JP2006272283A - Organic el panel - Google Patents

Organic el panel Download PDF

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JP2006272283A
JP2006272283A JP2005099568A JP2005099568A JP2006272283A JP 2006272283 A JP2006272283 A JP 2006272283A JP 2005099568 A JP2005099568 A JP 2005099568A JP 2005099568 A JP2005099568 A JP 2005099568A JP 2006272283 A JP2006272283 A JP 2006272283A
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hygroscopic
organic
resin fine
fine particles
panel
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JP3879933B2 (en
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Yotaro Shiraishi
洋太郎 白石
Takashi Ikeda
貴 池田
Tomohiro Ono
智宏 小野
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Nippon Seiki Co Ltd
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Nippon Seiki Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a hygroscopic member which has a flowability required for a forming process of the hygroscopic member, and enables a suppression of a flowage after forming the hygroscopic member or an occurrence of a dripping portion, and an organic EL panel. <P>SOLUTION: The hygroscopic member 8 comprises a hygroscopic element 8 consisting of at least a hygroscopic granulated material, a binder 8b which is an inactive liquid holding the hygroscopic element 8 on a surface of a sealing member 7, and a resin fine particle 8c. The organic EL panel 1 provides the hygroscopic member 8 on the sealing member 7 covering an organic layer 5 formed on a glass substrate 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、吸湿部材およびこのような吸湿部材を備えた有機ＥＬパネルに関するものである。   The present invention relates to a moisture absorbing member and an organic EL panel provided with such a moisture absorbing member.

有機ＥＬパネルとしては、ガラス材料からなるガラス基板（透光性の支持基板）上に、ＩＴＯ（Ｉｎｄｉｕｍ Ｔｉｎ Ｏｘｉｄｅ）等によって陽極となる透明電極と、正孔注入層，正孔輸送層，発光層及び電子輸送層からなる有機層と、陰極となるアルミニウム（Ａｌ）等の非透光性の背面電極とを順次積層して積層体である有機ＥＬ素子を形成し、この積層体を覆うガラス材料からなる凹部形状の封止部材を前記ガラス基板上に紫外線硬化性接着剤（光硬化性接着剤）を介して気密的に設けるとともに、前記ガラス基板と前記封止部材とで得られる気密空間内に吸湿部材を設けるものが知られており、例えば特許文献１に開示されている。   As an organic EL panel, on a glass substrate (translucent support substrate) made of a glass material, a transparent electrode that becomes an anode by ITO (Indium Tin Oxide), a hole injection layer, a hole transport layer, a light emitting layer And an organic layer composed of an electron transport layer and a non-translucent back electrode such as aluminum (Al) serving as a cathode are sequentially laminated to form an organic EL element as a laminate, and a glass material covering the laminate A recess-shaped sealing member made of is hermetically provided on the glass substrate via an ultraviolet curable adhesive (photo-curable adhesive), and in an airtight space obtained by the glass substrate and the sealing member There is known one provided with a hygroscopic member, for example, disclosed in Patent Document 1.

また、本願出願人は、粘性を有する吸湿部材を前記封止部材の前記有機ＥＬ素子との対向面に設ける構造を特許文献２にて提案している。かかる有機ＥＬパネルは、前記封止部材の前記有機ＥＬ素子との対向面に、吸湿粉粒体と不活性液体との混合物からなるクリーム状の吸湿部材を膜状に形成するとともに、この吸湿部材が形成された封止部材を前記支持基板上に紫外線硬化性接着剤を介して気密封止するものであり、ダークスポットの発生や両電極間の短絡を防止できるとともに、前記吸湿部材の配設工程を含む封止工程を簡素化し、生産性を向上させることが可能となるものである。
特開２００１−２６７０６６号公報 特開２００２−１９８１７０号公報 The applicant of the present application has proposed a structure in which a moisture absorbing member having viscosity is provided on a surface of the sealing member facing the organic EL element in Patent Document 2. In such an organic EL panel, a cream-like moisture absorbing member made of a mixture of moisture-absorbing powder particles and an inert liquid is formed in a film shape on the surface of the sealing member facing the organic EL element. Is formed on the support substrate through an ultraviolet curable adhesive, and it is possible to prevent the occurrence of dark spots and a short circuit between both electrodes, and to dispose the moisture absorbing member. It is possible to simplify the sealing process including the process and improve productivity.
JP 2001-267066 A JP 2002-198170 A

上述したようなクリーム状の吸湿部材を設けてなる有機ＥＬパネルは、吸湿作用として十分な機能を発揮できるものの、例えば、スピードメータやエンジン回転計等の車両用表示装置として用いられる場合、所定の取り付け角度をもって前記車両用表示装置のケース体に収納され、この車両用表示装置が使用される環境としては、車両の走行による振動を受けたり、高温（例えば、８５℃程度）に達することがある。   Although the organic EL panel provided with the cream-like moisture absorbing member as described above can exhibit a sufficient function as a moisture absorbing action, for example, when used as a vehicle display device such as a speedometer or an engine tachometer, The vehicle is housed in the case body of the vehicle display device with an attachment angle, and the environment in which the vehicle display device is used may be subject to vibrations due to running of the vehicle or reach a high temperature (for example, about 85 ° C.). .

