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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Cliff,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">We had problems with cracking liners and also aluminum wicking up intermetallic BN-TiB2 liners and bridging to the edge of the hearth pocket causing drops in
the deposition rate due to heat conduction. We found out about an alternate approach used on an older CHA ebeam evaporator on campus with the same pocket size (15 cc): they dispensed with the liner and just made an aluminum melt directly in the pocket. The
edges that touch the pocket are oxidized so you can still remove the melt slug. If you maintain the melt slug to the top of the pocket, then you don’t have to worry about deposition on the sides of the pocket either. Please contact me if you would like more
information.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">-Paul<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
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<span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#333333"><img width="224" height="45" id="Picture_x0020_1" src="cid:image001.png@01D1BB69.1282FEB0" alt="The Ohio State University"><br>
</span><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#BB0000;background:white">Paul Steffen</span></b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#333333"><br>
Lab Manager<br>
</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#BB0000;background:white">Institute for Materials Research</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#333333"> Nanotech West Lab<br>
100 Science Village, 1381 Kinnear Road, Columbus, OH 43212<br>
614-688-3546 Office / 614-688-3379 Fax<br>
<a href="mailto:steffen.8@osu.edu"><span style="color:blue;background:white">steffen.8@osu.edu</span></a>
<a href="http://nanotech.osu.edu"><span style="color:blue;background:white">nanotech.osu.edu</span></a>
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><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 1:12 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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