H ere  are the Cost Benefits to Rigid-Flex PCB：

Smaller Sizes to Save on Materials

When thinking about rigid-flex PCB, take into consideration that these circuit boards can be designed and manufactured into much smaller overall sizes due to the elimination of additional connectors. This means that the end product doesn't have to be designed around the circuitry. Instead, you can design the product and make the rigid-flex circuit board fit better into the smaller space.

This cost advantage is perfect for applications that come in smaller and thinner sizes, such as handheld devices. With the smaller size, the rigid-flex PCB reduces the overall cost of the assembly as it doesn't require as much materials.

Fewer Parts During Mass Manufacturing Runs

If the product requires multiple circuit boards, the costs increase when it comes to manufacturing rigid PCBs even though the materials may be cheaper. Why? Because with each rigid printed circuit, there will need to be connectors and cable assemblies added to connect each circuit board together, increasing costs as more and more parts are added into the assembly process.

Rigid flex circuit boards streamline the process as it doesn't need extra connectors and cables to interconnect each printed circuit board together. Instead, the additional circuitry is integrated through the flex areas into the same part. It removes the need for cable assemblies, helping to speed up long production runs and make it more cost effective. It is also more aesthetically pleasing, which can be a factor when the appearance of the application is important to investors and consumers.