JP5537787B2 - 半導体装置の作製方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims description 227
- 238000000034 method Methods 0.000 title claims description 66
- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 239000001301 oxygen Substances 0.000 claims description 129
- 229910052760 oxygen Inorganic materials 0.000 claims description 129
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 119
- 238000004544 sputter deposition Methods 0.000 claims description 64
- 239000012298 atmosphere Substances 0.000 claims description 33
- 239000007789 gas Substances 0.000 claims description 26
- 238000009832 plasma treatment Methods 0.000 claims description 19
- 238000005530 etching Methods 0.000 claims description 15
- 229910001882 dioxygen Inorganic materials 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 4
- 239000010408 film Substances 0.000 description 259
- 239000010410 layer Substances 0.000 description 230
- 239000010409 thin film Substances 0.000 description 72
- 230000015572 biosynthetic process Effects 0.000 description 64
- 239000000758 substrate Substances 0.000 description 63
- 238000010438 heat treatment Methods 0.000 description 36
- 230000002950 deficient Effects 0.000 description 35
- 239000013078 crystal Substances 0.000 description 31
- 230000008569 process Effects 0.000 description 31
- 238000012545 processing Methods 0.000 description 29
- 229910052782 aluminium Inorganic materials 0.000 description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 21
- 239000001257 hydrogen Substances 0.000 description 20
- 229910052739 hydrogen Inorganic materials 0.000 description 20
- 229910052733 gallium Inorganic materials 0.000 description 18
- 229910052738 indium Inorganic materials 0.000 description 18
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 16
- 229910052725 zinc Inorganic materials 0.000 description 16
- 239000011701 zinc Substances 0.000 description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 15
- 239000010936 titanium Substances 0.000 description 15
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 14
- 229910052719 titanium Inorganic materials 0.000 description 14
- 238000012546 transfer Methods 0.000 description 14
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 13
- 229910052814 silicon oxide Inorganic materials 0.000 description 13
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 150000004767 nitrides Chemical class 0.000 description 10
- 239000012299 nitrogen atmosphere Substances 0.000 description 10
- 230000002829 reductive effect Effects 0.000 description 10
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 8
- 229910052581 Si3N4 Inorganic materials 0.000 description 8
- 229910052786 argon Inorganic materials 0.000 description 8
- 229910052750 molybdenum Inorganic materials 0.000 description 8
- 239000011733 molybdenum Substances 0.000 description 8
- -1 oxynitride Chemical class 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 8
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 8
- 238000002441 X-ray diffraction Methods 0.000 description 7
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 7
- 230000006866 deterioration Effects 0.000 description 7
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 7
- 239000011521 glass Substances 0.000 description 6
- 229910052736 halogen Inorganic materials 0.000 description 6
- 150000002367 halogens Chemical class 0.000 description 6
- 230000036961 partial effect Effects 0.000 description 6
- 238000009751 slip forming Methods 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 5
- 238000001755 magnetron sputter deposition Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 5
- 229910052721 tungsten Inorganic materials 0.000 description 5
- 239000010937 tungsten Substances 0.000 description 5
- 239000011787 zinc oxide Substances 0.000 description 5
- 239000000969 carrier Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000206 photolithography Methods 0.000 description 4
- 238000001552 radio frequency sputter deposition Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910005191 Ga 2 O 3 Inorganic materials 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910021417 amorphous silicon Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000001312 dry etching Methods 0.000 description 3
