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FR4 epoxy resin board, also known as FR-4 glass-reinforced epoxy laminate, is a widely used high-performance composite material with the following core properties:
1. Flame Retardancy: It meets the UL94 V-0 standard, featuring self-extinguishing performance that stops burning quickly after leaving the fire source.
2. Excellent Electrical Insulation: It has a dielectric constant (Dk) of 4.2-4.5 at 1GHz, low dielectric loss (Df ≤ 0.020), and near-zero water absorption, maintaining stable insulation performance in both dry and humid environments.
3. Outstanding Thermal Properties: Standard FR-4 has a glass transition temperature (Tg) of 130-140°C, while high-Tg variants can reach 170-180°C, with a decomposition temperature (Td) around 300-350°C, adapting to common reflow soldering processes.
4. High Mechanical Strength: With woven E-glass fiber as the reinforcing skeleton, it boasts a high strength-to-weight ratio, excellent dimensional stability, and good machinability, which can effectively support electronic components and resist impact and vibration.
5. Cost-effectiveness & Versatility: It balances comprehensive properties at a relatively low cost, becoming the dominant substrate material for more than 75% of global PCBs, and is also widely used in electrical insulation structural parts, jigs and other scenarios.
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