Lifted lands!!!!:

Those who do not like the lifted land criteria in IPC-RB-276 will probablay
not like the requirement in IPC-6012 (interim final) which allows lifted
lands if not visually seen in the unstressed board inspection.  We can find
many reasons why lifted lands are not desirable ( i.e. possible entrapped
fluxes, loosened holes. cracked knees etc, but for product function, I have
never seen a functional failure resulting from lifted lands.  We allow
breakouts, 0.002 inch annular ring and the processing solutions to be in
contact with the bare-hole wall for an hour or so l during
desmear/electroless process; these could all result in the same condition
that may result from a lifted land.  I feel, as do many others, that lifted
lands are process indicator or a cosmetic defect and not related to the
performance of the board.

Phil Hinton 
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