Conductive filler impedance testing device

Abstract

The utility model discloses a testing device for impedance of conductive filler. The testing device comprises a signal shielding sleeve, an insulating substrate and two signal transmission conductors, the two signal transmission conductors are coaxially and detachably installed at the two ends of the signal shielding sleeve. The insulating substrate is installed in the signal shielding sleeve. The insulating substrate is provided with a through hole used for being filled with conductive filler. The signal transmission conductor comprises an outer shielding body, an insulator and an inner conductor which are sequentially sleeved from outside to inside, and the signal shielding sleeve is sleeved outside the outer shielding body; the outer end part of the inner conductor is provided with an accommodating groove for accommodating a test connecting line of the network analyzer; and the insulating substrate is abutted between the inner end parts of the inner conductors of the two signal transmission conductors. The conductive filler impedance testing device provided by the utility model can effectively shield external interference under a high-frequency signal on the premise of reducing the size requirement of a test sample, improves the stability of the signal in a transmission process, and improves the accuracy of a test result.

Description

Technical Field

[0001] The utility model relates to the technical field of impedance testing devices, in particular to a testing device for the impedance of a conductive filler. Background Art

[0002] With the rapid development of microelectronics technology, particularly the increasing density of integrated circuit (IC) packaging and the sharp increase in signal transmission frequency, microvia filling technology is playing an increasingly important role in multilayer circuit boards (MLBs), three-dimensional packaging (3D packaging), and advanced packaging technologies. By precisely filling tiny holes with conductive material, this technology enables efficient interconnection between layers, significantly reducing signal transmission delays, lowering system power consumption, and significantly increasing signal transmission speed and bandwidth. This revolution has not only driven a leap in electronic product performance, but also placed more stringent requirements on the performance of conductive fillers, particularly their impedance characteristics.

[0003] In high-frequency signal transmission environments, the impedance characteristics of conductive fillers are directly related to signal integrity, stability, and transmission efficiency. Ideally, conductive fillers should possess stable impedance values, maintaining low signal reflection and crosstalk across a wide frequency band, thereby ensuring clear signal transmission. Therefore, accurate impedance testing of conductive fillers is crucial for ensuring the performance of electronic products.

[0004] However, existing impedance testing devices face numerous challenges when testing the impedance of conductive fillers. Firstly, to ensure the correct placement of the conductive filler in the test fixture and good electrical contact, thereby ensuring accurate test results, the conductive filler must be prepared into test samples that meet specific dimensional requirements, placing high demands on the size of the test sample. Secondly, during high-frequency signal transmission, electromagnetic waves, ground noise, or radiation from other electronic devices in the test environment can affect the signal transmission path, causing the test results to deviate from the true value and fail to accurately reflect the true impedance characteristics of the conductive filler. Utility Model Content

[0005] The purpose of this utility model is to propose a testing device for the impedance of conductive fillers, which can effectively shield external interference under high-frequency signals while reducing the size requirements of the test sample, improve the stability of the signal during transmission, and improve the accuracy of the test results, so as to overcome the shortcomings of the existing technology.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A conductive filler impedance test device comprises a signal shielding sleeve, an insulating substrate, and two signal transmission conductors; the two signal transmission conductors are coaxially and detachably mounted at both ends of the signal shielding sleeve, the outer ends of the signal transmission conductors being used to connect to a test connection line of a network analyzer; the insulating substrate is mounted inside the signal shielding sleeve and abuts between the inner ends of the two signal transmission conductors, and the insulating substrate is provided with a through hole for filling with a conductive filler;

[0008] The signal transmission conductor comprises an outer shield, an insulator and an inner conductor which are sequentially sleeved from the outside to the inside, and the signal shielding sleeve is sleeved on the outside of the outer shield;

[0009] The inner conductors of the two signal transmission conductors are arranged opposite to each other, and the outer ends of the inner conductors are provided with a receiving groove for accommodating the test connection line of the network analyzer; the inner end of the inner conductor protrudes from the inner end of the insulator, and the insulating substrate is placed between the inner end of the inner conductors of the two signal transmission conductors.

