WO1996002935A1 - Filtre a energie electronique - Google Patents
Filtre a energie electronique Download PDFInfo
- Publication number
- WO1996002935A1 WO1996002935A1 PCT/JP1995/001401 JP9501401W WO9602935A1 WO 1996002935 A1 WO1996002935 A1 WO 1996002935A1 JP 9501401 W JP9501401 W JP 9501401W WO 9602935 A1 WO9602935 A1 WO 9602935A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnetic field
- radius
- deflection
- angle
- ami
- Prior art date
Links
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
- H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement, ion-optical arrangement
- H01J37/05—Electron or ion-optical arrangements for separating electrons or ions according to their energy or mass
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/44—Energy spectrometers, e.g. alpha-, beta-spectrometers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/44—Energy spectrometers, e.g. alpha-, beta-spectrometers
- H01J49/46—Static spectrometers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/44—Energy spectrometers, e.g. alpha-, beta-spectrometers
- H01J49/46—Static spectrometers
- H01J49/48—Static spectrometers using electrostatic analysers, e.g. cylindrical sector, Wien filter
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/05—Arrangements for energy or mass analysis
- H01J2237/055—Arrangements for energy or mass analysis magnetic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/05—Arrangements for energy or mass analysis
- H01J2237/057—Energy or mass filtering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/26—Electron or ion microscopes
- H01J2237/28—Scanning microscopes
- H01J2237/2802—Transmission microscopes
Definitions
- the present invention relates to an electron energy filter for separating and imaging only electrons having a specific energy in an electron beam.
- Omega-type energy filters (USP 4,740,704) and alpha-type energy filters (USP 4,760,266) are available as electron energy filters used for such purposes. It has been known.
- the omega type energy filter is composed of three electromagnets as shown in FIG. 2, and by reversing the deflection direction of the first electromagnet 1 and the second and third electromagnets 2 and 3, ⁇
- This is a filter that draws an electron trajectory in the shape, emits electrons in the same direction as the incident direction of the electrons, and selects only electrons with a specific energy loss.
- 5 is a crossover point
- 6 is an entrance image plane
- 7 is an exit image plane
- 8 is an energy dispersion plane.
- the alpha-type energy filter, as shown in Fig. 3, consists of three electromagnets 11, 12, 13 with the same deflection direction.
- the incident electron 4 follows the shape of the electron trajectory, and finally the emission direction becomes the same as the incident direction, and only the electrons that have received a specific energy loss are selected.
- Another example of an alpha-type energy filter is shown in Fig. 4 [Perez, JP, Sirven, J., Sequela, A., and Lacaze, JC, Journal de Physique, (Paris), 45, Col l. C2, 171 -174 (1984)]. This narrows the two electromagnets 14 and 15 with deflection angles of 70 ° and 220 ° at different magnetic field strengths. It is separated by an intermediate space 16 and the energy analysis is performed by rotating the incident electron beam 4 once.
- An electron energy filter is required to form an energy dispersion surface and an image surface with less aberration. That is, after the electrons 4 that have passed through the sample pass through the electron energy filter from the crossover point 5 where they are connected to one point by a lens, the electrons of different energy are dispersed, but the electrons of the same energy are directionally converged. In plane 8, aberrations must be removed so that the resolution through the slit does not decrease. Further, at the exit image plane point 7 where the image formed on the entrance image plane 6 before the electron energy filter is re-imaged at a symmetrical position after passing through the filter, aberrations are minimized so as to eliminate image distortion. Need to be removed.
- the convergence condition of the electron optical system of the electron energy filter using the fan-shaped electromagnet can be calculated using the ion optical system calculation program used for the design of the mass spectrometer.
- the convergence characteristics up to the third order considering the influence of the edge magnetic field can be accurately calculated by the calculation program TRI 0 completed by Matsuo and Matsuda (T. Matsuo, H. Matsuda, Y. Fujita and H. Wol nik; Mass Spectroscopy, Vol. 24, No. 1, arch 1976).
- the convergence in the y direction is due to the effect of charged particles passing obliquely into the magnetic fields at the entrance and exit of the sector magnetic field. That is, when the angles formed by the edges of the electromagnets 31 and 32 with respect to the plane perpendicular to the electron beam 30 are EP 11 and EP 12 in the relationship shown in FIG. The signs of the angles EP 11 and EP 12 are positive), but the electron beam 30 converges in the y direction as shown in FIG. 5B.
