Seed crystal clamp

Abstract

The utility model belongs to the technical field of crystal growth, and particularly relates to a seed crystal clamp, which comprises a graphite clamping groove, a seed crystal clamping groove and a seed crystal clamping groove, the lower end part of the connecting rod is coaxially connected with the graphite clamping groove; the taper matching body is coaxially connected with the upper end part of the connecting rod; wherein a limiting assembly is arranged on the side wall of the graphite clamping groove to limit the seed crystal in the seed crystal inner hole, and the seed crystal clamp extends into the seed crystal inner hole to limit the seed crystal, so that the stability of the seed crystal is improved; and the adhesion plate is arranged, so that the seed crystal and the adhesion plate are connected through an adhesive, and the seed crystal is convenient to separate after growing.

Description

Technical Field

[0001] The utility model belongs to the technical field of crystal growth, and particularly relates to a seed crystal fixture. Background Art

[0002] In the technology of growing silicon carbide crystals by the liquid phase method, the used seed crystal is a 4-inch or 6-inch circular seed crystal, and the fixing method is generally to bond it with a high-temperature resistant and fast adhesive to a graphite seed crystal holder of corresponding size.

[0003] However, during the process of growing with a small seed crystal, since the contact surface of the seed crystal is very small, only using the adhesive method cannot stably fix the seed crystal.

[0004] Therefore, how to solve the problem that only using the adhesive method cannot stably fix the small seed crystal is an urgent problem to be solved by those skilled in the art.

[0005] It should be noted that the above information disclosed in this background art part is only used to understand the background art of the concept of this application. Therefore, the above description is not considered as information of the prior art. Summary of the Utility Model

[0006] The embodiments of the present disclosure at least provide a seed crystal fixture.

[0007] This embodiment discloses a seed crystal fixture, which includes: a graphite card slot, with a seed crystal inner hole opened on its lower surface; a connecting rod, the lower end of which is coaxially connected to the graphite card slot; and a taper fit body, coaxially connected to the upper end of the connecting rod; wherein a limiting component is arranged on the side wall of the graphite card slot to limit the seed crystal in the seed crystal inner hole.

[0008] In one of the embodiments, the limiting component includes: a plurality of through holes and a plurality of set screws; wherein the through holes are opened on the side wall of the graphite card slot and communicate with the seed crystal inner hole; each of the set screws is respectively arranged in the corresponding through hole and is threadedly connected with the through hole, and presses against the seed crystal in the seed crystal inner hole by rotation.

[0009] In one of the embodiments, the through holes are uniformly distributed along the circumferential direction of the graphite card slot.

[0010] In one of the embodiments, the limiting component includes: at least one pin slot and at least one through pin; the extending direction of the pin slot is perpendicular to the central axis of the connecting rod, and the pin slot passes through the seed crystal inner hole; the through pin is inserted into the pin slot.

[0011] In one of the embodiments, a through groove is opened on the side wall of the seed crystal; the groove is adapted to the pin slot.

[0012] In one embodiment, two pin slots are adopted, and two through pins are adopted; the two pin slots are symmetrically arranged about the center axis of the connecting rod.

[0013] In one embodiment, an adhesion plate is slidably arranged in the inner hole of the seed crystal; the seed crystal is connected to the adhesion plate through an adhesive.

[0014] In one embodiment, a through connection hole is formed in the top surface of the graphite card slot; the connection hole communicates with the inner hole of the seed crystal.

[0015] In one embodiment, a threaded hole is formed in the upper surface of the adhesion plate; the adhesion plate is connected to the graphite card slot through a bolt.

[0016] In one embodiment, the inner hole of the seed crystal includes: a hexagonal inner hole, a circular inner hole, a square inner hole, or an inner hole of other shapes.

[0017] The beneficial effect of the present utility model is that the seed crystal fixture limits the seed crystal by extending the limiting component into the inner hole of the seed crystal, thereby improving the stability of the seed crystal; and by arranging the adhesion plate, the seed crystal and the adhesion plate are connected through an adhesive, making it convenient to separate after the growth of the seed crystal is completed.

[0018] Other features and advantages of the present utility model will be described in the following specification, and part of them will become obvious from the specification, or be understood by implementing the present utility model. The objectives and other advantages of the present utility model are achieved and obtained by the structures specifically pointed out in the specification, claims, and drawings.

