JP2012049126A - 有機発光ディスプレイ装置及びその製造方法 - Google Patents
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Abstract
【解決手段】基板上に形成された薄膜トランジスタの活性層と、活性層及び第1絶縁層上に形成され、第1透明導電層及び第1金属層を備えるゲート電極と、ゲート電極及び第2絶縁層上に形成され、第2絶縁層に形成されたコンタクトホールを通じて前記活性層に連結された第2金属層、第2金属層上に形成された第3金属層、及び第3金属層上に形成された第2透明導電層を備えるソース及びドレイン電極と、第1絶縁層上に形成され、第1透明導電層、第3金属層、及び第2透明導電層を備える画素電極と、画素電極上に配置され、有機発光層を備える中間層と、中間層を挟んで画素電極に対向して配置される対向電極と、を備える有機発光ディスプレイ装置である。
【選択図】図18
Description
11 バッファ層
12 半導体層
13 第1絶縁層
14 第1透明導電層
15 第1金属層
16 第2絶縁層
17 第2金属層
18 第3金属層
19 第2透明導電層
20 第4絶縁層
21 中間層
21a 有機発光層
22 対向電極
114,118,119 画素電極
212 活性層
212a ソース領域
212b ドレイン領域
212c チャネル領域
214,215 ゲート電極
217a ソース電極
217b ドレイン電極
218a,219a ソース電極のキャッピング層
218b,219b ドレイン電極のキャッピング層
312 キャパシタの第1電極
314 キャパシタの第2電極
Claims (26)
- 基板上に形成された薄膜トランジスタの活性層と、
前記活性層及び第1絶縁層上に形成され、第1透明導電層及び第1金属層を備えるゲート電極と、
前記ゲート電極及び第2絶縁層上に形成され、前記第2絶縁層に形成されたコンタクトホールを通じて前記活性層に連結された第2金属層、前記第2金属層上に形成された第3金属層、及び前記第3金属層上に形成された第2透明導電層を備えるソース及びドレイン電極と、
前記第1絶縁層上に形成され、前記第1透明導電層、前記第3金属層、及び前記第2透明導電層を備える画素電極と、
前記画素電極上に配置され、有機発光層を備える中間層と、
前記中間層を挟んで前記画素電極に対向して配置される対向電極と、を備えることを特徴とする有機発光ディスプレイ装置。 - 前記第3金属層は、反射物質を含むことを特徴とする請求項1に記載の有機発光ディスプレイ装置。
- 前記反射物質は、銀を含むことを特徴とする請求項2に記載の有機発光ディスプレイ装置。
- 前記第1透明導電層及び第2透明導電層は、ITO(Indium Tin Oxide)、IZO(Indium Zink Oxide)、酸化亜鉛(ZnO)、酸化インジウム(In2O3)、IGO(Indium Galium Oxide)、及びAZO(Aluminium Zink Oxide)からなるグループから選択された少なくとも一つ以上を含むことを特徴とする請求項1に記載の有機発光ディスプレイ装置。
- 前記第1金属層及び第2金属層は、多層の金属層を備えることを特徴とする請求項1に記載の有機発光ディスプレイ装置。
- 前記第1金属層及び第2金属層は、同じ物質からなることを特徴とする請求項1に記載の有機発光ディスプレイ装置。
- 前記第1金属層及び第2金属層は、アルミニウムを含むことを特徴とする請求項1に記載の有機発光ディスプレイ装置。
- 前記画素電極の第1透明導電層の端部と、前記第3金属層及び第2透明導電層の端部とは、エッチング面が互いに異なることを特徴とする請求項1に記載の有機発光ディスプレイ装置。
- 前記画素電極の第1透明導電層の上部、前記第3金属層の側面、及び前記第2絶縁層の下部に、前記第1金属層が配置されたことを特徴とする請求項1に記載の有機発光ディスプレイ装置。
- 前記画素電極の第1透明導電層は、前記第1金属層及び前記第2絶縁層を貫通して形成されたビアホールを通じて、前記ソース及びドレイン電極のうち一つと連結されることを特徴とする請求項9に記載の有機発光ディスプレイ装置。
