Rogers 20mil DiClad 527 PCB 2-layer Immersion Gold No Solder Mask Black Silkscreen

 Rogers 20mil DiClad 527 PCB 2-layer Immersion Gold No Solder Mask Black Silkscreen

1. Product Overview

This product is a rigid double-sided high-frequency printed circuit board built on Rogers DiClad 527 woven fiberglass-reinforced PTFE substrate with a 0.508mm (20mil) core dielectric, finished with electroless nickel immersion gold (ENIG) surface treatment. Tailored for RF, microwave, and phased array industrial applications, this DiClad 527 PCB strikes a balanced performance tradeoff between ultra-low high-frequency signal loss, superior dimensional stability, and manufacturability—differentiating it from standard FR-4, low-fiberglass PTFE laminates, and entry-level microwave PCBs.

Unlike conventional high-PTFE microwave substrates prone to thermal creep and dimensional shift during multi-step fabrication, Rogers DiClad 527’s elevated fiberglass-to-PTFE ratio delivers mechanical rigidity close to traditional circuit materials while retaining the stable low-loss electrical properties required for 1 MHz to 30 GHz broadband operation. The 2-layer simple stackup eliminates complex interlayer registration risks, while immersion gold surface finish guarantees flat solder pads for SMT component assembly, consistent contact resistance, and long-term oxidation resistance. All production processes comply with IPC-Class-2 industrial reliability standards, with 100% full electrical continuity and isolation testing implemented before shipment to eliminate open/short circuit defects.

This technical brief systematically breaks down the 20mil DiClad 527 PCB’s construction, stackup, circuit layout statistics, manufacturing specifications, performance differentiation, and applicable end markets, followed by a standalone comprehensive technical deep dive into the DiClad 527 copper-clad laminate (CCL) base material with full datasheet tables, frequency characteristic charts, and material mechanism analysis.

2. PCB Construction Details

The following table summarizes the core construction parameters that define this PCB’s physical and manufacturing specifications.

3. PCB Stackup

The layer stackup defines the vertical construction of the board, with copper layers symmetrically arranged around theDiClad 527 dielectric core.

4. PCB Statistics

The following statistics quantify the board’s complexity, component density, and interconnect architecture.

5. Design Features and Differentiating Attributes

5.1 The DiClad 527 Advantage

What distinguishes this PCB from conventional high-frequency boards is its foundation on DiClad 527. Unlike non-woven PTFE-based laminates, DiClad 527 employs precision-woven fiberglass reinforcement. This woven structure provides far greater dimensional stability than non-woven alternatives, minimizing substrate movement during thermal cycles and lamination processes. The controlled, cloth-based construction also ensures excellent dielectric constant uniformity across the entire panel—a critical factor for the consistent performance of sensitive components like filters, couplers, and low-noise amplifiers.

5.2 Immersion Gold (ENIG) Surface Finish

The immersion gold finish (Electroless Nickel Immersion Gold) provides several key advantages for this high-frequency application:

• Excellent solderability–ENIG offers a flat, uniform surface that promotes reliable solder joint formation, essential for the 41 SMT components.
• Superior corrosion resistance–The gold layer protects the underlying nickel and copper from oxidation, ensuring long-term reliability even in demanding environments.
• Wire bonding compatibility–ENIG surfaces are compatible with both soldering and aluminum wire bonding, offering flexibility in assembly.
• RoHS compliance–ENIG is a lead-free finish, meeting modern environmental compliance requirements.

6. Application Suitability

The combination of DiClad 527’s electrical properties and this 20mil Rogers PCB’s precision fabrication makes it suitable for a range of demanding high-frequency applications:

• Radar Feed Networks
• Commercial Phased Array Networks
• Low-Loss Base Station Antennas
• Guidance and Missile Systems
• Digital Radio Antennas
• Filters, Couplers, and Low-Noise Amplifiers

7. Conclusion

This 20mil DiClad 527 2-layer immersion gold PCB represents a carefully engineered solution for high-frequency applications where signal integrity, dimensional stability, and low loss are non-negotiable requirements. Built on Rogers’precision-woven fiberglass/PTFE composite, the board delivers dielectric constant stability of 2.40–2.60 across frequency, a dissipation factor of just 0.0017 at 10 GHz, and exceptional dimensional stability with X/Y CTE of 14/21 ppm/°C. The 1oz copper layers, 20μm via plating, and ENIG surface finish ensure robust electrical and mechanical performance, while the IPC-Class-2 fabrication standard and 100% electrical testing guarantee quality and reliability.

