WO2011158458A1 - 荷電粒子線装置および防音カバー - Google Patents
荷電粒子線装置および防音カバー Download PDFInfo
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- WO2011158458A1 WO2011158458A1 PCT/JP2011/003137 JP2011003137W WO2011158458A1 WO 2011158458 A1 WO2011158458 A1 WO 2011158458A1 JP 2011003137 W JP2011003137 W JP 2011003137W WO 2011158458 A1 WO2011158458 A1 WO 2011158458A1
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- particle beam
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
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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
- H01J37/28—Electron or ion microscopes; Electron or ion diffraction tubes with scanning beams
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K5/00—Irradiation devices
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- 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
- H01J2237/02—Details
- H01J2237/0216—Means for avoiding or correcting vibration effects
Definitions
- the present invention relates to a soundproof cover for reducing noise and vibration from the external environment.
- the present invention relates to a cover for a device that is used in a clean room or the like and requires dustproof performance.
- a soundproof cover is used for the purpose of blocking noise transmission.
- the soundproof cover has a plate-like shape made of a material having no air permeability, and is installed at a position between a target noise reduction portion and a sound source so as to be perpendicular to the noise arrival direction.
- noise Since noise has the property of wrapping around, when a large noise reduction effect is required, it is common to install a soundproof cover so as to surround the noise reduction part, considering the workability and cost reduction Usually, a hexahedral surface having upper, lower, left, and upper surfaces is formed.
- the noise reduction performance of the soundproof cover is basically proportional to its weight and increases by 6 dB each time the weight is doubled.
- the noise reduction performance can be effectively improved with a small weight.
- the installation space and cost increase due to the multilayer structure.
- Patent Document 1 discloses a porous soundproof structure that absorbs noise using the Helmholtz resonance principle.
- Patent Document 2 discloses a technique for covering a sound absorbing material with a dustproof fiber and attaching it to an exterior cover.
- Patent Document 2 uses a material that generates dust, and the dustproof performance is still insufficient.
- This invention aims at reducing the vibration trouble of the apparatus used in a clean room by providing a soundproof cover with high dustproof property.
- the above problem can be solved by using the soundproof cover as an exterior cover of the device.
- Example 3 of this invention It is a figure explaining Example 3 of this invention. It is a figure explaining Example 3 of this invention. It is a figure explaining Example 3 of this invention. It is a figure explaining Example 4 of this invention. It is a figure explaining Example 5 of this invention. It is a schematic diagram explaining an example of a charged particle beam apparatus. It is the example which applied the soundproof cover of this invention to the charged particle beam apparatus.
- FIG. 1 shows an overall view of the soundproof cover 10
- FIG. 2 shows a cross section of FIG.
- the soundproof cover 10 is basically composed of four side surfaces 11, 12, 13, 14 and a ceiling surface 15 and a floor surface 16, and is installed so as to surround a sound source or a device 20 to be protected from acoustic excitation. By installing in this way, it is possible to prevent the sound from the outside from entering the inside of the cover and generating vibration.
- the floor surface 16 is not necessarily required, and the device 20 may be directly installed on the floor by, for example, a leg having a vibration isolation mechanism.
- the space-side surface surrounded by the side surfaces and the ceiling surface is referred to as an interior surface
- the external surface is referred to as an exterior surface.
- the interior surface 17 and the exterior surface 18 may be the front and back of a side wall or a ceiling board, and may be comprised by the independent member.
- FIG. 3 shows the necessary functions for the cover structure for the purpose of protecting the device 20 from acoustic excitation.
- cover the sound There are two functions: a function that does not transmit light into the inside, and a function that suppresses the echo of the sound inside the cover.
- a cover that is usually formed of a single layer has a double structure, or a sandwich structure in which an organic porous material 31 is sandwiched therebetween.
- the function of suppressing the echo of the sound inside the cover is called sound absorption, and in order to improve this performance, the sound absorption structure 40 is provided for the cover.
- the organic porous material 31 is generally installed inside a cover that is not normally treated.
- an acoustic standing wave may be generated at a frequency depending on the shape and size of the internal space of the cover, which is a closed space closed by the cover in order to improve sound insulation and sound absorption.
- FIG. 6 shows an example of an acoustic standing wave.
- a traveling wave and a backward wave traveling between two parallel sets of six faces of a cover are standing waves as shown in FIG. Form. For this reason, there has been a problem that the soundproof performance of the cover is extremely deteriorated at the frequency at which this acoustic standing wave is generated.
