JP2013546172A - Euv光源のためのシード保護を備える発振器−増幅器駆動レーザー - Google Patents
Euv光源のためのシード保護を備える発振器−増幅器駆動レーザー Download PDFInfo
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- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/07—Construction or shape of active medium consisting of a plurality of parts, e.g. segments
- H01S3/073—Gas lasers comprising separate discharge sections in one cavity, e.g. hybrid lasers
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- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1123—Q-switching
- H01S3/117—Q-switching using intracavity acousto-optic devices
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
- H01S3/0811—Construction or shape of optical resonators or components thereof comprising three or more reflectors incorporating a dispersive element, e.g. a prism for wavelength selection
- H01S3/0812—Construction or shape of optical resonators or components thereof comprising three or more reflectors incorporating a dispersive element, e.g. a prism for wavelength selection using a diffraction grating
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- H—ELECTRICITY
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/22—Gases
- H01S3/223—Gases the active gas being polyatomic, i.e. containing two or more atoms
- H01S3/2232—Carbon dioxide (CO2) or monoxide [CO]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2383—Parallel arrangements
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
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- H05G2/003—X-ray radiation generated from plasma being produced from a liquid or gas
- H05G2/005—X-ray radiation generated from plasma being produced from a liquid or gas containing a metal as principal radiation generating component
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Abstract
【選択図】図4
Description
本発明は、2011年3月31日出願の「OSCILLATOR AMPLIFIER DRIVE LASER WITH SEED PROTECTION FOR AN EUV LIGHT SOURCE(EUV光源のためのシード保護を備える発振器増幅器駆動レーザー)」米国出願第13/077,757号、代理人整理番号2010−0017−02の優先権を主張し、更に2010年10月18日出願の「OSCILLATOR AMPLIFIER DRIVE LASER WITH SEED PROTECTION FOR AN EUV LIGHT SOURCE(EUV光源のためのシード保護を備える発振器増幅器駆動レーザー)」米国仮出願第61/455,289号、代理人整理番号2010−0017−01の優先権を主張するものであり、これらの全ての内容は引用によって本明細書に組み込まれている。
本出願は、プラズマ源材料から生成され、EUV光源チャンバの外部での利用のため、例えば半導体集積回路製造フォトリソグラフィのために、中間的な場所に集光されて導かれる、例えば約100nm及びそれ以下の波長のEUV光を供給する極紫外(「EUV」)光源に関する。
Claims (20)
- ビーム経路上に光出力を生成する発振器と、
照射箇所における前記ビーム経路上の光と相互作用するためのターゲット材料と、
ビーム折り返し光学構成を有する、前記ビーム経路上のビーム遅延器と、
前記ビーム経路に沿って位置決めされ、前記発振器と前記ビーム遅延器との間に挿入されるスイッチと、
を備えるデバイスであって、
前記スイッチは、前記ビーム経路上の光のうちの少なくとも一部を前記ビーム経路から経路変更するように閉鎖可能であり、該スイッチは、閉鎖時間t1を有し、該ビーム経路は、該スイッチから前記照射箇所までの経路に沿って長さL1を有し、cが前記経路上の光の速度である場合、t1<cL1であり、前記発振器を保護するようになっているデバイス。 - 前記スイッチは、音響−光学変調(AOM)スイッチである、請求項1に記載のデバイス。
- 前記ビーム経路上に位置決めされた増幅器を更に備える、請求項1に記載のデバイス。
- 前記ビーム経路上に位置決めされた光学アイソレーターを更に備える、請求項1に記載のデバイス。
- 前記光学アイソレーターは、偏光識別光学体及び位相遅延光学体を備える、請求項4に記載のデバイス。
- 前記スイッチは、300〜500nsの範囲の閉鎖時間t1を有する、請求項1に記載のデバイス。
- 請求項1に記載のデバイスであって、前記発振器は、主パルスシード出力を発生させる第1の発振器であり、前記デバイスは、予備パルスシード出力を発生させる第2の発振器を更に備えることを特徴とするデバイス。
- 前記ビーム遅延器は、80メートルから120メートルの範囲の長さを有する、請求項1に記載のデバイス。
- ビーム経路上に光出力を生成し、出力カプラを有する発振器と、
