General design tips

Designing a flex PCB is no different to designing a regular PCB in terms of how you go about designing it.


Avoid using right angle corners, use curves, to reduce strain on the copper that could lead to it cracking


Avoid using solid copper regions, use cross hatch instead.

Components on flex PCB’s

Yep, all sorts of SMD components can be fitted to flex PCB’s.

Rigid Flex PCB’s

This is a flex PCB that also has rigid sections. I can be as simple as a rigid PCB that has a flex section which comes off it to connect to something else, or more commonly several rigid sections of PCB with flex sections linking them allowing to be fitted into complex shapes in the final product without the need for FFC connectors and FFC cables to link them.

A common way to design these is for the flex PCB to be the middle 2 layers of a 4 layer design, so the rigid sections are 4 layers and the flex sections are 2 layers.

You can have the flex on the outside, although there can be usability issues, but the manufacturer will build it however you want.

Good resources

We benefit hugely from resources on the web so we decided we should try and give back some of our knowledge and resources to the community by opening up many of our company’s internal notes and libraries through mini sites like this. We hope you find the site helpful.
Please feel free to comment if you can add help to this page or point out issues and solutions you have found, but please note that we do not provide support on this site. If you need help with a problem please use one of the many online forums.


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