JP2020518134A - 高アスペクト比構造における間隙充填方法 - Google Patents
高アスペクト比構造における間隙充填方法 Download PDFInfo
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- JP2020518134A JP2020518134A JP2019557396A JP2019557396A JP2020518134A JP 2020518134 A JP2020518134 A JP 2020518134A JP 2019557396 A JP2019557396 A JP 2019557396A JP 2019557396 A JP2019557396 A JP 2019557396A JP 2020518134 A JP2020518134 A JP 2020518134A
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- H01L21/76831—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers in via holes or trenches, e.g. non-conductive sidewall liners
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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Abstract
Description
Claims (15)
- 処理方法において、
基板表面から底面までの深さにわたって延びる少なくとも1つの特徴を備えた基板表面を提供することであって、前記少なくとも1つの特徴が第1の側壁及び第2の側壁によって画定された幅を有する、提供すること;
前記基板表面、並びに前記少なくとも1つの特徴の前記第1の側壁、第2の側壁、及び底面に、前記特徴の上部の厚さ及び前記特徴の底部の厚さを有する膜を形成すること;
前記膜を処理して、前記膜の構造、組成、又は形態のうちの1つ以上を変更して、処理された膜を形成すること;及び
前記処理された膜をエッチングして、前記特徴の上部から前記処理された膜を実質的にすべて除去し、前記処理された膜の少なくとも一部を前記特徴の底部に残すこと
を含む、方法。 - 前記膜を形成すること、前記膜を処理すること、及び前記特徴が満たされていない場合に、前記特徴が満たされるまで前記処理された膜をエッチングすることを繰り返すことをさらに含む、請求項1に記載の方法。
- 前記膜を処理することが、前記膜をAr、He、又はH2のうちの1種以上を含むプラズマに曝露することを含む、請求項1に記載の方法。
- 前記膜が実質的にアモルファスであり、前記膜を処理することにより、前記膜の少なくとも一部が結晶化する、請求項3に記載の方法。
- 前記膜がシリコンを含む、請求項1に記載の方法。
- 前記膜が、処理前に約1から約50nmの範囲の厚さに堆積される、請求項1に記載の方法。
- 前記処理された膜をエッチングすることが、前記膜を、Cl2、H2、又はHClのうちの1種以上を含む化学エッチングに曝露することを含む、請求項1に記載の方法。
- 前記化学エッチングがプラズマを含む、請求項7に記載の方法。
- 前記基板がシリコンを含む、請求項1に記載の方法。
- 処理方法であって、
側壁と底部とを有する特徴をその上に有する基板表面を提供すること;
前記特徴内及び前記基板表面上にシリコン膜を堆積させること;
前記シリコン膜を、前記シリコン膜の構造、組成、又は形態を修正するための処理に曝露することであって、前記処理が、Ar、He、又はH2のうちの1種以上への曝露を含む、曝露すること;
H2、HCl、又はCl2のうちの1種以上を使用して前記基板表面から前記膜をエッチングし、前記基板表面から前記膜の実質的にすべてを除去し、前記特徴内に前記膜の少なくとも一部を残すこと;及び
前記堆積、処理、及びエッチングを繰り返して、前記特徴を埋めること
を含む、方法。 - 前記シリコン膜が実質的にアモルファスであり、前記処理に曝露することにより、前記膜の少なくとも一部が結晶化する、請求項10に記載の方法。
- 前記シリコン膜の約50%以上が、前記シリコン膜を前記処理に曝露した後に結晶化する、請求項11に記載の方法。
- 前記シリコン膜が、処理前に、約1から約50nmの範囲の厚さに堆積される、請求項10に記載の方法。
- 前記膜をエッチングすることがプラズマをさらに含む、請求項10に記載の方法。
- 前記特徴の底部にSiN、SiO、又はSiONが実質的に存在しないように、前記膜の形成前に、前記基板表面にSiN、SiO、又はSiONのうちの1つ以上を形成することをさらに含む、請求項1から14のいずれか一項に記載の方法。
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