A tri-coaxial sample holder

Abstract

The application relates to the technical field of a sample seat, and provides a three-coaxial sample seat which comprises a sample seat body, the sample seat body sequentially comprises a top layer, a middle layer and a base from top to bottom in a coaxial mode, the top layer is used for placing a sample, the top layer is electrically connected with a core wire, the middle layer is electrically connected with a shielding wire layer, and the base is electrically connected with a ground wire. The sample seat is divided into three layers of the top layer, the middle layer and the base, and is respectively electrically connected with the core wire, the shielding wire layer and the ground wire. Different function wires (such as the core wire, the shielding layer wire and the ground wire) can be arranged in layers, electromagnetic interference between the wires is effectively isolated, mutual crosstalk between signals is reduced, electrical noise generated due to single wire leakage is reduced, and the beneficial effects of improving signal integrity and accuracy are achieved.

Description

Technical Field

[0001] This application relates to the technical field of sample holders, and in particular to a triaxial sample holder. Background Technology

[0002] A test sample holder is a platform used for testing in a vacuum environment. Typically, samples are placed on the sample holder in a vacuum environment to test their electrical properties.

[0003] Existing sample holders are typically single-layer structures, but they require the simultaneous connection of three wires (core wire, shielding wire, and ground wire). When testing the electrical performance of a sample, leakage in a single wire can cause electrical noise, affecting the test results and making the sample inconvenient to use. Therefore, further improvements are needed. Utility Model Content

[0004] To address the above problems, this application provides a triaxial sample holder.

[0005] This application provides a triaxial sample holder, which adopts the following technical solution: A triaxial sample holder includes a sample holder body, which comprises, from top to bottom, a top layer, a middle layer, and a base arranged coaxially. The top layer is used to place the sample and is electrically connected to the core wire. The middle layer is electrically connected to the shielding layer and the base is electrically connected to the ground wire.

[0006] By adopting the above technical solution, the sample holder is divided into three layers: top layer, middle layer and base layer, which are electrically connected to the core wire, shielding layer and ground wire respectively. This allows for the layered arrangement of wires with different functions (such as core wire, shielding layer wire and ground wire), effectively isolating electromagnetic interference between wires, reducing crosstalk between signals, thereby reducing electrical noise caused by leakage of a single wire and improving signal integrity and accuracy.

[0007] Preferably, the sample holder body further includes an insulating layer disposed between the top layer and the intermediate layer and between the intermediate layer and the base.

[0008] By adopting the above technical solution and by setting an insulating layer, the electrical connection between each layer can be effectively isolated, reducing leakage between the core wire, shielding layer and ground wire, thereby reducing electrical noise and improving the accuracy and reliability of test results.

[0009] Preferably, the insulating layer has several layers.

[0010] By adopting the above technical solution, setting several insulating layers can effectively enhance the insulation performance of the sample holder, reduce leakage between different wires, and thus reduce the impact of electrical noise on the test results. Specifically, this solution improves the electrical isolation effect of the sample holder in a vacuum environment by increasing the number of insulating layers, thereby improving the accuracy and reliability of testing the electrical performance of the sample.

[0011] Preferably, the plurality of insulating layers include a first insulating layer disposed in the middle and a second insulating layer disposed on the upper and lower surfaces of the first insulating layer. The width of the second insulating layer is smaller than the width of the first insulating layer. The second insulating layer and the first insulating layer are coaxially disposed. Positioning grooves are formed on the surfaces of the top layer, the middle layer, and the middle layer and the base that are close to each other. The second insulating layer is inserted into the positioning groove.

[0012] By adopting the above technical solution, the second insulating layer is inserted into the positioning groove, which not only achieves precise positioning to reduce the possibility of relative movement of the insulating layers, but also further improves the insulation stability between the layers. In addition, the design that the width of the second insulating layer is smaller than that of the first insulating layer reduces unnecessary material usage and lowers manufacturing costs.

