Choosing the right PCB material impacts performance, reliability, and cost.
Common PCB Materials
- FR-4: Standard fiberglass epoxy. Tg 130-180°C. Good for most applications.
- High-Tg FR-4: Tg >170°C. Better for lead-free soldering and high-temperature use.
- Rogers: Low dielectric loss. Ideal for RF/microwave applications.
- Polyimide: High temperature resistance. Used in aerospace and military.
- Aluminum: Metal-core for LED and power applications (heat dissipation).
- Flex Materials: Polyimide film for flexible and rigid-flex PCBs.
Key Parameters
- Tg (Glass Transition Temperature): Higher = better thermal performance
- Dk (Dielectric Constant): Lower = better for high-frequency signals
- Df (Dissipation Factor): Lower = less signal loss
- CTE (Coefficient of Thermal Expansion): Lower = better dimensional stability
HUAXING stocks FR-4, High-Tg, Rogers, and aluminum substrates. Contact us for material recommendations.