封止領域
内に過度の正圧が生じることがなく、接着後の封止不良
を回避することができる。接着剤層の印刷高さを２０〜
１００μｍとすることによって、封止領域内の圧力を
１.２気圧未満に抑えることが可能となる。According to the second to fourth aspects of the present invention, a high-precision thin adhesive layer is formed on the glass substrate or the bonding surface of the sealing member by using screen printing for forming the adhesive layer. can do. Thereby, when the sealing member is bonded on the glass substrate, the pressing displacement of the adhesive layer is reduced, and the working under the atmospheric pressure does not generate an excessive positive pressure in the sealing region. Can be avoided. Printing height of adhesive layer is 20 ~
By setting the thickness to 100 μm, the pressure in the sealing region can be suppressed to less than 1.2 atm.
【００１９】また、接着剤層の形成をスクリーン印刷に
よって行うことにより、精度の高い接着剤層の形成が可
能となり、接着剤のはみ出し等によるデッドスペースを
ガラス基板上に形成することがない。１５０〜２３０メ
ッシュ／インチのステンレス製印刷メッシュを用いたス
クリーン印刷を採用することにより、従来の紫外線硬化
性又は熱硬化性樹脂を接着剤として用い、高精度の印刷
を行うことができる。また、スクリーン印刷によって多
数枚のガラス基板や封止部材に対して速やかに接着剤層
を形成することができるので量産性にも適する。Further, by forming the adhesive layer by screen printing, it is possible to form the adhesive layer with high accuracy, and a dead space due to the protrusion of the adhesive is not formed on the glass substrate. By employing screen printing using a stainless steel printing mesh of 150 to 230 mesh / inch, high-precision printing can be performed using a conventional ultraviolet curable or thermosetting resin as an adhesive. In addition, since an adhesive layer can be quickly formed on a large number of glass substrates and sealing members by screen printing, it is suitable for mass productivity.
【００２０】[0020]
【発明の実施の形態】以下、本発明の実施例を図面を参
照して説明する。図１は本発明の一実施形態に係る有機
ＥＬ表示パネルを示している。図において、ガラス基板
１０上には有機ＥＬ層１１が形成されており、この有機
ＥＬ層１１の全周を囲って接着剤層１２が形成され、こ
の接着剤層１２を介して、封止部材１３の接着面がガラ
ス基板１０上に接着されている。封止部材１３内にはポ
ケット部１３ａが形成されており、このポケット部１３
ａ内には乾燥剤１４が配設されている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an organic EL display panel according to one embodiment of the present invention. In the figure, an organic EL layer 11 is formed on a glass substrate 10, an adhesive layer 12 is formed around the entire periphery of the organic EL layer 11, and a sealing member is formed via the adhesive layer 12. 13 is adhered on the glass substrate 10. A pocket 13 a is formed in the sealing member 13, and the pocket 13 a
A desiccant 14 is provided in a.
【００２１】ここで、有機ＥＬ層は、ガラス基板１０上
に形成されたＩＴＯ等の透明電極からなる陽極上に、例
えば、銅フタロシアニンからなる正孔注入層、ＴＤＰ等
からなる正孔輸送層、Ａｌｑ３等からなる発光層又は電
子輸送層、ＬｉＯ２からなる電子注入層、Ａｌ等からな
る陽極が順次積層されて形成されたものである。Here, the organic EL layer is formed on a positive electrode made of a transparent electrode such as ITO formed on the glass substrate 10 by, for example, a hole injection layer made of copper phthalocyanine, a hole transport layer made of TDP or the like, It is formed by sequentially laminating a light emitting layer or an electron transport layer made of Alq 3 or the like, an electron injection layer made of LiO 2 , and an anode made of Al or the like.
