JP2021524148A - 薄膜トランジスタ及びその製造方法、アレイ基板、表示装置 - Google Patents
薄膜トランジスタ及びその製造方法、アレイ基板、表示装置 Download PDFInfo
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- 239000000758 substrate Substances 0.000 title claims abstract description 231
- 239000010409 thin film Substances 0.000 title claims abstract description 126
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 38
- 239000010410 layer Substances 0.000 claims description 311
- 239000000463 material Substances 0.000 claims description 39
- 239000011229 interlayer Substances 0.000 claims description 36
- 238000002161 passivation Methods 0.000 claims description 23
- 229910044991 metal oxide Inorganic materials 0.000 claims description 8
- 150000004706 metal oxides Chemical class 0.000 claims description 8
- 239000004065 semiconductor Substances 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 7
- 235000013405 beer Nutrition 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 41
- 229910052581 Si3N4 Inorganic materials 0.000 description 38
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 38
- 229910052814 silicon oxide Inorganic materials 0.000 description 38
- 229910052751 metal Inorganic materials 0.000 description 29
- 239000002184 metal Substances 0.000 description 29
- 230000008569 process Effects 0.000 description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 18
- 229910052802 copper Inorganic materials 0.000 description 18
- 239000010949 copper Substances 0.000 description 18
- 239000002356 single layer Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 14
- 230000003287 optical effect Effects 0.000 description 13
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 12
- NCMAYWHYXSWFGB-UHFFFAOYSA-N [Si].[N+][O-] Chemical compound [Si].[N+][O-] NCMAYWHYXSWFGB-UHFFFAOYSA-N 0.000 description 12
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 238000000059 patterning Methods 0.000 description 9
- 229920002120 photoresistant polymer Polymers 0.000 description 7
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 6
- 150000002739 metals Chemical class 0.000 description 6
- 229910052750 molybdenum Inorganic materials 0.000 description 6
- 239000011733 molybdenum Substances 0.000 description 6
- 229910052719 titanium Inorganic materials 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- 239000011787 zinc oxide Substances 0.000 description 6
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 5
- 229910000570 Cupronickel Inorganic materials 0.000 description 3
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 3
- 229910000990 Ni alloy Inorganic materials 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 229910001297 Zn alloy Inorganic materials 0.000 description 3
- KOMIMHZRQFFCOR-UHFFFAOYSA-N [Ni].[Cu].[Zn] Chemical compound [Ni].[Cu].[Zn] KOMIMHZRQFFCOR-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 229910021417 amorphous silicon Inorganic materials 0.000 description 3
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 3
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 229910052733 gallium Inorganic materials 0.000 description 3
- 229910001195 gallium oxide Inorganic materials 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229910052738 indium Inorganic materials 0.000 description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 3
