Silicon material cleaning basket

Abstract

The utility model relates to the field of tools for monocrystalline silicon preparation, and provides a silicon material cleaning basket, which comprises a basket body comprising a bottom wall and three side walls connected with the bottom wall, the bottom wall is provided with four edges, and three edges are respectively connected with the three side walls; the three side walls comprise two operation side walls which are oppositely arranged, and each operation side wall is provided with a handle; and a plurality of water leakage holes are distributed on the bottom wall. The silicon material cleaning basket can be used for cleaning silicon materials, compared with manual silicon material hand washing, the silicon material cleaning basket can greatly improve the cleaning efficiency, and the situation that workers are injured and consumables are increased due to the fact that latex gloves / anti-cutting gloves of the workers are prone to being broken due to direct manual material taking is avoided; the silicon material is prevented from being directly contacted with human sweat grease and other organic matters to form pollution.

Description

Technical Field

[0001] The utility model relates to the field of tools for preparing single crystal silicon, and in particular to a silicon material cleaning basket. Background Art

[0002] Recycled materials account for about 44% of the raw materials in crystal pulling production. The cleanliness and purity of recycled materials greatly affect the minority carrier lifetime.

[0003] In the process of recycling material treatment, cleaning is the most important link; cleaning, crushing and process control determine the cleanliness of the recycling material; silicon materials need to be pretreated before cleaning, and the cleanliness and treatment method of pretreatment largely determine the effectiveness of subsequent liquid cleaning;

[0004] At present, the pre-cleaning cleaning method of silicon materials is usually to put the silicon materials into a large frame and then clean them manually. There are many types of recycled materials with different shapes. Small pieces of materials are easily produced during the cleaning process. Each batch produces small pieces of materials, resulting in a high proportion of small pieces of materials; however, there are some problems in the cleaning process of small pieces of materials. First, the cleaning efficiency is low and requires a lot of manual operation. Secondly, the cleaning effect is not good and it is easy to cause silicon damage. Therefore, it is necessary to design a new type of loading tooling to improve the cleaning efficiency and effect and make high-cleanliness recycled materials.

[0005] The existing cleaning method is manual cleaning. The silicon materials (edges, heads and tails, reverse cuts, polycrystalline, etc.) with through cracks and non-through cracks must be knocked open for cleaning. After knocking open, a large number of small pieces of materials are cleaned and they must be manually held and rinsed before being put into baskets. The process efficiency is extremely low. Small pieces of materials are very easy to flow into the sewer when collected, increasing silicon loss and the processing procedures for dropped materials. Direct manual handling of materials can easily lead to the rupture of personnel's latex gloves / anti-cut gloves, causing injuries to personnel and increased consumables. Silicon materials are in direct contact with organic matter such as human sweat and oil, causing pollution.

[0006] The existing cleaning method requires high skills of personnel, and the loss of silicon materials and consumables is large, which causes pollution. For example, acid cleaning cannot effectively remove it. This drawback brings pollution to the high-cleanliness silicon material circulation process, thereby reducing the minority carrier life value. The average minority carrier life value of the furnace is about 7500μs, which is about 500μs lower than other types of feeding. There is room for improvement and optimization. In order to ensure that the minority carrier life value can be better, improve the quality of wafers, increase market share and reduce the loss costs such as minority carrier reverse cutting, optimization and improvement are needed.

[0007] In view of this, this application is hereby filed. Utility Model Content

[0008] The utility model aims to provide a silicon material cleaning basket, aiming to improve at least one problem mentioned in the background technology.

[0009] The embodiment of the utility model is achieved as follows:

[0010] In a first aspect, the utility model provides a silicon material cleaning basket, comprising a basket body, which comprises a bottom wall and three side walls connected to the bottom wall;

[0011] The bottom wall has four edges, three of which are connected to the three side walls respectively;

[0012] The three side walls include two operating side walls that are arranged opposite to each other, and each operating side wall is provided with a handle;

[0013] A plurality of water leakage holes are distributed on the bottom wall.

[0014] In an optional embodiment, each side wall is also provided with a plurality of water leakage holes;

[0015] A plurality of water leakage holes arranged on each side wall are distributed at the lower part of the side wall.

[0016] In an optional embodiment, the three side walls include two oppositely disposed operating side walls and one blocking side wall, two opposite edges of the blocking side wall are respectively connected to the two operating side walls, and the bottom edge of the blocking side wall is connected to the bottom wall;

[0017] Each operating side wall is in the shape of a triangle and has three edges, two of the three edges are respectively connected to the bottom wall and the blocking side wall, and the other edge is an inclined edge.

[0018] In an optional embodiment, the bottom wall is connected to the blocking side wall via a curved surface connecting portion.

[0019] In an alternative embodiment, the handle is disposed in the middle of the inclined edge.

[0020] In an optional embodiment, the handle is a non-slip handle, and a rubber sleeve is provided on the outside of the handle.

[0021] In an optional embodiment, the diameter of each water leakage hole is 3-8 mm.

