"For metal bonding, higher energy than bonding energy is needed to be supplied to the bonding place.
And supplied energy is diffuse at the bonding place.
But energy is not enough for bonding energy then metal bonding is failed.
To find the condition for bonding, it have to do the energy diffusion simulation.
If simulate the energy diffusion at the bonding place, then calculate the energy distribution.
The high energy part of the energy distribution is enough to bonding energy then bonding occurs at that part.
"