Has anybody seen brittle failures on ELECTROLYTIC NICKEL/Imm.Gold???
Gaby
----- Original Message -----
From: "Wenger, George M." <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, November 29, 2006 3:56 PM
Subject: Re: [LF] black pad
>I think that the fear of brittle failures with ENIG surface finish stems
> from the fact that there isn't a known root cause for the failure.
> Unfortunately, it appears that this research report doesn't calm those
> fears because the root cause is still unknown. I haven't read the
> report but it appears from the information Wolf-Dieter provided that we
> know exactly what we knew years ago:
>
> 1. ENIG Chemical Suppliers Provide Good Chemistry
> 2. Solder / Paste Suppliers provide Good Solder
> 3. Assemblers Use Good Soldering Processes
> 4. Therefore the problem must be some inaccuracies of cleaning and
> surface plating by some PCB fabricators.
>
>
> Regards,
> George
> George M. Wenger
> Senior Principle FMA / Reliability Engineer
> Wireless network Solutions
> Andrew Corporation, 40 Technology Drive, Warren, NJ 07059 (908) 546-4531
> [log in to unmask]
>
>
> -----Original Message-----
> From: Leadfree [mailto:[log in to unmask]] On Behalf Of SCHMIDT,
> WOLF-DIETER - PFHO
> Sent: Wednesday, November 29, 2006 3:19 AM
> To: [log in to unmask]
> Subject: [LF] black pad
>
> Hello Gaby,
>
> a few weeks ago the research report on that topic, carried out by Andus
> (PCB-manufacturer) and Fraunhofer Institute, was published. The result
> based on technical analysis and a poll asking a lot of PCB manufacturer
> as well as assembling companies showed that neither the type oc
> chemistry (e.g. the chemistry supplier) nor the type of solder nor the
> soldering process itself is the reason for black pad. The only remaining
> root seems to be some inaccuracies during running the board production
> process - mainly the chemistriy of cleaning and surface plating.
>
> The same information I received two years ago from Eric de Kluizenaar
> (ex Philips Eindhoven).
>
> Best regards
>
> Wolf-Dieter Schmidt
> -----------------------------------------------------------
> THALES Defence Deutschland GmbH
> Industrial Engineering
> Land & Joint Systems
> Ostendstrasse 3
> D-75175 Pforzheim - Germany
> -----------------------------------------------------------
> Phone: +49 7231 15 3386
> Fax: +49 7231 15 3390
> mailto: [log in to unmask]
> http://www.thalesgroup.com
>
> ------------------------------------------------------------------------
> -------Leadfee Mail List provided as a service by IPC using LISTSERV
> 1.8d To unsubscribe, send a message to [log in to unmask] with following
> text in the BODY (NOT the subject field): SIGNOFF Leadfree To
> temporarily stop/(start) delivery of Leadree for vacation breaks send:
> SET Leadfree NOMAIL/(MAIL) Search previous postings 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
> ------------------------------------------------------------------------
> -------
>
> ------------------------------------------------------------------------------------------------
> This message is for the designated recipient only and may
> contain privileged, proprietary, or otherwise private information.
> If you have received it in error, please notify the sender
> immediately and delete the original. Any unauthorized use of
> this email is prohibited.
> ------------------------------------------------------------------------------------------------
> [mf2]
>
>
> -------------------------------------------------------------------------------Leadfee
> Mail List provided as a service by IPC using LISTSERV 1.8d
> To unsubscribe, send a message to [log in to unmask] with following text in
> the BODY (NOT the subject field): SIGNOFF Leadfree
> To temporarily stop/(start) delivery of Leadree for vacation breaks send:
> SET Leadfree NOMAIL/(MAIL)
> Search previous postings 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
-----------------------------------------------------
|
