TECHNET Archives

May 2001

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:
Genny Gibbard <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 14 May 2001 08:36:53 -0600
Content-Type:
text/plain
Parts/Attachments:
text/plain (66 lines)
So... I'm a little confused.  The NASA site and the article below completely
contradict each other.  Does anyone know the truth?  Does lead inhibit
whiskers or not?  Are whiskers really a problem with today's board fab
methods?
We tried a new board fab house, and asked for HASL like we always do.  They
tried to get us to use nickel gold, but we said no, so they provided us with
some sort of plated tin finish, because, I think, they are specializing in
the plated type finishes and don't have the ability to do HASL - not that
they told us that ahead of time.  Right about the same time, all the talk
about whiskers started up on this forum, and we don't know what to do with
these boards now.  Should we populate them or not?

-----Original Message-----
From: Guenter Grossmann [mailto:[log in to unmask]]
Sent: May 11, 2001 2:49 AM
To: [log in to unmask]
Subject: [TN] Pure Tin


I just read an article in the " Advanced Packaging, April 2001" about pure
tin plating with the result that no whiskers were found after 18 months
50°C/85%. Well, no secrets told in the article but quite interesting to read
another opinion. On www.apmag.com you can read the article after registering
searching the archive for the April 2001 issue and ignoring the tons of
advertising.

Have a great day

Guenter

Guenter Grossmann

Swiss Federal Institute for Materials Testing and Research EMPA
Centre for Reliability
8600 Duebendorf
Switzerland

Phone: xx41 1 823 4279
Fax :      xx41 1823 4054
mail:     [log in to unmask]

----------------------------------------------------------------------------
-----
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send the following message: SET
Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases >
E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700
ext.5315
----------------------------------------------------------------------------
-----

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------

ATOM RSS1 RSS2