WO2015015957A1 - 荷電粒子線装置 - Google Patents
荷電粒子線装置 Download PDFInfo
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- WO2015015957A1 WO2015015957A1 PCT/JP2014/066763 JP2014066763W WO2015015957A1 WO 2015015957 A1 WO2015015957 A1 WO 2015015957A1 JP 2014066763 W JP2014066763 W JP 2014066763W WO 2015015957 A1 WO2015015957 A1 WO 2015015957A1
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- charged particle
- particle beam
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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- 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
- H01J37/02—Details
- H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement or ion-optical arrangement
- H01J37/10—Lenses
- H01J37/14—Lenses magnetic
- H01J37/141—Electromagnetic lenses
-
- 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 or ion-optical arrangement
- H01J37/10—Lenses
- H01J37/145—Combinations of electrostatic and magnetic lenses
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- 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 or ion-optical arrangement
- H01J37/147—Arrangements for directing or deflecting the discharge along a desired path
- H01J37/1471—Arrangements for directing or deflecting the discharge along a desired path for centering, aligning or positioning of ray or beam
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- 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
- H01J37/22—Optical, image processing or photographic arrangements associated with the tube
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- 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
- H01J37/22—Optical, image processing or photographic arrangements associated with the tube
- H01J37/226—Optical arrangements for illuminating the object; optical arrangements for collecting light from the object
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- 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
- H01J37/285—Emission microscopes, e.g. field-emission microscopes
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- 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
- H01J2237/10—Lenses
- H01J2237/12—Lenses electrostatic
-
- 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
- H01J2237/10—Lenses
- H01J2237/14—Lenses magnetic
Definitions
- the present invention relates to a charged particle beam apparatus including a detection particle detector that detects charged particles emitted or reflected from a sample when the sample is irradiated with a charged particle beam, for example.
- the scanning electron microscope (SEM) capable of nano level observation is used in various fields such as the semiconductor field, the material field, and the bio field.
- SEM detects signal electrons emitted from a sample with a detector arranged in a sample chamber or a charged particle beam column, and acquires an image. Therefore, the obtained image quality is greatly affected by the detection system.
- various methods have been proposed so far, in which an electrode for attracting signal electrons is mounted at the tip of the detector (Patent Document 1), a conversion plate is used (Patent Document 2), and an orthogonal electromagnetic field is measured.
- the one used (Patent Document 3) and the one having an annular charged particle light receiving surface (Patent Document 4) have been proposed.
- There has also been a proposal regarding a detector mounting position in which a hole for inserting a detector is provided on the side wall at the tip of a magnetic path forming a magnetic lens Patent Document 5).
- the inventor of the present application diligently studied mounting a charged particle detector in a column that irradiates a sample with a charged particle beam, and as a result, the following knowledge was obtained.
- an SEM will be described as an example of the charged particle beam apparatus.
- the detector In order to improve the image quality of SEM images, it is necessary to efficiently acquire many signal electrons. As an effective method for that purpose, it is conceivable to arrange the detector at a position close to the source of signal electrons, that is, a position as close as possible to the sample inside the objective lens.
- various components such as electrodes, coils, and deflectors must be arranged inside the objective lens, and it is difficult to secure a sufficient space near the sample.
- An object of the present invention relates to efficiently acquiring signal electrons emitted from a sample from a position as close as possible to the sample inside the objective lens.
- the present invention includes, for example, a charged particle light-receiving surface including a scintillator that emits light by charged particles, a photodetector that detects light emitted from the scintillator, a mirror that guides light emitted from the scintillator to a photodetector, and a charged particle beam. And an objective lens for focusing on the sample, and the distance Lsm between the charged particle light receiving surface and the mirror is longer than the distance Lpm between the photodetector and the mirror.
- the present invention also provides, for example, a charged particle light receiving surface including a scintillator that emits light by charged particles, a photodetector that detects light emitted from the scintillator, a mirror that guides the light emitted from the scintillator to the photodetector, and charged particles.