【００２２】そして、接着剤層１２としては、エポキシ
樹脂等の紫外線硬化性又は熱硬化性の樹脂が用いられ、
これをスクリーン印刷によって薄層に形成したものであ
る。封止部材１３は、金属（ＳＵＳ缶）又はガラスから
なる部材であって、その周辺が接着剤層１２を介してガ
ラス基板１０上に接着されており、有機ＥＬ層１１を覆
って、これを外気から遮断している。ここで、封止部材
１３内の封止領域１５は、大気圧以上で１.２気圧未満
の圧力状態に維持されている。As the adhesive layer 12, an ultraviolet curable or thermosetting resin such as an epoxy resin is used.
This is formed into a thin layer by screen printing. The sealing member 13 is a member made of metal (SUS can) or glass, the periphery of which is adhered to the glass substrate 10 via the adhesive layer 12, and covers the organic EL layer 11. Shielded from outside air. Here, the sealing region 15 in the sealing member 13 is maintained at a pressure of not less than atmospheric pressure and less than 1.2 atm.
【００２３】以下、図２（ａ），（ｂ）によって、上述
の実施形態に係る有機ＥＬ表示パネルの製造方法を説明
する。まず、従前の工程によって、ガラス基板１０上に
上述の有機ＥＬ層１１が蒸着される（図２（ａ））。そ
して、封止部材１３の周辺に、ガラス基板１０上に蒸着
された有機ＥＬ層１１の全周を囲むように接着剤層１２
が形成される。この接着剤層１２は、スクリーン印刷に
よって設、定した印刷厚さｘを高精度に維持して形成さ
れるが、その印刷厚さｘは、２０〜１００μｍ、好まし
くは５０μｍに設定される。スクリーン印刷に用いられ
るメッシュは、１５０〜２３０メッシュ／インチのステ
ンレス製印刷メッシュが用いられる。Hereinafter, a method for manufacturing the organic EL display panel according to the above-described embodiment will be described with reference to FIGS. First, the organic EL layer 11 described above is deposited on the glass substrate 10 by a conventional process (FIG. 2A). The adhesive layer 12 is formed around the sealing member 13 so as to surround the entire periphery of the organic EL layer 11 deposited on the glass substrate 10.
Is formed. The adhesive layer 12 is formed by screen printing, and is formed while maintaining a predetermined printing thickness x with high accuracy. The printing thickness x is set to 20 to 100 μm, preferably 50 μm. As a mesh used for screen printing, a stainless steel printing mesh of 150 to 230 mesh / inch is used.
【００２４】そして、大気圧下において、封止部材１３
の周辺に形成された接着剤層１２上がガラス基板１１上
の有機ＥＬ層１１を囲うように位置決めがなされ、ガラ
ス基板１０及び封止部材１３を接着剤層１２を介して接
着させ、封止部材１３内の封止領域内に有機ＥＬ層１１
を配置させる。上述の説明では、接着剤層１２は封止部
材１３側に形成したが、ガラス基板１０の周辺部に形成
しても良い。At atmospheric pressure, the sealing member 13
Is positioned so that the adhesive layer 12 formed on the periphery of the substrate surrounds the organic EL layer 11 on the glass substrate 11, and the glass substrate 10 and the sealing member 13 are bonded via the adhesive layer 12 to seal The organic EL layer 11 is provided in a sealing region in the member 13.
Is placed. In the above description, the adhesive layer 12 is formed on the sealing member 13 side, but may be formed on the periphery of the glass substrate 10.
【００２５】このような実施形態によると、スクリーン
印刷によって形成された接着剤層１２は高精度に印刷高
さｘを調整できるので、この印刷高さｘを２０〜１００
μｍと低く抑えることで、封止部材１３を載せた際の接
着剤層１２の変位を少なくすることができる。したがっ
て、大気圧下で封止部材１３をガラス基板１０上に接着
した場合にも、封止部材１３による封止領域内の圧力上
昇を最小限に抑えることができる。封止領域の体積にも
よるが、印刷高さｘを８０μｍに設定して、大気圧下の
接着作業を行った場合で、封止領域の内部圧力を１.０
７〜１.１気圧に抑えることができた。According to such an embodiment, the printing height x of the adhesive layer 12 formed by screen printing can be adjusted with high precision.
