A high-speed signal transmission cable

Abstract

The present invention relates to a high-speed signal transmission cable, belonging to the technical field of chip testing devices. It is characterized in that it includes a cable bundle and at least one connector module, wherein the cable bundle is composed of multiple groups of coaxial cables and a tube sleeve wrapped outside the coaxial cables, the connector module includes a spring pin, a spring sleeve, a kit base and a signal conversion block, the kit base is a step-shaped component with a central protrusion and an array of through holes arranged at the protrusion, the bottom of the kit base has a depression corresponding to the central protrusion, a through hole corresponding to the position of the through hole of the kit base is opened on the signal conversion block, and the two corresponding through holes are connected to each other after being embedded in the depression of the kit base, the spring sleeve is sleeved outside the spring pin, and the tail of the spring pin passes through the through holes of the kit base and the signal conversion block and is welded to the signal line or ground line at one end of the coaxial cable. The present invention solves the problem that the signal transmission cable is susceptible to interference and single-end uncontrollable under high frequency conditions, and can significantly improve the signal transmission quality.

Description

Technical Field

[0001] The invention relates to a high-speed signal transmission cable, belonging to the technical field of chip testing devices. Background Art

[0002] Chip automatic test equipment (ATE) is usually used in the field of chip manufacturing to test the logic of the manufactured chips to ensure that the performance of the chips meets the design requirements. Currently, in such equipment, high-speed cables consisting of multiple sets of coaxial cables and spring pin modules are usually used to transmit signals. The two ends of the coaxial cables are stripped to separate the signal wires and the ground wires, which are respectively welded to the spring pin modules, and then epoxy resin is poured into the welds for protection and isolation. However, this approach has the following disadvantages:

[0003] 1. The welding between the cable and the spring pin destroys the impedance environment, which can easily cause a sudden change in the signal at this location and is greatly affected by the welding process and the level of the workers.

[0004] 2. Since each pair of spring pins is welded to the same coaxial cable, the high-speed signals transmitted by the cable core are independent of each other, and the GND is not short-circuited to a plane at the front spring pin module. The loop current of each signal can only return to the ATE along the ground probe paired with it, which is not the optimal ground loop. There is no GND surrounding the signal for shielding, which can easily cause signal instability and attenuation, and it is impossible to ensure that the signal is transmitted within the single-ended ±10% range.

[0005] 3. When the tail of the array's spring pin module is welded to the cable, it is easy to cause circuit breakage and deformation when supported only by the solder joints of the spring pin and the coaxial line due to the lack of additional auxiliary structure. Summary of the invention

[0006] The present invention provides a high-speed signal transmission cable, which can effectively reduce the attenuation and mutation of high-frequency signal transmission process and reduce the risk of disconnection and deformation.

[0007] Technical solution:

[0008] A high-speed signal transmission cable, characterized in that it includes a cable bundle and at least one connector module, wherein the cable bundle is composed of multiple groups of coaxial cables and a tube sleeve wrapped around the coaxial cables, the connector module includes a spring pin, a spring sleeve, a kit base and a signal conversion block, the kit base is a stepped component with a central protrusion and an array of through holes arranged at the protrusion, the bottom of the kit base has a depression corresponding to the central protrusion, a through hole corresponding to the position of the through hole of the kit base is opened on the signal conversion block, and the two corresponding through holes are connected to each other after being embedded in the depression of the kit base, the spring sleeve is sleeved outside the spring pin, and the tail of the spring pin passes through the through holes of the kit base and the signal conversion block and is welded to the signal line or ground line at one end of the coaxial cable.

[0009] Furthermore, at least one bolt through hole is provided on each side of the central protrusion of the kit base, and is fixedly connected to other equipment by bolts.

[0010] Furthermore, the internal resistance of the coaxial cable is 50-75 ohms, the casing is a soft rubber tube, and a plurality of cross-shaped plastic frames are arranged inside the casing to separate and protect the coaxial cable.

[0011] Furthermore, both ends of the coaxial cable are connected to the connector module, and a mold is used to inject epoxy resin glue at the welding connection between the tail of the spring pin and the coaxial cable to form a solid protective layer and unify the impedance of each coaxial cable welding point.

[0012] Furthermore, one end of the coaxial cable is connected to the connector module, and a mold is used to inject epoxy resin glue at the welding connection between the tail of the spring pin and the coaxial cable to form a solid protective layer and unify the impedance of each coaxial cable welding point. The other end is directly connected to the device or other types of interfaces as needed.

