JP2013541844A - Euv非出力期間中のlpp駆動レーザー出力のための方法 - Google Patents
Euv非出力期間中のlpp駆動レーザー出力のための方法 Download PDFInfo
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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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- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K5/00—Irradiation devices
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- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
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- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70008—Production of exposure light, i.e. light sources
- G03F7/70033—Production of exposure light, i.e. light sources by plasma extreme ultraviolet [EUV] sources
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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
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Abstract
【選択図】 図1
Description
本発明は、2011年6月9日出願の「EUV Light Source with Subsystem(s) for Maintaining LPP Drive Laser Output During EUV Non−Output Periods(EUV非出力期間中にLPP駆動レーザー出力を維持するためのサブシステムを有するEUV光源)」米国特許出願第13/157,233号、代理人整理番号2010−0014−02の優先権を主張し、更に2010年10月4日出願の「EUV Light Source with a Temperature Stabilized Drive Laser(温度安定化駆動レーザーを有するEUV光源)」米国仮出願第61/404,564号、代理人整理番号2010−0014−01の優先権を主張し、これらの開示内容全体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 (21)
- ターゲット材料の小滴を生成する小滴発生器と、
小滴が事前選択場所に到達する場合に捕捉時間信号を供給するセンサと、
前記センサと結合され、前記捕捉時間信号から遅延されたトリガ信号を発生させる遅延回路と、
トリガ信号に応じてレーザーパルスを生成するレーザー源と、
前記捕捉時間から第1の遅延時間だけ遅延されたトリガ信号を供給して、小滴上に集束される光パルスを発生させ、前記捕捉時間から第2の遅延時間だけ遅延されたトリガ信号を供給して、小滴上に集束されない光パルスを発生させるように前記遅延回路を制御するシステムと、
を備えるデバイス。 - 前記第1の遅延時間は、前記第2の遅延時間よりも長い、請求項1に記載のデバイス。
- 前記第1の遅延時間は、前記第2の遅延時間よりも短い、請求項1に記載のデバイス。
- 前記センサは、レーザー源及び検出器を備える、請求項1に記載のデバイス。
- 前記遅延回路は、デジタルシフトレジスタを備える、請求項1に記載のデバイス。
- 割り込み期間によって分離された少なくとも2つのバースト期間内にEUVパルスを生成するための方法であって、
各バースト期間中及び前記割り込み期間中にターゲット材料小滴を発生させる段階と、
各バースト期間中及び前記割り込み期間中にレーザーパルスを発生させる段階と、
EUV出力を生成するために、バースト期間中にレーザーパルスをそれぞれの小滴上に集束させる段階と、
割り込み期間中にレーザー集束スポットと小滴との間に距離を発生させる段階と、
を含む方法。 - 前記発生段階は、前記バースト期間の間に前記割り込み期間とは異なる、小滴位置に対するレーザートリガタイミングを与えることによって達成される、請求項6に記載の方法。
- 小滴は、バースト期間中に照射箇所に向かって第1の経路に沿って移動し、前記発生段階は、前記割り込み期間中に該照射箇所と交差しない第2の経路に小滴を経路変更することによって実現される、請求項6に記載の方法。
- 前記レーザーパルスは、バースト期間中に照射箇所にある集束スポットに集束され、前記発生段階は、前記割り込み期間中に該集束スポットを、該照射箇所から離間した場所に移動させることによって実現される、請求項6に記載の方法。
- 割り込み期間によって分離された少なくとも2つのバースト期間内にEUVパルスを生成する極紫外(EUV)光源であって、
各バースト期間中及び前記割り込み期間中にターゲット材料の小滴を生成する小滴発生器と、
各バースト期間中及び前記割り込み期間中にレーザーパルスを生成するレーザー源と、
レーザーパルスがターゲット材料と、EUV出力を生成するように相互作用するバースト期間構成から、光パルスがターゲット材料と、EUV出力を生成するように相互作用しない割り込み期間へと前記EUV光源を再構成するように動作可能なシステムと、
を備えるEUV光源。 - 前記システムは、前記バースト期間の間に前記割り込み期間とは異なる、小滴位置に対するレーザートリガタイミングを与える、請求項10に記載のEUV光源。
- 前記トリガタイミングは、前記割り込み期間内に前記バースト期間に対して遅延される、請求項11に記載のEUV光源。
- 前記トリガタイミングは、前記割り込み期間に前記バースト期間に対して進められる、請求項11に記載のEUV光源。
- 小滴は、バースト期間中に照射箇所に向かって第1の経路に沿って移動し、前記システムは、前記割り込み期間中に前記照射箇所と交差しない第2の経路へと小滴を経路変更する、請求項10に記載のEUV光源。
- 前記システムは、前記割り込み期間中に小滴を帯電させ、電場、磁場、又はこれらの組み合わせからなる場のグループから選択された場を用いて、小滴を前記第1の経路から偏向する、請求項14に記載のEUV光源。
