JP7266068B2 - 横方向ハードマスク凹部縮小のためのハイブリッドカーボンハードマスク - Google Patents
横方向ハードマスク凹部縮小のためのハイブリッドカーボンハードマスク Download PDFInfo
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Description
[0002] 集積回路は、単一チップ上に数百万個ものトランジスタ、コンデンサ、及び抵抗器が搭載されうる複雑なデバイスへと進化を遂げている。チップ設計の進化には、より高速な回路及びより高い回路密度が継続的に必要とされる。より高い回路密度を有するより高速な回路に対する要求は、このような集積回路の製造に使用される材料についても同様の要求を課している。特に、集積回路構成要素の寸法がサブミクロン単位まで小さくなるにつれ、このような構成要素に対して適切な電気的性能を得るためには、低抵抗率導電性材料並びに低誘電率絶縁材料を使用することが必要となることが多い。
Claims (19)
- 基板上に配置された一又は複数の材料層の上に堆積された第1のハードマスク及び第2のハードマスクをエッチングすることと、
エッチングされた前記第1のハードマスク、エッチングされた前記第2のハードマスク、及び前記一又は複数の材料層の上に、ホウ素がドープされた炭素質ハードマスクを共形に堆積することであって、前記ホウ素がドープされた炭素質ハードマスクは約25重量%を超えるホウ素と約50重量%を超える炭素を含む、炭素質ハードマスクを共形に堆積することと、
前記ホウ素がドープされた炭素質ハードマスクの中の開口を通して前記一又は複数の材料層をエッチングすることと、
を含む基板処理方法。 - 前記一又は複数の材料層は、窒化ケイ素材料及び酸化ケイ素材料を含む、請求項1に記載の方法。
- 前記窒化ケイ素材料及び前記酸化ケイ素材料は、積み重ねられた層を形成するため、交互の層に堆積される、請求項2に記載の方法。
- 前記積み重ねられた層は、約48を超える材料層を有する、請求項3に記載の方法。
- 前記第1のハードマスクは、炭素含有材料であり、前記一又は複数の材料層の上に接触して堆積される、請求項1に記載の方法。
- 前記第1のハードマスクは、約1μmから約2μmまでの厚さに堆積される、請求項5に記載の方法。
- 前記第2のハードマスクは、誘電体材料であり、前記第1のハードマスクの上に接触して堆積される、請求項5に記載の方法。
- 前記誘電体材料は、ケイ素含有材料である、請求項7に記載の方法。
- 前記ケイ素含有材料は、二酸化ケイ素材料、窒化ケイ素材料、酸窒化ケイ素材料、或いはこれらの組み合わせである、請求項8に記載の方法。
- 前記第2のハードマスクは、約50μmから200μmまでの厚さに堆積される、請求項7に記載の方法。
- 前記第1のハードマスク及び前記第2のハードマスクをエッチングするために第1のエッチング処理を行うことは、フッ化炭素前駆体を用いたプラズマエッチング処理である、請求項7に記載の方法。
- 前記ホウ素がドープされた炭素質ハードマスクは、約5nmから約15nmまでの厚さを有する、請求項7に記載の方法。
- 前記ホウ素がドープされた炭素質ハードマスクは、窒素をふくむ炭窒化ホウ素材料である、請求項1に記載の方法。
- 前記炭窒化ホウ素材料の少なくとも約80原子%は、ホウ素、炭素及び窒素から形成される、請求項13に記載の方法。
- 前記炭窒化ホウ素材料は、前駆体としてジメチルアミンボランを用いた熱CVD処理によって堆積される、請求項14に記載の方法。
- 基板上に第1のハードマスクを堆積することと、
前記第1のハードマスク上に第2のハードマスクを堆積することと、
前記第1のハードマスク及び前記第2のハードマスクをエッチングするために第1のエッチング処理を行うことと、
前記第1のハードマスク及び前記第2のハードマスクの上に、約25重量%を超えるホウ素と約50重量%を超える炭素を含む炭窒化ホウ素ハードマスクを堆積することと、
前記炭窒化ホウ素ハードマスクの中の開口を通して前記基板をエッチングすることと、
を含む、基板処理方法。 - 前記炭窒化ホウ素ハードマスクは、前記第1のハードマスク及び前記第2のハードマスクの上に共形に堆積される、請求項16に記載の方法。
- 基板上に配置された一又は複数の酸化物及び窒化物含有材料層の上に炭素質ハードマスクを堆積することと、
前記炭素質ハードマスク上にケイ素含有誘電体ハードマスクを堆積することと、
前記一又は複数の酸化物及び窒化物含有材料層、前記炭素質ハードマスク、及び前記ケイ素含有誘電体ハードマスクの上に、炭窒化ホウ素ハードマスクを堆積することであって、約25重量%を超えるホウ素と約50重量%を超える炭素を含む前記炭窒化ホウ素ハードマスクを堆積することと、
前記炭窒化ホウ素ハードマスクの中の開口を通して前記一又は複数の酸化物及び窒化物含有材料層をエッチングすることと、
を含む、基板処理方法。 - 前記炭窒化ホウ素ハードマスクの少なくとも約80原子%は、ホウ素、炭素及び窒素から形成されている、請求項18に記載の方法。
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| US201662281046P | 2016-01-20 | 2016-01-20 | |
| US62/281,046 | 2016-01-20 | ||
| JP2018537462A JP6907217B2 (ja) | 2016-01-20 | 2017-01-04 | 横方向ハードマスク凹部縮小のためのハイブリッドカーボンハードマスク |
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| JP2021108321A Active JP7266068B2 (ja) | 2016-01-20 | 2021-06-30 | 横方向ハードマスク凹部縮小のためのハイブリッドカーボンハードマスク |
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| KR (2) | KR102746996B1 (ja) |
| CN (2) | CN116631865A (ja) |
| TW (1) | TWI726034B (ja) |
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| US9362130B2 (en) | 2013-03-01 | 2016-06-07 | Applied Materials, Inc. | Enhanced etching processes using remote plasma sources |
| US9309598B2 (en) | 2014-05-28 | 2016-04-12 | Applied Materials, Inc. | Oxide and metal removal |
| US9966240B2 (en) | 2014-10-14 | 2018-05-08 | Applied Materials, Inc. | Systems and methods for internal surface conditioning assessment in plasma processing equipment |
| US9355922B2 (en) | 2014-10-14 | 2016-05-31 | Applied Materials, Inc. | Systems and methods for internal surface conditioning in plasma processing equipment |
| US11637002B2 (en) | 2014-11-26 | 2023-04-25 | Applied Materials, Inc. | Methods and systems to enhance process uniformity |
| US10573496B2 (en) | 2014-12-09 | 2020-02-25 | Applied Materials, Inc. | Direct outlet toroidal plasma source |
| US11257693B2 (en) | 2015-01-09 | 2022-02-22 | Applied Materials, Inc. | Methods and systems to improve pedestal temperature control |
| US20160225652A1 (en) | 2015-02-03 | 2016-08-04 | Applied Materials, Inc. | Low temperature chuck for plasma processing systems |
| US9728437B2 (en) | 2015-02-03 | 2017-08-08 | Applied Materials, Inc. | High temperature chuck for plasma processing systems |
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