WO2022264287A1 - ステージ装置、荷電粒子線装置および真空装置 - Google Patents
ステージ装置、荷電粒子線装置および真空装置 Download PDFInfo
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- WO2022264287A1 WO2022264287A1 PCT/JP2021/022742 JP2021022742W WO2022264287A1 WO 2022264287 A1 WO2022264287 A1 WO 2022264287A1 JP 2021022742 W JP2021022742 W JP 2021022742W WO 2022264287 A1 WO2022264287 A1 WO 2022264287A1
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- 238000001816 cooling Methods 0.000 claims description 29
- 230000005484 gravity Effects 0.000 claims description 24
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- 238000005339 levitation Methods 0.000 description 39
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- 238000011109 contamination Methods 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
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- 238000006073 displacement reaction Methods 0.000 description 1
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- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
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- 239000002184 metal Substances 0.000 description 1
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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
- H01J37/20—Means for supporting or positioning the object or the material; Means for adjusting diaphragms or lenses associated with the support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/68—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for positioning, orientation or alignment
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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
- H01J2237/002—Cooling arrangements
-
- 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
- H01J2237/20—Positioning, supporting, modifying or maintaining the physical state of objects being observed or treated
- H01J2237/202—Movement
- H01J2237/20221—Translation
- H01J2237/20235—Z movement or adjustment
-
- 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
- H01J2237/20—Positioning, supporting, modifying or maintaining the physical state of objects being observed or treated
- H01J2237/202—Movement
- H01J2237/20278—Motorised movement
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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
Definitions
- the present disclosure relates to a stage device, a charged particle beam device and a vacuum device.
- Patent Document 1 describes a magnetic levitation stage mechanism for moving a device.
- This magnetic levitation plane stage mechanism has a structure in which a magnetic material is placed on the side of the levitated movable table, and gravitational support is performed by an electromagnetic actuator on the stationary side.
- the gravity of the levitation is supported by the upward thrust produced by the coil current.
- the conventional stage device is used to accurately position the semiconductor wafer.
- improvement in the positioning accuracy of the semiconductor wafer is required.
- the heat generated by the coil becomes enormous and the coil burns out.
- there is a problem of leakage magnetic field and it is difficult to apply to a charged particle beam device.
- the present disclosure provides a stage device, a charged particle beam device, and a vacuum device capable of suppressing magnetic field leakage and performing high-speed positioning by solving the above-described problems of the conventional technology.
- the present invention provides a stage, a Z-axis motor that magnetically levitates the stage, and an X-axis motor that drives the stage levitated by the Z-axis motor in one axial direction within a plane.
- the X-axis motor includes an X-axis coil, a pair of X-axis magnets that are not in contact with the X-axis coil and face each other across the X-axis coil in the vertical direction, and a pair of X-axis magnets.
- the Z-axis motor has a Z-axis coil, a Z-axis magnet, and a Z-axis yoke that holds the Z-axis magnet.
- the Z-axis motor is located below the X-axis motor. The magnetic field leaked from the Z-axis motor is arranged at a position where the X-axis yoke shields it.
- the present invention provides a stage device having a table on which a sample is placed, a vacuum chamber housing the stage device and evacuating the inside thereof, and a table of the stage device.
- a charged particle beam apparatus comprising: a charged particle beam optical system for irradiating a mounted sample with a charged particle beam; and a controller for controlling stage means, a vacuum chamber, and the charged particle beam optical system.
- the X-axis motor has an X-axis coil, a pair of X-axis magnets facing each other across the X-axis coil in the vertical direction without contact with the X-axis coil, and an X-axis yoke that holds the pair of X-axis magnets.
- the motor has a Z-axis coil, a Z-axis magnet, and a Z-axis yoke that holds the Z-axis magnet. It was configured to be placed in a position where
- the present invention provides a vacuum apparatus comprising a stage device and a vacuum chamber for accommodating the stage device and evacuating the interior thereof, wherein the stage device comprises a stage and the vacuum chamber. It comprises a Z-axis motor that magnetically levitates the stage, and an X-axis motor that drives the stage levitated by the Z-axis motor in one axial direction within a plane.
- the Z-axis motor has a pair of X-axis magnets facing each other across the X-axis coil in the vertical direction without contact with the axis coil, and an X-axis yoke that holds the pair of X-axis magnets.
