TECHNET Archives

December 2011

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:
Leland Woodall <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Leland Woodall <[log in to unmask]>
Date:
Tue, 6 Dec 2011 17:47:33 +0000
Content-Type:
text/plain
Parts/Attachments:
text/plain (1 lines)
I've seen this before as well on similar diode packages.  I don't think we were ever able to discover the actual root cause, though the supplier would almost certainly be the culprit.

Leland



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steven Creswick
Sent: Tuesday, December 06, 2011 12:20 PM
To: [log in to unmask]
Subject: [TN] NTC - Experimenting with new microscope camera

All,

I recently purchased a microscope camera and have been trying it out on various items.

Have placed two photos on the IPC website which I believe illustrate a tin [or solder plated] lead on which the plating has reflowed and squirted out from beneath the mold compound.

Have seen similar manifestations with improperly processed solder & glob-topped assemblies.

http://ipc-technet.groupsite.com/gallery/22093  filed alphabetically under folder name - Tin Plated Leads

Anyone else have other ideas?

Please keep in mind that this an old modem board of unknown chronological vintage that I had in my 'scrap bin'.  It just happened to be the subject of my scrutiny.

I see no evidence of solder balls, etc on the board.

Steve




______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

________________________________

“Confidentiality Notice:
This transmission (including any attachments) may contain confidential information belonging to the sender and is intended only for the use of the party or entity to which it is addressed. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, retention or the taking of action in reliance on the contents of this transmission is strictly prohibited. If you have received this transmission in error, please immediately notify the sender and erase all information and attachments.”

______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________




---------------------------------------------------

Technet Mail List provided as a service by IPC using LISTSERV 16.0

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

For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815

-----------------------------------------------------


ATOM RSS1 RSS2