[0022] In an optional embodiment, the diameter of each water leakage hole is 5 mm.

[0023] In an optional embodiment, the distribution density of the water leakage holes is 80 to 120 per dm 2 .

[0024] In an optional embodiment, the basket is a polytetrafluoroethylene basket.

[0025] The beneficial effects of the embodiments of the utility model are:

[0026] When using the silicon material cleaning basket provided by the utility model, the staff holds a handle in each hand and adjusts the angle of the basket body so that the silicon material enters the basket body from the end without the side wall. After cleaning in the basket body, the liquid leaks out from the water leakage hole. The cleaning basket can be used to clean silicon materials. Compared with manual hand washing of silicon materials, using the cleaning basket to clean silicon materials can greatly improve the cleaning efficiency, avoid the possibility of latex gloves / anti-cut gloves being broken when people directly take the materials, thereby causing injuries to people and increasing consumables; and avoid direct contact of silicon materials with organic matter such as human sweat and oil to form pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the structure of a silicon material cleaning basket provided by an embodiment of the utility model at a first viewing angle;

[0029] Figure 2 This is a schematic structural diagram of a silicon material cleaning basket provided in an embodiment of the utility model at a second viewing angle.

[0030] Icons: 100-silicon material cleaning basket; 110-basket body; 111-bottom wall; 112-operating side wall; 113-blocking side wall; 115-leakage hole; 116-arc connection part; 120-handle. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown 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 invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply 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 present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] like Figure 1 and Figure 2 As shown, the embodiment of the present application provides a silicon material cleaning basket 100, including a basket body 110, which includes a bottom wall 111 and three side walls connected to the bottom wall 111;

[0038] The bottom wall 111 has four edges, three of which are connected to the three side walls respectively;

[0039] The three side walls include two operating side walls 112 that are arranged opposite to each other, and each operating side wall 112 is provided with a handle 120;

[0040] A plurality of water leakage holes 115 are distributed on the bottom wall 111 .

[0041] When using the silicon material cleaning basket 100 provided by the embodiment of the utility model, the staff holds a handle 120 in each hand, adjusts the angle of the basket body 110, and allows the silicon material to enter the basket body 110 from the end without the side wall. After cleaning in the basket body 110, the liquid leaks out from the water leakage hole 115. The cleaning basket can be used to clean silicon materials. Compared with manual hand washing of silicon materials, using the cleaning basket to clean silicon materials can greatly improve the cleaning efficiency, avoid the possibility of latex gloves / anti-cut gloves being broken when people directly take the materials, thereby causing injuries to people and increasing consumables; and avoid direct contact of silicon materials with organic matter such as human sweat and oil to form pollution.

[0042] Optionally, in order to improve the cleaning and water leakage efficiency, a plurality of water leakage holes 115 are also provided on each side wall.

[0043] The hole design on three sides and the bottom reduces water flow resistance during cleaning, which is beneficial to the purification and cleaning process; the material is durable and practical.

[0044] Optionally, in order to ensure the mechanical properties of the cleaning basket, considering that the silicon material is mainly concentrated in the lower part of the basket body 110 during the cleaning process, the multiple leakage holes 115 set on each side wall are distributed in the lower part of the side wall.

[0045] Optionally, the three side walls include two oppositely disposed operating side walls 112 and one blocking side wall 113, two opposite edges of the blocking side wall 113 are respectively connected to the two operating side walls 112, and the bottom edge of the blocking side wall 113 is connected to the bottom wall 111;

[0046] Each operating side wall 112 is in the shape of a triangle and has three edges, two of which are respectively connected to the bottom wall 111 and the blocking side wall 113 , and the other edge is an inclined edge.

[0047] The specific configuration of the side wall and the bottom wall 111, that is, the basket body 110 is designed to be shovel-shaped, such a shape makes the feeding end of the basket body 110 small in size, makes the operation simpler, and collects the block materials at the bottom of the washing table faster.

[0048] Furthermore, the bottom wall 111 is connected to the blocking side wall 113 via a curved surface connecting portion 116 .

[0049] The silicon material enters into the basket body 110 through the end opposite to the arc surface connection part 116 without the side wall. The design of the arc surface connection part 116 can well alleviate the impact of the silicon material and reduce the wear rate.

[0050] Optionally, the handle 120 is disposed in the middle of the inclined edge.

[0051] Optionally, the handle 120 is an anti-slip handle 120 , and a rubber sleeve is provided on the outside of the handle 120 .

[0052] The setting of the rubber sleeve can improve the grip comfort and anti-slip performance.

[0053] In addition, in some embodiments, the inner side of the handle 120 may have a groove structure matching human fingers, which conforms to ergonomic principles, so that the user can hold and operate the washing basket more comfortably.

[0054] Optionally, the diameter of each water leakage hole 115 is 3-8 mm.

[0055] Furthermore, the diameter of each water leakage hole 115 is 5 mm.

