[labnetwork] Forming gas: 5% or 10% hydrogen

[John Boyle]

Most industrial gas suppliers are reluctant to go above 5% H2 in N2 as this is the threshold where the mix can become flammable. If the process can tolerate <=5% H2 in N2 then that is a preferred supply option. Now, the same gas suppliers have no problem supplying 100% H2 but then 100% H2 is shipped, stored and used under a set of codes and standards that are specific to the flammability issues with 100% H2.

 

John

 

 

John Boyle

John Boyle Consulting, LLC

4848 Canterbury Drive

Emmaus, PA 18049

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From: labnetwork [mailto:labnetwork-bounces at mtl.mit.edu] On Behalf Of Dennis Schweiger
Sent: Friday, March 01, 2024 5:36 AM
To: Beaudoin, Mario
Cc: labnetwork at mtl.mit.edu
Subject: Re: [labnetwork] Forming gas: 5% or 10% hydrogen

 

Mario,

 

good morning.  Here at the University of Michigan/LNF we use a 5%H2/Nitrogen mix wherever we need forming gas.  We had one application that was using 2%, however that tool has gone off-line and that gas mix was removed.  Our EHS group has capped us at 5% for not needing any type of H2 detection in case there is a leak.  So far, i've heard of no complaints that we need either more, or less, H2 in the mix, or that we need to switch to another carrier gas.

 

Thanks,

 

Dennis

 

734.647.2055 Ofc

 

"People can be divided into 3 groups - those that make things happen, those that watch things happen, and those that wonder what happened."  Within which group do you belong?

 

 

On Tue, Feb 27, 2024 at 3:55 PM Beaudoin, Mario <beaudoin at physics.ubc.ca> wrote:

Dear Network,

We're setting up a new RTA and will run it with Ar, N2 and forming gas.  We're uncertain about the % level of hydrogen we want in our forming gas.  Can someone recomment the best hydrogen % to use for MOS capacitor annealing?

Regards,

Mario

-- 


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