- the angles formed by the edges of the electromagnets 31.32 with respect to the plane perpendicular to the electron beam 30 correspond to EP21 and EP21, as shown in Figure 5C.
- the electron beam 30 diverges in the y direction as shown in Fig. 5D.
- the secondary aberration due to TR I 0 is expressed by the following equation.
- X2 ⁇ , + ⁇ , + D 5, + XXx, 2 + XAx,, + ⁇ , 2
- x is the beam width in the energy dispersion direction due to the sector magnetic field
- ⁇ is the divergence angle in the X direction
- y represents the beam width in the direction perpendicular to X
- / 3 represents the divergence angle in the y direction
- Subscript 1 represents the initial condition of the beam
- Subscript 2 represents the beam width of the converged image X
- a , D, ⁇ , and B represent the first-order aberration coefficients
- XX, XA, AA, etc. represent the second-order aberration coefficients.
- the alpha-type energy filter of Perez et al. Shown in Fig. 4 has a secondary aberration as strong as 5 ° at the image point, a first-order magnification y in the y direction of 28, and an aberration coefficient in the y direction. B does not converge to 3 and becomes an extremely distorted image.
- An object of the present invention is to provide an electron energy filter having a better convergence characteristic while having a compact design using a small number of magnetic poles.
- first and second The deflection angles WMl and WM2 of the magnetic field need to be in the following relationship.
- FIG. 1A is a schematic diagram of an energy filter according to one embodiment of the present invention.
- FIG. 1B is a sectional view of the same.
- Figure 2 is a schematic diagram of a conventional omega-type energy filter.
- Figure 3 is a schematic diagram of a conventional alpha-type energy filter.
- Figure 4 is a schematic diagram of another alpha energy filter.
- 5A-5D are diagrams illustrating the convergence of the electron beam in the y direction due to the oblique incidence / emission effect.
- FIG. 6 is a diagram showing the relationship between the incident angle EP11 of the first magnetic field and the secondary aberration.
- FIG. 7 is a diagram illustrating a change in a secondary aberration according to a ratio of a free space distance to an orbital radius of a first magnetic field.
- FIG. 8 is a diagram showing the relationship between the incident angle EP21 of the second magnetic field and the secondary aberration.
- FIG. 9 is a diagram illustrating a change in a secondary aberration depending on a ratio of an orbital radius of a first magnetic field and a second magnetic field.
- FIG. 10 is a diagram illustrating a change in secondary aberration due to a ratio of the orbital radius of the first magnetic field to the convex surface radius of the incident end surface.
- FIG. 11 is a view for explaining a change in secondary aberration due to a ratio of a radius of an orbit of a first magnetic field to a radius of a concave surface of an emission end face.
- FIG. 12 is a configuration diagram of an electron microscope provided with the energy filter according to the embodiment of the present invention.
- FIG. 13 is a photograph of an energy filter image taken by an electron microscope equipped with an energy filter according to the embodiment of the present invention.
- FIG. 14 is a diagram of an energy dispersion spectrum by the energy filter according to the embodiment of the present invention.
- FIGS. 15A to 15C are electron microscope photographs comparing the energy filter images obtained by the energy filters according to the examples of the present invention.
- FIG. 16 is a schematic view of an energy filter according to another embodiment of the present invention.
- FIG. 1 is a schematic view of a magnetic pole of an electron energy filter according to an embodiment of the present invention.
- FIG. 1A is a plan view, and FIG.
- the electron beam 4 generates a first magnetic field generated between a pair of magnetic poles 21 and 2 by current flowing through the coils 25a and 25b, and a pair of magnetic poles generated by current flowing through the coils 26a and 26b. It is deflected by the second magnetic field generated between 22 and 22 '.
- the electron beam 4 is deflected to approximately 90 ° by the first magnetic field generated by the first magnetic pole pair 2 1, 2 1 ′, and then proceeds straight on the first path in free space to form the second magnetic pole pair 2 2, 2.
- the second magnetic field approximately 180 ° deflected in the same direction, again through the second path in free space, which is almost parallel to the first 3 ⁇ 4 ⁇ 1 ⁇ 2
- it re-enters the first magnetic field and is deflected 90 ° with the same radius as the first, so it rotates a total of 360 ° and emits in the same direction as the first.
