Cleaving device

Abstract

This invention provides a cleaving device for cleaving samples, including a sample substrate and an adhesive rod bonded to the sample substrate. The device includes: a sample holder assembly for fixing the sample substrate; and an impactor disposed on the sample holder assembly, movable on the sample holder assembly. The movable impactor impacts the adhesive rod to knock it off the sample substrate. Based on the technical solution of this invention, the adhesive rod is knocked off the sample substrate by rotating the impactor. Compared with related technologies, which involve moving the sample holder and the sample above it as a whole so that the adhesive rod detaches from the sample substrate upon contact with a cutting edge, this invention avoids the problem of the sample holder or sample substrate detaching during movement. This improves the stability and reliability of the cleaving device.

Description

Technical Field

[0001] This invention relates to the field of cleaving equipment technology, and particularly to a cleaving apparatus. Background Technology

[0002] Currently, cleavage techniques are widely used in sample preparation for scientific instruments such as X-ray photoelectron spectroscopy, X-ray diffraction, scanning tunneling microscopy, and angle-resolved photoelectron spectroscopy. However, cleaving some samples in the atmosphere can lead to surface oxidation and contamination. Furthermore, samples exposed to the atmosphere may experience atomic surface reconstruction due to molecular thermal motion. Therefore, most cleavage processes are performed in high-vacuum or ultra-high-vacuum environments, or in cryogenic environments. There are few commercially available devices capable of performing cleavage simultaneously in multiple environments, including high-temperature, low-temperature, and phase transition temperature ranges. Moreover, due to space constraints, compact and simple cleavage devices are more favored by researchers.

[0003] In related technologies, small and simple cleaving devices typically achieve impact cleaving by moving the sample holder and the sample on it so that the sample comes into contact with the cutting edge. However, during the movement of the sample substrate, the sample holder or sample substrate may detach, which can affect the cleaving of the sample.

[0004] In other words, when the cleaving device in the relevant technology cleaves the sample, there is a problem that the sample holder or sample substrate may fall off the cleaving device. Summary of the Invention

[0005] To address the problems in the prior art, this application proposes a cleaving device that solves the problem of sample holders or sample substrates detaching from the cleaving device.

[0006] The present invention provides a cleaving apparatus for cleaving a sample, the sample including a sample substrate and an adhesive rod adhered to the sample substrate. The cleaving apparatus includes: a sample holder assembly for fixing the sample substrate; and an impact part disposed on the sample holder assembly, the impact part being movable on the sample holder assembly; wherein the impact part is capable of impacting the adhesive rod to knock the adhesive rod off the sample substrate.

[0007] In one embodiment, a limiting part is also included, which is disposed on the sample holder assembly to limit the movement position of the impacting part. In this embodiment, the limiting part has a limiting function, preventing the impacting part from accidentally rotating to the impact position and impacting the adhesive rod, thus preventing damage. This ensures that the cleaving device can be used correctly, and consequently ensures that the sample can be cleaved smoothly.

[0008] In one embodiment, the impact unit includes: a push rod rotatably mounted on the sample holder assembly; a drive assembly for driving the push rod to rotate; wherein a limiting part is used to limit the rotational position of the push rod. In this embodiment, the drive assembly drives the push rod to rotate to the impact position, thereby impacting the adhesive rod and ensuring that the adhesive rod can detach from the sample substrate. Ultimately, this ensures that the cleaving device can successfully cleave the sample.

[0009] In one embodiment, the driving component includes: a fixing block fixed to the sample holder assembly; and a compression spring disposed between the fixing block and the push rod. When the push rod abuts against the limiting part, the push rod presses the compression spring against the fixing block, and the compression spring is in a compressed state. In this embodiment, when the compression spring is in a compressed state, it applies a rebound force to the push rod, causing the push rod to rotate under the action of the rebound force, thereby rotating it to the impact position and impacting the adhesive rod to achieve the sample cleaving function of the cleaving device. Furthermore, since the push rod presses the compression spring against the fixing block when it abuts against the limiting part, the compression spring is in a compressed state. Thus, as long as the limiting part is moved so that it is no longer in contact with the push rod, the push rod will automatically rotate and impact the adhesive rod under the action of the rebound force to achieve the cleaving function. This achieves a semi-automatic cleaving function of the cleaving device, thereby improving the ease of use of the cleaving device.

