JP7370375B2 - 表示装置及び半導体装置 - Google Patents
表示装置及び半導体装置 Download PDFInfo
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Description
Claims (20)
- 基板と、
前記基板上に位置し、ポリシリコン半導体層を有する第1薄膜トランジスタと、
前記基板上に位置し、酸化物半導体層を有する第2薄膜トランジスタと、
前記ポリシリコン半導体層と前記基板との間に位置し、前記ポリシリコン半導体層と対向する第1遮光膜と、
前記酸化物半導体層と前記基板との間に位置し、前記酸化物半導体層と対向する第2遮光膜と、
前記第1遮光膜の上に位置する少なくとも1つの第1絶縁膜と、
前記第1絶縁膜の上に位置し、互いに積層している複数の第2絶縁膜と、
前記複数の第2絶縁膜の上に位置する少なくとも1つの第3絶縁膜と、
前記第1遮光膜と対向し、前記複数の第2絶縁膜の各々を貫通し、前記第1絶縁膜と前記第3絶縁膜とを貫通しない第1スルーホールと、
前記第1遮光膜と対向し、前記第1絶縁膜と前記第3絶縁膜とを貫通し、一部が前記第1スルーホールの中に位置する第2スルーホールと、を有し、
前記第1遮光膜は、前記第2スルーホールを介して、少なくとも一部が前記第3絶縁膜の上に位置する第1導電部材と電気的に接続することを特徴とする表示装置。 - 前記第3絶縁膜の一部は、前記第1スルーホールの中に位置し、前記第1絶縁膜と直に接し、
前記第2スルーホールは、前記第3絶縁膜の前記一部と前記第1絶縁膜とを一括で貫通することを特徴とする請求項1に記載の表示装置。 - 前記第1遮光膜には、固定電位が印加されることを特徴とする請求項1に記載の表示装置。
- 前記第2遮光膜には、前記固定電位が印加されることを特徴とする請求項3に記載の表示装置。
- 画素電極と前記画素電極に対向するコモン電極とを備える複数の画素を有し、
前記コモン電極にはコモン電位が供給され、
前記固定電位は前記コモン電位であることを特徴とする請求項3に記載の表示装置。 - 前記第2遮光膜は、前記第1薄膜トランジスタの第1ゲート電極と同層に位置することを特徴とする請求項1に記載の表示装置。
- 前記第2遮光膜と前記第1ゲート電極とは、同じ材料からなることを特徴とする請求項6に記載の表示装置。
- 前記第1薄膜トランジスタは、前記ポリシリコン半導体層と電気的に接続する第1ソース電極と第1ドレイン電極とを有し、
前記第1ソース電極の一部と前記第1ドレイン電極の一部とは、前記複数の第2絶縁膜の上に位置し、且つ前記第3絶縁膜で覆われており、
前記第3絶縁膜を貫通する第3スルーホールが、前記第1ソース電極の前記一部と前記第1ドレイン電極の前記一部との一方と重なって位置し、
前記一方は、前記第3スルーホールを介して、少なくとも一部が前記第3絶縁膜の上に位置する第1接続配線と電気的に接続することを特徴とする請求項1に記載の表示装置。 - 前記第1ソース電極の前記一部と前記第2絶縁膜との間には、前記第1ソース電極の前記一部と前記第2絶縁膜とに直に接するアルミニウム酸化膜が位置し、
前記第1ドレイン電極の前記一部と前記第2絶縁膜との間には、前記第1ドレイン電極の前記一部と前記第2絶縁膜とに直に接するアルミニウム酸化膜が位置することを特徴とする請求項8に記載の表示装置。 - 前記第1薄膜トランジスタは、第1ゲート電極を有し、
前記第1ゲート電極は、前記複数の第2絶縁膜の上に位置し、且つ前記第3絶縁膜で覆われている第2接続配線と電気的に接続し、
前記第3絶縁膜を貫通する第4スルーホールが、前記第2接続配線と重なって位置し、
前記第2接続配線は、前記第4スルーホールを介して、少なくとも一部が前記第3絶縁膜の上に位置する第1ゲート配線と電気的に接続することを特徴とする請求項1に記載の表示装置。 - 前記第2接続配線と前記第2絶縁膜との間には、前記第2接続配線と前記第2絶縁膜とに直に接するアルミニウム酸化膜が位置することを特徴とする請求項10に記載の表示装置。
- 前記第2薄膜トランジスタは、第2ゲート電極を有し、
前記第2ゲート電極は、前記複数の第2絶縁膜の上に位置し、且つ前記第3絶縁膜で覆われており、
