JP2014143074A - Charged particle beam device, and disc-like sample observation module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To observe a desired outer peripheral surface and side face part of a disc-like sample such as a blade and a disc type sample from a desired direction by moving them to an observation position.SOLUTION: A movement mechanism and a rolling mechanism are additionally provided in a eucentric type sample fine adjusting mechanism, and the mechanism is structured so as to hold the disc-like sample such as a blade and a disc type sample, and the desired outer peripheral surface and side face part of the disc-like sample are thereby moved to the observation position to set them in the desired direction. The vicinity of the desired outer peripheral surface and side face part of the disc-like sample such as a blade and a disc type sample can be observed and analyzed from a desired angle, and adjusting work for observation and analysis is facilitated.

Description

The present invention relates to a charged particle beam apparatus, and more particularly to a charged particle beam apparatus including a sample fine movement device for observing a disk-shaped sample.

  One type of electron microscope is a scanning electron microscope (SEM).

  The SEM sample fine movement device used for observing minute samples is a eucentric side entry sample fine movement device with a spherical bearing, which is mainly used for in-lens SEM that places the sample inside the objective lens. It is installed. Japanese Examined Patent Publication No. 60-232654 (Patent Document 1) discloses a eucentric side entry sample fine movement device having a spherical bearing.

On the other hand, in an out-lens type SEM in which a sample is arranged outside an objective lens, in recent years, a sample chamber and a sample fine movement device have been increased in size due to a desire to observe a larger sample and a heavier sample as they are. The SEM sample fine movement device used for observing large and heavy samples is equipped with an XY movement and rotary movement table and rotated and tilted on the tilt axis in order to expand the movable range and increase the rigidity of the sample fine movement device. There is a eucentric type side entry sample fine movement device having a tilt table that is movable in the vertical direction by a Z movement table. Japanese Patent Laying-Open No. 2005-123129 (Patent Document 2) discloses a eucentric type side entry sample fine movement apparatus having a tilt table.

Japanese Patent Publication No. 60-232654 JP 2005-123129 A

  As a result of intensive studies on the observation of the disk-shaped sample by the present inventors, the following knowledge has been obtained.

  In the out-lens type SEM, samples of various shapes can be observed with the SEM by mounting a eucentric side entry sample fine movement device with a tilt table. However, when observing the side surface of a disk-shaped sample such as a blade or disk type, it is necessary to tilt the sample fine movement device by 90 °. However, if the sample fine movement device is inclined by 90 °, Y of the XYZ movement Since the movement direction of the movement and the Z movement is the same in the Z direction and the movement in the horizontal direction is only in the X direction, the sample cannot be moved to an arbitrary observation position.

  On the other hand, among the eucentric side entry sample fine movement devices having spherical bearings, as in Patent Document 1, the cylinders having spherical bearings are swung from right angles to each other, that is, in two directions of Y movement and Z movement. When the sample fine movement device is tilted 90 °, the Z movement axis at 0 ° tilt becomes the Y movement axis at 90 ° tilt. Therefore, XY movement is possible together with the X movement axis whose movement direction does not change due to the rotation inclination. However, the moving direction is fan-shaped around the spherical bearing, so that the movable range that can be used for Y movement and Z movement is greatly limited. For this reason, in the eucentric type side entry sample fine movement device having a spherical bearing, the sample size that can horizontally move the sample with the sample fine movement device tilted by 90 ° is limited to a very small sample, When observing the side surface of a disk-shaped sample such as a blade or disk type, the sample cannot be moved to the observation position.

An object of the present invention relates to observing from a desired direction by moving a desired outer peripheral surface or side surface portion of a disk-shaped sample such as a blade or a disk type to an observation position.

The present invention further includes a movement mechanism and a rotation mechanism in the eucentric type sample fine movement mechanism, and holds a disk-shaped sample such as a blade or a disk type, thereby allowing a desired outer peripheral surface or side surface portion of the disk-shaped sample. Is moved to the observation position to be in a desired direction.

ADVANTAGE OF THE INVENTION According to this invention, the desired outer peripheral surface and side part vicinity of a disk-shaped sample, such as a braid | blade and a disk type, can be observed and analyzed from a desired angle, and adjustment work for observation and analysis becomes easy.

It is a schematic block diagram which shows an example of a charged particle apparatus. It is the schematic which shows an example of the eucentric type side entry sample fine-movement apparatus which has a spherical bearing incorporating the slide mechanism. It is the schematic (front view) which shows an example of the sample holder front-end | tip part of the eucentric type side entry sample fine movement apparatus which has a spherical bearing. It is the schematic (perspective view) which shows an example of the sample holder front-end | tip part of the eucentric type side entry sample fine movement apparatus which has a spherical bearing. It is the schematic (perspective view seen from the back surface) which shows an example of the sample holder front-end | tip part of the eucentric type side entry sample fine movement apparatus which has a spherical bearing. It is the schematic which shows an example of suitable arrangement | positioning of an electron optical lens-barrel, a sample, a sample fine movement apparatus, and an X-ray detector. It is the schematic which shows an example of the eucentric type side entry sample fine movement apparatus which has a tilt table. It is the schematic which shows an example of the stage module mounted in the eucentric type side entry sample fine movement apparatus which has a tilt table. It is the schematic which shows an example of a Z slide holder mounted in the eucentric type side entry sample fine-movement apparatus which has a tilt table.