[0010] In one embodiment, the drive assembly further includes a spring-loaded balancing pad disposed between the compression spring and the push rod. This embodiment ensures that the push rod experiences uniform force, thereby guaranteeing stable rotation to the impact position and further improving the stability and reliability of the cleaving device.

[0011] In one embodiment, the drive assembly further includes an adjusting rod that passes through the fixed block, and a compression spring is sleeved on the adjusting rod. In this embodiment, the adjusting rod is used to mount the compression spring and also has a guiding function, ensuring that the compression spring can extend and retract along the axial direction of the adjusting rod, thereby ensuring uniform force on the push rod and thus ensuring stable operation of the cleaving device. Furthermore, the compression spring can extend and retract in a fixed direction, which extends its service life and thus saves on the installation and maintenance costs of the cleaving device.

[0012] In one embodiment, the limiting part includes: a stop bar rotatably disposed on the sample holder assembly; and a torsion spring, one end of which is connected to the sample holder assembly and the other end of which abuts against the stop bar.

[0013] In one embodiment, the limiting part further includes a limiting block, which is disposed on the sample holder assembly and used to limit the rotational position of the stop rod. In this embodiment, the torsion spring enables the stop rod to have an automatic return function; that is, after the push rod impacts the adhesive rod, when it returns to its initial position, the compression spring is in a compressed state. Under the restoring force applied by the torsion spring, the stop rod can quickly rotate back to its initial position, thereby limiting the rotational position of the impacting part, i.e., limiting it to the initial position. This achieves the limiting function of the limiting part.

[0014] In one embodiment, the sample holder assembly includes: a base plate having a groove; a sample holder that can slide into the groove in a first direction, the sample holder being used to fix a sample; and a lower pressure plate disposed on the base plate for pressing the sample holder firmly into the groove.

[0015] In one embodiment, the sample holder assembly further includes an upper pressure plate disposed on the base plate for pressing the lower pressure plate against the sample holder. This embodiment ensures that the sample holder is better pressed and fixed within the groove, thereby improving the stability and reliability of the cleaving apparatus.

[0016] The above-mentioned technical features can be combined in various suitable ways or replaced by equivalent technical features, as long as the purpose of the present invention can be achieved.

[0017] The cleaving apparatus provided by this invention has at least the following advantages compared with the prior art:

[0018] 1. The adhesive rod is knocked off the sample substrate by impacting it with a rotating impactor. Compared with related technologies, which involve moving the sample holder and the sample on it as a whole so that the adhesive rod detaches from the sample substrate upon contact with the blade, this method avoids the problem of the sample holder or sample substrate detaching during the movement of the sample substrate. This improves the stability and reliability of the cleavage device.

[0019] 2. At the same time, since the compression spring and torsion spring exert consistent force with each operation, the area where the sticky rod falls after being struck is also precise, which facilitates the recycling of the sticky rod after the device is disassembled. Attached Figure Description

[0020] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0021] Figure 1 This shows a three-dimensional structural diagram of the cleavage device structure of the present invention;

[0022] Figure 2 Showing Figure 1 A schematic diagram of the cleavage apparatus from another angle (top view);

[0023] Figure 3 Showing Figure 2 Cross-sectional view at point AA;

[0024] Figure 4 Showing Figure 1 A schematic diagram of the cleavage apparatus from another angle.

[0025] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0026] Figure label:

[0027] 10. Sample holder assembly; 11. Base plate; 111. Slide groove; 12. Sample holder; 13. Lower pressure plate; 14. Upper pressure plate; 20. Impact part; 21. Push rod; 211. Adjusting rod; 212. Beveled blade; 213. Limiting nut; 22. Drive assembly; 221. Fixing block; 222. Compression spring; 223. Elastic balance pad; 23. Support column; 30. Limiting part; 31. Stop bar; 311. Angled handle; 312. Limiting protrusion; 32. Torsion spring; 33. Limiting block; 34. Threaded connector; 100. Sample; 101. Sample base; 102. Adhesive rod. Detailed Implementation

[0028] The invention will now be further described with reference to the accompanying drawings.

