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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Cliff,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Aluminum needs to be evaporated slowly. Sometimes users will ramp the power faster and due to this the Al tend to come out of the liner and get into gap between
the liner and the copper pocket, and this will lead to the cracking of the crucible. With slow ramping also we have seen the liner keeps cracking. So I always use Al without any liner, we have one pocket dedicated only for Al.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">If you still want to use liner then try fabmate crucible from lesker<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><a href="http://www.lesker.com/newweb/evaporation_sources/ebeam_crucibles_fabmate.cfm?pgid=0">http://www.lesker.com/newweb/evaporation_sources/ebeam_crucibles_fabmate.cfm?pgid=0</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Other suggestion is using Tungsten Crucible, but I haven’t tested this with Al.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">-Shiva<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:black">Shivakumar Bhaskaran, Ph.D.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:black">Searle CleanRoom Manager<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:black">The University of Chicago<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:black">5735 S.Ellis, Room 032<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:black">Chicago-60637<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:black">Ph:773-795-2297<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:black">https://searle-cleanroom.uchicago.edu/<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> labnetwork-bounces@mtl.mit.edu [mailto:labnetwork-bounces@mtl.mit.edu]
<b>On Behalf Of </b>Clifford F Knollenberg<br>
<b>Sent:</b> Tuesday, May 31, 2016 12:12 PM<br>
<b>To:</b> labnetwork@mtl.mit.edu<br>
<b>Subject:</b> [labnetwork] Aluminimum source crucible suggestions<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">Hi All,<o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">We've been having crucible cracking issues with out Al e-beam evaporation source. In short it cracks its crucible after just a few uses. This wasn't so bad when it happened
ever 4-5 months, but not its happening about every week or two. I've tried a variety of crucibles, had the most luck with carbon crucible. Is there anything else out there we should be trying?<o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">Cheers,<o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">Cliff<o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">Clifford Knollenberg<o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">Science & Engineering Associate<o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">Stanford Nano Shared Facilities (SNSF)<o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">Email:
<a href="mailto:cknollen@stanford.edu">cknollen@stanford.edu</a> <o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">Tel: 650-723-1675<o:p></o:p></span></p>
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