- the present invention relates to the fact that there is a gap between a charged particle light receiving surface and a photodetector in a projection view that includes an objective lens for focusing a line on a sample and projects a charged particle detector onto a surface parallel to the light receiving surface of the photodetector.
- the charged particle detector can be installed in a small space inside the objective lens. Moreover, the charged particle light-receiving surface can be installed at a position closer to the sample than the photodetector.
- FIG. 1 is a schematic diagram of a charged particle beam apparatus according to a first embodiment.
- Schematic of charged particle detector unit according to Example 1 (configuration using colorless and transparent acrylic resin or quartz glass as a light guide)
- Schematic of charged particle detector section according to Example 1 (configuration using fiber optic plate)
- Schematic of charged particle detector unit according to Example 1 (configuration using an optical lens)
- Schematic diagram of the GUI screen according to the first embodiment Schematic of the charged particle beam apparatus according to the second embodiment.
- a charged particle light receiving surface including a scintillator that emits light by charged particles, a photodetector that detects light emitted from the scintillator, a mirror that guides light emitted from the scintillator to the photodetector, and a charged particle beam as a sample.
- a charged particle beam device is disclosed.
- the embodiment also includes a charged particle light receiving surface having a scintillator that emits light by charged particles, a photodetector that detects light emitted from the scintillator, a mirror that guides the light emitted from the scintillator to the photodetector, and a charged particle beam.
- a charged particle beam device in which a mirror and a photodetector are stored inside an objective lens is disclosed.
- the embodiment includes a charged particle light receiving surface including a scintillator that emits light by charged particles, a photodetector that detects light emitted from the scintillator, and a mirror that guides the light emitted from the scintillator to the photodetector.
- a charged particle detector in which the distance Lsm between the light receiving surface and the mirror is longer than the distance Lpm between the photodetector and the mirror.
- the embodiment includes a charged particle light receiving surface including a scintillator that emits light by charged particles, a photodetector that detects light emitted from the scintillator, and a mirror that guides the light emitted from the scintillator to the photodetector.
- a charged particle detector having a gap between the charged particle light receiving surface and the photodetector in a projection view in which the detector is projected onto a plane parallel to the light receiving surface of the photodetector.
- the embodiment discloses that the charged particle beam apparatus includes a signal amplification substrate that amplifies the output of the photodetector, and the signal amplification substrate is stored inside the objective lens.
- the objective lens includes a coil that generates a magnetic field for focusing the charged particle beam, and the charged particle light receiving surface is disposed between the upper surface and the lower surface of the coil with respect to the optical axis of the objective lens. It is disclosed. Furthermore, the objective lens includes a coil and a pole piece for generating a focusing magnetic field, and two or more electrodes for generating a focusing electrostatic field, and one of the electrodes and the charged particle receiving surface of the charged particle detector is a spring. It is disclosed that they are in electrical contact with each other.
- the objective lens includes a coil that generates a magnetic field for focusing the charged particle beam, and the charged particle light receiving surface is disposed closer to the sample than the coil with respect to the optical axis of the objective lens. It is disclosed. Furthermore, the objective lens includes a coil and a pole piece for generating a focusing magnetic field, and two or more electrodes for generating a focusing electrostatic field, and one of the electrodes and the charged particle receiving surface of the charged particle detector is a spring. It is disclosed that they are in electrical contact with each other. Further, it is disclosed that a light receiving surface opening for inserting a charged particle light receiving surface is provided on the side wall at the tip of the objective lens, and the charged particle light receiving surface is inserted along the light receiving surface opening.
- an optical lens opening for inserting an optical lens is provided on the side wall at the tip of the objective lens, and an optical lens for guiding light emitted from the scintillator to the mirror is inserted along the optical lens opening.
- the light receiving surface opening and the optical lens opening are the same opening.
- the embodiment discloses that a through hole is formed in the center of the charged particle light receiving surface. Furthermore, a beam tube extending through the through hole of the charged particle light receiving surface and a mesh are provided, and the inner surface of the beam tube and the charged particle light receiving surface are electrically insulated, and there is a mesh near the tip of the beam tube. Discloses that the mesh and the beam tube are in electrical contact.
