Wanner,
Case size 1825 and larger should not be used on FR4 due to the CTE missmatch

on a ceramic part that large, however the 1812's should be OK. I would not
look to the FR4 as 
the problem but look at the Cap vendor and whether the caps have been on the
shelf too long'and moisture has 
invaded them. They may need to be pre-backed if the later problem is it.
Again verify with your cap vendor also.
Bob Wolfe
Executone


Wanner Berndard wrote
        Von:    Matthew Lamkin
[SMTP:[log in to unmask]]
        Gesendet am:    Freitag, 25. Juni 1999 09:26
        An:     [log in to unmask]
        Betreff:        Re: [TN] FW: What it would be like living in
Australia

        Well I don't know about being a joke, but I've saved it as a handy
        little utility.
        By selecting it from my start menu I can now turn a PCB that I am
        working on upside down to view it from another angle.

        Something that I have occasionally wanted to do. I can remember
actually
        going as far as turning the monitor on its side
        before, just so that I could view something from a different angle
        without upsetting everything else in the PCB file.... <g>
Hi technos, we have some problems with 1812 (and also with 1210) capacitors
on FR4 because cracks at the corner. Is there any size limit for SMT cap's
on FR4 (may be different classed for different application temperatures)?
Thanks, Bernhard, Zürich

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