Large-diameter germanium single crystal taking device

Abstract

The large-diameter germanium single crystal taking device comprises a hanging assembly, a sliding rod assembly and a frame body, the hanging assemblies are arranged on the two sides of the sliding rod assembly in pairs, and the frame body is arranged on the sliding rod assembly in a sliding mode. A buffer cushion is laid in the frame body; the top end of the hanging assembly is clamped with a flange on the outer side wall of the single crystal furnace cover; and the frame body is hung below the single crystal furnace cover through the hanging assembly and moves along with the furnace cover. According to the device, upward lifting force generated by the seed crystal hammer to single crystals is utilized, downward resultant force of the single crystals is reduced, transferring is facilitated, human body contact can be avoided in the transferring process, the crystals are protected, damage or internal defects are avoided, and the quality of the produced crystals is improved.

Description

Technical Field

[0001] This application relates to the technical field of large-diameter germanium single crystal crystal taking, and particularly to a large-diameter germanium single crystal crystal taking device. Background Art

[0002] Germanium is one of the most commonly used and traditional infrared optical materials, which can be used in both long-wave infrared bands and mid-wave infrared bands. Compared with other infrared optical materials, the existing equipment and methods for producing germanium materials are the most mature, making the application of germanium materials the most common.

[0003] Due to the advantages of germanium such as good infrared transmission performance, high refractive index, low dispersion, non-deliquescence, high mechanical strength, and good chemical stability, germanium materials are widely used in infrared detection and thermal imaging systems. It is one of the most ideal infrared optical materials at present and is the preferred material for the optical system (8-12μm band) of thermal imagers.

[0004] At present, in order for a thermal imager to receive as much infrared radiation as possible, germanium single crystals with a larger diameter are required. With the continuous improvement of the requirements of thermal imagers in terms of spatial resolution and working distance, it is necessary to grow germanium single crystals with a larger diameter to prepare large-aperture lenses and windows, so as to meet the market demand. At present, when the germanium single crystal comes out of the furnace, due to its large diameter, it cannot be lifted to the auxiliary chamber. Generally, the germanium single crystal is first cut off from the necking part, and then the germanium single crystal is taken out of the crucible in the main chamber.

[0005] Using this method, the mass of the produced germanium single crystal can reach more than 200 kg. In the existing crystal taking process, after the crystal is extracted, it is manually cut off from the necking part. Due to the excessive gravity of the crystal, it is easy to form damage during crystal taking, affecting the crystal quality. The cut crystal is difficult to take out of the main chamber, and it is easy to collide during taking, resulting in crystal breakage or even fracture.

[0006] At the same time, the existing large-diameter germanium single crystal weighs more than 200 kg and has a smooth surface. At present, it is completely dependent on manual labor to take the germanium single crystal out of the crucible. It is difficult to safely and completely take the germanium single crystal out of the crucible by manual using the existing crystal taking device, with low operation efficiency and the germanium single crystal being easily damaged.

[0007] The prior art discloses a crystal taking manipulator mechanism of a germanium crystal growth device as disclosed in CN202021882257.1, but this device can only realize the clamping of the crystal growth furnace and cannot realize the process of safely taking the germanium crystal out of the crucible.

[0008] The information disclosed in the background art section is only intended to increase the understanding of the overall background of the present utility model and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0009] The present application provides a large-diameter germanium single crystal crystal extraction device for the above technical problems. This device can efficiently, safely, and non-destructively extract germanium crystals from the crucible, solving the problem of possible fracture of germanium single crystals that may occur during the existing crystal extraction process.

[0010] The present application provides a large-diameter germanium single crystal crystal extraction device, including: a hanging component, a sliding rod component, and a frame body;

[0011] The hanging components are arranged in pairs on both sides of the sliding rod component, and the frame body is slidably arranged on the sliding rod component; a buffer pad is laid in the frame body; the top end of the hanging component is clamped with a flange on the outer side wall of the single crystal furnace cover;

[0012] The frame body is hung under the single crystal furnace cover through the hanging component and is arranged to move along with the furnace cover.

[0013] Preferably, the hanging component includes: a buckle plate, a connecting arm, and a base; buckle plates are arranged on the opposite side walls at one end of the connecting arm; the buckle plates are clamped with the card slots on the outer side wall of the single crystal furnace cover; the other end of the connecting arm is detachably connected to the base; the base is connected to the sliding rod component.

