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<p class="MsoNormal"><span style="font-size:12.0pt">Haghighi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">This is my collection of failed crucibles used to evaporate Ni.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">We decided on graphite, because copper was worse. We limit our deposition rate to 0.2</span><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black;background:#F8F9FA">
</span><span style="font-size:12.0pt">Å/sec to help extend the lifespan of the crucibles. They still fail after 2-3 depositions.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Jeff<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><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">Jeff Salzmann</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Assistant Professor of Research</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Cleanroom Manager, Shared Instrumentation Laboratories</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">School of Engineering and Applied Sciences</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">University at Buffalo</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">114A Davis Hall</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Buffalo, NY 14260</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Tel: 716.645.2584</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">labnetwork <labnetwork-bounces@mtl.mit.edu> on behalf of Bernhard Reineke <bernhard.reineke@uni-paderborn.de><br>
<b>Date: </b>Wednesday, December 4, 2024 at 11:46<br>
<b>To: </b>shokoofe haghighi <shokoofe_haghighi@yahoo.com>, labnetwork@mtl.mit.edu <labnetwork@mtl.mit.edu><br>
<b>Subject: </b>Re: [labnetwork] question about Liner for Ni Ebeam Evaporation<o:p></o:p></span></p>
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<span style="font-size:12.0pt;font-family:"wf_segoe-ui_normal",serif;color:black">You don't often get email from bernhard.reineke@uni-paderborn.de.
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<p class="MsoNormal"><span style="font-size:12.0pt">Hi Haghighi,<br>
<br>
we tried this once, same result. All liners will crack. Lesker has some recommendations on Ebeam evaporation of Ni: slow power ramp up and down (works well to prevent cracking for ~2-4 Runs, with fabmate). A Cu liner should work better but we never tested that.<br>
<br>
https://www.lesker.com/newweb/deposition_materials/depositionmaterials_evaporationmaterials_1.cfm?pgid=ni1<br>
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Best,<br>
<br>
Bernhard <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;color:black">Von:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"> labnetwork <labnetwork-bounces@mtl.mit.edu> im Auftrag von shokoofe
haghighi <shokoofe_haghighi@yahoo.com><br>
<b>Gesendet:</b> Mittwoch, 4. Dezember 2024 10:35:19<br>
<b>An:</b> labnetwork@mtl.mit.edu<br>
<b>Betreff:</b> [labnetwork] question about Liner for Ni Ebeam Evaporation</span><span style="font-size:12.0pt">
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue"">Hi, hope you are having good days, <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue"">this is Haghighi, working on metallization by a PVD, using thermal and Ebeam evaporation. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue"">I have some issues choosing the right liner for Ni Ebeam evaporating, hope you find time to guide me through it. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue"">We have tested graphite, glassy carbon coated graphite, Al2O3, Mo, W and Cu liners so far. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue""> Graphite liner just broke after first run from the border line of Ni surface. <span style="color:black">Glassy carbon coated graphite was more or less the same,</span><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue""> Al2O3 endured for 4-5 runs before breaking but there were cracks on it, <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue""> Mo liner totally melted and some kind of alloy was produced,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue""> W and Cu endured but their internal walls were some how melted and we can't be sure about pureness of evaporated Ni and final produced thin films.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue"">do you have any other suggestions? <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue"">high voltage: 6.1 KV<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue"">emission current: 3 - 5 A<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue""> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue"">Thanks for your time and attention in advance, I hope you kindly find time and consider replying me, <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue"">Dr. Haghighi<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica Neue""><o:p> </o:p></span></p>
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