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June 2004

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Subject:
From:
"David D. Hillman" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 10 Jun 2004 13:24:23 -0500
Content-Type:
text/plain
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text/plain (145 lines)
Hi folks! Don Cullen's committee (sorry, I forget the IPC task group
number) recently completed a very extensive electromigration test of
immersion silver as part of a UL acceptance/teaming exercise. Those test
results showed that the immersion silver did not migrate but the
electrolytic silver did. I recommend you contact John Perry for a copy of
the testing report. I have recently used the test data as topic information
in the "doesn't immersion silver migrate?" design team discussions.

Dave Hillman
Rockwell Collins
[log in to unmask]



                      Leo Higgins
                      <Leo_Higgins@ASAT        To:       [log in to unmask]
                      .COM>                    cc:
                      Sent by: TechNet         Subject:  Re: [TN] Immersion Silver finish and press-fit connectors
                      <[log in to unmask]>


                      06/10/2004 12:39
                      PM
                      Please respond to
                      "TechNet E-Mail
                      Forum."; Please
                      respond to Leo
                      Higgins







Any concern for Ag migration since the Ag is not dissolved into solder...

------------------------------------
Leo M. Higgins III, Ph.D.
Director of Applications Engineering / ASAT Inc.
[log in to unmask]
3755 Capital of Texas Hwy-So
Suite 100
Austin, TX     USA     78726
tel: 512-383-4593
fax: 512-383-1590
mobile: 512-423-2002
------------------------------------


-----Original Message-----
From: Whittaker, Dewey (AZ75) [mailto:[log in to unmask]]
Sent: Thursday, June 10, 2004 8:42 AM
To: [log in to unmask]
Subject: Re: [TN] Immersion Silver finish and press-fit connectors


Craig,
Although Immersion Silver is a good choice for a lot of reasons, it would
be
the last choice compared to all the others for applications dealing with
press-fit or compliant pins(IMHO).
Dewey

-----Original Message-----
From: Craig Cullum [mailto:[log in to unmask]]
Sent: Wednesday, June 09, 2004 6:27 AM
To: [log in to unmask]
Subject: [TN] Immersion Silver finish and press-fit connectors


Hello all,

We are considering switching from HASL to Immersion Silver finsih on our
PCBs.

How would this impact the 2mm press-fit connectors?

Anyone willing to share their experiences?

Thank you in advance.

Regards,
Craig

Craig Cullum, Engineering Technologist, AMTELCO
e: [log in to unmask]
   [log in to unmask]
f: 608 838 8367
v: 608 838 4194, or 4197, x128

Visit AMTELCO at www.amtelco.com

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