RT6002 vs RT6010: High-Dk or Low-Loss PTFE?

RT6002 vs RT6010: Quick Answer

RT/duroid 6002 (Dk 2.94, Df 0.0012 at 10 GHz) is a low-loss, dimensionally stable PTFE-ceramic composite whose CTE closely matches copper, making it the default for space, satellite and phased-array applications where thermal cycling is severe. RT/duroid 6010 (Dk 10.2, Df 0.0023 at 10 GHz) trades that dimensional stability for a very high dielectric constant, shrinking patch antennas, filters and couplers by roughly 55 % in wavelength compared to 6002. Choosing between RT6002 vs RT6010 comes down to whether your design is driven by miniaturization or by low loss and CTE reliability. Both laminates belong to the Rogers RT/duroid family and share a PTFE-ceramic filler system, but the filler loading and ceramic type differ substantially.

RT6002 vs RT6010 Side-by-Side Comparison

Dielectric Constant: Why 10.2 Matters in the RT6002 vs RT6010 Decision

The guided wavelength on a substrate scales as 1/√Dk. On RT/duroid 6010 (Dk 10.2) a quarter-wave element at 2.4 GHz is about 9.8 mm long, versus roughly 22.8 mm on 6002 (Dk 2.94). That 57 % size reduction lets designers fit GPS patch antennas, L-band filters and cellular front-end couplers into tight enclosures. The trade-off is tighter trace-width tolerances: a 50 Ω microstrip on 25 mil (0.635 mm) 6010 is only about 0.6 mil (15 µm) wide—often impractical—so thinner substrates or alternative topologies like grounded coplanar waveguide are used instead.

Dk Tolerance and Drift

RT/duroid 6002 holds Dk within ±0.04 (about ±1.4 %), while 6010 specifies ±0.25 (about ±2.5 %). For narrowband filters with fractional bandwidth under 3 %, the 6010 tolerance can shift the center frequency enough to require post-fab tuning. Temperature also matters: both laminates exhibit a small Dk shift with temperature, but the high ceramic loading in 6010 makes its temperature coefficient of Dk (TCDk) somewhat larger in absolute terms. Use the estimator below to see how much Dk drifts over your operating temperature range.

For example, if you enter Dk 10.2 with a TCDk of −125 ppm/°C and a temperature swing from −40 °C to +85 °C (125 °C delta), the tool estimates a Dk shift of about 0.16 units—enough to move a 10 GHz bandpass filter center by ~80 MHz. On 6002 with a TCDk near −50 ppm/°C the same swing produces a shift of only 0.018, which is usually negligible. If your design cannot tolerate the 6010 drift, consider adding frequency-margin guard bands or switching to a hybrid stackup with 6002 for filter layers.

CTE and Reliability Under Thermal Cycling

RT/duroid 6002 was engineered specifically for CTE matching to copper (17 ppm/°C in x/y). Its measured 16 ppm/°C means plated through-holes and surface-mount solder joints see minimal thermomechanical stress during temperature excursions from −55 °C to +125 °C, which is why 6002 dominates in LEO and GEO satellite programs. RT/duroid 6010’s x/y CTE of 24 ppm/°C is still respectable—better than many standard PTFE laminates—but the 7 ppm/°C mismatch to copper accumulates over thousands of thermal cycles, increasing the risk of barrel cracks in vias and pad lift on fine-pitch BGAs. This CTE gap is one of the most consequential factors in the RT6002 vs RT6010 trade-off for high-reliability hardware.

If you are comparing thermal-management laminates for power-amplifier applications, the TC350 vs RT/duroid 6035HTC comparison covers laminates with thermal conductivities above 1 W/m·K.

Enter the CTE of your laminate (16 for 6002, 24 for 6010), the CTE of your conductor (17 for copper), the temperature range and the board thickness. The calculator returns the estimated differential strain per cycle. A result above roughly 0.05 % strain per cycle is a caution flag for Class 3 hardware per IPC-6012 Class 3 requirements; you would then need to derate via aspect ratios, add via fills, or switch to the lower-CTE 6002.

Loss Budget: Where Each Laminate Fits

At 10 GHz, 6002’s Df of 0.0012 delivers roughly 0.4 dB/inch total loss on a 50 Ω microstrip (including conductor loss on 1 oz rolled copper), while 6010 at Df 0.0023 runs closer to 0.7 dB/inch on a comparable geometry. The gap widens at Ka-band: 6002 remains usable past 40 GHz for radar feed networks, whereas 6010’s loss tangent climbs above 0.003 at 30 GHz, making it impractical for long runs at millimeter-wave frequencies.