このような環境で使用される有機ＥＬパネルにおいて、前記封止部材に設ける前記吸湿部材は、その一部を構成する前記不活性液体にフッ素系のオイルやグリースなどを採用しており、これらは温度上昇にともない、粘度が下がるものであり、この温度上昇にともなう粘度低下によって、前記吸湿部材が流動したり、あるいは、前記吸湿粉粒体と前記不活性液体とが分離しその混合状態が不均一になり、前記車両用表示装置への取り付け角度に伴って、傾斜する有機ＥＬパネルの下端側に前記不活性液体の一部分が流動し部分的に厚くなってしまう現象が生じる（以下、液だれ部と記す）。   In the organic EL panel used in such an environment, the moisture absorbing member provided in the sealing member employs fluorine-based oil or grease as the inert liquid constituting a part thereof, As the temperature rises, the viscosity decreases, and due to the decrease in viscosity accompanying this temperature increase, the hygroscopic member flows, or the hygroscopic powder particles and the inert liquid are separated and the mixed state is not good. A phenomenon occurs in which a part of the inert liquid flows and partially thickens on the lower end side of the inclined organic EL panel with an angle of attachment to the vehicle display device (hereinafter referred to as liquid dripping). Part).

そのため、特に前記有機ＥＬパネルを小型化した場合など、前記有機ＥＬ素子と前記吸湿部材とのクリアランスが小さくなると、前記液だれ部が前記有機ＥＬ素子と干渉し、振動等の影響によって特に背面電極側に損傷を与え、ダークスポットの発生や両電極間の短絡等の原因となり、有機ＥＬパネルとしての寿命を短くしてしまうといった問題が生じてしまう。   Therefore, particularly when the organic EL panel is downsized, when the clearance between the organic EL element and the hygroscopic member becomes small, the dripping portion interferes with the organic EL element, and the back electrode is particularly affected by the influence of vibration or the like. This causes damage to the side, causing dark spots, short-circuiting between both electrodes, and the like, resulting in a problem of shortening the lifetime of the organic EL panel.

また、流動や液だれ部が発生しないように、吸湿部材の粘度を高くすることも考えられるが、粘度を高くすると、吸湿部材の流動性が低下して吸湿部材を形成する（混合、充填、塗布などの）工程での生産性の低下を招くという問題があった。したがって、この問題を解決する吸湿部材および有機ＥＬパネルが望まれていた。   In addition, it is conceivable to increase the viscosity of the hygroscopic member so that no flow or dripping occurs, but if the viscosity is increased, the fluidity of the hygroscopic member decreases to form the hygroscopic member (mixing, filling, There has been a problem in that productivity in the process (such as coating) is reduced. Therefore, a moisture absorbing member and an organic EL panel that solve this problem have been desired.

そこで、本発明の目的とするところは、上述した問題に着目してなされたものであり、吸湿部材の形成工程に必要な流動性を備え、かつ吸湿部材の形成後の流動や液だれ部の発生を抑制することが可能な吸湿部材および有機ＥＬパネルを提供することにある。   Therefore, the object of the present invention is made by paying attention to the above-mentioned problems, and has the fluidity necessary for the formation process of the hygroscopic member, and the flow and dripping portion after the formation of the hygroscopic member. An object of the present invention is to provide a hygroscopic member and an organic EL panel capable of suppressing generation.

本発明の吸湿部材は、少なくとも吸湿粉粒体からなる吸湿体と、前記吸湿体を前記封止部材の面上に保持する不活性液体からなるバインダと、樹脂微粒子とからなるものである。   The hygroscopic member of the present invention comprises at least a hygroscopic body composed of hygroscopic powder particles, a binder composed of an inert liquid that holds the hygroscopic body on the surface of the sealing member, and resin fine particles.

また、有機ＥＬパネルは、少なくとも発光層を有する有機層を陽極と陰極とで狭持した有機ＥＬ素子を透光性の支持基板上に形成し、前記有機層を覆うように封止部材を前記支持基板上に設け、少なくとも吸湿粉粒体からなる吸湿体と、前記吸湿体を保持する不活性液体からなるバインダと、樹脂微粒子とからなる吸湿部材を前記封止部材に設けたものである。   The organic EL panel includes an organic EL element having an organic layer having at least a light emitting layer sandwiched between an anode and a cathode on a translucent support substrate, and the sealing member is disposed so as to cover the organic layer. Provided on the support substrate is a hygroscopic member made of at least a hygroscopic powder particle, a binder made of an inert liquid that holds the hygroscopic member, and a hygroscopic member made of resin fine particles.

また、前記樹脂微粒子が、耐熱温度１２０℃以上で含水率１％以下で平均粒径４０μｍ以下のものである。   Further, the resin fine particles have a heat resistance temperature of 120 ° C. or higher, a water content of 1% or less, and an average particle size of 40 μm or less.

