Rogers vs Shengyi | High-Frequency Laminate Compared

Rogers vs Shengyi: Which High-Frequency Laminate Should You Specify?

Rogers laminates (RO4350B, RO3003, RT/duroid) remain the global benchmark for RF and microwave PCBs, offering tightly controlled Dk, ultra-low Df and proven reliability to 77 GHz and beyond. Shengyi Technology (SYTECH), China’s largest CCL manufacturer, has steadily expanded its high-frequency portfolio—S7136, S7439, S1000-2M and the newer PTFE-based lines—targeting the same applications at 30–50 % lower material cost. The right choice depends on your operating frequency, Dk tolerance budget, qualification requirements and total landed cost.

Company and Portfolio Overview

Rogers Corporation

Headquartered in Chandler, Arizona, Rogers has been developing advanced circuit materials since the 1960s. Its RF laminate families include hydrocarbon-ceramic (RO4000 series), PTFE-woven-glass (RT/duroid 5000/6000), and PTFE-ceramic (RO3000). Rogers’ RO4000 product page details the full range. These materials are specified by name in many Tier-1 OEM qualification documents for aerospace, defense, automotive radar and 5G infrastructure.

Shengyi Technology (SYTECH)

Listed on the Shenzhen Stock Exchange, Shengyi ships more square meters of copper-clad laminate than any other manufacturer worldwide. Its high-frequency lines—S7136 (hydrocarbon-ceramic, positioned against RO4350B), S7439 (low-Dk hydrocarbon), and PTFE-glass grades—are gaining traction in commercial 5G, Wi-Fi 6E/7, GNSS and automotive radar below 24 GHz. Domestic Chinese supply and aggressive pricing are the primary draws.

Head-to-Head Property Comparison

Key takeaway: At 10 GHz the headline Dk and Df numbers look close—S7136 trails RO4350B by roughly 0.0003 in Df and matches on Dk. The real gap widens when you look at lot-to-lot Dk consistency, thermal dimensional stability and third-party qualification data, as discussed below.

Dielectric Performance: Where the Numbers Diverge

Dk Tolerance and Frequency Stability

Rogers publishes Dk vs. frequency curves up to 40 GHz and guarantees lot-to-lot Dk within ± 0.05 for RO4350B, backed by decades of statistical process control. Shengyi’s S7136 datasheet quotes the same ± 0.05 tolerance, but independent lab data from fabricators often shows wider spread—closer to ± 0.07 in early production lots. For narrow-band filter or phase-array feed-network designs where a 2 % Dk shift moves your center frequency by tens of MHz, that difference matters.

Above 24 GHz the gap grows. Rogers’ RO3003 and RO3006 are characterized and proven at 77 GHz automotive radar frequencies. Shengyi’s PTFE grades are less widely characterized above 30 GHz, and published data at millimeter-wave frequencies is limited. If your design operates in the 77 GHz radar band where RO3003 excels, Rogers remains the safer specification.

Loss Tangent and Insertion Loss

At sub-6 GHz 5G bands (3.3–4.2 GHz, n77/n78), S7136’s Df of 0.0040 adds only ~0.15 dB/inch more insertion loss than RO4350B on a 50 Ω microstrip at 20 mil dielectric thickness—often an acceptable trade-off in a power-amplifier combiner or antenna feed. At 28 GHz (n257/n258), that same Df delta amplifies to roughly 0.4 dB/inch, which can erode link margin in a phased-array module. Choosing the right copper foil roughness profile matters just as much as laminate Df at these frequencies.

Thermal and Mechanical Reliability

Rogers RO4350B’s z-axis CTE of 32 ppm/°C is tightly matched to copper’s ~17 ppm/°C, keeping plated-through-hole barrels intact over thermal cycling. S7136’s higher z-CTE (~40 ppm/°C) increases the risk of barrel cracking in thick boards or boards with high aspect-ratio vias, especially after lead-free reflow at 260 °C peak. For designs requiring IPC-6012 Class 3 reliability, the lower CTE of Rogers is a quantifiable advantage.

Td (decomposition temperature) is another differentiator: RO4350B at 390 °C gives more process headroom than S7136 at ~360 °C. In hybrid stackups that combine high-frequency layers with standard FR-4, lamination press cycles can push peak temperatures above 200 °C for extended dwell times, making the higher Td a practical buffer. More on that trade-off in our guide to hybrid vs full Rogers stackups.

Processability and Fabrication

Drilling, Lamination and Registration

Both RO4350B and S7136 are thermoset hydrocarbon-ceramic composites that process on standard FR-4 equipment—no special sodium or plasma etch is required for through-hole preparation, unlike PTFE laminates. S7136 drills cleanly, accepts standard oxide or oxide-alternative bonding treatments, and laminates with common prepregs. Fabricators familiar with RO4350B typically need only a drill-speed tweak and a revised press cycle to run S7136.

Copper Adhesion

Rogers specifies peel strength ≥ 6 lb/in (after thermal stress) for RO4350B with standard ED foil. Shengyi’s S7136 targets ≥ 5 lb/in. The difference rarely causes field failures, but it can show up as micro-delamination during aggressive rework or multiple reflow cycles, so keep it in mind for assemblies that require more than three reflow passes.