前記ビーム経路上に位置決めされた増幅器と、
前記ビーム経路上の照射箇所においてビームくびれ部直径Dを有する集束光との相互作用のために速度vで移動し、前記くびれ部においてT=D/2vである予備シード相互作用時間Tを有するターゲット材料小滴と、
ビーム折り返し光学構成を有する、前記ビーム経路上のビーム遅延器と、
を備えるデバイスであって、
前記ビーム経路は、前記出力カプラから前記照射箇所までの前記経路に沿って長さlを有し、cが該経路上の光の速度である場合、2cl>Tであり、前記出力カプラと前記小滴との間の振動を低減するようになっているデバイス。 - 前記小滴速度vは、毎秒50メートルから100メートルの範囲にあり、前記ビームくびれ部直径は、80μmから120μmの範囲にある、請求項9に記載のデバイス。
- 前記ビーム経路上に位置決めされた光学アイソレーターを更に備える、請求項9に記載のデバイス。
- 請求項9に記載のデバイスであって、前記発振器は、予備パルスシード出力を発生させる第1の発振器であり、前記デバイスは、主パルスシード出力を発生させる第2の発振器を更に備えることを特徴とするデバイス。
- 前記増幅器は、1×105から1×107の範囲のワンパス主パルス利得を有する、請求項12に記載のデバイス。
- 前記ビーム遅延器は、60メートルから140メートルの範囲の長さを有する、請求項9に記載のデバイス。
- 前記ビーム経路上の光を、ビームくびれ部直径Dを有するくびれ部に集束させるレンズを更に備える、請求項9に記載のデバイス。
- 光学増幅器と、
予備パルスシードレーザーと、
主パルスシードレーザーと、
予備パルス出力と主パルス出力とを前記光学増幅器を通る共通のビーム経路上に導くためのビーム合成器と、
前記予備パルスシードレーザーと前記ビーム合成器との間に挿入される第1のスイッチと、
前記主パルスシードレーザーと前記ビーム合成器との間に挿入される第2のスイッチと、
を備えるデバイス。 - 前記第1及び第2のスイッチの各々は、音響−光学変調(AOM)スイッチを備える、請求項16に記載のデバイス。
- 前記光学増幅器と前記ビーム合成器との間の前記ビーム経路上に位置決めされた光学アイソレーターを更に備える、請求項16に記載のデバイス。
- 前記ビーム合成器は、部分反射光学体である、請求項16に記載のデバイス。
- 前記ビーム合成器は、ダイクロイックビーム合成器を備える、請求項16に記載のデバイス。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US45528910P | 2010-10-18 | 2010-10-18 | |
US61/455,289 | 2010-10-18 | ||
US13/077,757 | 2011-03-31 | ||
US13/077,757 US8462425B2 (en) | 2010-10-18 | 2011-03-31 | Oscillator-amplifier drive laser with seed protection for an EUV light source |
PCT/US2011/050566 WO2012054145A1 (en) | 2010-10-18 | 2011-09-06 | Oscillator-amplifier drive laser with seed protection for an euv light source |
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JP2013546172A true JP2013546172A (ja) | 2013-12-26 |
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JP2013533857A Pending JP2013546172A (ja) | 2010-10-18 | 2011-09-06 | Euv光源のためのシード保護を備える発振器−増幅器駆動レーザー |
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Country | Link |
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US (1) | US8462425B2 (ja) |
EP (1) | EP2630704A4 (ja) |
JP (1) | JP2013546172A (ja) |
KR (1) | KR101872750B1 (ja) |
TW (1) | TWI549390B (ja) |
WO (1) | WO2012054145A1 (ja) |
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KR20190050825A (ko) * | 2016-09-20 | 2019-05-13 | 에이에스엠엘 네델란즈 비.브이. | 파장 기반 광학 필터링 |
KR20190137199A (ko) * | 2018-05-31 | 2019-12-11 | 주식회사 메드썬 | 멀티 펄스 레이저 생성 장치 |
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JP2018506164A (ja) * | 2014-12-05 | 2018-03-01 | エーエスエムエル ネザーランズ ビー.ブイ. | レーザシステム内の利得エレメントを隔離するためのシステム及び方法 |
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JP2019535125A (ja) * | 2016-09-20 | 2019-12-05 | エーエスエムエル ネザーランズ ビー.ブイ. | 波長ベースの光フィルタリング |
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Also Published As
Publication number | Publication date |
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TW201228162A (en) | 2012-07-01 |
US20120092746A1 (en) | 2012-04-19 |
EP2630704A4 (en) | 2017-11-15 |
KR20130141467A (ko) | 2013-12-26 |
KR101872750B1 (ko) | 2018-06-29 |
TWI549390B (zh) | 2016-09-11 |
US8462425B2 (en) | 2013-06-11 |
WO2012054145A1 (en) | 2012-04-26 |
EP2630704A1 (en) | 2013-08-28 |
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