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I'm a student(don't know much on Eagle) working on a project where I need a way of multi-touch finger tracking on flexible material. Will flex pcbs work?

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Yes, a flexible PCB (FPC) can work. Make sure the circuit is secured such that it doesn't flex or move in system. If it is going to flex in-system, make sure you understand exactly what you need from the touchpad. For example, it will be a lot easier to design a system that only supports 2-finger multitouch for gestures compared to a system that requires resolution of 10 fingers. It will be incredibly difficult to get a flexible, 10-finger, touchpad working. I would not attempt this unless that is what you plan on spending the next two years doing.

If you can get away with a two-finger solution, Cypress has the best solution for you.

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