WO2000019482A1 - Microscope electronique a balayage - Google Patents
Microscope electronique a balayage Download PDFInfo
- Publication number
- WO2000019482A1 WO2000019482A1 PCT/JP1998/004297 JP9804297W WO0019482A1 WO 2000019482 A1 WO2000019482 A1 WO 2000019482A1 JP 9804297 W JP9804297 W JP 9804297W WO 0019482 A1 WO0019482 A1 WO 0019482A1
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- WO
- WIPO (PCT)
- Prior art keywords
- electron
- sample
- electrode
- electrons
- scanning
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/02—Details
- H01J37/244—Detectors; Associated components or circuits therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/26—Electron or ion microscopes; Electron or ion diffraction tubes
- H01J37/28—Electron or ion microscopes; Electron or ion diffraction tubes with scanning beams
Definitions
- the present invention relates to an electron beam apparatus, and in particular, to a scanning type suitable for detecting secondary electrons and reflected electrons generated from a sample with high efficiency and obtaining a high-resolution image with high contrast.
- a scanning type suitable for detecting secondary electrons and reflected electrons generated from a sample with high efficiency and obtaining a high-resolution image with high contrast.
- the scanning electron microscope accelerates the electrons emitted from the electron source, converges them with an electrostatic lens or a magnetic field lens to form a narrow electron beam (primary electron beam), and converts this primary electron beam using a scanning deflector. Scans on the sample to be observed, detects secondary signals secondary to the sample by primary electron beam irradiation, and adjusts the detected signal intensity to the brightness modulation of the CRT that is scanned in synchronization with the primary electron beam scanning. This is a device that obtains a two-dimensional scan image.
- the secondary signal generated from the sample by the irradiation of the primary electron beam has a wide energy distribution.
- the next shot of the material that has been shot by the subject is elastically scattered by the source of the body ⁇ ) ⁇ , and some electrons jump out of the sample surface. This is called a reflected electron, and has energy equal to or somewhat higher than the primary electron beam.
- the primary electrons incident on the sample interact with the atoms in the sample, and the electrons in the sample are excited to obtain kinetic energy and are emitted to the outside. This is called a secondary electron and has an energy ranging from 0 eV to about 50 eV.
- Japanese Patent Application Laid-Open No. 7-192679 discloses that a deflector that deflects a secondary signal off-axis is used to separate the trajectories of the secondary electrons and the reflected electrons, and to separate the orbits on the orbits.
- a technique has been disclosed in which detectors are arranged to selectively detect secondary electrons and reflected electrons.
- Japanese Patent Application Laid-Open No. 8-273569 discloses a technique in which an annular detector divided above an objective lens is provided, and secondary electrons and reflected electrons are separated and detected using the convergence action of the objective lens. ing.
- Reflected electrons or secondary electrons have their own unique information due to the difference in their causes. According to the technique disclosed in the above-mentioned document, a sample image based on unique information can be formed by selectively detecting reflected electrons or secondary electrons. Invention I '
- the objective lenses disclosed in the above three documents all have a lens gap (gap between magnetic poles) formed in a direction perpendicular to the optical axis of the primary electron beam. There is also a problem that the distance (focal length) between them becomes longer.
- the present invention has been made to solve the problems described above, and has as its object to provide a scanning electron microscope that detects reflection generated at a shallow angle from a sample without increasing the focal length. It is.
- the present invention forms an electron source, a scanning deflector for scanning a primary electron beam generated from the electron source on a sample, and a converging magnetic field for converging the primary electron beam on the sample surface.
- a scanning electron microscope that obtains a two-dimensional scanning image of the sample, including an objective lens that emits light, and a secondary signal detector that detects a secondary signal generated from the sample by irradiation with the primary electron beam.
- a scanning electron microscope characterized in that an electrode for generating secondary electrons due to collision of the electron beam is arranged between the objective lens and the secondary electron detector.