また、前記樹脂微粒子を０．３〜５ｗｔ％含むものである。   The resin fine particles contain 0.3 to 5 wt%.

本発明は、吸湿部材の形成工程に必要な流動性を備え、かつ吸湿部材の形成後の流動や液だれ部の発生を抑制することが可能な吸湿部材を提供することができる。   The present invention can provide a hygroscopic member that has fluidity necessary for the process of forming the hygroscopic member, and that can suppress the flow after the formation of the hygroscopic member and the occurrence of a dripping portion.

以下、添付図面に基づいて本発明の実施形態を説明する。   Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

図１および図２において、有機ＥＬパネル１は、ガラス基板（支持基板）２と、透明電極（陽極）３と、絶縁層４と、有機層５と、背面電極（陰極）６と、封止部材７と、吸湿部材８とから主に構成されている。   1 and 2, an organic EL panel 1 includes a glass substrate (support substrate) 2, a transparent electrode (anode) 3, an insulating layer 4, an organic layer 5, a back electrode (cathode) 6, and a sealing It is mainly composed of the member 7 and the hygroscopic member 8.

ガラス基板２は、長方形形状からなる透光性の支持基板である。   The glass substrate 2 is a translucent support substrate having a rectangular shape.

透明電極３は、ガラス基板２上にＩＴＯ等の導電性材料を蒸着法やスパッタリング法等の手段によって形成されるもので、日の字型の表示セグメント部３ａと、個々のセグメントからそれぞれ引き出し形成されたリード部３ｂと、リード部３ｂの終端部に設けられる電極部３ｃとを備えている。なお、電極部３ｃは、ガラス基板２の一辺に集中的に設けている。   The transparent electrode 3 is formed of a conductive material such as ITO on the glass substrate 2 by means such as vapor deposition or sputtering, and is formed by pulling out from the Japanese-shaped display segment portion 3a and each segment. And the electrode part 3c provided at the terminal part of the lead part 3b. In addition, the electrode part 3c is concentrated on one side of the glass substrate 2.

絶縁層４は、例えば、ポリイミド系等の絶縁材料からなり、例えばフォトリソグラフィー法等の手段によって形成される。絶縁層４は、表示セグメント部３ａに対応した窓部４ａと、背面電極６の後述する電極部に対応する切り欠き部４ｂとを有し、発光領域の輪郭を鮮明に表示するため、透明電極３の表示セグメント部３ａの周縁部と若干重なるように窓部４ａが形成され、また、透明電極３と背面電極６との絶縁を確保するためにリード部３ｂ上を覆うように設けられる。   The insulating layer 4 is made of, for example, a polyimide-based insulating material, and is formed by means such as photolithography. The insulating layer 4 has a window portion 4a corresponding to the display segment portion 3a and a notch portion 4b corresponding to an electrode portion to be described later of the back electrode 6, and a transparent electrode for clearly displaying the outline of the light emitting region. A window portion 4a is formed so as to slightly overlap the peripheral edge portion of the display segment portion 3a, and is provided so as to cover the lead portion 3b in order to ensure insulation between the transparent electrode 3 and the back electrode 6.

有機層５は、少なくとも発光層を有するものであれば良いが、本発明の実施形態においては正孔注入層，正孔輸送層，発光層及び電子輸送層を蒸着法やスパッタリング法等の手段によって順次積層形成してなるものである。有機層５は、絶縁層４における窓部４ａの形成箇所に対応するように所定の大きさをもって設けられる。   The organic layer 5 may have at least a light emitting layer, but in the embodiment of the present invention, the hole injection layer, the hole transport layer, the light emitting layer, and the electron transport layer are formed by means such as vapor deposition or sputtering. It is formed by sequentially laminating. The organic layer 5 is provided with a predetermined size so as to correspond to the place where the window portion 4 a is formed in the insulating layer 4.

背面電極６は、アルミ（Ａｌ）やアルミリチウム（Ａｌ：Ｌｉ），マグネシウム銀（Ｍｇ：Ａｇ）等の金属性の導電性材料を蒸着法やスパッタリング法等の手段によって形成されるものであり、有機層６上に設けられる。背面電極６は、透明電極３における各電極部３ｃと隣接するようにガラス基板２の一辺に設けられるリード部６ａと電気的に接続される。なお、リード部６ａの終端部には、電極部６ｂが設けられ、リード部６ａ及び電極部６ｂは透明電極３と同材料により形成される。   The back electrode 6 is formed of a metal conductive material such as aluminum (Al), aluminum lithium (Al: Li), or magnesium silver (Mg: Ag) by means such as vapor deposition or sputtering, Provided on the organic layer 6. The back electrode 6 is electrically connected to a lead portion 6 a provided on one side of the glass substrate 2 so as to be adjacent to each electrode portion 3 c in the transparent electrode 3. In addition, the electrode part 6b is provided in the terminal part of the lead part 6a, and the lead part 6a and the electrode part 6b are formed of the same material as the transparent electrode 3.

