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June 1998

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Subject:
From:
David D Hillman <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 25 Jun 1998 09:23:52 -0500
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text/plain
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text/plain (98 lines)
Hi Rob - and there are a multitude of reference sources that show solder
dipped terminations are better than tin/lead plated terminations! If you
were needed coplanarity then a plated termination would be better than a
dipped termination. If you want solderability then (IMHO) a dipped
termination would be better than a plated termination. There is an IPC
technical report (IPC-TR-465-3) that the 002/003 committees completed that
shows some very interesting data of how a tin/lead plated finish ranks with
other alternative finishes (e.g. gold) in terms of steam aging resistance.
My experiences have shown that dipped (or fused) finishes had better
oxidation resistance than plated finishes but the TR-465-3 report
illustrates how a plated finish can be very robust. Storage conditions,
flux choice, and soldering process are other factors which can impact which
finish would be preferred. Good topic for the TechNet - which finish do you
prefer and why : dipped or plated.


Dave Hillman
Rockwell Collins
[log in to unmask]





Rob Schetty <[log in to unmask]> on 06/24/98 07:02:18 PM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond
      to Rob Schetty <[log in to unmask]>

To:   [log in to unmask]
cc:    (bcc: David D Hillman/CedarRapids/Collins/Rockwell)
Subject:  Re: [TN] Chip Termination Finish




There are a multitude of reference sources showing that tin-lead plated
terminations are much better than solder dipped.

Rob Schetty
LeaRonal Inc
Freeport, NY  USA
-----Original Message-----
From: Tom Lambert <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Wednesday, June 24, 1998 1:16 PM
Subject: [TN] Chip Termination Finish


>Hi Folks :  I just know many of you out there have knowledge re
termination
>finish of chip parts to pass along.  Specifically - is "hot solder dip"
any
>better/worse than "solder plate" ??  Thanx.
>
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