[0013] Preferably, the sample holder body further includes a fixing member, and a plurality of fixing members are spaced apart around the axis of the sample holder body. The fixing member includes a fixing bolt passing through the base and the intermediate layer. The fixing bolt is threadedly connected to the top layer. The fixing bolt is an insulating bolt.

[0014] By adopting the above technical solution, the fasteners effectively enhance the structural stability of the sample holder body, ensuring a tight connection between the top layer, middle layer, and base. The fixing bolts are spaced apart around the axis of the sample holder body, resulting in more uniform stress distribution and preventing structural deformation caused by localized stress concentration, thus maintaining the coaxiality of the top layer, middle layer, and base. Furthermore, the use of insulating bolts effectively prevents leakage between layers with different potentials, thereby significantly reducing electrical noise and improving the accuracy and reliability of the test results.

[0015] Preferably, the insulating layer is an insulating sleeve coaxially sleeved outside the fixing bolt.

[0016] By adopting the above technical solution, the insulating layer is set as an insulating sleeve coaxially fitted outside the fixing bolts, which effectively enhances the insulation performance of the sample holder, reduces the possibility of electrical noise caused by wire leakage, and thus improves the accuracy of test results. At the same time, the structural design of the insulating sleeve simplifies the installation process of the insulating layer and improves the assembly efficiency of the sample holder. Furthermore, it further ensures electrical isolation between the layers when the fixing bolts connect the top layer, intermediate layer, and base, enhancing the overall stability of the sample holder.

[0017] Preferably, heat dissipation grooves are provided on the surfaces of the top layer, the middle layer, and the middle layer and the base that are close to each other, and the heat dissipation grooves are provided along the entire length or width of the sample holder body.

[0018] By adopting the above technical solution, heat dissipation grooves are formed on the top layer, the middle layer, and the surfaces of the middle layer and the base that are close to each other. The heat dissipation grooves are arranged along the entire length or width of the sample holder body, which can significantly increase the heat dissipation area inside the sample holder and improve the heat dissipation efficiency, thereby effectively reducing the temperature accumulation of the sample holder during use. This design helps to maintain the temperature balance between the layers inside the sample holder, reduce the fluctuation of electrical performance caused by temperature differences, and improve the accuracy and reliability of test results.

[0019] Preferably, the outer peripheral wall of the top layer is provided with a moisture-proof layer.

[0020] By adopting the above technical solution, the moisture-proof layer surrounding the outer perimeter of the top layer can effectively reduce the intrusion of external moisture into the sample holder, thereby reducing the electrical performance degradation or short circuit problems caused by moisture, and ensuring the stability and reliability of the sample holder in a humid environment.

[0021] Preferably, the top layer has a plurality of heat dissipation holes and a plurality of placement positions for placing samples, with the plurality of heat dissipation holes and the plurality of placement positions arranged alternately.

[0022] By adopting the above technical solution, several heat dissipation holes are provided on the top layer, which effectively improves the heat dissipation performance of the sample holder and reduces the decrease in testing accuracy or equipment damage caused by heat accumulation. Furthermore, the staggered arrangement of the heat dissipation holes and the placement positions not only optimizes the spatial layout but also maximizes the heat dissipation effect while ensuring sufficient sample placement area, thereby improving overall testing efficiency and accuracy.

[0023] Preferably, it further includes a heat dissipation mechanism disposed on the sample holder body, the heat dissipation mechanism including a heat dissipation fan disposed on the base and heat dissipation fins disposed on the sample holder body.

[0024] By adopting the above technical solution and adding a heat dissipation mechanism, a cooling fan, and heat dissipation fins, the overall heat dissipation efficiency of the sample holder can be effectively improved, and the test error caused by heat accumulation can be reduced, thereby ensuring that the sample can be tested for electrical performance in a stable working environment.