In an embodiment, a charged particle beam optical system that irradiates a charged particle beam, a eucentric side entry sample fine movement device that moves the sample to an arbitrary position, and a signal emitted from the sample by irradiation of the charged particle beam In the charged particle beam apparatus comprising: a detector that detects the image; and an image forming apparatus that forms an image of the sample based on an output from the detector. Disclosed is a sample receiving portion that can be held, and a slide portion that can move the sample receiver in a direction perpendicular to the rotation axis of the side entry sample fine movement device. The charged particle beam device is a disk-shaped sample observation module that can be attached to and detached from the eucentric side entry sample fine movement device,
Disclosed is one having a sample receiving portion that can hold a disk-shaped sample at a desired angle and a slide portion that can move the sample receiving portion in a direction perpendicular to the rotation axis of the side entry sample fine movement device.

  Further, in the embodiment, a charged particle beam optical system for irradiating a charged particle beam, a eucentric type sample fine movement device having a rotation mechanism on a tilt table for moving a sample to an arbitrary position, a charged particle beam In a charged particle beam apparatus comprising: a detector that detects a signal emitted from the sample by irradiation; and an image forming apparatus that forms an image of the sample based on an output from the detector. A sample receiver that can hold the disk-shaped sample at a desired angle, and the sample receiver is rotated with respect to the rotation axis of the rotation mechanism so that the central axis of the disk-shaped sample is perpendicular to the rotation axis of the rotation mechanism. And a base portion for holding the same. Also, a disc-shaped sample observation module that is detachable from a eucentric type sample fine-tuning device having a rotation mechanism on a tilt table provided in a charged particle beam device, and that can hold a disc-shaped sample at a desired angle A receiving portion, and a base portion that holds the sample receiver so as to be rotatable with respect to the rotation axis of the rotation mechanism so that a central axis of the disk-shaped sample is perpendicular to the rotation axis of the rotation mechanism. Disclose things.

  Further, in the embodiment, a charged particle beam optical system for irradiating a charged particle beam, a eucentric type sample fine movement device having a rotation mechanism on a tilt table for moving a sample to an arbitrary position, a charged particle beam In a charged particle beam apparatus comprising: a detector that detects a signal emitted from the sample by irradiation; and an image forming apparatus that forms an image of the sample based on an output from the detector. A sample receiving portion capable of holding a disk-shaped sample, and holding the sample receiver such that a central axis of the disk-shaped sample is the same as a rotation axis of the rotating mechanism, and rotating the sample receiver to the rotating mechanism And a slide part that can move in a direction perpendicular to the axis. In addition, the embodiment is a disk-shaped sample observation module that can be attached to and detached from a eucentric sample fine movement device that has a rotating mechanism on a tilt table provided in a charged particle beam apparatus, and can hold a disk-shaped sample. The sample receiver and the disk-shaped sample are held so that the center axis of the disk-shaped sample is the same as the rotation axis of the rotation mechanism, and the sample receiver is perpendicular to the rotation axis of the rotation mechanism. And a slide part that can move in a direction.

  Moreover, in an Example, it discloses that the side entry sample fine movement apparatus can rotate the disk shaped sample hold | maintained at the sample receiving part. Moreover, in an Example, it discloses that the sample fine movement apparatus can rotate the disk shaped sample hold | maintained at the sample receiving part. Moreover, in an Example, it discloses that the disk-shaped sample hold | maintained at the sample receiving part can be rotated in a disk-shaped sample observation module.

  Moreover, in an Example, it discloses that the disk-shaped sample observation module containing a sample receiving part and a slide part is removable from a side entry sample fine movement apparatus. Moreover, in an Example, it discloses that the disk-shaped sample observation module containing a sample receiving part and a base part is removable from a sample fine movement apparatus. Moreover, in an Example, it discloses that the disk-shaped sample observation module containing a sample receiving part and a slide part is removable from a sample fine movement apparatus.

  Moreover, in an Example, it discloses that the detector is arrange | positioned in the direction perpendicular | vertical with respect to the central axis of a disk shaped sample. Moreover, in an Example, it discloses that the said detector is an X-ray detector which detects the X-ray emitted from a sample by irradiation of a charged particle beam.

The above and other novel features and effects will be described below with reference to the drawings. The drawings are used exclusively for understanding the invention and do not limit the invention.

