Al/Ni Self-Propagating Exothermic Film for MEMS Application
This paper describes evaluation of the strength in Ag-Sn-jointed Si specimens heated by Al/Ni film’s exothermic reaction. The reaction generates heat enough to melt Ag-Sn film for soldering. To measure the strength, four-point micro-bending test technique has been developed. The rectangular-solid Si specimens having a Ag-Sn/AlNi/Ag-Sn section were prepared by dicing the bonded Si-wafer under various pressure loads. A higher pressure yielded a better contact condition between Al/Ni and Ag-Sn so that heat-conduction improved; consequently Ag-Sn was melted sufficiently. Al/Ni reactive film has a potential as a micro-heater in soldering for MEMS.
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
T. Namazu and S. Inoue, "Al/Ni Self-Propagating Exothermic Film for MEMS Application", Materials Science Forum, Vols. 638-642, pp. 2142-2147, 2010