JP2010186994A - 半導体装置およびその作製方法 - Google Patents
半導体装置およびその作製方法 Download PDFInfo
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- JP2010186994A JP2010186994A JP2010004758A JP2010004758A JP2010186994A JP 2010186994 A JP2010186994 A JP 2010186994A JP 2010004758 A JP2010004758 A JP 2010004758A JP 2010004758 A JP2010004758 A JP 2010004758A JP 2010186994 A JP2010186994 A JP 2010186994A
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- Prior art keywords
- oxide semiconductor
- layer
- semiconductor layer
- film
- gate electrode
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 15
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- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
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- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
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- 238000007254 oxidation reaction Methods 0.000 description 2
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 2
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- 230000002441 reversible effect Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
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- 238000001771 vacuum deposition Methods 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 2
- 229910017073 AlLi Inorganic materials 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
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- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910020994 Sn-Zn Inorganic materials 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 229910009069 Sn—Zn Inorganic materials 0.000 description 1
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- 229910052796 boron Inorganic materials 0.000 description 1
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- 238000005094 computer simulation Methods 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
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- 230000005283 ground state 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
- 230000005525 hole transport Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
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- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
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- 238000002844 melting Methods 0.000 description 1
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- AHLBNYSZXLDEJQ-FWEHEUNISA-N orlistat Chemical compound CCCCCCCCCCC[C@H](OC(=O)[C@H](CC(C)C)NC=O)C[C@@H]1OC(=O)[C@H]1CCCCCC AHLBNYSZXLDEJQ-FWEHEUNISA-N 0.000 description 1
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- 238000005215 recombination Methods 0.000 description 1
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- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- 230000001360 synchronised effect Effects 0.000 description 1
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- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances 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
- OYQCBJZGELKKPM-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O-2].[Zn+2].[O-2].[In+3] OYQCBJZGELKKPM-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/08—Oxides
- C23C14/086—Oxides of zinc, germanium, cadmium, indium, tin, thallium or bismuth
