See why Si3N4 ceramic PCB is chosen for many high-power modules: bending strength, thermal-cycle life, cost trade-offs and fit for SiC or IGBT designs.
Your circuit board exceeds safe operating temperatures because standard FR4 substrates cannot dissipate heat faster than high-power components generate it,...
Plan ceramic RF PCBs with impedance control, via transitions, edge coupling and DFM checks for AlN and alumina layouts at microwave and 5G frequencies.