- the orbital radius AM2 of the electron beam due to the second magnetic field is made approximately half of the orbital radius AMI due to the first magnetic field, and the area of the two magnetic poles 21 and 22 is reduced. In the filter constructed in this way, the electron beam follows an almost 7 (gamma) -shaped orbit.
- the convergence effect in the y direction is obtained by the effect of oblique emission and re-incidence on the magnetic pole 2 K 2 ⁇ ⁇ that generates the first magnetic field.
- the deflection angle WM1 and the center orbit radius AMI in the first magnetic field, the deflection angle WM2 and the center orbit radius A2 in the second magnetic field, and the distance DL2 from the exit point of the first magnetic field to the entrance point of the second magnetic field are given by the above equations. Select a value within the following range to satisfy (3) and equation (4).
- a 1 ⁇ DL2 ⁇ 0.8 AMI preferably 0.5 AM1 DL2 ⁇ 0.7 AMI (9)
- W 1 is preferably substantially 90 ° and WM2 is substantially 180 ° °
- AMI / A 2 is substantially equal to 2
- DL2 is substantially equal to AM2.
- the initial incident angle EP11 and the exit angle EP12 of the electron beam in the first magnetic field and the entrance and exit angle EP21 of the electron beam in the second magnetic field are in the following numerical ranges in order to minimize the secondary aberration. Select the box.
- EP11 ⁇ 0 ° (10) 30 °; EP12 ⁇ 40 ° (11) 1-3. EP21 ⁇ 1 ° (12)
- EP11 is substantially 42 ° and EP12 is substantially 118.
- EP21 is set to substantially 30 °.
- the pole tips at the first incident point and the exit point of the electron beam in the first magnetic field are processed into convex and concave surfaces to minimize the secondary aberration, and the radii of curvature RM1 and RM2 are within the following numerical ranges. Select. However, the ten sign indicates that the curvature is convex, and the one sign indicates that the curvature is concave.
- Incoming convex surface 0.5 ⁇ AM1 / RM1 ⁇ 0.9 (1 3)
- Outgoing concave surface — 0.5 ⁇ AM1 / RM2 ⁇ 0.05 (1 4)
- AM1 / RM1 is substantially 1.0 and AM1 / RM2 is effectively 0.7.
- the parameters of the representative electron optical system of this embodiment are as follows.
- Table 2 shows the second-order aberration coefficients of the electron energy filter with the above parameters. [Table 2]
- the secondary aberration of the image point 7 is reduced to 1Z10 or less compared to the conventional omega type and alpha type.
- the second-order aberration at the dispersion point 8 is also greatly reduced.
- the optimum conditions of the electron optical system of the energy filter of the present embodiment were determined by changing each parameter.
- the secondary aberration in the figure is expressed using the secondary aberration coefficients of Equations (1) and (2). Assuming the beam divergence when this filter is used for practical use, it is expressed in t / m. ing.
- the bar at the top of the aberration display indicates the value at the dispersion point, and the bar without the bar indicates the value at the image point.
- the optimal shape was determined based on the results of these shimmerines.
- the degree to which the secondary aberration is tolerated depends on the purpose of use of the device, etc., and cannot be unconditionally determined.
- the second-order aberration fluctuates gently with respect to the above-mentioned parameter, and if it is within the range of ⁇ 2 m, there is often no practical problem.
- the secondary error when the incident angle EP11 of the first magnetic field is set in the range of 118 ° to 5 °, the secondary error can be reduced to within 2 m of soil, and the secondary error can be reduced to the range of 112 ° to 0 °. Then, it can be seen that it can be further reduced to within ⁇ 1 / m. From Fig. 7, the ratio (DL2 / AM1) between the intermediate free space distance and the orbital radius of the first magnetic field is set in the range of 0.4 to 0.8. Then, it can be seen that the secondary aberration can be suppressed within ⁇ 2 m. From FIG.
- the secondary aberration can be suppressed to within ⁇ 2 by setting the entrance / exit angle EP21 to the second magnetic field in the range of ⁇ 3 ° to 1 °.
- the ratio of the orbital radius of the first magnetic field to the orbital radius of the second magnetic field (AM1 / AM2) is set in the range of approximately 2-3, the secondary aberration can be suppressed within 2 m of soil.