[0014] Preferably, the sliding rod component includes: a pair of sliding rail rods; the sliding rail rods are symmetrically arranged on the two opposite long side edges of the hanging component.

[0015] Preferably, it includes: a plurality of sliders; the sliders are arranged in pairs symmetrically on the bottom surface of the frame body and are slidably connected to the sliding rod component.

[0016] Preferably, the buffer pad is a shock-absorbing foam board.

[0017] Preferably, the diameter of the frame body is larger than the diameter of the germanium single crystal.

[0018] Preferably, the self-weight of the germanium single crystal is greater than or equal to 100 kg.

[0019] Preferably, the frame body is arranged in the central area of the hanging component.

[0020] Preferably, convex blocks are protrudingly arranged on the opposite side surfaces of the buckle plate, and grooves are arranged on the outer surface of the convex blocks, and the grooves are clamped with the flanges on the outer side wall of the furnace cover.

[0021] Preferably, the hanging component includes: a handle; the handle is arranged on the outer side wall of the buckle plate.

[0022] The beneficial effects that the present application can produce include:

[0023] 1) The large-diameter germanium single crystal crystal-taking device provided by the present application. During the rotation and translation of the furnace cover, a transverse shear force will be generated, which is extremely likely to cause fractures at the thin neck where the crystal is connected to the seed crystal hammer, resulting in accidental detachment of the crystal. When using this device to provide sufficient protection for the crystal, germanium single crystals weighing more than 200 kg can be transported to the lifting platform on one side of the crystal furnace. During the process, the buffer pads laid inside the crystal-taking frame protect the crystal from damage caused by accidental detachment. At the same time, the upward lifting force generated by the motor-driven seed crystal hammer on the single crystal is utilized to reduce the resultant downward force of the single crystal, facilitating transportation. During the transportation process, human contact can be avoided, protecting the crystal from damage or the formation of internal defects, and improving the quality of the crystals obtained in production.

[0024] 2) The large-diameter germanium single crystal crystal-taking device provided by the present application. The crystal in this device is transported to an electric lifting platform vehicle and then the shearing operation is carried out. During the process of cutting the germanium single crystal, the forces on each part are uniform, which can effectively avoid damage to the germanium single crystal and ensure the crystal quality. It solves the problems of low efficiency and easy damage of large-diameter germanium single crystals when they are taken out of the furnace, reduces the labor intensity, and avoids the risk that the germanium single crystal may fall and hurt the operator and the germanium single crystal when the germanium single crystal is taken out of the furnace.

[0025] 3) The large-diameter germanium single crystal crystal-taking device provided by the present application has a simple structure, solves the problem of easy detachment of single crystals when large-diameter germanium single crystals are taken out of the furnace, can ensure the safety and integrity of single crystals, reduces the labor intensity, and avoids the risk that the germanium single crystal may fall and hurt the operator and the germanium single crystal when the germanium single crystal is taken out of the furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the crystal-taking protection device for large-diameter germanium single crystals in at least one embodiment provided by the present application;

[0027] Figure 2 Schematic diagram of the installation state of the crystal-taking protection device for large-diameter germanium single crystals in at least one embodiment provided by the present application;

[0028] Figure 3 Schematic diagram of the flow of the method for using the crystal-taking protection device for large-diameter germanium single crystals in at least one embodiment provided by the present application;

[0029] Legend:

[0030] Snap plate 11, connecting arm 12, base 13, pin shaft assembly 14, strengthening assembly 21, slide rail rod 22, frame 3, slider 31, handle 111, furnace cover 10. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. The components of the embodiments of the present utility model usually described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0033] The technical means not detailed in this application and not used to solve the technical problems of this application are set according to the common general knowledge in the art, and various ways of setting common general knowledge can be realized.

[0034] See Figures 1 to 3 , this application provides a crystal taking protection device for large-diameter germanium single crystal, including: a hanging component, a sliding rod component, and a frame 3;

[0035] The hanging components are arranged in pairs on both sides of the sliding rod component, and the frame 3 is slidably arranged on the sliding rod component; a buffer pad is laid in the frame 3; the top end of the hanging component is clamped with the flange on the outer wall of the single crystal furnace cover 10.

[0036] The frame 3 is hung under the single crystal furnace cover 10 through the hanging component and moves with the furnace cover 10.

