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.
|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|
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.
To prevent getting it wrong from the start, we have put together our design guidelines, to use as a checklist.