From rcrane at snf.stanford.edu  Tue Mar 25 11:32:54 2003
From: rcrane at snf.stanford.edu (Dick Crane)
Date: Tue, 25 Mar 2003 11:32:54 -0800
Subject: [Fwd: Problem wbnonmetal 2003-03-24 23:37:20: BOE problem]
Message-ID: <3E80AEE6.11D40856@snf.stanford.edu>



Dick Crane wrote:

> Dan and wb users,
>
> I have seen this before here and at my previous company. I spoke with
> the supplier (Ashland Chemical at the time). The chucks are precipitated
> NH4F. Most likely, the delivery truck saw some cold weather during
> shipping. The chucks are slow to go back into solution. The bottles may
> be used as is, but the etch rate will be reduced. We are ordering more
> chemicals and monitoring our current supply.
>
> Dan, thanks for pointing this out.
>
> Dick