以上のように、ガラス基板２上に透明電極３と絶縁層４と有機層５と背面電極６とを順次積層し積層体を形成することで有機ＥＬ素子９が得られる。   As described above, the organic EL element 9 is obtained by sequentially laminating the transparent electrode 3, the insulating layer 4, the organic layer 5, and the back electrode 6 on the glass substrate 2 to form a laminate.

封止部材７は、例えばガラス材料からなる平板部材に凹部７ａを形成してなるものである。封止部材７は、凹部７ａを取り囲むように形成される支持部７ｂを、例えば紫外線硬化性エポキシ樹脂の接着剤１０を介しガラス基板２上に気密的に設けることで、封止部材７とガラス基板２とで有機ＥＬ素子９の有機層５を収納する気密空間１１を構成する。封止部材７は、透明電極３の電極部３ｃ及び背面電極６の電極部６ｂが外部に露出するようにガラス基板２よりも若干小さめに構成されている。   The sealing member 7 is formed by forming a recess 7a in a flat plate member made of, for example, a glass material. The sealing member 7 and the glass 7 are formed by airtightly providing a supporting portion 7b formed so as to surround the concave portion 7a on the glass substrate 2 with an adhesive 10 of an ultraviolet curable epoxy resin, for example. An airtight space 11 for accommodating the organic layer 5 of the organic EL element 9 is formed with the substrate 2. The sealing member 7 is configured to be slightly smaller than the glass substrate 2 so that the electrode portion 3c of the transparent electrode 3 and the electrode portion 6b of the back electrode 6 are exposed to the outside.

吸湿部材８は、有機ＥＬ素子９に当接しないように所定の膜厚（例えば、１ｍｍ）によって、封止部材７の有機ＥＬ素子９との対向面、即ち封止部材７の凹部７ａの底面に膜状に設けられる。本発明の有機ＥＬパネルにおける吸湿部材８は、吸湿体８ａと、バインダ８ｂと、樹脂微粒子８ｃとから構成される。   The moisture absorbing member 8 has a predetermined film thickness (for example, 1 mm) so as not to contact the organic EL element 9, the surface of the sealing member 7 facing the organic EL element 9, that is, the bottom surface of the recess 7 a of the sealing member 7. It is provided in the form of a film. The hygroscopic member 8 in the organic EL panel of the present invention includes a hygroscopic body 8a, a binder 8b, and resin fine particles 8c.

吸湿体８ａは、活性アルミナ、モレキュラシーブス、酸化カルシウム、ゼオライトまたはシリカゲル等の物理的あるいは化学的に水分を吸湿する１０μｍ以下の吸湿粉粒体（乾燥剤）からなる。なお、吸湿体８ａは、腐食性や潮解性がなく、低湿度下であっても優れた吸湿能力を持っているものが好ましく、他にも、クレイ系乾燥剤、アロフェン、酸化バリウムや酸化ストロンチウムのようなアルカリ金属あるいはアルカリ土類金属の酸化物なども使用できる。また、吸湿体８ａとして、これらの材質を単独または併用して使用することができる。   The hygroscopic body 8a is composed of a hygroscopic powder particle (drying agent) of 10 μm or less that physically or chemically absorbs moisture, such as activated alumina, molecular sieves, calcium oxide, zeolite, or silica gel. The hygroscopic body 8a preferably has no corrosiveness or deliquescence and has an excellent hygroscopic ability even under low humidity. In addition, a clay-type desiccant, allophane, barium oxide or strontium oxide is preferable. Alkali metal or alkaline earth metal oxides can also be used. Moreover, these materials can be used individually or in combination as the hygroscopic body 8a.

バインダ８ｂは、フッ素系オイル、フッ素系グリース、シリコン系オイルまたはシリコン系グリースなどの不活性液体からなる。   The binder 8b is made of an inert liquid such as fluorine-based oil, fluorine-based grease, silicon-based oil, or silicon-based grease.

樹脂微粒子８ｃは、本実施形態では、耐熱温度が１５０℃以上で、含水率０．５％以下のシリコーンゴムからなり、その平均粒径が５μｍ程度の球体である。また、その表面にシリコーン樹脂被膜を備えている。例えば、信越化学工業株式会社製シリコーン複合パウダーＫＭＰシリーズで、耐熱温度が３００℃以上、含水率０．１％のもので、平均粒径が５〜３０μｍ程度のものを選択して使用する。   In the present embodiment, the resin fine particles 8c are formed of a silicone rubber having a heat resistant temperature of 150 ° C. or higher and a water content of 0.5% or less, and has an average particle diameter of about 5 μm. Moreover, the surface is equipped with the silicone resin film. For example, a silicone composite powder KMP series manufactured by Shin-Etsu Chemical Co., Ltd., having a heat resistant temperature of 300 ° C. or higher, a moisture content of 0.1%, and an average particle size of about 5 to 30 μm is selected and used.

また、吸湿部材８に対して、本実施形態では、樹脂微粒子８ｃを２ｗｔ％添加してある。   Further, in this embodiment, 2 wt% of resin fine particles 8c are added to the hygroscopic member 8.

