TECHNET Archives

October 2006

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Condense Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Sender:
X-To:
TechNet E-Mail Forum <[log in to unmask]>, "Ingemar Hernefjord (KC/EMW)" <[log in to unmask]>
Date:
Tue, 17 Oct 2006 11:20:37 -0400
Reply-To:
TechNet E-Mail Forum <[log in to unmask]>, Jeffrey Bush <[log in to unmask]>
Subject:
MIME-Version:
1.0
Content-Transfer-Encoding:
quoted-printable
Content-Type:
text/plain; charset="us-ascii"
From:
Jeffrey Bush <[log in to unmask]>
Parts/Attachments:
text/plain (60 lines)
Looks like they did a gold flash.

Jeffrey Bush
Director, Quality Assurance and Technical Support
VERMONT CIRCUITS INCORPORATED 
           76 Technology Drive - POB 1890 
              Brattleboro, Vermont 05302
                Voice - 802.257.4571 ext 21
                    Fax - 802.257.0011
                       <http://www.vtcircuits.com/> 
                           

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ingemar Hernefjord
(KC/EMW)
Sent: Tuesday, October 17, 2006 10:05 AM
To: [log in to unmask]
Subject: [TN] ENIG problem

 
Hi amigos,
I should never said that we had no ENIG problems. Now we seem to have
one. Chinese board supplier. Problems with heavy wire aluminum bonding
on the ENIG pads. Too low pull test values. Possible reason: pad surface
invaded by copper particles after the bake/reflow/mounting. Sending
picture to Mr Yoda. Never seen this before. Gold is too thick for being
ENIG (>1um), Nickel about 6um. Can't see how Copper could diffuse to the
surface so rapidly and at those low temperatures which are typical for a
general assembly process. Any clue? Graham? You seem to be sitting at
the keyboard just now.
Ingemar Hernefjord
SAAB MICROWAVE SYSTEMS

---------------------------------------------------
Technet Mail List provided as a 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/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 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

ATOM RSS1 RSS2