Werner,

Sorry, one thing I forgot to mention was that all our SM devices were
mounted in areas where there were stiffeners laminated to the flex.
Stiffener material was normally Aluminium or Stainless Steel but we also
used FR4 as well.

Regards,

Martin



===== Original Message from [log in to unmask] (TechNet E-Mail Forum.) at
30/09/00 02:39
>Hi Martin,
>Thanks for the input. The critical detail is your flex substrate; if this
>would have been rigid FR-4 I suspect the differences in SJ performance would
>have been more noticeable.
>Werner Engelmaier
>
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