- FIG. 1 is a schematic view of an embodiment of the present invention, showing a scanning electron microscope provided with an in-lens type objective lens.
- FIG. 2 is a diagram showing a schematic view of an embodiment in which secondary electron conversion electrodes (conductive members) are arranged.
- FIG. 3 is a diagram showing electrons generated from a sample when irradiated with a primary electron beam and their energy distribution.
- FIG. 4 is a diagram showing a schematic view of an embodiment in which the secondary electron conversion electrode is divided into a plurality.
- FIG. 5 is a schematic view of an embodiment of the present invention, showing a scanning electron microscope equipped with an open-pole type objective lens.
- the reflected electrons generated at an angle smaller than the sample can be detected by forming a convergent magnetic field of the objective lens on the sample surface, and connecting the secondary electron conversion electrode (reflector) to the objective lens. And the secondary electron detector.
- the reflected electrons reflected from the sample at a shallow angle form a spiral trajectory by the convergence action of the objective lens.
- a conversion electrode that converts reflected electrons into secondary electrons is placed on this orbit, and reflected electrons that are reflected from the sample at a shallow angle are converted into secondary electrons. Can be detected by the secondary electron detector.
- the secondary electron conversion electrodes and the backscattered electron detectors disclosed in Japanese Patent Application Laid-Open Nos. 7-192679 and 9-1711791 are all mounted on the secondary electron detector. (Electron source side), a large gap is created between the sample surface and the secondary electron conversion electrode or backscattered electron detector, and the reflected electrons generated at a shallow angle from the sample are captured. Can not do it.
- the gap between the magnetic poles (lens gap) is opened in a direction perpendicular to the optical axis of the electron beam, so that the maximum convergence to the primary electron beam is achieved. Since the magnetic field is formed at almost the same height as the objective lens, a strong convergent magnetic field cannot be formed on the sample surface, and no spiral motion can be given to reflected electrons generated at a shallow angle from the sample.
- the objective lens of this shape has a problem in that the distance (focal length) between the sample and the main surface of the lens becomes longer, so that the aberration of the primary electron beam increases.
- the lens gap of the objective lens is directed in a direction perpendicular to the optical axis. Since the aperture is open, there is a problem that the focal length of the primary electron beam becomes longer. Another problem is that it is difficult to shorten the focal length of the objective lens because the electrostatic objective lens is interposed between the main lens surface and the sample.
- backscattered electrons generated at a shallow angle with respect to the sample (backscattered electrons generated at a high angle with respect to the optical axis) produce a signal reflecting the unevenness information of the sample and internal information of the sample.
- backscattered electrons generated at a shallow angle with respect to the sample backscattered electrons generated at a high angle with respect to the optical axis
- FIG. 1 is a schematic view of an embodiment of the present invention, in which a sample is placed between magnetic poles.
- This figure shows an example in which a scanning electron microscope employing an objective lens (hereinafter referred to as an in-lens) has two detecting means disposed closer to the electron source than the objective lens.
- an in-lens a scanning electron microscope employing an objective lens
- the in-lens type objective lens is employed in this embodiment.
- the objective lens is suitable for forming a strong converging magnetic field on the sample surface.
- an objective lens having a lens gap opened downward as shown in FIG. 5 (hereinafter referred to as a lower magnetic pole open type lens) may be used.
- An open-pole-type lens is an objective lens in which the gap (lens gap) between the upper and lower magnetic poles is open at least toward the sample surface.
- the maximum focusing magnetic field for the primary electron beam is formed below the lower magnetic pole.
- An in-lens type objective lens and an open-pole type objective lens can shorten the distance (focal length) between the sample and the main surface of the lens, thereby reducing the aberration of the primary electron beam.
- gold particles are sputter-coated on the backscattered electron detection surface of the backscattered electron detector (YAG) for several nm to several 10 nm.