  In this embodiment, a disc-shaped sample observation module is mounted on an out-lens SEM equipped with a eucentric side entry sample fine movement device having a spherical bearing. Hereinafter, description will be given with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a charged particle device (out-lens type SEM) according to the present embodiment. The SEM 1 is an electron optical mirror having an electron source 2, a condenser lens 4 for converging the electron beam 3 emitted from the electron source 2, a deflection coil 5 for scanning the electron beam 3, and an objective lens 6 for focusing the electron beam 3. A cylinder 7 and a controller for adjusting each condition of the electron optical barrel 7 are provided. Also, a secondary electron detector 9 that detects secondary electrons emitted from the sample 8 by irradiation of the electron beam 3 on the sample 8, a semiconductor detector 10 that detects reflected electrons emitted from the sample 8, and a secondary A control device that processes signals from the electron detector 9 and the semiconductor detector 10 and a sample fine movement device 11 that can move the sample 8 to an arbitrary position are provided. In addition, a sample chamber 12 for holding a vacuum, a vacuum exhaust system 13 and the like are provided, and an X-ray detector 14 such as EDX is combined therewith. The electron optical column 7 is provided with a differential exhaust diaphragm for maintaining the sample chamber 12 in an environment having a lower degree of vacuum than the vacuum in the electron optical column. As shown in FIG. Further, as a detector for detecting a signal emitted from the sample 8 in a state where the sample chamber 12 is controlled in a low vacuum, not only the secondary electron detector 9 and the semiconductor detector 10, but also an ion current detection electrode may be used. .

  FIG. 2 is a schematic view of a eucentric type side entry sample fine movement apparatus having a spherical bearing incorporating a slide mechanism according to the present embodiment.

  In the eucentric type side entry sample fine movement apparatus having a spherical bearing according to the present embodiment, a driving mechanism 25 is driven by a driving shaft 24 provided in a cylindrical body 23 having a spherical bearing via a slide mechanism 22 described later. Connected to.

  The drive mechanism 25 has an R-axis movement that rotates around the rotation axis around the sample receiver 21, a T-axis movement that rotates and tilts around the tilt axis 29, an X-axis movement in the direction of the tilt axis 29, and a right angle around the spherical bearing. Swing movement from the direction (that is, two directions of Y-axis movement and Z-axis movement) is possible. In addition, the sample holder 21 can be driven in the vertical direction regardless of the T-axis movement by the drive mechanism 25 by the cylinder 26 that can drive the entire cylinder 23 having the spherical bearing in the vertical direction.

  The eucentric side entry sample fine movement device having these spherical bearings is attached to the SEM through the face plate 27 through the main part of the sample fine movement device through an opening provided on the side wall of the sample chamber 12. When observing with an SEM, the inside of the sample chamber 12 needs to be kept in a vacuum, and is thus vacuum-sealed by the O-ring 28.

  3 to 5 are schematic views of the tip of the sample holder including the slide mechanism 22 of the eucentric type side entry sample fine movement device having a spherical bearing according to the present embodiment. FIG. 3 is a front view as viewed from the Z direction, FIG. 4 is a perspective view, and FIG. 5 is a perspective view as viewed from the back surface, where the optical axis of the SEM is the Z axis.

  In the eucentric side entry sample fine movement apparatus having a spherical bearing according to the present embodiment, a slide mechanism 22 is provided between the sample receiver 21 and the drive shaft 24. Hereinafter, the slide mechanism 22 according to the present embodiment will be specifically described.

  The slide mechanism 22 according to the present embodiment is located on the tip side of the sample holder with respect to the spherical bearing portion, and includes a sample receiving block 31, a feed screw 32, a guide 33, and the like, and the sample in a direction perpendicular to the tilt shaft 29 The receiving block 31 is movable. The sample receiver 21 is provided on the sample receiver block 31 on the Y axis from the SEM beam center position 35 at the origin position of the drive mechanism 25.

  A disk-shaped sample such as a blade or disk type attached to the sample receiver 21 provided in the sample receiver block 31 is rotated along the guide 33 by rotating the feed screw 32 by rotating the slide mechanism knob 34. It moves in the Y-axis direction together with the receiving block 31. Then, the slide mechanism 22 is fixed at the point where the observation position of the disc-shaped sample coincides with the position of the tilt shaft 29, and the observation position of the sample is set to the beam center position 35 of the SEM.

  At this time, since each axis of the drive mechanism 25 is set to the origin position, the observation position using each axis of the drive mechanism 25 can be finely adjusted, and the sample can be moved to a desired observation position. become able to. This is the same even when tilted and moved by the T-axis that is rotated and tilted by the tilt shaft 29. For example, the sample is moved horizontally by using each axis of the drive mechanism 25 even when the sample fine movement device is tilted by 90 °. (XY movement).

  As described above, by arranging the slide mechanism 22 between the sample receiver 21 and the drive shaft 24, the sample receiver 21 can move in the Y-axis direction independently of the Y-axis movement of the drive mechanism 25. Become. The outer peripheral surface and side surface of a disk-shaped sample such as a blade or disk type that could not move the sample to the observation position within the movable range of the Y axis of the drive mechanism 25 that moves like a fan around a spherical bearing It is possible to move the sample to the position, and the observation position can be finely adjusted regardless of the inclination angle of the sample fine movement device.