- the sound insulating structure 30 and the sound absorbing structure 40 that exhibit the effect by aiming at the frequency of the generated acoustic standing wave are required, but the structure shown in FIGS. 4 and 5 is applied. In some cases, it is difficult to extract performance specific to a specific frequency.
- the organic porous material 31 when applied to equipment used in an environment where dustproof properties are required such as a clean room (for example, a charged particle beam device used for inspection, measurement, observation, processing, etc. of semiconductors and liquid crystal substrates), the organic porous material 31 is used. When used, the dust generation property due to the splash of the organic porous material 31 may interfere with the dustproof property of the clean room, which may be a problem.
- a clean room for example, a charged particle beam device used for inspection, measurement, observation, processing, etc. of semiconductors and liquid crystal substrates
- the dust generation property due to the splash of the organic porous material 31 may interfere with the dustproof property of the clean room, which may be a problem.
- Example 6 An example in which the soundproof structure according to the present invention is applied to the cover of the charged particle beam apparatus will be described.
- FIG. 7 is a diagram for explaining an embodiment of the present invention.
- ⁇ Surround the four sides of the device 20 to be soundproofed or seismically isolated with the cover side surface 13, and install the cover ceiling surface 15 on the top of the cover side surface 13.
- a cover floor surface may be provided as shown in FIG. 1 as necessary.
- a space containing the device 20 surrounded by the side surface 13 and the ceiling surface 15 and the floor or a floor surface (not shown) is a space from which vibrations from the outside are to be removed. If no acoustic processing is performed on the cover side surface portion 13, the cover side surface has a flat structure when viewed macroscopically, and the space formed by the cover and the floor can be regarded as a rectangular parallelepiped shape is as follows. An acoustic standing wave having a frequency represented by the following formula is generated.
- the acoustic standing wave generated inside the cover has a specific frequency determined by the shape and size of the space formed by the cover and the floor. As can be seen from Equation 1, the standing wave generated is closer to a single frequency as the inside of the cover is flat and the space formed by the cover and the floor is closer to a rectangular parallelepiped. Further, vibrations with frequencies other than those shown in Equation 1 are naturally damped inside the cover.
- the device 20 and the cover are installed close to each other so that the area surrounded by the cover is small, and a standing wave having a specific frequency is generated. It was not structured. Therefore, a standing wave having a specific frequency is not generated inside the cover, and the cover is not designed to control the frequency of the standing wave generated inside the cover. As a result, sound over a wide frequency band was generated inside the cover.
- the design is made such that standing waves of the intended frequency occur in the space surrounded by the cover by installing the cover side surfaces in parallel and making the interior surface flat without any acoustic treatment.
- a sound absorbing structure 40 having an absorption frequency band including the frequency of the standing wave (acoustic standing wave generation frequency) is installed below the ceiling surface 15.
- the sound-absorbing structure section 40 here has a sound-absorbing effect at the frequency integrally formed with the ceiling plate, a member having a sound-absorbing effect at the acoustic standing wave generation frequency, as represented by the following examples. It refers to a unit that can be attached to a part or a ceiling board and that has a sound absorbing effect at the frequency.
- the size of the cover is determined by examining the installation area of the device, the sound absorption frequency band of the sound absorbing structure, and the size of the space between the cover and the device.
- the sound absorbing structure portion 40 can be more effectively designed by matching the frequency of the maximum value with the acoustic standing wave generation frequency. Can be soundproofed. Although it is desirable that the frequency of the local maximum value and the acoustic standing wave generation frequency coincide with each other, even if they are not completely the same frequency, at the acoustic standing wave generation frequency, 70% or more at the local maximum value.
- the effect of the present invention is sufficiently obtained if the sound absorption coefficient is as follows. Therefore, hereinafter, a frequency band having a sound absorption rate of 70% or more at the maximum value is set as a frequency band near the maximum value.
- the sound absorbing structure 40 installed on the cover ceiling surface 15 in FIG. 7 will be described.
- the detailed structure of the sound absorbing structure 40 is effective for absorbing sound at the specific frequency. Any structure may be used as long as it has low dust generation and can be used in a clean room.