- the embodiment discloses that a fiber optic plate is provided between the charged particle light receiving surface and the mirror. Further, it is disclosed that a through hole is formed in the center of the fiber optic plate. Furthermore, it discloses that a conductive thin film is applied to the surface of the fiber optic plate.
- the embodiment discloses that an optical lens is provided between the charged particle light receiving surface and the mirror. Further, it is disclosed that a through hole is formed at the center of the optical lens. Furthermore, it discloses that a conductive thin film is applied to the surface of the optical lens. Furthermore, it is disclosed that the optical lens and the mirror are arranged so that the first image surface of the charged particle light receiving surface is behind the light receiving surface of the photodetector.
- the embodiment discloses that a concave mirror is used for the mirror.
- the embodiment includes a charged particle beam column that irradiates the sample with a charged particle beam and a charged particle detector that detects the charged particle, and the charged particle detected by the charged particle detector is emitted from the sample.
- a charged particle beam device having a function of displaying the energy at the time of discharge and the direction when it is emitted. Furthermore, it discloses that it has a function of expressing the energy when emitted as a distance from the origin and the direction when emitted as an inclination.
- the embodiment discloses a GUI screen that displays the emission energy when the charged particles detected by the charged particle detector are emitted from the sample and the emission angle when emitted from the sample. Further, it is disclosed that the emission energy is expressed as a distance from the origin and the emission angle as an inclination.
- FIG. 1 is a schematic view of a charged particle beam objective lens (hereinafter referred to as an objective lens) in the present embodiment.
- an objective lens 100 includes an out lens coil 101 and a single pole lens coil 102 for generating a magnetic field for focusing a charged particle beam on a sample, and an out lens coil controller 131 for controlling each coil. And a single pole lens coil controller 132, a magnetic pole piece 103 for forming a charged particle beam focusing lens using a magnetic field generated by each coil, and deflectors 104a and 104b for deflecting the charged particle beam
- a charged particle light receiving surface 105 including a deflector controller 134 for controlling the deflector, a scintillator that converts charged particles generated when the charged particle beam is irradiated onto the sample to photons, and a charged particle light receiving surface Generated from a scintillator and a charged particle light receiving surface power supply 106 for applying a high voltage to the charged particle light receiving surface power supply 106, a charged particle light receiving surface power supply controller 136 for controlling the charged particle light receiving surface power supply Photodetector 107 for detecting photons,
- the distance Lsm between the charged particle light receiving surface 105 and the mirror 108 and the distance Lpm between the photodetector 107 and the mirror 108 are in the relationship of the following expression.
- aluminum is vapor-deposited on the charged particle light receiving surface in order to provide conductivity.
- FIGS. 2 to 4 are schematic views of the charged particle detector unit according to the present embodiment. Specifically, it is a schematic diagram showing an example of a configuration for guiding photons generated from a scintillator to a photodetector.
- FIG. 2 shows a configuration in which a colorless and transparent acrylic resin or quartz glass is used as the light guide 215a.
- the role of the mirror 208a is provided by performing aluminum vapor deposition on the upper surface of the light guide cut so that the cut surface is 20 ° to 60 ° with respect to the charged particle light receiving surface 205a. be able to.
- the photodetector 207 can be connected from the charged particle light receiving surface 205a with one component.
- FIG. 3 shows a configuration using a fiber optic plate (FOP) 216.
- the FOP is an optical device in which optical fibers are bundled.
- a taper type device can transmit an image by enlarging or reducing the image. That is, photons generated from an area wider than the light receiving surface of the photodetector 207 can be guided to the photodetector.
- the charged particles emitted from the sample spread within the objective lens, and the way of spreading varies depending on the observation conditions. Therefore, widening the substantially effective charged particle light receiving surface 205b is very important in realizing stable detection efficiency.
