JP2005519348A - 液浸リソグラフィ用の屈折投影対物レンズ - Google Patents
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Abstract
【解決手段】 屈折投影対物レンズにおいて、該投影対物レンズの最終光学素子と該投影対物レンズの像面との間に配置された液浸媒体を使用して、該投影対物レンズの物体面上に配置されたパターンを前記像面に投影する屈折投影対物レンズであって、前記物体面に続く、負の屈折力を有する第1レンズ群(LG1)と、該第1レンズ群に続く、正の屈折力を有する第2レンズ群(LG2)と、該第2レンズ群に続く、負の屈折力を有する第3レンズ群(LG3)と、該第3レンズ群に続く、正の屈折力を有する第4レンズ群(LG4)と、該第4レンズ群に続く、正の屈折力を有する第5レンズ群(LG5)と、前記第4及び第5レンズ群間の最大ビーム直径の領域内に配置された光学系アパーチュア(5)と、を備える屈折投影対物レンズ。
Description
λeff=λ0/n
が得られ、λ0は真空動作波長であり、nは液浸媒体の屈折率である。これによって解像度:
R=k1(λeff/NA0)
が得られ、焦点深度(DOF):
DOF=±k2(λeff/NA0 2)
であり、NA0=sinθ0は、「ドライ」開口数であり、θ0は、対物レンズの開口角の半分である。実験定数k1及びk2は、プロセスによって決まる。
物体面に続く、負の屈折力を有する第1レンズ群と、
それに続く、正の屈折力を有する第2レンズ群と、
それに続く、負の屈折力を有する第3レンズ群と、
それに続く、正の屈折力を有する第4レンズ群と、
それにに続く、正の屈折力を有する第5レンズ群と、
第4レンズ群及び第5レンズ群間の最大ビーム直径の領域内に配置された光学系アパーチュアと、
を備えている。
p(h)=[((1/r)h2)(1+SQRT(1−(1+K)(1/r)2h2))]+C1*h4+C2*h6+・・・
を使用して計算される。但し、半径の逆数(1/r)が表面曲率を規定し、hは、光学軸から表面点までの距離である。したがって、p(h)は、いわゆる矢、すなわち、z方向、すなわち、光学軸の方向において表面頂点から表面点までの距離を示す。定数K、C1、C2・・・は、表2に示されている。
Claims (36)
- 屈折投影対物レンズにおいて、該投影対物レンズの最終光学素子と該投影対物レンズの像面との間に配置された液浸媒体を使用して、該投影対物レンズの物体面上に配置されたパターンを前記像面に投影する屈折投影対物レンズであって、
前記物体面に続く、負の屈折力を有する第1レンズ群(LG1)と、
該第1レンズ群に続く、正の屈折力を有する第2レンズ群(LG2)と、
該第2レンズ群に続く、負の屈折力を有する第3レンズ群(LG3)と、
該第3レンズ群に続く、正の屈折力を有する第4レンズ群(LG4)と、
該第4レンズ群に続く、正の屈折力を有する第5レンズ群(LG5)と、
前記第4及び第5レンズ群間の最大ビーム直径の領域内に配置された光学系アパーチュア(5)と、
を備える屈折投影対物レンズ。 - 前記光学系アパーチュア(5)は、像に近い最大ビーム直径の平面と前記像面(3)との間に位置する、請求項1に記載の投影対物レンズ。
- 像側の開口数NA≧0.9であり、該像側開口数は好ましくは、少なくともNA=1.0である、請求項1または2に記載の投影対物レンズ。
- 動作波長で屈折率n>1.3である液浸媒体(10)に適応させた、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 像側動作距離が、約10μm〜約200μm、特に、約20μm〜約100μmである、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記第4レンズ群(LG4)の焦点距離及び前記第5レンズ群(LG5)の焦点距離の比が、約0.9〜約1.1である、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記第1レンズ群(LG1)及び前記第5レンズ群(LG5)の焦点距離の大きさの比が、約0.7〜約1.3、特に約0.9〜約1.1である、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 該投影対物レンズの全長と前記第5レンズ群(LG5)の前記焦点距離との比が、5より大きく、好ましくは6より大きく、特に8より大きい、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記第1レンズ群(LG1)は、少なくとも1つの非球面を有し、好ましくは2つの非球面が、前記第1レンズ群内に設けられている、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 少なくとも1つの非球面が、前記第3レンズ群(LG3)内に設けられ、好ましくは2つの非球面が設けられている、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 少なくとも1つの非球面が、前記1レンズ群(LG1)内に配置され、かつ/または、9個以下の非球面が設けられ、好ましくは、7個未満の非球面が設けられている、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 