JP2005340721A - 高誘電率誘電体膜を堆積する方法 - Google Patents
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Abstract
【選択図】 図2
Description
第1の技術において、化学的プリカーサー、好ましくは金属有機複合物がプラズマまたは熱的エネルギによって分解され、そして適当なガスと反応して、望ましいより高い誘電率を有する誘電体物質を作る。この技術は通常MO−CVD技術と呼ばれている。
第2の方法において、2つの化学的媒介物が基板に対して導入され、それは各ガス導入の間でタイムブレークを交互に作りながら導入される。当該タイムブレークの間、第1に導入されたガスは基板の表面に吸収された分子を除いて排気される。第2の媒介物が導入されるとき、それは当該表面に吸収された第1ガスの分子と反応し、誘電体膜を形成する。それから、残存する過剰なガスは、次のガス投入に至るまでのタイムブレークの間に排気される。この技術は、原子層堆積(ALD)技術と呼ばれている。
[実施形態1]
(2): 当該ウェハーを乾燥する(ステップS1)。
(3): 反応性スパッタリング技術によってウェハー上にHfN膜を堆積する(ステップS2)。
(4): 約1%の含有率で酸素を含むほとんどが不活性ガスまたはN2である環境で400℃を越える高い温度でウェハーをアニールする(ステップS3)。
Arガス流速 20sccm
N2ガス流速 6sccm
DC電力 300W
成膜速度 2.4nm/分
成膜時間 12.5秒
HfN膜厚み 0.5nm
HfN膜抵抗値 516μ/Ωcm
HfN膜均一性 0.95%(1σ)
[実施形態2]
(2): ウェハーを乾燥する。
(3): NH3のガス雰囲気で500℃を越えて熱アニ−ルする。
(4): 反応性スパッタリング技術においてHfNを堆積する。
(5): 約1%の含有率の酸素を含むほとんどが不活性ガスまたはN2の雰囲気において400℃を越えるより高い温度でウェハーをアニールする。
[実施形態3]
(2): ウェハーを乾燥する。
(3): CVDまたはRTPプロセスによって下地層と呼ばれるSiO2またはSiONまたはSi3N4の非常に薄い層を堆積する。
(4): 反応性スパッタリング技術によってHfNを堆積する。
(5): 約1%の含有率の酸素を含むほとんどが不活性ガスまたはN2の雰囲気において400℃を越えるより高い温度でウェハーをアニールする。
11 ウェハーホルダ
12 ターゲット
19 マグネット配列
22 ウェハー
Claims (9)
- 基板のドープシリコン層またはドープシリコン化合物層に高誘電率誘電体膜を堆積する方法であり、
特定元素(A)を窒化して前記シリコン層上に窒化膜(AxNy)を形成する第1ステップであって、前記窒化膜(AxNy)で前記特定元素(A)と前記窒素(N)との間でxとyは所定割合の関係を有する前記第1ステップと、
前記窒化膜を酸素雰囲気で酸化し、酸化かつ窒化された前記誘電体膜(AON)を形成する第2ステップ、
を含む高誘電率誘電体膜を堆積する方法。 - 前記特定元素は、元素周期表の3族、4族、または5族に属するいずれかの元素である請求項1記載の高誘電率誘電体膜を堆積する方法。
- 前記窒化膜(AxNy)における前記特定元素(A)と前記窒素(N)は、yがそのストチオメトリック値(stochiometric value)よりも小さいという関係を有する請求項1記載の高誘電率誘電体膜を堆積する方法。
- 前記特定元素(A)はハフニウム(Hf)である請求項2記載の高誘電率誘電体膜を堆積する方法。
- 前記窒化膜(HfxNy)で前記ハフニウム(Hf)と前記窒素(N)はx=1に対して0<y<1.5の関係を有する請求項4記載の高誘電率誘電体膜を堆積する方法。
- 前記第2ステップでの酸化プロセスは400〜1000℃の温度範囲に含まれる特定温度で熱的アニールプロセスによって実行される請求項1〜5のいずれか1項に記載の高誘電率誘電体膜を堆積する方法。
- 膜堆積のために反応性スパッタリング法が用いられる請求項1〜6のいずれか1項に記載の高誘電率誘電体膜を堆積する方法。
- 前記シリコン層上にSiO2層、SiN層、およびSiON層のいずれかが設けられ、前記第2ステップで他の高誘電率誘電体膜(AON)が堆積する請求項1記載の高誘電率誘電体膜を堆積する方法。
- 前記第1ステップでの窒化プロセスのために供給される窒素ガス(N2)の流速は1〜15sccmの範囲に含まれるいずれかの値である請求項1記載の高誘電率誘電体膜を堆積する方法。
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JP2004160928A JP2005340721A (ja) | 2004-05-31 | 2004-05-31 | 高誘電率誘電体膜を堆積する方法 |
US11/141,044 US7816283B2 (en) | 2004-05-31 | 2005-06-01 | Method of depositing a higher permittivity dielectric film |
US12/419,320 US20090218217A1 (en) | 2004-05-31 | 2009-04-07 | Sputtering apparatus for depositing a higher permittivity dielectric film |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2011029478A (ja) * | 2009-07-28 | 2011-02-10 | Canon Anelva Corp | 誘電体膜、誘電体膜を用いた半導体装置の製造方法及び半導体製造装置 |
