Flex circuit design is part mechanical and part electrical. Much of what we concern ourselves with in flex circuit design at PFC is mechanical because the circuit is bent and sometimes folded to reach its desired configuration. This gives a flex circuit the best characteristics of both a copper cable assembly, harness and printed circuit board all in one!
Of course electrical design is also important. Because of the polyimide materials used as dielectrics, PFC can provide an electrical solution that cannot be matched by a printed circuit board or a cable assembly.
For example, with standard materials flex circuits can reach 10 gig/sec speeds, which is difficult with a copper cable assembly and requires special printed circuit board materials. With special materials we can design to 25 gig/sec and even 40 gig/sec flex circuits.
High speed circuits require impedance control (signal matching). Currently 65% of all PFC’s circuits are impedance controlled. We have provided a great section here in the web site on impedance matching and design for your perusal. We think you will get a lot out of it!
In addition to high speed characteristics, flex can be developed as a high current/ high power interconnects. Again, because of the characteristics of the polyimide dielectric and its ability to withstand high temperatures, we can provide heavy copper applications for power distribution.