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Rogers PCB

4-Layer Rogers 4350B PCB


Dielectric thickness: 0.508mm

Dielectric constant: 3.48

Thermal conductivity: 0.69W/m·K

Flame retardant grade: V-0

Volume resistivity: 1.2×10^10Ω·cm

Surface resistivity: 5.7×10^9Ω/sq

Density: 1.9g/cm^3

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The performance characteristics of 4-layer Rogers 4350B PCB are as follows:

Good high frequency performance, suitable for high-frequency circuit design above 500MHz. RO4350B material allows RF engineers to easily design circuits, such as network matching, impedance control of transmission lines, etc.

Low dielectric loss, has advantages in high frequency applications. The dielectric constant of RO4350B has almost the lowest temperature fluctuation among similar materials, and its dielectric constant is also quite stable at 3.48 over a wide frequency range.

LoPro copper foil can be used to reduce insertion loss and is suitable for broadband applications.

The coefficient of thermal expansion (CTE) is similar to that of copper, providing excellent dimensional stability, which is particularly important for multi-layer circuit design. The low Z-axis CTE expansion coefficient ensures the quality of through-holes in the board.

The processing technology is basically similar to that of ordinary FR4 boards, and no special through-hole pretreatment process is required, and it can be processed using an automated process system.

Sheet Specifications:

Dielectric thickness: 0.508mm

Dielectric constant: 3.48

Thermal conductivity: 0.69W/m·K

Flame retardant grade: V-0

Volume resistivity: 1.2×10^10Ω·cm

Surface resistivity: 5.7×10^9Ω/sq

Density: 1.9g/cm^3

Surface Process: 

Chemical gold immersion

Can be used for automotive 77GHz millimeter wave radar circuit boards, advanced driver assistance systems (ADAS), 5G wireless infrastructure and other applications.

High Reliability: 

Due to its excellent electrical properties and thermal stability, RO4350B material can provide long-term reliability, especially for applications that require continuous and stable operation, such as automotive radar systems.

Good Mechanical Properties: 

RO4350B material has a high Tg value (greater than 280°C), which ensures good dimensional stability and mechanical strength throughout the sheet processing process.

Environmental Characteristics: 

RO4350B material uses RoHS-compliant flame retardant technology, which is beneficial to environmental protection and human health.

Design Flexibility: 

Because of its similar processing technology to FR4, RO4350B material allows designers to maintain design flexibility in high-frequency applications.

Excellent Dielectric Properties: 

The dielectric constant of RO4350B material is very stable, which helps achieve precise impedance control and is critical for RF and microwave circuit design.

Low Water Vapor Transmission Rate: 

RO4350B material has a low water vapor transmission rate, which helps to improve the durability and long-term stability of PCB.

Customizability: 

Depending on application needs, RO4350B materials can be customized to meet specific electrical and mechanical performance requirements.

Compatibility: 

RO4350B material is compatible with a variety of surface treatment processes, such as electroless immersion gold, electroless nickel gold plating, etc., to adapt to different circuit design needs.

Extensiveness of High Frequency Applications: 

In addition to automotive radar and 5G communications, RO4350B material is also suitable for high frequency circuit design in satellite communications, aerospace, medical equipment and other fields.

These performance features make the 4-layer Rogers 4350B PCB ideal for high frequency circuit design in high-performance electronic systems.

PCB-49

What are the precautions during production?

When producing 4-layer Rogers 4350B PCB, you need to pay attention to the following aspects to ensure product quality and performance:

Material Selection: 

Make sure that genuine Rogers RO4350B material is used, because its high-frequency performance and low-loss characteristics are critical to the performance of the circuit.

Board Processing: 

Before processing, the board needs to be carefully inspected for damage, scratches or contamination, which may affect the performance of the final product.

Drilling and Through-hole Processing: 

Due to the characteristics of RO4350B material, special attention needs to be paid to drilling and through-hole processing to avoid damaging the board and affecting electrical performance.

Lamination Process: 

Lamination is a key step in the production of multi-layer PCBs, and temperature, pressure and time need to be precisely controlled to ensure good adhesion and electrical performance between layers.

Impedance Control: 

The dielectric constant of RO4350B material has a significant impact on impedance, so impedance needs to be precisely controlled during design and production.

Surface Treatment: 

Select a suitable surface treatment process (such as chemical gold plating, chemical nickel gold plating, etc.) to meet the electrical performance and environmental adaptability requirements of the circuit.

Thermal Management: 

During the production process, the heating rate and temperature need to be controlled to prevent the material from being damaged due to overheating.

Environmental Control: 

Keep the production environment clean to avoid dust and pollutants from damaging the PCB.

Quality Inspection: 

Regular quality inspections are carried out during the production process, including impedance testing, thermal performance testing, mechanical performance testing, etc., to ensure that the products meet the specifications.

Operation Training: 

Operators need to receive proper training to understand the characteristics of RO4350B materials and best practices in the production process.

Design Rules: 

Follow design rules such as line width and line spacing, via design, etc. to avoid problems in the production process.

Storage Conditions: 

Before and after production, ensure that the boards are stored in appropriate conditions to avoid humidity and temperature changes that affect material properties.

Supply Chain Management: 

Ensure the stability of the supply chain to obtain high-quality raw materials and components.

Environmental Requirements: 

Comply with relevant environmental regulations to ensure that the production process and materials meet environmental standards.

By following these precautions, you can ensure that the production process of 4-layer Rogers 4350B PCBs goes smoothly and the final product can meet the high-performance requirements of high-frequency circuit design.

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