  In this embodiment, the slider mechanism 22 is arranged so that the sample receiving block 31 can move in the Y-axis direction, which is the same direction as the swinging movement around the spherical bearing, but the direction perpendicular to the tilt axis 29 If it is, it will not be limited to this. For example, the slide mechanism 22 may be arranged so that the sample receiving block 31 can move in the Z-axis direction, and the slide mechanism 22 aligns the observation position of the sample with the beam center position 35 of the SEM independently of the drive mechanism 25. It may be arranged so that it can be made.

  In this embodiment, the slide mechanism knob 34 is arranged in the so-called SEM sample chamber 12 on the tip side of the sample holder with respect to the spherical bearing portion. However, the present invention is not limited to this. For example, like the drive mechanism 25, it may be operated from the atmosphere side.

  Furthermore, in the present embodiment, the inclination angle of the sample fine movement device is 90 °, but is not limited to this. Due to the inclination of the sample fine movement device, the members of the sample fine movement device such as the slide mechanism 22 and the sample 8, the objective lens 6, the secondary electron detector 9, the semiconductor detector 10, etc. of the SEM1 are arranged so as not to interfere with each other. (For example, by increasing the working distance), it is possible to make the inclination angle of the sample fine movement device 90 ° or more.

  As a result, in the conventional SEM with a tilt angle of 90 ° or less of the sample fine movement device, when observing the back surface after observing the surface, the sample 8 is once taken out from the SEM and the sample 8 is placed in the sample receiver 21. It was necessary to observe the sample after moving it to the same observation position with the SEM after mounting it on the front and back sides. Thus, the outer peripheral surface and the side surface of the disk-shaped sample can be observed not only from the front surface direction but also from the back surface direction, and the operation is extremely efficient. Further, it is not necessary to take out the sample 8 from the SEM, and it is possible to reduce contamination of the sample.

  In the present embodiment, the sample receiver 21 is provided with a rotation mechanism, so that the sample attached to the sample receiver 21 can be rotated. Hereinafter, the rotation mechanism for rotating the sample receiver 21 arranged on the sample receiver block 31 via the slide mechanism 22 according to the present embodiment will be specifically described.

  The R axis that rotates around the rotation axis around the sample receiver 21 provided in the drive mechanism 25 is connected to the R axis guide 37 from the drive axis 24 via a plurality of spur gears 36. When connecting to the R-axis, the R-axis guide 37 rotates the direction of the R-axis by 90 ° with the bevel gear 38 so that the movable direction of the slide mechanism 22 matches the direction of the R-axis. The R-axis rotated 90 ° by the bevel gear 38 is connected to the sample receiver 21 disposed on the sample receiver block 31 via the shaft 39 and the worm gear 40 (screw gear 40a and helical gear 40b). Is done.

  Since the position of the sample receiving block 31 moves depending on the size of the sample mounted on the sample receiver 21 and the observation position, the shape of the shaft 39 in the R-axis guide 37 and the shaft mounting portion of the screw gear 40a according to the present embodiment is These are squares instead of circles, so that the rotation of the R axis can be transmitted without fixing the shaft 39 and the screw gear 40a. At this time, since the moving direction of the shaft 39 and the slide mechanism 22 is parallel, the shaft 39 can also move in the shaft mounting portion of the screw gear 40a in accordance with the movement of the position of the sample receiving block 31.

  In the present embodiment, the shapes of the shaft 39 and the shaft mounting portion of the screw gear 40a are squares, but are not limited thereto. For example, it may be a polygon or a key and a keyway. Any combination in which the screw gear 40a rotates in accordance with the rotation of the shaft 39 may be used.

  In this embodiment, a plurality of spur gears 36 are interposed between the drive shaft 24 and the R-axis guide 37, and between the worm gear 40 and the sample receiver 21, but this is because the rotation direction of the R-axis and the reduction ratio are reduced. These mechanisms may be added or omitted as necessary.

  By providing the sample holder 21 with a rotation mechanism, when observing the outer peripheral surface of a disk-shaped sample such as a blade or disk type evenly, it can be easily moved by rotating the sample fine movement device without moving it in a zigzag manner. It becomes possible to observe. In addition, when the sample fine movement device is tilted 90 ° and the side surface is observed uniformly, the sample can be easily observed only by rotational movement without reattaching the sample to the sample receiver 21 for each position of the side surface. It becomes possible and operation becomes very efficient.

In this embodiment, the eucentric type side entry sample fine movement apparatus having a spherical bearing has been described as an example. However, the present invention is not limited to this, but the eucentric type can move in the XYZ direction and rotate and tilt on the T axis. It may be a side entry sample fine movement device.

  In SEM equipped with X-ray detectors 14 such as EDX, qualitative analysis and quantitative analysis of the part being observed by X-ray detector 14 and element distribution analysis by X-ray image, etc. at the same time as image observation by SEM Can be performed.

  However, in the case of disc-shaped samples such as blades and disk types, particularly when analyzing the outer peripheral surface and the blade surface on the side surface of a sample such as a grindstone or cutter, the X-rays are blocked by the unevenness of the sample surface and generated from the sample. However, the X-rays are not sufficiently captured by the X-ray detector 14, and it takes time for the analysis, or a correct analysis result cannot be obtained.

