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February 2002

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Subject:
From:
Guenter Grossmann <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 26 Feb 2002 12:25:32 +0100
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Ivanoe

Intermetallic Growth = Diffusion. Thus not a problem of cycling but of alloy, temperature and time.
Formulas: Klein Wassink

Thickness: In my opinion no minimum as long as there is an Intermetallic layer that indicates that alloying took place.

Change in thickness from Sn63Pb37 to Sn62Pb36Ag2 = marginal, within the statistical spread of measurements.


Best regards


Guenter

.


EMPA
Swiss Federal Institute for Materials Testing and Research
Centre for Reliability
Dipl. Eng. Guenter Grossmann

8600 Duebendorf
Switzerland

Phone: xx41 1 823 4279
Fax :     xx41 1823 4054
mail:     [log in to unmask]

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