[0010] Furthermore, the inner conductor is in the shape of a thin needle, the end surface of the outer end of the inner conductor is a plane, and the inner end of the inner conductor is in the shape of a cone;

[0011] The signal transmission conductor also includes a signal post, which is located inside the outer shielding body. The signal post is sleeved on the outside of the inner end portion of the inner conductor and protrudes from the outer shielding body. An installation gap for accommodating the insulating substrate is left between the signal posts of the two signal transmission conductors, and the cross-sectional area of the signal post is larger than the cross-sectional area of the insulating substrate.

[0012] Furthermore, the inner conductor and the signal post are both made of any one of aluminum, copper and silver, and the inner end of the inner conductor is interference-fitted with the signal post.

[0013] Furthermore, the central axes of the outer shield, the insulator, the inner conductor, the signal column and the insulating substrate all coincide with each other, the accommodating groove is opened at the center of the inner conductor, and the through hole is opened at the center of the insulating substrate.

[0014] Furthermore, conductive layers are provided at both ends of the insulating substrate, and the conductive layers are located between the insulating substrate and the signal pillars.

[0015] Furthermore, the outer shielding body further includes a limiting portion, which is protrudingly provided on the outer side wall of the outer shielding body, and the signal shielding sleeve is positioned between the limiting portions of the two signal transmission conductors.

[0016] Furthermore, the limiting portion is located in the middle of the outer shielding body, and the limiting portion and the outer shield body are integrally formed.

[0017] Furthermore, the signal shielding sleeve includes a first shielding sleeve and a second shielding sleeve, and the inner end portion of the second shielding sleeve is detachably connected to the inner end portion of the first shielding sleeve;

[0018] The first shielding cylinder is sleeved on the outside of the outer shielding body of the signal transmission conductor, and the outer end of the first shielding cylinder abuts against the limiting portion of the signal transmission conductor;

[0019] The second shielding cylinder is sleeved on the outside of the outer shielding body of the other signal transmission conductor, and the outer end portion of the second shielding cylinder abuts against the limiting portion of the other signal transmission conductor.

[0020] Furthermore, the first shielding cylinder includes an integrally formed first connecting portion and a first protruding portion, the first connecting portion being sleeved on the outside of an outer shielding body of the signal transmission conductor, the outer end portion of the first connecting portion being in contact with a limiting portion of the signal transmission conductor, the inner end portion of the first connecting portion being protrudingly provided with the first protruding portion, and the first protruding portion being provided on the outside of the insulating substrate;

[0021] The second shielding cylinder includes an integrally formed second connecting portion and a second protruding portion, the second connecting portion being sleeved on the outside of the outer shielding body of the other signal transmission conductor, the outer end portion of the second connecting portion being in contact with the limiting portion of the other signal transmission conductor, the inner end portion of the second connecting portion being protrudingly provided with the second protruding portion, and the second protruding portion being provided on the outside of the insulating substrate;

[0022] The second protrusion is detachably mounted on the outside of the first protrusion.

[0023] Furthermore, the first connection portion is threadedly connected to the outer shield of one of the signal transmission conductors, the second connection portion is threadedly connected to the outer shield of another of the signal transmission conductors, and the second protrusion is threadedly connected to the first protrusion.

[0024] The technical solution provided by the utility model may have the following beneficial effects:

[0025] 1. The signal transmission conductor consists of an outer shield, an insulator, and an inner conductor, which are arranged in sequence from the outside inward. The signal shielding sleeve is placed on the outside of the outer shield, forming an effective primary electromagnetic shielding layer, and the outer shield forms an effective secondary shielding layer. This can significantly reduce the impact of external electromagnetic interference on signal transmission and improve the stability and reliability of signal transmission. In addition, the insulator is placed on the outside of the inner conductor to provide insulation and protection, preventing signal leakage and external interference. Therefore, the cooperation of the signal shielding sleeve, outer shield, and insulator protects the signal from being affected, ensuring the accuracy of the impedance test results of the conductive filler.