- a Z-axis magnet and a Z-axis yoke for holding the Z-axis magnet are provided, and the Z-axis motor is positioned below the X-axis motor so that the magnetic field leaked from the Z-axis motor is shielded by the X-axis yoke. Configured.
- FIG. 4 is a front view showing a schematic configuration of a motor with an open magnetic circuit
- FIG. 2 is a front view showing a schematic configuration of a motor with a closed magnetic circuit
- FIG. 2 is a front view showing a schematic configuration of a repulsion type gravity compensation actuator
- 1 is a front view showing a schematic configuration of a suction-type gravity compensation actuator
- FIG. 1 is a front view showing a schematic configuration of a magnetic levitation stage showing a reference example of the present invention
- FIG. FIG. 2 is a front view showing a schematic configuration in which an X-axis motor for explaining the principle of the present invention and a Z-axis motor having Z drive and gravity compensation functions are superimposed.
- FIG. 1 is a front view showing the layout of a water cooling jacket, an X-axis motor, and a Z-axis motor for explaining the principle of the present invention
- FIG. 1 is a front view showing a schematic configuration of a stage device according to Example 1 of the present invention
- FIG. It is a front view showing a schematic configuration of a charged particle beam device according to a second embodiment of the present invention.
- X direction For a magnetic levitation stage having a stroke of several hundred mm in one axis direction (X direction), an example of a motor in the longitudinal axis direction (X-axis motor shaft), which is a component of the magnetic levitation stage, will be described. Since the X-axis motor needs to secure thrust over a long stroke of several hundred mm, it is necessary to use a three-phase AC linear motor. They are roughly divided into two types according to the shape of the magnetic circuit of the yoke.
- FIG. 1 is an example of a yoke linear motor 100 with an open magnetic circuit.
- a coil 107 is arranged between two permanent magnets 105, and a current is passed through the coil 107 to obtain thrust.
- the magnetic flux 108 is absorbed by the yoke 106 on the back side of the permanent magnet 105, but since the yokes 106 are separated from each other, the magnetic flux 108 passes through space and enters the back side of the yoke 106 on the opposite side.
- the linear motor 100 having such a shape in which the magnetic circuit of the yoke 106 is open has the advantage of being simple in structure, but has the problem that the leakage magnetic field from the yoke 106 is large.
- FIG. 2 is an example of a linear motor 110 with a U-shaped yoke in which the magnetic circuit is closed.
- the U-shaped yoke 116 is used in the linear motor 110 having such a closed magnetic circuit.
- the magnetic flux 118 entering the U-shaped yoke 116 from one of the pair of permanent magnets 115 arranged facing each other flows through the U-shaped yoke 116 with little leakage to the outside. through into the permanent magnet 115 on the corresponding side.
- the leakage magnetic field generated by leakage of the magnetic flux 118 is small.
- the present invention applies this principle.
- the Z-axis motor that compensates for the gravity of the levitation section and generates thrust in the Z-axis direction. If it is attempted to support the gravity of the levitation part only by the thrust obtained by the coil current, a relatively large current must be applied to the coil, resulting in enormous heat generation in the coil. Therefore, it is effective to use magnetic repulsive force or magnetic attractive force for the Z-axis motor from the viewpoint of reducing coil heat generation during gravity compensation.
- FIG. 3 is an example of a gravity compensation actuator 300 that uses repulsive force.
- Permanent magnets 301 are spread over a yoke 302 on the fixed side, and a repulsive force 313 between the permanent magnets 301 and the permanent magnets 125 attached to the yoke 126 on the movable side supports the gravity of the floating portion.
- a repulsive force 313 between the permanent magnets 301 and the permanent magnets 125 attached to the yoke 126 on the movable side supports the gravity of the floating portion.
- By adjusting the amount of current flowing through the coil 127 it is possible to increase or decrease the repulsive force and drive it in the vertical direction (Z direction). can.
- Z direction vertical direction
- FIG. 4 is an example of a gravity compensation actuator 400 that uses suction force.
- the permanent magnet 145 of the linear motor 140 composed of the permanent magnet 145, the yoke 146, and the coil 147 is attracted to the guide yoke 402 made of a magnetic material such as an iron-based material on the fixed side, thereby generating a magnetic attraction force 401.
