Detailed Introduction To The Production Process And Application Areas Of Electronic Cloth
Did you know? A seemingly ordinary piece of fiberglass cloth is actually a crucial material in AI servers, 5G base stations, and high-end PCBs. From quartz sand to terminal electronic devices, electronic cloth connects the core links of the electronics industry chain, and its performance directly determines signal transmission speed and equipment reliability. This article thoroughly explains the core logic of electronic cloth, from the entire production process, core performance, generational upgrades to end-user applications.
I. Production Process: From Raw Material Quartz Sand to Precision Substrate
The creation of electronic cloth is a relay race of precision manufacturing:
1. Raw Material Preparation: High-purity quartz sand and pyrophyllite are used as raw materials, melted at temperatures above 1600℃, and drawn through a platinum spinneret into ultra-fine electronic yarns with a single filament diameter ≤9μm, accounting for 50%-60% of the cost of electronic cloth.
2. Precision Weaving: The electronic yarn is warped and sized, then woven into raw fabric using a high-precision weaving machine. High-end models can achieve a weft density of 1000 threads/inch, with a fabric flatness error ≤2μm.
3. Key Post-Processing: The raw fabric undergoes fiber splitting and surface chemical treatment to improve resin wetting, ensuring the subsequent copper-clad laminate is bubble-free and does not delaminate.
4. Finished Product Inspection: Only products that pass rigorous testing for thickness, weight, dielectric properties, and surface defects can proceed to downstream applications.
II. Core Performance: Key Indicators Determining the PCB Industry
Electronic fabric is a crucial substrate for copper-clad laminates (CCLs). Two core performance characteristics determine the final product's value:
- Dielectric Properties (Dk/Df): Lower Dk results in faster signal transmission, while lower Df reduces signal loss. AI servers require Dk ≤ 3.5 and Df ≤ 0.0015, while ordinary consumer electronics only require Dk ≈ 4.8.
- Mechanical and Thermal Stability: Provides structural support for the PCB, withstands thermal shocks from -50℃ to 260℃, prevents warping and cracking, and ensures long-term equipment reliability.
III. Generational Upgrades: Material Leaps in the AI Era
Electronic cloth has completed four generations of iterations, and the trend towards high-end products is irreversible:
- Generation 1 E-glass cloth: Dk≈4.8, price 4-6 RMB/meter, used in home appliances and low-end mobile phones, accounting for 90% of the market.
- Generation 2 Low-Dk cloth: Dk≈4.2, price 30 RMB/meter, suitable for 5G base stations and mid-to-high-end servers.
- Generation 3 Ultra-Low-Dk cloth: Dk≈3.5, price 120 RMB/meter, used in AI servers and high-speed switches.
- Generation 4 Quartz cloth (Q cloth): SiO₂ purity ≥99.95%, Dk≈2.2, price over 500 RMB/meter, the ultimate material for 1.6T optical modules and Chiplet packaging.
IV. End-User Applications: Covering the Entire Electronics Industry Chain
Electronic cloth permeates all electronic scenarios through the chain of electronic cloth → CCL → PCB → terminal:
- AI Computing Power: High-end AI server PCBs have 20-30 layers, requiring 18-24 meters of Q-cloth per unit, with a value 5-8 times that of traditional servers.
- Communication Infrastructure: 5G/6G base station RF boards and high-speed PCBs in data centers rely on low-loss electronic cloth to ensure signal stability.
- Automotive Electronics: New energy vehicle ADAS and automotive radar PCBs require high heat resistance and low expansion electronic cloth.
- Advanced Packaging: IC substrates and chiplet packaging use Low-CTE cloth to solve the problem of thermal expansion matching.
The 7628 electronic cloth, a crucial substrate in the electronic information industry, is a key electronic cloth product driving the industry's shift from quantitative growth to qualitative improvement, driven by AI and high-speed communication. Understanding the production logic and performance boundaries of electronic cloth is essential to accurately grasping the opportunities for domestic substitution of high-end materials and industrial upgrading.
