Subject: | |
From: | |
Reply To: | TechNet E-Mail Forum. |
Date: | Tue, 28 Sep 1999 21:46:24 -0700 |
Content-Type: | multipart/mixed |
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Paul, wake up. Thought you and Steve would be interested in one of our
normal MLB's.
Enjoy,
Earl
----- Original Message -----
From: Paul Klasek <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, September 07, 1999 4:02 PM
Subject: Re: [TN] FW: Susceptibility of surface finishes to skin oils
> Good practice Bruce ; as you said: than it works in store ;
> and the result is very variable :
> It is commonly known as "rust finger" nickname in toolmakers circles :
> when you have a highly polished XYQZ supersteel moulding tool ;
> some of the unfortunate fellows are literally banned from work on fishing
> stages .
> As the body acids do vary (you tell me, coke?, bad wine?, hormones?);
> to see fingerprints developing on running tool is expensive business .
> Gold I didn't see as critical as osp .
> Our guys are trained : hold the edges only (anytime) .
> They usually remember that only when I'm around .
>
> PAUL
>
> -----Original Message-----
> From: Bruce Tostevin [mailto:[log in to unmask]]
> Sent: Wednesday, 8 September 1999 6:06
> To: [log in to unmask]
> Subject: [TN] FW: Susceptibility of surface finishes to skin oils
>
>
> > Is anyone aware of data or studies on whether or not, gold and OSP
surface
> > finishes are more susceptible to surface oils than HASL? We wear
cotton
> > gloves at incoming inspection, and on several smt lines, where we
inspect
> > and run non-HASL boards. There is a concern about fingerprint oils
> > degrading the finish on an OSP board, which may sit several weeks in
> > storage, and the concern with the immersion gold boards is that the thin
> > finish is porous, and skin oils might cause nickel oxidation. Is anyone
> > else doing this, or are we overly concerned about the vulnerability of
> > these finishes to skin oils?
> >
> > Bruce Tostevin
> > Benchmark Electronics
> > Hudson, New Hampshire
> >
>
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