- the ratio (AM1 / RM1) of the orbital radius of the first magnetic field to the convex radius of the incident end face is set in the range of 0.5 to 0.9, the secondary aberration can be suppressed within ⁇ 2 / m. I understand. According to Fig.
- the secondary aberration is ⁇ 2 / It can be seen that it can be suppressed within m.
- Figure 12 shows the configuration.
- the magnetic poles 2 1 and 2 2 of the electron energy filter are of a so-called one-column type installed between the intermediate lens system 53 and the projection lens system 55. After being emitted from the electron gun 59 and converged by the converging lens system 50, the electron beam 4 transmitted through the sample 51 is converged to the crossover point 5 by the intermediate lens system 53, and then is passed through the energy filter. It rotates and is reconverged at the energy dispersion point 8, but electrons of different energies are dispersed by the magnetic pole magnetic fields 21 and 22 and become a line spectrum.
- a variable slit 54 is installed to select a specific energy range.
- the incident image plane 6 formed by the intermediate lens system 53 is re-imaged on the exit image plane 7 by the energy filter.
- This image is not blurred by the so-called achromatic effect because the dispersion is canceled by the energy filter even if the electrons have energy width.
- the electron beam selected to have a specific energy by the variable slit 54 is formed by enlarging the exit image 7 on the fluorescent plate 56 by the projection lens 55. 5 7 can be obtained with a detector.
- the electron energy filter has two independent magnetic poles 21 and 22. Each of the magnetic poles is wound with a coil, and generates a magnetic field in a specific orbit corresponding to the electron acceleration voltage.
- FIG. 13 shows an example of a photograph of an energy filter image obtained by an electron microscope with an energy filter according to the embodiment. As a sample, a carbon grating film of 0.5 m square was used. Energy is choosing zero-loss electrons. As is evident from the figure, the shape of the square is reproduced despite the orbit making one revolution with the electron energy filter.
- the electron energy filter can select only electrons of a specific energy.
- Figure 1 5 A- 1 5 C, the c Figure 1 5 A electron photomicrographs unstained specimen having a thickness of about 7 0 only were doubly fixed with glutaraldehyde and tetroxide Osumi ⁇ beam mouse myocardium A normal transmission electron microscope image
- Fig. 15B is an image of only zero-loss electrons selected using an electron energy filter
- Fig. 15C is an aperture image of only electrons near -250 eV.
- the use of the energy filter of the embodiment not only improves the contrast but also increases the mapping of specific elements by selecting core-loss electrons, compared to the conventional electron microscope. A clear image is obtained, and the function as an analytical electron microscope is improved.
- the deflection angle WM1 and the center orbit radius AMI in the first magnetic field, the deflection angle WM2 and the center orbit radius AM2 in the second magnetic field, and the distance DL2 from the exit point of the first magnetic field to the entrance point of the second magnetic field are represented by the above formula ( Select a value within the following numerical range so as to satisfy 3) and equation (4).
- the magnetic pole end surfaces at the first entrance and exit points of the electron beam in the first magnetic field are processed to be convex or concave to minimize the secondary aberration, and the respective radii of curvature RM1 and RM2 are Select within the numerical range.
- the sign of + indicates that the curvature is convex
- the sign of one indicates that the curvature is concave.
- Incident surface 1 1 AM1 / RM1 ⁇ 1 (2 4)
- Outgoing surface 1 1 A 1 / RM2 ⁇ 1 (2 5)
- the electron beam emitted from one point of the crossover is L at the energy dispersive surface and again at one point Designed to focus on This means that if you focus on a line instead of on one point,
- the energy spectrum and the energy selection slit must be strictly parallel.
- a flat slit over a wide area is required to suppress the influence of dust from the slit.
- the parameters of the representative electron optical system of this embodiment are as follows.
- Table 3 shows the results of calculating the second-order aberration coefficient in the electron energy filter of the present embodiment using TRI0.
- Each of the secondary aberration coefficients shows a sufficiently small value that does not cause distortion or blur in the energy spectrum and the image, and is within an allowable range.
- the number of deflection magnetic fields for realizing the above-mentioned optical system is two, that is, the number of magnetic poles is as small as four, and it is a compact electron energy filter which is excellent in workability and workability and is compact.