- FIG. 4 shows a configuration in which photons generated from the scintillator are guided to the photodetector 207 via the mirror 208c using an optical lens.
- the substantially effective charged particle light receiving surface 205c can be made wider than the light receiving surface of the photodetector, so that a wide charged particle light receiving surface and a compact detector can be compatible.
- an effective charged particle light receiving surface can be changed by adopting a configuration in which the optical lens can be driven in the optical axis direction of the objective lens. That is, the distribution of detected signal electrons can be changed. In this configuration, the first optical lens 217 and the second optical lens 218 are used.
- the number of optical lenses is not limited for the purpose of guiding photons generated from the scintillator to the photodetector.
- the optical lens can be combined with the optical axis of the objective lens so that the image of the charged particle light receiving surface is not formed on the optical axis of the objective lens.
- the lenses are combined so that the image of the charged particle light receiving surface is formed farther than the light receiving surface of the photodetector.
- one beam tube 209 passes through from the mirror to the charged particle receiving surface so that the charged particle beam is not exposed to the insulator, but it is metallized in the light guide, FOP, and optical lens.
- a surface treatment for forming a conductive film such as a treatment or a nesa treatment, the charged particle beam may not be exposed to the insulator. Further, it may be divided into a plurality of beam tubes, or the beam tube and surface treatment may be used in combination.
- a flat mirror is used, but a concave mirror may be used.
- photons generated from an area wider than the light receiving surface of the photodetector can be guided to the photodetector.
- the objective lens is not limited to the magnetic field type, and may be an electrostatic objective lens or a magnetic field electrostatic compound objective lens.
- the charged particle light receiving surface By placing the charged particle light receiving surface closer to the sample than the photodetector light receiving surface, the charged particles emitted from the sample can be detected efficiently. Therefore, an improvement in image quality of the scanning charged particle beam image can be expected. Further, since the charged particle light receiving surface is disposed on the optical axis of the objective lens 100, there is an advantage that it is easy to analyze the energy and emission angle of the detected charged particles. This makes it easy to analyze image information and leads to improved usability. Further, by storing the photodetector 107 in the objective lens, the detector unit can be gathered in a compact manner. As a result, the detector can be mounted without making a large hole in the magnetic path.
- the space near the sample is further limited. For this reason, the advantage of compacting the detector section is greater for a composite charged particle beam apparatus having a plurality of charged particle beam columns. Further, by storing the photodetector controller 137 together in the objective lens, noise generated between the photodetector 107 and the photodetector controller 137 can be reduced.
- the voltage applied to the upper beam tube 109 and the voltage applied to the charged particle light receiving surface 105 can be controlled independently.
- This is very effective in a compound objective lens equipped with both an out lens and a single pole lens. This is because, in the out-lens mode, it is better to apply a high voltage to both the beam tube and the charged particle light receiving surface, and the charged particle beam focusing action and the charged particle detection performance are improved.
- a ground potential is preferable for the beam tube from the viewpoint of focusing action, whereas a high voltage is preferably applied to the charged particle light receiving surface from the viewpoint of detection performance.
- the energy discrimination of charged particles can be performed by independently controlling the potential of the beam tube and the potential of the charged particle light receiving surface. For example, in SEM, by applying +8 kV to the charged particle light receiving surface and ⁇ 30 V to the beam tube, secondary electrons of 30 V or less can be eliminated.
- the beam tube potential does not affect the sample irradiation energy of the charged particle beam, but does affect the trajectory of the charged particles emitted from the sample. Therefore, by controlling the beam tube potential, the angular distribution of charged particles reaching the charged particle light receiving surface 105 disposed inside the beam tube can be controlled. At that time, the beam tube and the charged particle light receiving surface may be at the same potential. Also, when the energy of the charged particle beam to be irradiated is high enough to cause the scintillator to emit light and the potentials of the beam tube and the charged particle light receiving surface are controlled independently, both the energy and the angle are adjusted simultaneously. Can be discriminated.
