JP7250558B2 - 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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- JP7250558B2 JP7250558B2 JP2019027237A JP2019027237A JP7250558B2 JP 7250558 B2 JP7250558 B2 JP 7250558B2 JP 2019027237 A JP2019027237 A JP 2019027237A JP 2019027237 A JP2019027237 A JP 2019027237A JP 7250558 B2 JP7250558 B2 JP 7250558B2
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- 239000004065 semiconductor Substances 0.000 title claims description 214
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 63
- 229920005591 polysilicon Polymers 0.000 claims description 62
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- KRHYYFGTRYWZRS-UHFFFAOYSA-N hydrofluoric acid Substances F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 23
- 229910052751 metal Inorganic materials 0.000 description 21
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- QPJSUIGXIBEQAC-UHFFFAOYSA-N n-(2,4-dichloro-5-propan-2-yloxyphenyl)acetamide Chemical compound CC(C)OC1=CC(NC(C)=O)=C(Cl)C=C1Cl QPJSUIGXIBEQAC-UHFFFAOYSA-N 0.000 description 14
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 10
- 229960002050 hydrofluoric acid Drugs 0.000 description 8
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- 229910052738 indium Inorganic materials 0.000 description 2
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 239000001257 hydrogen Substances 0.000 description 1
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- 239000012535 impurity Substances 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- TYHJXGDMRRJCRY-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) tin(4+) Chemical compound [O-2].[Zn+2].[Sn+4].[In+3] TYHJXGDMRRJCRY-UHFFFAOYSA-N 0.000 description 1
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Description
Claims (12)
- 酸化物半導体を用いた第1のTFTとポリシリコン半導体を用いた第2のTFTとが形成された基板を有する表示装置であって、
前記第1のTFTにおいて、前記酸化物半導体を覆って第1の絶縁膜が形成され、前記第1のTFTの第1のゲート電極が前記第1の絶縁膜上に配置され、前記第1の絶縁膜に形成された第1のスルーホールを介して、前記第1のゲート電極と同層に形成された第1のドレイン電極が前記酸化物半導体に接続し、前記第1の絶縁膜に形成された第2のスルーホールを介して、前記ゲート第1の電極と同層に形成された第1のソース電極が前記酸化物半導体に接続し、
前記第1のドレイン電極及び前記第1のソース電極を覆って第2の絶縁膜が形成され、前記第2の絶縁膜に形成された第3のスルーホールを介して第1のドレイン配線が前記第1のドレイン電極に接続し、前記第2の絶縁膜に形成された第4のスルーホールを介して第1のソース配線が前記第1のソース電極に接続し、
前記第2のTFTは前記第1のTFTよりも基板の近くに位置し、
前記第2のTFTは第2のゲート電極、第2のドレイン電極と第2のソース電極を備え、
前記ポリシリコン半導体を覆って第3の絶縁膜 が配置され、
前記第3の絶縁膜上に前記第2のゲート電極が配置され、
前記第2のゲート電極を覆って層間絶縁膜が配置され、
前記層間絶縁膜は前記第1のTFTと前記第2のTFTの間に配置され、
第5のスルーホールは前記第1の絶縁膜と前記第2の絶縁膜と前記層間絶縁膜と前記第3の絶縁膜とを貫通し、
前記第2のドレイン電極が前記第5のスルーホールを介して前記ポリシリコン半導体に接触し、
第6のスルーホールは前記第1の絶縁膜と前記第2の絶縁膜と前記層間絶縁膜と前記第3の絶縁膜とを貫通し、
前記第2のソース電極が前記第6のスルーホールを介して前記ポリシリコン半導体に接触し、
前記第1のドレイン配線と前記第1のソース配線とは前記第2の絶縁膜の上に形成されていることを特徴とする表示装置。 - 前記第1のドレイン配線は、映像信号線であ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のソース配線は、画素電極と接続してい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のスルーホールと前記第3のスルーホールは、平面で視て、別な場所に形成され、前記第2のスルーホールと前記第4のスルーホールは、平面で視て、別な場所に形成されてい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のTFTの第1のゲート配線は、走査線と同じ層に形成されてい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のTFTの前記第1のドレイン配線と前記第1のソース配線、及び、前記第2のTFTの前記第2のドレイン電極と前記第2のソース電極は、同じ層に形成されていることを特徴とする請求項1に記載の表示装置。
- 前記表示装置は液晶表示装置であることを特徴とする請求項1に記載の表示装置。
- 前記表示装置は有機EL表示装置であることを特徴とする請求項1に記載の表示装置。
- 酸化物半導体を用いた第1のTFTとポリシリコン半導体を用いた第2のTFTとが形成された基板を有する半導体装置であって、
前記第1のTFTにおいて、前記酸化物半導体を覆って第1の絶縁膜が形成され、前記第1のTFTの第1ゲート電極が前記第1絶縁膜上に配置され、前記第1の絶縁膜に形成された第1のスルーホールを介して、前記第1のゲート電極と同層に形成された第1のドレイン電極が前記酸化物半導体に接続し、前記第1の絶縁膜に形成された第2のスルーホールを介して、前記第1のゲート電極と同層に形成された第1のソース電極が前記酸化物半導体に接続し、
前記第1のドレイン電極及び前記第1のソース電極を覆って第2の絶縁膜が形成され、前記第2の絶縁膜に形成された第3のスルーホールを介して第1のドレイン配線が前記第1のドレイン電極に接続し、前記第2の絶縁膜に形成された第4のスルーホールを介して第1のソース配線が前記第1のソース電極に接続し、
前記第2のTFTは前記第1のTFTよりも基板の近くに位置し、
前記第2のTFTは第2のゲート電極、第2のドレイン電極と第2のソース電極を備え、
前記ポリシリコン半導体を覆って第3の絶縁膜が配置され、
前記第3の絶縁膜上に前記前記第2のゲート電極が配置され、
前記第2のゲート電極を覆って層間絶縁膜が配置され、
前記層間絶縁膜は前記第1のTFTと前記第2のTFTの間に配置され、
第5のスルーホールは前記第1の絶縁膜と前記第2の絶縁膜と前記層間絶縁膜と前記第3の絶縁膜とを貫通し、
前記第2のドレイン電極が前記第5のスルホールを介して前記ポリシリコン半導体に接触し、
第6のスルーホールは前記第1の絶縁膜と前記第2の絶縁膜と前記層間絶縁膜と前記第3の絶縁膜とを貫通し、
前記第2ソース電極が前記第6のスルーホールを介して前記ポリシリコン半導体に接触し、
前記第1のドレイン配線と前記第1のソース配線とは第2の絶縁膜の上に形成されていることを特徴とする半導体装置。 - 前記第1のスルーホールと前記第3のスルーホールは、平面で視て、別な場所に形成され、前記第2のスルーホールと前記第4のスルーホールは、平面で視て、別な場所に形成されていることを特徴とする請求項9に記載の半導体装置。
- 前記第1のTFTの前記第1のドレイン配線と前記第1のソース配線、及び、前記第2のTFTの前記第2のドレイン電極と前記第2のソース電極は、同じ層に形成されていることを特徴とする請求項9に記載の半導体装置。
- 前記第1のTFTの前記第1のドレイン配線と前記第1のソース配線、及び、前記第2のTFTの前記第2のドレイン電極と前記第2のソース電極は、前記第2の絶縁膜の上に形成されていることを特徴とする請求項9に記載の半導体装置。
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