- the deflection angle WM1 and the center orbit radius AMI in the first magnetic field, the deflection angle WM2 and the center orbit radius AM2 in the second magnetic field, and the distance DL2 from the exit point of the first magnetic field to the entrance point of the second magnetic field are represented by the above formula ( Select a value in the following numerical range so as to satisfy 3) and equation (4).
- the magnetic pole ends of the first incident point and the exit point of the electron beam in the first magnetic field are processed to be convex or concave in order to minimize the secondary aberration, and the radii of curvature RM11 and RM12 are within the range of the following numerical values. Select. However, the sign of + indicates that the curvature is convex, and the sign of-indicates that the curvature is concave.
- Incident surface 0.5 ⁇ AM1 / RM11 ⁇ 1.5 (3 5)
- Exit surface — 1.5 AM1 / RM12 -0.5 (3 6)
- the radius of curvature of the pole tip surface at the entrance and exit points of the electron beam in the second magnetic field RM21 is selected in the following numerical range depending on the orbit radius AM2.
- the energy spectrum and the energy selection slit must be strictly parallel.
- a flat slit over a wide area is required to suppress the influence of dust from the slit.
- the parameters of the representative electron optical system of this embodiment are as follows.
- the primary aberration coefficients at the image point DLI4 and the energy dispersion point DLD4 in this case are as follows. Where DLI4 is the distance from the final pole tip to the image point, and DLD4 is the distance from the final pole tip to the energy dispersion point.
- the second-order aberration coefficient in the electron energy filter of this embodiment is calculated using TRIO.
- Table 4 shows the calculation results.
- Each of the secondary aberration coefficients shows a sufficiently small value that does not cause distortion or blur in the energy spectrum and the image, and is within an allowable range.
- the number of deflection magnetic fields for realizing the above-mentioned optical system is two, that is, the number of magnetic poles is as small as four, and it is a compact electron energy filter which is excellent in workability and workability and is compact.
- the deflection angle WM1 and the center orbit radius AMI in the first magnetic field, the deflection angle WM2 and the center orbit radius AM2 in the second magnetic field, and the distance DL2 from the emission point of the first magnetic field to the incidence point of the second magnetic field are expressed by the above-mentioned formulas.
- equation (4) select a value within the following range.
- the magnetic pole end surfaces at the first incident point and the exit point of the electron beam in the first magnetic field are processed into concave or convex surfaces to minimize the secondary aberration.
- the radii of curvature RM11 and RM12 are selected within the following numerical ranges. However, the sign of + means that the curvature is convex Where one sign means that the curvature is concave.
- Input surface — 0.2 AM1 / RM11 ⁇ 0 (4 7) Output surface: 0 ⁇ A 1 / RM12 ⁇ 1 (4 8) Input / output surface: 0.5 ⁇ AM1 / RM21 ⁇ 1.5 (4 9) Emitted from the crossover point
- the electron beam is designed to re-focus on the energy dispersive plane—a point. This means that if you focus on a line instead of on one point,
- the energy spectrum and the energy selection slit must be strictly parallel.
- a flat slit over a wide area is required to suppress the influence of dust from the slit.
- the parameters of the representative electron optical system of this embodiment are as follows.
- the primary aberration coefficients at the image point DLI4 and the energy dispersion point DLD4 in this case are as follows. Where DL14 is the distance from the final pole tip to the image point, and DLD4 is the distance from the final pole tip to the energy dispersion point.
- Table 5 shows the calculation results of the second-order aberration coefficient in the electron energy filter of this embodiment using TRI0.
- Each of the secondary aberration coefficients has a sufficiently small value and does not cause distortion or blurring in the energy spectrum and the image. It is within the range.
