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Rogers PCB

Rogers RO4350B Microwave RF PCB

Drilling Diameter: ≥0.1mm

Aperture Tolerance: ±0.05mm

Hole Position Tolerance: ±0.05mm

Inner Core Thickness: 0.1-4.0mm

Inner Layer Trace/Space: 2.5mil/3mil

Hole Wall Copper Thickness: 20-50um

Nickel Thickness: ≥120u

Gold Thickness: 1-5u


4-layer Rogers 4350B RF PCB is a high-performance high-frequency circuit board, and its performance characteristics mainly include:

Low Dielectric Constant:

Rogers 4350B material has a low dielectric constant (Dk), usually around 3.48, which helps to reduce delays during signal transmission.

Stable Dielectric Properties:

The dielectric constant changes little with frequency and temperature, providing good electrical performance stability.

Low Dielectric Loss:

The dielectric loss factor (Df) is low, usually around 0.005, which helps to reduce signal loss during transmission.

Excellent Thermal Properties:

It has a low thermal expansion coefficient and good thermal conductivity, suitable for use in environments with large temperature changes.

Good Mechanical Properties:

Due to the presence of ceramic and woven glass reinforcements in the material, it has high mechanical strength and wear resistance.

Excellent Processing Performance:

Standard epoxy resin/glass cloth processing technology can be used, which is easy to mass produce and multi-layer mixed pressing.

High Frequency Applications:

Suitable for high-frequency applications such as millimeter wave radar, 5G communication, advanced driver assistance system (ADAS), etc.

Good Impedance Control:

The uniformity of the material helps achieve precise impedance control, which is essential for high-speed signal transmission.

Environmental Stability:

It can maintain stable electrical properties under different environmental conditions, such as humidity and temperature changes.

Flame Retardant Performance:

It usually has a high flame retardant rating, such as V-0, to meet strict safety standards.

Surface Treatment:

Surface treatment such as chemical gold immersion provides good soldering performance and anti-oxidation protection.


Due to its excellent electrical and mechanical properties, the 4-layer Rogers 4350B RF PCB has high reliability and is suitable for long-term use.

High Heat Resistance:

The material has high heat resistance and is suitable for working in high temperature environments, meeting the thermal performance requirements of some specific applications.

Low Water Absorption:

Low water absorption helps to keep the electrical properties of the material unaffected by environmental humidity.

High Volume Resistivity and Surface Resistivity:

Provides good insulation performance and reduces the risk of leakage and crosstalk.

Low Z-axis Thermal Expansion Coefficient:

Helps reduce thermal stress in multi-layer PCBs and improve product reliability.

Low Internal Expansion Coefficient:

Helps maintain the stability of circuit board dimensions and reduce deformation caused by temperature changes.

Easy to Design:

The material properties allow RF engineers to conveniently design circuits, such as network matching and impedance control of transmission lines.

Excellent Electromagnetic Compatibility:

Low dielectric constant and dielectric loss help improve the electromagnetic compatibility of circuits.

Timely Availability of Materials:

For some high-frequency boards, the procurement cycle may be long, but Rogers 4350B is usually in stock and can be obtained in a timely manner.


Although it is a high-performance material, Rogers 4350B provides better cost-effectiveness than some traditional microwave materials.

Environmental Regulatory Compatibility:

Complies with environmental regulations such as RoHS, suitable for markets that need to meet specific environmental standards.

Multiple Application Scenarios:

In addition to the applications mentioned above, it is also suitable for occasions such as test and measurement equipment, medical equipment, etc. that require high-performance circuit boards.

Long-term Reliability:

The long-term stability and durability of the material ensure the reliability of the circuit board in long-term use.


When producing 4-layer Rogers 4350B RF PCB, the following considerations need to be considered to ensure product quality and performance:

Material Selection:

Make sure to use genuine Rogers 4350B materials and avoid using counterfeit or inferior materials.

Material Specification Consistency:

Ensure the consistency of material thickness, dielectric constant and other specifications to ensure the performance of the circuit board.

Process Planning:

Design planning and process planning are carried out by professional process technicians to ensure the rationality of the processing plan.

Quality Control:

Perfect quality control capabilities ensure that all products are strictly tested for performance indicators before leaving the factory.

Processing Accuracy:

Use advanced production equipment, such as plasma cleaning machines and laser laser exposure machines, to ensure the processing accuracy of circuits and holes.

Surface Treatment Process:

Ability to produce various surface treatment processes, such as immersion gold, gold plating, immersion tin, etc., to meet different application requirements.

Impedance Control:

Strictly control impedance to ensure impedance continuity and matching in circuit design.

Thermal Management:

Pay attention to thermal management to avoid changes in material properties due to excessive temperature.

Environmental Ccontrol:

Keep the production environment clean and stable to avoid the impact of dust and humidity on the product.

Electromagnetic Compatibility Test:

Electromagnetic compatibility test of finished products to ensure the compatibility of products in actual applications.

Stress Test:

Stress test is performed to evaluate the reliability of circuit boards under mechanical stress.

Batch Management: 

Strict batch management ensures the consistency and traceability of each batch of products.

Operator Training: 

Provide professional training for operators to ensure that they are familiar with the production process and quality standards.

Equipment Maintenance: 

Regularly maintain and calibrate production equipment to ensure the accuracy and stability of the equipment.

Design Rule Check: 

Perform design rule check (DRC) before production to ensure that the design meets production requirements.

Process Documentation: 

Keep detailed records of the production process to facilitate problem tracking and continuous improvement.

Timely Availability of Materials: 

Communicate with suppliers in advance to ensure the timely supply of high-frequency boards.

Cost Factors: 

Consider the price sensitivity of the product and choose appropriate materials and production processes.

Applicability of Laws and Regulations: 

Ensure that the product meets the environmental protection regulations of different countries, such as RoHS standards.


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