[0029] It should be noted that the first direction in this application refers to Figure 2 In the width direction of the cleaving device, the cleaving device in this application is used to cleave the sample 100, which includes a sample substrate 101 and an adhesive rod 102 bonded to the sample substrate 101.

[0030] It should be noted that the cleaving device in this application is used in conjunction with a robotic gripper to achieve the cleaving of the sample 100.

[0031] like Figures 1 to 4 As shown, the present invention provides a cleaving apparatus, which includes a sample holder assembly 10 and an impact part 20. The sample holder assembly 10 is used to fix a sample substrate 101, and the impact part 20 is rotatably disposed on the sample holder assembly 10. Rotating the rotatable portion of the impact part 20 can impact an adhesive rod 102 to knock the adhesive rod 102 off the sample substrate 101.

[0032] In the above configuration, the adhesive rod 102 is struck by the rotating impact part 20, causing it to be knocked off the sample substrate 101. Compared to related technologies, where the adhesive rod 102 is detached from the sample substrate 101 after hitting the cutting edge by moving the sample holder and the sample 100 as a whole, this avoids the problem of the sample holder or sample substrate 101 detaching during movement. This improves the stability and reliability of the cleavage device.

[0033] It should be noted that the impact part 20 is not limited to being rotatably disposed on the sample holder assembly 10, but can also be disposed to translate on the sample holder assembly 10, or can be disposed to both translate and rotate on the sample holder assembly 10.

[0034] Specifically, such as Figures 1 to 4 As shown, in one embodiment, the cleaving device further includes a limiting part 30, which is disposed on the sample holder assembly 10 and is used to limit the rotational position of the impact part 20.

[0035] In the above configuration, the limiting part 30 has a limiting function to prevent the impact part 20 from accidentally rotating to the impact position and impacting the adhesive rod 102, thus preventing damage. This ensures that the cleaving device can be used correctly, and in turn, ensures that the sample 100 can be cleaved smoothly.

[0036] Specifically, such as Figures 1 to 4 As shown, in one embodiment, the impact part 20 includes a push rod 21 and a drive assembly 22. The push rod 21 is rotatably mounted on the sample holder assembly 10, and the drive assembly 22 drives the push rod 21 to rotate. A limiting part 30 limits the rotational position of the push rod 21.

[0037] In the above configuration, the drive assembly 22 drives the push rod 21 to rotate to the impact position, thereby impacting the adhesive rod 102 and ensuring that the adhesive rod 102 can detach from the sample substrate 101. Ultimately, this ensures that the cleaving device can successfully cleave the sample 100.

[0038] Specifically, such as Figures 1 to 4 As shown, in one embodiment, the impact part 20 further includes a support column 23, which is disposed on the sample holder assembly 10 and is used to rotatably connect the push rod 21 to the sample holder assembly 10.

[0039] Specifically, such as Figures 1 to 4 As shown, in one embodiment, the drive assembly 22 includes a fixing block 221 and a compression spring 222. The fixing block 221 is fixed to the sample holder assembly 10, and the compression spring 222 is disposed between the fixing block 221 and the push rod 21. When the push rod 21 abuts against the limiting part 30, the push rod 21 presses the compression spring 222 onto the fixing block 221, and the compression spring 222 is in a compressed state.

[0040] In the above configuration, when the compression spring 222 is compressed, it applies a restoring force to the push rod 21. This causes the push rod 21 to rotate under the influence of the restoring force, reaching the impact position and thus impacting the adhesive rod 102, thereby achieving the cleaving function of the cleaving device on the sample 100. Furthermore, when the push rod 21 contacts the limiting part 30, it presses the compression spring 222 against the fixing block 221, keeping the spring compressed. Therefore, by moving the limiting part 30 so that it no longer contacts the push rod 21, the push rod 21 will automatically rotate and impact the adhesive rod 102 under the influence of the restoring force, achieving the cleaving function. This achieves a semi-automatic cleaving function of the cleaving device, thereby improving its ease of use.

[0041] Of course, in alternative embodiments not shown in this application, the drive component 22 may also be configured with other structures, such as using a drive motor or a hydraulic cylinder for drive.