- the number of deflection magnetic fields for realizing the above-mentioned optical system is two, that is, the number of magnetic poles is as small as four, and it is a compact electron energy filter which is excellent in workability and workability and is compact.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95925121A EP0772225B1 (en) | 1994-07-15 | 1995-07-14 | Electronic energy filter |
US08/765,914 US6066852A (en) | 1994-07-15 | 1995-07-14 | Electron energy filter |
DE69529987T DE69529987T2 (de) | 1994-07-15 | 1995-07-14 | Elektronischer energiefilter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18514094 | 1994-07-15 | ||
JP6/185140 | 1994-07-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996002935A1 true WO1996002935A1 (fr) | 1996-02-01 |
Family
ID=16165580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1995/001401 WO1996002935A1 (fr) | 1994-07-15 | 1995-07-14 | Filtre a energie electronique |
Country Status (4)
Country | Link |
---|---|
US (1) | US6066852A (ja) |
EP (1) | EP0772225B1 (ja) |
DE (1) | DE69529987T2 (ja) |
WO (1) | WO1996002935A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6310341B1 (en) * | 1998-02-23 | 2001-10-30 | Hitachi, Ltd. | Projecting type charged particle microscope and projecting type substrate inspection system |
JP2003297271A (ja) * | 2002-04-03 | 2003-10-17 | Hitachi High-Technologies Corp | モノクロメータ付走査形電子顕微鏡 |
US6855927B2 (en) | 2002-05-13 | 2005-02-15 | Hitachi High-Technologies Corporation | Method and apparatus for observing element distribution |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19746785A1 (de) * | 1997-10-23 | 1999-04-29 | Leo Elektronenmikroskopie Gmbh | Teilchenstrahlgerät mit Energiefilter |
DE19855629A1 (de) * | 1998-12-02 | 2000-06-08 | Leo Elektronenmikroskopie Gmbh | Teilchenoptische Anordnung und Verfahren zur teilchenoptischen Erzeugung von Mikrostrukturen |
DE10005347A1 (de) * | 2000-02-08 | 2001-08-09 | Leo Elektronenmikroskopie Gmbh | Elektronenenergiefilter mit magnetischen Umlenkbereichen |
JP2002025485A (ja) * | 2000-07-06 | 2002-01-25 | Jeol Ltd | エネルギーフィルタ |
US6717141B1 (en) * | 2001-11-27 | 2004-04-06 | Schlumberger Technologies, Inc. | Reduction of aberrations produced by Wien filter in a scanning electron microscope and the like |
US20060063802A1 (en) | 2004-03-29 | 2006-03-23 | Matthieu Guitton | Methods for the treatment of tinnitus induced by cochlear excitotoxicity |
PL368785A1 (pl) * | 2004-06-28 | 2006-01-09 | Krzysztof Grzelakowski | Obrazujący filtr energii dla elektronów i innych elektrycznie naładowanych cząstek oraz sposób filtrowania energii elektronów i innych elektrycznie naładowanych cząstek w urządzeniach elektrooptycznych za pomocą obrazującego filtru energii |
EA017264B1 (ru) * | 2005-09-28 | 2012-11-30 | Аурис Медикаль Аг | Применение композиции арилциклоалкиламида для получения лекарственного препарата для лечения нарушения внутреннего уха |
CN109613597B (zh) * | 2018-11-30 | 2021-04-06 | 上海联影医疗科技股份有限公司 | 一种确定电子束能谱的方法及系统 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61277141A (ja) * | 1985-05-31 | 1986-12-08 | Jeol Ltd | 磁界型エネルギ−フイルタ− |
JPS6266553A (ja) * | 1985-09-13 | 1987-03-26 | カ−ル・ツアイス−スチフツング | オメガ形電子エネルギフイルタ |
JPS6269456A (ja) * | 1985-09-13 | 1987-03-30 | カ−ル・ツアイス−スチフツング | アルフア形電子エネルギフイルタ |
JPH06162977A (ja) * | 1992-11-26 | 1994-06-10 | Jeol Ltd | オメガフィルタ |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2453492A1 (fr) * | 1979-04-03 | 1980-10-31 | Cgr Mev | Dispositif de deviation magnetique achromatique d'un faisceau de particules chargees et appareil d'irradiation utilisant un tel dispositif |
US4312218A (en) * | 1979-09-04 | 1982-01-26 | Li-Cor, Inc. | Porometer and method for stomatal measurements |
US4425506A (en) * | 1981-11-19 | 1984-01-10 | Varian Associates, Inc. | Stepped gap achromatic bending magnet |
