[labnetwork] Evaporating Iridium

[Gila,Brent P]

Hello Jason,

Due to its really high temperature to evaporate and slow deposition 
rate, we purchased a sputter target.  Works great!

You just have to take out a loan to afford the target.

Best Regards,
Brent

On 8/4/2026 1:18 PM, Oncel, Nuri wrote:
> *[External Email]*
>
> Hi Jason,
> I have deposited Ir on a variety of surfaces, and the process is 
> actually quite straightforward. I simply connected an Ir wire to a 
> high current feedthrough (connected to a UHV STM chamber) and passed 
> the current through it to evaporate the metal. I calibrated the 
> deposition rate using Auger.
> A common approach is to use a W wire and wrap the source material 
> around it. However, that method can also result in some W being 
> co-deposited along with Iridium.
> For your reference, I've attached three of my papers that mention Ir 
> deposition.
> Please feel free to reach out if you have any questions or if there's 
> anything else I can help with.
> Best,
> Nuri
>
>
> Professor Nuri Oncel, Ph.D.
>
> _Director of UND-NanoFoundry_ 
> <https://www.und.edu/Nanofoundry>
>
> Department of Physics and Astrophysics
>
> University of North Dakota
>
> _https://sites.google.com/view/oncel-research-group/group_ 
> <https://sites.google.com/view/oncel-research-group/group>
>
> ------------------------------------------------------------------------
> *From:* labnetwork <labnetwork-bounces at mtl.mit.edu> on behalf of 
> EDWARDS, JASON R CTR USAF AFMC AFRL/RYDD <jason.edwards.30.ctr at us.af.mil>
> *Sent:* Tuesday, August 4, 2026 8:09 AM
> *To:* labnetwork at mtl.mit.edu <labnetwork at mtl.mit.edu>
> *Subject:* [labnetwork] Evaporating Iridium
>
> Good morning network,
>
> I am interested to see if any of you have experience using Iridium in 
> your evaporation systems. We are getting conflicting information from 
> various manufacturers on how we should go about melting our Iridium. 
> Our OEM recommends melting straight in the pocket while Lesker 
> recommends using their Fabmate crucible liner. If you evaporate 
> Iridium, do you use a liner in your system? In what form do you 
> receive your Iridium? Pellets, shot, rods? For what it is worth the 
> Iridium that was purchased for us is flat fractured pieces ranging in 
> size from dust to 8mm, which seems less than ideal.
>
> Thanks,
>
> 	
>
> *Jason Edwards*
>
> Clean Room Facilities Manager | National Security Solutions
>
> KBR | Mission Technology Solutions
>
> 2241 Avionics Circle, Area B, Bldg.600|WPAFB, OH, 45433 | USA
>
> Office: +1 937.713.8741  | Mobile: +1 937.524.7701
>
> Jason.edwards.30.ctr at us.af.mil 
> <http://Jason.edwards.30.ctr@us.af.mil/>
>
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>
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