I'm a bit confused (not unusual) by two paragraphs in IPC-6012
regarding lifted lands.
3.3.4 Lifted Lands. The finised board SHALL not exhibit any lifted
lands.
3.6.2.9 Lifted Lands. Lifted lands are allowed after thermal stress
provided that the visual criteria of section 3.3.4 are met.
So, is this telling me that lifted lands are okay as long as I can't
see them? (If I can't see them, how would I know they were lifted?)
Therefore, if there is visual evidence of a lift is it rejectable?
Was the intent to allow or dis-allow lifted lands after thermal
stress?
Thank you for any clarification.
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