10mil Rogers CuClad 250 Immersion Gold 2-Layer Rigid Microwave PCB

10mil Rogers CuClad 250 Immersion Gold 2-Layer Rigid Microwave PCB

Executive Summary

This 2-layer rigid high-frequency PCB adopts Rogers 10mil (0.254mm) CuClad 250 cross-plied PTFE woven fiberglass core paired with electroless nickel immersion gold (ENIG) surface treatment, engineered for low-loss microwave, radar and electronic countermeasure circuits. Manufactured per IPC-Class-2 reliability standards, the board integrates controlled thin 0.4mm finished thickness, precision 4/6mil minimum trace/space, single-side blue solder mask and white top silkscreen, with full 100% electrical continuity testing prior to delivery. Distinctive differentiators include fully isotropic X-Y electrical/mechanical performance exclusive to CuClad cross-plied construction, ultra-stable Dk/Df across 1–30GHz frequency bands, NASA-compliant ultra-low outgassing, and robust 14 lbs/in copper peel strength for long-term thermal cycling reliability.

Separated into PCB hardware specification module and underlying CuClad 250 CCL substrate technical deep dive, this document delivers fully verified datasheet data, structured parameter tables, application segmentation and conclusive performance summaries without redundant content or exaggerated performance claims.

Part 1: PCB Board Detailed Technical Specification

1.1 Overview of PCB Construction Specifications

This table consolidates all dimensional, manufacturing, surface treatment and quality control parameters of the finished board to standardize production and design reference.

1.2 PCB Internal Stackup Structure Table

This table illustrates the symmetrical 2-layer rigid dielectric stack-up based on 10mil CuClad 250 core, clarifying copper foil and core thickness distribution for impedance simulation reference.

1.3 PCB Circuit Statistics Table

This table quantifies all circuit metallization features of the finished PCB to support component placement, assembly and electrical verification workflows.

1.4 Core Differentiated Advantages of This CuClad 250 Immersion Gold PCB

1)Ultra-Low High-Frequency Insertion Loss Foundation

Built on CuClad 250 with Df=0.0017 at 10GHz, the board delivers far lower signal attenuation than FR-4 (Df≈0.02 at 10GHz). The cross-plied core guarantees uniform Dk (2.40–2.55) across X-Y axes, eliminating phase skew common in unidirectional non-woven PTFE substrates for phased array radar and coupler designs.

2) Immersion Gold Surface Finish Optimized for RF Contact

Immersion gold forms a flat, oxidation-resistant contact surface without uneven surface height defects of HASL tin-lead finish. It maintains stable low contact resistance over long-term storage, ideal for repeatedly mated RF test ports and precision SMT microwave chips. The nickel barrier layer prevents copper diffusion into gold to avoid intermetallic compound degradation under continuous RF power load.

3) Ultra-Thin 0.4mm Finished Thickness with Robust Mechanical Stability

Most thin RF PTFE boards suffer severe dimensional drift during thermal cycling, but CuClad 250’s high fiberglass-to-PTFE ratio delivers CTE X=18 ppm/°C, Y=19 ppm/°C, far lower than low-glass PTFE laminates. The 1oz copper foil with 20μm via plating guarantees barrel crack resistance during multiple reflow cycles.

4) Single-Sided Mask & Silkscreen Design Reduces Dielectric Interface Loss

By omitting bottom solder mask and silkscreen, the board removes extra polymer dielectric layers on the ground plane side, lowering parasitic capacitance and improving grounding performance for microwave signal grounding networks.

1.5 Typical Target Applications of This PCB

• Military radar front-end receiver circuits, phased array antenna feed networks
• Electronic Countermeasures (ECM) & Electronic Support Measure (ESM) signal processing modules
• Microwave passive components: LNAs, bandpass filters, directional couplers, power dividers

1.6 PCB Section Conclusion

This 2-layer 10mil CuClad 250 immersion gold PCB combines ultra-low-loss cross-plied PTFE substrate, precision controlled thin stack-up, corrosion-resistant immersion gold finishing and full electrical validation, forming a balanced high-frequency circuit solution that bridges high RF performance and manufacturable mechanical stability. Its single-sided assembly layout, simplified mask configuration and tight dimensional tolerances deliver unique differentiation from generic FR-4 and standard thin PTFE PCBs, specifically tailored for phase-sensitive microwave and defense electronic systems.

Part 2: In-Depth Technical Knowledge of Rogers CuClad 250 Copper-Clad Laminate (CCL)

2.1 CuClad 250 Material Overview

CuClad 250 is a proprietary cross-plied woven fiberglass reinforced PTFE composite copper-clad laminate developed by Rogers Corporation, designed to strike a unique balance between ultra-low high-frequency dielectric loss and mechanical rigidity superior to conventional non-woven PTFE substrates. Unlike unidirectional fiberglass PTFE materials, alternating woven fiberglass plies are stacked at 90°cross orientation, delivering true electrical and mechanical isotropy across the entire X-Y plane—an exclusive feature of theCuClad series unavailable in competing PTFE laminates. Its elevated fiberglass-to-PTFE loading ratio improves dimensional stability and cuts thermal expansion coefficients in all axes, solving the warpage and dimensional drift pain points of low-glass PTFE substrates during PCB fabrication and thermal cycling.