[0013] Furthermore, the through holes in the signal conversion block are divided into insulating holes and grounding holes. The spring pin inserted into the grounding hole is a grounding probe, and the spring pin inserted into the insulating hole is a signal probe. The insulating holes and the grounding holes are spaced apart from each other, and each insulating hole is surrounded by grounding holes. Each signal probe is surrounded by 4 grounding probes with a common ground, so that the signal is not easily interfered with. The inner diameter of the grounding hole is consistent with the outer diameter of the tail of the spring pin, and the grounding holes are interconnected. The inner diameter of the insulating hole is slightly larger than the outer diameter of the tail of the spring pin, so that the glue can flow smoothly into it when pouring glue.

[0014] Furthermore, the signal conversion block is a multi-layer PCB board, wherein the grounding holes are copper-plated and are interconnected through a layer of the PCB board.

[0015] Furthermore, the signal conversion block is a whole piece of conductive metal, the spring pin passing through the grounding hole is in close contact with the grounding hole, and is connected to each other through the conductive metal to form a grounding grid, the spring pin passing through the insulating hole does not contact the insulating hole, and the gap between the two is insulated by injected epoxy resin glue.

[0016] Beneficial effects:

[0017] 1) The present invention sets a signal conversion block to ensure that the grounds between coaxial cables are interconnected to form an optimal grounding loop, thereby solving the problem that high-speed transmission cables are easily interfered with and uncontrollable at a single end under high frequency conditions, and can significantly improve the signal transmission quality of high-speed signal lines.

[0018] 2) By setting the grounding hole and the insulating hole of the signal conversion block, ensure that each signal probe is surrounded by four grounding probes to form a shield.

[0019] 3) The signal conversion block enables the welding of the spring pin and the coaxial cable to be done by machine, and reduces the requirements on the workers' skills during manual welding.

[0020] 4) The signal conversion block forms a support point to improve the mechanical strength, which can avoid the disadvantage of the spring probe being easy to deform without support. After epoxy resin is poured, it can ensure that the welding point between the spring needle and the coaxial cable is firm and not easily damaged, and form a unified impedance environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the high-speed signal transmission cable of the present invention;

[0022] Figure 2 is a structural diagram of a connector module;

[0023] Figure 3 This is a schematic diagram of the structure on the back of the kit base;

[0024] Figure 4 This is a schematic diagram of the signal conversion block embedded in the back of the kit base;

[0025] Among them: 1 is a connector module, 11 is a kit base, 111 is a spring sleeve, 112 is a spring pin, 12 is a bolt, 13 is a signal conversion block, 131 is a grounding hole, 132 is an insulating hole, 14 is a bolt through hole, 2 is a cable bundle, and 21 is a coaxial cable. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments:

[0027] like Figures 1 to 3 As shown, a high-speed signal transmission cable includes a cable bundle 2 and at least one connector module 1, wherein the cable bundle 2 is composed of multiple groups of coaxial cables 21 and a tube sleeve wrapped around the coaxial cables, the connector module 1 includes a spring pin 112, a spring sleeve 111, a kit base 11 and a signal conversion block 13, the kit base 11 is a step-shaped component with a central protrusion and an array of through holes arranged at the protrusion, and the bottom of the kit base 11 has a depression corresponding to the central protrusion, and the signal conversion block 13 is provided with a through hole corresponding to the position of the through hole of the kit base 11. After being embedded in the depression of the kit base 11, the corresponding through holes of the two are connected to each other, and the spring sleeve 111 is sleeved on the outside of the spring pin 112. The tail of the spring pin 112 passes through the through holes of the kit base 11 and the signal conversion block 13 and is welded to the signal line or ground line at one end of the coaxial cable 21.

[0028] At least one bolt through hole 14 is formed on each side of the central protrusion of the kit base 11 , and is fixedly connected to other equipment via bolts 12 .

[0029] The internal resistance of the coaxial cable 21 is 50-75 ohms. The casing is a soft rubber tube. A plurality of cross-shaped plastic frames are arranged inside the casing to separate and protect the coaxial cable 21 .

[0030] Both ends of the coaxial cable 21 are connected to the connector module 1, and epoxy resin glue is poured into the welding connection between the tail of the spring pin 112 and the coaxial cable 21 using a mold to form a solid protective layer.