負の屈折力を有する、物体面に対して凸状の少なくとも1つのメニスカスレンズ(13)が、物体面(2)の近傍域に、特に前記第1レンズ群(LG1)内に配置されている、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記第2レンズ群は、正の屈折力を有する少なくとも4個の、好ましくは少なくとも5個または6個の連続したレンズ(14〜20)を有する、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記第2レンズ群(LG2)は、物体面(2)に対して凹状で、物体面(2)に面する入射側に正の屈折力を有する少なくとも1つの、好ましくは複数のメニスカスレンズ(14、15、16、17)を有し、かつ/または、前記第2レンズ群は、物体面に対して凸状で、像面に面する出射側に正の屈折力を有する少なくとも1つの、好ましくは複数のメニスカスレンズ(19、20)を有する、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 上記順序の前記第2レンズ群(LG2)は、物体面に対して凹状で、正の屈折力を有する少なくとも1つのメニスカスレンズ(14、15、16、17)と、両凸正レンズ(18)と、像面に対して凹状で、正の屈折力を有する少なくとも1つのメニスカスレンズ(19、20)とを有する、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記第3レンズ群(LG3)は、負の屈折力を有するレンズ(21、22、23、24)だけを有する、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記第3レンズ群は、該第3レンズ群(LG3)内に位置する対称面(9)に関してほぼ対称構造であり、かつ/または、前記第3レンズ群(LG3)内で、2つの逆方向に湾曲した凹面が、互いに直接的に向き合い、また、互いに対して凹状の2つの凹面によって包囲されている、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記第2レンズ群(LG2)の、前記第3レンズ群(LG3)に面する出射領域、及び前記第4レンズ群(LGd4)の、前記第3レンズ群に続く入射領域は、前記第3レンズ群内に位置する対称面(9)に対してほぼ対称的に構成されている、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記第4レンズ群(LG4)は、両凸正レンズ(27、29)、及び物体側に凹状のレンズ面を有する下流側の負のメニスカスレンズ(28、30)を有する少なくとも1つの二重レンズ(17、28、29、30)を有し、好ましくは少なくとも2つの二重レンズが設けられている、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 物体側入射領域において、前記第4レンズ群(LG4)は、物体面(2)に対して凹状で、正の屈折力を有する少なくとも1つのメニスカスレンズ(25、26)を有し、好ましくは、そのようなメニスカスレンズが複数、連続的に設けられている、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記光学面に衝突する放射光線の最大入射角の正弦が、像側の開口数の90%未満、特に85%未満である、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記第5レンズ群(LG5)は、正の屈折力を有するレンズだけを有する、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記第5レンズ群は、少なくとも4つの正のレンズ(31〜35)を有する、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記第5レンズ群(LG5)は、像側に凹状のレンズ面を備えて正の屈折力を有する少なくとも1つのメニスカスレンズ(33、34)を有する、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 最終光学素子として、前記第5レンズ群(LG5)は、好ましくは球形の入射面及びほぼ平坦な出射面を備えた平凸レンズ(35)を有する、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記平凸レンズ(35)は、非半球状に構成されている、請求項25に記載の投影対物レンズ。
- 前記レンズはすべて、同一材料からなり、193nmの動作波長用のレンズ材料として好ましくは合成石英ガラスが使用され、かつ/または、157nmの波長用のレンズ材料としてフッ化カルシウムが使用される、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 物体の近くの胴部(6)、物体から遠い胴部(8)及びその間のウエスト(7)を有する単一ウエスト光学系である、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 像フィールド直径は、10mmを、特に20mmを超え、かつ/または、像フィールド直径は、全長の1.0%を、特に1.5%を超える、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 