Quick detail:
Rogers - High Frequency Circuit Material is glass reinforced hydrocarbon/ceramic laminat ( not PTFE ) designed for performance sensitive, high volume commercial applications
The RO3003 from Rogers Corp. is a ceramic-filled PTFE composite/laminate for use in commercial microwave and RF applications. It features excellent stability with a dielectric constant of 3 up to 40 GHz at room temperature. The material has a dissipation factor (Df) of 0.0013 at 10 GHz and is ideal for band pass filters, microstrip patch antennas, and voltage controlled oscillators.
By far the most commonly used is the Rogers RO4000 series of high frequency materials.
RO4350B laminate is a hydrocarbon/ceramic base, which can be manufactured using standard FR-4 type multilayer processes, making it not only popular but economical to manufacture. Low dielectric loss is the major appealing characteristic of this material.
Multilayers can be constructed of a “pure package” using Rogers 4450 prepreg, or by using standard FR-4 prepreg. Popular constructions limit the Rogers material to the “caps” of the stackup thereby managing overall cost by using the material only where it is required, and filling the remainder of the board with standard FR-4 cores/prepreg.
PTFE, commonly known as “Teflon” is another fairly common callout for this genre’s material requirements. There are many different formulations and laminates such as Rogers 3000 series ceramic-filled PTFE composites, R/T Duroid 5870 and 5880 glass microfiber reinforced PTFE, etc. They can be very difficult in multilayer configurations however, as some require the use of high temperature bonding films or adhesives. The old saying that “nothing likes to stick to Teflon!” sometimes holds true! But their extremely low loss characteristics make them ideal for exacting stripline and microstrip circuit designs.
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