keeping design rules such tear drops can help.
100% ET Net list test should be done.
Best Regards
ROKAH Reuven
e mail: [log in to unmask]
"Mcmaster,
Michael" To: [log in to unmask]
<mike.mcmaster@M cc:
ERIX.COM> Subject: Re: [TN] PCB_OPEN_VIAS_PROBLEMS
Sent by: TechNet
<TechNet@LISTSER
V.IPC.ORG>
20/05/03 02:16
AM
Please respond
to "TechNet
E-Mail Forum.";
Please respond
to "Mcmaster,
Michael"
I suppose anything can be negotiated. We sometimes have customers that
waive electrical test on very simple boards. They usually don't want to
pay (or wait) for a test fixture to be built. You can in theory use a
flying probe tester to avoid fixture costs and lead times, but these
testers are relatively slow and increase the amount of time at test.
I can imagine that in the case of a relatively simple prototype where speed
was of the essence, one might forego a fixture and flying probe test a
single board. This would save time and money. But I consider this very
unusual and certainly not something you want to do on an ongoing basis.
The time and money savings are only good until the first inevitable failure
occurs and unfortunately, you are now seeing the results and no longer
saving neither time nor money.
Mike McMaster
RF Product Engineer
Merix Corporation
503-992-4263
----------
From: Charles Caswell[SMTP:[log in to unmask]]
Reply To: TechNet E-Mail Forum.;Charles Caswell
Sent: Monday, May 19, 2003 2:24 PM
To: [log in to unmask]
Subject: Re: [TN] PCB_OPEN_VIAS_PROBLEMS
I agree and so does the project engineer, he was very unhappy to hear
this. This is what we were told by the former QE on the job. I am
still waiting for more info from quality. Of course they may not
choose to tell us production types.
Charles
-----Original Message-----
From: Fineline Circuits, Inc. [mailto:[log in to unmask]]
Sent: Monday, May 19, 2003 7:11 PM
To: TechNet E-Mail Forum.; Charles Caswell
Subject: Re: [TN] PCB_OPEN_VIAS_PROBLEMS
Charles:
If electrical testing is required and paid for, all the boards
should have
been netlist tested or they could have netlist tested the golden
board and
used this golden board to test the remaining batch on a bed of nails
tester.
But in either case all the boards should have been tested and one
with any
opens either fixed and retested or crossed out.
Sona
Fineline Circuits Inc.
----- Original Message -----
From: "Charles Caswell" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, May 19, 2003 1:23 PM
Subject: Re: [TN] PCB_OPEN_VIAS_PROBLEMS
In our case I have been told that the netlist testing is only done on
one
out of the lot.
Charles
-----Original Message-----
From: Fineline Circuits, Inc. [mailto:[log in to unmask]]
Sent: Monday, May 19, 2003 4:26 PM
To: [log in to unmask]
Subject: Re: [TN] PCB_OPEN_VIAS_PROBLEMS
Wesley:
Weren't these boards tested by your board supplier? Electrical
testing
should have failed the boards with the open vias . The vias may have
voids
due to bad drilling and deburring which may clog the hole, poor smear
removal or malfunction of the electroless copper line-trapped air or
could
be plating voids. Cross section of the open vias should pinpoint the
problem.
Sona
Fineline Circuits Inc.
---------------------------------------------------
Technet Mail List provided as a free 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/html/forum.htm for
additional
information, or contact Keach Sasamori at [log in to unmask] or
847-509-9700
ext.5315
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a free 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/html/forum.htm for
additional
information, or contact Keach Sasamori at [log in to unmask] or
847-509-9700
ext.5315
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a free 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/html/forum.htm for
additional
information, or contact Keach Sasamori at [log in to unmask] or
847-509-9700 ext.5315
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a free 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/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700
ext.5315
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a free 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/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------
|
