In the field of electronic products where high-frequency and high-speed signal transmission is increasingly prevalent, micro coaxial cable has become the preferred connection solution for high-precision equipment such as camera modules, vehicle imaging systems, and notebook display modules. However, engineers often encounter issues with the cracking of the shielding layer of the cable assembly in practical applications, which not only affects signal stability but also reduces product reliability. This article takes the I-PEX 20634-140T-02 connector as an example to analyze the main reasons for the cracking of the shielding layer of micro coaxial cables in use and provides effective protection suggestions.
What is the I-PEX 20634-140T-02?
I-PEX 20634-140T-02 is a 0.4mm pitch, 40Pin ultra-fine pitch connector that supports high-speed differential signal transmission. The connector is widely used in scenarios such as high-end laptops, AR/VR devices, and industrial cameras. Used in conjunction with micro coaxial cable of AWG40/42/44 grade, it can achieve high-density wiring and high-speed stable signal transmission, and is a commonly used micro-coaxial connection solution in the market.
Two, common causes of shielding layer cracking
Overextension or pulling causes metal fatigue
The shielding layer of extremely thin coaxial cables (such as tin-plated copper braid) is thin. If it is repeatedly bent or subjected to excessive force during installation or use, the metal wire is prone to breakage, thereby causing cracking.
Connector welding process is not proper
During welding at the I-PEX 20634-140T-02 terminal, if the temperature control is not accurate or the pressure is too great, it may cause indentation or micro-cracks on the shielding layer,埋下开裂隐患.
Material selection mismatch
Not all micro coaxial cables are suitable for high-speed connectors. If the shielding layer material is fragile or lacks fatigue resistance, it is prone to breakage in vibration or temperature changes.
External force injury or insufficient assembly space
Insufficient space in harness design can cause wire materials to be compressed or clamped, accelerating the aging of the shielding layer and even causing it to rupture directly.
Three, protective measures for cracking of shielding layer
Select high flexibility and bend-resistant micro coaxial cable material
Optimize the connector welding process to avoid high temperature concentration and uneven pressing
Reserve sufficient cable space in structural design
Increase the buffer structure or protective tube to reduce the impact of external mechanical stress on the shielding layer.
Micro coaxial cable plays an increasingly important role in high-precision electronic equipment, and the selection of matching connectors and the process treatment are becoming more and more critical. Although the cracking of the shielding layer is a "small problem," it may lead to "big hazards" such as signal distortion and product failure. I hope the analysis and suggestions in this article can provide reference and guidance for you when developing the I-PEX 20634 series products.
We have been focusing on the design and customization of high-speed cable harnesses and ultra-fine coaxial cables for a long time, committed to providing stable and reliable high-speed interconnect solutions. If you have any related needs or would like to learn more, please feel free to contact: Yin Manager.
18913280527 (WeChat number)。
