TECHNET Archives

May 1997

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Jim Herard <[log in to unmask]>
Date:
Wed, 28 May 1997 17:53:19 -0400
Content-Type:
text/plain
Parts/Attachments:
text/plain (62 lines)
Tin Whiskers are most common with Sn plating or unfused SnPb Plating.   Reflow
of the SnPb or alloying of the Sn are the best options.

As i recall, plating stresses and temperature increase the number of SnPb
whiskers,.

with eutectic solder you shouldn't be seeing them unless you have some strange
environmental conditions ,

Jim Herard
IBM Microelectronics Endicott
---------------------- Forwarded by Jim Herard/Endicott/IBM on 05-28-97 05:44 PM
 ---------------------------

        Tuan300859 @ aol.com
        05-28-97 05:08 PM
Please respond to [log in to unmask] @ internet


To: technet @ ipc.org @ internet
cc:
Subject: Tin Whisker

From:  Tuan300859

Currently, I have observed some boards with Tin Whiskers growth.  The
whiskers seem to grow from the Tin-lead pads(unusual).  The phenomenon is
occurred at only one side of the QFP180 component on the board.  Here are my
questions:

1.  What is/are the root cause(s) of the Tin Whisker?
2.  Are there experiments or tests that had been done?
3.  If no to both questions above,  Are there any literature that I can read
up to
     help determine the root causes of the Whisker?

Thank you in advance

***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To subscribe/unsubscribe send a message <to: [log in to unmask]>   *
* with <subject: subscribe/unsubscribe> and no text in the body.          *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact   *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]      *
***************************************************************************




***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To subscribe/unsubscribe send a message <to: [log in to unmask]>   *
* with <subject: subscribe/unsubscribe> and no text in the body.          *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact   *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]      *
***************************************************************************


ATOM RSS1 RSS2