Rogers RT/duroid 5870 PCB 2-layer 10mil Laminate ENIG Finish Bare Copper

Rogers RT/duroid 5870 PCB 2-layer 10mil Laminate ENIG Finish Bare Copper

Introduction

This is engineering-grade product description for a2-layer rigid high-frequency PCB built on Rogers RT/duroid 5870 dielectric with a nominal core thickness of 10 mil (0.254 mm). Targeted at RF/microwave engineers, aerospace system designers, and high-reliability electronics manufacturers, this description emphasizes electrical performance, mechanical stability, fabrication control, quality assurance, and field reliability. All specifications comply with IPC-Class2 standards and are validated by full electrical testing before shipment.

1. Overview & Positioning

This RT/duroid 5870 PCB is a precision-engineered high-frequency substrate solution optimized for microwave, millimeter-wave, and Ku-band applications where low insertion loss, stable dielectric properties, and consistent impedance control are mission-critical. Unlike standard FR-4 or general-purpose high-speed laminates, RT duroid 5870 is a glass-microfiber-reinforced PTFE composite formulated to deliver exceptional electrical uniformity across wide frequency ranges, minimal signal attenuation, and strong environmental robustness. The 10-mil thin-core construction supports compact, lightweight designs while maintaining mechanical integrity for automated assembly and field operation. This board is ideal for aerospace antennas, radar front-ends, point-to-point radio links, guidance systems, and high-performance microstrip/stripline circuits.

2. PCB Construction Details

This section summarizes the complete physical build, surface finishing, and fabrication constraints of the board, ensuring compatibility with high-frequency assembly and test flows.

3. PCB Stackup Structure

The stackup defines the layer sequence and thickness balance, directly controlling impedance, loss, and thermal behavior in high-frequency transmission lines.

4. PCB Layout & Net Statistics

These metrics reflect routing complexity, component density, and interconnect structure for assembly and simulation modeling.

5. Core Performance Advantages

5.1 Electrical Superiority

Rogers 5870 provides Dk = 2.33±0.02 @ 10 GHz with extremely tight lot-to-lot consistency, enabling accurate impedance prediction and simulation matching. The dissipation factor is 0.0012 @ 10 GHz, one of the lowest among reinforced PTFE materials, drastically reducing insertion loss in long traces, antenna feeds, and filter structures. Stable electrical performance extends reliably into Ku-band and millimeter-wave regions, supporting modern broadband communication and sensing systems.

5.2 Mechanical & Thermal Stability

The laminate exhibits isotropic electrical behavior, meaning consistent performance in X, Y, and Z directions, reducing signal skew and improving impedance uniformity. Coefficients of thermal expansion (CTE) are well-balanced: X-axis 22 ppm/°C, Y-axis 28 ppm/°C, Z-axis 173 ppm/°C. This matches copper and component packaging closely, lowering thermomechanical stress during thermal cycling and enhancing long-term solder joint reliability.

5.3 Environmental Resistance

Moisture absorption is only 0.02%, making the material exceptionally stable in high-humidity outdoor, airborne, or shipboard environments. Unlike many hydrocarbon-based substrates, RT/duroid 5870 resists degradation, drift, and leakage caused by moisture ingress. It is chemically inert against common PCB etchants, plating solutions, solvents, and reagents used in fabrication, ensuring consistent yield and performance across production runsRogers Corporation.

5.4 Fabrication & Assembly Compatibility

Despite being a PTFE-based high-performance material,RT/duroid 5870 substratemachines, drills, routes, and cuts cleanly. Plated through-holes are robust with 20μm via plating, supporting reliable interlayer connection. The ENIG surface finish provides excellent solderability, fine-pitch contact stability, and corrosion resistance—critical for aerospace and defense applications. The absence of solder mask and silkscreen preserves high-frequency performance by eliminating parasitic losses and geometry variationsRogers Corporation.

6. Typical Target Applications

This 10-mil RT/duroid 5870 PCB is purpose-built for:

• Commercial airborne broadband antenna systems
• High-performance microstrip and stripline circuits
• Millimeter-wave sensors and communication front-ends
• Radar systems (ground, airborne, shipborne)
• Precision guidance and navigation modules
• Point-to-point digital radio and microwave backhaul antennas
• Test fixtures for RF characterization and high-speed validation

Deep Dive: RT/duroid 5870 Copper Clad Laminate (CCL) Knowledge

This section is fully separated from the PCB assembly description and provides detailed CCL material science, specifications, comparison, and application guidance for engineering selection and design validation.

1. Basic Introduction to RT/duroid 5870 CCL

Rogers RT/duroid 5870 is a high-frequency glass-microfiber-reinforced PTFE copper clad laminate designed for demanding RF, microwave, and millimeter-wave circuits. The random orientation of microfibers creates exceptional dielectric constant uniformity panel-to-panel and across frequency. It is widely recognized as a benchmark material for low loss, stable Dk, and mechanical ruggedness in professional high-frequency systems.

2.RT/duroid 5870 Datasheet Values

3. Material Structure & Advantages

3.1 PTFE + Random Glass Microfibers

PTFE provides inherently low loss and chemical inertness. Random microfibers boost mechanical strength, dimensional stability, and machinability while preserving electrical isotropy—avoiding Dk variation between warp and weft directions seen in woven glass substrates.

3.2 Ultra-Low Loss

Among reinforced PTFE laminates, RT/duroid 5870 offers the lowest electrical loss, making it superior to many competing materials for long-reach RF links, high-Q filters, and antenna arrays where efficiency directly impacts link budget and noise performanceRogers Corporation.

3.3 Excellent Chemical Resistance

Stable against acids, alkalis, solvents, and plating chemistries used in PCB manufacturing. This ensures consistent plating adhesion, via reliability, and yield without degradation of electrical propertiesRogers Corporation.

3.4 Low Moisture Sensitivity

Near-zero moisture uptake prevents Dk/Df drift in humid environments, a common failure mode in airborne, marine, and outdoor basestation equipment.

4. Why Choose RT/duroid 5870 CCL?

• Stable Dk over wide frequency: Predictable performance from HF to mmWave
• Lowest loss in reinforced PTFE: Maximizes efficiency and range
• Isotropic properties: Improves impedance consistency and reduces signal skew
• Excellent machinability: Supports drilling, routing, and plating with good yields
• Proven reliability: Mature, widely qualified in aerospace and defense
• Environmental ruggedness: Low moisture, high chemical resistance

5. Standard Configurations & Availability

RT/duroid 5870 material is commercially available in a wide range of thicknesses and panel sizes. For this specific design (0.010" or 0.254mm), the manufacturing tolerances are tightly controlled.

Conclusion

The RT/duroid 5870 laminate is the material of choice for engineers who require consistent, predictable, and ultra-low-loss performance from DC to millimeter-wave frequencies. Our PCB built on0.010” (0.254 mm) RT/duroid 5870 core leverages all these advantages, offering a ready-to-use solution for prototype or production runs. For further technical support or custom stackups, please contact our application engineering team.