[0031] One end of the coaxial cable 21 is connected to the connector module 1, and a mold is used to inject epoxy resin glue at the welding connection between the tail of the spring pin 112 and the coaxial cable 21 to form a solid protective layer. The other end is directly connected to the device or other types of interfaces as needed.

[0032] like Figure 4 As shown, the through holes in the signal conversion block 13 are divided into insulating holes 132 and grounding holes 131. The insulating holes 132 and the grounding holes 131 are spaced apart from each other. Each insulating hole 132 is surrounded by grounding holes 131. The inner diameter of the grounding hole 131 is consistent with the outer diameter of the tail of the spring pin 112. The grounding holes 131 are interconnected, and the inner diameter of the insulating hole 132 is slightly larger than the outer diameter of the tail of the spring pin 112.

[0033] The signal conversion block 13 is a multi-layer PCB board, wherein the grounding holes are copper-plated and are interconnected through a layer of PCB board.

[0034] The signal conversion block 13 is a whole piece of conductive metal. The spring pin 112 passing through the grounding hole 131 is in close contact with the grounding hole 131 and is connected to each other through the conductive metal to form a grounding grid. The spring pin 112 passing through the insulating hole 132 does not contact the insulating hole 132, and the gap between the two is insulated by injected epoxy resin glue.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the principles and spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-speed signal transmission cable, characterized in that: The invention comprises a cable bundle (2) and at least one connector module (1), wherein the cable bundle (2) is composed of a plurality of groups of coaxial cables (21) and a tube sleeve wrapped around the coaxial cables, and the connector module (1) comprises a spring pin (112), a spring sleeve (111), a kit base (11) and a signal conversion block (13), wherein the kit base (11) is a step-shaped component with a central protrusion and array-arranged through holes at the protrusion, and the bottom of the kit base (11) has a depression corresponding to the central protrusion, and the signal conversion block (13) is provided with a through hole corresponding to the position of the through hole of the kit base (11), and the two corresponding through holes are connected to each other after being embedded in the depression of the kit base (11), and the spring sleeve (111) is sleeved outside the spring pin (112), and the tail of the spring pin (112) passes through the through holes of the kit base (11) and the signal conversion block (13) and is welded to the signal line or ground line at one end of the coaxial cable (21).

2. The high-speed signal transmission cable according to claim 1, wherein: At least one bolt through hole (14) is provided on each side of the central protrusion of the kit base (11), and is fixedly connected to other equipment via bolts (12).

3. The high-speed signal transmission cable according to claim 1, wherein: The internal resistance of the coaxial cable (21) is 50-75 ohms, the sleeve is a soft rubber tube, and a plurality of cross-shaped plastic frames are arranged inside the sleeve for separating and protecting the coaxial cable (21).

4. The high-speed signal transmission cable according to claim 1, wherein: Both ends of the coaxial cable (21) are connected to the connector module (1), and epoxy resin glue is poured into the welding connection between the tail of the spring pin (112) and the coaxial cable (21) using a mold to form a solid protective layer.

5. The high-speed signal transmission cable according to claim 1, wherein: One end of the coaxial cable (21) is connected to the connector module (1), and epoxy resin glue is poured into the welding connection between the tail of the spring pin (112) and the coaxial cable (21) using a mold to form a solid protective layer. The other end is directly connected to a device or other types of interfaces as needed.

6. The high-speed signal transmission cable according to claim 1, wherein: The through holes in the signal conversion block (13) are divided into insulating holes (132) and grounding holes (131). The insulating holes (132) and the grounding holes (131) are spaced apart from each other. Each insulating hole (132) is surrounded by grounding holes (131). The inner diameter of the grounding hole (131) is consistent with the outer diameter of the tail of the spring pin (112). The grounding holes (131) are interconnected. The inner diameter of the insulating hole (132) is slightly larger than the outer diameter of the tail of the spring pin (112).

7. The high-speed signal transmission cable according to claim 6, characterized in that: The signal conversion block (13) is a multi-layer PCB board, wherein the grounding holes are copper-plated and are interconnected through a layer of PCB board.

8. The high-speed signal transmission cable according to claim 6, wherein: The signal conversion block (13) is a whole piece of conductive metal. The spring pin (112) passing through the grounding hole (131) is in close contact with the grounding hole (131) and is connected to each other through the conductive metal to form a grounding grid. The spring pin (112) passing through the insulating hole (132) does not contact the insulating hole (132), and the gap between the two is insulated by injecting epoxy resin glue.

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