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Thu, 27 Sep 2018 09:47:45 -0500 |
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Joyce,
Most of the SMTs in modern electronics have solder as their ONLY means of mechanical support.
(but I have also been in the industry since the 1980's, so I remember books like that!)
I always enjoy reading about your experience,
Jack
On Thu, 20 Sep 2018 10:07:18 -0400, Yuan-chia Joyce Koo <[log in to unmask]> wrote:
>according to my book (old), you should NOT count on solder as
>mechanical support of ANY kind. solder is intended to provide
>electrical connect, use solder, especially high temp solder (assume
>you are going to use it at elevated temp for service, or assembly
>sequence - such as multiple reflows... it is difficult to count on
>microstructure to be the same as you initially put down).
>as for FEM purpose, I would use 50% book value that tell you - if
>i were you...
>my 1.5 cents.
>jk
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