Hi Bev - Yes, I have seen an overly oxidized solderspheres on a BGA. But I
have observed this phenomena only once (and I have been lots of BGAs in
production!).

Dave Hillman
Rockwell Collins
[log in to unmask]



                      Bev Christian
                      <[log in to unmask]        To:       [log in to unmask]
                      ET>                      cc:
                      Sent by: TechNet         Subject:  [TN] Old Array Devices
                      <[log in to unmask]>


                      12/08/2003 10:44
                      AM
                      Please respond to
                      "TechNet E-Mail
                      Forum."; Please
                      respond to Bev
                      Christian






Good morning,
Have any of you ever seen an array device that did not solder because of
oxidation of the eutectic solder balls on the device?  To be clear, I am
excluding organic contamination, insufficient reflow temperature
conditions, poor paste, poor boards, misregistration, etc. - just
considering oxidation.  Thanks.

Bev Christian
Research in Motion

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