以上の各部によって有機ＥＬパネル１が構成される。   The organic EL panel 1 is configured by the above-described units.

次に、図３〜図５を用いて有機ＥＬパネルの製造方法を説明するが、支持基板２への積層体の形成工程は一般的な蒸着工程であるため詳細な説明は省略するものとする。   Next, although the manufacturing method of an organic electroluminescent panel is demonstrated using FIGS. 3-5, since the formation process of the laminated body to the support substrate 2 is a general vapor deposition process, detailed description shall be abbreviate | omitted. .

先ず、例えばフッ素系オイルからなる不活性液体であるバインダ８ｂ中に所定量の吸湿体８ａと樹脂微粒子８ｃを混合することで、吸湿体８ａと樹脂微粒子８ｃとを含有する粘性を有するクリーム状の吸湿部材８を得る（混合工程１２）。このとき、吸湿部材８の材料は、生産性を確保するために、吸湿体８ａ、バインダ８ｂ及び樹脂微粒子８ｃを数十度程度まで加熱して流動性を確保している。   First, for example, by mixing a predetermined amount of the hygroscopic body 8a and the resin fine particles 8c in a binder 8b which is an inert liquid made of fluorine-based oil, a cream-like cream containing the hygroscopic body 8a and the resin fine particles 8c is contained. The hygroscopic member 8 is obtained (mixing step 12). At this time, the material of the hygroscopic member 8 ensures fluidity by heating the hygroscopic body 8a, the binder 8b, and the resin fine particles 8c to several tens of degrees in order to ensure productivity.

次に、吸湿部材８を塗布するための後述する塗布装置に配設される図示しないシリンジ内に混合工程１２によって得られた吸湿部材８を充填する（充填工程１３）。   Next, the hygroscopic member 8 obtained by the mixing step 12 is filled in a syringe (not shown) disposed in a coating apparatus to be described later for applying the hygroscopic member 8 (filling step 13).

そして、混合工程１２及び充填工程１３によって吸湿部材８中に生成される（混入する）気泡を脱泡するために、吸湿部材８が充填された前記シリンジを真空引きするとともに、前記シリンジに対して振動を与えることにより前記気泡を脱泡する（脱泡工程（振動付与工程）１４）。   And in order to degas the bubble produced | generated (mixed) in the moisture absorption member 8 by the mixing process 12 and the filling process 13, while vacuum-evacuating the said syringe with which the moisture absorption member 8 was filled, with respect to the said syringe The bubbles are defoamed by applying vibration (defoaming step (vibration applying step) 14).

以上の各工程によって吸湿部材８が生成される。なお、前記フッ素系オイルを用いて吸湿部材８をクリーム状に構成する場合は、前記フッ素系オイル、吸湿体８ａ及び樹脂微粒子８ｃとを所定の比率で混合することで、流動しにくいクリーム状の吸湿部材８が得られる。   The hygroscopic member 8 is generated by the above steps. When the moisture absorbing member 8 is configured in a cream shape using the fluorinated oil, the fluorinated oil, the moisture absorbing body 8a, and the resin fine particles 8c are mixed at a predetermined ratio, so that it does not flow easily. The hygroscopic member 8 is obtained.

次に、脱泡工程１４によって得られたクリーム状の吸湿部材８を封止部材７における有機ＥＬ素子９との対向面（凹部７ａの底面）に塗布する塗布工程１５について、図４及び図５を用いて詳述する。図４は、封止部材７における有機ＥＬ素子９との対向面に吸湿部材８を塗布するための塗布装置を示すものである。   Next, an application step 15 for applying the cream-like moisture absorbing member 8 obtained in the defoaming step 14 to the surface of the sealing member 7 facing the organic EL element 9 (the bottom surface of the recess 7a) will be described with reference to FIGS. Will be described in detail. FIG. 4 shows a coating apparatus for coating the moisture absorbing member 8 on the surface of the sealing member 7 facing the organic EL element 9.

塗布装置２０は、脱泡工程１４によって得られた吸湿部材８を所定量吐出するためのディスペンサ２１を備えるとともに、このディスペンサ２１には、吸湿部材８を吐出する後述する吐出口を備えたニードル２２を備えている。また、ディスペンサ２１は、アクチュエータやサーボモータ等から構成されるＸ−Ｙ−Ｚ移動手段によって横（Ｘ），縦（Ｙ）及び高さ（Ｚ）方向に移動できるように構成されている。なお、塗布装置２０は、真空引きされ、且つ窒素雰囲気中となる吸湿部材塗布室内に配設される。   The coating device 20 includes a dispenser 21 for discharging a predetermined amount of the hygroscopic member 8 obtained by the defoaming step 14, and the dispenser 21 includes a needle 22 having a discharge port to be described later for discharging the hygroscopic member 8. It has. The dispenser 21 is configured to be movable in the horizontal (X), vertical (Y), and height (Z) directions by XYZ moving means including an actuator, a servo motor, and the like. In addition, the coating device 20 is arrange | positioned in the moisture absorption member application | coating chamber which is evacuated and becomes nitrogen atmosphere.