  Therefore, in this embodiment, when analyzing the outer peripheral surface and the side surface portion of a disk-shaped sample such as a blade or a disk type, the electron optical column 7, the sample 8, the sample fine movement device 11, and the X-ray detector 14 are suitable. Hereinafter, the arrangement will be specifically described with a focus on differences from the first embodiment.

  FIG. 6 shows that when analyzing the side surface of the disk-shaped sample in the SEM according to the present embodiment, the sample fine movement device is tilted by 90 °, and the electron beam of the SEM is irradiated from the direction perpendicular to the side surface of the disk-shaped sample. FIG. 6 is a schematic diagram showing an example of a suitable arrangement of the electron optical column 7, the sample 8, the sample fine movement device 11, and the X-ray detector 14.

  The groove of the blade surface is machined along the circumferential direction of the sample side surface (see the enlarged view in FIG. 6). In the sample 8 having a disk shape, the bottom of the groove of the blade surface of the side surface is observed. When analyzing, first, the slide mechanism 22 is used to match the side surface of the sample 8 with the beam center position 35 of the SEM. Next, the sample fine movement device 11 is inclined 90 ° so that the groove of the blade surface on the side surface of the sample 8 and the electron beam 3 are perpendicular to each other.

  Then, by arranging the X-ray detector 14 in a direction parallel to the groove of the blade surface of the side surface of the sample 8, the X-ray 41 generated from the bottom of the groove of the blade surface of the side surface of the sample 8 is Are taken into the X-ray detector 14 without being obstructed by the irregularities of the grooves on the blade surface of the side surface portion.

  Further, by rotating the sample by the sample receiver 21 having the rotation mechanism, the sample 8 can be obtained without changing the arrangement of the groove of the side surface portion of the sample 8, the electron beam 3, and the X-ray detector 14. It becomes possible to continuously analyze the groove of the blade surface of the side surface portion.

In the present embodiment, the arrangement of the X-ray detector 14 suitable for analysis has been described, but the present invention is not limited to the X-ray detector 14. Due to the unevenness of the sample surface between the irradiation position of the electron beam 3 and various detectors that detect secondary electrons, reflected electrons, X-rays, light, etc. generated from the sample 8 by the irradiation of the electron beam 3, Various detectors may be arranged so that various signals are not blocked. For example, the semiconductor detector 10 that detects the reflected electrons is arranged directly below the objective lens 6 so that it is not affected by blocking of the reflected electrons due to the unevenness of the sample 8.

  Examples of the sample fine movement device for observing and analyzing a side surface portion of a disk-shaped sample such as a blade or a disk type are not limited to the first and second embodiments. Therefore, in this embodiment, an example in which a disk-shaped sample observation module having a rotation mechanism is mounted on a conventional stage will be described in detail below, focusing on differences from the first embodiment and the second embodiment.

  FIG. 7 is a schematic view of an example of a eucentric side entry sample fine movement device having a tilt table.

  In a eucentric type side entry sample fine movement apparatus having a tilt table, an XY axis moving mechanism 52 and an R axis moving mechanism 54 that rotates around a rotation axis around a sample receiver 53 are mounted on a tilt table 51. Further, a T-axis moving mechanism 56 that rotates and tilts the tilt table 51 with the tilt shaft 55 and a Z moving mechanism 57 that can drive the tilt table 51 and the entire T-axis moving mechanism 55 in the vertical direction are provided. The eucentric type side entry sample fine movement apparatus having these tilt tables is attached to the SEM by passing the main part of the sample fine movement apparatus through an opening provided in the side wall of the sample chamber 12 through the face plate 27. When observing with an SEM, the inside of the sample chamber 12 needs to be kept in a vacuum, and is thus vacuum-sealed by the O-ring 28.

  FIG. 8 is a schematic view of an example of the stage module of the present embodiment mounted on a eucentric side entry sample fine movement apparatus having a tilt table.

  Since the sample receiver 53 in the eucentric type side entry sample fine movement apparatus having a tilt table is placed on the XY axis movement mechanism 52 and the R axis movement mechanism 54 on the tilt table 51 as described above, the sample fine movement apparatus Is 90 °, the Y and Z movement directions of the XY axis moving mechanism 52 are the same in the Z direction, and the horizontal movement is only in the X direction. The sample cannot be moved to the observation position.

  Therefore, in the Eucentric type side entry sample fine movement apparatus having the tilt table according to the present embodiment, the stage module 61 is placed on the sample receiver 53. Hereinafter, the stage module 61 according to the present embodiment will be specifically described.

  The stage module 61 is placed on the sample receiver 53, and includes a stage module base 62, a rotation mechanism 63, a rotation shaft 64, a sample fixing jig 65, a sample receiver attachment mechanism 66, and the like. The stage module 61 is fixed to the sample receiver 53 via the sample receiver mounting mechanism 66. The sample 8 is fixed with a sample fixing jig 65. The rotating shaft 64 can fix the sample 8 so that the side surface portion of the disk-shaped sample 8 is vertical, and the rotating mechanism 63 can rotate the sample 8 along the circumferential direction of the sample side surface portion.

