<div dir="ltr">Hello,<div><br></div><div>We've had very good luck running platinum in copper crucibles. Because we only deposit thin films, we've been using thick-walled crucibles to decrease the amount of platinum needed.</div><div><br></div><div>Twice over 10 years we've had damaged crucibles (similar to other materials, much better than some). Both times it was user error. One time the user placed the crucible on top of a thermally insulating carbon disk (the SOP reminds users to check for this) and the other time an incorrect recipe was used. In both cases, the user paid the difference between the cost to replace the crucible and what we got back from reclaim.</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Wed, May 27, 2026 at 6:13 AM Prashant Srinivasan <<a href="mailto:prashant@ucsb.edu">prashant@ucsb.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><u></u>
<div>
<p>Hi,</p>
<p>Perhaps this was mentioned earlier, but why not use a Cu liner?
I've seen Pt evaporated directly from the hearth.</p>
<div>On 5/26/2026 10:56 AM, Richelson,
Tucson wrote:<br>
</div>
<blockquote type="cite">
<div style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Hello,</div>
<div style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Does anyone have experience using refractory metal crucible
liners for e-beam evaporation of platinum?</div>
<div style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
I am currently using Fabmate, which performs well until the
platinum reaches higher temperatures, at which point carbon
contamination becomes an issue. I have had good results using a
tungsten liner for gold, and I’m considering trying tungsten for
platinum as well.</div>
<div style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
However, I’ve come across online sources suggesting that
refractory metals may not be compatible with platinum. I’d
appreciate any insights or recommendations based on your
experience. Thank you in advance.</div>
<div style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div id="m_5203417555661267250Signature">
<p style="background-color:rgb(255,255,255);margin:0in;font-family:Calibri,sans-serif;font-size:11pt;color:rgb(36,36,36)">
<span style="font-family:Arial,sans-serif;font-size:10pt;color:rgb(31,73,125)"><i>Best,</i></span></p>
<p style="background-color:rgb(255,255,255);margin:0in;font-family:Calibri,sans-serif;font-size:11pt;color:rgb(36,36,36)">
<span style="font-family:Arial,sans-serif;font-size:10pt;color:rgb(31,73,125)"><i>Tucson
Richelson</i></span></p>
<p style="background-color:rgb(255,255,255);margin:0in;font-family:Calibri,sans-serif;font-size:11pt;color:rgb(36,36,36)">
<span style="font-family:Arial,sans-serif;font-size:10pt;color:rgb(31,73,125)">-------------------------------------------------------------------------</span></p>
<p style="background-color:rgb(255,255,255);margin:0in;font-family:Calibri,sans-serif;font-size:11pt;color:rgb(36,36,36)">
<span style="font-family:Verdana,sans-serif;font-size:9pt"><b>Nick
Holonyak, Jr. Micro and Nanotechnology Lab (HMNTL)</b></span></p>
<p style="background-color:rgb(255,255,255);margin:0in;font-family:Calibri,sans-serif;font-size:11pt;color:rgb(36,36,36)">
<span style="font-family:Verdana,sans-serif;font-size:9pt"><b>University
of Illinois</b></span><span style="font-family:Verdana,sans-serif;font-size:12pt"><b><br>
</b></span>Rm 2104</p>
<p style="background-color:rgb(255,255,255);margin:0in;font-family:Calibri,sans-serif;font-size:11pt;color:rgb(36,36,36)">
208 North Wright St. Urbana, IL 61801</p>
<p style="background-color:rgb(255,255,255);margin:0in;font-family:Calibri,sans-serif;font-size:11pt;color:rgb(36,36,36)">
Ph: 217-244-5138</p>
<p style="background-color:rgb(255,255,255);margin:0in;font-family:Calibri,sans-serif;font-size:11pt;color:rgb(36,36,36)">
Web: <span style="color:rgb(5,99,193)"><a href="https://urldefense.com/v3/__http://mntl.illinois.edu/__;!!K-Hz7m0Vt54!gBj3BcpFSv_XY4JMk3U2DZpuToT_6tRMTUWFOGPPVAPz63o2paCu8XNFxTSNciaMdu_JxYpXqAwFJUSp$" style="color:rgb(5,99,193);margin-top:0px;margin-bottom:0px" target="_blank">http://mntl.illinois.edu/</a></span></p>
</div>
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</blockquote>
<pre cols="72">--
Prashant Srinivasan,
Teaching Cleanroom Engineer
Electrical & Computer Engineering
University of California, Santa Barbara
Santa Barbara, California 93106
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</blockquote></div><div><br clear="all"></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Darick Baker, PhD</div><div>Acting Director</div><div>Washington Nanofabrication Facility (WNF)</div><div>University of Washington</div><div>Fluke Hall 115, Box 352143</div><div>Desk: 206.221.8265 Cell: 206.395.4049 (text preferred)</div><div><a href="https://www.wnf.washington.edu/" target="_blank">https://www.wnf.washington.edu/</a><br></div><div>Pronouns: he/him<br></div><div><br></div><div>The University of Washington acknowledges the Coast Salish peoples of this land, the land which touches the shared waters of all tribes and bands within the Suquamish, Tulalip and Muckleshoot nations.</div></div></div></div></div></div></div>