- the beam tube voltage is appropriately adjusted between -5 kV and +3 kV to obtain a desired
- the backscattered electrons at the emission angle can be selectively detected.
- the distance from the origin represents the energy of the secondary electrons, and the direction from the origin represents the angle. Accordingly, FIG. 5 shows that secondary electrons having an energy of 30 V or less and an emission angle of 30 ° to 60 ° are detected.
- the format is not limited. For example, a distribution diagram with the horizontal axis as energy and the vertical axis as an angle may be created, or the vertical axis and the horizontal axis as coordinates of the charged particle light receiving surface, and the points color-coded by energy or angle may be plotted. Absent.
- FIG. 6 is a schematic diagram of the objective lens in the present embodiment. Hereinafter, the difference from the first embodiment will be mainly described.
- an objective lens 300 includes an out lens coil 301 and a single pole lens coil 302 for generating a magnetic field for focusing a charged particle beam on a sample, and an out lens coil controller 331 for controlling each coil. And a single pole lens coil controller 332, a magnetic pole piece 303 for forming a charged particle beam focusing lens using a magnetic field generated by each coil, and deflectors 304a and 304b for deflecting the charged particle beam A deflector controller 334 for controlling the deflector, a charged particle light receiving surface 305 having a scintillator that converts charged particles generated when a charged particle beam is irradiated onto a sample to photons, and a charged particle light receiving surface A charged particle light receiving surface power source 306 for applying a high voltage to the power source, a charged particle light receiving surface power source controller 336 for controlling the charged particle light receiving surface power source, and a scintillator are supported.
- An integrated computer 330 that controls each control device in an integrated manner, a controller (keyboard, mouse, etc.) 351 for the operator to input various instructions such as irradiation conditions and sample stage position, and a GUI screen for controlling the device
- One or more devices that display 353, device status, acquired information (including images), etc. Is provided with a spray 352, a. Note that the state of the apparatus, acquired information, and the like may be included in the GUI screen 353.
- the charged particle light receiving surface 305 and the first optical lens 317 are inserted from a hole provided at the tip of the magnetic pole piece 303 as necessary, and can be retracted when unnecessary. Furthermore, a plurality of optical lenses with different focal lengths may be mounted as the first optical lens, and both or one of the first optical lens and the second optical lens can be driven in the optical axis direction of the objective lens. It is good also as a simple structure. Thereby, the substantial effective area of the charged particle light receiving surface can be changed. That is, the distribution of detected signal electrons can be changed.
- the scintillator and the first optical lens are supported by separate support rods, the scintillator and the first optical lens may be integrated and supported by a single support rod. Moreover, it is good also as a structure which does not fix to a support rod but to put inside an objective lens as needed, and is good also as a structure fixed inside an objective lens.
- a beam tube or a mesh may be mounted, or a concave mirror may be used instead of a flat mirror.
- the objective lens is not limited to the magnetic field type, and may be an electrostatic objective lens or a magnetic field electrostatic composite objective lens.
- the distance between the charged particle light receiving surface and the sample can be reduced as compared with the configuration according to the first embodiment, signal electrons can be detected more efficiently. If the support is supported by the support rod and can be inserted or retracted, a hole will be made at the tip of the magnetic path. An objective lens is used.
