JP2015005731A - 酸化物半導体膜およびその作製方法 - Google Patents
酸化物半導体膜およびその作製方法 Download PDFInfo
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- JP2015005731A JP2015005731A JP2014101935A JP2014101935A JP2015005731A JP 2015005731 A JP2015005731 A JP 2015005731A JP 2014101935 A JP2014101935 A JP 2014101935A JP 2014101935 A JP2014101935 A JP 2014101935A JP 2015005731 A JP2015005731 A JP 2015005731A
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- film
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- oxide
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- semiconductor film
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- 238000000034 method Methods 0.000 title claims description 36
- 230000015572 biosynthetic process Effects 0.000 title description 51
- 239000000758 substrate Substances 0.000 claims abstract description 132
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- 229910052733 gallium Inorganic materials 0.000 claims abstract description 24
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 15
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000779 annular dark-field scanning transmission electron microscopy Methods 0.000 description 1
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- 230000017525 heat dissipation Effects 0.000 description 1
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- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
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- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical group [O-2].[Zn+2] RNWHGQJWIACOKP-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
- 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
- H01L21/02565—Oxide semiconducting materials not being Group 12/16 materials, e.g. ternary compounds
-
- 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
-
- 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
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/3457—Sputtering using other particles than noble gas ions
-
- 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
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
-
- 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
- H01L21/02587—Structure
- H01L21/0259—Microstructure
- H01L21/02595—Microstructure polycrystalline
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- 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
- H01L21/02612—Formation types
- H01L21/02617—Deposition types
- H01L21/02631—Physical deposition at reduced pressure, e.g. MBE, sputtering, evaporation
-
- 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
- H01L21/02656—Special treatments
- H01L21/02664—Aftertreatments
- H01L21/02667—Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth
- H01L21/02675—Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth using laser beams
- H01L21/02686—Pulsed laser beam
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Thin Film Transistor (AREA)
- Ceramic Engineering (AREA)
- Physical Vapour Deposition (AREA)
- Physical Deposition Of Substances That Are Components Of Semiconductor Devices (AREA)
- Recrystallisation Techniques (AREA)
Abstract
【解決手段】結晶性In−Ga−Zn酸化物を含むターゲットにイオンを衝突させることで、ガリウム原子、亜鉛原子および酸素原子を有する第1の層と、亜鉛原子および酸素原子を含む第2の層と、インジウム原子および酸素原子を有する第3の層と、ガリウム原子、亜鉛原子および酸素原子を有する第4の層と、が順に積み重なった平板状のIn−Ga−Zn酸化物を剥離させ、平板状のIn−Ga−Zn酸化物が、結晶性を維持したまま基板上に堆積した後、第2の層をガス化して排気する。
【選択図】図1
Description
以下では、本実施の形態に係る結晶性を有する酸化物半導体膜であるCAAC−OS(C−Axis Aligned Crystalline Oxide Semiconductor)膜について説明する。CAAC−OS膜は、a軸およびb軸の配向は不規則であるが、c軸配向性を有し、かつc軸が被形成面または上面の法線ベクトルに平行な方向を向いている酸化物半導体膜である。
以上のような性質を有する、基板上に設けられたCAAC−OS膜の模式図を図1(A)および図1(B)に示す。
このように複雑な構造が、あたかもターゲットから転写されたかのように成膜されることは、後述する成膜モデルによって説明することができる。
CAAC−OS膜は、結晶中の劈開面を利用して成膜することができる。以下では、スパッタリング法によるCAAC−OS膜の成膜モデルについて説明する。
以下では、前述したCAAC−OS膜を成膜することが可能な成膜装置について説明する。
100a ペレット
100b ペレット
103 CAAC−OS膜
103a CAAC−OS膜
103b CAAC−OS膜
120 イオン
130 領域
150 基板
150a 基板
150b 基板
160 バッキングプレート
170a マグネット
170b マグネット
170c マグネット
180 ターゲット
185 劈開面
190 磁力線
700 成膜装置
701 大気側基板供給室
702 大気側基板搬送室
703a ロードロック室
703b アンロードロック室
704 搬送室
705 基板加熱室
706a 成膜室
706b 成膜室
706c 成膜室
751 クライオトラップ
752 ステージ
761 カセットポート
762 アライメントポート
763 搬送ロボット
764 ゲートバルブ
765 加熱ステージ
766 ターゲット
767 防着板
768 基板ステージ
769 基板
770 真空ポンプ
771 クライオポンプ
772 ターボ分子ポンプ
780 マスフローコントローラ
781 精製機
782 ガス加熱機構
Claims (10)
- 基板上の酸化物半導体膜であって、
前記酸化物半導体膜は、複数の平板状の結晶性In−Ga−Zn酸化物を有し、
前記複数の平板状の結晶性In−Ga−Zn酸化物の平面が、前記基板の上面と向かい合って配置され、
透過型電子顕微鏡によって、前記複数の平板状の結晶性In−Ga−Zn酸化物間の結晶粒界が確認されないことを特徴とする酸化物半導体膜。 - 請求項1において、
前記複数の平板上の結晶性In−Ga−Zn酸化物は積み重なっていることを特徴とする酸化物半導体膜。 - 請求項1または請求項2において、
前記平板状の結晶性In−Ga−Zn酸化物の一つは、平面の円相当径が1nm以上3nm以下であることを特徴とする酸化物半導体膜。 - 請求項1乃至請求項3のいずれか一において、
前記平板状の結晶性In−Ga−Zn酸化物の一つは、厚さが0.5nm以上0.9nm以下であることを特徴とする酸化物半導体膜。 - 請求項1乃至請求項4のいずれか一において、
さらに前記平板状の結晶性In−Ga−Zn酸化物に含まれない領域を有し、前記領域は酸化亜鉛を有することを特徴とする酸化物半導体膜。 - 請求項5において、
前記領域が非晶質構造を有することを特徴とする酸化物半導体膜。 - イオンを衝突させることによって、結晶性In−Ga−Zn酸化物を含むターゲットから、第1の層と、第2の層と、第3の層と、第4の層と、が順に積み重なった平板状のIn−Ga−Zn酸化物を剥離し、
前記平板状のIn−Ga−Zn酸化物を基板上に堆積した後、前記第2の層をガス化する酸化物半導体膜の作製方法であって、
前記第1の層は、ガリウム、亜鉛、酸素を有し、
前記第2の層は、亜鉛、酸素を有し、
前記第3の層は、インジウム、酸素を有し、
前記第4の層は、ガリウム、亜鉛および酸素を有することを特徴とする酸化物半導体膜の作製方法。 - 請求項7において、
前記ターゲットに含まれる前記結晶性In−Ga−Zn酸化物の組成式がInGaZn2O5であることを特徴とする酸化物半導体膜の作製方法。 - 請求項7または請求項8において、
前記イオンが、酸素の陽イオンであることを特徴とする酸化物半導体膜の作製方法。 - 請求項7乃至請求項9のいずれか一において、
前記平板状のIn−Ga−Zn酸化物の端部にある酸素原子を、プラズマ中で負に帯電させることを特徴とする酸化物半導体膜の作製方法。
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JP6420968B2 (ja) | 2018-11-07 |
US20140346500A1 (en) | 2014-11-27 |
WO2014188983A1 (en) | 2014-11-27 |
US9824888B2 (en) | 2017-11-21 |
TW201504152A (zh) | 2015-02-01 |
KR20160009626A (ko) | 2016-01-26 |
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