What are rigid PCBs made of?

Master rigid PCB durability, cost-saving design strategies, material choices & signal integrity for high-speed applications. Choose wisely vs. rigid-flex PCBs.
What is the maximum thickness of copper in PCB?

Choose PCB copper weight wisely: use 1-3oz for standard boards, 4-12oz heavy copper for high-power/heat, and 12-20oz for extreme applications. Design tips included.