Flex PCB Substrate Materials Beyond Polyimide: PET, PEN, LCP, PTFE, PEI, and PEEK
PET vs PEN, LCP, PTFE/fluoropolymers, and specialty films like PEI/PEEK: when each wins, where each struggles, and what it means for manufacturingPolyimide is the baseline substrate for most flex circuits because it offers a strong mix of heat tolerance, mechanical durability, and manufacturability. But some flex designs have requirements...