Vertical seed crystal cleaning tool

Abstract

The utility model provides a vertical seed crystal cleaning tool, and relates to the technical field of seed crystal cleaning. The bracket is used for placing a seed crystal, can freely enter and exit from the cleaning container, and can rotate in the cleaning container; the support comprises a base used for supporting a seed crystal; one end of the stand column is connected to the base; the limiting plate is located above the base and connected to the stand column; a plurality of limiting holes matched with seed crystals are distributed in the limiting plate. The seed crystals can be supported, separated and protected through the limiting plates and the limiting holes, and collision, damage and subfissure among the seed crystals are avoided. The support can rotate in the cleaning container, so that both the seed crystal and the acid liquor move and shake, all parts of the seed crystal can be in contact with the acid liquor, the acid pickling corrosion degree of all faces of the seed crystal is consistent, and therefore the situation that due to the fact that the taper of the seed crystal is not uniform, the seed crystal and a chuck used in the seeding process are stuck is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of seed crystal cleaning, in particular to a seed crystal vertical cleaning tool. Background Art

[0002] During the process of pulling single crystal silicon rods, our company will use seed crystals for lead release. Seed crystals are very critical auxiliary materials. After the seed crystals are pulled out, they need to be polished and pickled before they can be used. Pickling is the last process of seed crystals. Pickling will corrode the metal and oxide layer produced during the process of pulling out and polishing the seed crystals, ensuring purity and preventing impurities from entering the crystal pulling process (single crystal silicon rod pulling process).

[0003] When pickling the seed crystals, a certain proportion and appropriate amount of hydrofluoric acid and nitric acid will be added to the acid-resistant and alkali-resistant material tank, and then 12 seed crystals to be pickled will be placed in the acid-resistant and alkali-resistant material tank in a lying or flat manner at a time and soaked for about 8-10 minutes. During the soaking process, the seed crystals need to be constantly turned over using acid-resistant tweezers until the cleaning is completed.

[0004] However, the current seed crystal pickling process has the following defects:

[0005] 1. When pickling, lying or flat seed crystals are prone to collision, damage, and hidden cracks.

[0006] 2. When the operator turns the seed crystal over, it is impossible to ensure that each surface is corroded or the degree of corrosion is different (the seed crystal is not completely immersed in the acid, or the seed crystal is in contact with a large area of ​​the bottom of the material box), which leads to inconsistent tapers at different locations on the taper surface of the seed crystal. Utility Model Content

[0007] In view of the above situation, the utility model provides a seed crystal vertical cleaning tool, which aims to solve the problem of different degrees of collision, damage and corrosion during the seed crystal pickling process.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] The utility model provides a seed crystal vertical cleaning tool, which comprises:

[0010] Cleaning containers;

[0011] A support for placing seed crystals, which can freely enter and exit the cleaning container and can rotate in the cleaning container;

[0012] The support comprises:

[0013] A base, used to support the seed crystal;

[0014] A column, one end of which is connected to the base;

[0015] A limiting plate is located above the base and connected to the column; a plurality of limiting holes matching the seed crystals are distributed on the limiting plate.

[0016] In some embodiments of the present invention, the number of the limiting holes is greater than or equal to 16.

[0017] In some embodiments of the present invention, at least two of the limiting plates are spaced apart along the axial direction of the column.

[0018] In some embodiments of the present invention, a container cover is further included; the column can penetrate the container cover.

[0019] In some embodiments of the present invention, the column is connected to a rotating handle.

[0020] In some embodiments of the present invention, the cleaning container is in a barrel shape.

[0021] In some embodiments of the present invention, a support column is disposed on the base, and the top of the support column is used to contact the bottom end of the seed crystal.

[0022] In some embodiments of the present invention, a positioning hole is formed on the base, and the support column is interference fit with the positioning hole.

[0023] In some embodiments of the present invention, an anti-dropping protrusion is provided on the upper side wall of the support column.

[0024] In some embodiments of the present invention, the top of the support column is conical or truncated cone-shaped.

[0025] The embodiments of the present invention have at least the following advantages or beneficial effects:

[0026] 1. The limiting plates and limiting holes can support, separate and protect the seed crystals, thus preventing the seed crystals from colliding, being damaged or having hidden cracks.

[0027] 2. The bracket can rotate in the cleaning container, causing the seed crystal and the acid to move and shake, which is beneficial for all parts of the seed crystal to contact with the acid. The degree of pickling corrosion on all surfaces of the seed crystal is consistent, thereby avoiding the seed crystal from getting stuck due to uneven taper and the chuck used in the seeding process (used to drive the seed crystal up and down) (assembly problem).

[0028] 3. The bracket can not only place the seed crystal during the pickling process, but also place and transport the seed crystal during the cleaning, air drying, inspection and other processes after pickling.

