Rogers RO5880 High-Frequency Laminate: Key Material Properties for 5G/Millimeter-Wave Applications

Three datasheet corrections frame this analysis: the earlier version cited X/Y CTE of 12 ppm/°C (the official figures are 31/48, with Z at 237), thermal conductivity of 0.64 W/m·K (0.20 is the datasheet value), and an unsourced thermal case study — all removed. What remains is the defensible version of why 5880 earns its place in 5G and mmWave hardware: loss physics, phase consistency and humidity immunity.

• Base-station antennas and feed networks — the loss floor and isotropic Dk make it a default for radiating structures and beamforming feed runs; the isotropy eliminates glass-weave skew that plagues woven reinforcements.
• mmWave backhaul and satellite terminals — Ku/Ka-band front ends where every 0.1 dB of feed loss is link budget; machining specifics in the satellite machining guide.
• Communications equipment broadly — the loss-budget arithmetic by device class is in the communication equipment analysis.
• Automotive — with the usual boundary: 5880 serves 24 GHz-class sensors and antennas; 77/79 GHz front radar standardizes on the RO4000 series (Z-CTE 32, rigid, FR-4 processing). The split is argued in the EV analysis.

Thermal conductivity of 0.20 W/m·K is low — a 5880 antenna panel is not a heat sink, and high-power AAU front ends need thermal vias or metal-backed construction regardless of laminate choice. When the via-reliability side of Z-CTE 237 becomes the constraint, 5880LZ (Dk 1.96, Z-CTE 41.5, density 1.4) is the sanctioned exit — same PTFE family, ceramic-filled for dimensional stability, at the cost of slightly higher Df. The full comparison is in the 5880 vs 5880LZ selection guide.

• Core thickness by frequency — 0.127–0.254 mm for 28 GHz-class radiating structures; the seven-core table is in the thickness guide.
• Copper foil profile — low-profile foil for 28 GHz and above; conductor loss becomes comparable to dielectric loss at mmWave.
• Impedance verification — TDR coupons from the production panel; the ±0.02 Dk band only pays off if etch and plating hold their tolerances.
• Assembly thermal profile — PTFE is thermoplastic; reflow is fine but repeated excursions need review on thick-copper builds.

XCE PCB builds RT/duroid 5880 boards from 2 to 72 layers, impedance controlled to ±10%, panels up to 600 × 1200 mm, with sodium-naphthalene hole treatment as standard. Samples in as fast as 24 hours when laminate is in stock. Related: the laminate overview, the preferred-material case and the ultra-low-loss analysis.