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 3
- 229910001092 metal group alloy Inorganic materials 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000009916 joint effect Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Abstract
Description
10 ベース基板
11 第1ゲート電極
13 活性層
15 第2ゲート電極
17 ソース・ドレイン電極
Claims (15)
- 薄膜トランジスタであって、
ベース基板と、
ベース基板の一方側に位置する第1ゲート電極と、
前記第1ゲート電極における前記ベース基板から離れる一方側に位置する活性層と、
前記活性層における前記ベース基板から離れる一方側に位置する第2ゲート電極と、
前記第2ゲート電極における前記ベース基板から離れる一方側に位置するソース・ドレイン電極と、を含み、
前記ベース基板における前記ソース・ドレイン電極の正投影と前記ベース基板における 前記第2ゲート電極の正投影は、少なくとも部分的に重畳している
ことを特徴とする薄膜トランジスタ。 - 前記第1ゲート電極における前記ベース基板から離れる一方側に位置するバッファ層と、
前記活性層における前記ベース基板から離れる一方側に位置するゲート絶縁層と、
前記第2ゲート電極における前記ベース基板から離れる一方側に位置する層間誘電体層と、をさらに含む
ことを特徴とする請求項1に記載の薄膜トランジスタ。 - 前記層間誘電体層における前記ベース基板から離れる一方側に位置する接続電極をさらに含み、
前記バッファ層は、前記バッファ層を貫通する第1ビアホールを含み、
前記ベース基板における前記第1ビアホールの正投影と前記ベース基板における前記第1ゲート電極の正投影は、少なくとも部分的に重畳しており、
前記層間誘電体層は、前記層間誘電体層を貫通する第2ビアホール及び第3ビアホールを含み、
前記ベース基板における前記第2ビアホールの正投影と前記ベース基板における前記活性層の正投影は、少なくとも部分的に重畳しており、
前記ベース基板における前記第3ビアホールの正投影は、前記ベース基板における前記第1ビアホールの正投影を覆うとともに、前記ベース基板における第2ゲート電極の正投影と少なくとも部分的に重畳しており、
前記接続電極は、前記第1ビアホール及び前記第3ビアホールを介して前記第1ゲート電極に電気的に接続されるとともに、前記第3ビアホールを介して前記第2ゲート電極に電気的に接続される
ことを特徴とする請求項2に記載の薄膜トランジスタ。 - 前記ベース基板における前記第1ゲート電極の正投影は、前記ベース基板における前記活性層の正投影を覆っている
ことを特徴とする請求項1に記載の薄膜トランジスタ。 - 前記活性層は、金属酸化物半導体材料を含む
ことを特徴とする請求項1に記載の薄膜トランジスタ。 - 前記接続電極は、透明導電材料である
ことを特徴とする請求項3に記載の薄膜トランジスタ。 - 前記ソース・ドレイン電極における前記ベース基板から離れる一方側に位置するパッシベーション層と、
前記パッシベーション層における前記ベース基板から離れる一方側に位置し、環境光を吸収及び/又は反射するための遮光層と、をさらに含む
ことを特徴とする請求項3に記載の薄膜トランジスタ。 - アレイ基板であって、
請求項1〜7のいずれか1項に記載の薄膜トランジスタと、
前記薄膜トランジスタの前記ソース・ドレイン電極における前記ベース基板から離れる一方側に位置する感光素子と、を含み、
前記感光素子の第1電極は、前記薄膜トランジスタのソース電極又はドレイン電極に接続される
ことを特徴とするアレイ基板。 - 前記感光素子における前記ベース基板から離れる一方側に位置する導出層をさらに含み、
前記感光素子の第2電極は、前記導出層に接続される
ことを特徴とする請求項8に記載のアレイ基板。 - 薄膜トランジスタにおける第2ゲート電極と同一の層に設置されている導電層をさらに含み、
前記導電層は、前記導出層に接続され、
前記ベース基板における前記導電層の正投影と前記ベース基板における前記薄膜トランジスタの前記ソース・ドレイン電極の正投影は、少なくとも部分的に重畳している
ことを特徴とする請求項9に記載のアレイ基板。 - 前記薄膜トランジスタの前記ソース・ドレイン電極と同一の層に設置されている接続層をさらに含み、
前記導電層は、前記接続層を介して前記導出層に接続される
ことを特徴とする請求項10に記載のアレイ基板。 - 表示装置であって、
請求項8〜11のいずれか1項に記載のアレイ基板を含む
ことを特徴とする表示装置。 - 薄膜トランジスタの製造方法であって、
ベース基板を用意するステップと、
前記ベース基板の一方側に第1ゲート電極を形成するステップと、
前記第1ゲート電極における前記ベース基板から離れる側に活性層を形成するステップと、
前記活性層における前記ベース基板から離れる側に第2ゲート電極を形成するステップと、
前記第2ゲート電極における前記ベース基板から離れる側にソース・ドレイン電極を形成するステップと、を含み、
前記ベース基板における前記ソース・ドレイン電極の正投影と前記ベース基板における前記第2ゲート電極の正投影は、少なくとも部分的に重畳している
ことを特徴とする薄膜トランジスタの製造方法。 - 前記第1ゲート電極における前記ベース基板から離れる一方側に活性層を形成するステップは、
前記第1ゲート電極における前記ベース基板から離れる一方側に第1ビアホールを含むバッファ層を形成し、前記第1ビアホールが前記バッファ層を貫通し、前記ベース基板における前記第1ビアホールの正投影と前記ベース基板における前記第1ゲート電極の正投影が少なくとも部分的に重畳しているステップと、
前記バッファ層における前記ベース基板から離れる一方側に活性層を形成するステップと、を含み、
前記第2ゲート電極における前記ベース基板から離れる一方側にソース・ドレイン電極を形成するステップは、
前記第2ゲート電極における前記ベース基板から離れる一方側に第2ビアホール及び第3ビアホールを含む層間誘電体層を形成し、前記第2ビアホール及び前記第3ビアホールが前記層間誘電体層を貫通し、前記ベース基板における前記第2ビアホールの正投影と前記ベース基板における前記活性層の正投影が少なくとも部分的に重畳しており、前記ベース基板における前記第3ビアホールの正投影が前記ベース基板における前記第1ビアホールの正投影を覆っているステップと、
前記層間誘電体層における前記ベース基板から離れる一方側にソース・ドレイン電極及び接続電極を形成し、前記接続電極が前記第1ビアホール及び前記第3ビアホールを介して前記第1ゲート電極に電気的に接続されるとともに、前記第3ビアホールを介して前記第2ゲート電極に電気的に接続されるステップと、を含む
ことを特徴とする請求項13に記載の薄膜トランジスタの製造方法。 - 前記ソース・ドレイン電極における前記ベース基板から離れる一方側にパッシベーション層を形成するステップと、
前記パッシベーション層における前記ベース基板から離れる一方側に、環境光を吸収及び/又は反射するための遮光層を形成するステップと、をさらに含む
ことを特徴とする請求項14に記載の薄膜トランジスタの製造方法。
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