光コンダクタンスは、全長の約1%を、特に約2%を超える、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記光学系アパーチュア(5)の上流側には、前記光学系アパーチュア(5)の下流側より相当に多くのレンズが、好ましくは、少なくとも4倍の数のレンズが配置されている、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記ウエスト及び前記光学系アパーチュア(5)間に、正の屈折力を有する少なくとも5個のレンズが配置されている、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 前記ウエスト及び前記光学系アパーチュア(5)間の距離は、全長の少なくとも26%、好ましくは全長の30%を超える、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 最大周縁光線高さは、最狭くびれ位置での周縁光線高さの少なくとも2倍である、先行の請求項のいずれか1項に記載の投影対物レンズ。
- 先行の請求項のいずれか1項に記載の屈折投影対物レンズ(1、1’、1”)を特徴とする、マイクロリソグラフィ用の投影露光装置。
- 半導体部品及び他の微細構造の構造部品を製造する方法であって、
所定パターンを有するマスクを設ける段階と、
該マスクに所定波長の紫外線を照射する段階と、
請求項1〜34のいずれか1項に記載の投影対物レンズを使用して、該投影対物レンズの像面の領域に配置された感光性基板上に前記パターンの像を投影する段階と、
を含み、
投影対物レンズの最終光学面と基板との間に配置された液浸媒体が、投影中に徹照される方法。
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DE10210899A DE10210899A1 (de) | 2002-03-08 | 2002-03-08 | Refraktives Projektionsobjektiv für Immersions-Lithographie |
PCT/EP2003/001954 WO2003077037A1 (en) | 2002-03-08 | 2003-02-26 | Refractive projection objective for immersion lithography |
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KR (1) | KR100991590B1 (ja) |
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KR100866818B1 (ko) | 2000-12-11 | 2008-11-04 | 가부시키가이샤 니콘 | 투영광학계 및 이 투영광학계를 구비한 노광장치 |
JP2002323653A (ja) | 2001-02-23 | 2002-11-08 | Nikon Corp | 投影光学系,投影露光装置および投影露光方法 |
WO2002091078A1 (en) * | 2001-05-07 | 2002-11-14 | Massachusetts Institute Of Technology | Methods and apparatus employing an index matching medium |
JP2003185920A (ja) | 2001-12-18 | 2003-07-03 | Nikon Corp | 結像光学系及び投影露光装置 |
JP4016179B2 (ja) * | 2002-02-28 | 2007-12-05 | ソニー株式会社 | 露光装置及び収束レンズの制御方法 |
EP1481286A2 (de) | 2002-03-01 | 2004-12-01 | Carl Zeiss SMT AG | Refraktives projektionsobjektiv mit einer taille |
DE10210899A1 (de) | 2002-03-08 | 2003-09-18 | Zeiss Carl Smt Ag | Refraktives Projektionsobjektiv für Immersions-Lithographie |
KR20050035890A (ko) | 2002-08-23 | 2005-04-19 | 가부시키가이샤 니콘 | 투영 광학계, 포토리소그래피 방법, 노광 장치 및 그 이용방법 |
JP3982362B2 (ja) | 2002-08-23 | 2007-09-26 | 住友電気工業株式会社 | 光データリンク |
-
2002
- 2002-03-08 DE DE10210899A patent/DE10210899A1/de not_active Withdrawn
- 2002-05-03 AU AU2002312872A patent/AU2002312872A1/en not_active Abandoned
- 2002-05-03 WO PCT/EP2002/004846 patent/WO2003077036A1/de active Application Filing
- 2002-05-03 EP EP02738025A patent/EP1483625A1/de not_active Withdrawn