[0029] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 It is a structural schematic diagram of a seed crystal vertical cleaning tool;

[0032] Figure 2 for Figure 1 Schematic diagram of the internal structure;

[0033] Figure 3 is a schematic diagram of the structure of the bracket;

[0034] Figure 4 for Figure 2 A partial enlarged view of position A in the middle;

[0035] Figure 5 A schematic diagram of the structure of the support column.

[0036] Icons: 1-cleaning container, 2-container cover, 21-avoidance hole, 3-bracket, 31-base, 311-positioning hole, 32-column, 33-limiting plate, 331-limiting hole, 34-support column, 341-anti-slip bump, 35-rotating handle, 4-seed crystal, 51-initial liquid level of acid, 52-liquid level after the acid is placed in the seed crystal. DETAILED DESCRIPTION

[0037] In the following, only some exemplary embodiments are briefly described. As those skilled in the art can appreciate, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present invention.

[0038] In the description of the embodiments of the present invention, it should be understood that the terms "center", "up", "down", "top", "bottom", "inside", "outside", "axial", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0039] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0040] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0041] Example

[0042] See also Figure 1 to Figure 5 This embodiment provides a seed crystal vertical cleaning tool, including a cleaning container 1, a container cover 2 and a bracket 3.

[0043] The cleaning container 1 provides a space for the seed crystal 4 to contact with the acid solution. The acid solution includes hydrofluoric acid and nitric acid mixed in a certain proportion.

[0044] In a specific implementation scenario, the cleaning container 1 is in a barrel shape.

[0045] The container cover 2 is detachably connected to the top of the cleaning container 1 to play a protective role. The container cover 2 is provided with an avoidance hole 21.

[0046] In a specific implementation scenario, the container cover 2 is directly covered on the top of the cleaning container 1 .

[0047] The support 3 is movably arranged to place the seed crystal 4 ; the support 3 can freely enter and exit the cleaning container 1 , and can rotate in the cleaning container 1 ; the support 3 includes a base 31 , a column 32 and a limit plate 33 .

[0048] The base 31 is used to support the seed crystal 4 .

[0049] In a specific implementation scenario, a positioning hole 311 is opened on the base 31, and a support column 34 is inserted into the positioning hole 311 from top to bottom, and the support column 34 is interference fit with the positioning hole 311; the upper side wall of the support column 34 has an anti-slip bump 341, and the top is conical or truncated cone-shaped, and the top of the support column 34 is used to contact the bottom end of the seed crystal 4 to support the seed crystal 4.

[0050] The lower end of the column 32 is fixed at the center of the base 31 , and the upper end can extend to the outside of the container cover 2 after passing through the avoidance hole 21 and is detachably connected to a rotating handle 35 .

[0051] In a specific implementation scenario, the rotating handle 35 is in the shape of a rod, and the rotating handle 35 is laterally inserted into the upper end of the column 32 .

[0052] The limiting plate 33 is located above the base 31 and fixed to the column 32. The limiting plate 33 is evenly distributed with 16 limiting holes 331 that match the seed crystals 4. The limiting plate 33 and the limiting holes 331 can support, separate and protect the seed crystals 4, and prevent the seed crystals 4 from colliding, breaking or cracking with each other.

[0053] In other embodiments, the number of upper limit holes 331 on the limiting plate 33 can be adjusted as needed. For example, when the limiting plate 33 and the cleaning container 1 are of appropriate sizes, the number of upper limit holes 331 on the limiting plate 33 can also be greater than 16.

[0054] The advantage of the number of upper limit holes 331 on the limit plate 33 being greater than or equal to 16 is that a larger number of seed crystals 4 can be pickled at a time, and a smaller amount of acid is used (after a larger number of seed crystals 4 are placed in the acid solution, the acid solution rises a larger amount, which is conducive to the acid solution completely immersing the seed crystals 4).

[0055] In a specific implementation scenario, two limit plates 33 are arranged parallel to and spaced apart from each other along the axis of the column 32, so that the seed crystals 4 can be better supported, separated and protected to prevent collision, damage and hidden cracks between the seed crystals 4. Of course, the number of limit plates 33 can also be appropriately adjusted according to the length of the seed crystal 4.