[0026] 2. Through holes for filling conductive fillers are provided on the insulating substrate, so that liquid or solid conductive fillers can be directly filled into the through holes according to the size of the through holes. After the conductive fillers are solidified, the test samples can be obtained. This avoids the defect of the prior art that the conductive fillers must first be prepared into a specific size and then placed in the test fixture, which has high requirements on the size of the test samples, thereby reducing the size requirements of the test samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The utility model is a structural schematic diagram of a conductive filler impedance testing device in an uninstalled state.

[0028] Figure 2 The utility model is a structural schematic diagram of a conductive filler impedance testing device in an installed state.

[0029] Figure 3 It is a cross-sectional view of a testing device for conductive filler impedance according to the present invention.

[0030] Among them: signal shielding sleeve 1, first shielding tube 11, first connecting part 111, first protrusion 112, second shielding tube 12, second connecting part 121, second protrusion 122, insulating substrate 2, through hole 21, signal transmission conductor 3, outer shielding body 31, limiting part 311, insulator 32, inner conductor 33, accommodating groove 331, signal column 34. DETAILED DESCRIPTION

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] The present technical solution provides a conductive filler impedance test device, comprising a signal shielding sleeve 1, an insulating substrate 2, and two signal transmission conductors 3; the two signal transmission conductors 3 are coaxially and detachably mounted at both ends of the signal shielding sleeve 1, and the outer ends of the signal transmission conductors 3 are used to connect to the test connection line of a network analyzer; the insulating substrate 2 is mounted inside the signal shielding sleeve 1, and the insulating substrate 2 abuts between the inner ends of the two signal transmission conductors 3, and the insulating substrate 2 is provided with a through hole 21 for filling with a conductive filler;

[0033] The signal transmission conductor 3 includes an outer shield 31, an insulator 32 and an inner conductor 33 which are sequentially sleeved from the outside to the inside, and the signal shielding sleeve 1 is sleeved on the outside of the outer shield 31;

[0034] The inner conductors 33 of the two signal transmission conductors 3 are arranged opposite to each other, and the outer ends of the inner conductors 33 are provided with a receiving groove 331 for accommodating the test connection line of the network analyzer; the inner ends of the inner conductors 33 protrude from the inner ends of the insulator 32, and the insulating substrate 2 is placed between the inner ends of the inner conductors 33 of the two signal transmission conductors 3.

[0035] In order to overcome the technical problems of the prior art in terms of high requirements on the size of the test sample and poor accuracy of the test results, this technical solution proposes a test device for the impedance of the conductive filler, such as Figures 1 to 3 As shown, it includes a signal shielding sleeve 1, an insulating substrate 2 and two signal transmission conductors 3. The two signal transmission conductors 3 are coaxially and detachably installed at both ends of the signal shielding sleeve 1. On the one hand, it is beneficial to maintain the symmetry and stability of signal transmission. On the other hand, the two signal transmission conductors 3 are detachably connected through the signal shielding sleeve 1. When any one of the signal transmission conductors 3 needs to be repaired, replaced or adjusted, it is only necessary to remove the corresponding signal transmission conductor 3, which improves the convenience of repair, replacement or adjustment.

[0036] The working process of this technical solution is as follows: first, fill the conductive filler into the through hole 21 of the insulating substrate 2, and obtain a test sample after curing the conductive filler. Then, install the insulating substrate 2 and the two signal transmission conductors 3 inside the signal shielding sleeve 1. Finally, connect the test connection line of the network analyzer to the outer ends of the two signal transmission conductors 3, so that the two ends of the device are connected to the network analyzer through the test connection line respectively. The signal source sent by the network analyzer is transmitted to a signal transmission conductor 3 through a test connection line, and the signal is transmitted to another signal transmission conductor 3 after passing through the conductive filler; the signal is then transmitted to the receiving signal source through another test connection line and returned to the network analyzer. By analyzing the amplitude and phase changes of the signal during the transmission process, the test of the conductive filler impedance is completed.

