JP7623082B2 - カーボン膜の成膜方法及び成膜装置 - Google Patents
カーボン膜の成膜方法及び成膜装置 Download PDFInfo
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Description
図1は本開示の実施形態に係る成膜装置の一例を概略的に示す断面図である。
室Sに供給され、拡散されたガスは、処理室Sの下方から処理室Sの上方へと流れて、環状空間104に吸引される。環状空間104の、例えば、下端部には排気管106が接続されており、排気管106は、排気装置107に接続されている。排気装置107は真空ポンプ等を含んで構成され、処理室Sを排気し、また、処理室Sの内部の圧力を処理に適切な圧力となるように調節する。
CnH2n+2
CmH2m
CmH2m-2
の少なくとも一つの分子式で表わされる炭化水素を含むガスを挙げることができる(ただし、nは1以上の自然数、mは2以上の自然数)。
ベンゼンガス(C6H6)
が含まれていてもよい。
メタンガス(CH4)
エタンガス(C2H6)
プロパンガス(C3H8)
ブタンガス(C4H10:他の異性体も含む)
ペンタンガス(C5H12:他の異性体も含む)
などを挙げることができる。
エチレンガス(C2H4)
プロピレンガス(C3H6:他の異性体も含む)
ブチレンガス(C4H8:他の異性体も含む)
ペンテンガス(C5H10:他の異性体も含む)
などを挙げることができる。
アセチレンガス(C2H2)
プロピンガス(C3H4:他の異性体も含む)
ブタジエンガス(C4H6:他の異性体も含む)
イソプレンガス(C5H8:他の異性体も含む)
などを挙げることができる。
次に、図1の成膜装置により実施される、本発明のカーボン膜の成膜方法の一実施形態について説明する。
このように、本実施形態に係るカーボン膜の成膜方法によれば、カーボン膜50内の塩素濃度を低減させ、カーボン膜50の成膜レート及び品質を向上させることができる。
図8に示した本実施形態に係るカーボン膜の成膜方法を、カーボン膜堆積工程及び塩素反応ガス供給工程の時間及び繰り返し回数を種々設定して実施した。以下、実施例について説明する。
20 シリコン酸化膜
30 アモルファスシリコン膜
40 シード層
50 カーボン膜
100 成膜装置
107 排気装置
112 ウエハボート
130 処理ガス供給機構
131a 炭素含有ガス供給源
131b 熱分解温度降下ガス供給源
131e シードガス供給源
150 制御部
S 処理室
W 半導体ウエハ
Claims (12)
- ボロン含有ガスを供給してボロン系のシード層を基板上に形成する工程と、
炭素含有ガス及びハロゲンガスを基板に供給し、化学気相成長によりカーボン膜を堆積させる工程と、
前記ハロゲンガスを構成するハロゲンと反応するガスを供給し、前記カーボン膜内に含まれる前記ハロゲンを減少させる工程と、を有し、
前記ボロン系のシード層を基板上に形成する工程を行った後に、当該ボロン系のシード層を形成する工程を省いて前記カーボン膜を堆積させる工程と、前記ハロゲンを減少させる工程とを1サイクルとして、複数サイクル繰り返すカーボン膜の成膜方法。 - 前記ハロゲンガスと反応するガスはアンモニアガスである請求項1に記載のカーボン膜の成膜方法。
- 前記複数サイクルは、5サイクル以上である請求項1又は2に記載のカーボン膜の成膜方法。
- 前記基板上にカーボン膜を堆積させる工程及び前記ハロゲンを減少させる工程は、400℃以下の温度下で行われる請求項1~3のいずれか一項に記載のカーボン膜の成膜方法。
- 前記ハロゲンガスは、塩素ガス、フッ素ガス、臭素ガス、ヨウ素ガスのいずれかである請求項1~4のいずれか一項に記載のカーボン膜の成膜方法。
- 前記炭素含有ガスは、炭化水素系ガスである請求項1~5のいずれか一項に記載のカーボン膜の成膜方法。
- 前記炭化水素系ガスは、C4H6ガスである請求項6に記載のカーボン膜の成膜方法。
- 前記カーボン膜を堆積させる工程と前記ハロゲンを減少させる工程との間、及び前記ハロゲンを減少させる工程と前記カーボン膜を堆積させる工程との間に、前記基板にパージガスを供給する工程を有する請求項1~7のいずれか一項に記載のカーボン膜の成膜方法。
- 前記パージガスは不活性ガスである請求項8に記載のカーボン膜の成膜方法。
- 前記不活性ガスは窒素ガスである請求項9に記載のカーボン膜の成膜方法。
- 前記パージガスを供給する工程は、前記基板が設けられた処理室内を真空排気しながら行う請求項8~10のいずれか一項に記載のカーボン膜の成膜方法。
- 処理室と、
前記処理室内に設けられた基板保持具と、
前記基板保持具に保持された基板にボロン含有ガス、炭素含有ガス及びハロゲンガスを供給する処理ガス供給部と、
前記ハロゲンガスを構成するハロゲンと反応するガスを供給するハロゲン反応ガス供給部と、
制御部と、を有し、
前記制御部は、
前記ボロン含有ガスを供給してボロン系のシード層を前記基板上に形成する工程と、
前記炭素含有ガス及び前記ハロゲンガスを前記基板に供給し、化学気相成長によりカーボン膜を堆積させる工程と、
前記ハロゲンガスを構成するハロゲンと反応するガスを供給し、前記カーボン膜内に含まれる前記ハロゲンを減少させる工程と、を制御し、
前記ボロン系のシード層を基板上に形成する工程を行った後に、当該ボロン系のシード層を形成する工程を省いて前記カーボン膜を堆積させる工程と、前記ハロゲンを減少させる工程とを1サイクルとして、複数サイクル繰り返す成膜装置。
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| US17/647,996 US12217956B2 (en) | 2021-02-04 | 2022-01-14 | Carbon film deposition method and deposition apparatus |
| KR1020220009090A KR20220112677A (ko) | 2021-02-04 | 2022-01-21 | 카본막의 성막 방법 및 성막 장치 |
| TW111103258A TW202235656A (zh) | 2021-02-04 | 2022-01-26 | 碳膜之成膜方法及成膜裝置 |
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| JP7838893B2 (ja) * | 2022-02-03 | 2026-04-01 | 東京エレクトロン株式会社 | 成膜方法及び成膜装置 |
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| CN114855150B (zh) | 2026-02-13 |
| JP2022119573A (ja) | 2022-08-17 |
| KR20220112677A (ko) | 2022-08-11 |
| TW202235656A (zh) | 2022-09-16 |
| US12217956B2 (en) | 2025-02-04 |
| CN114855150A (zh) | 2022-08-05 |
| US20220246429A1 (en) | 2022-08-04 |
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