WO2005020644A1 - Euv光源 - Google Patents
Euv光源 Download PDFInfo
- Publication number
- WO2005020644A1 WO2005020644A1 PCT/JP2004/011905 JP2004011905W WO2005020644A1 WO 2005020644 A1 WO2005020644 A1 WO 2005020644A1 JP 2004011905 W JP2004011905 W JP 2004011905W WO 2005020644 A1 WO2005020644 A1 WO 2005020644A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light source
- ray
- secondary target
- rays
- ray tube
- Prior art date
Links
Classifications
-
- G—PHYSICS
- 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
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70008—Production of exposure light, i.e. light sources
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G2/00—Apparatus or processes specially adapted for producing X-rays, not involving X-ray tubes, e.g. involving generation of a plasma
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01013—Aluminum [Al]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01019—Potassium [K]
Definitions
- the present invention relates to a light source that generates EUV (Extreme UltraViolet) having a wavelength of about 13.5 nm.
- EUV Extra UltraViolet
- a laser plasma light source that irradiates liquefied Xe (xenon) with a YAG laser to generate EUV having a wavelength of 13.5 nm is being developed (for example, see Patent Document 1). Paragraph 0003).
- a diffraction grating, an artificial multilayer film, and a filter are required as an evaluation optical system.
- a light source for evaluation a light source that generates EUV with a wavelength of about 13.5 nm is required.
- Light sources for this evaluation include SR (Synchrotron Radiation) light, discharge plasma, and a light source that emits an electron beam to a Si target to generate EUV.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-185798
- the present invention has been made in view of the above-described conventional problems, and provides an EUV light source that can stably generate EUV having a sufficient intensity with a simple structure, and is an alternative to a laser plasma light source.
- the purpose is to:
- an EUV light source includes an X-ray tube having a primary target, and a secondary target irradiated with X-rays generated from the X-ray tube. Secondary The target generates one fluorescent X-ray selected from the group consisting of Be- ⁇ -ray, Si-L-ray and ⁇ 1-L-ray.
- a secondary target is irradiated with X-rays from an X-ray tube, and EUV is used as Be—K a line (wavelength: 11.4 nm), Si_L line (wavelength: 13.55 nm) or A1-L Since it generates lines (wavelength 17.14 nm), it can generate EUV of sufficient intensity stably with a simple structure, and can be used in place of a laser plasma light source (wavelength 13.5 nm).
- X-rays generated from the X-ray tube excite Si-K shell electrons in the secondary target and generate Si-L lines by cascade excitation.
- the oxide film on the surface of the secondary target is removed.
- the X-rays generated from the X-ray tube are condensed by a polycavity and irradiated to a secondary target.
- the X-rays generated from the secondary target be monochromated into the one fluorescent X-ray by an artificial multilayer film or a total reflection mirror.
- FIG. 1 is a schematic view of an EUV light source according to an embodiment of the present invention.
- this light source includes an X-ray tube 1 having Mo, Rh, Pd or Cr as a primary target, and an X-ray 2 generated from the X-ray tube 1 (depending on the primary target, Mo—L line (wavelength 0.541 nm), Rh-La line (wavelength 0.460 nm), Pd-La line (wavelength 0.437 nm) or Cr-a line (wavelength 0.229 nm) And a secondary target 4 of Si to be irradiated with, and from the secondary target 4, a Si—L line 5 which is a fluorescent X-ray as EUV is generated.
- this light source including the secondary target 4 is used in a vacuum, an oxide film is reapplied on the surface of the Si secondary target 4 during use after removal. It is never formed.
- Be- ⁇ rays or A1-L rays may be generated as EUV. In this case, Be or A1 is used for the secondary target 4.
- Be-— shells are directly excited by X-rays 2 from X-ray tube 1 without using cascade excitation.
- cascade excitation is used as in the case of Si-L lines.
- the X-rays 2 generated from the X-ray tube 1 are condensed by the polycabillary 4 and irradiated to the secondary target 4.
- the X-rays 5 generated from the secondary target 4 include force-multilayer films (including Si—K rays and scattered X-rays 2 generated from the X-ray tube 1 in addition to the intended Si—L rays). Here, it can be monochromaticized to Si-L line by Bragg reflection at 6).
- the Si-L line that has been Bragg-reflected by the artificial multilayer film 6 is totally reflected by a total reflection mirror (here, a curved type) 7, passes through a slit 8 as a focal point, and irradiates, for example, a diffraction grating 10 to be evaluated.
- the light is diffracted and is incident on the CCD 9, which is a detector, while being focused.
- the Si-L line that has passed through the slit 8 is Bragg-reflected when the evaluation target is an artificial multilayer film, and is filtered and input to the CCD 9 when the evaluation target is a filter.
- an X-ray detector such as an F-PC may be used instead of the CCD as the detector.
- the artificial multilayer film 6 and the total reflection mirror 7 are arranged in a so-called KB (Kirkpatrick-Baez) arrangement so that the vertical component and the horizontal component of the X-ray 5 generated from the secondary target 4 are independently condensed. I have. Also, if both the artificial multilayer film 6 and the total reflection mirror 7 reflect at the Brewster angle, the intensity of the Si—L line after reflection at the total reflection mirror 7 is lost, so that at least one of the reflection angles is Brewster's angle. Set off the corner. The X-rays 5 generated from the secondary target 4 have longer wavelengths than the Si-L lines and hardly contain X-rays. Therefore, instead of using the artificial multilayer film 6, a total reflection mirror is used.
