Introduction to Immersion Gold PCB Finish

Immersion gold pcb finish is one of the most trustworthy surface treatment methods when

it comes to advanced PCB manufacturing. Immersion gold is a precious, high-end electronics 

material with the ability to be solderable, flat-surface, and has long-term oxidation resistance. 

At PCBBUY, we are capitalizing on advanced immersion gold processes to make sure every 

circuit board is of the highest standard of reliability and performance internationally.

PCB Instant Quote

Immersion Gold PCB Finish What is it?

ENIG (Electroless Nickel Immersion Gold) or immersion gold, is a finish placed on copper copper pads on a PCB. It has two important 

layers that comprise the process:

Nickel Layer (Ni):A diffusion barrier in copper which gives good mechanical strength and provides copper 

diffusion resistance.

Gold Layer (Au): This is a thick, uniform coating which covers the nickel against oxidation and is more

solderable.

Immersion gold pcb finish is more suitable than other finishes like OSP, HASL, or immersion 

silver because it provides improved flatness and shelf life, and is most appropriate when 

fine-pitch components such as BGA and CSP packages are required.

Advantages of Immersion Gold PCB Finish

Why etch an immersion gold pcb finish offers a number of advantages:

1.Superior Flatness – Perfect for high-density designs and fine-pitch components.

2.Oxidation Resistance -Guarantees the board storage and use.

3.Excellent Solderability – Ensures stable connections during SMT assembly.

4.Reliable Electrical Performance – Stable signal transmission for high-frequency circuits.

5. Prolonged Shelf Life -Longer storage before it becomes worn out than other finishes.

PCBBUY’s Expertise in Immersion Gold PCB Finish

At PCBBUY, we are specialized in precise surface finishes of PCB such as immersion gold. 

The following can be noted through our manufacturing capabilities:

•Accurate Thickness Control of Gold: Our ENIG process insures the consistency of nickel 

and gold is being used, and is reliable in large volumes of production.

•Advanced Chemical Baths: The process is frequently checked and adjusted in order to 

produce a consistent coating and eliminate flaws on the surface.

•Extensive Quality Testing: XRF thickness test, solderability test and surface inspection to 

ensure quality.

• Flexible Production: PCBBUY can respond to a variety of customer needs both in terms 

of prototype batches and large-quantity orders.

Having been in the industry since many years, we have been able to provide immersion gold 

PCBs to global customers in the automotive electronics, medical devices, and consumer 

electronics as well as 5G communication equipment.

Immersion Gold PCB Finish Process Flow at PCBBUY

We use immersion gold pcb finish:

1.Surface Cleaning and Preparation- Elimination of oxidation and contaminants to make 

copper pads.

2. Electroless Nickel Plating -an amount of nickel is deposited to create diffusion barrier and 

mechanical strength.

3.Immersion Gold Deposition - A thin layer of gold is chemically attached on the nickel 

surface, making it smooth as well as resistant to oxidation.

4.Final Inspection - With sophisticated equipment to check the plating thickness, 

solderability and surface quality.

Every stage is monitored to guarantee quality reproducibility and highest reliability.

Applications of Immersion Gold PCB Finish

The immersion gold pcb is popular in the industries where accuracy and dependability matter 

much:

• High-Speed Signal Transmission Boards

• Medical Electronics and Devices

• High-End Communication Equipment

• Servers, Data Centers, and Networking Hardware

• Aerospace and Defense Systems

Why Choose PCBBUY for Immersion Gold PCB Finish?

When choosing PCB manufacturing partner, it is important to choose a supplier who has 

established expertise. PCBBUY offers:

•State-of-the-Art Equipment-Atomistic plating lines and testing equipment.

•Tight Quality Management - ISO, UL and RoHS certified.

•Engineering Experience - Experienced engineers to work on complicated PCB designs.

•Global Logistics Support – Fast delivery to customers worldwide.

•Customized Solutions – Tailored recommendations for cost-effective, high-performance 

finishes.

Conclusion

The immersion gold pcb finish is very crucial in the current electronics production that offers 

maximum flatness, oxidation stability, and solderability. In PCBBUY, we integrate high 

production technology and quality control to produce the immersion gold PCBs that surpass 

the expectation of the customers.

In need of a reliable PCB manufacturer, PCBBUY can help you reach your objectives and 

increase your products with the help of our immersion gold PCB finish technology.