- the primary electron beam 2 generated from the electron source 1 is scanned by the deflection coils 3 a and 3 b arranged in two stages, and converged on the sample 6 by the objective lens 4.
- the irradiation of the primary electron beam 2 generates secondary electrons 20 and reflected electrons 8 a and 8 b 1 from the sample 6.
- backscattered electrons 8a are low-angle components generated at a shallow angle from the sample
- reflected electrons 8b are high-angle components generated at a high angle from the sample.
- the reflected electrons generated at a high angle with respect to the sample are signals reflecting the composition information of the sample.
- Two reflectors are provided to detect not only generated backscattered electrons but also backscattered electrons reflected almost in the optical axis direction.
- the secondary electrons 20 are wound up toward the electron source by the magnetic field generated by the objective lens 4 and travel, and are deflected by the secondary electron deflector 12 a to the secondary electron detector 5 ai to detect the secondary electrons. 5a is detected.
- the reflected electrons 8 a collide with the secondary electron conversion electrode 7 arranged above the objective lens 4 and generate secondary electrons 9 a.
- the secondary electrons 9a are guided to the secondary electron deflector 12a by the pull-up electrode 13 to which a positive voltage is applied by the voltage applying means 11b, and deflected by the secondary electron deflector 12a. And is detected by the secondary electron detector 5a.
- an EXB deflector direct electromagnetic field
- the deflector comprises a pair of electrodes (not shown) and a magnetic field generating means (not shown) for forming a magnetic field orthogonal to an electric field formed between the pair of electrodes.
- This orthogonal electromagnetic field generator is disclosed, for example, in Japanese Patent Application Laid-Open No. Hei 9-171179.
- the reflected ⁇ / ⁇ 8 bi (high-angle component) travels straight without being greatly affected by the secondary ⁇ 2 ⁇ ⁇ M-director 12 a, and the secondary placed above the deflection coils 3 a and 3 b Deflected by the electron deflector 1 2 b and reflected electron detector 1 8
- the sputter coating surface of heavy metals such as gold has a high secondary electron generation efficiency and enables detection by converting reflected electrons that cannot pass through the coating surface into secondary electrons.
- the electron 8 b 2 which has the highest energy among the high-angle components of the backscattered electrons, passes through the gold particle sputter-coated surface 17 and returns to the backscattered electron detector 18. Is detected by Reflected electrons (electrons with the lowest energy among high-angle components) that cannot pass through the gold particle sputter-coated surface 17 and are converted into secondary electrons 9 b 1 are detected by the secondary electron detector 5 b. You. This configuration makes it possible to discriminate between high-energy backscattered electrons and low-energy backscattered electrons in high-angle backscattered electrons.
- a positive voltage is applied to the secondary electron conversion electrode 7 by the voltage control means 11a, and the voltage (potential) of the pull-up electrode 13 is set to a value lower than the voltage (potential) of the secondary electron conversion electrode 7.
- the secondary electrons 9 a generated by the collision of the reflected electrons 8 a will not reach the linear electron deflector 12 a due to the action of the electric field between the lifting electrode 13 and the secondary electron conversion electrode 7. Not detected. Therefore, the state in which the secondary electrons 20 are detected can be maintained, and the secondary electrons 9a having low-angle backscattered electron information from the sample can be detected or can be selected without detection.
- the secondary electrons 20 generated from the sample are subjected to the convergence action of the convergence magnetic field of the objective lens 4 and rise almost toward the electron source along the optical axis. It is detected by the secondary electron detector 5a without being sucked into the detector.
- the secondary electrons 20 generated from the sample 6 are reduced due to the negative potential of the secondary electron conversion electrode 7. It does not reach the secondary electron deflector 12a and is not detected by the secondary electron detector 5a.
