The key feature of Flexible PCBs is their ability to be integrated into devices with complex geometries, tight spaces, or where mechanical stress or movement is a concern. They are commonly used in industries such as consumer electronics, medical devices, aerospace, automotive, and more. The advantages of Flexible technologies are not solely related to design considerations but also encompass reliability. A Flex PCB acts as a wire between two PCBs, with no need for external components, connectors, and soldering processes. This makes it more reliable. Even if the cost of the material and the process is higher than that of two rigid PCBs, the manufacturing costs, weight, and the size of the final product make this technology cost-efficient.