  As a result, the side surface of the disk-shaped sample 8 can be placed vertically without tilting the sample fine movement device by 90 °, and the XY axis moving mechanism of the sample fine movement device. 52 makes it possible to move the entire stage module 61 along the XY axes, so that the side surface of the disk-shaped sample 8 can be moved to an arbitrary observation position.

  Further, since the stage module 61 is placed on the R-axis moving mechanism 54 of the sample fine movement device, the direction of the sample 8 can be rotated by rotating the entire stage module 61. For this reason, the groove on the blade surface is machined along the circumferential direction of the sample side surface (see the enlarged view in FIG. 6). The bottom of the groove on the blade surface on the side surface of the disk-shaped sample 8 is observed and When analyzing, the secondary electrons, reflected electrons, and X-rays generated from the bottom of the groove of the blade surface of the side surface of the sample are between the detectors and the groove of the blade surface of the side surface of the sample. When blocked by irregularities, by rotating the direction of the sample 8 by the R-axis moving mechanism 54 of the sample fine movement device, secondary electrons, reflected electrons generated from the bottom of the groove on the blade surface of the side surface of the sample, And X-rays can be taken into each detector without being blocked by the irregularities of the groove on the blade surface of the side surface of the sample.

  Further, since the stage module 61 is mounted on the tilt table 51, the T-axis moving mechanism 56 that rotates and tilts the tilt table 51 with the tilt shaft 55, and the tilt table 51 and the entire T-axis moving mechanism 55 are vertically arranged. It is also possible to drive the entire stage module 61 in the tilt direction and the vertical direction by the Z moving mechanism 57 that can be driven in the direction. For example, the entire surface of the stage module 61 is tilted by the T-axis moving mechanism 56, whereby the groove on the blade surface is machined along the circumferential direction of the sample side surface (see the enlarged view in FIG. 6). It becomes possible to observe and analyze not only the bottom of the groove on the blade surface of the side surface of the sample 8, but also the side surface of the groove. Further, by driving the entire stage module 61 in the vertical direction by the Z moving mechanism 57, the focal length of the sample 8 can be adjusted.

  As described above, by adding the stage module 61, it is possible to vertically arrange the side surface portion of the disk-shaped sample 8 while keeping the sample fine movement device horizontal without tilting the sample fine movement device by 90 °. By using the horizontal (XY-axis), rotation (R-axis), tilt (T-axis), and vertical (Z-axis) movement mechanisms of the sample fine movement device, the side surface of a disk-shaped sample such as a blade or disk type can be The sample can be moved to an arbitrary observation position, and the observation position can be finely adjusted.

  Since the stage module 61 is detachable from the sample receiver 53 of the sample fine movement device, the stage module 61 can be used as a Eucentric type side entry sample fine movement device having a normal tilt table by removing the stage module 61. is there.

In this embodiment, the eucentric side entry sample fine movement device having a tilt table has been described as an example. However, the present invention is not limited to this, but the centric type can move in the XYZ direction and rotate and tilt on the TR axis. It may be a sample fine movement device.

  An example for observing and analyzing a side surface portion of a disk-shaped sample such as a blade or a disk type in a eucentric type side entry sample fine movement apparatus having a tilt table is not limited to the first to third embodiments. . Therefore, in this embodiment, an example in which a disk-shaped sample observation module having a Z moving mechanism is mounted on a conventional stage will be described in detail below, focusing on differences from the first to third embodiments.

  FIG. 9 is a schematic view of an example of the Z slide holder of the present embodiment mounted on a eucentric side entry sample fine movement apparatus having a tilt table.

  In the Eucentric type side entry sample fine movement apparatus having the tilt table according to the present embodiment, the Z slide holder 71 is placed on the sample receiver 53. Hereinafter, the Z slide holder 71 of the present embodiment will be specifically described.

  The Z slide holder 71 is placed on the sample receiver 53, and includes a Z slide holder base 72, a Z slide feed screw 73, a Z slide rotation mechanism 74, a sample stage 75, a sample receiver attachment mechanism 76, and the like. The Z slide holder 71 is fixed to the sample receiver 53 via the sample receiver mounting mechanism 76. The sample stage 75 is arranged on a Z slide feed screw 73 that can be moved in the vertical direction by the Z slide rotation mechanism 74, and has a structure that can move in the vertical direction regardless of the Z movement mechanism 57 of the sample fine movement device.

  In order to make the Z slide feed screw 73 movable in the vertical direction, the Z slide rotation mechanism 74 according to this embodiment drives the screw gear 74b by the drive mechanism 74a, and the rotation direction is vertical by the helical gear 74c. Convert to direction. The central shaft portion of the helical gear 74c is threaded, and the screw of the central shaft portion of the helical gear 74c rotates in accordance with the rotation of the helical gear 74c. Goes up and down in the vertical direction. At this time, if the Z slide feed screw 73 rotates together with the rotation of the central shaft portion of the helical gear 74c, the Z slide feed screw 73 cannot move up and down in the vertical direction. The Z slide feed guide 73 prevents the Z slide feed screw 73 from rotating.

