JP5727204B2 - 半導体装置の作製方法 - Google Patents
半導体装置の作製方法 Download PDFInfo
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- JP5727204B2 JP5727204B2 JP2010273202A JP2010273202A JP5727204B2 JP 5727204 B2 JP5727204 B2 JP 5727204B2 JP 2010273202 A JP2010273202 A JP 2010273202A JP 2010273202 A JP2010273202 A JP 2010273202A JP 5727204 B2 JP5727204 B2 JP 5727204B2
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- 239000004065 semiconductor Substances 0.000 title claims description 291
- 238000000034 method Methods 0.000 title claims description 49
- 238000004519 manufacturing process Methods 0.000 title claims description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 241
- 125000004429 atom Chemical group 0.000 claims description 144
- 229910052757 nitrogen Inorganic materials 0.000 claims description 121
- 238000010438 heat treatment Methods 0.000 claims description 97
- 239000001257 hydrogen Substances 0.000 claims description 96
- 229910052739 hydrogen Inorganic materials 0.000 claims description 96
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 91
- 229910052760 oxygen Inorganic materials 0.000 claims description 60
- 239000001301 oxygen Substances 0.000 claims description 59
- 238000004544 sputter deposition Methods 0.000 claims description 57
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 56
- 239000007789 gas Substances 0.000 claims description 44
- 239000011701 zinc Substances 0.000 claims description 30
- 239000000126 substance Substances 0.000 claims description 24
- 229910052738 indium Inorganic materials 0.000 claims description 16
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 15
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 12
- 229910052725 zinc Inorganic materials 0.000 claims description 10
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052733 gallium Inorganic materials 0.000 claims description 6
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 2
- 239000010410 layer Substances 0.000 description 392
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 40
- 239000000463 material Substances 0.000 description 32
- 239000010936 titanium Substances 0.000 description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 28
- 229910052814 silicon oxide Inorganic materials 0.000 description 27
- 239000012298 atmosphere Substances 0.000 description 25
- 229910052719 titanium Inorganic materials 0.000 description 25
- 239000011521 glass Substances 0.000 description 21
- 229910052751 metal Inorganic materials 0.000 description 20
- 239000002184 metal Substances 0.000 description 20
- 239000011787 zinc oxide Substances 0.000 description 20
- 238000000151 deposition Methods 0.000 description 19
- 230000008021 deposition Effects 0.000 description 19
- 229910005191 Ga 2 O 3 Inorganic materials 0.000 description 18
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 18
- 230000001603 reducing effect Effects 0.000 description 18
- 229910052782 aluminium Inorganic materials 0.000 description 16
- 239000011241 protective layer Substances 0.000 description 16
- 229910007541 Zn O Inorganic materials 0.000 description 15
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- 238000004868 gas analysis Methods 0.000 description 11
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 9
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 9
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
