5G

Every laminate material discussed in this series so far — standard FR4, High-Tg FR4, polyimide — shares a common selection logic. You choose among them based on thermal performance, mechanical requirements, and environmental resistance. Electrical properties rarely drive the decision because at the frequencies where these materials are used, the differences are manageable. PTFE-based laminates exist in a different category entirely. They are selected primarily for their electrical properties — specifically their ability to transmit high-frequency signals with minimal loss and maximum dimensional consistency.