[0037] Specifically, signal transmission conductor 3 comprises an outer shield 31, an insulator 32, and an inner conductor 33, arranged sequentially from the outside inward. Signal shielding sleeve 1 is positioned over outer shield 31, forming an effective primary electromagnetic shielding layer. Outer shield 31 forms an effective secondary shielding layer, significantly reducing the impact of external electromagnetic interference on signal transmission and improving signal transmission stability and reliability. Furthermore, insulator 32 is positioned over inner conductor 33, providing insulation and protection against signal leakage and external interference. Therefore, the coordinated integration of signal shielding sleeve 1, outer shield 31, and insulator 32 protects the signal from interference, ensuring the accuracy of the impedance test results for the conductive filler.

[0038] Furthermore, the insulating substrate 2 is provided with a through hole 21 for filling with a conductive filler, so that liquid or solid conductive fillers can be directly filled into the through hole 21 according to the size of the through hole 21. After the conductive filler is solidified, the test sample can be obtained, which avoids the defect of the prior art that the conductive filler must first be prepared into a specific size and then placed in the test fixture, which has high requirements for the size of the test sample, thereby reducing the size requirements of the test sample. In addition, the insulating substrate 2 is placed between the inner ends of the inner conductors 33 of the two signal transmission conductors 3, which can effectively reduce the loss and interference of the signal during transmission, which is conducive to maintaining the strength and clarity of the signal, so that the signal can be accurately transmitted from one end to the other, and the accuracy of the measurement results is improved. It should be noted that the conductive filler can be any one of conductive glue, conductive ink and metal powder, and the material of the insulating substrate 2 can be any one of polyimide PI, glass substrate and ceramic, which are not limited here.

[0039] Furthermore, a receiving groove 331 is provided at the outer end of the inner conductor 33. When a signal test is required, the test connection line can be inserted into the receiving groove 331 of the inner conductor 33 to establish an electrical connection with the inner conductor 33, making the testing process simple and quick without the need to disassemble the entire device.

[0040] Further explanation: the inner conductor 33 is in the shape of a thin needle, and the end surface of the outer end of the inner conductor 33 is a plane, and the inner end of the inner conductor 33 is in the shape of a cone;

[0041] The signal transmission conductor 3 also includes a signal column 34, which is located inside the outer shielding body 31. The signal column 34 is sleeved on the outside of the inner end of the inner conductor 33. The signal column 34 protrudes from the outer shielding body 31. An installation gap for accommodating the insulating substrate 2 is left between the signal columns 34 of the two signal transmission conductors 3, and the cross-sectional area of the signal column 34 is larger than the cross-sectional area of the insulating substrate 2.

[0042] Designing inner conductor 33 as a thin needle helps reduce resistance and inductance during signal transmission, improving the accuracy of test results. Furthermore, providing signal post 34 with a cross-sectional area larger than that of insulating substrate 2 helps disperse the electromagnetic field, reducing interference and attenuation during signal transmission, thereby improving test accuracy.

[0043] To further illustrate, the inner conductor 33 and the signal post 34 are both made of any one of aluminum, copper and silver, and the inner end of the inner conductor 33 is interference-fitted with the signal post 34 .

[0044] Because aluminum, copper, and silver all have good electrical conductivity, the inner conductor 33 and signal post 34 are made of any of these materials. Furthermore, the inner end of the inner conductor 33 forms an interference fit with the signal post 34. This ensures close contact between the two, preventing loosening or falling off, thereby improving connection strength. Furthermore, it reduces the gap between the contact surfaces of the inner conductor 33 and signal post 34, lowering contact resistance and facilitating signal transmission, thereby reducing measurement errors.