-
- 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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/02521—Materials
- H01L21/02551—Group 12/16 materials
- H01L21/02554—Oxides
-
- 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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/02521—Materials
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Abstract
【解決手段】絶縁物(絶縁性酸化物、絶縁性窒化物、若しくは酸窒化シリコン、酸窒化アルミニウムなど)、代表的にはSiO2を含む酸化物半導体ターゲットを用いて成膜を行い、酸化物半導体層の膜厚方向におけるSi元素濃度が、ゲート電極に近い側からゲート電極に遠い側に増加する濃度勾配を有する半導体装置を実現する。
【選択図】図1
Description
本実施の形態では、SiOxを含む酸化物半導体層を用いた薄膜トランジスタの一例について図1(A)及び図1(B)を用いて説明する。
本実施の形態では、酸化シリコン、酸化ゲルマニウム、酸化アルミニウムなどに代表される絶縁性酸化物、窒化シリコン、窒化アルミニウムなどに代表される絶縁性窒化物、若しくは酸窒化シリコン、酸窒化アルミニウムなどの絶縁性酸窒化物などの絶縁物を微量に含む酸化物半導体層を用いた薄膜トランジスタの一例について図2(A)及び図2(B)を用いて説明する。
本実施の形態では、マスク数を低減するため、多階調マスクを用いた露光を行う例を示す。
本実施の形態では、チャネルストップ型の薄膜トランジスタ430の一例について図13(A)及び図13(B)を用いて説明する。また、図13(B)は薄膜トランジスタの上面図の一例であり、図中Z1―Z2の鎖線で切断した断面図が図13(A)に相当する。また、薄膜トランジスタ430の酸化物半導体層にインジウムを含まない酸化物半導体材料を用いる例を示す。
本実施の形態では、2つのnチャネル型の薄膜トランジスタ760、761を用いてインバータ回路を構成する例を説明する。また、薄膜トランジスタ760、761の酸化物半導体層にガリウムを含まない酸化物半導体材料を用いる例を示す。
本実施の形態では、トップゲート型の薄膜トランジスタ330の一例について図16(A)及び図16(B)を用いて説明する。また、図16(B)は薄膜トランジスタの上面図の一例であり、図中P1―P2の鎖線で切断した断面図が図16(A)に相当する。
本実施の形態では、トップゲート型の薄膜トランジスタ630の一例について図17(A)及び図17(B)を用いて説明する。また、図17(B)は薄膜トランジスタの上面図の一例であり、図中R1―R2の鎖線で切断した断面図が図17(A)に相当する。
本実施の形態では、半導体装置として発光表示装置の一例を示す。表示装置の有する表示素子としては、ここではエレクトロルミネッセンスを利用する発光素子を用いて示す。エレクトロルミネッセンスを利用する発光素子は、発光材料が有機化合物であるか、無機化合物であるかによって区別され、前者は有機EL素子、後者は無機EL素子と呼ばれている。
本実施の形態では、半導体装置として電子ペーパーの一例を示す。
酸化物半導体層を用いた薄膜トランジスタを含む半導体装置は、さまざまな電子機器(遊技機も含む)に適用することができる。電子機器としては、例えば、テレビジョン装置(テレビ、またはテレビジョン受信機ともいう)、コンピュータ用などのモニタ、デジタルカメラ、デジタルビデオカメラ、デジタルフォトフレーム、携帯電話機(携帯電話、携帯電話装置ともいう)、携帯型ゲーム機、携帯情報端末、音響再生装置、パチンコ機などの大型ゲーム機などが挙げられる。
101:ゲート電極層
102:ゲート絶縁層
103:SiOxを含む酸化物半導体層103
105a、105b:ソース電極層又はドレイン電極層
106:保護絶縁層
190:薄膜トランジスタ
193:第1の酸化物半導体層
Claims (10)
- 絶縁表面上にゲート電極と、
少なくとも亜鉛及びSiOxを含む酸化物半導体層と、
前記ゲート電極と前記酸化物半導体層の間に絶縁層とを有し、
前記酸化物半導体層の膜厚方向におけるSi元素濃度は、前記ゲート電極に近い側から前記ゲート電極に遠い側に増加する濃度勾配を有する半導体装置。 - 請求項1において、前記酸化物半導体層の膜厚方向におけるSi元素濃度は段階的に変化することを特徴とする半導体装置。
- 請求項1または請求項2において、前記酸化物半導体層の膜厚方向におけるSi元素濃度は連続的に変化することを特徴とする半導体装置。
- 請求項1乃至3のいずれか一において、前記酸化物半導体層はインジウムを含むことを特徴とする半導体装置。
- 請求項1乃至4のいずれか一において、前記酸化物半導体層はガリウムを含むことを特徴とする半導体装置。
- 請求項1乃至5のいずれか一において、前記酸化物半導体層は、単層であることを特徴とする半導体装置。
- 請求項1乃至5のいずれか一において、前記酸化物半導体層は、積層であることを特徴とする半導体装置。
- 請求項1乃至7のいずれか一において、前記酸化物半導体層は、SiO2を0.1重量%以上10重量%以下含む酸化物半導体ターゲットを用いたスパッタ法で形成されることを特徴とする半導体装置。
- 絶縁表面上にゲート電極を形成し、
前記ゲート電極上に絶縁層を形成し、
前記絶縁層上に第1の酸化物半導体ターゲットを用いたスパッタ法で成膜した後、SiO2を0.1重量%以上10重量%以下含む第2の酸化物半導体ターゲットを用いたスパッタ法で成膜し、膜厚方向におけるSi元素濃度が前記ゲート電極に近い側から前記ゲート電極に遠い側に増加する酸化物半導体層を形成することを特徴とする半導体装置の作製方法。 - 絶縁表面上にSiO2を0.1重量%以上10重量%以下含む第1の酸化物半導体ターゲットを用いたスパッタ法で成膜した後、第2の酸化物半導体ターゲットを用いたスパッタ法で成膜し、膜厚方向におけるSi元素が濃度勾配を有する酸化物半導体層を形成し、
前記酸化物半導体層を覆う絶縁層を形成し、
前記絶縁層上にゲート電極を形成し、
前記酸化物半導体層は、膜厚方向におけるSi元素が前記ゲート電極に近い側から前記ゲート電極に遠い側に増加することを特徴とする半導体装置の作製方法。
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US8629432B2 (en) | 2014-01-14 |
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JP5816330B2 (ja) | 2015-11-18 |
KR20100084466A (ko) | 2010-07-26 |
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US8884287B2 (en) | 2014-11-11 |
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