Why tin (Sn) from evaporator is moving to the top of crucible when we are increasing the filament current?

We are using a resistive evaporator to deposit tin on substrates. Tin that we are using is of 99.999 % pure and it is inside a Al2O3 crucible( 3mm inner diameter and 30mm length).We are using...

04 September 2019 9,534 3 View