By suppressing the thickness to as low as μm, the displacement of the adhesive layer 12 when the sealing member 13 is placed can be reduced. Therefore, even when the sealing member 13 is adhered to the glass substrate 10 under the atmospheric pressure, it is possible to minimize the pressure increase in the sealing region by the sealing member 13. Although depending on the volume of the sealing region, the printing height x is set to 80 μm and the bonding operation under the atmospheric pressure is performed, and the internal pressure of the sealing region is set to 1.0.
The pressure was reduced to 7 to 1.1 atm.
【００２６】更に言及すると、スクリーン印刷により接
着剤層１２を形成する場合には、印刷メッシュや乳剤の
種類などの条件を制御することで印刷高さｘを高精度に
設定することが可能になるので、封止領域の体積に応じ
て内部圧力が上昇しない範囲の印刷高さを設定すること
が可能になる。また、金属プレス品による封止部材１３
に接着剤層１２を形成するような場合には、封止部材１
３周辺の限られた箇所に接着剤層１２を形成することが
要求されるが、スクリーン印刷によると、形成箇所を高
精度に特定することが可能であり、少ない接着剤で充分
な封止が得られ、接着剤のはみ出しも生じない。したが
って、ガラス基板１０上に接着剤層１２によるデッドス
ペースが形成されず、パネル面積を表示に有効活用する
ことができる。更には、従来のディスペンサーによる塗
布と比較して、一回に大量の印刷が可能であるから、量
産性も向上する。Further, when the adhesive layer 12 is formed by screen printing, the printing height x can be set with high precision by controlling conditions such as the printing mesh and the type of emulsion. Therefore, it is possible to set the printing height in a range where the internal pressure does not increase according to the volume of the sealing region. In addition, the sealing member 13 made of a metal press product
When the adhesive layer 12 is formed on the sealing member 1,
3 It is required to form the adhesive layer 12 in a limited area around the area. However, according to screen printing, the area to be formed can be specified with high accuracy, and sufficient sealing can be performed with a small amount of adhesive. As a result, the adhesive does not protrude. Therefore, no dead space is formed by the adhesive layer 12 on the glass substrate 10, and the panel area can be effectively used for display. Furthermore, compared to the conventional dispenser application, a large amount of printing can be performed at one time, so that mass productivity is also improved.
【００２７】[0027]
【発明の効果】本発明は上記のように構成されるので、
ガラス基板上に形成された発光層を含む有機ＥＬ層と、
該有機ＥＬ層を覆って封止する封止部材と、該封止部材
を前記ガラス基板に接着する接着剤層とを備えた有機Ｅ
Ｌ表示パネルにおいて、大気圧下で封止作業を行った場
合であっても封止不良が生じることが無く、また、封止
精度向上によって基板上のデッドスペースをより少なく
でき、パネル面積を表示に有効活用することができる。
また、量産性の面でも優れている。Since the present invention is configured as described above,
An organic EL layer including a light emitting layer formed on a glass substrate,
An organic E comprising: a sealing member that covers and seals the organic EL layer; and an adhesive layer that bonds the sealing member to the glass substrate.
In the L display panel, even if the sealing operation is performed under the atmospheric pressure, the sealing failure does not occur, and the dead space on the substrate can be reduced by improving the sealing accuracy, and the panel area can be displayed. Can be used effectively.
It is also excellent in mass productivity.
【図１】本発明の一実施形態に係る有機ＥＬ表示パネル
を示した説明図である。FIG. 1 is an explanatory diagram showing an organic EL display panel according to one embodiment of the present invention.
【図２】実施形態に係る有機ＥＬ表示パネルの製造方法
を説明する説明図である。FIG. 2 is an explanatory diagram illustrating a method for manufacturing an organic EL display panel according to the embodiment.
【図３】従来の封止部材をガラス基板上に接着する工程
について説明する説明図である。FIG. 3 is an explanatory view illustrating a step of bonding a conventional sealing member onto a glass substrate.
【図４】従来の大気圧下で接着作業を行う方法を示す説
明図である。FIG. 4 is an explanatory view showing a conventional method of performing a bonding operation under atmospheric pressure.