[0025] In summary, this utility model has the following beneficial effects: 1. By designing the sample holder as a three-coaxial structure comprising a top layer, a middle layer, and a base, which are electrically connected to the core wire, the shielding layer wire, and the ground wire respectively, the signals of each wire are effectively isolated, electrical noise is significantly reduced, and the accuracy of test results is improved. 2. The insulation layer further enhances the electrical isolation performance between layers, avoids interlayer leakage, and ensures the stability of electrical performance testing; 3. The overall structure of the sample holder is reasonably designed, which facilitates installation and maintenance, and improves the convenience of sample placement and testing operations. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application; Figure 2 This is a schematic diagram of the insulating layer structure in Embodiment 1 of this application; Figure 3 This is a side view of Embodiment 1 of this application; Figure 4 This is a side view of Embodiment 2 of this application; Figure 5 yes Figure 4 A magnified view of part A in the middle; Figure 6 This is a top view of Embodiment 2 of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Sample holder body; 11. Top layer; 111. Placement position; 112. Moisture-proof layer; 113. Heat dissipation hole; 12. Middle layer; 13. Base; 14. Insulation layer; 141. First insulation layer; 142. Second insulation layer; 15. Fixing component; 2. Positioning groove; 3. Heat dissipation mechanism; 31. Cooling fan; 32. Heat dissipation fins. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail below.

[0029] This application discloses a triaxial sample holder.

[0030] Example 1: A triaxial sample holder, reference Figure 1 , Figure 2 The sample holder body 1 includes a top layer 11, a middle layer 12, a base 13, an insulating layer 14, and a fixing member 15, all coaxially arranged. The top layer 11 is used to place the sample and has several placement positions 111 for placing the sample. The top layer 11 is electrically connected to the core wire, the middle layer 12 is electrically connected to the shielding layer, and the base 13 is electrically connected to the ground wire.

[0031] In this embodiment, the top layer 11 can be made of materials with good conductivity such as copper or aluminum, the middle layer 12 can be made of copper or silver-plated copper, and is used to connect the shielding layer wire. The base 13 includes a metal base and a grounding terminal. The metal base can be made of stainless steel or aluminum alloy. The grounding terminal is fixed to the base 13 by a threaded connection and is connected to the ground wire.

[0032] Reference Figure 2 , Figure 3 The insulating layer 14 is provided in two sets, respectively positioned between the top layer 11 and the intermediate layer 12, and between the intermediate layer 12 and the base 13. Each set of insulating layers 14 comprises several layers, including at least a first insulating layer 141 positioned in the middle and two second insulating layers 142 respectively positioned on the upper and lower surfaces of the first insulating layer 141. The second insulating layers 142 and the first insulating layer 141 are coaxially arranged, and the width of the second insulating layer 142 is smaller than the width of the first insulating layer 141. Positioning grooves 2 are formed on the surfaces of the top layer 11, the intermediate layer 12, and the intermediate layer 12 and the base 13 that are close to each other. The positioning grooves 2 are arranged along the entire length or width of the sample holder. The second insulating layer 142 is inserted into the positioning groove 2. It should be noted that the insulating layer 14 can be made of thick-walled ceramic material, which has good mechanical strength and insulation performance, or it can be made of thin-walled polytetrafluoroethylene material, which has high heat resistance and flexibility, depending on the requirements.

[0033] As shown in the figure, the insulating layer 14 can be an insulating sleeve coaxially fitted outside the fixing bolt. In this case, the positioning groove 2 is a heat dissipation groove. Compared with the insulating layer 14 set in the plate, it can provide insulation while also increasing the heat dissipation area.

[0034] Among them, several fasteners 15 are arranged at intervals around the axis of the sample holder body. The fasteners 15 specifically include fixing bolts that pass through the base 13 and the intermediate layer 12. The fixing bolts are threadedly connected to the top layer 11. It should be noted that the fixing bolts are insulated bolts.

[0035] The implementation principle of a triaxial sample holder in this application embodiment is as follows: the sample holder is divided into three layers: top layer 11, middle layer 12 and base layer 13, which are electrically connected to the core wire, shielding layer and ground wire respectively. This allows for the layered arrangement of wires with different functions (such as core wire, shielding layer wire and ground wire), effectively isolating electromagnetic interference between wires, reducing crosstalk between signals, thereby reducing electrical noise caused by leakage of a single wire and improving the integrity and accuracy of the signal.