[0019] To make the above objectives, features, and advantages of the present utility model more obvious and understandable, specific preferred embodiments are hereby given, and in conjunction with the accompanying drawings, the following detailed description is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic structural diagram of a seed crystal fixture provided by an embodiment of the present disclosure;

[0022] Figure 2 Bottom view of a graphite card slot with a hexagonal inner hole provided by an embodiment of the present disclosure;

[0023] Figure 3An upward view of a graphite card slot with a circular inner hole provided by an embodiment of the present disclosure;

[0024] Figure 4 An upward view of a graphite card slot with a square inner hole when using a setscrew provided by an embodiment of the present disclosure;

[0025] Figure 5 An upward view of a graphite card slot with a square inner hole when using a dowel pin provided by an embodiment of the present disclosure;

[0026] Figure 6 A square seed crystal when using a dowel pin provided by an embodiment of the present disclosure;

[0027] Figure 7 A cross-sectional view of a graphite card slot with an adhesion plate provided by an embodiment of the present disclosure;

[0028] Figure 8 A schematic diagram of the connection structure of an adhesion plate provided by an embodiment of the present disclosure.

[0029] In the figure:

[0030] Graphite card slot 1, seed crystal inner hole 11, hexagonal inner hole 111, circular inner hole 112, square inner hole 113, connection hole 12;

[0031] Connecting rod 2;

[0032] Taper fit body 3;

[0033] Limit component 4, through hole 41, setscrew 42, pin slot 43, dowel pin 44;

[0034] Seed crystal 5, groove 51;

[0035] Adhesion plate 6, threaded hole 61, bolt 62. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0038] The following will describe in detail some embodiments of the present utility model in conjunction with the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other. In addition, in the drawings, in order to effectively describe the technical content, the thickness of the components can be exaggerated or reduced.

[0039] As Figure 1 shown, this embodiment discloses a seed crystal fixture, which includes: a graphite slot 1, with a seed crystal inner hole 11 opened on its lower surface; a connecting rod 2, whose lower end is coaxially connected to the graphite slot 1; and a taper fitting 3, coaxially connected to the upper end of the connecting rod 2; wherein a limiting component 4 is arranged on the side wall of the graphite slot 1 to limit the seed crystal 5 in the seed crystal inner hole 11.

[0040] Specifically, the graphite slot 1 is threadedly connected to the lower end of the connecting rod 2, the taper fitting 3 is threadedly connected to the upper end of the connecting rod 2, and the graphite slot 1, the connecting rod 2, and the taper fitting 3 are coaxially arranged; optionally, external threads are opened at both ends of the connecting rod 2, and mating internal threaded holes are opened on the upper end surface of the graphite slot 1 and the lower end surface of the taper fitting 3, and the connection is realized through the adaptation of the internal and external threads.

[0041] During the assembly process, the seed crystal 5 is embedded in the seed crystal inner hole 11, and at the same time, a high-temperature resistant and fast adhesive is used for bonding between the contact surfaces of the seed crystal 5 and the seed crystal inner hole 11. The specific bonding position is the end surface of the seed crystal 5 and the bottom of the seed crystal inner hole 11; in order to improve the stability of the seed crystal 5, the limiting component 4 is further arranged to limit the seed crystal 5; finally, the taper fitting 3 of the seed crystal fixture is connected to the transmission shaft that controls the movement of the seed crystal 5 by the machine. Optionally, the nested nut is passed through one end of the seed crystal 5 and moved upward until the inner step of the nested nut contacts and restricts the side step of the taper fitting 3. The taper fitting 3 is nested and coupled with the inner hole of the transmission shaft. The nested nut is connected and fixed to the bottom external thread of the transmission shaft through the internal thread. Among them, the connection method between the taper fitting 3, the nested nut, and the transmission shaft is the prior art, and this embodiment does not improve it.

[0042] As Figures 2 to 4 shown, in some embodiments, the seed crystal inner hole 11 includes: a hexagonal inner hole 111 or a circular inner hole 112 or a square inner hole 113 or inner holes of other shapes.

[0043] In this embodiment, the shape of the seed crystal inner hole 11 can be selected according to the use scenario, and its size only needs to be adapted to the seed crystal 5.