- the potential of the lifting electrode 13 is controlled to a value higher than the potential of the secondary electron conversion electrode 7, the secondary electrons 9 a generated from the secondary electron conversion electrode 7 will be converted to the secondary electron deflector 12 a And is deflected by the action of the secondary electron deflector 12a and detected by the secondary electron detector 5a. Therefore, secondary electron conversion
- the secondary electrons 20 from the sample and the secondary electrons 9 a having low-angle reflected electron information can be individually detected or synthesized. It becomes possible to select to detect.
- the low-angle component contains the unevenness information on the sample surface
- the high-angle component contains the composition information on the sample surface.
- those with high energy contain composition information from the surface of the sample, and those with low energy contain composition information from inside the sample.
- the selective detection of each component of the secondary electron and the reflected electron is performed by the voltage control means so that a relative voltage difference is generated between the secondary electron conversion electrode 7, the lifting electrode 13 and the secondary electron deflector 12 respectively. This is performed by controlling the applied voltage according to 1 1. Then, the detection signals of the secondary electrons 20 and the reflected electrons 8 are subjected to signal selection, synthesis or coloring by the signal processing means 14, and are sent to the display device 15.
- the secondary electron conversion electrode 7 is formed in a cylindrical shape having a passage for the primary electron beam 2, and the opening on the electron source side is enlarged.
- the inner surface of the cylindrical body is the secondary electron conversion surface.
- the reason for forming the cylindrical shape is to more reliably capture the reflected electrons 8a at a one-angle angle, which scatter in a spiral orbit.
- the secondary electron conversion electrode (reflector) and the detector disclosed in Japanese Patent Application Laid-Open No. 9-171791 and Japanese Patent Application Laid-Open No. 8-273569 are used in a direction perpendicular to the optical axis of the electron beam. Sprays in a spiral trajectory because a secondary electron conversion surface and detection surface are formed The detection range for the reflected electrons 8a at a low angle becomes narrower. In order to make these conversion surfaces and detection surfaces large, it is necessary to increase the diameter of the electron microscope lens barrel, but it is necessary to maintain a high vacuum. It is practically difficult to make it big.
- the detection surface of low-angle reflected electrons that draws a spiral trajectory under the influence of the convergent magnetic field of the objective lens is increased. And the detection efficiency can be improved.
- the secondary electrons 9a converted by the secondary electron conversion electrode 7 can be easily guided to the secondary electron detector 5a side.
- the apparatus converts the reflected electrons into secondary electrons by colliding with the secondary electron conversion electrodes, and deflects the secondary electrons by a secondary electron deflector to a secondary electron detector to detect the reflected electrons. are doing.
- the reason that the reflected electrons are converted to secondary electrons and then detected is that if a strong electric field is applied to the secondary electron beam to deflect (attract) the reflected electrons to the secondary electron detector, the primary electron beam will This is because energy dispersion occurs, and in order to prevent energy dispersion, electrons must be deflected (attracted) to the detector by a weak electric field.
- FIG. 2 is a diagram showing an example of arrangement of secondary electron conversion electrodes for explaining the principle of the present invention in more detail.
- the reflected electrons generated from the sample 6 by the irradiation of the primary electron beam 2 have an angular distribution, and the trajectory varies depending on the generated angle.
- the reflected electrons generated from the sample take a helical trajectory under the influence of the objective lens magnetic field, and leave the helical trajectory when the influence of the objective lens magnetic field is reduced.
- the backscattered electrons (low angle component) generated at a shallow angle from the sample are spiral gauges.
- the orbit collides with the objective lens magnetic path (low-angle reflected-electron component 8a1) and orbits far away from the optical axis (low-angle reflected-electron component 8a2).
- the secondary electron conversion electrode 7 By arranging the secondary electron conversion electrode 7 on this orbit, the low-angle reflected electrons 8 a 1 and 8 a 2 are converted into secondary electrons 9 a 1 and 9 a generated by collision with the secondary electron conversion electrode. As 2, it can be detected by the secondary electron detector 5.