- 2002-05-03 JP JP2003575189A patent/JP2005519347A/ja active Pending
-
2003
- 2003-02-26 EP EP03717197A patent/EP1485760A1/en not_active Withdrawn
- 2003-02-26 JP JP2003575190A patent/JP2005519348A/ja active Pending
- 2003-02-26 WO PCT/EP2003/001954 patent/WO2003077037A1/en active Application Filing
- 2003-02-26 AU AU2003221490A patent/AU2003221490A1/en not_active Abandoned
- 2003-02-26 KR KR1020047014023A patent/KR100991590B1/ko active IP Right Grant
- 2003-02-26 CN CNB038055759A patent/CN100573222C/zh not_active Expired - Fee Related
- 2003-03-06 US US10/379,809 patent/US6891596B2/en not_active Expired - Fee Related
-
2004
- 2004-09-08 US US10/935,321 patent/US7203008B2/en not_active Expired - Lifetime
-
2005
- 2005-03-22 US US11/085,602 patent/US7312847B2/en not_active Expired - Fee Related
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2005286026A (ja) * | 2004-03-29 | 2005-10-13 | Canon Inc | 露光装置 |
JP4510494B2 (ja) * | 2004-03-29 | 2010-07-21 | キヤノン株式会社 | 露光装置 |
JP2008502127A (ja) * | 2004-06-04 | 2008-01-24 | カール・ツァイス・エスエムティー・アーゲー | 強度変化の補償を伴う投影系及びそのための補償素子 |
JP2012028803A (ja) * | 2004-06-04 | 2012-02-09 | Carl Zeiss Smt Gmbh | 強度変化の補償を伴う投影系及びそのための補償素子 |
JP4913041B2 (ja) * | 2004-06-04 | 2012-04-11 | カール・ツァイス・エスエムティー・ゲーエムベーハー | 強度変化の補償を伴う投影系及びそのための補償素子 |
KR20200057037A (ko) * | 2017-09-29 | 2020-05-25 | 상하이 마이크로 일렉트로닉스 이큅먼트(그룹) 컴퍼니 리미티드 | 투사 대물렌즈 |
JP2020535482A (ja) * | 2017-09-29 | 2020-12-03 | シャンハイ マイクロ エレクトロニクス イクイプメント(グループ)カンパニー リミティド | 投影対物レンズ |
KR102378080B1 (ko) | 2017-09-29 | 2022-03-24 | 상하이 마이크로 일렉트로닉스 이큅먼트(그룹) 컴퍼니 리미티드 | 투사 대물렌즈 |
Also Published As
Publication number | Publication date |
---|---|
US20070188880A1 (en) | 2007-08-16 |
US20050141098A1 (en) | 2005-06-30 |
WO2003077037A1 (en) | 2003-09-18 |
CN100573222C (zh) | 2009-12-23 |
US7312847B2 (en) | 2007-12-25 |
EP1485760A1 (en) | 2004-12-15 |
US7495840B2 (en) | 2009-02-24 |
AU2003221490A1 (en) | 2003-09-22 |
WO2003077036A1 (de) | 2003-09-18 |
US7203008B2 (en) | 2007-04-10 |
JP2005519347A (ja) | 2005-06-30 |
US20050231814A1 (en) | 2005-10-20 |
DE10210899A1 (de) | 2003-09-18 |
KR100991590B1 (ko) | 2010-11-04 |
CN1639644A (zh) | 2005-07-13 |
AU2002312872A1 (en) | 2003-09-22 |
KR20040099307A (ko) | 2004-11-26 |
US20030174408A1 (en) | 2003-09-18 |
EP1483625A1 (de) | 2004-12-08 |
US6891596B2 (en) | 2005-05-10 |
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