Wide-bandgap semiconductors switch fast enough that the PCB stops being a passive interconnect and becomes part of the circuit. A few nanohenries of stray inductance in the wrong loop turn into ringing, EMI or a failed prototype. This article covers what GaN and SiC actually demand of the board – heavy copper, insulated metal substrates, rigid-flex integration, disciplined loop layout – and the fabrication tolerances that determine whether the physical board behaves the way the simulation promised.
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Flex, Rigid-Flex, or Rigid: Matching the PCB to the Application
A practical primer on choosing between rigid, flexible, and rigid-flex PCB construction — driven by the mechanical envelope and reliability target.