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July 2005

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Subject:
From:
Kerry McMullen <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Thu, 28 Jul 2005 10:09:59 -0400
Content-Type:
text/plain
Parts/Attachments:
text/plain (230 lines)
I have no data on pressing into ENIG plated Backpanes, but I have about 7
years doing it on .250" thk ENIG backplanes pressing Teradyne VHDM
compliant connectors (roughly 6,000 IO per backplane) and I have had no
issue.  The biggest thing is to make sure your backplane house can achieve
the +.002/-.002 tolerance.






Dave Seymour <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
07/28/2005 09:47 AM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
Dave Seymour <[log in to unmask]>


To
[log in to unmask]
cc

Subject
Re: [TN] RoHs board surface recommendations.






Ofer,

The statement "that bans the ENIG from use when Press-Fit connectors are
installed."
is interesting.

Do you have articles or data that show support this statement?

Thanks,.
Dave




Ofer Cohen wrote:

>Phil,
>Rubber glove and immersion Silver?
>
>Apropos the encompassing statement - not to mention the good ol' black
>pads (that still show their face here and there, in spite of the better
>chemistry), there is the Ni brittleness, that bans the ENIG from use
>when Press-Fit connectors are installed.
>
>Regards
>Ofer Cohen
>Manager
>Quality Assurance, Reliability and Production Technologies
>Seabridge Ltd. - A Siemens Company
>Siemens COM FN A SB TQM
>
>
>
>>-----Original Message-----
>>From: TechNet [mailto:[log in to unmask]] On Behalf Of Phil Nutting
>>Sent: Thursday, July 28, 2005 3:24 PM
>>To: [log in to unmask]
>>Subject: Re: [TN] RoHs board surface recommendations.
>>
>>Doug,
>>
>>Sometimes my all encompassing statements do not give enough of the
>>
>>
>nitty
>
>
>>gritty details.  Too often when I start with the details I can see my
>>listener's eyes roll into the back of their head.
>>
>>OK.  Would it help if I said it has fewer issues?   From our research
>>with Immersion Silver we need to keep the boards sealed until use them
>>and then handle with rubber gloves.  Immersion Tin is a little more
>>forgiving on storage and can be handled with cotton gloves.  ENIG
>>
>>
>seems
>
>
>>to be less affected by storage and handling.
>>
>>If I'm WAY off base, I apologize and retreat in disarray.
>>
>>Phil
>>
>>-----Original Message-----
>>From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas O. Pauls
>>Sent: Thursday, July 28, 2005 9:12 AM
>>To: [log in to unmask]
>>Subject: Re: [TN] RoHs board surface recommendations.
>>
>>Whoa.  Back up the trolley.  All boards have handling and storage
>>issues.
>>Maybe not from a solderability perspective but certainly from a
>>cleanliness
>>perspective.
>>
>>Never make all encompassing statements, which, come to think of it, is
>>an
>>all encompassing statement........
>>
>>Doug Pauls
>>
>>
>>
>>
>>             Phil Nutting
>>             <PNutting@KAISERS
>>             YSTEMS.COM>
>>To
>>             Sent by: TechNet          [log in to unmask]
>>             <[log in to unmask]>
>>cc
>>
>>
>>Subject
>>             07/28/2005 08:03          Re: [TN] RoHs board surface
>>             AM                        recommendations.
>>
>>
>>             Please respond to
>>              TechNet E-Mail
>>                   Forum
>>             <[log in to unmask]>
>>             ; Please respond
>>                    to
>>               Phil Nutting
>>             <PNutting@KAISERS
>>                YSTEMS.COM>
>>
>>
>>
>>
>>
>>
>>And ENIG has no handling and storage issues like Immersion Silver and
>>Immersion Tin.
>>
>>-----Original Message-----
>>From: TechNet [mailto:[log in to unmask]] On Behalf Of Edwin Louis
>>Sent: Thursday, July 28, 2005 8:49 AM
>>To: [log in to unmask]
>>Subject: Re: [TN] RoHs board surface recommendations.
>>
>>If you are talking about PWB metallization, I would recommend ENIG. It
>>is
>>compatible with both Tin/Lead and Lead-free.
>>
>>-----Original Message-----
>>From: TechNet [mailto:[log in to unmask]] On Behalf Of Barry Gallegos
>>Sent: Thursday, July 28, 2005 8:27 AM
>>To: [log in to unmask]
>>Subject: [TN] RoHs board surface recommendations.
>>
>>Good Day TecNetters.
>>
>>Does anybody out there have Board surface recommendations for a RoHs
>>process
>>?
>>
>>A matrix would be preferred. I don't seem to recall seeing any such
>>
>>
>type
>
>
>>of
>>document
>>or discussions on TechNet so any help would be greatly appreciated.
>>
>>Barry
>>Western Electronics.
>>
>>
>>
>>
>>---------------------------------------------------
>>
>>

--
Dave Seymour, CID+
Catapult Communications Inc.
800 Perimeter Park Dr, Suite A
Morrisville, NC 27560

Direct: (919)653-4249
Main: (919)653-4180
Fax: (919)653-4297

[log in to unmask]



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