A chip resistor assembly is composed of chip resistor, solder joint, printed circuit board (PCB), and Cu-pad:[1]
The assembly generally operates under harsh working conditions and is subject to thermomechanical loads.
This figure illustrates a typical working temperatures over a one-hour cycle:
The initial temperature is 125 ℃, then gradually decreases to the lowest temperature -40 ℃. Then, the temperature increases back to 125 ℃ and holds constant.
Repeating this temperature cycle 250 times, this study investigates the mechanical behavior of the structure, particularly the damage of the solder joint.