Rogers DiClad 870 and DiClad 880 are high frequency circuit laminates made with woven fiberglass and PTFE. They are separate grades in the DiClad family. Neither designation refers to a halogen leak detector or a radiometer.
These materials use a relatively high PTFE proportion and fewer glass plies compared with DiClad constructions such as 527. Designers consider them where low dielectric constant and low loss are useful, including microwave transmission lines and printed antennas. The exact electrical properties depend on the specified grade and manufacturer test conditions.
Do not treat the combined 870/880 family heading as a single ordering code. Record whether the circuit was designed for 870 or 880, together with dielectric thickness, copper foil and the applicable data-sheet revision. If considering a change, review impedance, physical dimensions and loss with the actual stackup.
PTFE fabrication requirements remain relevant despite the glass reinforcement. Confirm drilling, plated-hole preparation and any multilayer bonding construction with the selected board manufacturer.
Selection and validation
Before releasing a board, record the exact material designation, dielectric thickness, copper foil, finished stackup and inspection requirements. Have the fabricator review the construction and confirm material availability. Prototype measurements should establish whether the finished circuit meets its electrical and environmental requirements.
Official sources: Rogers DiClad 870/880 product information.
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