Ken,
After watching Bob's  videos, it is clear that the moisture in the board
can selectively affect only the PTH parts. So you may wish to bake the
boards after all.

Thanks, Bob! Those are amazing videos. I had heard of outgassing in PTH
holes, but I always thought it was due to entrapped contaminants inside
the hole, not moisture inside the PWB. Thanks for sharing the
information.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: Wednesday, April 16, 2008 12:49 PM
To: [log in to unmask]
Subject: Re: [TN] Out Gassing

Ok, by limiting it to wave solder and through-hole parts only, you have
narrowed it down to the wave solder flux or wave solder fluxing process.
I eliminated moisture on the PWBs as a cause, as you are not seeing any
issues with the SMT parts.
Therefore look at the flux itself or the fluxing process. Something went
wrong there over time.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ken Bloomquist
Sent: Wednesday, April 16, 2008 12:32 PM
To: [log in to unmask]
Subject: Re: [TN] Out Gassing

Kat,
I'm going to try and bake some but our oven only goes up to 140 degrees
F.
I'm not sure if that will do much. Any idea how long you'd have to bake
at 140 to do any good?

Richard,
The pinholes are on the through-hole components and come after wave
solder.
By sever I mean about 80% of the through-hole leads exhibit out gassing.
We run hundreds of boards through our wave solder every day and this is
the only board we're seeing this on.

Steve,
We just changed the flux Monday and we do a SG check on it every morning
to keep it in balance.

Dewey,
Play Misty for Me :-)

Roger,
Don't go there even though I'm having five bean soup for lunch, ooh!

Thanks,

KennyB
-----Original Message-----
From: Kathy Kuhlow [mailto:[log in to unmask]]
Sent: Wednesday, April 16, 2008 10:08 AM
To: 'TechNet E-Mail Forum'; Ken Bloomquist
Subject: RE: [TN] Out Gassing

Ken, 

What is the humidity been the last few days?  Can you bake some and then
repeat the run to see if the outgassing continues? I have had PCB's that
when baked lost pin holes/blow holes.

Kat


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

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