Content-Type: |
text/plain; charset="iso-8859-1" |
Sender: |
|
Subject: |
|
From: |
|
Date: |
Wed, 2 Feb 2005 08:57:04 +0100 |
MIME-Version: |
1.0 |
X-To: |
|
Reply-To: |
|
Parts/Attachments: |
|
|
Interesting. Why just few nanometers? We found that 0.5 to 1.5 um seemed to be quite normal.
I'll ask Mountain Jack to hang a skin on the wall. Not perfect a pic, but quite readable. In
this case, Xilinx helped me, their specialists are VERY skilled.
Ingemar Hernefjord
Ericsson Microwave Systems
PS. Steve, ready?
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Zweigart, Siegmund
Sent: den 1 februari 2005 15:12
To: [log in to unmask]
Subject: [TN] ENIG - Failures
Hello all
We see the following issue on an ENIG coated PCB (soldered with SnPb):
After reflow solder joint is ok but cross section shows a quite irregular
IMC phase (about 3 mikrometer thick, not homogenous, looks more like stones
on a plane)
After the following wave process (component is on the top side) solder joint
is very fragile and in the cross section some fractures are seen.
Has somebody any picture how a perfect IMC on ENIG should look like? I would
expect a homogeous layer just a few nm thick.
Any ideas?
Siggi
---------------------------------------------------
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
-----------------------------------------------------
|
|
|