- the acoustic resonator 41 of FIG. 8 has a plurality of holes (throat portions 41a) provided in the cover interior surface, and a hollow portion 41d connected to the throat portions, and baffle portions 41b connecting the throat portions 41a, It consists of a baffle part support member 41c that connects and supports the baffle part 41b to the cover ceiling surface 15.
- a baffle part support member 41c that connects and supports the baffle part 41b to the cover ceiling surface 15.
- the throat portion is provided in the space between the interior surface 17 and the exterior surface 18 so that the cover interior surface is flat, but may be formed by protruding from the interior surface 17 to the convex portion.
- the acoustic standing wave generation frequency is close to a single, and the sound absorbing structure of the present invention can absorb sound more efficiently.
- each part that is, the opening cross-sectional area s, the cavity volume V, the throat length l, and the opening diameter d are designed so that the sound absorption special frequency matches the acoustic standing wave generation frequency shown in Equation 1. By doing so, it is possible to obtain a large soundproofing effect as described above.
- the values of parameters such as the mouth cross-sectional area s, the cavity volume V, the throat length l, and the opening diameter d can be changed for convenience of design, and the sound absorption specialization frequency determined by Equation 2 from each parameter is It may be designed so as to efficiently absorb the acoustic standing wave generation frequency. Specifically, the sound absorption specialization frequency and the acoustic standing wave generation frequency are made to coincide or be close enough.
- the above parameters may be adjusted so that the sound absorption rate of the sound absorbing structure portion at the acoustic standing wave generation frequency is 0.7 or more.
- the sound absorption coefficient ⁇ is represented by 1 ⁇ (reflected wave / incident wave).
- a porous plate 46 having a plurality of holes is provided below the cover ceiling surface 15 so that a cavity 46 d is formed between the porous plate 46 and the ceiling surface 15.
- the attachment portion of the perforated plate 46 is omitted in FIG. 9, it may be integrally formed with the ceiling surface 15 as one member having a hollow portion 46d inside, or formed separately from the ceiling plate and fixed to the side wall. Also good. Further, as will be described later, the porous plate 46 may be attached to the ceiling surface through a support member. However, in consideration of use in a clean room, it is necessary to use a material with low dusting property for the porous plate 46 and the mounting portion.
- the design dimensions in this case are the hole diameter and aperture ratio of the opening, the plate thickness, and the thickness of the back air layer.
- the frequency at which the sound absorption coefficient is maximized by these design dimensions is expressed by the following equation. If the dimensions of each part are designed so that the normalized frequency matches the acoustic standing wave generation frequency expressed by Equation 1, a large soundproofing effect as described above can be obtained.
- the absorption specialization frequency can be adjusted by the aperture ratio and the thickness of the porous plate 42, so that it is possible to design easily.
- FIG. 10 shows a modification of the sound absorbing structure using the porous plate 46 shown in FIGS. 8 and 9, the sound absorbing structure is integrally formed, but in FIG. 10, the porous plate 46 is attached to the cover ceiling surface 15 using a support member 46 c.
- the frequency at which the sound absorption coefficient is maximized can be controlled by the plate thickness.
- the frequency at which the sound absorption coefficient is maximized can be controlled by the plate thickness.
- length As shown in FIG. It is also possible to control by length. By doing so, it is possible to set the maximum frequency of the sound absorption coefficient at a low frequency while reducing the plate thickness.
- it is not necessary to integrally mold it is possible to configure the sound absorbing structure at low cost.
- partition walls 46 f are formed on the inner surface of the ceiling surface 15, that is, on the surface facing the device 20, thereby forming a plurality of cells 46 e.
- a porous plate 46 having a plurality of holes is installed on the lower surface of this cell, that is, the surface facing the device 20, and these are combined to form a porous plate sound absorbing unit 47.
- the plurality of cells 46e hit the hollow portion of the above-described sound absorbing structure and exhibit a sound absorbing action.
- the members constituting the perforated plate sound absorbing unit 47 need to use materials having low dust generation properties in consideration of use in a clean room.
- the perforated plate sound absorbing unit 47 integrated with the ceiling surface 15 is installed as the ceiling portion of the soundproof cover as shown in FIG.
- the number of cells 46e, the volume / depth, the plate thickness of the porous plate 46, the aperture ratio / diameter of the holes provided in the porous plate 46, etc. determine the sound absorption specific frequency. It becomes a parameter.
- the rigidity of the porous plate 46 can be maintained.