  In the eucentric type side entry sample fine movement device with tilt table, when the sample fine movement device is tilted 90 °, the movement direction of Y movement and Z movement in the XY axis movement mechanism 52 is the same in the Z direction. Therefore, since the movement in the horizontal direction is only in the X direction, the sample cannot be moved to an arbitrary observation position. However, by placing the Z slide holder according to the present embodiment on the sample receiver 53, when the sample fine movement device is inclined by 90 °, the Z slide holder 71 itself is also inclined by 90 °. The moving direction is the same direction as the Y moving direction of the XY axis moving mechanism 52. As a result, the sample can be moved horizontally (XY movement) even when the sample fine movement device is tilted by 90 °, so that the side surface of the disk-shaped sample 8 can be moved to an arbitrary observation position. Become.

  As described above, by adding the Z slide holder 71, in the state where the sample fine movement device is inclined by 90 °, in the Ecentric type side entry sample fine movement device having the tilt table, the sample fine movement device is inclined by 90 °. In this case, it is possible to move in the Y direction, which could not be moved, so it is possible to move the sample to any observation position on the side surface of a disk-shaped sample such as a blade or disk type, and fine adjustment of the observation position Is possible.

  Further, the Z slide holder 71 has a structure that can move in the vertical direction regardless of the Z moving mechanism 57 of the sample fine movement device. For this reason, even if the surface of the sample 8 and the tilt axis 55 are misaligned and the observation position escapes when the sample fine movement device is tilted, the sample 8 is once taken out from the SEM, and the sample 8 The surface of the sample 8 can be adjusted with the Z slide feed screw 73 of the Z slide holder 71 without adjusting the sample height so that the surface of the sample is aligned with the tilt axis 55 and reattaching to the SEM. It becomes possible to adjust the tilt axis 55 to coincide with each other, and the operation becomes extremely efficient. Further, it is not necessary to take out the sample 8 from the SEM, and it is possible to reduce contamination of the sample.

  Further, since the Z slide holder 71 is detachable from the sample receiver 53 of the sample fine movement device, the Z slide holder 71 can be used as a Eucentric type side entry sample fine movement device having a normal tilt table by removing the Z slide holder 71. Is possible.

  In this embodiment, the eucentric side entry sample fine movement apparatus having a tilt table has been described as an example. However, the present invention is not limited to this. It may be a sample fine movement device.

In addition, although Example 1 thru | or 4 demonstrated SEM as an example, it is not restricted to this, Charged particle beam apparatuses, such as a FIB apparatus, may be sufficient. In addition, Examples 1 to 4 can be combined as appropriate, and this combination form is also disclosed in this specification.

1 SEM
2 Electron source
3 Electron beam
4 Condenser lens
5 Deflection coil
6 Objective lens
7 Electro-optic tube
8 samples
9 Secondary electron detector
10 Semiconductor detector
11 Sample fine movement device
12 Sample room
13 Vacuum exhaust system
14 X-ray detector
21 Sample holder
22 Slide mechanism
23 Tube with spherical bearing
24 Drive shaft
25 Drive mechanism
26 Cylindrical body that can be driven vertically
27 face plate
28 O-ring
29 Tilt axis
31 Sample receiving block
32 Lead screw
33 Guide
34 Slide mechanism knob
35 SEM beam center position
36 spur gear
37 R-axis guide
38 Bevel gear
39 Shaft
40 Worm gear
40a Screw gear
40b helical gear
41 X-rays generated from the sample
51 Tilt table
52 XY axis movement mechanism
53 Sample receiver
54 R axis moving mechanism
55 Tilt axis
56 T-axis moving mechanism
57 Z movement mechanism
61 stage module
62 stage module base
63 Rotating mechanism
64 rotating shaft
65 Sample fixing jig
66 Sample holder mounting mechanism
71 Z slide holder
72 Z Slide holder base
73 Z slide feed screw
74 Z slide rotation mechanism
74a Drive mechanism
74b screw gear
74c helical gear
75 Sample stage
76 Sample holder mounting mechanism
77 Z slide feed guide

Claims (20)

