文献类型：期刊文献

英文题名：A New Model for Permeability of Porous Medium in the Case of Flip-Chip Packaging

作者：Yao, Xing Jun[1];Wang, Zhengdong[2];Zhang, Wenjun[2,3];Zhou, Xingyan[1]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Dept Mat & Equipment Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Complex & Intelligent Syst Res Lab, Shanghai 200237, Peoples R China;[3]Univ Saskatchewan, Dept Mech Engn, Saskatoon, SK S7N 5A1, Canada

年份：2014

卷号：4

期号：8

起止页码：1265

外文期刊名：IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY

收录：;EI(收录号：20143418081607);WOS:【SCI-EXPANDED(收录号:WOS:000340622400001)】；

语种：英文

外文关键词：Flip-chip; permeability; power law model; solder bumps configuration; underfill

摘要：Underfill flow control is an important step in flip-chip technology and it can be generalized to fluid flow control in a porous medium, so solving this problem is of generalized implication to many other applications. The size of pores (i.e., clearance between the two solder bumps) in the flip-chip medium is less than 100 micrometers. In this paper, a new analytical model for permeability of the porous medium or solder bump flip-chip package is presented for two configurations of pores or solder of bumps (i.e., quadrilateral and equilateral triangular configurations). The model is shown to be more accurate than the existing model in the literature for the same purpose. Besides, the proposed model explicitly relates permeability with the structural parameters that describe the underfill space in flip-chip technology, namely, diameter of solder bumps, pitch of solder bumps, and gap height. In fact, there are two models, one for Newtonian fluids and the other for non-Newtonian fluids. These models allow us to optimize the structure of flip-chip packages in flip-chip technology or pores mediums in other applications. The models also provide a foundation for more precise control of the underfill flow process in flip-chip packages and the fluid filling process in pores mediums.