All Categories
Rogers PCB

2-Layer F4B Immersion Gold 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


2-layer F4B gold immersion PCB is a special type of printed circuit board (PCB) that uses F4B (polytetrafluoroethylene, also known as Teflon) as the substrate material and the gold immersion process as the surface treatment technology. Below are some of the key performance characteristics of2-layer F4B Gold Immersion PCBs:

High Frequency Signal Transmission: F4B material has a very low dielectric constant (~2.2), which makes it ideal for high frequency signal transmission applications and can reduce losses during signal transmission.

Good Electrical Conductivity: 

The immersion gold process provides good electrical conductivity, which is essential for high frequency signal transmission.

Corrosion Resistance: 

The gold layer is not easily oxidised and has good corrosion resistance, which helps to improve the durability and reliability of the PCB.

Soldering Performance: 

The gold layer has a better affinity with the solder, which is favourable for soldering and can improve the quality and consistency of soldering.


The gold layer formed by the immersion gold process has a beautiful colour and enhances the appearance of the product.


The crystal structure of the gold layer is dense and not easy to produce oxidation, which enhances the durability and reliability of the PCB.

Stress Control: 

In the manufacturing process, the immersion gold plate has more precise control of stress, which helps to improve the stability of the product.

Environmental Stability: 

F4B materials have good chemical and temperature stability, and can adapt to a variety of harsh working environments.

Reduced High Frequency Loss and Interference: 

Immersion gold process in the production of high-frequency boards can improve the quality of signal transmission, reduce signal loss and interference.

Long-term Stability: 

The waiting life of immersion gold plate is many times longer than that of lead-tin alloy plate, which is suitable for long-term stable operation of electronic equipment.


Suitable for applications requiring long-term stable operation and high requirements for soldering performance and corrosion resistance, such as wireless communications, radar systems, aerospace, medical equipment and other fields.


High Frequency Signal Transmission: 

Due to the low dielectric constant and low loss tangent of F4B material, 2-layer F4B gold immersion PCB can provide excellent high frequency signal transmission performance, reducing signal loss and interference during transmission.

Corrosion and Oxidation Resistance: 

The corrosion and oxidation resistance of the gold layer ensures the stability and reliability of the PCB in harsh environments or prolonged use.

Excellent Soldering Performance: 

The good affinity between the gold layer and the solder makes the soldering process smoother, which helps to improve the quality and consistency of the solder joints and reduce soldering defects.

Improved Product Aesthetics: 

The gold layer formed by the immersion gold process has a beautiful colour and enhances the appearance of the product.

Stress Control: 

Accurate stress control helps maintain the dimensional stability of PCBs and reduces performance changes due to thermal expansion or mechanical stress.

Environmental Adaptability: 

The chemical and temperature stability of F4B materials allows them to adapt to a variety of operating environments, including high temperature or chemically corrosive environments.

Long-term Stable Operation: 

The long standby life of immersion gold plates makes them suitable for use in electronic equipment that requires long-term stable operation.

Reduced Electromagnetic Interference: 

The low dielectric constant helps to reduce electromagnetic interference in signal transmission and improve signal integrity.

Suitable for Precision Electronics: 

Due to the above characteristics, 2-layer F4B immersion gold PCBs are suitable for precision electronics, such as medical equipment, test and measurement equipment, and satellite communication equipment.

Enhance Product Reliability: 

The combination of the immersion gold process and F4B material provides a highly reliable solution for applications with stringent circuit performance requirements.

Supports High-density Designs: 

Good solderability and material properties support high-density circuit designs, helping to enable smaller and more complex electronic device designs.

Enhances Signal Integrity: 

The immersion gold process helps maintain signal integrity, especially in high-speed or high-frequency applications, which is critical to ensuring device performance.

In summary, 2-layer F4B immersion gold PCBs are used in a wide range of electronic devices that require high performance and reliability due to their excellent electrical and physical properties.

These process capabilities demonstrate the professional strength of Shenzhen Xinchenger Electronics Co., Ltd. in the field of PCB electronics and the comprehensive satisfaction of customers' needs. The company is committed to providing customers with high-quality products and services, and has won the trust and praise of customers.


Leave a Message

Hot categories