Flex PCBs are composed of flexible materials such as polyimide or PET, allowing for bending and adaptation, making them particularly useful for applications where conventional rigid circuit boards are insufficient. They are lightweight, compact, and can be used in complex, spatially constrained designs, such as in wearables, portable devices, or medical technology. The flexibility of the circuit board allows electronic components to be placed on flexible substrates, facilitating integration into unconventional shapes and tighter spaces. These PCBs are ideal for applications requiring high flexibility while maintaining stability and performance, such as in the automotive industry and modern lighting solutions.