[0044] In one application scenario, such as Figure 4As shown, the limiting component 4 includes: a plurality of through holes 41 and a plurality of setscrews 42; wherein the through holes 41 are formed in the side wall of the graphite card slot 1 and communicate with the seed crystal inner hole 11; each of the setscrews 42 is respectively arranged in the corresponding through hole 41, threadedly connected to the through hole 41, and abuts against the seed crystal 5 in the seed crystal inner hole 11 by rotation.

[0045] In this embodiment, taking the square inner hole 113 as an example, the through hole 41 communicates with the square inner hole 113, and the through hole 41 is an internal threaded hole. By screwing the external threaded setscrew 42 adapted to the through hole 41 into the through hole 41, the extending end of the setscrew 42 abuts against the seed crystal 5 in the square inner hole 113, forming a squeezing force on the side wall of the seed crystal 5 and improving the clamping strength of the seed crystal 5.

[0046] In some embodiments, the through holes 41 are uniformly distributed along the circumferential direction of the graphite card slot 1.

[0047] In this embodiment, since the graphite card slot 1 needs to rotate around the central axis of the connecting rod 2 during operation, in order to improve the stability during rotation, the through holes 41 are evenly distributed. Taking the square inner hole 113 as an example, the number of through holes 41 can be two or four.

[0048] In another application scenario, as Figure 5 shown, the limiting component 4 includes: at least one pin slot 43 and at least one pin 44; the extending direction of the pin slot 43 is perpendicular to the central axis of the connecting rod 2, and the pin slot 43 passes through the seed crystal inner hole 11; the pin 44 is inserted into the pin slot 43.

[0049] In this embodiment, taking the square inner hole as an example, the pin slot 43 extends from one side wall of the graphite card slot 1 to the adjacent other side wall; after the seed crystal 5 is embedded in the seed crystal inner hole 11, the pin 44 is inserted into the pin slot 43, thereby realizing the axial limit of the seed crystal 5.

[0050] Specifically, as Figure 6 shown, a through groove 51 is formed in the side wall of the seed crystal 5, and the groove 51 is adapted to the pin slot 43; the pin 44 inserted into the pin slot 43 will pass through the groove 51 of the seed crystal 5.

[0051] In some embodiments, two pin slots 43 are provided and two pins 44 are provided; the two pin slots 43 are symmetrically arranged along the central axis of the connecting rod 2, thereby improving the stability of the fixture during rotation.

[0052] As Figure 7 shown, in some embodiments, an adhesion plate 6 is slidably arranged in the seed crystal inner hole 11; the seed crystal 5 is connected to the adhesion plate 6 through an adhesive.

[0053] In this embodiment, the seed crystal 5 is connected to the adhesion plate 6 through an adhesive. After the crystal growth is completed, the seed crystal 5 and the adhesion plate 6 are simply removed from the inner hole 11 of the seed crystal, and then the two are separated.

[0054] Specifically, as Figure 7 , Figure 8 shown, a through connection hole 12 is provided on the top surface of the graphite card slot 1; the connection hole 12 communicates with the inner hole 11 of the seed crystal; a threaded hole 61 is provided on the upper surface of the adhesion plate 6; the adhesion plate 6 is connected to the graphite card slot 1 through a bolt 62; after the seed crystal 5 grows to completion, first disassemble the graphite card slot 1 and the connecting rod 2, then disassemble the pin 44 or the setscrew 42, and then disassemble the bolt 62 to release the adhesion plate 6 from the limit, and then the seed crystal 5 can be taken out from the inner hole 11 of the seed crystal; without the adhesion plate 6, the seed crystal 5 needs to adhere to the bottom of the inner hole 11 of the seed crystal, and after the seed crystal 5 is disassembled, it is easy to have glue residue and is not easy to disassemble.

[0055] In summary, this seed crystal fixture limits the seed crystal 5 by extending the limiting component 4 into the inner hole 11 of the seed crystal, thereby improving the stability of the seed crystal; and by providing the adhesion plate 6, the seed crystal 5 and the adhesion plate 6 are connected through an adhesive, making it easy to separate after the seed crystal 5 grows to completion.

[0056] In this document, when it is mentioned that the first component is located on the second component, this may mean that the first component can be directly formed on the second component, or a third component can be inserted between the first component and the second component. In addition, in the drawings, for the effective description of the technical content, the thickness of the components can be exaggerated or reduced.

