by Volker Brichzin, Senior Director Engineering, TE Connectivity
It’s all about plating
In today’s design landscape, engineers are tasked with balancing the need for exceptional signal integrity and mechanical durability with the imperative to reduce production costs and product carbon footprints. At the core of this challenge lies the connector interface, where the surface finish of the contacts plays a crucial role in determining electrical and mechanical performance.
Connectors must not only perform reliably during operation but also withstand high loads. The choice of plating materials applied to the contact base material is essential to meet both electrical and mechanical requirements. Selecting the right plating materials ensures low contact resistance, minimal losses, protection against corrosion, and reliability in mating cycles and micro movements.
Plating protects against corrosion
Corrosion can significantly impact the performance of connector surfaces by reducing microcontact points and degrading transmission quality. In applications with high vibration and mechanical stress, such as automotive and industrial machinery, fretting corrosion can occur, leading to wear and exposure of the base metal. Optimizing surface treatments, including the use of barrier layers, is crucial to prevent corrosion and ensure long-term performance.
While precious metals like gold have traditionally been used for plating, fluctuations in costs and environmental concerns have prompted the need for thinner plating layers. Nickel barrier layers are now commonly used to prevent diffusion and provide corrosion protection, with contact layers made of full gold or palladium-nickel with gold flash.
Even the gold standard has disadvantages
Gold-plated contacts have long been favored for their high performance and resistance to oxidation. However, the fluctuating costs and environmental impact of gold have led to efforts to reduce the thickness of gold layers. TE Connectivity has conducted extensive research to optimize plating technology, aiming to achieve superior performance while meeting environmental requirements.
The science behind amorphous alloys
Nickel phosphor alloys offer a promising alternative to traditional plating materials, providing exceptional hardness and abrasion resistance. Through advanced electroplating techniques, nickel phosphor alloys can be applied in a controlled process to achieve an amorphous, glass-like state, offering superior durability and performance.
The use of nickel phosphor alloys offers improved durability and performance, outperforming traditional plating materials in wear evaluations and extending operational lifetimes in demanding applications.
A sustainable and cost-effective roadmap
Transitioning to nickel phosphor alloys not only improves mechanical performance but also addresses environmental and economic concerns. By reducing the use of precious metals like gold and palladium, manufacturers can significantly reduce carbon emissions and production costs while maintaining high-quality standards.
By adopting advanced plating technologies like nickel phosphor alloys, manufacturers can achieve significant cost savings, environmental benefits, and improved performance, ensuring the development of sustainable and resilient systems for the future.
Filed Under: Communications, Featured