- the porous plate 46 vibrates with sound waves, the relative motion of the air between the porous plate and the hole is reduced, and the sound absorption effect is reduced.
- the cell structure of the present embodiment can reduce the vibration of the perforated plate and prevent the sound absorption effect from decreasing.
- the perforated plate sound absorbing unit 47 shown in FIG. 11 can be configured by another method, and an example will be described with reference to FIGS. 13 and 14.
- FIG. 13 shows a cut-out portion of one cell of the perforated plate sound absorbing unit shown in FIG. 11 (hereinafter referred to as a perforated plate sound absorbing module 48).
- a number of such perforated plate sound absorbing modules 48 are manufactured and illustrated.
- 14 may be installed so that the perforated plate 46 is located inside from the soundproof cover ceiling surface.
- each cell is manufactured independently, and finally installed on the ceiling plate 15, so that the size of the exterior cover varies depending on the device type and model number, or the shape of the ceiling surface is changed.
- the number of installed perforated plate sound absorption modules 48 is changed, it is possible to flexibly cope with a design change.
- the perforated plate 46 is installed on the upper portion of the side surface 13 as a member to replace the ceiling surface, so that a rectangular parallelepiped space surrounding the device 20 is formed, and a cavity is formed when attached from above.
- the sound absorbing unit integrated with the ceiling surface 15 is installed.
- the perforated plate sound absorbing unit 47 having a plurality of cell structures partitioned by the partition wall 46f is installed above the perforated plate so that the opening of the cell 46e faces the perforated plate side.
- FIG. 15 an example of the perforated plate sound absorbing unit 47 is described, but naturally the acoustic resonator 41 as shown in FIG. 8 may be attached instead of the perforated plate sound absorbing unit having a cell structure.
- the ceiling surface 15 may be installed above the perforated plate 46 with a gap having an air layer thickness that satisfies Equation 3 above. Further, as shown in FIG. 10, the ceiling surface 15 integrated with the support member 46 c may be attached on the porous plate 46.
- the size of each cell is not uniform and has a distribution.
- the volume may be changed by changing the bottom area of each cell depending on the configuration of the partition wall 46f, or by changing the height of the cell by changing the shape of the porous plate 46 to a curved surface as shown in FIG. The volume may be changed.
- the perforated plate 46 is curved, the interior surface of the ceiling surface is not flat, but the interior surface of the side surface of the cover is flat. Since the acoustic standing wave generated between the side walls hardly depends on the ceiling surface, it is possible to generate an acoustic standing wave of a specific frequency between the side walls by designing and installing the cover in advance. it can.
- An effective soundproof cover can be configured by combining the frequency band of the acoustic standing wave and the sound absorption frequency band of the sound absorbing structure.
- the structure that gives the volume distribution of the cavity as described above has a frequency band with a sound absorption effect, the sound absorption effect is widened while having a maximum value at a specific frequency. be able to.
- the soundproof cover is used as an exterior cover of a charged particle beam apparatus.
- the charged particle beam apparatus mainly refers to inspection apparatuses such as semiconductors and liquid crystal substrates, observation apparatuses, measurement apparatuses, electron microscopes, and focused ion beam apparatuses.
- the present invention can be applied to any apparatus that requires fine processing and high-precision observation.
- these charged particle beam devices are mainly used in clean rooms.
- the sound-absorbing material used for general sound-proof walls is made of dust-generating materials such as glass wool and urethane, and in clean rooms unless measures are taken such as covering with dust-proof materials to prevent dust from scattering. Can not be put in. Even if it is covered with a dustproof material, there is a possibility that it will deteriorate over time and generate dust.
- the present invention is a cover that can obtain a soundproofing effect without using a dust-generating material, the above problems can be solved by using it as an exterior cover for these charged particle beam devices.
- FIG. 17 is a schematic diagram showing an overall configuration of an SEM type defect observation apparatus which is an example of a charged particle beam apparatus.
- the SEM type defect observation apparatus shown in FIG. 17 includes an electron optical system including an electron gun 51, a lens 52, a scanning deflector 53, an objective lens 54, a sample 55, and a secondary particle detector 59, an observation target, and the like.
- the electron optical system controller 60 that controls various optical elements included in the electron optical system, and the secondary particle detector 59 A / D conversion unit 61, stage control unit 62 for controlling stage 56, overall control unit 63, image processing unit 64, operation unit 65 including a pointing device such as a display, a keyboard and a mouse, an optical microscope 67, etc.
