[labnetwork] Regarding : Aluminium E-Beam Evaporation

[Howard Northfield]

No crucible ... that is interesting.


________________________________
From: labnetwork <labnetwork-bounces at mtl.mit.edu> on behalf of Steffen, Paul <steffen.8 at osu.edu>
Sent: Monday, August 29, 2022 9:00 AM
To: 'Chandan H B' <chandanachar95 at gmail.com>; labnetwork at mtl.mit.edu <labnetwork at mtl.mit.edu>
Subject: Re: [labnetwork] Regarding : Aluminium E-Beam Evaporation

Attention : courriel externe | external email

Chandan,



Don’t bother with the crucible liner. Just melt a big chunk of aluminum directly in the pocket. It will not adhere to the walls so you will be able to remove it if you need to swap materials.



-Paul



From: labnetwork <labnetwork-bounces at mtl.mit.edu> On Behalf Of Chandan H B
Sent: Monday, August 29, 2022 2:04 AM
To: labnetwork at mtl.mit.edu
Subject: [labnetwork] Regarding : Aluminium E-Beam Evaporation



Dear Lab network community, We are currently facing an issue in the deposition of Aluminium in one of our Electron beam evaporation tools, we tried intermetallic, fab mate, copper, glassy coated graphite, and graphite crucibles for the evaporation. 

Dear Lab network community,



We are currently facing an issue in the deposition of Aluminium in one of our Electron beam evaporation tools, we tried intermetallic, fab mate, copper, glassy coated graphite, and graphite crucibles for the evaporation. It seems that none of them are working out.

We see crucible gets broken at the initial deposition quite often.



Are we missing out on any parameters unchecked?

Kindly recommend us a few parameters or solutions for the same.



Any suggestions/Inputs are highly appreciated.

Thanks in advance!



Regards,

CHANDAN H B

THIN FILM ENGINEER



P.S: Here are a few parameters that are provided to the tool.

Power: 10KW

Voltage: 10KV constant

Current: Variable

Rise1 & Soak1: 5min & 1min /8min & 2min

Rise1 Power: 4% (for intermetallic crucible)

Rise2 & Soak2: 5min & 1min /8min & 2min

Rise2 Power: 8% (for intermetallic crucible)

Ramp down: 5min

Rate of deposition: 0.1nm/sec

Beam Pattern: Spot Beam at the center of the crucible

Crucible Volume: 20cc

Material fill %: As recommended 67-75%




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