Bruce,
The component(s) in question doesn't have any intermatalic layer,
which would lead me to believe that the component was not plated. The
manufacturer of the component states that the component is alloy 42.
The x-sections revealed that the component was 46% Iron and 54% a
combination of Cadmium and steel. I also have some photos of the
x-sections if you would like to view them. I would have to send them
to you due to the fact I have not figured out how to share files on
www.driveway.com (any suggestions would be appreciated).
Regards,
Ron Waugh
Process Engineer
Diversified Systems, Inc.
Phone (317) 299-9547 Ext. #336
Fax (317) 298-2055
Email [log in to unmask]
______________________________ Reply Separator _________________________________
Subject: Re: [TN] Alloy 42
Author: "TechNet E-Mail Forum." <[log in to unmask]> "Misner Bruce"
<[log in to unmask]> at Internet-gateway
Date: 11/2/00 9:01 AM
Ron,
Wasn't there a Nickel plate over the Alloy 42? And something protective,
like Au, over the Nickel? What does the component manufacturers spec sheet
say for lead composition and finish?
Bruce Misner
> ----------
> From: Ron Waugh[SMTP:[log in to unmask]]
> Reply To: TechNet E-Mail Forum.;[log in to unmask]
> Sent: Thursday, November 02, 2000 8:27 AM
> To: [log in to unmask]
> Subject: [TN] Alloy 42
>
> Technetters,
>
> I have a huge problem with the wetting and solderability of a fine
> pitch 15 mil QFP. I then spoke with the solder supplier; which
> requested a couple of the components and performed x-sections.
> During
> the x-sections, they also performed a metal composition of the
> components lead. The metal in the leads turned out to be alloy 42,
> which is ....non-wetting???? ...."or so I'm told".
>
> I really don't know much about metals but the solder supplier stated
> that the component will never wet properly. I would really like to
> get some literature on this alloy 42 and ask if anyone else has had
> any of these problems and what was their fix.
>
> Thanks in advance for your time and energy.
>
> Regards,
>
> Ron Waugh
> Process Engineer
> Diversified Systems, Inc.
> Phone: (317) 299-9547 Ext. #336
> Fax: (317) 298-2055
> Email: [log in to unmask]
>
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