# Rogers RO4350B Datasheet & Material Guide for RF PCB Designers

_Published: 2025-12-05_

Table of Contents

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- What Is Rogers RO4350B Material?
- What Is RO4350B Used for in RF PCB Applications?
- Rogers RO4350B Datasheet: Full Material Properties Overview
- RO4350B Thermal Conductivity
- RO4350B Thickness Options & Common Stack-Up Selections
- RO4350B vs FR-4: Differences in RF Performance
- Rogers 4000 Series Materials Overview
- Which Rogers Materials Can Be Used for RF & Microwave PCB?
- RO4350B PCB Manufacturing Considerations
- Why EBest Circuit (Best Technology) Is Preferred for RO4350B PCB Fabrication?
- FAQs

If you are working on [RF or microwave PCB design](https://www.bestpcbs.com/blog/2025/12/common-microwave-pcb-faqs-rf-microwave-pcb-solutions/), the material you choose directly impacts signal loss, phase stability, thermal performance, and overall system reliability. Rogers RO4350B is one of the most widely used high-frequency laminates in telecom, radar, 5G, satellite, and advanced wireless systems. This guide provides a complete breakdown of RO4350B datasheet properties, thickness options, RF advantages, and a comparison against FR4—plus practical manufacturing notes for PCB engineers.

## What Is Rogers RO4350B Material?

[Rogers RO4350B](https://www.bestpcbs.com/blog/2025/12/rogers-ro4350b-datasheet-amp-material-guide-for-rf-pcb/) is a hydrocarbon-ceramic, glass-reinforced laminate engineered for RF and microwave applications from the Rogers RO4000® series. Unlike PTFE-based laminates, RO4350B can be fabricated using standard FR4 PCB processes—a huge benefit for cost, lead time, and manufacturability—while still delivering excellent electrical stability at GHz frequencies.

**Key characteristics:**

- Dk = 3.48 ± 0.05 (10 GHz, z-axis)
- Df ≈ 0.0037 (low loss)
- High thermal stability
- Low moisture absorption (