Dk 2.20 ± 0.02, Df 0.0009, 0.02% moisture absorption — the measured parameters, key features and applications behind PTFE’s lowest-loss laminate.
RT/duroid 5880 high-frequency laminate is a polytetrafluoroethylene (PTFE) glass fiber-reinforced material. The microfibers within the board are randomly distributed, providing maximum strength enhancement for circuit application and production processes.
These materials possess the lowest dielectric constant among similar materials, and their extremely low dielectric loss makes them highly suitable for high-frequency, broadband applications that require minimized dispersion and loss. Additionally, the extremely low moisture absorption rate of RT/duroid 5880 makes it an ideal choice for applications in high-humidity environments.
RT/duroid 5880 can be easily cut into the desired shapes, perfectly adapting to the requirements of various cavity structures for printed circuit boards in high-frequency applications. It is resistant to erosion from all solutions and reagents used during etching and plated-through-hole processes, and can withstand various high- and low-temperature processing procedures.
To meet the increasingly stringent requirements for substrates in high-frequency circuit design, Rogers introduced RT/duroid 5880 with the following measured parameters:
| Parameter | Value | Test Condition / Note |
|---|---|---|
| Dielectric constant (Dk) | 2.20 ± 0.02 | 10 GHz, IPC-TM 2.5.5.5 — lowest among similar materials |
| Dielectric loss (Df) | 0.0009 | 10 GHz, IPC-TM 2.5.5.5 — extremely low loss |
| Max usable frequency | Ku band and beyond | Minimized dispersion for broadband applications |
| Moisture absorption | 0.02% | Extremely low; ideal for high-humidity environments |
| Electroplated copper thickness | 8–70 μm | Supported plating range |
| Lead-free process | Compliant | Meets lead-free process standards |
For other Rogers PTFE laminates and their trade-offs, see our RO4000 series overview and RT5870/RT5880 explainer.
Common questions about RT/duroid 5880 parameters.
Dk is 2.20 ± 0.02 measured at 10 GHz under the IPC-TM 2.5.5.5 standard — the lowest among comparable reinforced PTFE materials.
Df is only 0.0009 at 10 GHz (IPC-TM 2.5.5.5), which is why the laminate suits broadband, low-dispersion applications up to the Ku band and beyond.
Yes. With moisture absorption as low as 0.02%, it is an ideal choice for high-humidity environments where other laminates would shift electrically.
The laminate supports an electroplated copper thickness ranging from 8 to 70 μm, and it can be easily cut into desired shapes for cavity structures.
Send us your layer count, copper weight and frequency band. We will quote your RT/duroid 5880 high-frequency PCB with a confirmed stack-up.
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