Ro4835 + FR4 High Frequency Hybrid PCB

Rogers RO4835 substrate is a hydrocarbon ceramic laminate, an oxidation resistant high frequency material for applications requiring greater stability at elevated temperatures. It is more resistant to oxidation than other hydrocarbon-based materials. RO4835 laminates are designed to provide excellent high frequency performance and low cost circuit fabrication. Additionally, the electrical and mechanical properties of the RO4835 material are nearly identical to the RO4350B laminate that customers have used successfully for many years.

Oxidation affects all thermoset laminates over time and temperature. In the long run, oxidation causes a small increase in the dielectric constant and dissipation factor of the circuit substrate.

Features and Benefits

1. Significantly improved oxidation resistance compared to typical thermoset microwave materials, which are designed for performance-sensitive high-volume applications.

2. Low losses exhibit excellent electrical performance, allowing applications with higher operating frequencies, especially automotive applications. 

3. Tight permittivity tolerances lead to controlled impedance transmission lines

4. Lead-free process compatibility resulting in no blistering or delamination

5. Low Z-axis spread results in reliable plated through holes

6. Low in-plane expansion coefficient is stable over the entire circuit processing temperature range

7. Anti-CAF