[0042] Specifically, such as Figures 1 to 4 As shown, in one embodiment, the drive assembly 22 further includes an elastic balance pad 223 disposed between the compression spring 222 and the push rod 21.

[0043] In the above configuration, the elastic balance pad 223 can make the push rod 21 bear force evenly, thereby ensuring that the push rod 21 can rotate stably to the impact position, further improving the stability and reliability of the decomposition device.

[0044] Specifically, such as Figures 1 to 4 As shown, in one embodiment, the drive assembly 22 further includes an adjusting rod 211, which passes through the fixed block 221, and a compression spring 222 is sleeved on the adjusting rod 211.

[0045] In the above configuration, the adjusting rod 211 is used to mount the compression spring 222. The adjusting rod 211 also has a guiding function, ensuring that the compression spring 222 can extend and retract along the axial direction of the adjusting rod 211, thereby ensuring uniform force on the push rod 21 and ensuring stable operation of the cleaving device. Furthermore, the compression spring 222 can extend and retract in a fixed direction, which extends its service life and thus saves on the installation and maintenance costs of the cleaving device.

[0046] Specifically, such as Figures 1 to 4 As shown, in one embodiment, the adjusting rod 211 passes through the elliptical hole at the end of the push rod 21, and is clearance-fitted with it. The adjusting rod 211 and the compression spring 222 are coaxially fitted, and the adjusting rod 211 and the limiting nut 213 are connected by threads. The adjusting rod 211 and the fixing block 221 are connected by threads.

[0047] It should be noted that the adjusting rod 211 has two functions. First, it limits the movement of the push rod 21 by passing through the elliptical hole in the push rod 21, restricting the push rod 21 to rotate only along the support column 23 and preventing the end of the push rod 21 from shaking up and down. Second, the adjusting rod 211 has a guiding function. By connecting with the compression spring 222, it guides the compression spring 222 to move along the axial direction of the adjusting rod 211. Simultaneously, the end of the adjusting rod 211 has a limiting nut 213, which acts as a limit when the push rod 21 rotates to the designated position.

[0048] Specifically, such as Figures 1 to 4 As shown, in one embodiment, the limiting part 30 includes a stop bar 31 and a torsion spring 32. The stop bar 31 is rotatably mounted on the sample holder assembly 10, and one end of the torsion spring 32 is connected to the sample holder assembly 10, while the other end abuts against the stop bar 31.

[0049] In the above configuration, the torsion spring 32 enables the stop lever 31 to have an automatic return function. That is, after the push rod 21 completes its impact on the adhesive rod 102, when it returns to its initial position, the compression spring 222 is in a compressed state. Under the action of the restoring force applied by the torsion spring 32, the stop lever 31 can quickly rotate back to its initial position, thereby limiting the rotational position of the impact part 20, that is, limiting it to the initial position. This achieves the limiting function of the limiting part 30.

[0050] It should be noted that the cleaving device in this application is convenient to use in conjunction with the robotic gripper. The robotic gripper only needs to rotate clockwise to push the push rod 21 to its initial position, and by rotating clockwise, it can push the stop rod 31 to a position where it does not abut against the push rod 21. This simplifies the operation of the robotic gripper, thereby improving the cleaving efficiency of the sample 100.

[0051] Specifically, in one embodiment, the torsion spring 32 and the compression spring 222 exert consistent, essentially fixed forces each time they operate. This ensures that the area where the adhesive rod 102 falls after being struck is precisely defined, with the fallen rods concentrating within this area and preventing them from scattering. This facilitates the subsequent recovery of the adhesive rod 102 after the disassembly process, thereby improving the recovery efficiency of the adhesive rod 102.

[0052] It should be noted that as the cumulative frequency of use of the torsion spring 32 and the compression spring 222 increases, the elastic force generated when the torsion spring 32 and the compression spring 222 deforms will weaken. When the force weakens to a certain extent, they can be replaced to ensure that the cleaving device can work normally.

[0053] Specifically, such as Figures 1 to 4As shown, in one embodiment, the limiting part 30 further includes a limiting block 33, which is disposed on the sample holder assembly 10 and is used to limit the rotation position of the stop bar 31.