[0045] To further illustrate, the central axes of the outer shield 31 , the insulator 32 , the inner conductor 33 , the signal column 34 and the insulating substrate 2 all coincide with each other, and the accommodating groove 331 is opened at the center of the inner conductor 33 , and the through hole 21 is opened at the center of the insulating substrate 2 .

[0046] The central axes of the outer shield 31, insulator 32, inner conductor 33, signal post 34, and insulating substrate 2 all coincide, enhancing the device's symmetry. This helps reduce signal reflection and attenuation caused by structural asymmetry, improves signal transmission stability, and reduces signal attenuation and distortion, thereby reducing measurement errors. Furthermore, the coincidence of the central axes of the outer shield 31, insulator 32, inner conductor 33, signal post 34, and insulating substrate 2 makes disassembly and reassembly of the device easier and faster, facilitating maintenance and replacement.

[0047] Furthermore, the accommodating slot 331 is located at the center of the inner conductor 33, allowing the network analyzer's test cable to connect directly to the center of the inner conductor 33 upon insertion. This ensures that the test signal accurately reflects the signal state on the inner conductor 33, thereby improving the accuracy of the test results. Furthermore, the through hole 21 is located at the center of the insulating substrate 2, allowing the conductive filler to be placed in the center of the insulating substrate 2. This helps reduce signal reflection and attenuation caused by structural asymmetry, thereby improving the accuracy of the test results.

[0048] To further illustrate, conductive layers are provided at both ends of the insulating substrate 2 , and the conductive layers are located between the insulating substrate 2 and the signal pillar 34 .

[0049] By providing a conductive layer, the contact performance between the insulating substrate 2 and the signal post 34 is improved by utilizing the conductive layer, thereby indirectly improving the efficiency of signal transmission and the accuracy of impedance measurement. It should be noted that the conductive layer can be a solid material with conductive function, such as a conductive metal, or can be formed by curing a conductive paste with conductive function.

[0050] To further illustrate, the outer shielding body 31 further includes a limiting portion 311 , which is protrudingly provided on the outer side wall of the outer shielding body 31 , and the signal shielding sleeve 1 is positioned between the limiting portions 311 of the two signal transmission conductors 3 .

[0051] Because the signal shielding sleeve 1 must rest tightly between the two signal transmission conductors 3 to achieve effective electromagnetic shielding, the stopper 311 provides positioning and limiting functions, ensuring that the signal shielding sleeve 1 can be accurately installed in the predetermined position. This eliminates the need to re-confirm the installation position of the signal shielding sleeve 1 when replacing the signal shielding sleeve 1, improving replacement efficiency. Furthermore, the stopper 311 protrudes from the outer wall of the outer shielding body 31, forming a stable support surface that can resist external forces and ensure that the signal transmission conductors 3 do not loosen or shift during use.

[0052] To further illustrate, the limiting portion 311 is located in the middle of the outer shielding body 31 , and the limiting portion 311 and the outer shielding body 31 are integrally formed.

[0053] The stopper 311 is located in the middle of the outer shield 31, helping to ensure that the signal shielding sleeve 1 can be accurately installed between the two signal transmission conductors 3. In addition, the stopper 311 is integrally formed with the outer shield 31, which improves the robustness of the device, can more effectively resist external shock and vibration, reduce signal attenuation or failure caused by structural looseness, and further reduce measurement errors.

[0054] Further description, the signal shielding sleeve 1 includes a first shielding cylinder 11 and a second shielding cylinder 12, and the inner end portion of the second shielding cylinder 12 is detachably connected to the inner end portion of the first shielding cylinder 11;

[0055] The first shielding tube 11 is sleeved on the outside of the outer shielding body 31 of the signal transmission conductor 3, and the outer end of the first shielding tube 11 abuts against the limiting portion 311 of the signal transmission conductor 3;

[0056] The second shielding tube 12 is sleeved on the outside of the outer shielding body 31 of the other signal transmission conductor 3 , and the outer end of the second shielding tube 12 abuts against the limiting portion 311 of the other signal transmission conductor 3 .