For engineers designing RF and microwave circuits that demand consistent, predictable performance across temperature, frequency, and environmental conditions, this DiClad 527 high frequency PCB offers a proven foundation that balances the low-loss advantages of PTFE with the mechanical robustness of woven fiberglass reinforcement.

CCL Knowledge Base: Rogers DiClad 527 Laminate

1. Material Overview

Rogers DiClad 527 laminates are woven fiberglass-reinforced PTFE (polytetrafluoroethylene) composite materials engineered for use as high-performance printed circuit board substrates. The DiClad series represents a family of laminates where precise control of the fiberglass-to-PTFE ratio enables a range of dielectric constant choices—from the lowest Dk and dissipation factor to more highly reinforced laminates with superior dimensional stability.

DiClad 527 substrate specifically employs a higher fiberglass reinforcement ratio than many other PTFE-based laminates. This carefully controlled ratio provides a higher dielectric constant range (2.40–2.65) while delivering mechanical properties that approach conventional substrates like FR-4. The woven fiberglass reinforcement offers greater dimensional stability than non-woven fiberglass reinforced PTFE laminates of similar dielectric constants, while the coated fiberglass plies in DiClad materials are aligned in the same direction.

1.1 Key Features

• Dk range of 2.40 to 2.60 at 10 GHz and 1 MHz (50% RH)
• Dissipation factor of 0.0017 at 10 GHz, 0.0010 at 1 MHz (50% RH)
• Thermal Coefficient of Dk (TcDK) of -153 ppm/°C from -10°C to 140°C at 10 GHz
• Low moisture absorption of just 0.03%
• CTE of 14 ppm/°C (X-axis), 21 ppm/°C (Y-axis), and 173 ppm/°C (Z-axis)

1.2 Key Benefits

• Extremely low loss tangent–Minimal signal distortion and maximized signal integrity
• Excellent dimensional stability–Consistent performance across thermal cycles
• Product performance uniformity–Reliable, repeatable results
• Electrical properties highly uniform across frequency–Simplifies design across the EM spectrum
• Consistent mechanical performance–Predictable handling and processing
• Excellent chemical resistance–Withstands harsh processing and operating environments
• Stable Dk over wide frequency range–Enables scalable design from MHz to GHz
• Low circuit losses at high frequency–Improves system efficiency
• Negligible performance drift in high humidity–Reliable operation in diverse environments

2. Standard Offerings

Rogers offers DiClad 527 in the following standard configurations:

The 0.020" (0.508mm) thickness used in this PCB represents the thinnest standard offering, enabling compact, lightweight designs while maintaining the material’s full electrical and mechanical property set.

3. Complete Properties Table

The following comprehensive table presents all key properties of DiClad 527 laminate as specified in Rogers’official data sheet, with test conditions and methods.

Note: Typical values are representations of average values for the population of the property. For specification values, contact Rogers Corporation.

4. Frequency Stability Characteristics

DiClad 527 material exhibits exceptional stability of dielectric constant and dissipation factor across frequency. This characteristic, demonstrated through free-space and circular resonator cavity measurements, highlights the inherent robustness of Rogers’laminates across the electromagnetic spectrum. The stability of Dk over frequency simplifies the final design process when working across the EM spectrum and ensures easy design transition and scalability. Similarly, the stability of dissipation factor across frequency provides a stable platform for high-frequency applications where signal integrity is critical to overall system performance.

This frequency stability is a key differentiator from many competing PTFE-based substrates, where Dk and loss tangent can vary significantly with frequency, complicating wideband design and requiring extensive characterization.