JP7125343B2 - 表面毒化処理によるボトムアップ式間隙充填 - Google Patents
表面毒化処理によるボトムアップ式間隙充填 Download PDFInfo
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- JP7125343B2 JP7125343B2 JP2018520533A JP2018520533A JP7125343B2 JP 7125343 B2 JP7125343 B2 JP 7125343B2 JP 2018520533 A JP2018520533 A JP 2018520533A JP 2018520533 A JP2018520533 A JP 2018520533A JP 7125343 B2 JP7125343 B2 JP 7125343B2
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Description
空間的ALD処理チャンバで一定の堆積サイクル(100サイクル)後の厚さに対するNH3プラズマ曝露時間の影響を、図9に示している。この例は、一堆積サイクルに対して一毒化曝露を行うように実装された。
Claims (14)
- 処理方法であって、
表面上に少なくとも1つのフィーチャを有する基板表面を、前記少なくとも一つのフィーチャの底部と比べて前記フィーチャの上部を優先的に毒化するために、成長抑制物質を含む有機系毒化剤に曝露することであって前記少なくとも一つのフィーチャが10:1以上のアスペクト比を有する、曝露することと、
前記有機系毒化剤に曝露された後、前記少なくとも一つのフィーチャの上部における成長が前記フィーチャの底部において起こる成長の25%未満であり、かつ前記少なくとも一つのフィーチャにボイドもシームも存在しないように、ボトムアップ法で前記少なくとも一つのフィーチャ内にシリコンを含む膜を堆積させることとを含む、方法。 - 前記少なくとも一つのフィーチャ内に前記膜を堆積させることが、前記基板表面を前駆体と反応体に連続して曝露することを含む、請求項1に記載の方法。
- 前記基板表面を前記毒化剤に曝露することが、前記前駆体への各曝露の前に行われる、請求項2に記載の方法。
- 前記基板表面が、膜が約10Åから約50Åの範囲内の厚さだけ堆積した後に前記毒化剤に曝露される、請求項1から3のいずれか一項に記載の方法。
- 前記毒化剤がプラズマを含む、請求項1から3のいずれか一項に記載の方法。
- 前記プラズマが、NH3、N2、Ar、H2O、CO2、N2O、H2、及び/又はヒドラジンのうちの一又は複数を含む、請求項5に記載の方法。
- 前記毒化剤がプラズマに導入される、請求項1から3のいずれか一項に記載の方法。
- 半飽和量の前記毒化剤が前記プラズマに導入される、請求項7に記載の方法。
- 前記有機系毒化剤が、ヒドラジン、水、エチレンジアミン、エタノールアミン、アルキル、アミン、アルケン、エポキサイド、ポリアミン、及び/又はアルコールのうちの一又は複数を含む、請求項7に記載の方法。
- 前記有機系毒化剤が前記表面と熱反応する、請求項1から3のいずれか一項に記載の方法。
- 前記少なくとも一つのフィーチャの前記上部と優先的に反応するよう、前記有機系毒化剤が導入される、請求項10に記載の方法。
- 前記有機系毒化剤への前記曝露と、前記少なくとも一つのフィーチャを充填するための前記膜の堆積とを反復することを更に含む、請求項1から3のいずれか一項に記載の方法。
- 前記少なくとも一つのフィーチャ内に堆積された前記膜が、2を下回る湿式エッチング速度比を有する、請求項12に記載の方法。
- 処理方法であって、
複数の区域を備える処理チャンバ内に、基板表面を有する基板を置くことであって、各区域がガスカーテンによって隣接する区域から分離されており、前記基板表面が、上部、底部、及び側面を伴い、かつ10:1以上のアスペクト比を伴う少なくとも1つのフィーチャを有する、基板を置くことと、
前記処理チャンバの第1区域において、前記基板表面の少なくとも一部分を第1プロセス条件に曝露することであって、前記第1プロセス条件が、前記少なくとも一つのフィーチャの前記底部と比べて前記フィーチャの前記上部における膜成長を優先的に抑制するための、有機系毒化剤を含み、前記有機系毒化剤に曝露された後、前記少なくとも一つのフィーチャの上部における成長が前記フィーチャの底部において起こる成長の25%未満であり、かつ前記少なくとも一つのフィーチャにボイドもシームも存在しないように、第1プロセス条件に曝露することと、
前記基板表面を、前記処理チャンバの第2区域へと、ガスカーテンを通して横方向に動かすことと、
前記処理チャンバの前記第2区域において、前記基板表面を、シリコン前駆体を含む第2プロセス条件に曝露することと、
前記基板表面を、前記処理チャンバの第3区域へと、ガスカーテンを通して横方向に動かすことと、
前記処理チャンバの前記第3区域において、前記基板表面を第3プロセス条件に曝露することであって、前記第3プロセス条件が、SiO2膜を形成するための酸素含有反応体を含む、第3プロセス条件に曝露することと、
前記フィーチャを充填するために、前記基板表面の横方向移動を含む、前記第1区域、前記第2区域、及び前記第3区域への曝露を反復することとを含む、方法。
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