Hi,
Does the amount of copper shown indicate that it is electrode-less only
copper?
Maybe they missed the copper plate up step? Would electrode-less copper be
thicker than what was shown?
Thanks,
Bob Kondner
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez
Sent: Wednesday, September 09, 2009 12:44 PM
To: [log in to unmask]
Subject: Re: [TN] PTH problem
IMHO, the board would have to be lost under the conveyor belt for an
extended period of time to attack the hole wall plating during the OSP
process. Otherwise, this is a copper plating bath issue.
Victor,
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ian Hanna
Sent: Wednesday, September 09, 2009 10:41 AM
To: [log in to unmask]
Subject: Re: [TN] PTH problem
The micro-etch only explains why they did not show as opens at
electrical test...they avoid describing any sort of root cause
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Wenger, George M.
Sent: Wednesday, September 09, 2009 11:26 AM
To: [log in to unmask]
Subject: Re: [TN] PTH problem
Richard is correct that your picture illustrates poor coppe
Jim,
Richard is correct that your picture illustrates poor copper plating.
This problem wasn't caused because there was a micro-etch prior to OSP.
There is always a micro-etch of the plated copper prior to applying the
final surface finish.
Regards,
George
George M. Wenger
Andrew Solutions
Senior Principal FMA/Reliability Engineer
40 Technology Drive, Warren, NJ 07059
(908) 546-4531 (Office) (732) 309-8964 (cell)
[log in to unmask]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: Wednesday, September 09, 2009 10:56 AM
To: [log in to unmask]
Subject: Re: [TN] PTH problem
The pictures illustrate poor copper plating in the via hole walls that
could be due to a number of reasons, all from fabrication issues. There
should be at least a .001" thick continuous copper wall inside the via,
but these pictures represent a very bad copper plating process.
I have never heard of the OSP process causing copper to be further
reduced.
I would not use any of these boards, even if they pass flying probe
test, and I would not use that board supplier again.
Just because they pass test as a bare PWB does not mean they will be
reliable later; they could fail due to the vias opening up when the
board is heated or slightly stressed.
But I will sleep well tonight knowing that when the operators eat their
food off of these PWBs they will not be contaminated with lead.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of J W
Sent: Wednesday, September 09, 2009 9:41 AM
To: [log in to unmask]
Subject: [TN] PTH problem
Hi TechNet group,
I'm really getting nervous about a China bare board supplier and their
quality and need your opinions. Please take a look at the picture by
clicking on the link below showing two plated through holes (via's).
The
problem reported originally was a bad ground connection between ground
via's
and ground planes. As you can see, the pictures are very telling, and
you
can clearly see the ground plane not connected (several planes not
connected
actually). What I'm also nervous about is the comment listed below the
pictures "The plated copper on PTH surface will be etched thin after OSP
process". Is that statement correct? I'm not a bare board expert by
any
means, but I believe a PTH should have a little more copper than what is
shown? I know that OSP is not something new, so are other board
suppliers
dealing with the same issue of possible thin PTH walls because of OSP?
I also submitted pictures early last week regarding the same supplier
having
problems with the their solder mask process, so to me, I'm thinking this
board shop is not up to standards and we should inform out board
assembler
house to look for another supplier...immediately?
Thanks for your help!
Jim
http://stevezeva.homestead.com/PTH_Connection_issue.jpg
---------------------------------------------------
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 message is for the designated recipient only and may
contain privileged, proprietary, or otherwise private information.
If you have received it in error, please notify the sender
immediately and delete the original. Any unauthorized use of
this email is prohibited.
------------------------------------------------------------------------
------------------------
[mf2]
---------------------------------------------------
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
-----------------------------------------------------
---------------------------------------------------
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
-----------------------------------------------------
|
