Precision Improvement in Optical Proximity Correction by Optimizing Second Illumination Source Shape.
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- Nakae Akihiro
- ULSI Laboratory, Mitsubishi Electric Corporation, 4–1 Mizuhara, Itami, Hyogo 664, Japan
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- Kamon Kazuya
- ULSI Laboratory, Mitsubishi Electric Corporation, 4–1 Mizuhara, Itami, Hyogo 664, Japan
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- Hanawa Tetsuro
- ULSI Laboratory, Mitsubishi Electric Corporation, 4–1 Mizuhara, Itami, Hyogo 664, Japan
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- Moriizumi Koichi
- Manufacturing Technology Div., Mitsubishi Electric Corporation, 4–1 Mizuhara, Itami, Hyogo 664, Japan
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- Nakao Shuji
- ULSI Laboratory, Mitsubishi Electric Corporation, 4–1 Mizuhara, Itami, Hyogo 664, Japan
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抄録
We have achieved precision improvement by optimizing the second illumination source shape in our optical proximity correction system. Based on the consideration that the optical proximity effect is significantly dependent on interference conditions, we have applied a new type of modified illumination to projection optics in order to improve the correction accuracy. A new second illumination source is formed by an illumination aperture with a spindle-shaped opaque region, whose curvature is the same as that of the projection lens pupil. Through use of this aperture, pattern edges can be definitely classified according to the interference condition, and resultant improvement of the pattern size accuracy, within ±0.01 µm, which is nearly the same level as the detection limit, can be achieved.
収録刊行物
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- Japanese Journal of Applied Physics
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Japanese Journal of Applied Physics 35 (12B), 6395-6399, 1996
The Japan Society of Applied Physics
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詳細情報 詳細情報について
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- CRID
- 1390001206250329472
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- NII論文ID
- 210000040056
- 110003955289
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- NII書誌ID
- AA10457675
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- ISSN
- 13474065
- 00214922
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- NDL書誌ID
- 4637959
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可