A Flexible Printed Circuit Board (Flexible PCB) is a type of Printed Circuit Board (PCB) that, unlike the traditional rigid PCB, is designed to flex and bend. This flexibility is achieved by using materials like polyimide or polyester film, which are durable and flexible. These boards are often used in applications where space is a constraint or where the board needs to conform to a specific shape or withstand frequent flexing. They are commonly found in modern electronics like smartphones, wearable devices, and medical equipment. The key advantage of a flexible PCB is its ability to reduce the size and weight of the final product significantly. It also enhances the device’s reliability by reducing the number of interconnects and potential failure points. The design of a flexible PCB can include single-sided, double-sided, or multilayer configurations, depending on the complexity and requirements of the application.