JP2015513609A - 封止膜を堆積するための方法 - Google Patents
封止膜を堆積するための方法 Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/844—Encapsulations
- H10K50/8445—Encapsulations multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/26—Deposition of carbon only
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/34—Nitrides
- C23C16/345—Silicon nitride
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/873—Encapsulations
- H10K59/8731—Encapsulations multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Electroluminescent Light Sources (AREA)
- Chemical Vapour Deposition (AREA)
- Formation Of Insulating Films (AREA)
Abstract
Description
本発明の実施形態は、概して、化学蒸着処理を用いた薄膜の堆積に関する。特に、本発明は、大面積基板上に薄膜を堆積する方法に関する。
有機発光ダイオード(OLED)ディスプレイは、液晶ディスプレイ(LCD)と比較して、より高速な応答時間、より大きな視野角、より高いコントラスト、より軽量、より低い消費電力、及びフレキシブル基板へ対応可能であるという観点から、ディスプレイ用途において、最近大きな関心を得ている。効率的なエレクトロルミネセンス(EL)が1987年にC.W.Tang及びS.A.Van Slykeによって報告された後、OLEDの実用化は、光を放射するための二つの電極の間に挟まれた有機材料の2つの層を使用することによって可能となっている。2つの有機層を、旧来の単一の有機層とは対照的に、モノポーラ(正孔)の輸送が可能な一方の層と、電界発光(エレクトロルミネッセンス)のための他方の層を含み、こうして、OLEDディスプレイのための必要な動作電圧を下げている。
本発明は、大面積基板を処理するように構成されたプラズマ化学蒸着システム(例えば、カリフォルニア州サンタクララのアプライドマテリアル社(Applied Materials Inc.)の一部門であるAKT(商標名)から入手できる様々な基板サイズ用のAKT(商標名)1600、AKT(商標名)3500、AKT(商標名)4300、AKT(商標名)5500、AKT(商標名)10K、AKT(商標名)15K、及びAKT(商標名)25Kを含む各種の平行平板型高周波(RF)プラズマ強化化学蒸着(PECVD)システム)を参照して以下に例示的に記載される。しかしながら、本発明は、他のシステム構成(例えば、円形基板を処理するように構成されたシステムを含む他の化学蒸着システム及び他の膜堆積システム)において有用性を有することが理解されるべきである。
図5は、本発明の実施形態に係る本発明の方法を用いて作製された例示的なディスプレイデバイス500を示す。ディスプレイデバイス500は、基板501とデバイス502を含むことができ、これは封止される必要がある任意のタイプのディスプレイデバイスであることができる。例えば、デバイス502は、とりわけ、OLED、FOLED、PLED、有機TFT、太陽電池、上面発光デバイス、底面発光デバイスであることができる。そこで、約1000Å以上の厚さを有する封止層は、本発明の方法を用いて堆積され、これによって水/湿気及び空気が基板501及びデバイス502内へ侵入するのを防止する。
基板面積1m2当たり約72〜約108sccmの流量でケイ素含有ガス(例えば、SiH4)を供給することができ、
基板面積1m2当たり約96〜約144sccmの流量で第1窒素含有ガス(例えば、NH3)を供給することができ、
基板面積1m2当たり約240〜約360ccmの流量で第2ケイ素含有ガス(例えば、N2)を供給することができる。
基板面積1m2当たり約1550〜約3115sccm(例えば、基板面積1m2当たり約1720〜約2830sccmの間(例えば、基板面積1m2当たり約1720sccm))の流量でケイ素含有ガス(例えば、SiH4)を供給することができ、
基板面積1m2当たり約2360〜約6140sccm(例えば、基板面積1m2当たり約2625〜約5580sccmの間(例えば、基板面積1m2当たり約2750sccm))の流量で第1窒素含有ガス(例えば、NH3)を供給することができ、
