Flexable PCB Design considerations

Discussion in 'General Electronics Chat' started by longpole001, Feb 20, 2016.

  1. longpole001

    Thread Starter New Member

    Sep 16, 2014
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    0
    HI Guys , i have need to make a flexable pcb strip that hold IR sensors , the flexable pCB will be encased into fabric band that will need to flex ( 50mm raduis )
    I am aware that you can get stiffeners fitted and semi rigid flex pcb to be made as well ,


    Was wondering if any who have made flexable pcb , that have smd components mounted on the flex pcb , can advise on the robustness of using/ mounting components to a flex pcb ?

    Regards

    Sheldon
     
  2. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    1,571
    230
    I've done some work with flex, but typically fixed in place. Components don't flex. They require stiffening sufficient to resist flexation. Physically group components into locally stiffened areas, or 'segmented' stiffening to spread things out. Stiffeners range from an extra coverlay to rigid boards. Small components such as a 0603 or smaller should be ok if mounted perpendicular to flex plane, without stiffening.

    The best way is get some samples into a test environment. You may find other performance requirements become a higher priority
     
  3. longpole001

    Thread Starter New Member

    Sep 16, 2014
    29
    0
    What about using flex to jion to a normal pcb . any advice on the points of connection and mounting design
     
  4. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    1,571
    230
    Point of connection must be stress free. Ensure adequate strain relief.
     
  5. longpole001

    Thread Starter New Member

    Sep 16, 2014
    29
    0
    Ok thanks for ibfo ill talk to the pcb manufacture more about stifners under mounted componet

    Was considering uing a connector header pads in flex soldered direct to normal pcb. With strain relief
     
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