- the secondary target 4 and the X-ray 5 generated by the second total reflection mirror 7 are totally reflected twice, so that X-rays with shorter wavelengths than Si-L lines (Si-K X-rays 2 scattered rays generated from 1) can be removed, and as a result, monochromatic shading can be performed on Si-L lines. Furthermore, if the detector 9 has a sufficiently high energy resolution, it is not necessary to monochromatize it. The light can enter the slit 8 as it is. [0013] According to the light source of this embodiment, the secondary target 4 of Si is irradiated with the X-ray 2 from the X-ray tube 1, and the Si-L line (wavelength 13.55 nm) 5 is generated as EUV.
- EUV5 With a simple structure, EUV5 with sufficient intensity can be generated stably, and can be used as an alternative to a laser plasma light source (wavelength: 13.5 nm).
- the X-rays 2 generated from the X-ray tube 1 excite the electrons of the Si—K shell in the secondary target 4 and generate the Si—L lines 5 by cascade excitation. Since there is no oxide film on the surface of the get 4, EUV5 can be generated particularly efficiently.
- the X-rays 2 generated from the X-ray tube 1 are condensed to a diameter of, for example, about 150 zm by the polycabillary 3 and irradiated to the secondary target 4, as an alternative to the laser plasma light source which is condensed minutely, More preferred.
- the X-rays 5 generated from the secondary target 4 are converted into monochromatic Si-L lines by the artificial multilayer film 6, so that the detector 9 does not require energy resolution.
- the secondary target may be irradiated without condensing the X-rays from the X-ray tube without using a polycapillary or the like.
- the optical system may be a system based on a parallel method instead of a concentrated method (a system using a flat artificial multilayer film or a total reflection mirror and a solar slit).
- the number of artificial multilayer films or total reflection mirrors used need not be two or more, but may be one.
- X-rays from an X-ray tube are irradiated onto a secondary target without being condensed, and the X-ray force generated from the secondary target passes through a solar slit and is monochromatic to EUV with a single flat artificial multilayer film EUV light sources that are converted and irradiated to the evaluation object are also included in the present invention.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- X-Ray Techniques (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005513294A JPWO2005020644A1 (ja) | 2003-08-25 | 2004-08-19 | Euv光源 |
US10/568,087 US20080152090A1 (en) | 2003-08-25 | 2004-08-19 | Euv Light Source |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003299927 | 2003-08-25 | ||
JP2003-299927 | 2003-08-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005020644A1 true WO2005020644A1 (ja) | 2005-03-03 |
Family
ID=34213792
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/011905 WO2005020644A1 (ja) | 2003-08-25 | 2004-08-19 | Euv光源 |
Country Status (3)
Country | Link |
---|---|
US (1) | US20080152090A1 (ja) |
JP (1) | JPWO2005020644A1 (ja) |
WO (1) | WO2005020644A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100561151C (zh) * | 2008-07-16 | 2009-11-18 | 中国科学院上海光学精密机械研究所 | 极紫外波段发射效率测量装置 |
DE102012219936A1 (de) * | 2012-10-31 | 2014-04-30 | Carl Zeiss Smt Gmbh | EUV-Lichtquelle zur Erzeugung eines Nutz-Ausgabestrahls für eine Projektionsbelichtungsanlage |
US10748734B2 (en) * | 2016-09-05 | 2020-08-18 | Stellarray, Inc. | Multi-cathode EUV and soft x-ray source |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000088777A (ja) * | 1998-09-08 | 2000-03-31 | Hyogo Kagaku Gijutsu Kyokai | X線撮像装置 |
US20030142781A1 (en) * | 2002-01-31 | 2003-07-31 | Naoki Kawahara | X-ray fluorescence spectrometer for semiconductors |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5754620A (en) * | 1996-09-13 | 1998-05-19 | Advanced Micro Devices, Inc. | Apparatus and method for characterizing particles embedded within a thin film configured upon a semiconductor wafer |
JP3603278B2 (ja) * | 2001-09-06 | 2004-12-22 | 理学電機工業株式会社 | 蛍光x線分析システムおよびそれに用いるプログラム |
US7245696B2 (en) * | 2002-05-29 | 2007-07-17 | Xradia, Inc. | Element-specific X-ray fluorescence microscope and method of operation |
-
2004
- 2004-08-19 WO PCT/JP2004/011905 patent/WO2005020644A1/ja active Application Filing
- 2004-08-19 US US10/568,087 patent/US20080152090A1/en not_active Abandoned
- 2004-08-19 JP JP2005513294A patent/JPWO2005020644A1/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000088777A (ja) * | 1998-09-08 | 2000-03-31 | Hyogo Kagaku Gijutsu Kyokai | X線撮像装置 |
US20030142781A1 (en) * | 2002-01-31 | 2003-07-31 | Naoki Kawahara | X-ray fluorescence spectrometer for semiconductors |
Also Published As
Publication number | Publication date |
---|---|
US20080152090A1 (en) | 2008-06-26 |
JPWO2005020644A1 (ja) | 2007-11-01 |
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