- 前記活性層と同じ物質を含み、前記活性層と同じ層に形成された第1電極、及び前記第1透明導電層を備え、前記第1絶縁層上に形成された第2電極を備えたキャパシタをさらに備えることを特徴とする請求項1に記載の有機発光ディスプレイ装置。
- 前記キャパシタの第2電極は、前記第1透明導電層上に、前記第3金属層及び前記第2透明導電層をさらに備えることを特徴とする請求項11に記載の有機発光ディスプレイ装置。
- 前記画素電極は、前記有機発光層から出射された光を一部透過及び一部反射する半透過ミラーであることを特徴とする請求項1に記載の有機発光ディスプレイ装置。
- 前記対向電極は、前記有機発光層から出射された光を反射する反射ミラーであることを特徴とする請求項1に記載の有機発光ディスプレイ装置。
- 前記画素電極のエッジを取り囲み、前記ソース及びドレイン電極を覆う画素定義膜をさらに備えることを特徴とする請求項1に記載の有機発光ディスプレイ装置。
- 基板上に半導体層を形成し、前記半導体層をパターニングして薄膜トランジスタの活性層を形成する第1マスク工程と、
前記活性層上に第1絶縁層、第1透明導電層及び第1金属層を形成し、前記第1透明導電層及び第1金属層をパターニングして、画素電極の基底層及び前記薄膜トランジスタのゲート電極を形成する第2マスク工程と、
前記基底層及びゲート電極上に第2絶縁層を形成し、前記第2絶縁層をパターニングして、前記基底層の第1透明導電層を露出させる第1開口、前記薄膜トランジスタのソース及びドレイン領域を露出させるコンタクトホールを形成する第3マスク工程と、
前記第1開口及び前記コンタクトホール上に第2金属層を形成し、前記第2金属層をパターニングして、前記ソース及びドレイン領域に連結されるソース及びドレイン電極を形成する第4マスク工程と、
前記ソース及びドレイン電極上に第3金属層及び第2透明導電層を形成し、前記第3金属層及び第2透明導電層をパターニングして、前記画素電極の上部層、前記ソース及びドレイン電極のキャッピング層を形成する第5マスク工程と、を含むことを特徴とする有機発光ディスプレイ装置の製造方法。 - 前記第2マスク工程後、前記ゲート電極をマスクとして、前記ソース及びドレイン領域にイオン不純物をドーピングすることを特徴とする請求項16に記載の有機発光ディスプレイ装置の製造方法。
- 前記第3マスク工程は、前記第2絶縁層に前記第1開口及びコンタクトホールを形成する第1エッチング工程、及び前記第1開口に露出された前記画素電極の基底層の第1金属層を除去する第2エッチング工程を含むことを特徴とする請求項16に記載の有機発光ディスプレイ装置の製造方法。
- 前記第3マスク工程は、前記基底層の第1金属層及び前記第2絶縁層を貫通するビアホールを形成することをさらに含むことを特徴とする請求項16に記載の有機発光ディスプレイ装置の製造方法。
- 前記第4マスク工程において、前記ソース及びドレイン電極は、前記コンタクトホール及び前記ビアホール上に同時に形成されることを特徴とする請求項19に記載の有機発光ディスプレイ装置の製造方法。
- 前記第5マスク工程後、前記画素電極の上部層を露出させ、前記ソース及びドレイン電極のキャッピング層を覆う第4絶縁膜を形成することを特徴とする請求項16に記載の有機発光ディスプレイ装置の製造方法。
- 前記第4絶縁膜の形成は、マスク工程を使用しないことを特徴とする請求項21に記載の有機発光ディスプレイ装置の製造方法。
- 前記画素電極の上部層に有機発光層を備える中間層、及び前記中間層上に対向電極をさらに形成することを特徴とする請求項16に記載の有機発光ディスプレイ装置の製造方法。
- 前記第3金属層は、反射物質を含み、前記画素電極の上部層は、光を一部透過及び一部反射する半透過ミラーで形成されることを特徴とする請求項16に記載の有機発光ディスプレイ装置の製造方法。
- 前記第1マスク工程において、前記活性層と同じ物質で同じ層にキャパシタの第1電極を形成し、前記第2マスク工程において、前記第1透明導電層でキャパシタの第2電極を形成することを特徴とする請求項16に記載の有機発光ディスプレイ装置の製造方法。
- 前記第3マスク工程後、前記キャパシタの第1電極にイオン不純物をドーピングすることを特徴とする請求項25に記載の有機発光ディスプレイ装置の製造方法。
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