高功耗2.5D封装的热性能优化设计分析

Based on ANSYS and Icepak softwares, the numerical analysis method is used to build up the thermal analysis model of the 2.5D package, which contains a high power CPU chip. The focus of the research is on the determination of the contributing factors and their effects on the thermal resistance and heat distribution of the package. The parametric analysis illustrates that the substrate conductivity, TIM conductivity and fin height are more crucial for heat conduction in the package. Furthermore, these major parameters are compared and analyzed by orthogonal tests, and the optimal solution for 2.5D integration is proposed. The factors' influence patterns on thermal resistance, obtained in this article, could be utilized as a thermal design reference.     

酸性脉冲电镀铜中脉冲参数的作用研究

文章通过正交实验,研究了酸性硫酸铜体系中周期反向脉冲电镀的主要脉冲参数及其交互作用对孔壁镀层均匀性的影响。脉冲电流比主要影响着小孔径阴极沉积与阳极溶解的平衡,也影响着阴极沉积与阳极溶解的平衡,同时也影响着添加剂的吸附行为。     

印制板焊接试验方法与测试评价

焊接试验方法是考察印制板质量和可靠性的重要方法之一,本文通过对3种具体试验方法的标准介绍和比较,结合实际试验案例进行原因分析,为PCB检验人员正确掌握以上试验方法提供技术指导。