[0057] By providing a split design for the signal shielding sleeve 1, the length and shape of the signal shielding sleeve 1 can be flexibly adjusted as needed to accommodate signal transmission conductors 3 of different sizes and shapes. In addition, the split design facilitates that when the first shielding tube 11 or the second shielding tube 12 is damaged, only the damaged portion needs to be replaced, without replacing the entire signal shielding sleeve 1, thereby reducing maintenance and replacement costs.

[0058] Further, the first shielding tube 11 includes an integrally formed first connecting portion 111 and a first protruding portion 112. The first connecting portion 111 is sleeved on the outside of the outer shielding body 31 of the signal transmission conductor 3. The outer end of the first connecting portion 111 abuts against the limiting portion 311 of the signal transmission conductor 3. The inner end of the first connecting portion 111 is protrudingly provided with the first protruding portion 112, and the first protruding portion 112 is provided on the outside of the insulating substrate 2.

[0059] The second shielding cylinder 12 includes an integrally formed second connecting portion 121 and a second protruding portion 122. The second connecting portion 121 is sleeved on the outside of the outer shielding body 31 of the other signal transmission conductor 3. The outer end of the second connecting portion 121 abuts against the limiting portion 311 of the other signal transmission conductor 3. The inner end of the second connecting portion 121 is protrudingly provided with the second protruding portion 122, and the second protruding portion 122 is provided on the outside of the insulating substrate 2.

[0060] The second protrusion 122 is detachably mounted on the outside of the first protrusion 112 .

[0061] Second protrusion 122 is removably mounted on the exterior of first protrusion 112, facilitating connection and separation between first and second shielding cylinders 11, 12, and facilitating installation, maintenance, and replacement. Furthermore, first and second protrusions 112, 122 are both located outside of insulating substrate 2, facilitating the insertion of insulating substrates 2 with larger cross-sectional areas, thereby accommodating larger test samples and improving the device's applicability.

[0062] To further illustrate, the first connection portion 111 is threadedly connected to the outer shield 31 of one signal transmission conductor 3 , the second connection portion 121 is threadedly connected to the outer shield 31 of another signal transmission conductor 3 , and the second protrusion 122 is threadedly connected to the first protrusion 112 .

[0063] Compared to other detachable installation methods, threaded connections offer a simple structure, reliable connection, and easy assembly and disassembly. Therefore, in a preferred embodiment of this technical solution, the first connecting portion 111 is threadedly connected to the outer shield 31 of one signal transmission conductor 3, the second connecting portion 121 is threadedly connected to the outer shield 31 of another signal transmission conductor 3, and the second protrusion 122 is threadedly connected to the first protrusion 112. This not only improves the stability and reliability of signal transmission, but also allows the signal shielding sleeve 1 to be easily removed and reinstalled by rotating the threads when it needs to be cleaned, inspected, or replaced, reducing maintenance costs and difficulty.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0065] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0066] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0067] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0068] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0069] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0070] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present invention without inventive effort, and such implementations will fall within the scope of protection of the present invention.

Claims

1. A device for testing the impedance of a conductive filler, characterized by: The device comprises a signal shielding sleeve, an insulating substrate, and two signal transmission conductors; the two signal transmission conductors are coaxially and detachably mounted at both ends of the signal shielding sleeve, and the outer ends of the signal transmission conductors are used to connect to the test connection line of the network analyzer; the insulating substrate is mounted inside the signal shielding sleeve and abuts between the inner ends of the two signal transmission conductors, and the insulating substrate is provided with a through hole for filling with a conductive filler; The signal transmission conductor comprises an outer shield, an insulator and an inner conductor which are sequentially sleeved from the outside to the inside, and the signal shielding sleeve is sleeved on the outside of the outer shield; The inner conductors of the two signal transmission conductors are arranged opposite to each other, and the outer ends of the inner conductors are provided with a receiving groove for accommodating the test connection line of the network analyzer; the inner end of the inner conductor protrudes from the inner end of the insulator, and the insulating substrate is placed between the inner end of the inner conductors of the two signal transmission conductors.

