Effect of Pattern Layout and Dissolved Oxygen in CO2 Rinse Water on Cu Corrosion during Post-Etch Cleaning
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概要
- 論文の詳細を見る
When post-etch cleaning was carried out in Cu dual-damascene process, Cu at the bottom of isolated via was etched out especially in the wafer edge, and this would become a critical issue as device scale is shrunk. The corrosion was caused in the rinse step rather than chemical cleaning step because dissolved oxygen in rinse water from the air increased oxidation–reduction potential (ORP) and CO2 included in the rinse water for preventing wafer electrification decreased pH. The corrosion was found to be suppressed by increasing dummy pattern density and by controlling atmosphere and pH of the rinse water.
- 2010-05-25
著者
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Noriaki Oda
Semiconductor Leading Edge Technologies, Inc., 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
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Seiichi Kondo
Semiconductor Leading Edge Technologies, Inc., 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
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Shuichi Saito
Semiconductor Leading Edge Technologies, Inc. (Selete), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
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Tokuri Kentaro
Semiconductor Leading Edge Technologies, Inc. (Selete), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
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Yamashita Yukinari
Organo Corporation, R&D Center, 4-4-1 Nishionuma, Sagamihara, Kanagawa 229-0012, Japan
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Shiohara Morio
Semiconductor Leading Edge Technologies, Inc. (Selete), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
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Noriaki Oda
Semiconductor Leading Edge Technologies, Inc. (Selete), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
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Kentaro Tokuri
Semiconductor Leading Edge Technologies, Inc. (Selete), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
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Morio Shiohara
Semiconductor Leading Edge Technologies, Inc. (Selete), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
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Yukinari Yamashita
Organo Corporation, R&D Center, 4-4-1 Nishionuma, Sagamihara, Kanagawa 229-0012, Japan
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Yamashita Yukinari
Organo Corporation, R&D Center, 4-4-1 Nishionuma, Sagamihara, Kanagawa 229-0012, Japan
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Seiichi Kondo
Semiconductor Leading Edge Technologies, Inc. (Selete), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
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