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Rigidizers & Stiffeners

Often circuit applications require support in areas where connectors
or other components are applied. Here are the recommended types of
guidelines for stiffeners.

FR4/G10 Stiffeners:

  • Come in a variety of thickness' from .010" (.25mm), .020" (.50mm), .031" (.78mm), .047" (1.19mm) and .062" (1.57mm).
  • Can be bonded to a flex circuit using a pressure sensitive adhesive or a thermal set adhesive.
  • Are normally used to give added rigidity under a connector area.
  • Used as a carrier panel for automated assembly processing.
  • Hole size in the stiffener should be .015" (.38mm) larger than the circuit thru-hole to allow for registration tolerances.

    • Polyimide or polyester stiffeners:

  • Come in a variety of thickness' from .001" (.02mm) up to .015" (.38mm).
  • Can be bonded to a flex circuit using a pressure sensitive adhesive or a thermal set adhesive.
  • Can be used to give added thickness under conductor fingers to meet ZIF connector requirements.
  • Can be used to give added strength in high wear areas.
  • Can be blanked at the same time as the circuit outline to meet tight tolerance requirements.

    • Location of stiffener:

  • Stiffener and coverlay termination points should overlap a minimum of .030" (.76mm) to avoid stress points. Eliminating stress points reduce the chance of traces breaking.

    • All Flex specializes in quickturn flexible circuitry design, fabrication, and assembly of flex circuits, multilayer flex pcbs, and single and double sided flexible pcbs. We provide engineering services for flexible circuit boards and value add services including mixed form factor flex circuit assembly of flexible circuits.
    © Copyright 2008 All Flex Acquisitions, LLC (d.b.a. All Flex), Flexible Circuit Manufacturer