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Abstract
Description
すなわち、フォトディテクタ受光面に対して平行な面に荷電粒子受光面105を投影した場合、フォトディテクタと荷電粒子受光面の間に間隙が存在する。
101, 301:アウトレンズ用コイル
102, 302:シングルポールレンズ用コイル
103, 303:磁極片
104a, 104b, 304a, 304b:偏向器
105, 205a, 205b, 205c, 305:荷電粒子受光面
106, 306:荷電粒子受光面用電源
107, 207, 307:フォトディテクタ
108, 208a, 208b, 208c, 308:ミラー
109:上部ビーム管
110:下部ビーム管
111:ビーム管用電源
112:メッシュ
113:バネ
130, 330:統合コンピュータ
131, 331:アウトレンズ用コイル制御器
132, 332:シングルポールレンズ用コイル制御器
134, 334:偏向器制御器
136, 336:荷電粒子受光面用電源制御器
137, 337:フォトディテクタ制御器
141:ビーム管用電源制御器
151, 351:コントローラ(キーボード、マウスなど)
152, 352:ディスプレイ
153, 353:GUI画面
209:ビーム管
215a, 215b:ライトガイド
216:ファイバーオプティクプレート(FOP)
217, 317:第1の光学レンズ
218, 318:第2の光学レンズ
319:シンチレータ支持棒
320:光学レンズ支持棒
349:シンチレータ支持棒制御器
350:光学レンズ支持棒制御器
Claims (20)
- 荷電粒子によって発光するシンチレータを備えた荷電粒子受光面と、シンチレータから放出された光を検出するフォトディテクタと、シンチレータから放出された光を前記フォトディテクタに導くミラーと、荷電粒子線を試料に集束するための対物レンズとを備え、
前記荷電粒子受光面と前記ミラーとの距離Lsmが、前記フォトディテクタと前記ミラーとの距離Lpmよりも長く、
前記荷電粒子受光面、前記ミラー、および前記フォトディテクタが、前記対物レンズ内部に格納されている荷電粒子線装置。 - 荷電粒子によって発光するシンチレータを備えた荷電粒子受光面と、シンチレータから放出された光を検出するフォトディテクタと、シンチレータから放出された光を前記フォトディテクタに導くミラーと、荷電粒子線を試料に集束するための対物レンズとを備え、
前記荷電粒子検出器を前記フォトディテクタの受光面と平行な面に投影した投影図において、前記荷電粒子受光面と前記フォトディテクタとの間に間隙があり、
前記荷電粒子受光面、前記ミラー、および前記フォトディテクタが、前記対物レンズ内部に格納されている荷電粒子線装置。 - 請求項1または2のいずれかに記載の荷電粒子線装置において、
前記フォトディテクタの出力を増幅する信号増幅用基板を備え、当該信号増幅用基板が前記対物レンズ内部に格納されていることを特徴とする荷電粒子線装置。 - 請求項1または2のいずれかに記載の荷電粒子線装置において、
前記対物レンズが、荷電粒子線を集束させる磁場を発生させるコイルを備え、
当該対物レンズの光軸に対して、前記荷電粒子受光面が、前記コイルの上面と下面の間に設置されていることを特徴とする荷電粒子線装置。 - 請求項4に記載の荷電粒子線装置において、
前記対物レンズが、集束磁界を発生させるコイルおよび磁極片と、集束静電界を発生させる2つ以上の電極とを備え、
前記電極の1つと、前記荷電粒子検出器の荷電粒子受光面とが、バネを介して電気的に接触していることを特徴とする荷電粒子線装置。 - 請求項1または2のいずれかに記載の荷電粒子線装置において、
前記対物レンズが、荷電粒子線を集束させる磁場を発生させるコイルを備え、
当該対物レンズの光軸に対して、前記荷電粒子受光面が、前記コイルよりも試料に近い位置に設置されていることを特徴とする荷電粒子線装置。 - 請求項6に記載の荷電粒子線装置において、
前記対物レンズが、集束磁界を発生させるコイルおよび磁極片と、集束静電界を発生させる2つ以上の電極とを備え、
前記電極の1つと、前記荷電粒子検出器の荷電粒子受光面とが、バネを介して電気的に接触していることを特徴とする荷電粒子線装置。 - 請求項1または2のいずれかに記載の荷電粒子線装置において、
前記荷電粒子受光面の中心に貫通穴があいていることを特徴とする荷電粒子線装置。 - 請求項8に記載の荷電粒子線装置において、
前記荷電粒子受光面の貫通穴を通って伸びるビーム管と、メッシュとを備え、
前記ビーム管の内面と前記荷電粒子受光面との間が電気的に絶縁され、前記ビーム管の先端近傍に前記メッシュがあり、当該メッシュと前記ビーム管とが電気的に接触していることを特徴とする荷電粒子線装置。 - 請求項1または2のいずれかに記載の荷電粒子線装置において、