[0036] Example 2: Reference Figure 4 , Figure 5The difference from Example 1 is that a moisture-proof layer 112 is provided around the outer peripheral wall of the top layer 11. The moisture-proof layer 112 is made of silicone or polyurethane material and has a thickness of 1mm to 3mm. It can effectively reduce the intrusion of moisture so that the sample holder can be used normally in a humid environment.

[0037] Reference Figure 6 In this embodiment, a number of heat dissipation holes 113 are provided on the top layer 11. The number of heat dissipation holes 113 and a number of placement slots 111 are arranged alternately. The alternating arrangement of heat dissipation holes 113 and placement slots not only improves heat dissipation efficiency, but also ensures the stability of sample placement.

[0038] Back Figure 4 It also includes a heat dissipation mechanism 3 disposed on the sample holder body 1. The heat dissipation mechanism 3 includes a heat dissipation fan 31 disposed on the base 13 and heat dissipation fins 32 disposed on the top layer 11, the middle layer 12 and the base 13. The heat dissipation fan 31 is a small DC fan with adjustable airflow and is fixed to the base 13 by a bracket. The heat dissipation fins 32 are made of aluminum alloy material with a thickness of 1mm to 2mm and a height of 5mm to 10mm. They are evenly distributed on the surfaces of the top layer 11 and the middle layer 12, as well as the surfaces of the middle layer 12 and the base 13 that are close to each other, significantly increasing the heat dissipation area.

[0039] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A triaxial sample holder, characterized in that: The sample holder body (1) includes, from top to bottom, a top layer (11), a middle layer (12) and a base (13) arranged coaxially. The top layer (11) is used to place the sample. The top layer (11) is electrically connected to the core wire. The middle layer (12) is electrically connected to the shielding layer. The base (13) is electrically connected to the ground wire. The sample holder body (1) also includes an insulating layer (14) disposed between the top layer (11) and the middle layer (12) and between the middle layer (12) and the base (13).

2. The triaxial sample holder according to claim 1, characterized in that: The insulating layer (14) has several layers.

3. A triaxial sample holder according to claim 2, characterized in that: The plurality of insulating layers (14) include at least a first insulating layer (141) disposed in the middle and two second insulating layers (142) disposed on the upper and lower surfaces of the first insulating layer (141) respectively. The width of the second insulating layer (142) is smaller than the width of the first insulating layer (141). The second insulating layer (142) and the first insulating layer (141) are coaxially disposed. The top layer (11), the middle layer (12), and the surfaces of the middle layer (12) and the base (13) that are close to each other are provided with positioning grooves (2). The second insulating layer (142) is inserted into the positioning groove (2).

4. A triaxial sample holder according to claim 1, characterized in that: The sample holder body (1) also includes a fixing member (15). Several fixing members (15) are spaced apart around the axis of the sample holder body (1). The fixing member (15) includes a fixing bolt that passes through the base (13) and the intermediate layer (12). The fixing bolt is threaded to the top layer (11). The fixing bolt is an insulating bolt.

5. A triaxial sample holder according to claim 4, characterized in that: The insulating layer (14) is an insulating sleeve coaxially sleeved outside the fixing bolt.

6. A triaxial sample holder according to claim 5, characterized in that: Heat dissipation grooves are provided on the surfaces of the top layer (11), the middle layer (12), and the base (13) that are close to each other. The heat dissipation grooves are provided along the length or width of the sample holder body (1).

7. A triaxial sample holder according to claim 1, characterized in that: The outer periphery of the top layer (11) is surrounded by a moisture-proof layer (112).

8. A triaxial sample holder according to claim 1, characterized in that: The top layer (11) has a number of heat dissipation holes (113) and a number of placement positions (111) for placing samples. The heat dissipation holes (113) and the placement positions (111) are arranged alternately.

9. A triaxial sample holder according to claim 4, characterized in that: It also includes a heat dissipation mechanism (3) disposed on the sample holder body (1), the heat dissipation mechanism (3) including a heat dissipation fan (31) disposed on the base (13) and heat dissipation fins (32) disposed on the sample holder body (1).

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