Z-Axis Anisotropic Electrical Conductor Films in Adhesive and Standalone Forms for Electrical Interconnection

摘要

Z-axis electrical conductor films in adhesive and standalone forms were made from nickel particles (one per conduction path) and a polymer matrix (polyvinylidene fluoride for the standalone film and epoxy for the adhesive film). The standalone film was found to exhibit resilience, conducting path pitch l25 mu m and z-axis resistance 2 Ω.4 Ω,17,48 and 160 Ω per connection at z-axis pressures of 1.39 MPa, 0.037 MPa, 0.0046 MPa, and 0 MPa respectively; each connection consisted of one nickel particle, which protrUded from both. sides of the film; the film exhibited no stress relaxation due to the absence of polymer deformation under z-axis pressure. The adhesive film exhibited pitch 64 pm and z-axis resistance 52 Ω per connection at zero pressure.