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- 229910052727 yttrium Inorganic materials 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
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- 238000005530 etching Methods 0.000 description 5
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- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 150000004678 hydrides Chemical class 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 229920001721 polyimide Polymers 0.000 description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
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- 229910052718 tin Inorganic materials 0.000 description 4
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 4
- 229910002601 GaN Inorganic materials 0.000 description 3
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 3
- 229910000846 In alloy Inorganic materials 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910000807 Ga alloy Inorganic materials 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 229910001297 Zn alloy Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
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- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910003437 indium oxide Inorganic materials 0.000 description 2
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
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- 230000000704 physical effect Effects 0.000 description 2
- 238000005546 reactive sputtering Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- 229910001887 tin oxide Inorganic materials 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229910018125 Al-Si Inorganic materials 0.000 description 1
- 229910018520 Al—Si Inorganic materials 0.000 description 1
- 229910018575 Al—Ti Inorganic materials 0.000 description 1
- 229910002482 Cu–Ni Inorganic materials 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910020923 Sn-O Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 229910000946 Y alloy Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- -1 and at the same time Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 238000004364 calculation method Methods 0.000 description 1
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- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000007872 degassing Methods 0.000 description 1
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- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
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- 238000005401 electroluminescence Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
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- 150000002500 ions Chemical class 0.000 description 1
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- 238000010030 laminating Methods 0.000 description 1
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- 150000004767 nitrides Chemical class 0.000 description 1
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- 238000005477 sputtering target Methods 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/7869—Thin film transistors, i.e. transistors with a channel being at least partly a thin film having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/324—Thermal treatment for modifying the properties of semiconductor bodies, e.g. annealing, sintering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/124—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/24—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only semiconductor materials not provided for in groups H01L29/16, H01L29/18, H01L29/20, H01L29/22