- the high-angle reflected electrons 8b generated at a high angle from the sample take a trajectory close to the optical axis even after being affected by the magnetic field of the objective lens, so the detection described later, which is arranged further above the secondary electron detector 5 Detect by means.
- FIG. 3 is a graph showing the number of electrons generated from the sample and its energy distribution when the sample is irradiated with a primary electron beam.
- the energy of reflected electrons is higher than the energy of secondary electrons, and the energy loss due to collision with the sample is small.
- the high-angle component has less loss and has a higher energy band than the mouth-angle component.
- FIG. 4 shows an embodiment in which the secondary electron conversion electrode 7 (conductive member) is divided into a plurality of parts and means for applying a voltage to each part is arranged.
- a mesh through which electrons can pass is formed around the optical axis inside the secondary electron conversion electrode 7. Electrodes 16 are arranged.
- the reflected electrons 8 (long-angle component) generated from the sample 6 by the irradiation of the primary electron beam 2 collide with the secondary electron conversion electrode 7 and generate secondary electrons 9.
- the angle distribution of the reflected electrons 8a (low angle component) changes due to the unevenness and inclination of the sample "", and the collision position distribution on the secondary electron conversion electrode 7 also changes. Therefore, as in the present embodiment, the secondary electron conversion electrode 7 is divided into a plurality (7a to 7d, 7al to 7a2), and the voltage of the secondary electron conversion electrode 7 is By controlling relative to the voltage of 16, the secondary electrons 9 generated on the linear electron conversion electrode 7 due to the collision of the backscattered electrons 8 can be selectively introduced. It is possible to obtain a sample image in which the inclination is enhanced.
- the voltage control means 1 1 when it is desired to detect only the reflected electrons 7a1 colliding with the secondary electron conversion electrode 7a1 in the secondary electron conversion electrodes 7a1 and 7a2, the voltage control means 1 1 Thus, the voltage applied to the secondary electron conversion electrode 7a2 is controlled to be higher than the voltage of the electrode 16, and the voltage of the secondary electron conversion electrode 7a1 is controlled to be lower than the voltage of the electrode 16.
- Secondary ⁇ 2 end-conversion 'electrode 7 a 2 is not detected because it is not pulled up in the detector direction due to a relative potential difference due to the relative potential difference-9 a 2 Secondary electrons 9 a 1 generated on a 1 are pulled up in the detector direction and detected because of the relative potential difference (the voltage of the linear electron conversion electrode 7 a 1 is lower than the voltage of electrode 16). . Further, by disposing the electrode 16, it is possible to prevent a deflection electric field from being generated on the optical axis when a different voltage is applied to each element of the electrode 7.
- Fig. 5 shows a secondary electron conversion electrode 10 placed on the side of the electron source 1 from the secondary electron deflector, and detection by converting high-angle reflected electrons to secondary electrons.
- the primary electron beam 2 generated from the electron source 1 is scanned by deflection coils 3 a and 3 b arranged in two stages, and focused on a sample 6 by an objective lens 4.
- Irradiation of the primary electron beam 2 generates secondary electrons 20 and IT reflected electrons 8 a and 8 b from the sample 6.
- reflected electrons 8a are low-angle components generated at a shallow angle from the sample
- reflected electrons 8b are high-angle components generated at a high angle from the sample.
- the secondary electrons 20 are wound up toward the electron source by the magnetic field generated by the objective lens 4 and travel there, and are deflected by the secondary electron deflector 12 to the linear electron detector 5 to be secondary electrons. Detected by detector 5.
- the reflected electrons 8 a collide with the secondary electron conversion electrode 7 arranged above the objective lens 4 to generate secondary electrons 9 a.
- the secondary electrons 9a are guided to the secondary electron deflector 12 by the pull-up electrode 13 to which a positive voltage is applied by the voltage applying means 11b, deflected, and detected by the secondary electron detector 5. Is done.
