Hi Graham!
We had big wetting problems with a tantalum cap last year and got a similar run-around, but the manufacturer did eventually admit to a plating problem and sent us documentation that they had since taken corrective action. But I suspect there were many other complaints and I suspect they didn't issue a general recall for their production lot.
Possibly they could wet to the parts a little better than we could because, like you, we are using RMA and they are evaluating the wettability with a more active aqueous based process, like the majority of CM's use.
Wayne Thayer
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Graham Collins
Sent: Friday, February 06, 2009 9:18 AM
To: [log in to unmask]
Subject: Re: [TN] Part solderability
Pin grid array parts, and they claim no change to their process... -
we both didn't change anything :-)
regards,
- Graham
-----Original Message-----
From: Steve Gregory [mailto:[log in to unmask]]
Sent: Friday, February 06, 2009 10:17 AM
To: TechNet E-Mail Forum; Collins, Graham (FN) @ ESI
Subject: RE: [TN] Part solderability
Hi Graham!
What kind of parts are these? Have they changed the plating recently on them?
Steve
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Graham Collins
Sent: Friday, February 06, 2009 8:12 AM
To: [log in to unmask]
Subject: [TN] Part solderability
Hi guys.
A while back I rejected a bunch of parts due to non wetting when we went to solder them.
The manufacturer has come back with a response to our guys, saying that they did a steam aging test on them and they passed fine. He wants to discuss it with us.
Obviously this is not good - they pass his test but I can't solder the things. Which makes me suspect his test... but makes him suspect my process. I don't know enough about steam aging tests to discuss this well. Obviously I need to ask what kind of flux he is using, but anything else?
Our process is SnPb, we use RMA flux, and the wave soldering machine runs at 500F for the pot. This is on an assembly that we have happily built for about 7 years, with the same manufacturer of part, and no process changes that I can identify as significant. The part is what I would call marginally solderable, if we hand solder it and put a fair bit of heat to the lead we can get it to solder, but not well or easily.
No previous soldering issues with the part.
regards,
Graham Collins
Halifax Production Engineering
L-3 communications Electronic Systems
(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
-----------------------------------------------------
---------------------------------------------------
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
-----------------------------------------------------
This e-mail and any files transmitted with it may be proprietary and are intended solely for the use of the individual or entity to whom they are addressed. If you have received this e-mail in error please notify the sender.
Please note that any views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of ITT Corporation. The recipient should check this e-mail and any attachments for the presence of viruses. ITT accepts no liability for any damage caused by any virus transmitted by this e-mail.
---------------------------------------------------
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
-----------------------------------------------------
|