[0056] When the seed crystal vertical cleaning tool is used to clean the seed crystal 4, the following steps are included:

[0057] Step 1: Prepare a vertical seed crystal cleaning tool;

[0058] Step 2: Introduce acid solution into the cleaning container 1 to the initial liquid level mark;

[0059] Step 3, pickling: the lower end of the seed crystal 4 to be cleaned is placed from top to bottom through the limiting hole 331 of the limiting plate 33 on the supporting column 34 of the base 31. After 16 seed crystals 4 are placed, the seed crystal 4 is placed in the cleaning container 1 with the help of the rotating handle 35, so that the seed crystal 4 is completely immersed in the acid solution, and the seed crystal 4 is rotated left and right with the help of the rotating handle 35, so that all parts of the seed crystal 4 are in contact with the acid solution (when the seed crystal 4 is rotated, the seed crystal 4 and the acid solution are moved, which is conducive to making all parts of the seed crystal 4 contact with the acid solution), and the impurities and defects on the surface of the seed crystal 4 are removed by using the corrosiveness of the acid solution;

[0060] The pickling time is 8 to 10 minutes. The pickling time can be adjusted according to the acid concentration.

[0061] Step 4, cleaning: After the pickling is completed, the support 3 and the seed crystal 4 are taken out from the cleaning container 1 to the external water tank by means of the rotating handle 35, and the acid liquid and corrosion residues remaining on the surface of the seed crystal 4 are cleaned by rinsing with pure water.

[0062] Step 5: Air drying: After cleaning, the seed crystal 4 can be suspended by the bracket 3 to air dry the seed crystal 4.

[0063] Step 6: Inspection: After air drying, the seed crystal 4 is transferred to a subsequent workstation using the support 3 for subsequent appearance and size inspection of the seed crystal 4.

[0064] In combination with the above content, the seed crystal vertical cleaning tool has at least the following beneficial effects:

[0065] 1. The limiting plates 33 and the limiting holes 331 can support, separate and protect the seed crystals 4, thereby preventing the seed crystals 4 from colliding, being damaged or having hidden cracks.

[0066] Second, the bracket 3 can rotate in the cleaning container 1, so that the seed crystal 4 and the acid solution move and shake, which is conducive to making all parts of the seed crystal 4 contact with the acid solution, and the degree of pickling and corrosion of each surface of the seed crystal 4 is consistent, thereby avoiding the seed crystal 4 from getting stuck due to uneven taper and the chuck used in the seeding process (used to drive the seed crystal 4 to rise and fall) (assembly problem).

[0067] 3. 16 seed crystals 4 can be pickled at one time, which is more efficient. In addition, increasing the number of seed crystals 4 pickled at a time is conducive to reducing the amount of acid used (after a large number of seed crystals 4 are placed in the acid solution, the acid solution rises a large amount, which is conducive to the acid solution completely immersing the seed crystals 4).

[0068] Fourth, the support 3 can not only place the seed crystal 4 during the pickling process, but also place and transport the seed crystal 4 during the cleaning, air drying, inspection and other processes after the pickling.

[0069] 5. The top of the support column 34 is conical or truncated cone-shaped, and the contact area between the top of the support column 34 and the bottom of the seed crystal 4 is small, which is conducive to making the degree of pickling and corrosion of each surface of the seed crystal 4 consistent.

[0070] Sixth, by providing a detachable rotating handle 35, it is convenient to disassemble and assemble the container cover 2, and to take, place, rotate, and other operations of the bracket 3.

[0071] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. In the absence of conflicts, the embodiments of the present application and the features in the embodiments may be combined with each other at will. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A seed crystal vertical cleaning tool, characterized in that: include: Cleaning containers; A support for placing seed crystals, which can freely enter and exit the cleaning container and can rotate in the cleaning container; The support comprises: A base, used to support the seed crystal; A column, one end of which is connected to the base; A limiting plate is located above the base and connected to the column; a plurality of limiting holes matching the seed crystals are distributed on the limiting plate.

2. The seed crystal vertical cleaning tool according to claim 1, characterized in that: The number of the limiting holes is greater than or equal to 16.

3. The seed crystal vertical cleaning tool according to claim 1, characterized in that: At least two of the limiting plates are arranged at intervals along the axial direction of the column.

4. The seed crystal vertical cleaning tool according to claim 1, characterized in that: Also included is a container cover; the column can penetrate through the container cover.

5. The seed crystal vertical cleaning tool according to claim 1, characterized in that: The column is connected with a rotating handle.

6. The seed crystal vertical cleaning tool according to claim 1, characterized in that: The cleaning container is in a barrel shape.

7. The seed crystal vertical cleaning tool according to any one of claims 1 to 6, characterized in that: A support column is arranged on the base, and the top of the support column is used to contact the bottom end of the seed crystal.

8. The seed crystal vertical cleaning tool according to claim 7, characterized in that: The base is provided with a positioning hole, and the support column is interference-fitted with the positioning hole.

9. The seed crystal vertical cleaning tool according to claim 8, characterized in that: An anti-dropping protrusion is provided on the upper side wall of the support column.

10. The seed crystal vertical cleaning tool according to claim 7, characterized in that: The top of the support column is conical or truncated cone-shaped.

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