The Rogers material maintains stable dielectric constant (Dk) and dissipation factor (Df) across 1MHz to 30GHz broadband frequency range, eliminating design rework caused by frequency-dependent dielectric drift. It also passes NASA low-outgassing standards, UL94-V0 flammability certification and exhibits minimal water absorption, making it suitable for airborne, space-adjacent and outdoor microwave equipment with strict environmental tolerance requirements.

2.2 Full Official Datasheet Property Table for CuClad 250

All test methods, conditions and typical values follow Rogers official datasheet and IPC industry standard testing protocols:

2.3 Unique Material Features & Engineering Benefits of CuClad 250

1) Core Structural Feature: Cross-Plied Woven Fiberglass Construction

Alternating fiberglass cloth layers are rotated 90°between each ply, delivering identical electrical and mechanical performance on X and Y axes. For phased array antenna and balanced coupler designs, this isotropy removes phase imbalance caused by directional Dk deviation, a critical performance edge over single-orientation woven PTFE laminates.

2) Low Dielectric Loss & Broadband Dk Stability

Df=0.0017 at 10GHz delivers minimal signal insertion loss for high-frequency transmission lines. Dk variation remains below 1% across 0–30GHz frequency sweep, simplifying impedance simulation and enabling scalable multi-band RF circuit design without iterative layout modification.

3) Superior Mechanical & Environmental Robustness

14 lbs/in copper peel strength resists foil lifting during PCB routing, drilling and reflow. Ultra-low 0.03% moisture absorption eliminates Dk shift in high-humidity operating environments; NASA-compliant zero CVCM outgassing prevents volatile contamination in sealed radar and aerospace equipment. Elevated fiberglass loading brings tensile modulus and dimensional stability close to conventional FR-4, reducing manufacturing scrap rates common with brittle pure PTFE substrates.

4) Customizable Supply Options

CuClad 250 raw sheets are available with 0.5oz, 1oz or 2oz electrodeposited copper foil, with optional bonded metal heat sink backplanes (aluminum, brass, copper) for high-power RF amplifier thermal dissipation. Special LX testing grade is available for critical aerospace orders, where each laminate panel undergoes destructive testing with individual material test reports issued per shipment. Standard master sheet dimension is 36” ×36”cross-plied format for panelized PCB mass production.

Figure 1

Demonstrates the stability of Dielectric Constant across frequency. This information was correlated from data generated by using a free space and   circular resonator cavity. This characteristic

demonstrates the inherent robustness of Rogers, laminates across frequency, thus simplifying the final design process when working across EM

spectrum. The stability of the Dielectric Constant of CuClad 250 laminate over frequency insures  easy design transition and scalability of design.

Figure 2

Demonstrates the stability of Dissipation Factor across frequency. This characteristic

demonstrates the inherent robustness of Rogers, laminates across frequency, providing a stable

platform for high frequency applications where signal integrity is critical to the overall

performance of the application.

2.4 CCL Section Conclusion

Rogers CuClad 250 cross-plied PTFE woven fiberglass laminate fills the market gap between ultra-low-loss low-glass PTFE substrates and rigid conventional thermoset dielectrics. Its exclusive X-Y isotropy, stable broadband dielectric parameters, low thermal expansion and NASA-grade low-outgassing properties create irreplaceable differentiation for phase-sensitive microwave and defense electronics. The complete standardized datasheet performance indicators provide fully traceable technical data for PCB design simulation, reliability qualification and customer technical verification, forming the fundamental high-frequency performance foundation of the finished 10mil immersion gold PCB introduced above.

Overall Final Conclusion

This 10mil CuClad 250 2-layer RF PCB represents a highly targeted high-frequency circuit solution built upon Rogers CuClad 250’s proprietary cross-plied PTFE substrate technology. Separated independent PCB finished product and raw CCL material modules avoid redundant description while delivering layered technical depth: the PCB module specifies standardized dimensional, stack-up and circuit statistics tables to clarify manufacturing and assembly parameters, highlighting immersion gold finishing, thin symmetrical stack-up and full electrical testing as production-level differentiated advantages; the CuClad 250 CCL module attaches full official datasheet performance tables, elaborates unique cross-plied structural mechanisms, broadband dielectric stability and environmental compliance indicators to trace the root source of the board’s superior microwave performance.

All technical data strictly aligns with original Rogers datasheets and internal PCB production specifications without performance exaggeration. The product’s dual core strengths—low-loss isotropy from CuClad 250 raw material and high-reliability precision manufacturing from immersion gold surface treatment and IPC-Class-2 control—make it a mature, verifiable solution for radar, ECM, ESM and passive microwave component applications, with complete worldwide supply chain support to meet global military and commercial high-frequency electronic project demands.