US10378100B2 (en) | 2008-06-25 | 2019-08-13 | Canon Anelva Corporation | Sputtering apparatus and recording medium for recording control program thereof |
JP2021107916A (ja) * | 2019-12-23 | 2021-07-29 | アイメック・ヴェーゼットウェーImec Vzw | Euvlペリクルを形成する方法 |
WO2022190817A1 (ja) * | 2021-03-11 | 2022-09-15 | 国立大学法人東京工業大学 | 強誘電性薄膜の形成方法、それを備える半導体装置 |
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US8097300B2 (en) * | 2006-03-31 | 2012-01-17 | Tokyo Electron Limited | Method of forming mixed rare earth oxynitride and aluminum oxynitride films by atomic layer deposition |
US8012442B2 (en) * | 2006-03-31 | 2011-09-06 | Tokyo Electron Limited | Method of forming mixed rare earth nitride and aluminum nitride films by atomic layer deposition |
US7767262B2 (en) * | 2006-09-29 | 2010-08-03 | Tokyo Electron Limited | Nitrogen profile engineering in nitrided high dielectric constant films |
US20080079111A1 (en) * | 2006-09-29 | 2008-04-03 | Tokyo Electron Limited | Semiconductor devices containing nitrided high dielectric constant films |
WO2008042695A2 (en) * | 2006-09-29 | 2008-04-10 | Tokyo Electron Limited | Semiconductor devices containing nitrided high dielectric constant films and method of forming |
WO2009031232A1 (ja) * | 2007-09-07 | 2009-03-12 | Canon Anelva Corporation | スパッタリング方法および装置 |
US8076241B2 (en) * | 2009-09-30 | 2011-12-13 | Tokyo Electron Limited | Methods for multi-step copper plating on a continuous ruthenium film in recessed features |
US20120313186A1 (en) * | 2011-06-08 | 2012-12-13 | Taiwan Semiconductor Manufacturing Company, Ltd. | Polysilicon gate with nitrogen doped high-k dielectric and silicon dioxide |
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-
2004
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-
2005
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2009
- 2009-04-07 US US12/419,320 patent/US20090218217A1/en not_active Abandoned
Cited By (4)
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US10378100B2 (en) | 2008-06-25 | 2019-08-13 | Canon Anelva Corporation | Sputtering apparatus and recording medium for recording control program thereof |
JP2011029478A (ja) * | 2009-07-28 | 2011-02-10 | Canon Anelva Corp | 誘電体膜、誘電体膜を用いた半導体装置の製造方法及び半導体製造装置 |
JP2021107916A (ja) * | 2019-12-23 | 2021-07-29 | アイメック・ヴェーゼットウェーImec Vzw | Euvlペリクルを形成する方法 |
WO2022190817A1 (ja) * | 2021-03-11 | 2022-09-15 | 国立大学法人東京工業大学 | 強誘電性薄膜の形成方法、それを備える半導体装置 |
Also Published As
Publication number | Publication date |
---|---|
US7816283B2 (en) | 2010-10-19 |
US20050272196A1 (en) | 2005-12-08 |
US20090218217A1 (en) | 2009-09-03 |
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