Dave,
Sure: one I have (thanks to the newly installed xxx [no advertisement
here!] search engine I could even find it), and one I lost.
The one I have states:
1. Section 4.1.2 - both galvanic and immersion Au show
the biggest deformations, and also the biggest risk for cracks due to
the hard layers
2. Section 5 - that the retention force of the gold
coating is lower then the ImSn
CC&CE EMEA Development Engineering REPORT
Lead-free manufacturing Effects on press-fit connections
Authors: Eric Verhelst, [log in to unmask]; Tom Ocket,
[log in to unmask]
Tyco Electronics Belgium EC,
Siemenslaan 14,
8020 Oostkamp,
Belgium
Issued: July 2002
The one I lost contains the results of another comparison made by Tyco
between finishes, and is using even less forgiving words.
Regards
Ofer Cohen
Manager
Quality Assurance, Reliability and Production Technologies
Seabridge Ltd. - A Siemens Company
Siemens COM FN A SB TQM
_____
From: Dave Seymour [mailto:[log in to unmask]]
Sent: Thursday, July 28, 2005 3:48 PM
To: TechNet E-Mail Forum; Ofer Cohen
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
<mailto:[log in to unmask]>
YSTEMS.COM> <mailto:[log in to unmask]>
To
Sent by: TechNet [log in to unmask]
<[log in to unmask]> <mailto:[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]> <mailto:[log in to unmask]>
; Please respond
to
Phil Nutting
<PNutting@KAISERS
<mailto:[log in to unmask]>
YSTEMS.COM> <mailto:[log in to unmask]>
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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