Flexible printed circuits (FPCs) are thin, lightweight electronic circuits made from flexible materials. They are designed to bend and twist, allowing them to fit into compact spaces and complex shapes. FPCs are commonly used in devices like smartphones, tablets, and wearable technology, where traditional rigid circuits would be impractical. These circuits are created by printing conductive pathways onto a flexible substrate, often made of materials like polyimide or polyester. The flexibility of FPCs enables better design options and can improve the overall performance of electronic devices by reducing weight and space requirements.