Tracing the stainless
May not be so painless
Mag properties of steel
As an answer may appeal
Drive the FA with a whip
And like Dewey's quip
Find the answer in a while
Bring the whole team a smile
Who's next in this thread
With a poem in their head?
To Friday I couldn't wait
Will Dewey rise to this bait?
..............8-)
John Burke
(408) 515 4992
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Leland Woodall
Sent: Wednesday, May 14, 2008 5:26 PM
To: [log in to unmask]
Subject: Re: [TN] Stainless Steel Contamination Question
Dewey,
I knew you'd appear sooner or later. Your quips are always quite
extraordinary.
Every thought about a part-time job as a quip writer? I'm certain someone
out there is after this kind of material. You might make zillions. Dozens
have done it with less.
Me? I'm just after little pieces of stainless steel at the moment, but
steel (or is that still?) can't find the stainless, nor a painless answer.
Yes I know, I've gotta improve my lines to get to your level.
As always, thanks for your entertainment!
Leland
________________________________
From: TechNet on behalf of Whittaker, Dewey (EHCOE)
Sent: Wed 5/14/2008 5:32 PM
To: [log in to unmask]
Subject: Re: [TN] Stainless Steel Contamination Question
Sounds like an attractive solution. I couldn't resist the residual
magnetism of this thread.
Dewey
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of John Burke
Sent: Wednesday, May 14, 2008 2:18 PM
To: [log in to unmask]
Subject: Re: [TN] Stainless Steel Contamination Question
You will find it - even if I have to get on a
plane......................8-)
Run a powerful magnet such as samarium cobalt (get them at any
hobby/craft
store) through the reflow system (running but heaters off ) - and any
other
process in the place.
When the magnets go in clean and come out covered in whiskers you found
the
problem.
John
John Burke
(408) 515 4992
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Leland Woodall
Sent: Wednesday, May 14, 2008 10:39 AM
To: [log in to unmask]
Subject: Re: [TN] Stainless Steel Contamination Question
Blair,
You just brought smiles to the faces of the guys in the Quality
Department.
Sadly enough, your prediction is probably going to be accurate in every
way.
Leland
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Blair Hogg
Sent: Wednesday, May 14, 2008 1:15 PM
To: [log in to unmask]
Subject: Re: [TN] Stainless Steel Contamination Question
Here's my prediction - you'll never find the source of these. They will
go
away on their own, leaving everybody to wonder from where they came.
Then, seven years from now, when everyone's forgotten about it, they
will return.
It is a wonder we're not all insane.
Blair
On Tue, 13 May 2008 09:47:15 -0400, Leland Woodall
<[log in to unmask]> wrote:
>Hi Everyone,
>
>
>
>We've had a problem lately with fine strands of stainless steel wire
>being found on top of some of our .5 mm pitch ICs. This has caused
both
>internal and external issues, and we've yet to identify the source.
>
>
>
>It's definitely formed wire, with a thickness ranging from 7 to 10
>microns, and up to 3 mm in length.
>
>
>
>Our automated optical inspection stations can only reliably detect
>widths of 12 to 15 microns.
>
>
>
>I've checked the internet in an attempt to find common applications of
>this wire. I've found two, and they were for ultra-fine filters and
>stencil screen mesh. We've investigated (I think) all of our machinery
>that would utilize filters this small and have found no such usage.
>I've also checked every stencil in our plant, and all of our mesh
>material is some type of a plastic compound.
>
>
>
>Do you have any idea where this stainless steel might be coming from?
>
>
>
>Any suggestions would be sincerely appreciated!
>
>
>
>Thanks,
>
>
>
>Leland
>
>
>---------------------------------------------------
>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
-----------------------------------------------------
---------------------------------------------------
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
-----------------------------------------------------
|