[0037] By using this device and performing the above operations, the crystal can be comprehensively protected during the crystal taking process, and an effective transfer of a crystal weighing more than 200 kg can be achieved with the help of a seed crystal hammer. In this process, there is no need for manual operation on the germanium single crystal at close range, with high safety, and the forces on each part are evenly distributed during the cutting of the germanium single crystal, effectively avoiding damage to the germanium single crystal.

[0038] This device can be used to assist in the operation of germanium crystals with a self-weight of more than 200 kg.

[0039] In a specific embodiment, the frame 3 is arranged in the central area of the hanging component to ensure the force stability of the crystal receiving frame when the germanium single crystal drops; the hanging components are symmetrically arranged on the crystal receiving frame, and when the mass of the germanium single crystal is too large, the number of hanging components can be increased according to safety considerations.

[0040] In a specific embodiment, the hanging component includes: a buckle plate 11, a connecting arm 12, and a base 13; the buckle plate 11 is arranged on the opposite side wall at one end of the connecting arm 12; the buckle plate 11 is clamped with a clamping groove on the outer side wall of the single crystal furnace cover 10; the other end of the connecting arm 12 is detachably connected to the base 13; the base 13 is connected to the sliding rod component. By adjusting the length of the connecting arm 12, the protruding length can be adjusted according to the needs of the operating environment.

[0041] In a specific embodiment, the hanging component includes: a pin shaft component 14; mounting holes are aligned and opened at the connecting ends of the connecting arm 12 and the base 13; the pin shaft component 14 is installed in the mounting holes, and the detachable connection between the connecting arm 12 and the base 13 is realized by arranging the pin shaft component 14.

[0042] In a specific embodiment, the sliding rod component includes: paired sliding rail rods 22; the sliding rail rods 22 are symmetrically arranged on two opposite long side edges of the hanging component.

[0043] In a specific embodiment, the sliding rod component includes: a plurality of strengthening components 21; the strengthening components 21 are arranged at intervals between the sliding rail rods 22; both ends of the strengthening components 21 are vertically connected to the sliding rail rods 22 respectively, enhancing the force-bearing reliability of the sliding rail rods 22 to support the germanium crystal.

[0044] In a specific embodiment, it includes: a plurality of sliders 31; the sliders 31 are arranged in pairs and symmetrically on the bottom surface of the frame 3, and are slidably connected to the sliding rod component. With this arrangement, the position of the frame 3 on the sliding rod component can be adjusted according to the crystal receiving position. Specifically, referring to Figure 1 , a first group of sliders are symmetrically arranged on the bottom surface of the first side edge on the bottom surface of the frame 3; a second group of sliders are symmetrically arranged on the bottom surface of the second side edge on the bottom surface of the frame 3, and the first side edge and the second side edge are oppositely arranged to improve the stability when the frame 3 moves on the sliding rod component.

[0045] In a specific embodiment, the hanging component includes: a handle 111; the handle 111 is arranged on the outer side wall of the buckle plate 11. With this arrangement, it is convenient for the operator to install the device.

[0046] In a specific embodiment, the flange on the outer side wall of the furnace cover 10 is arranged on the outer side wall of the bottom opening of the furnace cover 10.

[0047] In a specific embodiment, convex blocks are protrudingly arranged on the opposite side surfaces of the buckle plate 11, and grooves are arranged on the outer surfaces of the convex blocks, and the grooves are clamped with the flanges on the outer side wall of the furnace cover 10 to realize the hanging connection of the crystal receiving frame.

[0048] In a specific embodiment, the device is made of aluminum profiles to reduce the overall mass and avoid damaging the structure of the single crystal furnace.

[0049] In a specific embodiment, the frame 3 is an open cylindrical structure with a bottom surface and no top surface. The bottom is a mesh hollow structure, and the side is a hollow mesh structure. While providing reliable support, it avoids excessive weight.

[0050] The usage method of the device includes the following steps:

[0051] 1) After the crystal growth is completed and the single crystal furnace cools down, the inside of the furnace is filled with gas to normal pressure. The secondary chamber and the furnace cover 10 of the single crystal furnace are raised, the seed crystal hammer is retracted, and the germanium single crystal is driven upward to the lower part of the furnace cover 10.

[0052] 2) Hang a crystal receiving frame that moves with the furnace cover 10 below the furnace cover 10, and lay a buffer pad inside the crystal receiving frame.

