PCB Materials Selection Guide: Isola, Rogers & FR4 Laminates by Frequency
A materials selection hub for high-speed and RF PCB design — compare Isola, Rogers and FR4 laminates by operating frequency, dielectric loss and application, with links to in-depth guides.
Choosing a PCB laminate is a trade-off between electrical performance, thermal reliability, manufacturability and cost. Use the guides below to move from your operating frequency and loss budget to a specific material family. This hub only points you to the right in-depth article — it does not repeat their content.
How to decide
- Dielectric constant (Dk) and loss (Df) — the primary drivers of impedance and insertion loss.
- Operating frequency — standard FR4 up to a few GHz, low-loss and RF laminates beyond.
- Thermal class (Tg / Td) — reliability under reflow, thermal cycling and high-power loads.
- Application and manufacturability — cost, availability and stackup constraints.
Material selection guides
Selecting Isola materials by operating frequency
A decision framework matching FR408HR through Astra MT77 to each frequency band.
OverviewIsola laminate product line overview
How FR408, 370HR, I-Speed, I-Tera MT40 and Astra MT77 fit into the material stack.
High-speed digitalI-Speed vs I-Tera MT40 for 5G and AI
Dk/Df, signal integrity and cost trade-offs for high-speed switching designs.
mmWave / RFAstra MT77 for 77 GHz mmWave radar
Antenna substrate selection, stackup and impedance control at 77 GHz.
RF / microwaveHigh-frequency material selection and design
Key parameters and Rogers/PTFE comparisons for 5G and radar applications.
FR4 vs RogersFR4 vs Rogers substrate selection
When standard FR4 is enough and when an RF laminate is worth the cost.
Automotive / high-TgIsola 370HR for automotive PCB
High-Tg, CAF resistance and thermal-cycling reliability for ADAS/BMS/ECU.
Ready to build with these materials?
We fabricate high-frequency, impedance-controlled and multilayer PCBs on Isola and Rogers laminates. Talk to our engineers about your stackup.