- the guide yoke 402 is made of a ferrous material, its length can be freely set according to the movable range of the linear motor 140 .
- the attractive force between the guide yoke 402 and the permanent magnet 145 can be increased or decreased, and driving in the vertical direction (Z direction) is also possible. can be adjusted. Since the magnetic attraction force 401 is constant within the stroke where the guide yoke 402 exists, it is suitable for lengthening the stroke.
- FIG. 5 shows a magnetic levitation stage 500 as a reference example of the present invention.
- the X-axis motor 510 has a U-shaped yoke 516 as described with reference to FIG. 2, and the Z-axis motor 520 has a suction type as described with reference to FIG.
- 101 is a top table
- 102 is a bar mirror
- 103 is a sample table
- 104 is a sample placed on the sample table 103 .
- a water-cooling jacket 508 also serves as an X-stage, and a water-cooling pipe 507 passes through the interior thereof.
- a top table support column 509 is fixed to the water cooling jacket 508 , and the top table 101 is supported by the top table support column 509 .
- a Z-axis motor 520 includes a coil 527, a permanent magnet 525, and a yoke 526, and is arranged in a pair on the left and right sides of the water cooling jacket 508.
- the pair of Z-axis motors 520 are fixed by side brackets 541 to a water cooling jacket 508 that also serves as an X stage.
- An X-axis motor 510 includes a coil 517, a permanent magnet 515, and a yoke 516.
- the coil 517 is fixed by a central bracket 542 to a water-cooling jacket 508 that also functions as an X stage. Fixed.
- a Y-axis motor 530 includes a coil 537 , a permanent magnet 535 and a yoke 536 . Fixed.
- a pair of yokes 514 are fixed to the Y table 540 at positions facing the pair of Z-axis motors 520 . Also, the Y table 540 is guided by a lower shaft linear guide 545 via a spherical body 544 .
- the magnetic levitation stage 500 shown in FIG. 5 has a stack type stage configuration in which an X-axis stage configured with a water cooling jacket 508 is mounted on a Y-axis stage configured with a Y table 540.
- the shaft (lower shaft) is guided by a contact rolling guide, and the X-axis (upper shaft) is non-contacted by a magnetic levitation guide. That is, the upper shaft is a magnetic levitation stage with a stroke of several hundred mm in the X-axis direction.
- the coil 537 of the Y-axis motor 530 and the coil 517 of the X-axis motor 510 are on the levitation side, it is necessary to mount a water cooling jacket 508 containing water cooling pipes 507 for cooling the coils.
- the Z-axis motor 520 needs to be placed with a wide gap on both sides in order to control the inclination of the levitation part. should be placed in Therefore, the X-axis motor 510 (and the Y-axis motor 530) must also be placed at a low position, resulting in a structure with a large gap 552 between the horizontal axis driving center 551 and the height 550 of the center of gravity.
- the present invention is intended to solve the above-described problems, and eliminates the need to increase the current necessary for the coils of the Z-axis motor by suppressing the pitching moment (rotational force around the Y-axis) from being generated when the stage is driven. It was made possible to suppress the heat generation of the coil during driving.
- FIG. 6 shows a configuration in which the Z-axis motor 620 is arranged below the X-axis motor 610 .
- the permanent magnet 625 yoke 626 and the coil 627 of the Z-axis motor 620 are arranged under the U-shaped yoke 616 of the X-axis motor 610, and the coil 627 is energized to rotate the Z-axis motor.
- a suction force 601 acts on 620 to form a suction type gravity compensation actuator/Z-axis motor 620 .
- the surface 6161 of the yoke 606 of the X-axis motor 610 facing the Z-axis motor also has a role corresponding to the guide yoke 402 described with reference to FIG.
- the yoke 514 in the magnetic levitation stage 500 becomes unnecessary.
- FIG. 7 explains the principle of this embodiment.
- the configuration shown in FIG. 7 shows a state in which the X-axis motor 610 and Z-axis motor 620 described in FIG. 6 are attached to a block 711 corresponding to the water cooling jacket 508 in the magnetic levitation stage 500 in FIG.
- a block 711 supports a table 712 corresponding to the top table 101 in the magnetic levitation stage 500 of FIG.
