<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none;"><!-- P {margin-top:0;margin-bottom:0;} --></style>
</head>
<body dir="ltr">
<div id="divtagdefaultwrapper" style="font-size:12pt;color:#000000;background-color:#FFFFFF;font-family:Calibri,Arial,Helvetica,sans-serif;">
<p>Thank you all for your suggestions and comments. I think I have some good ideas to work from.</p>
<p><br>
</p>
<p>Cheers,</p>
<p><br>
</p>
<p>Cliff</p>
<p><br>
</p>
<p><br>
</p>
<div id="Signature">
<div id="divtagdefaultwrapper" style="font-size:12pt; color:#000000; background-color:#FFFFFF; font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Clifford Knollenberg</p>
<p>Science & Engineering Associate</p>
<p>Stanford Nano Shared Facilities (SNSF)</p>
<p>Email: cknollen@stanford.edu </p>
<p>Tel: 650-723-1675<br>
</p>
</div>
</div>
<br>
<br>
<div style="color: rgb(0, 0, 0);">
<hr tabindex="-1" style="display:inline-block; width:98%">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Steffen, Paul <steffen.8@osu.edu><br>
<b>Sent:</b> Tuesday, May 31, 2016 3:22 PM<br>
<b>To:</b> Clifford F Knollenberg; labnetwork@mtl.mit.edu<br>
<b>Subject:</b> RE: Aluminimum source crucible suggestions</font>
<div> </div>
</div>
<div>
<div>
<p style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;">
<span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:#1F497D">Cliff,</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;">
<span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:#1F497D"> </span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;">
<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.</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;">
<span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:#1F497D"> </span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;">
<span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:#1F497D">-Paul</span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;">
<span style="font-size:11.0pt; font-family:"Calibri",sans-serif"> </span></p>
<p style="line-height: 13.5pt; margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif; background: white;">
<span style="font-size:9.0pt; font-family:"Arial",sans-serif; color:#333333"><img width="224" height="45" id="Picture_x0020_1" alt="The Ohio State University" tabindex="0" style="-webkit-user-select: none;" src="cid:image001.png@01D1BB69.1282FEB0"><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" style="color: rgb(5, 99, 193); text-decoration: underline;"><span style="color:blue; background:white">steffen.8@osu.edu</span></a>
<a href="http://nanotech.osu.edu" style="color: rgb(5, 99, 193); text-decoration: underline;">
<span style="color:blue; background:white">nanotech.osu.edu</span></a> </span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;">
<span style="font-size:11.0pt; font-family:"Calibri",sans-serif"> </span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;">
<span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:#1F497D"> </span></p>
<p style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;">
<span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:#1F497D"> </span></p>
<div>
<div style="border:none; border-top:solid #E1E1E1 1.0pt; padding:3.0pt 0in 0in 0in">
<p style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;">
<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</span></p>
</div>
</div>
<p style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;">
</p>
<div id="divtagdefaultwrapper">
<p style="background:white"><span style="font-family:"Calibri",sans-serif; color:black">Hi All,</span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif; color:black"> </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?</span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif; color:black"> </span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif; color:black">Cheers,</span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif; color:black"> </span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif; color:black">Cliff</span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif; color:black"> </span></p>
<div id="Signature">
<div id="divtagdefaultwrapper">
<p style="background:white"><span style="font-family:"Calibri",sans-serif; color:black">Clifford Knollenberg</span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif; color:black">Science & Engineering Associate</span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif; color:black">Stanford Nano Shared Facilities (SNSF)</span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif; color:black">Email:
<a href="mailto:cknollen@stanford.edu" style="color: rgb(5, 99, 193); text-decoration: underline;" title="mailto:cknollen@stanford.edu
Ctrl+Click or tap to follow the link">
cknollen@stanford.edu</a> </span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif; color:black">Tel: 650-723-1675</span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>