We find that the melt level of aluminum in the crucible directly affects the success of the crucible liner. The most common cause of crucible liner failure is overfilling the crucible with material which causes material spillage, creating an electrical short between the liner and the hearth. However, placing too little material in the crucible or evaporating too much material before refilling can be detrimental to the process as well. When the melt level is below 30%, the e-beam is likely to strike the bottom or walls of the crucible which immediately results in breakage. Our recommendation is to fill the crucible between ⅔ and ¾ full to prevent these difficulties.
Category: Evaporation Sources
Sub-Category: Crucible Liners for E-Beam Sources