[0054] In the above configuration, the limiting block 33 has a limiting function, which ensures that the stop rod 31 can accurately rotate back to its initial position and prevents it from deviating from its initial position due to excessive rotation angle, thereby ensuring that the push rod 21 can be accurately limited to its initial position. This, in turn, ensures that the cleaving device can work normally.

[0055] Specifically, such as Figures 1 to 4 As shown, in one embodiment, the sample holder assembly 10 includes a base plate 11, a sample holder 12, and a lower pressure plate 13. The base plate 11 has a groove 111, into which the sample holder 12 can slide along a first direction. The sample holder 12 is used to fix the sample 100. The lower pressure plate 13 is disposed on the base plate 11 and is used to press the sample holder 12 into the groove 111.

[0056] It should be noted that the lower pressure plate 13 can be made of spring sheet, which ensures that the sample holder 12 can slide into the slide groove 111 in the first direction without removing the lower pressure plate 13. The spring sheet deforms and generates a rebound force, which presses the sample holder 12 tightly. The lower pressure plate 13 is threadedly connected to the base plate 11 by threaded fasteners.

[0057] Specifically, such as Figures 1 to 4 As shown, in one embodiment, the sample holder assembly 10 further includes an upper pressure plate 14, which is disposed on the base plate 11 and is used to press the lower pressure plate 13 onto the sample holder 12.

[0058] In the above configuration, the upper pressure plate 14 ensures that the sample holder 12 is better pressed and fixed within the slide groove 111, thereby improving the stability and reliability of the cleaving device.

[0059] It should be noted that the upper pressure plate 14 is threadedly connected to the base plate 11 via a threaded fastener. The upper pressure plate 14 and the lower pressure plate 13 can share a single threaded fastener.

[0060] Specifically, such as Figures 1 to 4 As shown, in one embodiment, the limiting part 30 further includes a threaded connector 34, which is disposed on the base plate 11, and the torsion spring 32 is sleeved on the threaded connector 34.

[0061] Specifically, such as Figures 1 to 4 As shown, in one embodiment, the threaded connector 34 includes a connecting bolt and a nut disposed thereon. One end of the connecting bolt is threaded onto the base plate 11, and the stop 31 and the nut are sleeved on the other end of the connecting bolt, with the stop 31 located below the nut.

[0062] Specifically, such as Figures 1 to 4 As shown, in one embodiment, the support column 23 includes a connecting bolt and a nut disposed thereon. One end of the connecting bolt passes through the bottom of the base plate 11 and the push rod 21 sequentially. There are two nuts, which are fitted onto the connecting bolt, and the push rod 21 is disposed between the two nuts. Rotating the two nuts can fix the push rod 21 to the connecting bolt.

[0063] The working process of the cleavage device in this application is described below:

[0064] The sample holder 12 is placed into the slot (slide groove 111) of the cleaving device by a robotic gripper. Then, by pushing the inclined handle 311 at the end of the stop rod 31, the stop rod 31 rotates. After the limiting protrusion 312 on the stop rod 31 moves away from the end of the push rod 21, the push rod 21 rotates along the support column 23. When the push rod 21 momentarily contacts the adhesive rod 102, the inclined blade 212 on the push rod 21 knocks off the adhesive rod 102. The adhesive rod 102 cleaves the surface of the sample substrate 101, realizing the cleaving function of the sample substrate 101. After cleaving, the sample holder 12 can be removed by the robotic gripper. After the sample holder 12 is removed, the robotic gripper can push the push rod 21, causing the push rod 21 to rotate back to its original position. At the same time, the limiting block 33 ensures that the stop rod 31 cannot swing to one side of the sample holder 12 under the torque of the torsion spring, and the stop rod 31 automatically resets under the action of the torsion spring.

[0065] The cleaving device of this application can operate in high temperature, normal temperature, variable temperature, and low temperature environments. It can be used in high vacuum or ultra-high vacuum environments. It is simple to use, and can be repeatedly used with the assistance of a robotic gripper in almost the same degree of freedom (rotation direction). The operation requirements of the robotic gripper are low. The device can perform cleaving in any degree of freedom direction without spatial limitations. The device is small and can be placed in a relatively compact space in the vacuum chamber, making it particularly suitable for places with space constraints or operational requirements.

