|Calculation of the track width (in mm) for an impedance of:|
(Note: RO4350B is similar to RO4003B and it is flame retardant)
RO4003 and RO4350 ceramic loaded thermoset plastic resin laminates were developed as an alternative to PTFE laminates for microwave frequency applications, they have better performaces than traditional FR4 even keeping the same processing and assembling cost.
RO4350 is flame retardant version of RO4003, both laminates have a better rigidity compared with PTFE types and same as FR4.
These laminates are manufactured with tight tolerances of εr and thickness in order to reach a very good repeatability.