[labnetwork] Bismuth evaporation

[Youry Borisenkov]

Dear All,
We have a user that needs to deposit *Bismuth *for contact electrodes for
2D materials.

We also have an Edwards 306 thermal evaporator for these types of
exotic/"contaminating" materials deposition requests. However, the results
he is getting on this tool are not satisfactory (sometimes he will get 50%
working devices and sometimes 0). So they ask to use Bi in a general use
e-Beam evaporator.

I have 2 questions:
1. Do any of you have experience in evaporating Bismuth in general
use e-Beam evaporator? And what are the main concerns?
2. Alternatively, do any of you have any input on how to improve the
deposition repeatability or what's the important parameter to look at
during Bismuth deposition in thermal evaporation?

Thank you and Best regards,
Youry Borisenkov, Ph.D.
Process engineer CNI Shared Labs
Columbia University
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