BGA焊点形态和布局对信号完整性的影响

摘要

In order to study the effect of BGA solder joint shape and layout on signal integrity.BGA solder joints 3D model is established,the influence of the shape(height,diameter and port diameter) and distribution of BGA solder joints on signal integrity base on HFSS is researched.The result shows that RL increases with the rise in the frequency,the solder joint height,the maximum diameter and the port diameter.There are fewer effects on the adjacent solder joint crosstalk by the shape of solder joint.The solder joint crosstalk noise is influenced largely by the adjacent solder joints and the effect of the diagonal solder joints is minor.%为了研究BGA焊点形态和布局对反射和串扰的影响,基于三维全波电磁仿真软件HFSS,建立了BGA焊点的三维模型,研究BGA焊点的形态(高度、最大外径和焊点端口直径)以及布局对反射和串扰的影响.结果表明,随信号频率、焊点高度、焊点最大外径和焊点端口直径的增大,回波损耗增大；焊点的形态对相邻焊点串扰影响不明显；焊点串扰噪声受相邻焊点影响最大,对角线焊点次之.