Hi Guenter,

No apology necessary- everything is done with a smile!

Best regards,

David
----- Original Message -----
From: "Guenter Grossmann" <[log in to unmask]>
To: "Leadfree Electronics Assembly E-Mail Forum." <[log in to unmask]>; "David
Suraski" <[log in to unmask]>
Sent: Monday, January 03, 2000 3:24 AM
Subject: Re: [LF] Impacts of lead and copper...


> Hi Dave
>
> Would be great to get a copy of your tests. Not that I am too lazy to do
> the dirty work but I'd like to know what others do.
> Well Dave I think you are still a bit hurt by my comment I did in the last
> 1000 years. I really want to apologize for that. Never thought in hurting
> somebody.
>
> Best regards
>
> Guenter
>
>
> Guenter Grossmann
> Swiss Federal Institute for Materials Research and Testing EMPA
> Ueberlandstr. 129
> CH- 8600 Duebendorf
> Switzerland
>
> --------------------------------------------------------------------------
------
> --------------------------------------
>
> >Hi All,
> >
> >Happy holidays!  We've also done some tests pertaining to Cu and Pb in a
> >Pb-Free solder that will not be named due to fears of being flamed.
> >
> >Anyhoo, we found that Cu would not dissolve into this composition (which
had
> >an original Cu concentration of 0.7%) above 1% in a solder bath of 500F.
As
> >an aside, this alloy proved superior as far as limiting Cu dissolution as
> >compared to Sn/Pb, Sn/Ag, and even Sn/Cu. I imagine that this probably is
> >quite similar to Mr. Gickler's results.
> >
> >As far as Pb, the above alloy was tested with 0.5% pb-contamination
(which
> >was deemed to be a realistic contamination level that might be
experieinced
> >in the field) with "little or no degradation" to solder joint
reliability.
> >
> >I realize that the above may sound a bit subjective, but it actually was
> >determined through objective experimentation. If anyone (including Mr.
Yuen,
> >of course) would like to see a copy of these tests and their results,
please
> >feel free to contact me and I'll ship it off.
> >
> >Thanks and happy new year,
> >
> >David
> >AIM
>
>
>
>

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