Subject: | |
From: | |
Reply To: | |
Date: | Tue, 4 Mar 2008 08:59:38 +0100 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
I've also been looking for a spec, but found none. Guess it's hard to
make one with respect to all factors that are involved: the board's
cleanliness after last production step, the atmosphere in which the
board will be stored, gold plating thickness and porosity, humidity,
your planned mounting and soldering process etc. We have tested boards
that have been in office drawers for years, and which ones could be
soldered without problems, as well as we have had problems with same
type of boards coming directly from China.
Inge
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas McCall
Sent: den 3 mars 2008 15:53
To: [log in to unmask]
Subject: [TN] Max shelf life of a PWB since manufacture
Hi,
Does anyone know if there is an IPC specification that defines the
maximium time after manufacture for a bare PWB from the supplier. This
I guess would include the time sitting in the shelf at the supplier
before being shipped from them. The material is
FR4 and the finish is ENIG. I am assuming that the PWB would not have
to be pre-baked out before PCBA manufacture, but this could be done.
The board fab is in China.
Thanks for all input ...
DI McCall.
_________________________________________________________________
Who's friends with who and co-starred in what?
http://www.searchgamesbox.com/celebrityseparation.shtml
---------------------------------------------------
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
-----------------------------------------------------
|
|
|