Graphite boat sticking point capable of reducing frame friction

Abstract

The utility model discloses a graphite boat clamping point capable of reducing frame friction, which comprises a fixed end and a clamping end, the fixed end is arranged on a graphite boat, the fixed end comprises a spacing surface and vertical surfaces, the spacing surface is used for spacing clamping points on two sides, the width of the spacing surface is smaller than that of the existing clamping point, and the vertical surfaces are positioned on two sides of the spacing surface and are vertical to the spacing surface; the clamping ends are located on the two sides of the fixing face, each clamping end comprises an inclined face clamping face and a fixing face, an included angle is formed between the inclined face clamping face and the vertical face, the fixing face is perpendicular to the inclined face clamping face, and the included angle is larger than the included angle of an existing clamping point. And the problem that the reject ratio of products is increased due to friction marks formed by friction easily generated between the silicon wafer and the sticking point is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cells, in particular to a graphite boat clamping point for reducing frame friction. Background Art

[0002] Setting an anti-reflection film on the surface of solar cells can reduce the reflectivity of photovoltaic cells and improve the photoelectric conversion efficiency of solar cells. The current main method is to coat silicon nitride film on the surface of silicon wafers to form an anti-reflection film on the surface of solar cells. When coating silicon nitride film on silicon wafers, a graphite boat is usually used as a carrier. The graphite boat has graphite boat clamping points. The silicon wafer is clamped on the graphite boat through the graphite boat clamping points. There is a distance between the graphite boat clamping points and the wafer, which is conducive to the graphite boat to better fix the position of the silicon wafer and reduce the occurrence of color difference caused by wafer drop.

[0003] However, the distance between the current clamping points and the graphite boat is relatively narrow, which will cause friction between the silicon wafer and the clamping points during the process of carrying the silicon wafer, resulting in friction marks on the frame, which can easily increase the defective rate of the product. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, the purpose of the utility model is to provide a graphite boat clamping point that reduces frame friction, replacing the traditional graphite boat clamping point, avoiding the friction between the silicon wafer and the clamping point, thereby forming friction marks and increasing the product defect rate.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A graphite boat clamping point for reducing frame friction, comprising:

[0008] A fixed end, which is mounted on the graphite boat, the fixed end comprising a spacing surface separating the two side clamping points and vertical surfaces located on both sides of the spacing surface and perpendicular to the spacing surface, the width of the spacing surface is 2 cm;

[0009] The clamping end is located on both sides of the fixed end, and the clamping end includes an inclined clamping surface forming an angle with the vertical surface and a fixed surface forming a second angle with the inclined clamping surface. The angle is relatively large, and the angle formed between the inclined clamping surface and the vertical surface is 53 degrees. The side wall of the fixed surface is evenly provided with multiple air circulation holes extending from the inclined clamping surface.

[0010] As a preferred solution of a graphite boat clamping point for reducing frame friction described in the utility model, the side wall of the vertical surface is provided with a connecting end, and the other side of the connecting end is connected to the inclined clamping surface.

[0011] As a preferred solution of a graphite boat clamping point for reducing frame friction described in the utility model, the intersection of the spacing surface and the vertical surface is a chamfered structure, and the intersection of the inclined clamping surface and the fixed surface is a chamfered structure.

[0012] Compared with the prior art, the utility model has the beneficial effect that the graphite boat clamping point that reduces the friction of the frame clamps the silicon wafer through the angle formed between the inclined clamping surface and the vertical surface, and increases the spacing between the silicon wafer and the vertical surface and the inclined clamping surface by reducing the width of the spacing surface and increasing the angle between the inclined clamping surface and the vertical surface, thereby avoiding full contact between the side wall of the silicon wafer and the vertical surface and the inclined clamping surface, replacing the traditional graphite boat clamping point, avoiding the problem of easy friction between the silicon wafer and the clamping point, thereby forming friction marks and increasing the product defective rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0014] Figure 1 This is a structural schematic diagram of a graphite boat clamping point for reducing frame friction in the utility model;

[0015] Figure 2 It is a side view of a graphite boat clamping point for reducing frame friction according to the utility model;

[0016] Figure 3 It is a side view of the currently existing graphite boat clamping point.

[0017] In the figure: 100, fixed end; 110, spacing surface; 120, vertical surface; 120a, connecting end; 200, snap-fit ​​end; 210, inclined snap-fit ​​surface; 220, fixed surface; 220a, air circulation hole. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0019] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0020] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] The utility model provides a graphite boat clamping point for reducing frame friction, which replaces the traditional graphite boat clamping point and avoids the problem that friction between the silicon wafer and the clamping point is easy to generate, thereby forming friction marks and increasing the product defect rate.

[0022] Figure 1-Figure 2 The structure diagram of the graphite boat clamping point for reducing frame friction of the utility model is shown. Figure 1-Figure 2 A detailed introduction is given to the graphite boat clamping points for reducing frame friction.