A charged particle beam optical system for irradiating a charged particle beam;
A eucentric side-entry sample fine movement device that moves the sample to any position;
A detector for detecting a signal emitted from the sample by irradiation of a charged particle beam;
An image forming apparatus for forming an image of the sample based on an output from the detector;
In a charged particle beam apparatus comprising:
The side entry sample fine movement device includes a sample receiving portion that can hold a disk-shaped sample at a desired angle, and a slide portion that can move the sample receptacle in a direction perpendicular to the rotation axis of the side entry sample fine movement device. A charged particle beam apparatus characterized by that.
The charged particle beam apparatus according to claim 1,
The charged particle beam apparatus characterized in that the side entry sample fine movement device can rotate the disk-shaped sample held in the sample receiving portion.
The charged particle beam apparatus according to claim 1,
A charged particle beam apparatus, wherein a disk-like sample observation module including the sample receiving part and the slide part is detachable from the side entry sample fine movement apparatus.
The charged particle beam apparatus according to claim 1,
The charged particle beam apparatus, wherein the detector is arranged in a direction perpendicular to a central axis of the disk-shaped sample.
The charged particle beam device according to claim 4.
A charged particle beam apparatus, wherein the detector is an X-ray detector that detects X-rays emitted from the sample by irradiation of a charged particle beam.
A charged particle beam optical system for irradiating a charged particle beam;
A eucentric type sample fine movement device having a rotation mechanism on a tilt table that moves the sample to an arbitrary position;
A detector for detecting a signal emitted from the sample by irradiation of a charged particle beam;
An image forming apparatus for forming an image of the sample based on an output from the detector;
In a charged particle beam apparatus comprising:
The sample fine movement device has a sample receiving portion capable of holding a disk-shaped sample at a desired angle, and the sample receiver is attached to the rotating mechanism so that a central axis of the disk-shaped sample is perpendicular to a rotation axis of the rotating mechanism. A charged particle beam device comprising: a base portion that is rotatably held with respect to a rotating shaft.
The charged particle beam apparatus according to claim 6.
The charged particle beam device characterized in that the sample fine movement device can rotate the disk-shaped sample held in the sample receiving portion.
The charged particle beam apparatus according to claim 6.
A charged particle beam apparatus, wherein a disk-like sample observation module including the sample receiving part and the base part is detachable from the sample fine movement apparatus.
The charged particle beam apparatus according to claim 6.
The charged particle beam apparatus, wherein the detector is arranged in a direction perpendicular to a central axis of the disk-shaped sample.
The charged particle beam apparatus according to claim 9, wherein
A charged particle beam apparatus, wherein the detector is an X-ray detector that detects X-rays emitted from the sample by irradiation of a charged particle beam.
A charged particle beam optical system for irradiating a charged particle beam;
A eucentric type sample fine movement device having a rotation mechanism on a tilt table that moves the sample to an arbitrary position;
A detector for detecting a signal emitted from the sample by irradiation of a charged particle beam;
An image forming apparatus for forming an image of the sample based on an output from the detector;
In a charged particle beam apparatus comprising:
The sample fine movement device holds the sample receiver so that the center axis of the disk-shaped sample is the same as the rotation axis of the rotating mechanism, and the sample receiver. A charged particle beam apparatus, comprising: a slide portion that can move in a direction perpendicular to a rotation axis of the rotation mechanism.
The charged particle beam apparatus according to claim 11, wherein
A charged particle beam apparatus, wherein a disk-shaped sample observation module including the sample receiving part and the slide part is detachable from the sample fine movement apparatus.
The charged particle beam apparatus according to claim 11, wherein
The charged particle beam apparatus, wherein the detector is arranged in a direction perpendicular to a central axis of the disk-shaped sample.
The charged particle beam device according to claim 13.
A charged particle beam apparatus, wherein the detector is an X-ray detector that detects X-rays emitted from the sample by irradiation of a charged particle beam.
A disc-shaped sample observation module that can be attached to and detached from the eucentric side entry sample fine movement device provided in the charged particle beam device,
A disk-shaped sample comprising: a sample receiving part capable of holding the disk-shaped sample at a desired angle; and a slide part capable of moving the sample receiver in a direction perpendicular to the rotation axis of the side entry sample fine movement device. Observation module.
In the disk-shaped sample observation module according to claim 15,
A disk-shaped sample observation module, wherein the disk-shaped sample held in the sample receiving portion can be rotated.
A disc-shaped sample observation module that can be attached to and detached from a eucentric sample fine movement device having a rotation mechanism on a tilt table provided in a charged particle beam device,
A sample receiver that can hold the disk-shaped sample at a desired angle, and the sample receiver is rotated with respect to the rotation axis of the rotation mechanism so that the central axis of the disk-shaped sample is perpendicular to the rotation axis of the rotation mechanism. A disc-like sample observation module comprising: a base portion that can be held.
The disc-shaped sample observation module according to claim 17,
A disk-shaped sample observation module, wherein the disk-shaped sample held in the sample receiving portion can be rotated.
A disc-shaped sample observation module that can be attached to and detached from a eucentric sample fine movement device having a rotation mechanism on a tilt table provided in a charged particle beam device,
A sample receiving portion capable of holding a disk-shaped sample, and holding the sample receiver such that a central axis of the disk-shaped sample is the same as a rotation axis of the rotating mechanism, and rotating the sample receiver to the rotating mechanism A disk-like sample observation module comprising: a slide portion that can move in a direction perpendicular to the axis.
In the disk-shaped sample observation module according to claim 19,
A disk-shaped sample observation module, wherein the disk-shaped sample held in the sample receiving portion can be rotated.