- the X-axis motor 610 and the Z-axis motor 620 are arranged in pairs on the left and right sides of the block 711 , and the yoke 616 of the X-axis motor 610 is fixed to the wall surface 710 . Also, the coil 617 of the X-axis motor 610 and the yoke 626 and coil 627 of the Z-axis motor 620 are fixed to the block 711 .
- an attraction force 601 acts on the yoke 616 fixed to the wall surface 710 of the X-axis motor 610 and the Z-axis motor 620, and the Z axis functions as an attraction-type gravity compensation actuator.
- the shaft motor 620 floats integrally with the block 711 and the table 712 . By controlling the current flowing through the coil 617 of the X-axis motor 610 in this state, the block 711, the table 712, and the Z-axis motor 620 move in the X direction on the horizontal drive center 701 in a levitated state.
- the occurrence of pitching can be suppressed even if the current flowing through the coil 627 of the Z-axis motor 620 is reduced. Heat generation of the Z-axis motor 620 can be suppressed.
- the present embodiment relates to a stage apparatus having a support stage for supporting an object to be positioned and a levitation mechanism for magnetically levitating and positioning the support stage.
- a permanent magnet and a coil are arranged under the X yoke of the X motor of the levitation mechanism to constitute the gravity compensation mechanism and the Z actuator.
- FIG. 8 shows a schematic configuration of a low-magnetic-field magnetic levitation stage 800 realized by this embodiment, the principle of which has been explained with reference to FIGS.
- the water cooling jacket 858 corresponding to the block 711 shown in FIG. 7
- the X-axis motor 810 corresponding to the X-axis motor 610
- the Z-axis motor 620 corresponding to A motor 820 and a Y-axis motor 830 are provided.
- the yoke 816 of the X-axis motor 810 is fixed to the Y table 809, and the coil 817 of the X-axis motor 810 is fixed to the water cooling jacket 858 via the block 818.
- the yoke 826 of the Z-axis motor 820 is fixed to the water cooling jacket 858 via a block 828 .
- the yoke 836 of the Y-axis motor 830 is fixed to the Y table 809 and the coil 837 is fixed to the water cooling jacket 858 via the block 838 .
- the Y table 809 is guided by a lower shaft linear guide 962 via a sphere 961 .
- Arrows indicate the heat flow 803 from the coils 817, 827 and 837 of each motor, which are heat sources.
- the coil 817 of the X-axis motor 810 is directly fixed to the water cooling jacket 508 by a block 818
- the coil 827 of the Z-axis motor 820 is directly fixed to the water cooling jacket 508 by a block 828. Shortening the heat flow path to jacket 858 enables efficient coil cooling.
- the magnetic levitation stage 800 is equipped with a linear scale composed of a scale head 841 fixed on the water cooling jacket 858 side and a scale plate 842 fixed on the Y table 809 side. Position measurement of the water cooling jacket 858 is performed.
- a linear scale composed of a scale head 841 fixed on the water cooling jacket 858 side and a scale plate 842 fixed on the Y table 809 side. Position measurement of the water cooling jacket 858 is performed.
- FIG. 8 an example is shown in which a 1-axis linear scale is mounted, but for stable floating control, it is necessary to mount a 6-axis linear scale.
- the relative displacement between the scale head 841 and the scale plate 842 is measured and used for positioning feedback control of the water cooling jacket 858 that is the floating part.
- the scale head 841 like the coils 817, 827 and 837 of each motor, is a source of heat and must be cooled to prevent heat transfer to the top table. In the configuration shown in FIG. 8, the scale head 841 is directly fixed to the water cooling jacket 858, so the cooling efficiency is high.
- the top table 101 on which the sample table 103 is mounted is also fixed via the top table support column 509 from the water cooling jacket 858, so that the heat generated by the coils 817, 827 and 837 of each motor and the scale head 841 is mounted on the sample table 103. It is possible to prevent it from being transmitted to the sample 104 to which it is exposed.
- the magnets and coils are arranged below the two U-shaped X yokes, and the openings of the X yokes are arranged inside the coils. is fixed to the water cooling jacket.
- the position of the center of gravity of the portion including the water-cooled jacket 858 and the top table 101 which are levitated by operating the Z-axis motor 820 is the horizontal axis as described in FIG. It is adjusted so that it overlaps on the driving center 701 .
- the center of gravity can be driven while being superimposed on the horizontal-axis drive center 701, reducing the pitching moment. The occurrence can be suppressed.