前記第3絶縁膜を貫通する第5スルーホールが、前記第2ゲート電極と重なって位置し、
前記第2ゲート電極は、前記第5スルーホールを介して、少なくとも一部が前記第3絶縁膜の上に位置する第2ゲート配線と電気的に接続することを特徴とする請求項1に記載の表示装置。 - 前記第1遮光膜と前記第2遮光膜とは、同層に位置し、
前記第2遮光膜と対向し、前記複数の第2絶縁膜の各々を貫通し、前記第1絶縁膜と前記第3絶縁膜とを貫通しない第6スルーホールと、
前記第2遮光膜と対向し、前記第1絶縁膜と前記第3絶縁膜とを貫通し、一部が前記第1スルーホールの中に位置する第7スルーホールと、を有し、
前記第2遮光膜は、前記第7スルーホールを介して、少なくとも一部が前記第3絶縁膜の上に位置する第2導電部材と電気的に接続することを特徴とする請求項1に記載の表示装置。 - 前記酸化物半導体層は、前記第1薄膜トランジスタの第1ゲート電極と同層に位置することを特徴とする請求項13に記載の表示装置。
- 前記第1薄膜トランジスタは、第1ゲート電極を有し、
前記基板と前記酸化物半導体層との間の距離は、前記基板と前記第1ゲート電極との間の距離よりも大きいことを特徴とする請求項1に記載の表示装置。 - 前記第2薄膜トランジスタは、第2ゲート電極と、第2ドレイン電極と、第2ソース電極と、第8コンタクトホールおよび第9コンタクトホールを備える第2ゲート絶縁膜と、
を有し、
前記酸化物半導体層は、前記第8コンタクトホールを介して前記第2ドレイン電極と接続し、かつ前記第9コンタクトホールを介して前記第2ソース電極と接続し、
前記第8コンタクトホールの側壁は、前記第2ドレイン電極と接していない第1領域を有し、
前記第9コンタクトホールの側壁は、前記第2ソース電極と接していない第2領域を有することを特徴とする請求項1に記載の表示装置。 - 前記第8コンタクトホールの中において、前記第1領域と前記第2ドレイン電極との間には前記第3絶縁膜が位置し、
前記第9コンタクトホールの中において、前記第2領域と前記第2ソース電極との間には前記第3絶縁膜が位置することを特徴とする請求項16に記載の表示装置。 - 基板と、
前記基板上に位置し、ポリシリコン半導体層を有する第1薄膜トランジスタと、
前記基板上に位置し、酸化物半導体層を有する第2薄膜トランジスタと、
前記ポリシリコン半導体層と前記基板との間に位置し、前記ポリシリコン半導体層と対向する第1導電膜と、
前記酸化物半導体層と前記基板との間に位置し、前記酸化物半導体層と対向する第2導電膜と、
前記第1導電膜と前記第2導電膜との少なくとも一方の導電膜の上に位置する少なくとも1つの第1絶縁膜と、
前記第1絶縁膜の上に位置し、互いに積層している複数の第2絶縁膜と、
前記複数の第2絶縁膜の上に位置する少なくとも1つの第3絶縁膜と、
前記一方の導電膜と対向し、前記複数の第2絶縁膜の各々を貫通し、前記第1絶縁膜と前記第3絶縁膜とを貫通しない第1スルーホールと、
前記一方の導電膜と対向し、前記第1絶縁膜と前記第3絶縁膜とを貫通し、一部が前記第1スルーホールの中に位置する第2スルーホールと、を有し、
前記一方の導電膜は、前記第2スルーホールを介して、少なくとも一部が前記第3絶縁膜の上に位置する第1導電部材と電気的に接続することを特徴とする半導体装置。 - 前記第3絶縁膜の一部は、前記第1スルーホールの中に位置し、前記第1絶縁膜と直に接し、
前記第2スルーホールは、前記第3絶縁膜の前記一部と前記第1絶縁膜とを一括で貫通することを特徴とする請求項18に記載の半導体装置。 - 前記第1絶縁膜は、前記第1導電膜と前記第2導電膜との両方の上に位置し、
前記一方の導電膜とは異なる他方の導電膜と対向し、前記複数の第2絶縁膜の各々を貫通し、前記第1絶縁膜と前記第3絶縁膜とを貫通しない第6スルーホールと、
前記他方の導電膜と対向し、前記第1絶縁膜と前記第3絶縁膜とを貫通し、一部が前記第1スルーホールの中に位置する第7スルーホールと、を有し、
前記他方の導電膜は、前記第7スルーホールを介して、少なくとも一部が前記第3絶縁膜の上に位置する第2導電部材と電気的に接続することを特徴とする請求項18に記載の半導体装置。
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