PCB News - The difference between electroplated nickel gold and immersion gold in PCB proofing

The difference between electroplated nickel gold and immersion gold in PCB proofing

Immersion gold and gold plating are commonly used processes in PCB proofing, and many people cannot distinguish the difference between the two correctly. PCB factory editor teaches you to identify the differences between these two processes?
What we usually call electroplating nickel gold generally refers to "electroplating gold", "electrolytic gold", "electric gold", "electric nickel gold plate". It makes the gold particles adhere to the PCB board through the method of electroplating, Because of its strong adhesion, it is called hard gold; the use of this process can greatly increase the hardness and wear resistance of the PCB, can effectively prevent the diffusion of copper and other metals, and can meet the requirements of hot pressing and brazing. The coating can It is uniform and meticulous, with low porosity, low stress and good ductility. Therefore, it is widely used in PCB proofing of electronic products.
So what is heavy gold? Immersion gold is a chemical reaction that crystallizes gold particles and adheres to the pads of the PCB board. Because of the weak adhesion, it is also called soft gold.

The main difference between circuit board immersion gold board and gold-plated board:
1. Generally, the thickness of gold is much thicker for gold than for gold, so the gold will appear golden yellow, which is more yellow than gold. The crystal structure formed by the two is different.
2. Since the crystal structure formed by immersion gold and electroplated nickel gold is different, immersion gold is easier to weld than gold plating. At the same time, it is also because immersion gold is softer than gold plating, so gold finger plates generally choose electroplating nickel gold, because it is hard Gold wear-resistant.
3. In the PCB proofing process, both electroplating of nickel and gold are surface treatment processes. The difference is that electroplating of nickel and gold is done before the solder mask; while the immersion gold is done after the solder mask.
The above is the main difference between gold immersion board and gold-plated board. Nowadays, gold is expensive on the market. In order to save costs, many PCB manufacturers are no longer willing to produce electroplated nickel-gold boards, and only make immersion gold boards with nickel-gold on the pads. Order. ipcb is a high-precision, high-quality PCB manufacturer, such as: isola 370hr PCB, high-frequency PCB, high-speed PCB, ic substrate, ic test board, impedance PCB, HDI PCB, Rigid-Flex PCB, buried blind PCB, advanced PCB, microwave PCB, telfon PCB and other ipcb are good at PCB manufacturing.