Content-Type: |
text/plain; charset="iso-8859-1" |
Sender: |
|
Subject: |
|
From: |
|
Date: |
Wed, 15 Sep 2004 11:03:45 -0400 |
MIME-Version: |
1.0 |
X-To: |
|
Reply-To: |
|
Parts/Attachments: |
|
|
We've seen this problem in the past. The main culprit, in our case, was the
solderability of the terminal on the corner of the swaged area. What looks
like a crack may be an unsolderable line around the periphery of the swaged
area. Try dipping the swaged end of a terminal into a solder pot and see if
the corner edge wets.
Jim Marsico
Senior Engineer
Production Engineering
EDO Electronics Systems Group
[log in to unmask] <mailto:[log in to unmask]>
631-595-5879
-----Original Message-----
From: Kerr, Bryan [SMTP:[log in to unmask]]
Sent: Wednesday, September 15, 2004 10:35 AM
To: [log in to unmask]
Subject: [TN] HMP Solder Joint Cracking
Hi
We are fitting a swaged turret terminal and soldering using 96% Tin
4%
Silver alloy and have experienced cracks running around the edge of
the
swage solder joint - between the pin and the solder. Re-soldering
gets rid
of it in most but not all cases. I have thought that perhaps some
stress
relaxation is occurring in the swage area (brass base material)
during
soldering resulting in these cracks.
Can anyone shed any light on this problem ?
Cheers
Bryan Kerr
Principal Quality Engineer
Process and Materials Laboratory
AMS Hillend
********************************************************************
This email and any attachments are confidential to the intended
recipient and may also be privileged. If you are not the intended
recipient please delete it from your system and notify the sender.
You should not copy it or use it for any purpose nor disclose or
distribute its contents to any other person.
********************************************************************
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
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 or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information,
or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------
|
|
|