Rigid Flex and Flex

SUMMARY

  • Up to 16 layers Rigid flex
  • Sequential laminations
  • HDI up to 8 layers
  • Flex with Air Gap

rigid-flex

FLEX CIRCUITS

  • Flex are in use since the 50s
  • The Flex is an insulating Polymer and a layer of Copper for circuitry
  • 1- 6 layers 0.5oz – 1 Oz copper
  • Multiple Stiffener per circuit
  • Etching and plating constraints are similar to Rigid PCBs

 flex1

DESIGN CONSIDERATIONS

  • Traces should be perpendicular to bend axis
  • Keep trace corners, width changes and via out of bend area
  • Thick copper traces if possible
  • Fillet pads

RIGID FLEX VS FLEX WITH STIFFENER
Altus Rigid Flex 2016-27

 

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