Rigid Flex Circuits

Rigid Flex circuits are characterized by having conductors on both the flexible and rigid layers of the circuit. Plated through-holes extend between the flexible and rigid sections and electrically connect multiple conductor layers. This circuit construction is known as a Type 4 circuit as defined by IPC 6013 and should be distinguished from a flexible circuit with a rigid stiffener attached.

When to use Rigid Flex
  • If high density is required 
  • Dual sided components are necessary
  • When controlled impedance is required


Rigid Flex Features
  • Up to 8 layers 
  • Three dimensional capabilities create optimal solutions, especially when extreme space limitations exist
  • Assembly in final product is easier in comparison with flex boards
  • Maximizes space by reducing the need for interconnects between individual rigid boards

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