- FIG. 9 shows an example in which the magnetic levitation stage 800 described in the first embodiment is applied to a charged particle beam device and a vacuum device.
- a semiconductor measurement apparatus 1900 which is an embodiment of the charged particle beam apparatus and the vacuum apparatus according to the present embodiment shown in FIG. It has A semiconductor measuring apparatus 1900 according to this embodiment is, for example, a length measuring SEM as an application apparatus of a scanning electron microscope (SEM).
- a stage device 1910 has the same configuration as the magnetic levitation stage 800 described with reference to FIG. 8 in the first embodiment.
- a semiconductor measuring device 1900 includes, for example, a stage device 1910, a vacuum chamber 1901, an electron optical system barrel 1902, a damping mount 1903, a laser interferometer 1904, and a controller 1905.
- a vacuum chamber 1901 accommodates the stage device 1910, and the inside is decompressed by a vacuum pump (not shown) to a vacuum state lower than the atmospheric pressure.
- a vacuum chamber 1901 is supported by a damping mount 1903 so that the stage device 1910 and electron optical system barrel 1902 are not affected by external vibrations.
- a semiconductor measuring apparatus 1900 positions an object 1906 such as a semiconductor wafer by a stage device 1910, irradiates an electron beam onto the object from an electron optical system lens barrel 1902, images a pattern on the object, and measures the pattern. Measure line width and evaluate shape accuracy.
- the position (position in the Y direction) of the bar mirror 102 is measured by the laser interferometer 1904, and the position (position in the X direction) of the scale plate 842 is measured by the scale head 841 described with reference to FIG.
- a controller 1905 controls the positioning of an object such as a semiconductor wafer held on the sample stage 103 of the stage device 1910 in the XY directions.
- the top table 101 stops and only a small current flows through the coil 807 of the X-axis motor 810 and the coil 837 of the Y-axis motor 830 .
- the Z-axis motor 820 is in operation and a relatively large current flows through the coil 827 .
- the magnetic field generated on the top table 101 side is trapped by the yoke 816 of the X-axis motor 810, and the magnetic field leaking to the top table 101 side becomes smaller.
- the influence on the electron beam irradiated onto the object 1906 from the electron optical system barrel 1902 can be reduced to a negligible extent.
- the stage device 1910 of the semiconductor measuring apparatus 1900 by adopting the configuration of the magnetic levitation stage 800 described in the first embodiment with reference to FIG. It is possible to prevent contamination on the surface of the object 1906 caused by metal powder generated from sliding portions when a stage using a moving guide is employed.
- the position of the object 1906 placed on the sample stage 103 changes due to the thermal expansion of the stage caused by the sliding portion becoming a heat source.
- the position of the electron beam irradiated onto the object from the electron optical system lens barrel 1902 may shift due to the fluctuation.
- the semiconductor measuring apparatus 1900 according to the present embodiment since the configuration of the magnetic levitation stage 800 is adopted, heat generation due to sliding can be eliminated, and the problem of electron beam irradiation position deviation due to thermal expansion can be eliminated. can be eliminated.
- non-contact, high-speed and highly accurate positioning can be realized, for example, in about 1/100 of the time required when using a conventional sliding guide mechanism. It has become possible to perform positioning with an accuracy of about ⁇ 1 ⁇ m.
- the vibration, deformation, and heat of the lower table are not transmitted to the magnetically levitated upper table. It is possible to remove the cause of the decrease.
- the semiconductor measurement apparatus 1900 includes the magnetic levitation stage 800 as the stage apparatus 1910, thereby improving the positioning accuracy of the object such as a wafer and suppressing magnetic field leakage. . Therefore, it is possible to improve the measurement accuracy of the semiconductor measuring device as a charged particle beam device. Further, since the levitation mechanism of the magnetic levitation stage 800 is of the magnetic levitation type, it can be easily applied to a semiconductor measurement device, which is a vacuum device, and can exhibit excellent effects such as reduction of contamination and suppression of heat generation. . Note that the charged particle beam device and the vacuum device of the present disclosure are not limited to semiconductor measurement devices.