[0053] 3) The driving assembly on the single crystal furnace drives the secondary chamber and the furnace cover 10 to rotate and then translate above the electric lifting platform truck arranged on one side of the single crystal furnace.

[0054] 4) After removing the crystal receiving frame, the seed crystal hammer drives the germanium single crystal to fall onto the electric lifting platform truck, and then cuts the germanium single crystal.

[0055] Using this method to take the crystal can completely avoid manual contact with the crystal, effectively protect the crystal. After the germanium crystal's own weight and the translational and rotational forces it receives, the motor drives the single crystal to move onto the electric lifting platform truck under the protection of the crystal receiving frame through the seed crystal hammer, ensuring the safety of transportation. At the same time, it avoids impact with other objects at the bottom of the single crystal, resulting in damage to the crystal and the need to redraw. After transportation, the crystal is placed on the electric lifting platform truck and then the cutting operation is carried out. Moreover, during the process of cutting the germanium single crystal, the forces on each part are uniform, which can effectively avoid damage to the germanium single crystal. By setting the crystal receiving frame, when the seed crystal hammer accidentally falls off due to a lateral force during transportation, it can provide reliable support and protection for the crystal.

[0056] Since lateral shear forces will be generated during the rotation and translation of the furnace cover 10, it is extremely easy to break at the narrow neck where the crystal is connected to the seed crystal hammer, resulting in accidental detachment of the crystal. By hanging a crystal receiving frame that moves with the furnace cover 10 below the furnace cover 10,

[0057] In a specific embodiment, after the single crystal furnace cools down, the temperature inside the furnace is lower than 50°C. Operating at this temperature can better ensure the quality of the single crystal and reduce internal defects. It solves the problems of low efficiency and easy damage of large-diameter germanium single crystals when they are taken out of the furnace, reduces the labor intensity, and avoids the risk of germanium single crystals falling and hurting operators and germanium single crystals that may exist when germanium single crystals are taken out of the furnace.

[0058] In a specific embodiment, the buffer pad is a shock-absorbing foam board. This material is cheap, easy to obtain, and has good buffering effect.

[0059] In a specific embodiment, before the furnace cover 10 rotates, the germanium single crystal is slowly lowered to a position 1 - 2 cm above the buffer pad of the crystal receiving frame. Rotating at this height can better protect the single crystal and further avoid damage.

[0060] In a specific embodiment, when the germanium single crystal accidentally drops, the germanium single crystal falls into the crystal receiving frame provided with a buffer pad, achieving effective protection of the germanium single crystal, ensuring the crystal quality after crystal extraction, and avoiding crystal breakage or internal defect formation.

[0061] In a specific embodiment, the diameter of the crystal receiving frame is larger than the diameter of the germanium single crystal, ensuring that the germanium single crystal can smoothly enter the frame 3.

[0062] In a specific embodiment, the single crystal furnace used in this method includes: a main chamber, a sub-chamber, a furnace cover, and a seed crystal hammer; the sub-chamber is stacked above the main chamber; a furnace cover is provided on the main chamber, and the main chamber, sub-chamber, and furnace cover can all be opened separately. The seed crystal hammer lifting system includes: a driving motor, a seed crystal hammer, a steel cable, and a seed crystal; one end of the steel cable is wound and connected to the pulley at the top of the sub-chamber, and the extended length of the seed crystal hammer can be retracted as needed. The steel cable passes through the sub-chamber and the furnace cover and extends into the main chamber. A hammer body is provided at the other end of the steel cable, and a seed crystal is suspended below the hammer body and extends into the main chamber. During the process of the germanium single crystal being taken out of the furnace, it will swing with the seed crystal hammer.

[0063] Specifically, it includes the following steps:

[0064] (1) After the temperature in the single crystal furnace is lowered to below 50°C, the furnace is filled with gas to normal pressure, and the furnace cover 10 is lifted (translated without rotation), and the germanium single crystal is lifted upward to the lower part of the furnace cover 10 by the rising of the main chamber with the seed crystal hammer.

[0065] (2) A shock-absorbing foam board (not shown in the figure) is placed in the frame 3, and the crystal extraction protection device is installed at the furnace cover 10 to ensure that the buckle at the support arm of the crystal extraction protection device is tightly combined with the furnace cover 10.

