Hi Rex - let me add a couple of comments. Rockwell Collins has been using
ENIG pwb finishes for since early 2004 and we have never had an issue with
black pad. We have had issues with ENIG solderability but we have had the
similar issues with ImAg, ImSn and HASL finishes. George has already
stated the requirement for obtaining good pwb surface finishes - develop a
good working relationship with your pwb fabricators and audit/inspect
their processes on occasion for compliance. All of the pwb surface
finishes have both advantages/disadvantages and all can be done
incorrectly. Completely eliminating a pwb surface finish choice from
possible use will eliminate the possibility of having its specific issues
but that practice also means you don't get to opportunity of its
advantages. There is no such thing as the perfect pwb finish with zero
risk.
Dave Hillman
Rockwell Collins
[log in to unmask]
Bob METCALF <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
08/03/2011 11:01 AM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
Bob METCALF <[log in to unmask]>
To
<[log in to unmask]>
cc
Subject
Re: [TN] Steps to take to prevent ENIG issues
Rex,
Your comments are heard all too often. It's a shame that ENIG gets a bad
rap because a fabricator is not following process recommendations
properly. I can assure you I have looked at hundreds of thousands of ENIG
boards over the years that process very well. ENIG does involve more
process steps than some other finishes and does require process control.
When an ENIG process runs out of control the results can be disastrous.
ENIG does however, have many positive attributes and is a very reliable
finish when processed correctly. Unfortunately when the process is not
controlled the resulting pain at the CM or OEM can be costly and
frustrating. I assure you though, there are many reliable PWB manufactures
that take process control seriously and produce consistently good ENIG
panels.
Regards,
Bob Metcalf
Western Regional Manager
Atotech USA Inc
1750 Overview Drive
Rock Hill, South Carolina 29730 USA
Mobile: 714-334-7667
e-mail: [log in to unmask]
Internet: www.atotech.com
Managing Director: Kuldip Johal
This e-mail and any attachments hereto are business documents of Atotech
USA Inc. and may contain CONFIDENTIAL OR PROPRIETARY BUSINESS INFORMATION.
Unauthorized disclosure and/or use of information contained in this
e-mail are prohibited. If you are not the intended recipient, you should
dispose of it and not use, disseminate or copy this message or any other
files transmitted with it.
.
From: Rex Waygood <[log in to unmask]>
To: <[log in to unmask]>
Date: 08/03/2011 08:50 AM
Subject: Re: [TN] Steps to take to prevent ENIG issues
Sent by: TechNet <[log in to unmask]>
Agree, don't use ENIG.
I am in the middle of a protracted ENIG problem which according to the
manufacturer is down to our processes and their tests of the board show
them to be perfect.
However in order to solder 4 power pad QFPs we are having to scrape off
the gold to get the nickel to solder.
Our production and a test at NPL shows the ENIG to be very poor.
ENIG is the pits.
Regards
Rex
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Wenger, George M.
Sent: 03 August 2011 16:43
To: [log in to unmask]
Subject: Re: [TN] Steps to take to prevent ENIG issues
The only guarantee is not to use ENIG. To minimize ENIG issues select a
good PCB fabricator and make sure they control their process.
Regards,
George
George M. Wenger
Senior Principal Reliability / FMA Engineer Andrew Corporation -
Wireless Network Solutions 40 Technology Drive, Warren, NJ 07059
(908) 546-4531 Office (732) 309-8964 Mobile
E-mail: [log in to unmask]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: Wednesday, August 03, 2011 11:17 AM
To: [log in to unmask]
Subject: [TN] Steps to take to prevent ENIG issues
I have a client who is switching PWB fabricators for ENIG finishes. They
are fully aware of ENIG issues such as Black Pad, Brittle Nickel, etc.,
and want to know whatever steps can be taken to prevent ENIG PWBs from
reaching production with these issues.
Does anyone have any suggestions?
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or
[log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For
additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or
[log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For
additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------
______________________________________________________________________
This email has been scanned by the MessageLabs Email
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 16.0
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
For additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 16.0
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
For additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 16.0
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
For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
