Subject: | |
From: | |
Reply To: | |
Date: | Thu, 12 Jun 2008 16:12:32 -0300 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
Good day TechNet
A tin whisker question.
If (hypothetically, as this thankfully hasn't been built yet) a pure tin finish part is used, what sort of length whisker could happen?
What we are looking at is this: a part we want to use is only available with a pure tin finish on copper. Matte tin, not bright. So if we use it, and a tin whisker grows, how long might it grow? If the part is (for example) 10mm away from adjacent parts, and a realistic maximum whisker length is less than that, it obviously mitigates (YES, but does not entirely remove) the risk.
The only value I've seen is in a Dave Hillman/Doug Pauls presentation from Apex 05, wherein it is stated that they "can be 9.5mm long". Dave / Doug, any comment on this? Can you cite a source? Does matte vs bright tin make a difference?
regards,
Graham Collins
Halifax Production Engineering
(902) 873-2000 ext. 6215
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
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
-----------------------------------------------------
|
|
|