Semi-flex PCBs often can function as a more than adequate solution for certain more advanced applications, while manufacturing is less complicated. Often, it’s a way that combines the best of both worlds. You can bend the board one time to fit the finished product, while not complicating things unnecessarily by laying on a higher level of technology than necessary.
You can always contact your local NCAB Group company if you need further information or assistance, we are happy to help you.
Semi-Flex PCB – Technical specification
|Feature||NCAB´s technical specifcation|
|Number of layers||1 – 12 layers, with 1 – 2 conductive layers in bending area.|
|Technology highlights||The process uses controlled depth routing of the FR-4 to achieve a flexible / bending section within a traditionally rigid FR-4. Only suitable for static operations – bends typically just for installation. A lower cost solution for some very specific “flex-to-fit”applications.|
|Bending performance||50 x bend cycles of 0° – 90° – 0°|
|Bend features||5mm radius / max bending angle 90°|
|Materials||Specialized FR-4 for static flex applications|
|Copper weights (finished)||35μm|
|Minimum track and gap||0.075mm / 0.075mm|
|PCB thickness||1.00mm – 2.00mm|
|PCB thickness in flex section||0.25mm ± 0.05mm|
|Maxmimum dimensions||538mm x 610mm|
|Surface finishes available||HASL (SnPb), LF HASL (SnNiCu), OSP, ENIG, Immersion tin, Immersion silver, Electrolytic gold, Gold fingers|
|Minimum mechanical drill||0.20mm|
What is the difference between semi-flex and rigid flex?
Semi-flex is effectively a ‘standard’ multilayer PCB, built using specific types of FR4 that has been depth to a specific tolerance so that the resulting thinner area provides a flexible / bending section of the traditionally rigid FR4. Semi-flex is suitable for static applications (flex to install), or with very limited number of bends.
Download our design guidelines for Semi-Flex PCBs
To prevent getting it wrong from the start, we have put together our design guidelines, to use as a checklist.