- 前記小滴発生器はノズルを含み、前記システムは、該ノズルを移動させるアクチュエータを備える、請求項14に記載のEUV光源。
- 前記システムは、小滴を経路変更するためのガス流を備える、請求項14に記載のEUV光源。
- 前記レーザーパルスは、バースト期間中に照射箇所にある集束スポットに集束され、前記システムは、前記割り込み期間中に該集束スポットを、該照射箇所から離間した場所に移動させる、請求項10に記載のEUV光源。
- 前記レーザーパルスは、少なくとも1つの集束光学体を用いて集束され、前記システムは、少なくとも1つの集束光学体を移動させて前記集束スポットの場所を変更する、請求項18に記載のEUV光源。
- 前記レーザーパルスは、少なくとも1つの操向光学体を用いて操向され、前記システムは、少なくとも1つの操向光学体を移動させて前記集束スポットの場所を変更する、請求項18に記載のEUV光源。
- 前記システムは、前記バースト期間の間に前記割り込み期間とは異なる、小滴位置に対するレーザートリガタイミングを与え、前記レーザーパルスは、バースト期間中に照射箇所にある集束スポットに集束され、前記割り込み期間中に該集束スポットを、該照射箇所から離間した場所に移動させる、請求項10に記載のEUV光源。
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US40456410P | 2010-10-04 | 2010-10-04 | |
US61/404,564 | 2010-10-04 | ||
US13/157,233 US8653437B2 (en) | 2010-10-04 | 2011-06-09 | EUV light source with subsystem(s) for maintaining LPP drive laser output during EUV non-output periods |
US13/157,233 | 2011-06-09 | ||
PCT/US2011/050565 WO2012050685A1 (en) | 2010-10-04 | 2011-09-06 | Method for lpp drive laser output during euv non-output periods |
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US8653437B2 (en) * | 2010-10-04 | 2014-02-18 | Cymer, Llc | EUV light source with subsystem(s) for maintaining LPP drive laser output during EUV non-output periods |
US10966308B2 (en) * | 2010-10-04 | 2021-03-30 | Asml Netherlands B.V. | EUV light source with subsystem(s) for maintaining LPP drive laser output during EUV non-output periods |
CN104488362B (zh) * | 2012-05-21 | 2017-05-10 | Asml荷兰有限公司 | 辐射源 |
WO2014042003A1 (ja) | 2012-09-11 | 2014-03-20 | ギガフォトン株式会社 | 極端紫外光生成方法及び極端紫外光生成装置 |
DE102012217120A1 (de) | 2012-09-24 | 2014-03-27 | Trumpf Laser- Und Systemtechnik Gmbh | EUV-Strahlungserzeugungsvorrichtung und Betriebsverfahren dafür |
DE102012217520A1 (de) | 2012-09-27 | 2014-03-27 | Trumpf Laser- Und Systemtechnik Gmbh | Strahlführungseinrichtung und Verfahren zum Einstellen des Öffnungswinkels eines Laserstrahls |
NL2011533A (en) * | 2012-10-31 | 2014-05-06 | Asml Netherlands Bv | Method and apparatus for generating radiation. |
JP6010438B2 (ja) * | 2012-11-27 | 2016-10-19 | 浜松ホトニクス株式会社 | 量子ビーム生成装置、量子ビーム生成方法、及び、レーザ核融合装置 |
TWI618453B (zh) * | 2013-01-10 | 2018-03-11 | Asml荷蘭公司 | 用以調整雷射光束脈衝時序以調節極端紫外光劑量之方法及系統 |
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JP6195474B2 (ja) | 2013-05-31 | 2017-09-13 | ギガフォトン株式会社 | 極端紫外光生成装置及び極端紫外光生成システムにおけるレーザシステムの制御方法 |
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JP2016174006A (ja) | 2016-09-29 |
EP2624913A4 (en) | 2014-03-26 |
JP6182645B2 (ja) | 2017-08-16 |
WO2012050685A1 (en) | 2012-04-19 |
US8653437B2 (en) | 2014-02-18 |
KR101884706B1 (ko) | 2018-08-30 |
EP2624913A1 (en) | 2013-08-14 |
EP2624913B1 (en) | 2019-08-21 |
TWI530231B (zh) | 2016-04-11 |
US9390827B2 (en) | 2016-07-12 |
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US20140145096A1 (en) | 2014-05-29 |
US20120080584A1 (en) | 2012-04-05 |
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