PCIE5 high-frequency high-speed transmission wire

Abstract

The utility model belongs to high frequency high speed signal transmission technical field especially for a kind of PCIE5 high frequency high speed transmission wire rod, including PCB board, signal transmission unit and reinforcing structure, signal transmission unit is made of four conductors, and the conductor outside is successively covered with skin film and ring package shielding layer;The both ends of signal transmission unit are welded on PCB board to form integral structure, and the welding part of PCB board and signal transmission unit is formed reinforcing structure by high frequency UV glue point gluing.The utility model, by single group signal transmission unit independent shielding design, significantly reduce the influence of crosstalk to signal PIN, improve high frequency signal transmission integrity, welding process is combined with high frequency UV glue reinforcement, effectively prevent the fracture of connecting point due to external force, improve wire rod service life, wire rod total length can be adjusted as required, adapt to the installation space demand of different equipment, applicable to server, display screen and other strict requirements of high frequency high speed signal transmission equipment.

Description

Technical Field

[0001] This utility model relates to the field of high-frequency and high-speed signal transmission technology, specifically a PCIE5 high-frequency and high-speed transmission cable. Background Technology

[0002] As electronic devices evolve towards higher frequencies and higher speeds, the performance requirements for signal transmission cables are increasing. For example, servers, displays, and other devices need to transmit high-frequency, high-speed signals. Traditional cables suffer from the following drawbacks: severe crosstalk interference during signal transmission, leading to decreased signal integrity; the connection between the cable and the PCB is easily broken by external forces; and the fixed cable length cannot adapt to the installation needs of different devices. Therefore, there is an urgent need for a high-frequency, high-speed transmission cable that can solve these problems. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a PCIE5 high-frequency high-speed transmission cable, which solves the problems of large crosstalk interference, low connection reliability, and non-adjustable length of existing high-frequency transmission cables.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] A PCIE5 high-frequency high-speed transmission cable includes a PCB board, multiple signal transmission units, and a reinforcement structure;

[0008] Each signal transmission unit consists of four conductors, with an insulating film and a ring-shaped or attached shielding layer covering the outside of the conductors. The ring-shaped shielding layer is made of metal shielding material, which can effectively isolate a single signal from external interference.

[0009] Multiple signal transmission units are fixed to the PCB board by soldering to form an overall signal transmission path;

[0010] High-frequency UV adhesive is applied to the weld joint, and after curing, it forms a reinforced structure to prevent breakage under stress and ensure the stability of the high-frequency effect.

[0011] The total length of the wire can be cut and adjusted according to actual needs.

[0012] Furthermore, a method for preparing the wire is also provided, comprising the following steps:

[0013] Fabrication of the signal transmission unit: Four conductors made of highly conductive materials are wrapped with an insulating film, and then wrapped with a ring or attached shielding material to form an independent shielding layer;

[0014] Combined soldering: Multiple signal transmission units are soldered onto the PCB board according to a preset layout to ensure the signal transmission path is conductive;

[0015] Reinforcement treatment: Apply high-frequency UV adhesive to the weld joints and cure with ultraviolet light to form a high-strength reinforcement layer;

[0016] Cutting and Adjustment: Cut the wire to the total length according to customer requirements to complete the finished product preparation.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a PCIE5 high-frequency high-speed transmission cable, which has the following beneficial effects:

[0019] This invention significantly reduces the impact of crosstalk on signal pins through an independent shielding design for a single signal transmission unit, thereby improving the integrity of high-frequency signal transmission. The welding process combined with high-frequency UV adhesive reinforcement effectively prevents connection points from breaking due to external forces, extending the service life of the cable. The total length of the cable can be adjusted as needed to adapt to the installation space requirements of different devices. It is suitable for servers, displays, and other devices with strict requirements for high-frequency and high-speed signal transmission. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the PCB board structure in this utility model;

[0022] Figure 3 This is a cross-sectional structural diagram of the signal transmission unit in this utility model.

[0023] In the diagram: 1. PCB board; 2. Signal transmission unit; 201. Conductor; 202. Sheath; 203. Ring shielding layer; 3. Reinforcement structure. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example

[0026] like Figure 1 , Figure 2 and Figure 3As shown, one embodiment of this utility model proposes a PCIE5 high-frequency high-speed transmission cable, including a PCB board 1, multiple signal transmission units 2, and a reinforcement structure 3;

[0027] Each signal transmission unit 2 consists of four conductors 201. The conductors 201 are covered with an insulating film 202 and a ring-shaped or attached shielding layer 203 in sequence. The ring-shaped shielding layer 203 is made of metal shielding material, which can effectively isolate a single signal from external interference.

[0028] Multiple signal transmission units 2 are fixedly connected to the PCB board 1 by a soldering process to form an overall signal transmission path;

[0029] High-frequency UV adhesive is applied to the weld joint, and after curing, it forms a reinforced structure 3 to prevent breakage under stress and ensure the stability of the high-frequency effect.

[0030] The total length of the wire can be cut and adjusted according to actual needs.

[0031] Specifically, in the PCIe 5 high-frequency high-speed transmission cable, each signal transmission unit 2 consists of four copper conductors 201.

