Reggie
    Did I miss something?  Your product operating temperature is above the melting point of the 63/37
solder you are using?

    I suppose my major concern on the long term reliability of solder joints operating in a high
temperature environment would be embrittlement due to intermetalic growth.

Gary Camac

Rupert, Martha L. wrote:

> Reggie,
>
> I remember an article published in "SMT's The Next Step" (the little
> "brochure" which comes with the SMT magazine) written by Jennie Hwang.
> (These "brochures" aren't dated so I can't tell you exactly which month to
> look at.)  Part of the article noted the change in physical property of
> solder in response to change (basically an increase) in temperature.  The
> article included an interesting graph depicting this change in solder
> physical property vs temperature.
>
> I underlined the word solder because that was the main focus; not a solder
> joint.  However, I believe there was some reference to solder joints.
>
> I believe I kept this article.  If you'd like, send me your fax and when I
> find it, I'll forward it to you if you'd like.
>
> Martha Rupert
> AMP Incorporated
> [log in to unmask]
>
> > -----Original Message-----
> > From: Malli, Reggie [SMTP:[log in to unmask]]
> > Sent: Tuesday, October 20, 1998 4:44 PM
> > To:   [log in to unmask]
> > Subject:      [TN] Thermal Aging Of Solder Joints
> > Importance:   High
> >
> > Hello there!
> >                 I'ld like to get some information regarding the  thermal
> > aging of solder joints, particularly with the following conditions:
> >
> > 1.      Solder used:
> >                 63/37  and 96/04 (4% silver)
> >
> > 2.      Product operating temperature; 187C
> >
> >         What I'm really looking for is the behaviour of solder joint
> > strength as a function of temperature. If you have any related reports or
> > literature, please email it to me or link me to the source.
> >
> >         Thanks for your help,
> >
> >         Sincerely,
> >
> >         Reggie Malli
> >         Manager Process Engineering
> >         Glenayre Manufacturing Ltd.
> >         Phone: 604-293-1611
> >         Fax: 604-293-4390
> >         Email: [log in to unmask]
> >
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