Points To Note While Configuring Rigid Flex Circuit Boards

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Points To Note While Configuring Rigid Flex
Circuit Boards
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• A flex-rigid PCB contains both flexible and rigid
  board materials. In these components, the layers
  of flexible substrate remain attached to rigid
  boards by external or internal means. Flex-rigid
  PCBs provide more options to designs while
  eliminating the need for costly or unreliable
  connections between flexible and rigid
  substrates. Designing a rigid-flex PCB requires
  you to pay particular attention to the smallest
  of details. It is the best way to ensure the
  integrity of the PCB and the success of all the
  subsequent manufactured boards. Here are some of
  the design considerations that you or your
  manufacturing partner must address when creating
  rigid-flex board designs.

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Management of stacks

• Popular manufacturers of Rigid Flex Circuit
  Boards that you can reach via cplfpc suggest you
  inspect the stack-up of the PCB design. It should
  be a precise template for the finished item.
  Designers should use the appropriate software
  program to create rigid-flex layouts that work.
  If there is a flaw in the rigid-flex stack-ups or
  if inefficiently managed, then you will have to
  incur delays. You may also have to put up with
  performance-related issues.

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Ground-plane integrity

• Are you going to ask the manufacturers of Rigid
  Flex Circuit Boards from Capel Technology Co. Ltd
  to design dynamic-flex PCBs or flex-to-install
  PCBs? Dynamic-flex PCBs should be able to fold
  repeatedly whenever someone uses a device. On the
  other hand, flex-to-install PCBs should bend only
  when you place the PCB inside the gadget while
  assembling it.

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Managing the bends

• Trace routing is just one of the concerns to
  worry about when you carry ground planes or power
  on the flexible zones of PCBs. In situations such
  as these, surface-mounted pads and the
  through-holes also remain at risk in bends that
  fold repeatedly. That is why you must use
  additional cover lay for anchoring
  surface-mounted pads. Furthermore, you should
  through-hole plating to increase the overall
  durability of the PCB. Experts suggest you
  refrain from designing rigid-flex boards with
  components or vias close to the bends.

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Handling the traces

• While designing the traces, you should route them
  perpendicularly to the bending areas. Such a
  routing configuration will reduce the stress on
  the traces in rigid-flex PCBs. Another trick for
  you to use is to offset the traces on
  double-sided rigid-flex circuits. Once you
  stagger the traces on the top and bottom of a
  circuit, you will realize that the PCB gets
  stronger and it can withstand continuous bends
  with better consistency.

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