There are many high level benefits to Rigid Flex circuits including:

Air Gap –Through the process of selective bonding, increased flexibility is achieved by “unbonding” layers so they are allowed to flex freely. At Flexible Circuit Technologies, we are proud to be a leading designer of this air gap technology allowing your designs more flexibility.

Connection Reliability – Connecting rigid layers with flexible cables is the foundation for combination rigid flex circuits.

Controlled Impedance – With increasing signal switching speeds, engineers need to understand and control the impedance of traces. With short signal transition times and high clock rates of modern digital circuitry, traces need to be considered transmission lines instead of simple interconnections. With today’s higher speed requirements, controlled impedance traces are designed to minimize electrical reflections and ensure an error free transition between the track and interconnections. Controlled impedance, if perfectly optimized, allows control of the physical dimensions and material of the cable. Controlled impedance signal transmission requires flexible circuit materials to be uniform in both thickness and electrical properties. It is necessary that the circuit manufacturer accurately etch the copper foil to optimize impedance.