図５は、封止部材７の凹部７ａの底面に塗布装置２０を用いて脱泡工程１４によって得られた吸湿部材８を塗布する状態を示すものである。塗布装置２０のディスペンサ２１に設けられたニードル２２には、封止部材７の凹部７ａの底面（平面）に対応した平坦面２２ａを有し、この平坦面２２ａの略中央には吸湿部材８を吐出する吐出口２２ｂを備えている。ディスペンサ２１は、前記Ｘ−Ｙ−Ｚ移動手段によって、まず凹部７ａの底面にディスペンサ２１を下降させて、ニードル２２の平坦面２２ａと凹部７ａの底面との距離が０．５ｍｍになるようにニードル２２を前記底面に近接配置させる。次に、吐出口２２ｂから脱泡工程１４によって得られた吸湿部材８を吐出させ平坦面２２ａと前記底面との隙間Ｓに流し込むとともに、前記Ｘ−Ｙ−Ｚ移動手段によって、前記ニードルを前記底面に対してＸ方向に終点まで平行移動させることで吸湿部材８が前記底面に塗布される（吸湿部材塗布工程１５）。   FIG. 5 shows a state in which the moisture absorbing member 8 obtained by the defoaming step 14 is applied to the bottom surface of the recess 7 a of the sealing member 7 using the coating device 20. The needle 22 provided in the dispenser 21 of the coating apparatus 20 has a flat surface 22a corresponding to the bottom surface (plane) of the concave portion 7a of the sealing member 7, and the moisture absorbing member 8 is provided at substantially the center of the flat surface 22a. A discharge port 22b for discharging is provided. The dispenser 21 first lowers the dispenser 21 to the bottom surface of the recess 7a by the XYZ moving means so that the distance between the flat surface 22a of the needle 22 and the bottom surface of the recess 7a becomes 0.5 mm. 22 is placed close to the bottom surface. Next, the moisture absorbing member 8 obtained by the defoaming step 14 is discharged from the discharge port 22b and poured into the gap S between the flat surface 22a and the bottom surface, and the needle is moved to the bottom surface by the XYZ moving means. In contrast, the moisture absorbing member 8 is applied to the bottom surface by moving in parallel in the X direction to the end point (moisture absorbing member application step 15).

そして、吸湿部材塗布工程１５後に減圧された窒素雰囲気中の室内において、脱泡工程１４によって得られた吸湿部材８が凹部７ａの底面に塗布されるとともに、接着剤１０が支持部７ｂに塗布された封止部材７と支持基板２とを重ね合わせ装置（図示せず）によって平行状態を保ちながら、且つ凹部７ａが有機ＥＬ素子９に対応するように重ね合わされるとともに、減圧室内において封止部材７側もしくは支持基板２側から所定の圧力を付与した状態にて、紫外線を照射することにより封止部材７と支持基板２とを接合する（接合工程１６）。これにより封止部材７と支持基板２によって構成される気密空間１１内に有機ＥＬ素子９が得られる構造となる。   The moisture absorbing member 8 obtained by the defoaming step 14 is applied to the bottom surface of the recess 7a and the adhesive 10 is applied to the support portion 7b in a room in a nitrogen atmosphere that has been decompressed after the moisture absorbing member application step 15. The sealing member 7 and the supporting substrate 2 are overlapped so that the concave portion 7a corresponds to the organic EL element 9 while maintaining a parallel state by an overlapping device (not shown), and the sealing member is disposed in the decompression chamber. In a state where a predetermined pressure is applied from the 7 side or the support substrate 2 side, the sealing member 7 and the support substrate 2 are bonded by irradiating ultraviolet rays (bonding step 16). Thereby, the organic EL element 9 is obtained in the airtight space 11 constituted by the sealing member 7 and the support substrate 2.

また本実施形態では、封止部材７がガラス材料からなる例について説明したが、例えば封止部材７は金属材料によって形成してもよい。但し、この場合は、リード部３ｂ，６ａの金属封止部材によるショートを防止するため、接着剤中に絶縁材（樹脂、ガラス材料）からなるボール状、円柱状のスペーサを含有する必要がある。   Moreover, although this embodiment demonstrated the example which the sealing member 7 consists of glass materials, you may form the sealing member 7 with a metal material, for example. However, in this case, in order to prevent the lead portions 3b and 6a from being short-circuited by the metal sealing member, it is necessary to include ball-shaped or columnar spacers made of an insulating material (resin or glass material) in the adhesive. .

また本実施形態では、封止部材７は凹部７ａと支持部７ｂとが一体に形成された構造であったが、本発明に適用される封止部材７はこれに限定されるものではなく、例えば平板部材と支持部となるスペーサによって封止部材７を構成するものであってもよい。   In the present embodiment, the sealing member 7 has a structure in which the concave portion 7a and the support portion 7b are integrally formed. However, the sealing member 7 applied to the present invention is not limited to this, For example, the sealing member 7 may be configured by a flat plate member and a spacer serving as a support portion.