[0023] Example 1

[0024] refer to Figure 1-Figure 3 The utility model discloses a graphite boat clamping point for reducing frame friction, and its main body includes a fixed end 100 and a clamping end 200.

[0025] The fixed end 100 is used for fixed installation on the graphite boat and is convenient for matching the clamping end 200 to fix and clamp the silicon wafer. The fixed end 100 is installed on the graphite boat. The fixed end 100 includes a spacing surface 110 separating the clamping points on both sides and vertical surfaces 120 located on both sides of the spacing surface 110 and perpendicular to the spacing surface 110. The spacing surface 110 is used to separate the clamping points on both sides of the fixed end 100, so as to facilitate the fixing of multiple silicon wafers. The vertical surface 120 is used to cooperate with the inclined clamping surface 210 to facilitate the clamping of the silicon wafer. The width of the spacing surface 110 is 2 cm, and the width between the clamping points is 2 cm, so as to facilitate the reduction of the distance between the clamping points after increasing the angle between the vertical surface 120 and the inclined clamping surface 210, thereby avoiding a decrease in the number of silicon wafers fixed on the graphite boat.

[0026] The clamping end 200 is used to cooperate with the fixed end 100 to clamp and fix the silicon wafer. The clamping end 200 is located on both sides of the fixed end 100. The clamping end 200 includes an inclined clamping surface 210 with an angle formed between the vertical surface 120 and a fixed surface 220 with a second angle formed with the inclined clamping surface 210. The inclined clamping surface 210 is used to facilitate the angle formed after cooperating with the vertical surface 120 to fix and clamp the silicon wafer. The angle is large, and the angle is greater than the angle of the existing clamping point, which is used to increase the movement of the silicon wafer between the inclined clamping surface 210 and the vertical surface 120. Space, thereby avoiding friction marks on the side walls of the silicon wafer after full contact between the side walls of the silicon wafer and the bevel clamping surface 210 and the vertical surface 120. The angle formed between the bevel clamping surface 210 and the vertical surface 120 is 53 degrees, so that the distance between the bevel clamping surface 210 and the vertical surface 120 of the silicon wafer is larger. The side wall of the fixed surface 220 is evenly provided with a plurality of air circulation holes 220a extending from the bevel clamping surface 210, which are used to maintain the fluidity of air between the bevel clamping surface 210 and the vertical surface 120, so that the surface of the silicon wafer is more uniform when depositing the coating.

[0027] In this embodiment, the specific usage process is as follows: the silicon wafer is clamped between the bevel clamping surface 210 and the vertical surface 120, and the movable space of the silicon wafer between the bevel clamping surface 210 and the vertical surface 120 is increased by increasing the angle between the bevel clamping surface 210 and the vertical surface 120, thereby avoiding friction between the side walls of the silicon wafer and the bevel clamping surface after full contact with the bevel clamping surface 210. At the same time, by reducing the width of the spacing surface 110, it is avoided that the number of clamping points and silicon wafers that can be placed on the graphite boat after the angle is increased will be reduced, thereby reducing the work efficiency.

[0028] Example 2

[0029] On the basis of Example 1, a connecting end 120 a is provided on the side wall of the vertical surface 120 for facilitating the connection and fixation between the clamping end 200 and the fixed end 100 , and the other side of the connecting end 120 a is connected to the inclined clamping surface 210 .

[0030] In this embodiment, the intersection of the spacing surface 110 and the vertical surface 120 is a chamfered structure, and the intersection of the inclined clamping surface 210 and the fixing surface 220 is a chamfered structure, which is used to prevent the side wall of the silicon wafer from being scratched, thereby increasing the product defect rate.

[0031] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A graphite boat clamping point for reducing frame friction, characterized in that: include: A fixed end (100) is mounted on the graphite boat, the fixed end (100) comprising a spacing surface (110) separating the two side clamping points and vertical surfaces (120) located on both sides of the spacing surface (110) and perpendicular to the spacing surface (110), the width of the spacing surface (110) being 2 cm; A clamping end (200) is located on both sides of the fixed end (100), the clamping end (200) comprising an inclined clamping surface (210) forming an angle with the vertical surface (120) and a fixed surface (220) forming a second angle with the inclined clamping surface (210), the angle formed between the inclined clamping surface (210) and the vertical surface (120) is 53 degrees, and a side wall of the fixed surface (220) is evenly provided with a plurality of air circulation holes (220a) extending from the inclined clamping surface (210).

2. A graphite boat clamping point for reducing frame friction according to claim 1, characterized in that: The side wall of the vertical surface (120) is provided with a connecting end (120a), and the other side of the connecting end (120a) is connected to the inclined clamping surface (210).

3. The graphite boat clamping point for reducing frame friction according to claim 1, characterized in that: The intersection of the spacing surface (110) and the vertical surface (120) is a chamfered structure, and the intersection of the inclined clamping surface (210) and the fixing surface (220) is a chamfered structure.

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