- the reflected electrons 8 b collide with the secondary electron conversion electrode 10 arranged above the secondary electron deflector 12, and generate secondary electrons 9 that are RI-like.
- the secondary electrons 9 b are deflected by the secondary electron deflector 12 and detected by the secondary electron detector 5.
- a positive voltage is applied to the secondary electron conversion electrode 7 by the voltage control means 11a, and the voltage (potential) of the pull-up electrode 13 is set to a value lower than the voltage (potential) of the secondary electron conversion electrode 7.
- the secondary electrons 9 a generated by the collision of the reflected electrons 8 a cannot reach the secondary electron deflector 12 due to the action of the electric field between the lifting electrode 13 and the secondary electron conversion electrode 7. Since the secondary electrons 9a are not detected, it is possible to select the necessity of detecting the secondary electrons 9a having low-angle reflected electron information from the sample while maintaining the state where the secondary electrons 20 are detected.
- the secondary electrons 20 generated from the sample 6 are reduced due to the negative potential of the secondary electron conversion electrode 7. It does not reach the secondary electron deflector 12 and is not detected by the secondary electron detector 5.
- the potential of the lifting electrode 13 is controlled to a value higher than the potential of the secondary electron conversion electrode 7—, the secondary electrons 9a generated from the secondary electron conversion electrode 7 will be converted to the secondary electron deflector 1 2 And is deflected by the operation of the secondary electron deflectors 12 and detected by the secondary electron detector 5.
- the secondary electrons 20 from the sample and the secondary electrons 9 a having low-angle reflected electron information are detected independently. It is possible to select to combine or detect by combining.
- the secondary electrons 9b generated by the collision of the reflected electrons 8b are converted into a secondary electron deflector by the action of the electric field. Since it does not reach 12 and is not detected, it can be detected separately from the secondary electron 20 and the secondary electron 9a.
- the secondary electron conversion electrode 10 is structured so that it can be put in and out of the vacuum and high-angle electron information is not required, the secondary electron conversion electrode 10 is moved away from the optical axis so that reflected electrons do not collide. Even in this case, high-angle reflected electronic information can be selected. In this case, there is no need to control the voltage of the secondary electron conversion electrode 10.
- the voltages applied to the secondary electron conversion electrode 7 and the lifting electrode 13, the secondary electron deflector 12, and the secondary electron conversion electrode 10 are controlled by voltage control so that a relative voltage difference is generated between them. Controlled by means 1 1.
- the secondary electrons detected by the secondary electron detector 5 are converted into electric signals, and then displayed on the display device 15 via the signal processing means 14.
- a sample image can be formed by a combination of two or more of these electrons.
- reflected electrons can be selected according to their generation angle and energy without increasing the focal length, and information is obtained by dividing the information into composition information and shape information. It becomes possible.
