The Rogers RO4000® Series materials, including RO4350B and RO4003C, are high-frequency circuit materials designed for applications where superior electrical performance is required. These materials are hydrocarbon ceramic laminates that provide low dielectric loss and stable dielectric constant over a broad frequency range, making them ideal for RF microwave circuits, controlled impedance transmission lines, and broadband applications. The RO4000 Series materials can be processed using standard FR-4 fabrication techniques, which is a significant advantage as it does not require the specialized via preparation processes needed for PTFE-based materials【4:0†RO4000-datasheet.pdf】.

For PCB stackup design using RO4000 Series materials, the following considerations should be kept in mind:

• The thermal coefficient of expansion (CTE) of RO4000 materials is similar to copper, which provides excellent dimensional stability. This is crucial for maintaining the integrity of plated through-holes, especially in environments subject to thermal shock【4:0†RO4000-datasheet.pdf】.
• RO4000 materials have a high glass transition temperature (Tg) of over 280°C, ensuring that the material's expansion characteristics remain stable across the entire range of PCB processing temperatures【4:0†RO4000-datasheet.pdf】.
• The materials are available in various configurations, including different glass styles and thicknesses, which can be selected based on specific design requirements and electrical performance specifications【4:0†RO4000-datasheet.pdf】.

When designing PCBs for high-frequency applications, it is also important to consider the dielectric constant and dissipation factor of the material, as these properties significantly affect the impedance and signal integrity of the circuit. The RO4000 Series offers low dielectric tolerance and low loss, which are beneficial for applications requiring high operating frequencies. Additionally, the materials are CAF resistant and compatible with volume manufacturing processes, making them suitable for high-volume and performance-sensitive applications【4:0†RO4000-datasheet.pdf】.