前記荷電粒子受光面と前記ミラーの間にファイバーオプティクプレートが備えられていることを特徴とする荷電粒子線装置。 - 請求項10に記載の荷電粒子線装置において、
前記ファイバーオプティクプレートの中心に貫通穴があいていることを特徴とする荷電粒子線装置。 - 請求項11に記載の荷電粒子線装置において、
前記ファイバーオプティクプレートの表面に導電性薄膜が施されていることを特徴とする荷電粒子線装置。 - 請求項1または2のいずれかに記載の荷電粒子線装置において、
前記荷電粒子受光面と前記ミラーの間に光学レンズが備えられていることを特徴とする荷電粒子線装置。 - 請求項13に記載の荷電粒子線装置において、
前記光学レンズの中心に貫通穴があいていることを特徴とする荷電粒子線装置。 - 請求項14に記載の荷電粒子線装置において、
前記光学レンズの表面に導電性薄膜が施されていることを特徴とする荷電粒子線装置。 - 請求項13に記載の荷電粒子線装置において、
前記荷電粒子受光面の最初の像面が、前記フォトディテクタの受光面よりも後方にくるように、前記光学レンズおよび前記ミラーが配置されていることを特徴とする荷電粒子線装置。 - 請求項1または2のいずれかに記載の荷電粒子線装置において、
前記ミラーに凹面鏡が用いられていることを特徴とする荷電粒子線装置。 - 請求項6に記載の荷電粒子線装置において、
前記対物レンズの先端の側壁に前記荷電粒子受光面挿入用の受光面用開口が設けてあり、前記受光面用開口に沿って、前記荷電粒子受光面が挿入されることを特徴とする荷電粒子線装置。 - 請求項18に記載の荷電粒子線装置において、
前記対物レンズの先端の側壁に光学レンズ挿入用の光学レンズ用開口が設けてあり、前記光学レンズ用開口に沿って、前記シンチレータから放出された光を前記ミラーに導く光学レンズが挿入されることを特徴とする荷電粒子線装置。 - 請求項19に記載の荷電粒子線装置において、
前記受光面用開口と前記光学レンズ用開口が同一の開口であることを特徴とする荷電粒子線装置。
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JP2015529460A JPWO2015015957A1 (ja) | 2013-07-31 | 2014-06-25 | 荷電粒子線装置 |
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JPH10134754A (ja) * | 1996-11-05 | 1998-05-22 | Jeol Ltd | 走査電子顕微鏡 |
JP2002042713A (ja) * | 2000-07-28 | 2002-02-08 | Jeol Ltd | 対物レンズ内検出器を備えた走査電子顕微鏡 |
JP2004259469A (ja) * | 2003-02-24 | 2004-09-16 | Shimadzu Corp | 走査型電子顕微鏡 |
JP2012230902A (ja) * | 2011-04-26 | 2012-11-22 | Fei Co | 粒子光学鏡筒用の鏡筒内検出器 |
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US5635720A (en) * | 1995-10-03 | 1997-06-03 | Gatan, Inc. | Resolution-enhancement device for an optically-coupled image sensor for an electron microscope |
JP5818542B2 (ja) * | 2010-07-29 | 2015-11-18 | 浜松ホトニクス株式会社 | イオン検出装置 |
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JPH10134754A (ja) * | 1996-11-05 | 1998-05-22 | Jeol Ltd | 走査電子顕微鏡 |
JP2002042713A (ja) * | 2000-07-28 | 2002-02-08 | Jeol Ltd | 対物レンズ内検出器を備えた走査電子顕微鏡 |
JP2004259469A (ja) * | 2003-02-24 | 2004-09-16 | Shimadzu Corp | 走査型電子顕微鏡 |
JP2012230902A (ja) * | 2011-04-26 | 2012-11-22 | Fei Co | 粒子光学鏡筒用の鏡筒内検出器 |
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