[0066] (3) The seed crystal hammer is lowered to slowly lower the germanium single crystal to a position 1 - 2 cm above the shock-absorbing foam board of the frame 3.

[0067] (4) The driving component of the germanium crystal production device drives the sub-chamber and the furnace cover 10 to rotate and then translate to one side. At this time, the crystal extraction protection device moves together with the furnace cover 10. During the rotation and translation process, if the germanium single crystal falls off, it can fall into the frame 3, and the shock-absorbing foam board in the frame 3 will reduce the impact caused by the falling of the germanium single crystal, more effectively protecting the germanium single crystal and the safety of the operator.

[0068] (5) After the furnace cover 10 rotates to the other side, the furnace cover 10 is slightly lowered to facilitate the operator to remove the crystal extraction frame.

[0069] (6) Slowly lower the height of the germanium single crystal until it contacts the electric lifting platform truck. Use diagonal pliers to cut the germanium single crystal so that it is placed stably on the electric lifting platform truck. Then raise the seed crystal hammer to the lower part of the furnace cover 10 and raise the furnace cover 10 to the highest point. After transporting and contacting the electric lifting platform truck, and then lowering it to a position where the forklift can contact it, the stable transportation by the forklift can effectively improve the protection effect on the crystal.

[0070] Through the above-mentioned crystal-taking process for large-diameter germanium single crystals, the problem of taking the large-diameter germanium single crystal out of the furnace is solved. At the same time, the problem of single-crystal shedding that is likely to occur in this crystal-taking process is solved. It can ensure the safety and integrity of the single crystal, reduce the labor intensity, and avoid the risk that the germanium single crystal may fall when taking the germanium single crystal out of the furnace, thus injuring the operators, the growth equipment, and the germanium single crystal.

[0071] In this application, the large diameter means that the diameter of the crystal is greater than or equal to 300 mm.

[0072] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A large diameter germanium single crystal extraction device, characterized in that: include: Suspension assembly, slide bar assembly, frame (3); The hanging components are arranged in pairs on both sides of the slide bar component, and the frame (3) is slidably arranged on the slide bar component; a buffer pad is laid inside the frame (3); the top end of the hanging component is clamped with a flange on the outer side wall of the single crystal furnace cover (10); The frame (3) is hung below the single crystal furnace cover (10) via a hanging assembly and is arranged to move along with the furnace cover (10).

2. The large-diameter germanium single crystal extraction device according to claim 1, characterized in that: The hanging assembly comprises: a snap plate (11), a connecting arm (12), and a base (13); the snap plate (11) is arranged on a side wall opposite to one end of the connecting arm (12); the snap plate (11) is snap-connected with a slot on an outer side wall of a single crystal furnace cover (10); the other end of the connecting arm (12) is detachably connected to the base (13); and the base (13) is connected to the slide rod assembly.

3. The large diameter germanium single crystal extraction device according to claim 1, characterized in that: The slide bar assembly comprises: slide rail bars (22) arranged in pairs; the slide rail bars (22) are symmetrically arranged on two opposite long sides of the hanging assembly.

4. The large-diameter germanium single crystal extraction device according to claim 1, characterized in that: include: A plurality of sliders (31); the sliders (31) are symmetrically arranged in pairs on the bottom surface of the frame (3) and are slidably connected to the slide bar assembly.

5. The large diameter germanium single crystal extraction device according to claim 1, characterized in that: The cushion is a shock absorbing foam board.

6. The large diameter germanium single crystal extraction device according to claim 1, characterized in that: The diameter of the frame (3) is greater than the diameter of the germanium single crystal.

7. The large-diameter germanium single crystal extraction device according to claim 1, characterized in that: The weight of the germanium single crystal is greater than or equal to 100 kg.

8. The large-diameter germanium single crystal extraction device according to claim 1, characterized in that: The frame (3) is arranged in the central area of ​​the hanging assembly.

9. The large diameter germanium single crystal extraction device according to claim 2, characterized in that: A protruding block is provided on the opposite side of the snap plate (11), and a groove is provided on the outer surface of the protruding block, and the groove is snap-connected with the flange on the outer side wall of the furnace cover (10).

10. The large diameter germanium single crystal extraction device according to claim 9, characterized in that: The hanging assembly comprises: a handle (111); the handle (111) is arranged on the outer side wall of the buckle plate (11).

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