DE3423149A1 (de) * | 1984-06-22 | 1986-01-02 | Fa. Carl Zeiss, 7920 Heidenheim | Verfahren und anordnung zur elektronenenergiegefilterten abbildung eines objektes oder eines objektbeugungsdiagrammes mit einem transmissions-elektronenmikroskop |
US5097126A (en) * | 1990-09-25 | 1992-03-17 | Gatan, Inc. | High resolution electron energy loss spectrometer |
DE4041495A1 (de) * | 1990-12-22 | 1992-06-25 | Zeiss Carl Fa | Elektronenenergiefilter, vorzugsweise vom alpha- oder omega-typ |
JP3139920B2 (ja) * | 1994-07-25 | 2001-03-05 | 株式会社日立製作所 | エネルギフィルタおよびこれを備えた透過電子顕微鏡 |
-
1995
- 1995-07-14 US US08/765,914 patent/US6066852A/en not_active Expired - Fee Related
- 1995-07-14 EP EP95925121A patent/EP0772225B1/en not_active Expired - Lifetime
- 1995-07-14 DE DE69529987T patent/DE69529987T2/de not_active Expired - Fee Related
- 1995-07-14 WO PCT/JP1995/001401 patent/WO1996002935A1/ja active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61277141A (ja) * | 1985-05-31 | 1986-12-08 | Jeol Ltd | 磁界型エネルギ−フイルタ− |
JPS6266553A (ja) * | 1985-09-13 | 1987-03-26 | カ−ル・ツアイス−スチフツング | オメガ形電子エネルギフイルタ |
JPS6269456A (ja) * | 1985-09-13 | 1987-03-30 | カ−ル・ツアイス−スチフツング | アルフア形電子エネルギフイルタ |
JPH06162977A (ja) * | 1992-11-26 | 1994-06-10 | Jeol Ltd | オメガフィルタ |
Non-Patent Citations (1)
Title |
---|
See also references of EP0772225A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6310341B1 (en) * | 1998-02-23 | 2001-10-30 | Hitachi, Ltd. | Projecting type charged particle microscope and projecting type substrate inspection system |
JP2003297271A (ja) * | 2002-04-03 | 2003-10-17 | Hitachi High-Technologies Corp | モノクロメータ付走査形電子顕微鏡 |
US6855927B2 (en) | 2002-05-13 | 2005-02-15 | Hitachi High-Technologies Corporation | Method and apparatus for observing element distribution |
Also Published As
Publication number | Publication date |
---|---|
DE69529987D1 (de) | 2003-04-24 |
DE69529987T2 (de) | 2004-01-15 |
US6066852A (en) | 2000-05-23 |
EP0772225B1 (en) | 2003-03-19 |
EP0772225A1 (en) | 1997-05-07 |
EP0772225A4 (en) | 1997-10-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3269575B2 (ja) | 鏡補正器を有する、荷電素粒子ビーム用結像系 | |
US6191423B1 (en) | Correction device for correcting the spherical aberration in particle-optical apparatus | |
US6770887B2 (en) | Aberration-corrected charged-particle optical apparatus | |
JP3732533B2 (ja) | 結像用の電子エネルギーフィルタ | |
US8178850B2 (en) | Chromatic aberration corrector for charged-particle beam system and correction method therefor | |
EP2020673B1 (en) | Aberration correction system | |
JP2004519084A (ja) | ミラー補正器を有する粒子ビームシステム | |
WO1996002935A1 (fr) | Filtre a energie electronique | |
JP3471039B2 (ja) | 電子ビーム装置 | |
JP6843794B2 (ja) | 収差補正装置および荷電粒子線装置 | |
JP2004087460A (ja) | 収差補正装置を備えた荷電粒子ビーム装置 | |
US20080093563A1 (en) | Aberration Corrector and Method of Aberration Correction | |
US6559445B2 (en) | Electron energy filter with magnetic deflecting regions | |
US6307205B1 (en) | Omega energy filter | |
JP2003502802A (ja) | 粒子レンズの色収差を除去する静電修正器 | |
US6441378B1 (en) | Magnetic energy filter | |
JP2003132828A (ja) | モノクロメータ付走査形電子顕微鏡 | |
EP3731255B1 (en) | Energy filter and charged particle beam apparatus | |
US5955732A (en) | Omega-type energy filter | |
JP2004517456A (ja) | 静電矯正器 | |
JPS5835852A (ja) | 荷電ビ−ム用レンズ | |
JP3692011B2 (ja) | 磁界型エネルギーフィルタ | |
Alamir | On the rotation-free and distortion-free systems | |
JP2005302438A (ja) | 電子顕微鏡 | |
JPH10302711A (ja) | オメガ型エネルギーフィルタ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): JP US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1995925121 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 08765914 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 1995925121 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1995925121 Country of ref document: EP |