If you need one board to interface with another board, putting an FFC connector on your board is a pretty good idea. An FPC (Flexible Printed ... it provides no electrical connection whatsoever ...

The dual entry card edge connectors feature high-strength beryllium copper compression contacts with a 1mm reduced pitch, resulting in a small-form-factor, vertical-edge connector. This unique design ...

His own description of his USB-C connector using a flexible PCB and a BGA-packaged ATTiny84A microcontroller is “cursed”, but we can’t decide whether or not it should also be called ...