2. The conductive filler impedance testing device according to claim 1, characterized in that: The inner conductor is in the shape of a thin needle, the end surface of the outer end of the inner conductor is a plane, and the inner end of the inner conductor is in the shape of a cone; The signal transmission conductor also includes a signal post, which is located inside the outer shielding body. The signal post is sleeved on the outside of the inner end portion of the inner conductor and protrudes from the outer shielding body. An installation gap for accommodating the insulating substrate is left between the signal posts of the two signal transmission conductors, and the cross-sectional area of the signal post is larger than the cross-sectional area of the insulating substrate.

3. The conductive filler impedance testing device according to claim 2, characterized in that: The inner conductor and the signal post are both made of any one of aluminum, copper and silver, and the inner end of the inner conductor is interference-fitted with the signal post.

4. The conductive filler impedance testing device according to claim 2, characterized in that: The central axes of the outer shield, the insulator, the inner conductor, the signal column and the insulating substrate all coincide with each other, the receiving groove is opened at the center of the inner conductor, and the through hole is opened at the center of the insulating substrate.

5. The conductive filler impedance testing device according to claim 2, characterized in that: Conductive layers are provided at both ends of the insulating substrate, and the conductive layers are located between the insulating substrate and the signal pillars.

6. The conductive filler impedance testing device according to claim 1, characterized in that: The outer shielding body further includes a limiting portion, which is protrudingly provided on the outer side wall of the outer shielding body, and the signal shielding sleeve is positioned between the limiting portions of the two signal transmission conductors.

7. The conductive filler impedance testing device according to claim 6, characterized in that: The limiting portion is located in the middle of the outer shielding body, and the limiting portion and the outer shielding body are integrally formed.

8. The conductive filler impedance testing device according to claim 6, characterized in that: The signal shielding sleeve includes a first shielding sleeve and a second shielding sleeve, wherein the inner end portion of the second shielding sleeve is detachably connected to the inner end portion of the first shielding sleeve; The first shielding cylinder is sleeved on the outside of the outer shielding body of the signal transmission conductor, and the outer end of the first shielding cylinder abuts against the limiting portion of the signal transmission conductor; The second shielding cylinder is sleeved on the outside of the outer shielding body of the other signal transmission conductor, and the outer end portion of the second shielding cylinder abuts against the limiting portion of the other signal transmission conductor.

9. The conductive filler impedance testing device according to claim 8, characterized in that: The first shielding cylinder includes an integrally formed first connecting portion and a first protruding portion, the first connecting portion being sleeved on the outside of an outer shielding body of the signal transmission conductor, the outer end portion of the first connecting portion being in contact with a limiting portion of the signal transmission conductor, the inner end portion of the first connecting portion being protrudingly provided with the first protruding portion, and the first protruding portion being provided on the outside of the insulating substrate; The second shielding cylinder includes an integrally formed second connecting portion and a second protruding portion, the second connecting portion being sleeved on the outside of the outer shielding body of the other signal transmission conductor, the outer end portion of the second connecting portion being in contact with the limiting portion of the other signal transmission conductor, the inner end portion of the second connecting portion being protrudingly provided with the second protruding portion, and the second protruding portion being provided on the outside of the insulating substrate; The second protrusion is detachably mounted on the outside of the first protrusion.

10. The conductive filler impedance testing device according to claim 9, characterized in that: The first connection portion is threadedly connected to the outer shield of one of the signal transmission conductors, the second connection portion is threadedly connected to the outer shield of another of the signal transmission conductors, and the second protrusion is threadedly connected to the first protrusion.

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