Custom 2-Layer 5mil CLTE-AT PCB with Immersion Gold Finish built on Rogers CLTE-AT laminate designed for RF,

Custom 2-Layer 5mil CLTE-AT PCB with Immersion Gold Finish

Introducing a high-performance 2-layer PCB, built on Rogers CLTE-AT laminate, designed for advanced RF, microwave, and phase-sensitive applications. This PCB leverages the ceramic/PTFE composite properties of CLTE-AT for dimensional stability, superior signal integrity, and thermal performance. The immersion gold finish (ENIG) ensures excellent solderability and corrosion resistance, providing long-term reliability for critical designs. Manufactured to IPC-Class-2 standards, this PCB is ideal for automotive radar, adaptive cruise control, and RF filter applications.

PCB Construction Details

This double-sided CLTE-AT PCB is optimized for high-frequency applications with a focus on stability and precision. Here are the detailed specifications:

PCB Stackup

The stackup is carefully designed to ensure stable electrical performance and low insertion loss, critical for RF and microwave applications:

The CLTE-AT core ensures tight dielectric constant control, low loss tangent, and outstanding thermal stability, making it ideal for applications requiring phase and temperature stability.

PCB Statistics

This PCB is configured to optimize space and performance with the following layout features:

The Gerber RS-274-X format ensures high-precision artwork for fabrication.

About Rogers CLTE-AT Laminate

The CLTE-AT laminate is a micro-dispersed ceramic/PTFE composite with woven glass reinforcement. It is engineered for thermally and mechanically robust applications, providing superior signal integrity, low loss tangent, and excellent dimensional stability.

Key Features of CLTE-AT:

• Dielectric Constant (Dk): 3.00 ± 0.04, ensuring consistent impedance control.
• Dissipation Factor (Df): 0.0013, achieving lowest insertion loss in its class.
• Thermal Conductivity: 0.64 W/mK, enabling efficient heat transfer.
• CTE (Coefficient of Thermal Expansion): X-axis: 8 ppm/°C, Y-axis: 8 ppm/°C, Z-axis: 20 ppm/°C
• Thermal Stability: Phase stability across -55°C to 150°C operating range.
• Moisture Absorption: 0.03%, ensuring stability in humid environments.
• Decomposition Temperature (Td): 425°C, providing high durability under thermal stress.
• Flammability: UL 94-V0, meeting safety standards.

CLTE-AT laminates are known for their dimensional reliability, low roughness copper adhesion, and ease of processing compared to other ceramic/PTFE substrates.

Benefits of CLTE-AT-Based PCBs

With an ultra-low dissipation factor (Df) of 0.0013 and low insertion loss, the PCB ensures minimal signal degradation at high frequencies.

The woven glass reinforcement provides mechanical robustness and dimensional precision, critical for complex multilayer designs.

The high thermal conductivity (0.64 W/mK) and low CTE values ensure stable performance across a wide temperature range.

The CLTE-AT laminate supports standard PCB processes and provides excellent peel strength without requiring rougher coppers, making it easier to fabricate.

With minimal moisture absorption (0.03%) and resistance to chemicals, the PCB is highly reliable in harsh environments.

The immersion gold (ENIG) surface finish ensures excellent solderability, wire-bonding compatibility, and corrosion resistance.

Application Scenarios

This 5mil CLTE-AT PCB is suited for a wide variety of high-frequency and temperature-sensitive applications, including:

1. Automotive Radar and Adaptive Cruise Control
2. Microwave and RF Applications
3. Phase-Sensitive Antennas
4. RF and Microwave Filters
5. Temperature-Sensitive Electronics

Conclusion

The 2-layer 5mil CLTE-AT PCB with Immersion Gold finish is a cutting-edge solution for RF, microwave, and automotive radar applications. Its exceptional dielectric properties, thermal stability, and low insertion loss make it a top choice for industries requiring precision and durability. Manufactured to IPC-Class-2 standards and 100% electrically tested, this PCB is designed to exceed performance expectations.

For more information or to discuss custom designs, contact us today. Let us help you bring your high-frequency applications to life!