Rogers RO4835 PCB built on 0.254mm substrate laminate 2-Layer copper weight with ENEPIG Finish for RF and microwave

RO4835 PCB 0.254mm 2-Layer with ENEPIG Finish

The RO4835 PCB is a high-performance, 2-layer circuit board built on Rogers RO4835 laminate, a cutting-edge material designed for high-frequency and high-temperature applications. With a 0.254mm dielectric thickness, 1 oz finished copper weight, and an ENEPIG surface finish, this PCB is engineered for exceptional electrical performance, thermal stability, and durability. It is ideal for use in industries such as automotive radar, point-to-point microwave systems, and phased array radar.

This PCB meets IPC-Class-2 standards and undergoes 100% electrical testing to ensure quality and reliability for a wide range of demanding applications. Its lightweight, compact design and precise manufacturing tolerances make it a cost-effective solution for performance-sensitive, high-volume applications.

Key PCB Construction Details

PCB Stackup

• Copper Layer 1: 35μm (1 oz) for high-quality signal transmission.
• RO4835 Dielectric Core: 0.254mm (10 mil) thickness, providing low dielectric loss and excellent oxidation resistance.
• Copper Layer 2: 35μm (1 oz) for consistent grounding and signal support.

RO4835 Laminate Overview

The Rogers RO4835 laminate is a hydrocarbon-based material enhanced with superior oxidation resistance for long-term reliability at high temperatures. It shares similar electrical and mechanical properties with the popular RO4350B laminate, making it an excellent option for cost-effective, high-frequency circuit fabrication. The material is designed for performance-sensitive, high-volume applications and is compatible with standard FR-4 manufacturing processes, eliminating the need for specialized treatments.

Key Features:

• Dielectric Constant (Dk): 3.48 ± 0.05 at 10 GHz
• Dissipation Factor: 0.0037 at 10 GHz
• Glass Transition Temperature (Tg): >280°C
• Coefficient of Thermal Expansion (CTE): X-axis: 10 ppm/°C, Y-axis: 12 ppm/°C, Z-axis: 31 ppm/°C
• RoHS Compliant and Lead-Free Process Compatible
• UL 94 V-0 Flame Resistance

The RO4835 laminate also features Rogers’ proprietary LoPro Reverse treated copper foil, which is ideal for applications requiring low insertion loss.

Benefits of RO4835 PCB

Low Loss and High Reliability:

The low dissipation factor ensures excellent electrical performance for applications with higher operating frequencies, such as automotive radar and RF components.

The high oxidation resistance enhances long-term stability.

Thermal and Mechanical Stability:

The low Z-axis CTE improves plated through-hole (PTH) reliability, while the low in-plane CTE ensures stability during circuit processing.

The Tg >280°C makes it highly resistant to thermal stress.

Ease of Fabrication:

Compatible with standard FR-4 processes, the RO4835 material reduces manufacturing costs while maintaining high-quality performance.

Environmentally Friendly:

The laminate is RoHS compliant and supports lead-free soldering for eco-friendly manufacturing.

Applications

Automotive Radar and Sensors

Point-to-Point Microwave Systems

Phased Array Radar

Power Amplifiers and RF Components

Conclusion

The RO4835 PCB 0.254mm 2-Layer with ENEPIG Finish is a premium circuit board designed for high-frequency and high-temperature applications. Its advanced construction, leveraging Rogers RO4835 laminate, ensures low loss, excellent thermal stability, and long-term reliability. With a compact design, precise tolerances, and compatibility with standard FR-4 processes, this PCB is the perfect choice for industries like automotive radar, phased-array radar, and RF systems, where performance and cost-efficiency are paramount.