From rcrane at snf.stanford.edu  Thu May  1 15:53:52 2003
From: rcrane at snf.stanford.edu (Dick Crane)
Date: Thu, 01 May 2003 15:53:52 -0700
Subject: Freon115 nears empty
Message-ID: <3EB1A580.FFC81388@snf.stanford.edu>

All,

The freon115 cylinder is approaching empty and it is time to switch to
freon22. If the pressure gauge is to be believed, the gas will run out
in five weeks. I wish to switch to freon22 on May 23 and avoid any
unscheduled gas outages. Please plan accordingly. Etch testing on
freon22 has been completed and is awaiting Jim McVittie's blessing.

Thanks,

Dick



From rcrane at snf.stanford.edu  Mon May 12 17:07:11 2003
From: rcrane at snf.stanford.edu (Dick Crane)
Date: Mon, 12 May 2003 17:07:11 -0700
Subject: [Fwd: Freon115 nears empty]
Message-ID: <3EC0372F.FFFEF8FE@snf.stanford.edu>

Kind reminder. Cylinder pressure is 20psi. The end is near.

Dick Crane wrote:

> All,
>
> The freon115 cylinder is approaching empty and it is time to switch to
> freon22. If the pressure gauge is to be believed, the gas will run out
> in five weeks. I wish to switch to freon22 on May 23 and avoid any
> unscheduled gas outages. Please plan accordingly. Etch testing on
> freon22 has been completed and is awaiting Jim McVittie's blessing.
>
> Thanks,
>
> Dick



From booth at snf.stanford.edu  Mon May 19 10:09:15 2003
From: booth at snf.stanford.edu (Len Booth)
Date: Mon, 19 May 2003 10:09:15 -0700
Subject: Near end of F-115
Message-ID: <3EC90FBB.979ECCF1@snf.stanford.edu>

	Our last supply of Freon 115 is very nearly
empty.  We are hoping that it will last until this
Friday may 23rd, when we expect to remove the F-115
bottle and replace it with a large new bottle of
F-22.  I've put a plot of the F-115 bottle pressure
at Drytek2 for your inspection, updated as of this
morning, Monday May 19th.  There will be no more F-115.
	If the bottle becomes empty before this 
Friday, we will have to make the change sooner than
scheduled.  
	Jim McVittie has process data showing the
changes in etching characteristics when switching
to recipes which will use F-22.
			Len


From rcrane at snf.stanford.edu  Wed May 21 08:14:59 2003
From: rcrane at snf.stanford.edu (Dick Crane)
Date: Wed, 21 May 2003 08:14:59 -0700
Subject: Freon115 changes to Freon22 tomorrow
Message-ID: <3ECB97F3.B00C0C01@snf.stanford.edu>

All,

The freon 115 cylinder has 2-3psi remaining and it is now time to switch
to
freon 22. The change will occur tomorrow morning, Thursday, May 22, at
0700, one day earlier than originally scheduled.

Please see McVittie's May 13th memo for process changes

Thanks,

Dick