We can also reduce the impact of PCB expansion and contraction in many ways, such as:
1. Choose materials with low expansion coefficient: Using materials with low thermal expansion coefficient can reduce the expansion effect.
2. Control the stacking mode of boards: reasonably design the hierarchical structure and stacking mode of PCB to balance the expansion and contraction of different levels.
3. Add compensation structure: Add compensation structure, such as compensation hole or shape, in the design of PCB to offset the size change caused by expansion and contraction.
4. Control the thickness of PCB: Controlling the thickness of PCB can affect its expansion and contraction performance.