- the electron optical system, the electron optical system control unit 60, the A / D conversion unit 61, the stage 56, and the stage control unit 62 described above constitute a scanning electron microscope that is an imaging unit for SEM images.
- a sample 55 is placed on the sample stage by a loader (not shown) that conveys the sample, and is conveyed from the sample preparation chamber 71 into the electron microscope 70.
- the primary electron beam 57 emitted from the electron gun 51 is focused by the lens 52, deflected by the scanning deflector 53, focused by the objective lens 54, and applied to the sample 55.
- Secondary particles 58 such as secondary electrons and reflected electrons are generated from the sample 55 irradiated with the primary electron beam 57 in accordance with the shape and material of the sample.
- the generated secondary particles 58 are detected by the secondary particle detector 59 and then converted into a digital signal by the A / D converter 61.
- the output signal of the secondary particle detector converted into a digital signal may be referred to as an image signal.
- the output signal of the A / D conversion unit 61 is input to the image processing unit 64 to form an SEM image.
- the image processing unit 64 executes various image processing such as defect detection and defect analysis by image comparison.
- the overall control unit 63 is a control unit that comprehensively controls the entire SEM type defect observation apparatus.
- the overall control unit 63 interprets inputs from the operation unit 65 and the storage device 66, and performs an electron optical system control unit 60, a stage control unit 62, and an image.
- the processing unit 64 and the like are controlled, and processing results are output to a display unit (not shown) included in the operation unit 65 and the storage device 66 as necessary.
- Part or all of the overall control unit 63 and the image processing unit 64 described above can be realized by either hardware or software.
- it can be realized by integrating a plurality of arithmetic units for executing necessary processes on a wiring board or in one semiconductor chip or package.
- it can be realized by causing a high-speed general-purpose CPU to execute a program that performs processing configured by software such as image processing.
- FIG. 18 is an external view showing an example of a charged particle beam apparatus according to the present invention.
- An outer cover 80 is provided on the outer periphery of the electron microscope 70 so as to surround the whole.
- the exterior cover 23 is made of a steel plate or resin material.
- An operation door 81 and an operation window 82 are attached to the exterior cover 80 for operation and can be opened and closed.
- the operation window 82 is made of a material such as a steel plate, resin, or glass.
- An observation window 83 for observing the inside is attached.
- the observation window 83 is made of a material such as glass or resin so that the inside can be monitored.
- the operation door 81, the operation window 82, and the observation window 83 are a part of the exterior cover 80, and these are collectively referred to as the exterior cover 80.
- the observation window 83 may be made of a metal material as long as it can be opened and closed.
- the sound absorbing structure 40 is provided on the ceiling surface 15.
- the sound absorbing structure 40 may be any structure of the above embodiments. Since the side surface 13 is not subjected to acoustic processing and the interior surface has a flat structure, a standing wave is generated in the exterior cover.
- the sound absorbing structure portion 40 installed on the cover ceiling surface is designed as in the above embodiments so that the absorption band has a maximum value or near the maximum value at the frequency of the standing wave.
- the exterior cover of the charged particle beam apparatus can be used as a soundproof cover, and obstacles such as image shake due to external vibration can be suppressed.
- the overall control unit 63, the image processing unit 64, and the like are partially or wholly configured by hardware, and therefore, the portion configured by hardware is enclosed as the same exterior casing as the electron microscope. Alternatively, it may be handled as a separate casing surrounded by an exterior plate different from the electron microscope.
- the loader and the control board with a cooling fan for transporting the sample should be separated from each other so that the vibration source is not included in the same housing, or a partition wall in the housing It seems better to put on.
