The demand for Flexible Printed Circuits (FPCs) in global consumer electronics, particularly in devices like mobile phones and flat-panel TVs, is rapidly increasing. FPCs used in phones, which integrate digital camera circuits, exceed those in rigid PCBs. In flat panel displays (FPDs), FPCs are arranged both vertically and horizontally, with expanding sizes driving swift adoption. Future trends suggest not only greater quantities but also significant quality improvements, moving from single-sided to advanced double-sided or multilayer rigid-flex circuits. However, achieving developments like rollable phones or foldable pads entails overcoming technical challenges such as flexible batteries and circuit boards.