Microstructural and mechanical integrity of Cu/Cu interconnects formed by self-propagating exothermic reaction methods
Copper is bonded using solder and self-propagating exothermic reaction (SPER). The interfacial IMC layers at different interfaces are verified. The shear strength of Cu/Cu SPER joining can reach 30MPa. The influence of process parameters on porosity and joint thickness are analysed. The fracture mode of SPER joints and the leading cause are verified.
self-propagating exothermic reaction imc processing parameters porosity joint thickness fracture modes