Investigation of Bulk Resistance for Metal-Coated Polymer Particles Used in Anisotropic Conductive Adhesive
This work presents a novel method to evaluate the bulk resistance of the Au/Ni coated polymer particles of anisotropic conductive adhesive (ACA) joints, considering the bending of electric streamlines and the nonuniformity of current density in the metal layers of particles. The bulk resistance calculated by this new method and conventional methods are compared and the results show that the values gotten by the conventional methods which assume that the current across the particles distributes uniformly are seriously underestimated. Based on the new method, the effects of bonding force and ACAs geometric parameters on the bulk resistance are investigated respectively. It is found that the bonding force and Au layer thickness are the most important factors to influence the bulk resistance. Ni layer thickness is also very important to the bulk resistance but less sensitive than the Au layer thickness. It is also found that the polymer core diameter has little effect on the bulk resistance when it is more than 3μm. Finally, the suitable ranges of all these parameters are recommended to ensure the low stable bulk resistance.
Xiancai Chen Bo Tao Zhouping Yin
State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology, Wuhan, 430074.People’s Republic of China
国际会议
上海
英文
485-491
2011-08-08（万方平台首次上网日期，不代表论文的发表时间）