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Abstract
Description
11 側面A
12 側面B
13 側面C
14 側面D
15 天井面
16 床面
17 内装面
18 外装面
20 機器
30 遮音構造部
31 有機多孔質材料
40 吸音構造部
41 音響共鳴器
41a スロート部
41b,46b バッフル部
41c バッフル部支持部材
41d,46d 空洞部
46 多孔板
46a 開口部
46c 支持部材
46e セル
46f 隔壁
47 多孔板吸音ユニット
48 多孔板吸音モジュール
50 荷電粒子線装置
51 電子銃
52 レンズ
53 走査偏向器
54 対物レンズ
55 試料
56 ステージ
57 一次電子ビーム
58 二次粒子
59 二次粒子検出器
60 電子光学系制御部
61 A/D変換部
62 ステージ制御部
63 全体制御部
64 画像処理部
65 操作部
66 記憶装置
67 光学式顕微鏡
70 電子顕微鏡
71 試料準備室
80 外装カバー
81 操作扉
82 操作窓
83 観察窓
Claims (13)
- 試料を戴置する試料ステージが設置された試料室と、
前記試料に荷電粒子線を照射し観察または加工する荷電粒子線照射部と、
前記試料室及び前記荷電粒子線照射部の周囲に設置された側壁と、
前記側壁の上部に位置する面に設置された天井板と、
前記天井板の下方に設けられた、複数の孔部と前記孔部とつながった空洞部からなる吸音構造部とを有し、
前記吸音構造部は前記側壁および前記天井板に囲まれた空間で発生する定在波の周波数帯を含む吸収帯を有することを特徴とする荷電粒子線装置。 - 請求項1に記載の荷電粒子線装置において、
前記定在波の周波数が、前記吸音構造部の吸収帯の極大値をとる周波数、または当該極大値の近傍の周波数帯に含まれることを特徴とする荷電粒子線装置。 - 請求項1に記載の荷電粒子線装置において、
前記定在波の周波数における前記吸音構造部の吸音率は0.7以上であることを特徴とする荷電粒子線装置。 - 請求項1に記載の荷電粒子線装置において、
前記吸音構造部は、前記天井板と接続された支持部材によって前記天井板に取り付けられていることを特徴とする荷電粒子線装置。 - 請求項1に記載の荷電粒子線装置において、
前記空洞部は前記天井板の下面に隔壁で仕切られた複数のセルであって、
前記複数の孔部は前記複数のセルの下面に設けられた多孔板に設けられていることを特徴とする荷電粒子線装置。 - 請求項5に記載の荷電粒子線装置において、
前記セルは一つずつ独立に取り付けできることを特徴とする荷電粒子線装置。 - 請求項5に記載の荷電粒子線装置において、
前記空洞部は容積が異なる複数のセルからなることを特徴とする荷電粒子線装置。 - 請求項1に記載の荷電粒子線装置において、
さらに、前記試料に前記荷電粒子線を照射することで得られる二次荷電粒子を検出する検出器と、前記検出器から画像を形成する画像処理部とを有することを特徴とする荷電粒子線装置。 - 試料を戴置する試料ステージが設置された試料室と、
前記試料を観察または加工する荷電粒子線照射部と、
前記試料室及び前記荷電粒子線照射部を囲むカバーとを有し、
前記カバーは、
前記試料ステージ及び前記荷電粒子線照射部の周囲に設置された側壁と、
前記側壁の上部に位置する面に設置された複数の孔を有する天井板と、
前記天井板の上部に設置されたときに、前記複数の孔につながった空洞部を形成する構造を有する吸音ユニットとからなり、
前記吸音ユニットからなる吸音構造部の吸収周波数帯は、前記カバー内部で発生する定在波の周波数を含むことを特徴とする荷電粒子線装置。 - 請求項9に記載の荷電粒子線装置において、
前記吸音ユニットは隔壁によって構成されたセルを有することを特徴とする荷電粒子線装置。 - 請求項9に記載の荷電粒子線装置において、
前記定在波の周波数が、前記吸音構造部の吸収帯の極大値をとる周波数、または当該極大値の近傍の周波数帯に含まれることを特徴とする荷電粒子線装置。 - 遮音または除震したい機器の周囲に設置された側壁と、
前記側壁の上部に位置する面に設置された天井板と、
前記天井板に対して遮音したい空間側に設けられた複数の孔部と前記孔部とつながった空洞部からなる吸音構造部とを有し、
前記吸音構造部は前記側壁と前記天井板で囲まれた空間に発生する定在波の周波数を吸音する特性をもつことを特徴とする防音カバー。 - 請求項12に記載の防音カバーにおいて、
前記吸音構造部は、前記定在波の周波数における吸音率が0.7以上であることを特徴とする防音カバー。
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012063406A1 (ja) * | 2010-11-09 | 2012-05-18 | 株式会社 日立ハイテクノロジーズ | 荷電粒子線装置 |
WO2013136909A1 (ja) * | 2012-03-13 | 2013-09-19 | 株式会社 日立ハイテクノロジーズ | 荷電粒子線装置用防音カバー及び荷電粒子線装置 |
WO2015093156A1 (ja) * | 2013-12-19 | 2015-06-25 | 株式会社 日立ハイテクノロジーズ | 荷電粒子線装置用防音カバー、及び荷電粒子線装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11021870B1 (en) * | 2013-03-14 | 2021-06-01 | Hrl Laboratories, Llc | Sound blocking enclosures with antiresonant membranes |
US10114299B2 (en) | 2014-06-05 | 2018-10-30 | Asml Netherlands B.V. | Lithographic apparatus |