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Thin Film Transistor (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
半導体装置の作製方法の一例について説明する。
本実施の形態では実施の形態1と異なる構造のトランジスタを有する半導体装置について説明する。
図4(A)に示す半導体装置の作製方法の一例を示す。
図4(C)に示す半導体装置の作製方法の一例を示す。
半導体装置としては、各種集積回路がある。
スパッタガスの流量がAr/N2=40/0sccm(N2割合0%)のサンプルをサンプル1とした。なお、サンプル1は3つ用意した。
スパッタガスの流量がAr/N2=35/5sccm(N2割合12.5%)のサンプルをサンプル2とした。なお、サンプル2は3つ用意した。
スパッタガスの流量がAr/N2=0/40sccm(N2割合100%)のサンプルをサンプル3とした。なお、サンプル3は3つ用意した。
図10〜図12において、点線3001が加熱処理を行っていないサンプル(as−depo)、太い実線3002が窒素雰囲気で加熱したサンプル(N2ベーク)、細い実線3003が大気雰囲気で加熱したサンプル(大気ベーク)を示している。
スパッタガスの流量がAr/O2=30/15sccm(O2割合33.3%)のサンプルをサンプル4(as−depo)とした。
スパッタガスの流量がAr/O2=0/40sccm(O2割合100%)のサンプルをサンプル5(as−depo)とした。
SIMSの測定結果の有効範囲は実施例1と同じである。
図2(B)に記載のチャネルエッチ型トランジスタを作製した。
絶縁層600は、酸化珪素ターゲットを用いてスパッタ法で形成した。
絶縁層600は、酸化珪素ターゲットを用いてスパッタ法で形成した。
絶縁層600は、酸化珪素ターゲットを用いてスパッタ法で形成した。
絶縁層600は、プラズマCVD法で形成した。
絶縁層600は、プラズマCVD法で形成した。
絶縁層600は、シロキサン膜を用いた。
絶縁層600は、アクリル膜を用いた。
絶縁層600は、ポリイミド膜を用いた。
サンプル8乃至サンプル13は、サンプル6及びサンプル7と比較して、閾値電圧Vthがマイナス側にシフトしていた。
サンプル14としてガラス基板を用意した。
サンプル15として、ガラス基板上にIn:Ga:Znが1:1:0.5(原子比)(In2O3:Ga2O3:ZnOが1:1:1(モル比))の酸化物半導体ターゲットをスパッタして形成した酸化物半導体層を形成したサンプルを用意した。
サンプル15と同一のサンプルをもう一つ用意し、サンプル16とした。
サンプル17として、ガラス基板上にIn:Ga:Znが1:1:0.5(原子比)(In2O3:Ga2O3:ZnOが1:1:1(モル比))の酸化物半導体ターゲットをスパッタして形成した酸化物半導体層を形成したサンプルを用意した。
サンプル18として、ガラス基板上にIn:Ga:Znが1:1:0.5(原子比)(In2O3:Ga2O3:ZnOが1:1:1(モル比))の酸化物半導体ターゲットをスパッタして形成した酸化物半導体層を形成したサンプルを用意した。
サンプル19として、ガラス基板上にIn:Ga:Znが1:1:0.5(原子比)(In2O3:Ga2O3:ZnOが1:1:1(モル比))の酸化物半導体ターゲットをスパッタして形成した酸化物半導体層を形成したサンプルを用意した。
サンプル14及びサンプル15との昇温脱離ガス分析法の結果を図14(A)に示す。
また、サンプル20として、ガラス基板上にIn:Ga:Znが1:1:0.5(原子比)(In2O3:Ga2O3:ZnOが1:1:1(モル比))の酸化物半導体ターゲットをスパッタして形成した酸化物半導体層を形成したサンプルを用意した。
ガラス基板上にIn:Ga:Znが1:1:0.5(原子比)(In2O3:Ga2O3:ZnOが1:1:1(モル比))の酸化物半導体ターゲットをスパッタして形成した酸化物半導体層を形成し、酸化物半導体層上にスパッタ法で形成した酸化珪素膜を形成したサンプルを用意した。
ガラス基板上にIn:Ga:Znが1:1:0.5(原子比)(In2O3:Ga2O3:ZnOが1:1:1(モル比))の酸化物半導体ターゲットをスパッタして形成した酸化物半導体層を形成し、酸化物半導体層上にスパッタ法で形成した酸化珪素膜を形成したサンプルを用意した。
ガラス基板上にIn:Ga:Znが1:1:0.5(原子比)(In2O3:Ga2O3:ZnOが1:1:1(モル比))の酸化物半導体ターゲットをスパッタして形成した酸化物半導体層を形成し、酸化物半導体層上にスパッタ法で形成した酸化珪素膜を形成したサンプルを用意した。
ガラス基板上にIn:Ga:Znが1:1:0.5(原子比)(In2O3:Ga2O3:ZnOが1:1:1(モル比))の酸化物半導体ターゲットをスパッタして形成した酸化物半導体層を形成し、酸化物半導体層上にスパッタ法で形成した酸化珪素膜を形成したサンプルを用意した。
昇温脱離ガス分析法(TDS:Thermal Desorption Spectroscopy)で計測したところ、いずれのサンプルも300℃付近の水分のピークが観測されなかった。
200 ゲート電極
300 ゲート絶縁層
400 酸化物半導体層
410 酸化物半導体層
500 導電層
510 コンタクト電極
520 コンタクト電極
600 絶縁層
700 チャネル保護層
810 配線
820 配線
830 配線
900 下地絶縁層
1401 ピーク
1402 ピーク
1403 ピーク
1414 グラフ
1415 グラフ
1416 グラフ
1417 グラフ
1418 グラフ
1419 グラフ
1601 酸化物半導体層
1602 インジウムリッチ層
1603 チタン酸化物層
1604 チタン層
2001 成膜室
2002 蓋
2003 ターゲット
2004 ポンプ
2005 Oリング
2006 Oリング
2007 メタルガスケット
2008 メタルガスケット
3001 点線
3002 太い実線
3003 細い実線
8000 破線
Claims (2)
- ゲート電極と、酸化物半導体層と、前記ゲート電極と前記酸化物半導体層との間に挟まれたゲート絶縁層と、を有する半導体装置の作製方法であって、
窒素濃度が1×1020atoms/cm3以下である前記酸化物半導体層を350℃以上且つ1時間以上で加熱処理を行い、水素を低減し、
前記酸化物半導体層は、インジウム、ガリウム、及び亜鉛を有することを特徴とする半導体装置の作製方法。 - ゲート電極と、酸化物半導体層と、前記ゲート電極と前記酸化物半導体層との間に挟まれたゲート絶縁層と、前記酸化物半導体層に接して設けられた絶縁層と、を有する半導体装置の作製方法であって、
窒素濃度が1×10 20 atoms/cm 3 以下である前記酸化物半導体層を350℃以上且つ1時間以上で第1の加熱処理を行い、水素を低減し、
前記絶縁層は、スパッタガスとして水素を含む物質を用いずに形成され、
前記絶縁層は、第2の加熱処理により、前記酸化物半導体層に酸素を供給し、
前記酸化物半導体層は、インジウム、ガリウム、及び亜鉛を有することを特徴とする半導体装置の作製方法。
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