１，１０ ガラス基板 ２，１２ 接着剤層 ３，１１ 有機ＥＬ層 ４，１３ 封止部材 ５ 真空封止装置 １４ 乾燥剤 １５ 封止領域 DESCRIPTION OF SYMBOLS 1,10 Glass substrate 2,12 Adhesive layer 3,11 Organic EL layer 4,13 Sealing member 5 Vacuum sealing device 14 Desiccant 15 Sealing area
Claims (4)
有機ＥＬ層と、該有機ＥＬ層を覆って封止する封止部材
と、該封止部材を前記ガラス基板に接着する接着剤層と
を備えた有機ＥＬ表示パネルにおいて、 前記接着剤層は、設定高さの薄層を前記有機ＥＬ層の全
周を囲うように形成してなり、前記封止部材による封止
領域内を１気圧以上１.２気圧未満の圧力状態としたこ
とを特徴とする有機ＥＬ表示パネル。1. An organic EL layer including a light emitting layer formed on a glass substrate, a sealing member for covering and sealing the organic EL layer, and an adhesive layer for bonding the sealing member to the glass substrate. In the organic EL display panel, the adhesive layer is formed by forming a thin layer of a set height so as to surround the entire periphery of the organic EL layer, and the inside of the sealing region by the sealing member is 1 mm. An organic EL display panel characterized by being in a pressure state of not less than atmospheric pressure and less than 1.2 atmospheric pressure.
を蒸着する工程と、該有機ＥＬ層を封止する封止工程と
を含む有機ＥＬ表示パネルの製造方法であって、 前記封止工程は、前記有機ＥＬ層の全周を囲う接着剤層
をスクリーン印刷によって形成する工程と、大気圧下で
前記接着剤層を介して前記ガラス基板と封止部材を接着
させる工程とからなることを特徴とする有機ＥＬ表示パ
ネルの製造方法。2. A method for manufacturing an organic EL display panel, comprising: a step of depositing an organic EL layer including a light emitting layer on a glass substrate; and a sealing step of sealing the organic EL layer. The step includes a step of forming an adhesive layer surrounding the entire periphery of the organic EL layer by screen printing, and a step of bonding the glass substrate and a sealing member via the adhesive layer under atmospheric pressure. A method for manufacturing an organic EL display panel, comprising:
μｍとすることを特徴とする請求項２記載の有機ＥＬ表
示パネルの製造方法。3. The printing height of the adhesive layer is 20 to 100.
3. The method for manufacturing an organic EL display panel according to claim 2, wherein the thickness is set to μm.
ッシュ／インチのステンレス製印刷メッシュを用いたス
クリーン印刷により行うことを特徴とする請求項２記載
の有機ＥＬ表示パネルの製造方法。4. The method for manufacturing an organic EL display panel according to claim 2, wherein the formation of the adhesive layer is performed by screen printing using a stainless steel printing mesh of 150 to 230 mesh / inch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001155202A JP2002352952A (en) | 2001-05-24 | 2001-05-24 | Organic el display panel and manufacturing method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001155202A JP2002352952A (en) | 2001-05-24 | 2001-05-24 | Organic el display panel and manufacturing method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002352952A true JP2002352952A (en) | 2002-12-06 |
Family
ID=18999437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001155202A Pending JP2002352952A (en) | 2001-05-24 | 2001-05-24 | Organic el display panel and manufacturing method therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002352952A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100626004B1 (en) | 2004-06-03 | 2006-09-20 | 삼성에스디아이 주식회사 | Flat panel display device and method of manufacturing the same |
| JP2009205911A (en) * | 2008-02-27 | 2009-09-10 | Rohm Co Ltd | Light emitting apparatus and method for manufacturing light emitting apparatus |
| WO2024004124A1 (en) * | 2022-06-30 | 2024-01-04 | シャープディスプレイテクノロジー株式会社 | Light-emitting device and manufacturing method therefor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10189238A (en) * | 1996-12-27 | 1998-07-21 | Sony Corp | Optical element and manufacture thereof |
| JPH11121165A (en) * | 1997-10-17 | 1999-04-30 | Chisso Corp | Organic electrouminescent element |
| JPH11312580A (en) * | 1998-04-28 | 1999-11-09 | Toyota Central Res & Dev Lab Inc | Organic electroluminescent element |
| JPH11339954A (en) * | 1998-05-29 | 1999-12-10 | Toyota Motor Corp | Organic el display device |
