JP2014165402A - 窒化膜を形成する方法 - Google Patents
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Abstract
【解決手段】一実施形態では、処理体上に窒化膜を形成する方法が提供される。この方法は、前駆体ガスであるジクロロシランに被処理体を晒す工程(工程(a))と、工程(a)の後、アンモニアガスと水素ガスを含む処理ガスのプラズマに被処理体を晒す工程(工程(b)と、を含む。一形態においては、工程(a)と工程(b)が交互に繰り返され、工程(a)と工程(b)との間に、ジクロロシランを除去する工程(工程(c))が更に行われてもよい。
【選択図】図1
Description
(i) NH3 → N+H2+H (7.7eV),
(ii) NH3 → NH+H2 (3.9eV),
(iii) NH3 → NH2+H (4.5eV),
(iv) H+NH3 → NH2+H2 (−0.04eV),
なお、式(i)〜(iv)における括弧内のエネルギー(eV)は、それぞれの式で示される解離に必要なエネルギーである。
実験例1〜3では、ウエハWに対して方法MT1を実施した。実験例1〜3では、工程S1〜S5を200サイクル繰り返した。また、実験例1〜3ではそれぞれ、工程S3の処理時間を5秒、15秒、30秒とした。実験例1〜3の他の条件は以下に示す通りであり、共通のものとした。
DCS流量 280sccm
処理時間 5秒
処理容器内圧力 5Torr(666.6Pa)
アンモニア(NH3)ガス流量 200sccm
水素(H2)ガス流量 700sccm
処理容器内圧力 5Torr(666.6Pa)
マイクロ波パワー 4000W
また、比較のため、図16の(a)に示すように、窒化工程においてH2ガスのプラズマにウエハWを晒した後にN2ガスとH2ガスとを含む処理ガスのプラズマにウエハWを晒した点で比較実験例1〜3とは異なる比較実験例4〜7を実施した。比較実験例4〜7では、ON時のマイクロ波のパワーは4000Wとした。比較実験例4〜7では、(H2ガスのプラズマにウエハWを晒す時間T1)/(N2ガスとH2ガスとを含む処理ガスのプラズマにウエハWを晒す時間T2)をそれぞれ、0秒/30秒、10秒/20秒、20秒/10秒、0秒/10秒とした。
実験例4〜8では、ウエハWに対して方法MT1を実施した。実験例4〜8では、工程S1〜S5を200サイクル繰り返した。また、実験例4〜8では、工程S3の処理時間を30秒とし、H2ガスの流量を700sccmとした。また、実験例4〜8ではそれぞれ、工程S3におけるNH3ガスの流量を600sccm、400sccm、200sccm、100sccm、50sccmとした。実験例4〜8の他の条件は、実験例1〜3の条件と同様とした。
Claims (5)
- 被処理体上に窒化膜を形成する方法であって、
前駆体ガスであるジクロロシランに被処理体を晒す工程と、
前記ジクロロシランに晒す前記工程の後、アンモニアガスと水素ガスを含む処理ガスのプラズマに前記被処理体を晒す工程と、
を含む方法。 - 前記ジクロロシランに前記被処理体を晒す前記工程と前記処理ガスのプラズマに前記被処理体を晒す前記工程が、交互に繰り返され、
前記ジクロロシランに前記被処理体を晒す前記工程と、これに続く、前記処理ガスのプラズマに前記被処理体を晒す前記工程との間に、前記ジクロロシランを除去する工程を更に含む、
請求項1に記載の方法。 - 処理ガスのプラズマに前記被処理体を晒す工程における前記アンモニアガスの流量は、該工程における前記水素ガスの流量に対して、
前記水素ガスの流量:前記アンモニアガスの流量=7:2
で規定される流量よりも少ない、
請求項1又は2に記載の方法。 - 前記被処理体は、処理容器内において軸線中心に回転可能に設けられた載置台上に載置され、該載置台の回転に伴い前記軸線中心に前記処理容器内の第1の領域及び第2の領域を順に通過し、
前記ジクロロシランは、前記第1の領域に供給され、
前記処理ガスのプラズマは、前記第2の領域において生成される、
請求項1〜3の何れか一項に記載の方法。 - 前記処理ガスはマイクロ波によって励起される、請求項1〜4の何れか一項に記載の方法。
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JP2013036409A JP5839606B2 (ja) | 2013-02-26 | 2013-02-26 | 窒化膜を形成する方法 |
KR1020140019427A KR101661021B1 (ko) | 2013-02-26 | 2014-02-20 | 질화막을 형성하는 방법 |
TW103105991A TWI593821B (zh) | 2013-02-26 | 2014-02-24 | A method of forming a nitride film |
US14/187,404 US9245741B2 (en) | 2013-02-26 | 2014-02-24 | Method for forming nitride film using plasma process |
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JP2017117943A (ja) * | 2015-12-24 | 2017-06-29 | 東京エレクトロン株式会社 | 成膜装置 |
JP2017117941A (ja) * | 2015-12-24 | 2017-06-29 | 東京エレクトロン株式会社 | 成膜装置 |
US20170218517A1 (en) * | 2016-02-01 | 2017-08-03 | Tokyo Electron Limited | Method of forming nitride film |
JP2017139451A (ja) * | 2016-02-01 | 2017-08-10 | 東京エレクトロン株式会社 | 窒化膜の形成方法 |
JP2018010950A (ja) * | 2016-07-13 | 2018-01-18 | 東京エレクトロン株式会社 | シリコン窒化膜の成膜方法 |
JP2018137293A (ja) * | 2017-02-20 | 2018-08-30 | 東京エレクトロン株式会社 | 成膜装置 |
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Also Published As
Publication number | Publication date |
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KR20140106409A (ko) | 2014-09-03 |
TWI593821B (zh) | 2017-08-01 |
US20140242814A1 (en) | 2014-08-28 |
TW201439368A (zh) | 2014-10-16 |
JP5839606B2 (ja) | 2016-01-06 |
US9245741B2 (en) | 2016-01-26 |
KR101661021B1 (ko) | 2016-09-28 |
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