- 230000005669 field effect Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000013081 microcrystal Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 229910052715 tantalum Inorganic materials 0.000 description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000012300 argon atmosphere Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 2
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 150000002926 oxygen Chemical class 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000005546 reactive sputtering Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000005477 sputtering target Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000024891 symptom Diseases 0.000 description 2
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910017947 MgOx Inorganic materials 0.000 description 1
- 238000006124 Pilkington process Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000005407 aluminoborosilicate glass Substances 0.000 description 1
- 239000005354 aluminosilicate glass Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001784 detoxification Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005224 laser annealing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000414 obstructive effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
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- Thin Film Transistor (AREA)
- Dram (AREA)
Description
なお、以下の説明においてIn、Ga、及びZnを含む酸化物半導体膜を用いて形成された半導体層を「IGZO半導体層」とも記す。
本形態は、酸化物半導体をチャネル形成領域とする薄膜トランジスタのオフ電流を低減することを目的とする。以下に例示的な一実施形態を図1、図2、図3、図5を用いて説明する。
これにより、ソースとドレイン間であって、チャネルエッチ部流れるリーク電流を低減させることができる。
また、高抵抗領域106が窒化物による絶縁層と直接的に接しない構成とすることで、窒化物中の水素が拡散して高抵抗領域106、すなわち酸化物半導体層103に水酸基などに起因する欠陥を生成するのを防ぐことができる。
本形態は、少なくともゲート絶縁層と酸素過剰酸化物半導体層の積層を大気に触れることなく、連続成膜を行う逆スタガ型の薄膜トランジスタの作製例を以下に示す。ここでは、連続成膜を行う工程までの工程を示し、その後の工程は、実施の形態1に従って薄膜トランジスタを作製すればよい。
ただし、洗浄工程、ウエットエッチング、レジスト形成といった液体を用いる工程が第1の成膜工程と第2の成膜工程の間にある場合、本明細書でいう連続成膜の範囲には当てはまらないとする。
101 ゲート電極層
102 ゲート絶縁層
103 酸化物半導体層
104a ソース領域
104b ドレイン領域
105a ソース電極層
105b ドレイン電極層
106 高抵抗領域
107 高抵抗領域
108 絶縁膜
111 酸化物半導体膜
112 酸化物半導体層
113 マスク
114 酸化物半導体膜
115 酸化物半導体膜
116 マスク
117 導電膜
118 マスク
121 導電膜
122 マスク
170a 薄膜トランジスタ
170b 薄膜トランジスタ
170c 薄膜トランジスタ
80 搬送室
81 搬送ロボット
82 カセット室
83 ゲートバルブ
84 ゲートバルブ
85 ゲートバルブ
86 ゲートバルブ
87 ゲートバルブ
88 ゲートバルブ
89 第1の処理室
90 第2の処理室
91 第3の処理室
92 第4の処理室
93 第5の処理室
94 基板
Claims (4)
- ゲート電極上にゲート絶縁層を形成し、
前記ゲート絶縁層上に第1の酸化物半導体層と第2の酸化物半導体層とを順次形成し、
前記第2の酸化物半導体層に接する、一対のソース電極層及びドレイン電極層を形成し、
前記ソース電極層及びドレイン電極層をマスクとして、前記第2の酸化物半導体層及び前記第1の酸化物半導体層の一部をエッチングし、
前記エッチングにより露出した前記第2の酸化物半導体層及び前記第1の酸化物半導体層の表面に酸素プラズマ処理を行い、前記第1の酸化物半導体層のうち前記酸素プラズマ処理を行った領域を、前記第1の酸化物半導体層のうち前記酸素プラズマ処理を行っていない領域に比べて高抵抗化することを特徴とする半導体装置の作製方法。 - 請求項1において、
前記酸素プラズマ処理は、酸素ガス又は酸素ガスと希ガスの混合ガスによるグロー放電プ
ラズマで行うことを特徴とする半導体装置の作製方法。 - 請求項1において、
前記ゲート絶縁層、前記第1の酸化物半導体層、前記第2の酸化物半導体層、前記ソース電極層及び前記ドレイン電極層をスパッタリング法で形成することを特徴とする半導体装置の作製方法。 - 請求項1において、
前記ゲート絶縁層、前記第1の酸化物半導体層、前記第2の酸化物半導体層、前記ソース電極層及び前記ドレイン電極層の各層をスパッタリング法で大気に触れさせることなく連続して形成することを特徴とする半導体装置の作製方法。
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| JP2014092255A Division JP2014158049A (ja) | 2014-04-28 | 2014-04-28 | 半導体装置 |
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| Publication Number | Publication Date |
|---|---|
| JP2010062229A JP2010062229A (ja) | 2010-03-18 |
| JP2010062229A5 JP2010062229A5 (ja) | 2011-09-29 |
| JP5537787B2 true JP5537787B2 (ja) | 2014-07-02 |
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Families Citing this family (74)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102256492B1 (ko) | 2009-06-30 | 2021-05-26 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 반도체 장치 제조 방법 |
| KR101610606B1 (ko) | 2009-07-03 | 2016-04-07 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 반도체 장치의 제작 방법 |
| CN104835850B (zh) | 2009-07-10 | 2018-10-26 | 株式会社半导体能源研究所 | 半导体器件 |
| KR101342179B1 (ko) | 2009-09-24 | 2013-12-16 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 반도체 소자 및 그 제조 방법 |
| KR20120084751A (ko) | 2009-10-05 | 2012-07-30 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 반도체 장치 및 그 제작 방법 |
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