[0057] In this document, the exemplary embodiments of the present disclosure will be described in more detail with reference to the drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0058] The terms used herein are for describing specific exemplary configurations only and are not intended to be limiting. As used herein, the singular articles "a", "an", and "the" may also be intended to include the plural forms, unless clearly stated otherwise herein. The terms "comprising", "including", and "having" are inclusive and thus specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or their combinations. The method steps, processes, and operations described herein should not be construed as necessarily requiring them to be performed in the particular order discussed or illustrated, unless specifically identified as an order of performance. Additional or alternative steps may be employed.

[0059] As used herein, phrases such as "in one embodiment", "according to one embodiment", "in some embodiments", etc. generally refer to the fact that the particular feature, structure, or characteristic after the phrase may be included in at least one embodiment of the present disclosure. Thus, the particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example", "exemplary", etc. are used "as an example, instance, or illustration. Any embodiment, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other embodiments, aspects, or designs. Instead, the use of the terms "example", "exemplary", etc. is intended to present concepts in a concrete manner.

[0060] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model may be understood according to specific circumstances.

[0061] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second" and other numerical terms used herein do not imply order or sequence unless clearly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer or section discussed above may be referred to as the second element, component, region, layer or section.

[0062] Spatially relative terms, such as "inner", "outer", "below", "beneath", "lower", "above", "upper", etc., may be used herein to describe the relationship of one element or feature to another element or feature as illustrated in the figures. In addition to the orientation depicted in the figures, spatially relative terms are intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is turned over, an element described as "below" or "beneath" another element or feature will be oriented "above" the other element or feature. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein are to be interpreted accordingly.

[0063] In the above discussion, unless otherwise stated, when used to describe a numerical value, terms such as "about", "approximately", "substantially", etc. mean a variation of + / −10% of that value.

[0064] Taking the above-mentioned ideal embodiment of the present utility model as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A seed crystal fixture, characterized in that: include: A graphite card slot (1), the lower surface of which is provided with a seed crystal inner hole (11); A connecting rod (2), the lower end of which is coaxially connected to the graphite slot (1); and The tapered fitting body (3) is coaxially connected to the upper end of the connecting rod (2); wherein A limiting component (4) is provided on the side wall of the graphite slot (1) to limit the position of the seed crystal (5) in the seed crystal inner hole (11).

2. The seed crystal fixture according to claim 1, characterized in that: The limiting assembly (4) comprises: a plurality of through holes (41) and a plurality of top screws (42); wherein The through hole (41) is formed on the side wall of the graphite slot (1) and is connected to the inner hole (11) of the seed crystal; Each of the top screws (42) is disposed in a corresponding through hole (41) and is threadedly connected to the through hole (41). The seed crystal (5) in the seed crystal inner hole (11) is fixed by rotating the top screw (42).

3. The seed crystal fixture according to claim 2, characterized in that: The through holes (41) are evenly distributed along the circumference of the graphite slot (1).

4. The seed crystal fixture according to claim 1, characterized in that: The limiting assembly (4) comprises: at least one pin groove (43) and at least one through pin (44); The extending direction of the pin groove (43) is perpendicular to the central axis of the connecting rod (2), and the pin groove (43) passes through the inner hole (11) of the seed crystal; The through pin (44) is inserted into the pin groove (43).

5. The seed crystal fixture according to claim 4, characterized in that: The side wall of the seed crystal (5) is provided with a through groove (51); The groove (51) is adapted to the pin groove (43).

6. The seed crystal fixture according to claim 5, characterized in that: The pin grooves (43) are two and the through pins (44) are two; The two pin grooves (43) are symmetrically arranged along the central axis of the connecting rod (2).

7. The seed crystal fixture according to claim 1, characterized in that: An adhesion plate (6) is slidably arranged in the inner hole (11) of the seed crystal; The seed crystal (5) is connected to the bonding plate (6) via an adhesive.

8. The seed crystal fixture according to claim 7, characterized in that: The top surface of the graphite slot (1) is provided with a penetrating connection hole (12); The connecting hole (12) is in communication with the inner hole (11) of the seed crystal.

9. The seed crystal fixture according to claim 8, characterized in that: The upper surface of the bonding plate (6) is provided with a threaded hole (61); The bonding plate (6) is connected to the graphite slot (1) via bolts.

10. The seed crystal fixture according to claim 1, characterized in that: The seed crystal inner hole (11) comprises: a hexagonal inner hole (111), a circular inner hole (112), or a square inner hole (113).

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