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Abstract
Description
101 トップテーブル
102 バーミラー
103 試料台
104 試料
105、115,125,145 永久磁石
106、116,126,146 ヨーク
107、117,127,147 コイル
108、118、128,148 磁束
300、400 重力補償アクチュエータ
301 永久磁石
402 ガイドヨーク
403 バックヨーク
500,800 磁気浮上ステージ
510,610,810 X軸モータ
515,615,815 X軸モータの永久磁石
516,616,816 X軸モータのヨーク
517,617,817 X軸モータのコイル
520,620,820 Z軸モータ
525,625,825 Z軸モータの永久磁石
526,626,826 Z軸モータのヨーク
527,627,827 Z軸モータのコイル
530,830 Y軸モータ
535,835 Y軸モータの永久磁石
536,836 Y軸モータのヨーク
537,837 Y軸モータのコイル
540 Yテーブル
841 スケールヘッド
842 スケールプレート
858 水冷ジャケット
1900 半導体計測装置
1901 真空チャンバ
1902 電子光学系鏡筒
1905 コントローラ
Claims (13)
- ステージと、前記ステージを磁気で浮上させるZ軸モータと、前記Z軸モータにより浮上させられた前記ステージを平面内で1軸方向に駆動するX軸モータとを備えたステージ装置であって、
前記X軸モータは、X軸コイルと、前記X軸コイルと非接触で前記X軸コイルを上下方向で挟んで対向する1対のX軸磁石と、前記1対のX軸磁石を保持するX軸ヨークを備え、
前記Z軸モータは、Z軸コイルとZ軸磁石と前記Z軸磁石を保持するZ軸ヨークを備え、
前記Z軸モータは前記X軸モータの下部にあって前記Z軸モータから漏れた磁界が前記X軸ヨークで遮蔽される位置に配置されていることを特徴とするステージ装置。 - 請求項1記載のステージ装置であって、
前記X軸ヨークは、前記X軸コイルを上下方向で挟む前記1対のX軸磁石の外側を覆って前記ステージに対向する面が解放されている断面がコの字形状を有し、前記Z軸モータは前記X軸ヨークの下部に配置されていることを特徴とするステージ装置。 - 請求項2記載のステージ装置であって、
前記ステージの外側に配置された壁面を有する筐体部を更に備え、前記X軸モータの前記X軸コイルと前記Z軸モータは前記ステージに支持されており、前記X軸ヨークは前記筐体部の前記ステージの外側に配置された壁面に固定されていることを特徴とするステージ装置。 - 請求項3記載のステージ装置であって、
前記X軸ヨークの前記Z軸モータに面する部分は、前記Z軸モータで発生させた磁場により前記Z軸モータを磁気吸引することにより前記Z軸モータを前記ステージと一緒に浮上させることを特徴とするステージ装置。 - 請求項1記載のステージ装置であって、
前記X軸モータにより前記ステージを前記1軸方向に駆動する駆動中心の高さと、前記Z軸モータにより浮上されている前記ステージを含む部分の重心の高さが同じであることを特徴とするステージ装置。 - 請求項1記載のステージ装置であって、
前記ステージは、試料を搭載するテーブルと、内部に冷却水用配管を備えた水冷ジャケットとを備えていることを特徴とするステージ装置。 - 試料を載置するテーブルを備えたステージ装置と、前記ステージ装置を収容して内部を真空に排気する真空チャンバと、前記ステージ装置の前記テーブルに載置した前記試料に荷電粒子線を照射する荷電粒子線光学系部と、前記ステージ装置と前記真空チャンバと前記荷電粒子線光学系部とを制御する制御部とを備えた荷電粒子線装置であって、
前記ステージ装置は、
前記テーブルを搭載するステージと、前記ステージを磁気で浮上させるZ軸モータと、前記Z軸モータにより浮上させられた前記ステージを平面内で1軸方向に駆動するX軸モータとを備え、
前記X軸モータは、X軸コイルと、前記X軸コイルと非接触で前記X軸コイルを上下方向で挟んで対向する1対のX軸磁石と、前記1対のX軸磁石を保持するX軸ヨークを備え、
前記Z軸モータは、Z軸コイルとZ軸磁石と前記Z軸磁石を保持するZ軸ヨークを備え、
前記Z軸モータは前記X軸モータの下部にあって前記Z軸モータから漏れた磁界が前記X軸ヨークで遮蔽される位置に配置されている
ことを特徴とする荷電粒子線装置。 - 請求項7記載の荷電粒子線装置であって、