| JP2000243555A (en) * | 1999-02-17 | 2000-09-08 | Toyota Motor Corp | Organic el display |
-
2001
- 2001-05-24 JP JP2001155202A patent/JP2002352952A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10189238A (en) * | 1996-12-27 | 1998-07-21 | Sony Corp | Optical element and manufacture thereof |
| JPH11121165A (en) * | 1997-10-17 | 1999-04-30 | Chisso Corp | Organic electrouminescent element |
| JPH11312580A (en) * | 1998-04-28 | 1999-11-09 | Toyota Central Res & Dev Lab Inc | Organic electroluminescent element |
| JPH11339954A (en) * | 1998-05-29 | 1999-12-10 | Toyota Motor Corp | Organic el display device |
| JP2000243555A (en) * | 1999-02-17 | 2000-09-08 | Toyota Motor Corp | Organic el display |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100626004B1 (en) | 2004-06-03 | 2006-09-20 | 삼성에스디아이 주식회사 | Flat panel display device and method of manufacturing the same |
| JP2009205911A (en) * | 2008-02-27 | 2009-09-10 | Rohm Co Ltd | Light emitting apparatus and method for manufacturing light emitting apparatus |
| WO2024004124A1 (en) * | 2022-06-30 | 2024-01-04 | シャープディスプレイテクノロジー株式会社 | Light-emitting device and manufacturing method therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101633118B1 (en) | SEALING METHOD of OLED | |
| US7477015B2 (en) | Sealing glass substrate for organic EL material and method of manufacturing organic EL display | |
| US20040169174A1 (en) | Container for encapsulating oled and manufacturing method thereof | |
| US7476138B2 (en) | Method of manufacturing organic EL displays incorporating adhesion escape grooves surrounding an adhesion region of each display | |
| TWI451610B (en) | Mother substrate structure of light emitting devices and light emitting device and method of fabricating the same | |
| WO2016086535A1 (en) | Oled packaging structure and packaging method therefor | |
| KR100689199B1 (en) | Encapsulation method of organic light emitting diodes and apparatus of the same | |
| US20070057295A1 (en) | Substrate bonding method and apparatus | |
| JPWO2008102694A1 (en) | Display device, display device manufacturing apparatus, and display device manufacturing method | |
| JP2001189191A (en) | Sealing plate for organic el display element and sealing method | |
| JP4731902B2 (en) | Method for manufacturing self-luminous panel | |
| JP4101547B2 (en) | Manufacturing method of organic EL display and substrate for organic EL display | |
| JP2002352951A (en) | Organic el display panel and manufacturing method therefor | |
| JP2002352952A (en) | Organic el display panel and manufacturing method therefor | |
| JP2007035514A (en) | Sealing method and sealing device of organic el element | |
| JP2010020973A (en) | Manufacturing method of organic el display device | |
| JP2006228540A (en) | Mask, manufacturing method of the mask, and manufacturing method of organic el device | |
| JP2007080711A (en) | Sealing method of organic el element | |
| JP2006106036A (en) | Method for manufacturing panel | |
| JP2008066026A (en) | Method for manufacturing organic el display panel | |
| KR100786828B1 (en) | Flat panel display device and manufacturing method of the same | |
| JP2006004707A (en) | Sealing device, sealing method, organic el device and electronic apparatus | |
| WO2018133143A1 (en) | Oled packaging method | |
| CN114709354B (en) | Laser micro-nano structure and packaging method of OLED device | |
| JP2002008855A (en) | Organic el panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080306 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20100713 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20100729 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20100924 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20110222 |