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Hi Saba,
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<div class="">Do you have a portable RGA? Greases and oils leave tell-tale signature peaks to tell us what they are, and then it’s a matter choosing the appropriate removal method. As far as the bulk, visible quantities, are you sure you were able to both
find and remove it all?</div>
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Best Regards,</div>
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Mark<br class="Apple-interchange-newline">
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________________________________________________________________</div>
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Mark Weiler</div>
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Manager, Equipment & Facilites</div>
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Claire and John Bertucci Nanotechnology Laboratory</div>
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Eden Hall Nanofabrication Cleanroom</div>
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Carnegie Mellon University</div>
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P:<span class="Apple-tab-span" style="white-space: pre;"> </span>412-268-2471</div>
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F:<span class="Apple-tab-span" style="white-space: pre;"> </span>412-268-3497</div>
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<a href="http://www.nanofab.ece.cmu.edu" class="">http://www.nanofab.ece.cmu.edu</a></div>
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<span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span><span><span><span><span><a href="https://www.linkedin.com/in/marksbasics" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""></a></span></span></span></span></span></span><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"></span><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"></span><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"></span><span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;"></span><span><img apple-inline="yes" id="832A0561-9E01-41E8-B109-D41162E5FCD2" src="cid:2D2E01E3-CEC1-4F48-A845-224D8D7CED12@wv.cc.cmu.edu" class=""></span>
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<div class="">On Apr 12, 2021, at 10:37 AM, Saba Sadeghi <<a href="mailto:saba.sadeghi@uwaterloo.ca" class="">saba.sadeghi@uwaterloo.ca</a>> wrote:</div>
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<div class="">Dear colleagues,<br class="">
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I have found a an unknown contamination in the loadlock of our the UHV system. It has a white, greasy, soft texture. I'd like to know the elemental analysis of it since after wiping the system with IPA and baking it the vacuum didn't improve and I am afraid
it must have left residuals. <br class="">
Would you know any company that offers elemental analysis/ ICP to identify unknown substances?<br class="">
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Thank you,<br class="">
Saba <br class="">
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--<br class="">
Saba Sadeghi, PhD<br class="">
Quantum Devices Fabrication Scientist<br class="">
<a href="mailto:saba.sadeghi@uwaterloo.ca" class="">Email: saba.sadeghi@uwaterloo.ca</a><br class="">
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