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<div>I stand corrected! I went ahead and EDAX'ed our cricible. We are using <span style="color: rgb(0, 0, 0);">
Molybdenum. </span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Yakimov, Michael <myakimov@albany.edu><br>
<b>Sent:</b> Saturday, February 1, 2025 9:11 AM<br>
<b>To:</b> Martin, Michael <michael.martin@louisville.edu>; Youry Borisenkov <yb2471@columbia.edu>; Fab Network <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> Re: [labnetwork] Gold e-beam deposition - carbon contamination</font>
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<div dir="auto">Per Kurt Lesler site, "<span style="font-size:12pt">FABMATEŽ material = 99.9995% elemental carbon."</span></div>
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<div dir="auto"><span style="font-size:12pt">And just thinking about it, if "filthy machine " can do it better than load locked .. did you try to run right after venting a good one? Just thinking that water and/or O2 may have a role in burning off carbon. </span></div>
<div dir="auto">Hearing "carbon contamination " also makes me think about surface contamination. For one outgassing profile is important for carbon removal, fast heating can convert natural CO-CH on the surface into elementary carbon, which is impossible to
remove. Maybe quick plasma on samples right before the run?</div>
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<div dir="auto">Mike</div>
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<div id="x_ms-outlook-mobile-signature" dir="auto">Get <a href="https://aka.ms/AAb9ysg" originalsrc="https://aka.ms/AAb9ysg" shash="NVS2M/Cr+flAMXWzXjSw30kwpoRkIubai8fLKrzTzRb86O8sOYKtznAeSh2okbc6MD2HgSSgHH+bpV/qN27MtMenh3m7eBhn4GUuHnArSAEc6ieq7p8Ay10HmncbRjalWn17XGibX2ICBZMBVxYJgR5Iq6gjR382vh/S+KPgXq4=">
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> on behalf of Martin, Michael <michael.martin@louisville.edu><br>
<b>Sent:</b> Friday, January 31, 2025 8:44:47 PM<br>
<b>To:</b> Youry Borisenkov <yb2471@columbia.edu>; Fab Network <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> Re: [labnetwork] Gold e-beam deposition - carbon contamination</font>
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Hi Youry,</div>
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I believe the fabmate is a metal alloy that has no carbon in it. If you're seeing carbon it's probably from somewhere else in your tool. We regularly do gold deposition with fabmate and don't have any problem.</div>
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-Michael</div>
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<div id="x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> on behalf of Youry Borisenkov <yb2471@columbia.edu><br>
<b>Sent:</b> Friday, January 31, 2025 11:59 AM<br>
<b>To:</b> Fab Network <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> [labnetwork] Gold e-beam deposition - carbon contamination</font>
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<div>Hi All and happy Friday,</div>
<div>I know it is a topic that has been discussed multiple times, however, I'm still lacking a solution that works and will appreciate you sharing your experience.</div>
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<div>Currently we are using a Fabmate crucible, and getting some carbon contamination . </div>
<div>For clean Gold layers we use thermal evaporation. The films are good but it requires a lot of gold.</div>
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<div>So far we tried using a Molybdenum crucible with and without a spacer. The issue with this approach was that eventually after some time, we get carbon contamination back. I believe it's present in the chamber and eventually a critical mass is built on
top of the gold in the crucible, coming from the chamber.</div>
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<div>Were anyone successful in overcoming carbon contamination in their e-beam deposition overtime? </div>
<div>What are the procedures you are following? Maybe cleaning more frequently?</div>
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<div style="color:rgb(136,136,136)">Thank you,</div>
<div style="color:rgb(136,136,136)">Youry Borisenkov</div>
<div style="color:rgb(136,136,136)"><a href="https://cni.columbia.edu/columbia-university-clean-room" originalsrc="https://cni.columbia.edu/columbia-university-clean-room" shash="qkIizx5ItY1q18DMsl1b9fNZt64iQG5zX7auBoN5LqR9UB1wBKxrrMKlmnUdrONam3CG3Hy7yaq7RL0cmTkrnHzvscHiLMy98k5VMDthZ9Htu2qtlZL3q1iSTQsBFHcPLuZM63Wo2xRg5VngEij8QTwe7BJIBnTsEyIOQ1X7Jng=" originalsrc="https://cni.columbia.edu/columbia-university-clean-room" shash="K0vZO8Ddqn4vJWY4LHoJSYsjeUpGUTvr/6OEyGvlLUQYGov+/kiQyl13i3KI7+JYR8/pkE06VCTTK/5njwX8KIcj2fYNAyE2u//wiCS4VSxv7GNTMy6SEr7T8B11pMMaagyLydo6DZBG9d/SxkF/SaZ/Z8BWOdmFnDOX4pfbJz8=" target="_blank">CNI</a></div>
<div style="color:rgb(136,136,136)">Columbia University</div>
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