When your design demands stable electrical performance across a wide frequency range, standard FR4 substrates fall short. The 4-layer Rogers 4350B PCB — and its hybrid Rogers/FR4 counterpart — are fabricated specifically for RF, microwave, and millimetre-wave circuits where dielectric constant (Dk) consistency, low insertion loss, and controlled impedance define whether a design succeeds or fails. Engineers specifying antennas, power amplifiers, radar front-ends, or high-speed signal routing rely on Rogers 4350B for its tightly controlled Dk of 3.48 ±0.05 and low dissipation factor (Df) of 0.0037 at 10 GHz.
The hybrid Rogers/FR4 option combines Rogers laminate on the signal layers with FR4 on the inner or power layers — balancing RF performance with cost efficiency. This makes it a practical choice for mixed-signal boards where not every layer demands premium dielectric properties.
Key Features
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Material options: Rogers 4350B (all layers) or hybrid Rogers 4350B / FR4 stack-up
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Layer count: 4-layer construction
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Dielectric constant (Dk): 3.48 ±0.05 (Rogers 4350B)
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Dissipation factor (Df): 0.0037 @ 10 GHz
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Controlled impedance: Single-ended and differential pairs, ±10% or tighter
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Copper weights: 0.5 oz to 2 oz per layer
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Min. trace/space: 3 mil / 3 mil
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Surface finishes: ENIG, HASL (lead-free), Immersion Silver, OSP
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Solder mask: LPI — green, black, or custom
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IPC Class 2 & Class 3 fabrication available
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Online instant pricing for standard configurations
Applications
Rogers 4350B and hybrid Rogers/FR4 PCBs are specified across industries where RF and signal integrity are critical:
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Telecommunications: 5G base stations, small cells, antenna arrays
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Aerospace & Defence: Radar modules, satellite communication, avionics RF boards
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Automotive: ADAS radar (77 GHz), V2X communication modules
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Medical: Wireless telemetry devices, diagnostic imaging front-ends
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Industrial IoT: High-frequency sensing and wireless data transmission
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Consumer Electronics: Wi-Fi 6/6E modules, Bluetooth and UWB antenna boards
Why Choose PCBSYNC
PCBSYNC is a professional PCB fabrication, PCBA, and EMS manufacturer delivering precision-built electronics for aerospace, medical, automotive, industrial, and smart energy applications. We handle everything from rapid prototyping to mass production — including rigid, flexible, and rigid-flex PCBs, full turnkey assembly, component sourcing, AOI and X-ray inspection, and OEM/ODM support. Reliable boards. Consistent quality. From prototype to production — PCBSYNC.
Ready to specify your 4-layer Rogers 4350B or hybrid Rogers/FR4 stack-up? Use our online pricing tool or contact PCBSYNC directly to discuss your impedance requirements, delivery timeline, and volume pricing.