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP1998/004297 WO2000019482A1 (fr) | 1998-09-25 | 1998-09-25 | Microscope electronique a balayage |
JP2000572892A JP4300710B2 (ja) | 1998-09-25 | 1998-09-25 | 走査形電子顕微鏡 |
US09/462,769 US6501077B1 (en) | 1998-09-25 | 1998-09-25 | Scanning electron microscope |
EP98944234.8A EP1117125B1 (en) | 1998-09-25 | 1998-09-25 | Scanning electron microscope |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP1998/004297 WO2000019482A1 (fr) | 1998-09-25 | 1998-09-25 | Microscope electronique a balayage |
Publications (1)
Publication Number | Publication Date |
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WO2000019482A1 true WO2000019482A1 (fr) | 2000-04-06 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP1998/004297 WO2000019482A1 (fr) | 1998-09-25 | 1998-09-25 | Microscope electronique a balayage |
Country Status (4)
Country | Link |
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US (1) | US6501077B1 (ja) |
EP (1) | EP1117125B1 (ja) |
JP (1) | JP4300710B2 (ja) |
WO (1) | WO2000019482A1 (ja) |
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US6903337B2 (en) | 2001-07-02 | 2005-06-07 | Carl Zeiss Smt Ag | Examining system for the particle-optical imaging of an object, deflector for charged particles as well as method for the operation of the same |
DE10131931A1 (de) * | 2001-07-02 | 2003-01-16 | Zeiss Carl | Untersuchungssystem zum teilchenoptischen Abbilden eines Objekts, Ablenkvorrichtung für geladene Teilchen sowie Verfahren zum Betrieb derselben |
JP2007059111A (ja) * | 2005-08-23 | 2007-03-08 | Jeol Ltd | 走査電子顕微鏡 |
JP4721821B2 (ja) * | 2005-08-23 | 2011-07-13 | 日本電子株式会社 | 走査電子顕微鏡及び走査電子顕微鏡における信号検出方法 |
JP2008159568A (ja) * | 2006-09-19 | 2008-07-10 | Carl Zeiss Nts Gmbh | 微小化構造を有する物体を検査及び加工するための電子顕微鏡、並びに、当該物体の製造方法 |
US8207498B2 (en) | 2006-10-26 | 2012-06-26 | Hitachi High-Technologies Corporation | Electron beam apparatus and electron beam inspection method |
US8431893B2 (en) | 2006-10-26 | 2013-04-30 | Hitachi High-Technologies Corporation | Electron beam apparatus and electron beam inspection method |
US7875849B2 (en) | 2006-10-26 | 2011-01-25 | Hitachi High-Technologies Corporation | Electron beam apparatus and electron beam inspection method |
US7705302B2 (en) | 2007-01-30 | 2010-04-27 | Hitachi High-Technologies Corporation | Scanning electron microscope |
JP2008186689A (ja) * | 2007-01-30 | 2008-08-14 | Hitachi High-Technologies Corp | 走査形電子顕微鏡 |
US8044352B2 (en) | 2008-03-31 | 2011-10-25 | Hitachi High-Technologies Corporation | Electron microscopy |
US8455823B2 (en) | 2008-12-02 | 2013-06-04 | Hitachi High-Technologies Corporation | Charged particle beam device |
JP2012003909A (ja) * | 2010-06-16 | 2012-01-05 | Hitachi High-Technologies Corp | 荷電粒子線装置 |
US8841612B2 (en) | 2010-09-25 | 2014-09-23 | Hitachi High-Technologies Corporation | Charged particle beam microscope |
JP2012248304A (ja) * | 2011-05-25 | 2012-12-13 | Horon:Kk | 電子検出装置および電子検出方法 |
WO2013058077A1 (ja) * | 2011-10-20 | 2013-04-25 | 株式会社日立ハイテクノロジーズ | 走査電子顕微鏡 |
JP2013089514A (ja) * | 2011-10-20 | 2013-05-13 | Hitachi High-Technologies Corp | 走査電子顕微鏡 |
US8969801B2 (en) | 2011-10-20 | 2015-03-03 | Hitachi High-Technologies Corporation | Scanning electron microscope |
JP2012186177A (ja) * | 2012-06-18 | 2012-09-27 | Hitachi High-Technologies Corp | 電子線応用装置 |
JP2018128702A (ja) * | 2013-06-04 | 2018-08-16 | ケーエルエー−テンカー コーポレイション | Semオーバーレイ計測のシステムおよび方法 |
CN111108579A (zh) * | 2017-09-29 | 2020-05-05 | 株式会社日立高新技术 | 扫描电子显微镜 |
Also Published As
Publication number | Publication date |
---|---|
JP4300710B2 (ja) | 2009-07-22 |
US6501077B1 (en) | 2002-12-31 |
EP1117125A4 (en) | 2007-05-02 |
EP1117125A1 (en) | 2001-07-18 |
EP1117125B1 (en) | 2014-04-16 |
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