かかる有機ＥＬパネル１は、少なくとも発光層を有する有機層５を陽極である透明電極３と陰極である背面電極６とで狭持した有機ＥＬ素子９を透光性の支持基板であるガラス基板２上に形成し、有機層５を覆うように封止部材７をガラス基板２上に設けてなる有機ＥＬパネル１であって、吸湿粉粒体からなる吸湿体８と、吸湿体８を封止部材７の面上に保持する不活性液体からなるバインダ８ｂと、樹脂微粒子８ｃと、を混合してなる吸湿部材８を封止部材７における有機ＥＬ素子９との対向面に設けたものである。   Such an organic EL panel 1 includes a glass substrate 2 as a translucent support substrate having an organic EL element 9 having at least an organic layer 5 having a light emitting layer sandwiched between a transparent electrode 3 as an anode and a back electrode 6 as a cathode. The organic EL panel 1 is formed on the glass substrate 2 so as to cover the organic layer 5, and the hygroscopic body 8 made of hygroscopic powder particles and the hygroscopic body 8 are sealed. A moisture absorbing member 8 formed by mixing a binder 8b made of an inert liquid held on the surface of the member 7 and resin fine particles 8c is provided on the surface of the sealing member 7 facing the organic EL element 9. .

したがって、例えば、特に吸湿部材塗布工程１５で、ニードル２２内を吸湿部材８が通るときに、樹脂微粒子８ｃが潤滑剤として機能し、吸湿部材８の粘度を低下させることなく、吸湿部材８の塗布工程１５に必要な流動性を得ることができる。なお、流動性が必要な工程は、塗布工程１５のみではなく、混合工程１２などの他の吸湿部材８の形成工程にも必要である。   Therefore, for example, when the hygroscopic member 8 passes through the needle 22, particularly in the hygroscopic member application step 15, the resin fine particles 8 c function as a lubricant, and the hygroscopic member 8 is applied without reducing the viscosity of the hygroscopic member 8. The fluidity required for step 15 can be obtained. In addition, the process requiring fluidity is necessary not only in the coating process 15 but also in the other moisture absorbing member 8 forming process such as the mixing process 12.

また、樹脂微粒子８ｃは、バインダ８ｂと親和性があることで、バインダ８ｂ中への良好に分散することできる。また、樹脂微粒子８ｃは、吸湿部材８ａとも親和性があるので、樹脂微粒子８ｃが間に入って吸湿体８ａとバインダ８ｂとをつなぎ止めるように作用し、樹脂微粒子８ｃが吸湿体８ａとバインダ８ｂとの分離を抑制し、吸湿部材８の形成後の流動や液だれ部の発生を抑制することができる。   Further, the resin fine particles 8c can be well dispersed in the binder 8b due to the affinity with the binder 8b. Further, since the resin fine particles 8c are also compatible with the moisture absorbing member 8a, the resin fine particles 8c act so as to interpose the moisture absorbing body 8a and the binder 8b, so that the resin fine particles 8c are bonded to the moisture absorbing body 8a and the binder 8b. Can be suppressed, and the flow after the formation of the hygroscopic member 8 and the occurrence of a dripping portion can be suppressed.

また、吸湿部材８に対して、樹脂微粒子８ｃを加えたことによって、吸湿部材８中のバインダ８ｂの使用量をより効果的に抑えることができ、吸湿部材８の高温時にバインダ８ｂが分離する量を抑制することができる。   Further, by adding the resin fine particles 8c to the hygroscopic member 8, the amount of the binder 8b in the hygroscopic member 8 can be more effectively suppressed, and the amount of the binder 8b separated when the hygroscopic member 8 is at a high temperature. Can be suppressed.

なお、本発明の実施の形態では、上述した構成部品からなる有機ＥＬパネルを例に挙げて説明したが、本発明はこれに限定されるものではなく、その構成や処理は同様の効果が得られるものであればよく、例えば、封止部材とガラス基板とで囲まれる気密空間の体積に応じた吸湿部材の膜厚、吸湿体や樹脂微粒子の形状を適宜選択できる。   In the embodiment of the present invention, the organic EL panel composed of the above-described components has been described as an example. However, the present invention is not limited to this, and the configuration and processing have the same effect. For example, the film thickness of the hygroscopic member, the shape of the hygroscopic material and the resin fine particles can be appropriately selected according to the volume of the airtight space surrounded by the sealing member and the glass substrate.

なお、本発明の樹脂微粒子８ｃは、本実施形態に限定されるものではなく、耐熱温度１２０℃以上で含水率１％以下の条件を満たす合成樹脂で、かつその平均粒径が４０μｍ以下の樹脂微粒子であればよい。例えば、ＰＴＦＥ（ポリテトラフルオロエチレン）を採用してもよい。また、その形状も球形に限定されるものではなく、不定型な粉体であっても良い。例えば、住友スリーエム株式会社製ダイニオンＴＦマイクロパウダーシリーズで、耐熱温度が２００℃以上、含水率１％以下のもので、平均粒径５〜３０μｍ程度のものを選択して使用する。   The resin fine particles 8c of the present invention are not limited to the present embodiment, and are synthetic resins that satisfy the conditions of a heat resistant temperature of 120 ° C. or higher and a water content of 1% or less, and an average particle size of 40 μm or less. Any fine particles may be used. For example, PTFE (polytetrafluoroethylene) may be employed. Further, the shape is not limited to a spherical shape, and may be an irregular powder. For example, a Dionion TF micro powder series manufactured by Sumitomo 3M Limited, having a heat resistant temperature of 200 ° C. or more and a water content of 1% or less, and having an average particle size of about 5 to 30 μm is selected and used.