[0066] The device is protected by any mirror orientation and different material transformations. It is not limited to material characterization and related fields, but can be used in all other possible technical fields. The scope of protection can be extended to the entire equipment industry.

[0067] The main disadvantages of cleaving equipment in related technologies are as follows:

[0068] 1. The feasibility of using tape peeling and cleavage is poor in low-temperature environments;

[0069] 2. Using a tapping sample holder and moving it to allow the sample to contact the cutting edge for cleavage, this method carries the risk of the sample holder or sample substrate detaching or other problems during movement, as the sample is too close to the cutting edge. Furthermore, after the sample substrate surface has been cut, removing the sample holder can easily cause secondary damage to the freshly cleaved outer surface.

[0070] 3. While achieving the purpose of cleavage, the existing cleavage device has an additional moving rod, which requires at least one interface to be opened on the vacuum cavity for installing the moving rod. The cleavage method requires more tools to be inserted into the vacuum cavity, and the device is not stable enough during cleavage. The operation inside the cavity requires high skill from the operator.

[0071] The cleaving apparatus of the present invention solves the above problems, and has the following characteristics:

[0072] 1. The structure is novel and the design is ingenious. By combining compression springs and torsion springs, the semi-automation of the cleavage process is achieved.

[0073] 2. The device can be cleaved by moving forces in almost the same direction of freedom, requiring little external assistance, being simple to operate, and being reusable;

[0074] 3. The sample substrate is fixed on the base, and the sample substrate does not move during the cleavage process;

[0075] 4. Since the compression spring and torsion spring exert consistent force with each operation, the area where the adhesive rod 102 falls after being struck is also precise. After the device is disassembled, it is beneficial to recover the adhesive rod 102.

[0076] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0077] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A cleaving device, characterized by, The cleaving device is used for cleaving a sample, the sample comprising a sample substrate and a stick adhered to the sample substrate, and the cleaving device comprises: a sample holder assembly for fixing the sample substrate; a striking part arranged on the sample holder assembly, the striking part being movable on the sample holder assembly; wherein the striking part is capable of striking the stick to knock the stick off the sample substrate; further comprising a limiting part arranged on the sample holder assembly for limiting the movement position of the striking part; the striking part comprises: a push rod rotatably arranged on the sample holder assembly; a driving assembly for driving the push rod to rotate; wherein the limiting part is used for limiting the rotation position of the push rod; the driving assembly comprises: a fixed block fixed on the sample holder assembly; a compression spring arranged between the fixed block and the push rod; when the push rod is in abutting contact with the limiting part, the push rod presses the compression spring on the fixed block, and the compression spring is in a compressed state, the limiting part comprises: a blocking rod rotatably arranged on the sample holder assembly; a torsion spring having one end connected to the sample holder assembly and the other end in abutting contact with the blocking rod; the limiting part further comprises a limiting block arranged on the sample holder assembly for limiting the rotation position of the blocking rod; a limiting protrusion is arranged on the blocking rod, the side of the limiting protrusion away from the torsion spring being a guide inclined surface, and the push rod comprises a first end matched with the limiting protrusion, when the push rod is reset, the first end is in abutting contact with the guide inclined surface, and the first end can apply a rotation torque to the blocking rod away from the limiting block; the driving assembly further comprises an adjusting rod, the adjusting rod being threaded on the fixed block, and the compression spring being sleeved on the adjusting rod; the adjusting rod passes through an elliptical hole in the end of the push rod and is in clearance fit with the push rod, and the adjusting rod and the fixed block are in threaded connection.

2. The cleaving apparatus of claim 1, wherein, The driving assembly further comprises an elastic balance pad arranged between the compression spring and the push rod.

3. The cleaving apparatus of any one of claims 1-2, wherein, The sample holder assembly comprises: a bottom plate having a sliding groove; a sample holder capable of sliding into the sliding groove in a first direction, the sample holder being used for fixing the sample; a lower pressing plate arranged on the bottom plate for pressing the sample holder in the sliding groove.

4. The cleaving apparatus of claim 3, wherein, The sample holder assembly further comprises an upper pressing plate arranged on the bottom plate for pressing the lower pressing plate on the sample holder.

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