Benefits of using nickel backplane for gold-plated connectors

In our factory, tens of thousands of connector products are produced every day, including many gold-plated connectors. When it comes to gold-plated connectors, we have to talk about the benefits of the nickel backplane used by gold-plated connectors. I don’t know how much you know about the benefits of using nickel backplanes for these gold-plated connectors, but Konnra connectors engineer just wants to say that the excellent function that these nickel floors bring to the gold-plated connectors is really too powerful. Let's take a look at how powerful the gold-plated connectors after using the nickel base plate.
Gold-plated terminals
The reason why gold-plated connector products use nickel baseplates in a large amount. The key to this is the performance of nickel. It makes the connector products more reliable, and also allows gold-plated connectors to have the following four functions:
1. Leveling layer
The nickel base plate can be used as a leveling agent, which can produce a surface roughness with lower roughness, thereby reducing friction, and thus improving the wear resistance of gold-plated connectors or contacts.
2. Bearing layer
The nickel coating is a hard coating and provides a basis for subsequent gold plating. This prevents hard gold deposits from cracking and improves the overall wear resistance of gold-plated connectors or contacts used in dynamic cycling.
3. Diffusion barrier
Alloy elements such as copper and zinc and lead can diffuse into the gold plating through solid-state diffusion, thereby forming a weak intermetallic or eutectic at the gold/substrate interface. This consumes some effective gold and reduces the integrity and function of the deposit, and the nickel base plate also forms an effective barrier to prevent diffusion and migration at the gold/substrate interface.
4. Corrosion inhibitor

The nickel base plate can work in conjunction with the final gold plating layer to isolate the substrate from the environment, thereby acting as an effective corrosion inhibitor, which can help reduce the total gold thickness required to prevent gold from corroding the substrate through the deposits. And nickel liner (such as high phosphorus electroless nickel plating) has excellent corrosion resistance, and high purity nickel (such as nickel sulfamate) provides the best welding foundation. Therefore, in the overall design of gold-plated connectors and contacts, the type and thickness of nickel should be carefully considered.




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