なお、本発明の樹脂微粒子８ｃの吸湿部材８に対する添加量は前記実施形態に限定されるものではなく、樹脂微粒子が０．３〜５ｗｔ％の範囲であればよい。   In addition, the addition amount with respect to the moisture absorption member 8 of the resin fine particle 8c of this invention is not limited to the said embodiment, The resin fine particle should just be the range of 0.3-5 wt%.

本発明の実施形態の有機ＥＬパネルを示す斜視図である。It is a perspective view which shows the organic electroluminescent panel of embodiment of this invention. 同実施形態の有機ＥＬパネルの断面図である。It is sectional drawing of the organic electroluminescent panel of the same embodiment. 同実施形態の有機ＥＬパネルの製造方法を示す図。The figure which shows the manufacturing method of the organic electroluminescent panel of the embodiment. 同実施形態の吸湿部材の塗布装置を示す図。The figure which shows the coating device of the moisture absorption member of the embodiment. 同実施形態の吸湿部材の塗布方法を示す図。The figure which shows the coating method of the moisture absorption member of the embodiment.

符号の説明Explanation of symbols

１ 有機ＥＬパネル
２ ガラス基板（支持基板）
３ 透明電極（陽極）
５ 有機層
６ 背面電極（陰極）
７ 封止部材
８ 吸湿部材
８ａ 吸湿体
８ｂ バインダ
８ｃ 樹脂微粒子
９ 有機ＥＬ素子 1 Organic EL panel 2 Glass substrate (support substrate)
3 Transparent electrode (anode)
5 Organic layer 6 Back electrode (cathode)
7 Sealing member 8 Hygroscopic member 8a Hygroscopic body 8b Binder 8c Resin fine particles 9 Organic EL element

Claims (6)

少なくとも吸湿粉粒体からなる吸湿体と、前記吸湿体を保持する不活性液体からなるバインダと、樹脂微粒子とからなることを特徴とする吸湿部材。   A hygroscopic member comprising at least a hygroscopic body composed of hygroscopic powder particles, a binder composed of an inert liquid that holds the hygroscopic body, and resin fine particles. 前記樹脂微粒子が、耐熱温度１２０℃以上で含水率１％以下で平均粒径４０μｍ以下であることを特徴とする請求項１に記載の吸湿部材。   2. The moisture absorbing member according to claim 1, wherein the resin fine particles have a heat resistant temperature of 120 ° C. or more, a water content of 1% or less, and an average particle size of 40 μm or less. 前記樹脂微粒子を０．３〜５ｗｔ％含むことを特徴とする請求項１に記載の吸湿部材。   The hygroscopic member according to claim 1, comprising 0.3 to 5 wt% of the resin fine particles. 少なくとも発光層を有する有機層を陽極と陰極とで狭持した有機ＥＬ素子を透光性の支持基板上に形成し、前記有機層を覆うように封止部材を前記支持基板上に設け、少なくとも吸湿粉粒体からなる吸湿体と、前記吸湿体を保持する不活性液体からなるバインダと、樹脂微粒子とからなる吸湿部材を前記封止部材に設けたことを特徴とする有機ＥＬパネル。   An organic EL element having at least an organic layer having a light emitting layer sandwiched between an anode and a cathode is formed on a translucent support substrate, and a sealing member is provided on the support substrate so as to cover the organic layer, An organic EL panel comprising a hygroscopic body composed of a hygroscopic powder granule, a binder composed of an inert liquid holding the hygroscopic body, and a hygroscopic member composed of resin fine particles on the sealing member. 前記樹脂微粒子が、耐熱温度１２０℃以上で含水率１％以下で平均粒径４０μｍ以下であることを特徴とする請求項４に記載の有機ＥＬパネル。   5. The organic EL panel according to claim 4, wherein the fine resin particles have a heat resistant temperature of 120 ° C. or higher, a water content of 1% or less, and an average particle size of 40 μm or less. 前記樹脂微粒子を０．３〜５ｗｔ％含むことを特徴とする請求項４に記載の有機ＥＬパネル。   The organic EL panel according to claim 4, comprising 0.3 to 5 wt% of the resin fine particles.
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JP2011082167A (en) * 2009-10-08 2011-04-21 Samsung Mobile Display Co Ltd Substrate bonding apparatus and substrate bonding method
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US9818981B2 (en) * 2014-12-24 2017-11-14 Panasonic Intellectual Property Management Co., Ltd. Organic light-emitting device and organic display apparatus

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