Board finish is Cu with OSP. The cracks only show up on the ground pins and
not the signal pin. I'd only get an electrical fail if the center joint
cracked completely.
Thanks,
Cheryl Tulkoff
Phone:(512) 683-8586
Fax: (512) 683-8847
National Instruments
11500 N. Mopac Expressway
Building A
Austin, TX 78759-3504
Vladimir Igoshev
<[log in to unmask]
> To
Sent by: TechNet [log in to unmask]
<[log in to unmask]> cc
Subject
05/09/2005 03:56 Re: [TN] Suggested failure analysis
PM technique?
Please respond to
TechNet E-Mail
Forum
<[log in to unmask]>
; Please respond
to
Vladimir Igoshev
<[log in to unmask]
>
Hi Cheryl,
Unfortunately, it doesn't seem to exist. Particularly with hairline cracks
where electrical contact could be present. What is the finish on your
boards?
Regards,
Vladimir
Vladimir Igoshev, Ph. D.
Senior Materials Researcher
Research in Motion
451 Phillip St.
Waterloo, ON, N2L 3X2
Voice: (+1) 519-888-7465, ext. 5283
Fax: (+1) 519-886-0863
E-mail: [log in to unmask]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Cheryl Tulkoff
Sent: Monday, May 09, 2005 4:46 PM
To: [log in to unmask]
Subject: [TN] Suggested failure analysis technique?
I have a large lot of circuit boards where about 20% have small, hairline
solder fractures around some wave soldered PTH connector joints. We're
working on root cause analysis to prevent it from happening and repairing
the boards which have failed inspection. But, we're tying to figure out
what to do with the boards that have passed the inspection but may be at
risk. Quick and dirty tests have been unable to create fractures on these
joints and they pass visual criteria. Are there any quantitative tests
that could be performed on a sample to verify solder joint integrity? We
don't hae any historical data for comparison.
Thanks! Cheryl
---------------------------------------------------
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
847-615-7100 ext.2815
-----------------------------------------------------
---------------------------------------------------------------------
This transmission (including any attachments) may contain confidential
information, privileged material (including material protected by the
solicitor-client or other applicable privileges), or constitute non-public
information. Any use of this information by anyone other than the intended
recipient is prohibited. If you have received this transmission in error,
please immediately reply to the sender and delete this information from
your system. Use, dissemination, distribution, or reproduction of this
transmission by unintended recipients is not authorized and may be
unlawful.
---------------------------------------------------
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
847-615-7100 ext.2815
-----------------------------------------------------
---------------------------------------------------
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 847-615-7100 ext.2815
-----------------------------------------------------
|