For applications above 40 GHz, neither 6002 nor 6010 is the first choice. Designers typically move to RT/duroid 5880 (Dk 2.20, Df 0.0009) or consider PTFE vs LCP trade-offs for flexible or multi-layer millimeter-wave builds.

Fabrication and Processing

Drilling and Plating

Both laminates are soft PTFE composites that require carbide drills with positive rake angles and controlled chip loads (typically 0.002–0.003 in per revolution) to avoid smearing. The higher ceramic loading in 6010 increases drill wear by an estimated 20–30 % compared to 6002, so tool-life budgets should be adjusted. Both need sodium-etch or plasma treatment before electroless copper plating to activate the PTFE surface; skipping this step is the single most common cause of delamination in PTFE boards.

Hybrid Stackups

A common architecture pairs a 6010 layer for a compact patch antenna with a 6002 layer for the feed network, bonded with Rogers 3001 bonding film. This captures miniaturization on the radiating side and low loss on the distribution side. The z-axis CTE mismatch between the two materials is small (both 24 ppm/°C), so via reliability in the hybrid is comparable to a single-material build. If you are evaluating whether a lower-cost substrate could replace either layer, the FR4 vs high-frequency laminate guide explains where FR4 falls short.

When to Choose RT/duroid 6002

• Space and satellite hardware — CTE match to copper survives thousands of thermal cycles from −55 °C to +125 °C without via failure.
• Low-loss feed networks — Df 0.0012 keeps insertion loss under budget for corporate-feed arrays up to Ka-band.
• Phased-array radar — Dk stability across temperature keeps beam-steering phase errors small.
• Multilayer PTFE builds — Available down to 5 mil (0.127 mm), enabling thin RF layers in complex stackups.

When to Choose RT/duroid 6010

• Miniaturized patch antennas — Dk 10.2 cuts element size by more than half, critical for GPS, GNSS and L/S-band antennas in constrained housings.
• Compact filters and couplers — High Dk shrinks coupled-line and hairpin structures, saving board area at frequencies below ~15 GHz.
• Dielectric resonator feeds — The high Dk can serve as a partial dielectric resonator element itself in some antenna topologies.
• Cost-sensitive designs at moderate frequency — Where loss at 1–6 GHz is acceptable and size reduction offsets the tighter processing tolerances.

For other high-Dk material options, the RO4360G2 vs RO3010 comparison covers thermoset alternatives that are easier to fabricate than PTFE.

RT6002 vs RT6010 Decision Flowchart

1. Is miniaturization the primary driver? Yes → 6010. No → continue.
2. Operating frequency above 20 GHz? Yes → 6002 (or consider 5880). No → continue.
3. Severe thermal cycling (space, military, automotive)? Yes → 6002. No → continue.
4. Narrowband filter requiring tight Dk tolerance? Yes → 6002 (±1.4 % vs ±2.5 %). No → 6010 if size matters, 6002 if loss matters.

Frequently Asked Questions

Can RT/duroid 6002 and 6010 be bonded in the same stackup?

Yes. Rogers 3001 bonding film (Dk 2.28, PTFE-based) is the standard interlayer adhesive. Because both materials share a z-axis CTE of 24 ppm/°C, the hybrid interface survives thermal cycling well. Pre-treat both surfaces with sodium-naphthalene etch or plasma before bonding.

Is RT/duroid 6010 suitable for 5G mmWave (28 GHz)?

Generally no. At 28 GHz the dissipation factor of 6010 exceeds 0.003, and the tight trace widths needed for 50 Ω lines on a high-Dk substrate become impractical. For mmWave 5G front-ends, 6002 or RT/duroid 5880 are better choices.

What is the lead time for RT/duroid 6002 and 6010?

Both are specialty PTFE laminates with lead times typically in the 6–12 week range depending on thickness, cladding and order volume. Stocking programs through authorized distributors can shorten this for standard panel sizes.

How does moisture absorption affect Dk on these laminates?

Both 6002 and 6010 absorb only 0.02 % moisture by weight, among the lowest of any PCB laminate. The Dk shift from moisture is negligible—under 0.01 units—so neither material requires hermetic sealing in humid environments.

Can I use standard FR4 processing equipment for RT/duroid laminates?

Drilling, routing and lamination presses are the same, but you must add a PTFE surface-activation step (sodium etch or plasma) before plating, and use lower lamination pressures (typically 50–100 psi vs 200+ psi for FR4). Failure to activate the PTFE surface is the leading cause of copper adhesion failure on these materials.