KR102355136B1 (ko) * | 2014-06-25 | 2022-01-26 | 엘지전자 주식회사 | 리니어 압축기, 리니어 압축기의 쉘, 리니어 압축기의 쉘 제작방법 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11210109A (ja) * | 1998-01-28 | 1999-08-03 | Nikon Corp | 空調装置、隔壁及び露光装置 |
JP3661779B2 (ja) * | 2000-09-29 | 2005-06-22 | 株式会社神戸製鋼所 | 多孔質防音構造体 |
JP2006079870A (ja) * | 2004-09-08 | 2006-03-23 | Hitachi High-Technologies Corp | 荷電粒子線装置 |
JP2007226216A (ja) * | 2006-02-01 | 2007-09-06 | Fei Co | 装置を内部に含む音響遮断用の筐体 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3819007A (en) * | 1973-04-27 | 1974-06-25 | Lockheed Aircraft Corp | Controllable laminar sound absorptive structure |
US6002987A (en) * | 1996-03-26 | 1999-12-14 | Nikon Corporation | Methods to control the environment and exposure apparatus |
WO2003001501A1 (fr) * | 2001-06-21 | 2003-01-03 | Kabushiki Kaisha Kobe Seiko Sho | Corps structural insonorise poreux et procede de fabrication du corps structural |
GB2432609A (en) * | 2004-08-11 | 2007-05-30 | Enventure Global Technology | Method of expansion |
TWI651455B (zh) * | 2009-01-14 | 2019-02-21 | Kuraray Co., Ltd | 隔音板、隔音構造及隔音方法 |
JP5541753B2 (ja) * | 2010-07-15 | 2014-07-09 | アイシン化工株式会社 | 吸音特性構造物 |
-
2011
- 2011-06-03 WO PCT/JP2011/003137 patent/WO2011158458A1/ja active Application Filing
- 2011-06-03 US US13/703,926 patent/US8835883B2/en active Active
- 2011-06-03 JP JP2012520273A patent/JP5645934B2/ja active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11210109A (ja) * | 1998-01-28 | 1999-08-03 | Nikon Corp | 空調装置、隔壁及び露光装置 |
JP3661779B2 (ja) * | 2000-09-29 | 2005-06-22 | 株式会社神戸製鋼所 | 多孔質防音構造体 |
JP2006079870A (ja) * | 2004-09-08 | 2006-03-23 | Hitachi High-Technologies Corp | 荷電粒子線装置 |
JP2007226216A (ja) * | 2006-02-01 | 2007-09-06 | Fei Co | 装置を内部に含む音響遮断用の筐体 |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012063406A1 (ja) * | 2010-11-09 | 2012-05-18 | 株式会社 日立ハイテクノロジーズ | 荷電粒子線装置 |
JP2012104298A (ja) * | 2010-11-09 | 2012-05-31 | Hitachi High-Technologies Corp | 荷電粒子線装置 |
US8822952B2 (en) | 2010-11-09 | 2014-09-02 | Hitachi High-Technologies Corporation | Charged particle beam apparatus having noise absorbing arrangements |
WO2013136909A1 (ja) * | 2012-03-13 | 2013-09-19 | 株式会社 日立ハイテクノロジーズ | 荷電粒子線装置用防音カバー及び荷電粒子線装置 |
JP2013191333A (ja) * | 2012-03-13 | 2013-09-26 | Hitachi High-Technologies Corp | 荷電粒子線装置用防音カバー及び荷電粒子線装置 |
CN104081491A (zh) * | 2012-03-13 | 2014-10-01 | 株式会社日立高新技术 | 带电粒子线装置用隔音罩以及带电粒子线装置 |
WO2015093156A1 (ja) * | 2013-12-19 | 2015-06-25 | 株式会社 日立ハイテクノロジーズ | 荷電粒子線装置用防音カバー、及び荷電粒子線装置 |
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