JP7109397B2 - 成膜方法 - Google Patents
成膜方法 Download PDFInfo
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- JP7109397B2 JP7109397B2 JP2019046077A JP2019046077A JP7109397B2 JP 7109397 B2 JP7109397 B2 JP 7109397B2 JP 2019046077 A JP2019046077 A JP 2019046077A JP 2019046077 A JP2019046077 A JP 2019046077A JP 7109397 B2 JP7109397 B2 JP 7109397B2
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Description
図1は、本開示の一実施形態における成膜システム100の一例を示す模式図である。成膜システム100は、プラズマ処理装置200、SAM供給装置300、成膜装置400、および酸化装置500を有する。これら装置は、平面形状が七角形をなす真空搬送室101の4つの側壁にそれぞれゲートバルブGを介して接続されている。成膜システム100は、マルチチャンバータイプの真空処理システムである。真空搬送室101内は、真空ポンプにより排気されて所定の真空度に保たれている。成膜システム100は、プラズマ処理装置200、SAM供給装置300、成膜装置400、および酸化装置500を用いて、表面に金属膜および絶縁膜が露出している基板Wの絶縁膜にチタン窒化膜を選択的に成膜することができる。
図2は、本開示の一実施形態における成膜方法の一例を示すフローチャートである。本実施形態では、例えば図1に示された成膜システム100により、表面に金属膜および絶縁膜が露出している基板Wにおいて、金属膜上に選択的にチタン窒化膜が成膜される。図2のフローチャートに示された成膜方法は、制御装置110が成膜システム100の各部を制御することによって実現される。以下では、本開示の一実施形態における成膜方法の一例を、図3~図8を参照しながら説明する。
基板Wの温度:100~450℃
圧力:1~10Torr
水素ガスの流量:100~2000sccm
RFの周波数:450kHz~13.56MHz
RFの電力:100~500W
処理時間:10~300秒
基板Wの温度:100~250℃(好ましくは120℃)
圧力:1~100Torr(好ましくは20Torr)
有機化合物のガスの流量:50~500sccm(例えば100sccm)
処理時間:10~300秒(例えば180秒)
基板Wの温度:100~250℃(好ましくは200℃)
圧力:1~10Torr(好ましくは3Torr)
原料ガスの流量:10~500sccm
処理時間:0.3~10秒
基板Wの温度:100~250℃(好ましくは200℃)
圧力:1~10Torr(好ましくは3Torr)
不活性ガスの流量:1000~6000sccm
処理時間:3~30秒
基板Wの温度:100~250℃(好ましくは200℃)
圧力:1~10Torr(好ましくは3Torr)
NH3ガスの流量:100~2000sccm(例えば1000sccm)
処理時間:0.3~10秒
基板Wの温度:120~350℃(好ましくは200℃)
圧力:0.5~10Torr(好ましくは1Torr)
酸化ガスの流量:10~1000sccm
処理時間:1~60秒(例えば30秒)
基板Wの温度:120~250℃(好ましくは200℃)
圧力:0.5~10Torr(好ましくは1Torr)
有機化合物のガスの流量:50~500sccm(例えば100sccm)
処理時間:1~60秒(例えば30秒)
なお、本願に開示された技術は、上記した実施形態に限定されるものではなく、その要旨の範囲内で数々の変形が可能である。
G ゲートバルブ
W 基板
10 基材
11 金属膜
12 絶縁膜
13 自然酸化膜
14 SAM
15 チタン窒化膜
16 核
17 チタン酸化膜
100 成膜システム
101 真空搬送室
102 ロードロック室
103 大気搬送室
104 アライメント室
105 ポート
106 搬送機構
107 アーム
108 搬送機構
110 制御装置
200 プラズマ処理装置
300 SAM供給装置
400 成膜装置
500 酸化装置
Claims (8)
- 基板に選択的に成膜を行う成膜方法において、
表面に金属膜と絶縁膜とが露出している基板を準備する準備工程と、
前記金属膜上の自然酸化膜を除去する第1の除去工程と、
フッ素および炭素を含む官能基を有し、チタン窒化膜の成膜を抑制する自己組織化単分子膜を成膜するための化合物を前記基板上に供給することにより、前記絶縁膜上に前記自己組織化単分子膜を成膜する第1の成膜工程と、
前記金属膜上にチタン窒化膜を成膜する第2の成膜工程と、
前記基板の表面を酸化する酸化工程と、
前記基板の表面に前記化合物を供給することにより、前記金属膜上および前記自己組織化単分子膜上に形成されたチタン酸化膜を除去する第2の除去工程と
を含む成膜方法。 - 前記化合物は、前記絶縁膜の表面に吸着する結合性官能基と、フッ素および炭素を含む機能性官能基とを有する請求項1に記載の成膜方法。
- 前記化合物は、トリクロロシラン系、メトキシシラン系、またはエトキシシラン系の自己組織化単分子膜材料である請求項2に記載の成膜方法。
- 前記酸化工程では、H2Oガス、H2O2ガス、O2ガス、またはO3ガスを前記基板の表面に供給することにより、前記基板の表面が酸化される請求項1から3のいずれか一項に記載の成膜方法。
- 前記金属膜は、アモルファスシリコン、銅、タングステン、またはコバルトの膜であり、
前記絶縁膜は、シリコン酸化膜、シリコン窒化膜、またはスピンオンカーボン膜である請求項1から4のいずれか一項に記載の成膜方法。 - 前記第1の除去工程では、プラズマにより前記金属膜上の自然酸化膜が除去される請求項1から5のいずれか一項に記載の成膜方法。
- 前記第2の除去工程では、前記化合物に加えて、フッ素含有ガスを前記基板の表面に供給することにより、前記金属膜上および前記自己組織化単分子膜上に形成されたチタン酸化膜を除去する請求項1から6のいずれか一項に記載の成膜方法。
- 前記フッ素含有ガスは、フッ化水素ガス、四フッ化炭素ガス、モノフルオロメタンガス、ジフルオロメタンガス、トリフルオロメタンガス、六フッ化エタンガス、八フッ化プロパンガス、八フッ化シクロブタンガス、ヘキサフルオロ-1,3-ブタジエンガス、六フッ化硫黄ガス、三フッ化窒素ガス、および三フッ化塩素ガスの中から選択される少なくとも1つのガスである請求項7に記載の成膜方法。
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| PCT/JP2020/008224 WO2020184212A1 (ja) | 2019-03-13 | 2020-02-28 | 成膜方法 |
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| KR20210139299A (ko) | 2021-11-22 |
| WO2020184212A1 (ja) | 2020-09-17 |
| US20220189778A1 (en) | 2022-06-16 |
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