4.1 Dielectric Constant
Characteristics: The typical value is 2.17 at 10GHz, with a tolerance of ±0.04.
Advantages: The low dielectric constant reduces signal loss. The small tolerance ensures consistent performance, reducing the problem of inconsistent insertion loss during production.
4.2 Loss Tangent
Characteristics: The typical value is 0.001 at 10GHz and 0.0014 at 20GHz.
Advantages: The low loss tangent minimizes energy loss during signal transmission, reduces signal attenuation, and decreases insertion loss. This is especially advantageous in high - frequency scenarios.
4.3 Thermal Performance
Characteristics: The temperature coefficient of the dielectric constant is -150 PPM/°C in the range of -55°C to 150°C.
Advantages: The stable temperature coefficient of the dielectric constant ensures the stability of the dielectric constant during temperature changes, indirectly maintaining the low - insertion - loss performance.
4.4 Electrical Performance
Characteristics: The volume resistivity is ≥6×10⁶ MΩ·cm and the surface resistivity is ≥1×10⁶ MΩ under standard conditions; the electrical strength in the Z - direction is >23 KV/mm and the breakdown voltage in the XY - direction is >30 KV (at 5kW, 500V/s).
Advantages: High resistivity reduces leakage current, avoiding additional signal energy loss. High electrical strength ensures the reliability of the PCB, safeguarding signal integrity and indirectly contributing to low insertion loss.
4.5 Peel Strength
Characteristics: The peel strength of 1 OZ F4BM217 is >1.8 N/mm.
Advantages: High peel strength ensures a firm connection between the copper foil and the substrate, maintaining stable signal transmission and reducing fluctuations in insertion loss. |