[0056] According to the proportion of the size of the cleaned silicon material required by the formula, a higher proportion of silicon material <5mm will seriously affect the break rate and equal break rate of the crystal pulling stage, while a lower proportion will lead to a lower utilization rate of the recycled material and increase production costs. After evaluating multiple diameter apertures such as 2mm, 3mm, 5mm, 8mm, and 10mm, the 5mm aperture design is optimized for purification, which is best for reflecting and reducing the cost of silicon material at the crystal pulling end, and is better than the <3mm and >8mm ranges. The purification effect of the aperture <3mm is not obvious, and the aperture >8mm will cause excessive waste of silicon material. Therefore, it is better to set the aperture of the leakage hole 115 to 3-8mm, and the aperture is 5mm.

[0057] Optionally, to ensure that the basket 110 has sufficient strength and a suitable cleaning rate, the distribution density of the water leakage holes 115 is 80 to 120 per dm. 2 .

[0058] Optionally, the basket body 110 is a polytetrafluoroethylene basket body 110 .

[0059] Because the cleaning liquid contacts strong acid and alkali, acid and alkali resistant materials must be selected at the same time; the silicon material cleaning process must avoid contact with metal, and metal contamination is strictly prohibited. Polytetrafluoroethylene has good corrosion resistance, wear resistance, and high temperature resistance, so choosing polytetrafluoroethylene basket 110 can ensure the cleaning quality and performance.

[0060] On-site use steps:

[0061] 1. Use a cleaning basket to scoop out the remaining material from each batch of manual cleaning materials;

[0062] 2. The operator holds the handle 120 to operate;

[0063] 3. After loading the materials, rinse and shake them up and down;

[0064] 4. Pour the material into the prepared basket after visually checking that it is clean and free of impurities;

[0065] 5. Normally pickling → rinsing → drying;

[0066] 6. Normal inspection and packaging circulation;

[0067] 7. The recycled materials are put into the furnace according to the formula.

[0068] In summary, the silicon material cleaning basket provided by the embodiment of the utility model utilizes tooling to replace manual gloves to complete the cleaning and transfer of small pieces of material, which is simple, convenient and easy to operate, and can avoid various losses and pollution caused by manual cleaning of small pieces of material at the current stage; including reducing silicon loss and auxiliary consumables loss, improving cleaning efficiency and effect, reducing manual operation intensity, etc., and its specific advantages are as follows:

[0069] ① The average life span of minority carriers is increased by 360μs, and the first rod can reach 7860μs;

[0070] ②Reasonable structure and easy to use;

[0071] ③ The material selection is appropriate and can withstand the influence of various factors during the cleaning process;

[0072] ④The size design is suitable to adapt to silicon materials of different specifications;

[0073] ⑤The rinsing effect is good and can remove impurities and dirt on the surface of the silicon material;

[0074] ⑥ Improved cleaning efficiency and reduced manual operation intensity;

[0075] ⑦ Avoid direct contact between gloves and silicon materials, reduce damage to gloves, and avoid organic contamination of silicon materials;

[0076] ⑧ Suitable for cleaning silicon materials in large-scale production processes.

[0077] 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 have various modifications and variations. 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 silicon material cleaning basket, characterized in that: It comprises a basket body, which comprises a bottom wall and three side walls connected to the bottom wall; The bottom wall has four edges, three of which are connected to the three side walls respectively; The three side walls include two operating side walls that are arranged opposite to each other, and each of the operating side walls is provided with a handle; A plurality of water leakage holes are distributed on the bottom wall.

2. The silicon material cleaning basket according to claim 1, characterized in that: Each of the side walls is also provided with a plurality of water leakage holes; The multiple water leakage holes arranged on each of the side walls are distributed at the lower part of the side wall.

3. The silicon material cleaning basket according to claim 1, characterized in that: The three side walls include two oppositely arranged operating side walls and one blocking side wall, two opposite edges of the blocking side wall are respectively connected to the two operating side walls, and the bottom edge of the blocking side wall is connected to the bottom wall; Each of the operating side walls is in the shape of a triangle and has three edges, two of which are respectively connected to the bottom wall and the blocking side wall, and the other edge is an inclined edge.

4. The silicon material cleaning basket according to claim 3, characterized in that: The bottom wall is connected to the blocking side wall via a curved surface connecting portion.

5. The silicon material cleaning basket according to claim 3, characterized in that: The handle is arranged at the middle of the inclined edge.

6. The silicon material cleaning basket according to claim 1, characterized in that: The handle is an anti-slip handle, and a rubber sleeve is provided on the outside of the handle.

7. The silicon material cleaning basket according to claim 1, characterized in that: The diameter of each water leakage hole is 3-8 mm.

8. The silicon material cleaning basket according to claim 7, characterized in that: The diameter of each water leakage hole is 5mm.

9. The silicon material cleaning basket according to claim 1, characterized in that: The distribution density of the water leakage holes is 80 to 120 per dm 2 .

10. The silicon material cleaning basket according to claim 1, characterized in that: The basket body is a polytetrafluoroethylene basket body.

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