前記ステージ装置の前記X軸ヨークは、前記X軸コイルを上下方向で挟む前記1対のX軸磁石の外側を覆って前記ステージに対向する面が解放されている断面がコの字形状を有し、前記Z軸モータは前記X軸ヨークの下部に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8記載の荷電粒子線装置であって、
前記ステージ装置は前記ステージの外側に配置された壁面を有する筐体部を更に備え、前記X軸モータの前記X軸コイルと前記Z軸モータは前記ステージに支持されており、前記X軸ヨークは前記筐体部の前記ステージの外側に配置された壁面に固定されていることを特徴とする荷電粒子線装置。 - 請求項9記載の荷電粒子線装置であって、
前記ステージ装置の前記X軸ヨークの前記Z軸モータに面する部分は、前記Z軸モータで発生させた磁場により前記Z軸モータを磁気吸引することにより前記Z軸モータを前記ステージと一緒に浮上させることを特徴とする荷電粒子線装置。 - 請求項7記載の荷電粒子線装置であって、
前記ステージ装置は、前記ステージ装置を前記1軸方向と直角な方向に駆動するY軸モータと、前記ステージの前記1軸方向の位置を非接触で計測する1軸方向位置計測部と、前記1軸方向と直角方向の位置を非接触で計測する直角方向位置計測部とを備え、前記制御部は、前記1軸方向位置計測部と前記直角方向位置計測部とで計測した前記ステージの位置情報に基づいて前記X軸モータと前記Y軸モータとを制御することを特徴とする荷電粒子線装置。 - ステージ装置と、前記ステージ装置を収容して内部を真空に排気する真空チャンバとを備えた真空装置であって、
前記ステージ装置は、
ステージと、前記ステージを磁気で浮上させるZ軸モータと、前記Z軸モータにより浮上させられた前記ステージを平面内で1軸方向に駆動するX軸モータとを備え、
前記X軸モータは、X軸コイルと、前記X軸コイルと非接触で前記X軸コイルを上下方向で挟んで対向する1対のX軸磁石と、前記1対のX軸磁石を保持するX軸ヨークを備え、
前記Z軸モータは、Z軸コイルとZ軸磁石と前記Z軸磁石を保持するZ軸ヨークを備え、
前記Z軸モータは前記X軸モータの下部にあって前記Z軸モータから漏れた磁界が前記X軸ヨークで遮蔽される位置に配置されている
ことを特徴とする真空装置。 - 請求項12記載の真空装置であって、
前記ステージ装置は、前記ステージ装置を前記1軸方向と直角な方向に駆動するY軸モータと、前記ステージの前記1軸方向の位置を非接触で計測する1軸方向位置計測部と、前記1軸方向と直角方向の位置を非接触で計測する直角方向位置計測部とを備えることを特徴とする真空装置。
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JPH11186156A (ja) * | 1997-12-18 | 1999-07-09 | Ebara Corp | Xyステージ |
WO2011108170A1 (ja) * | 2010-03-04 | 2011-09-09 | 株式会社安川電機 | ステージ装置 |
JP2017011008A (ja) * | 2015-06-18 | 2017-01-12 | キヤノン株式会社 | ステージ装置、リソグラフィ装置、および物品の製造方法 |
JP2021022582A (ja) * | 2019-07-24 | 2021-02-18 | 株式会社日立製作所 | 磁気浮上ステージ装置、および、それを用いた荷電粒子線装置または真空装置 |
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JP7467093B2 (ja) * | 2019-12-06 | 2024-04-15 | キヤノン株式会社 | 搬送システムおよび物品の製造方法 |
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JPH11186156A (ja) * | 1997-12-18 | 1999-07-09 | Ebara Corp | Xyステージ |
WO2011108170A1 (ja) * | 2010-03-04 | 2011-09-09 | 株式会社安川電機 | ステージ装置 |
JP2017011008A (ja) * | 2015-06-18 | 2017-01-12 | キヤノン株式会社 | ステージ装置、リソグラフィ装置、および物品の製造方法 |
JP2021022582A (ja) * | 2019-07-24 | 2021-02-18 | 株式会社日立製作所 | 磁気浮上ステージ装置、および、それを用いた荷電粒子線装置または真空装置 |
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