Find the Right Rogers Grade for Your Design

If your comparison lands on the Rogers side—or you want to narrow down which Rogers family fits your frequency, Dk and loss requirements—use the selector below. Enter your target frequency, acceptable loss and dielectric constant range to see recommended grades and thicknesses.

For example, entering 5.8 GHz, Dk around 3.5 and Df below 0.004 returns RO4350B in 10 or 20 mil as the top match—confirming it as the direct Rogers competitor to S7136. Switching the frequency to 77 GHz and Dk to 3.0 shifts the recommendation to RO3003, a grade for which Shengyi has no direct equivalent with comparable published data.

Cost, Supply Chain and Lead Time

Material Cost

S7136 typically costs 35–50 % less than RO4350B per panel, depending on thickness and copper weight. For high-volume consumer or commercial products—Wi-Fi access points, GNSS antennas, sub-6 GHz small cells—this saving flows straight to the BOM. Our overview of lower-cost Rogers alternatives benchmarks S7136 alongside Taconic RF-35 and Panasonic Megtron 6.

Supply Chain Resilience

Rogers operates factories in the US, Belgium and China, but lead times for specialty grades can stretch to 8–12 weeks during demand spikes (as happened during the 5G build-out in 2020–2022). Shengyi’s massive domestic capacity in Dongguan and Suzhou means 2–4 week lead times for S7136 in China, though export logistics add time for non-Chinese buyers. For programs that require dual-source qualification, pairing RO4350B with S7136 is increasingly common—provided you validate Dk consistency lot by lot.

Qualification and Standards

Rogers laminates carry broad third-party certifications: UL, IPC-4103 slash-sheet listings, and OEM-specific approvals in automotive (AEC-grade testing), aerospace and defense. Shengyi’s S7136 holds UL recognition and is listed under IPC-4103, but OEM-specific approvals outside China are still building. If your end customer requires a named-material callout on the drawing—common in defense and automotive Tier-1 programs—Rogers remains the path of least resistance.

When to Choose Rogers

• Frequency > 24 GHz: mmWave radar, 5G FR2 phased arrays, satellite Ka-band. Dk stability and published characterization data above 30 GHz are decisive.
• Tight Dk tolerance designs: narrow-band filters, coupled-line couplers, Butler matrices where ± 0.05 must be guaranteed, not nominal.
• Class 3 reliability: aerospace, defense, medical implant—lower z-CTE and higher Td reduce via and delamination risk.
• OEM-mandated material: many qualification documents name Rogers grades explicitly; substitution requires full requalification.

When to Choose Shengyi

• Sub-6 GHz commercial RF: Wi-Fi 6E/7 front-end modules, GNSS patch antennas, LTE/5G sub-6 small cells where Df of 0.004 is adequate.
• Cost-sensitive high volume: consumer IoT, automotive V2X below 6 GHz, industrial ISM-band sensors where BOM pressure outweighs marginal Df improvement.
• China-domestic supply chain: programs manufactured and sold within China benefit from short lead times, local technical support and tariff-free procurement.
• Dual-source strategy: qualifying S7136 alongside RO4350B de-risks supply disruption—provided your design can absorb the wider Dk spread.

Hybrid Stackup Strategy

Many designs do not need every layer in high-frequency laminate. A common cost-optimization approach pairs one or two S7136 (or RO4350B) signal layers with FR-4 or standard mid-Tg laminate for power, ground and digital routing. This hybrid approach can cut material cost by 40–60 % compared with a full Rogers stackup while preserving RF performance on the layers that matter.

Comparison Summary

Frequently Asked Questions

Can S7136 be a drop-in replacement for RO4350B?

In many sub-6 GHz designs, yes—the Dk and thickness options are close enough that only a minor impedance re-simulation is needed. Above 10 GHz, you should prototype and measure S-parameters to confirm insertion loss and phase match, because lot-to-lot Dk variation in S7136 can be wider than Rogers’ guaranteed window.

Is Shengyi S7136 listed in IPC-4103?

Yes. S7136 has an IPC-4103 slash-sheet listing and UL recognition. However, OEM-specific approvals (automotive PPAP, defense QPL) are less widespread than Rogers’.

What about comparing Rogers to Panasonic or Taconic?

Each competitor occupies a slightly different niche. Panasonic Megtron targets high-speed digital more than pure RF; Taconic RF-35 is a closer RF alternative to RO4350B. See our RF laminate comparison hub for side-by-side guides across all major brands.

Does copper roughness matter more than laminate Df?

Above roughly 10 GHz, conductor loss from copper surface roughness can equal or exceed dielectric loss. Specifying VLP or HVLP foil on either Rogers or Shengyi laminates is critical at mmWave frequencies—sometimes more impactful than switching laminate brands.

How do I dual-qualify Rogers and Shengyi?

Build identical test coupons on both materials in the same fabrication lot, measure Dk/Df with a split-post dielectric resonator or ring-resonator method, and compare insertion loss on representative transmission-line structures. Set a go/no-go window (e.g., Dk within ± 2 % of nominal, Df within 10 %) and require incoming Dk certification per lot from Shengyi.