[0032] The conductor 201 is covered with a polyimide film 202, and the outer layer is an aluminum foil ring shielding layer 203.

[0033] Among them, conductor 201: uses oxygen-free copper wire with a diameter of 0.15mm and a conductivity of ≥99.95% to ensure low-loss transmission of high-frequency signals;

[0034] 202 film: The insulating layer is made of 0.08mm thick fluoroethylene propylene copolymer, with a dielectric constant ≤2.1 and a temperature range of -65℃ to 200℃;

[0035] Circular shielding layer 203: It is made of aluminum-plastic composite tape with a thickness of 0.05mm and an aluminum layer thickness of 0.012mm. It is spirally wound around the outer layer of the membrane 202 with a 30% overlap rate to form an independent shielding space.

[0036] PCB board 1: Made of FR-4 material, 1.6mm thick, gold-plated surface, gold layer thickness is 0.8μm, pad diameter is 1.2mm;

[0037] High-frequency UV adhesive: Modified acrylic adhesive of model DS-UV6000 is selected, with a dielectric constant of 3.2 (at 10GHz) and a Shore hardness of 85D after curing.

[0038] A method for preparing the wire is also provided, including the following steps:

[0039] Signal transmission unit 2 preparation: Four oxygen-free copper wire conductors 201 are arranged in parallel, and a film 202 with a fluorinated ethylene propylene copolymer insulation layer is coated by an extrusion process to form a single wire core;

[0040] Subsequently, the four wire cores are brought together and an automatic winding machine is used to spirally wind the aluminum-plastic composite tape at a speed of 300 rpm, with the winding tension controlled at 5N. This forms a ring-shaped shielding layer 203 around the four brought-together wire cores, creating an independently shielded signal transmission unit. The outer diameter of a single unit is 1.2mm ± 0.05mm.

[0041] Combined soldering: Arrange the four signal transmission units in parallel with a spacing of 1.5mm, and use laser positioning with a positioning accuracy of ±0.02mm to align them with the pads on PCB board 1;

[0042] Using hot air welding, with a welding temperature of 320℃±5℃ and a welding time of 2s, the wire core is connected to the pad. The diameter of the weld point formed after welding is ≤1.8mm, with no incomplete welding or bridging.

[0043] Reinforcement treatment: Apply DS-UV6000 adhesive to the welding point area using a dispensing machine. The adhesive layer should be 3mm in diameter and 0.5mm thick.

[0044] UV curing machine with a wavelength of 365nm and a power of 800mW / cm 2 Irradiate for 15 seconds to complete curing and form reinforced structure 3. The shear strength of the adhesive layer after curing is ≥15MPa.

[0045] After production is completed, the total length of the cable is cut to 800mm according to the server equipment requirements, with a tolerance of ±2mm. The following performance tests are then performed on the finished product:

[0046] 1. Signal integrity test: At 32GHz frequency, insertion loss ≤ -3dB, return loss ≥ -15dB, crosstalk attenuation ≥ -40dB (between adjacent groups);

[0047] 2. Mechanical performance test: Apply a 10N axial tensile force to the wire for 30 seconds. No solder joints should fall off and no wire core should break.

[0048] 3. Environmental test: After 100 cycles of cold and hot cycling from -40℃ (4h) to 25℃ (30min) to 125℃ (4h) to 25℃ (30min), the electrical performance was normal.

[0049] This cable product, through precise control of material parameters and process conditions, reduces signal transmission loss to -3dB@32GHz with the aluminum foil shielding layer, and increases the tensile strength of the connection point to 50N after UV adhesive reinforcement, achieving stable transmission of 32GHz high-frequency signals. It is suitable for PCIe 5.0 interface connection of high-density servers and can meet the transmission bandwidth requirement of 32GB per second.

[0050] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A PCIE5 high-frequency high-speed transmission cable, comprising a PCB board (1), a signal transmission unit (2), and a reinforcement structure (3), characterized in that: The signal transmission unit (2) consists of four conductors (201), and the conductors (201) are covered with a membrane (202) and a ring-shaped or attached shielding layer (203) in sequence. Both ends of the signal transmission unit (2) are soldered onto the PCB board (1) to form an integral structure. The soldering points of the PCB board (1) and the signal transmission unit (2) are reinforced by high-frequency UV glue to form a reinforced structure (3).

2. The PCIe 5 high-frequency high-speed transmission cable according to claim 1, characterized in that: Each set of high-frequency and high-speed lines is shielded by a ring-shaped shielding layer (203) to isolate crosstalk interference between adjacent signal transmission units (2).

3. The PCIe 5 high-frequency high-speed transmission cable according to claim 1, characterized in that: The conductor (201) is a highly conductive material, and the film (202) is an insulating material layer.

4. The PCIe 5 high-frequency high-speed transmission cable according to claim 1, characterized in that: The PCB board (1) is fixedly connected to the signal transmission unit (2) through a welding process. High-frequency UV glue covers the welding point to form a reinforced structure (3) to prevent breakage under stress and to ensure the stability of the high-frequency effect.

Images