The combination of Rigid-Flex boards is widely used, for example: high-end smart phones such as iPhone; high-end Bluetooth headsets (requires signal transmission distance); smart wearable devices; robots; drones; curved displays; high-end industrial control equipment; Can see its figure. The following is about 6 Layer FR406 Rigid Flex PCB related, I hope to help you better understand 6 Layer FR406 Rigid Flex PCB.