基板面積1m2当たり約9305〜約15455sccm(例えば、基板面積1m2当たり約10340〜約14050sccmの間(例えば、基板面積1m2当たり約10340sccm))の流量で第2ケイ素含有ガス(例えば、N2)を供給することができる。
1以上のケイ素含有無機バリア層が、処理チャンバ内に送出された前駆体の混合物から堆積される。前駆体は、ケイ素含有前駆体(例えば、とりわけ、基板上に封止層として窒化ケイ素(SiN)、窒化ケイ素(SiON)、又は酸化ケイ素(SiO)、炭化ケイ素(SiC)の層を堆積させるために、シラン(SiH4)、Si2H6、SiF4)を含むことができる。ケイ素含有前駆体は、例えば、約400mm×約500mmの基板サイズに対して、10sccm以上(例えば、約100sccm〜約500sccm)の流量で送出させることができる。窒素含有前駆体は、様々な窒素含有前駆体に対して、約5sccm以上(例えば、約100sccm〜約6000sccm)の流量で送出させることができる。
本発明の態様は、低誘電率材料層とケイ素含有無機バリア層を交互に堆積する工程を提供する。約4未満の誘電率(κ)を有する1つの例示的な低誘電率材料層は、アモルファスカーボン材料である。低誘電率材料の他の例は、とりわけ、炭素含有低誘電率材料、炭素ドープされたシリコン材料、ダイヤモンドライクカーボン材料が挙げられる。
Claims (16)
- ケイ素含有ガス、第1窒素含有ガス、第2窒素含有ガス及び水素ガスを含むガス混合物を処理チャンバ内に送出する工程と、
処理チャンバ内に配置された基板の上方に約800ミル〜約1800ミル離間したガス分配プレートアセンブリに、約0.350ワット/cm2〜約0.903ワット/cm2を印加することによって、処理チャンバ内でガス混合物を励起させる工程と、
処理チャンバ内で励起したガス混合物を約0.5トール〜約3.0トールの圧力に維持する工程と、
励起したガス混合物の存在下で基板上に無機封止膜を堆積させる工程を含む封止膜の形成方法。 - ガス混合物を送出する工程は、
基板面積1m2当たり約1550〜約3115sccmの流量でケイ素含有ガスを送出する工程と、
基板面積1m2当たり約2360〜約6140sccmの流量で第1窒素含有ガスを送出する工程と、
基板面積1m2当たり約9305〜約15455sccmの流量で第2ケイ素含有ガスを送出する工程を含む請求項1記載の方法。 - ガス混合物を送出する工程は、
基板面積1m2当たり約23630〜約43325sccmの流量で水素ガスを送出する工程を含む請求項2記載の方法。 - 無機封止膜は、約0.8ダイン/cm2の応力を有する請求項3記載の方法。
- 無機封止膜は、波長400nmで約80%を超える透明性を有する請求項4記載の方法。
- 第2窒素含有ガスは、N2である請求項2記載の方法。
- 無機封止膜上に有機誘電体層を堆積させる工程を含む請求項1記載の方法。
- 有機誘電体層上に第2無機封止膜を堆積させる工程を含む請求項7記載の方法。
- 第2無機封止膜を堆積させる工程は、第1無機封止膜上に第2無機封止膜の一部を堆積させる工程を含む請求項6記載の方法。
- 第2無機封止膜を堆積させる工程は、
基板の上方に約800ミル〜約1800ミル離間させたガス分配プレートアセンブリに、約0.350ワット/cm2〜約0.903ワット/cm2を印加することによって、ケイ素含有ガス、第1窒素含有ガス、第2窒素含有ガス及び水素ガスを含む第2ガス混合物を励起させる工程と、
励起した第2ガス混合物を約0.5トール〜約3.0トールの圧力に維持する工程と、
励起した第2ガス混合物の存在下で基板上に無機封止膜を堆積させる工程を含む請求項6記載の方法。 - 第2ガス混合物を送出する工程は、
基板面積1m2当たり約1550〜約3115sccmの流量でケイ素含有ガスを送出する工程と、
基板面積1m2当たり約2360〜約6140sccmの流量で第1窒素含有ガスを送出する工程と、
基板面積1m2当たり約9305〜約15455sccmの流量で第2ケイ素含有ガスを送出する工程を含む請求項8記載の方法。 - 第2ガス混合物を送出する工程は、
基板面積1m2当たり約23630〜約43325sccmの流量で水素ガスを送出する工程を含む請求項11記載の方法。 - 第2無機封止膜は、約0.8ダイン/cm2の応力を有する請求項12記載の方法。
- 無機封止膜は、波長400nmで約80%を超える透明性を有する請求項13記載の方法。
- 無機封止膜を堆積させる工程は、有機誘電体層上に無機封止膜を堆積させる工程を含む請求項1記載の方法。
- 無機封止膜を堆積させる工程は、SiNxを含む請求項1記載の方法。
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