高速光模块PCB板边插头腐蚀失效研究

A Study for corrosion failure of PCB gold fingers onhigh-speed optical module

作为5G光通信模块封装的电路载体,光模块PCB板边插头的耐腐蚀性能尤为重要。本文分析了引起光模块PCB板边插头腐蚀的失效机理,介绍了尖端磨损腐蚀、表面腐蚀、末端腐蚀和侧壁腐蚀4种常见腐蚀失效的产生原因,并探讨了避免腐蚀失效的改善措施。

As the circuit carrier in package of the 5G optical communication module,the corrosion resistance of PCB gold fingers on optical module is particularly important.In this paper,corrosion failure mechanism of PCB gold fingers on PCB optical module is analyzed,and failure reasons of four common types of corrosion including tip wear corrosion,surface corrosion,end corrosion and side wall corrosion are introduced.At last the improvement measures for preventing corrosion are discussed as a reference in the industry.