Hi everybody,

Does anybody know how do we determine the Maximum Acceptable Moisture Content (MAMC) for a board?

I understand that IPC-1601 states that for most designs a MAMC between 0.1% and 0.5% of moisture weight to resin weight is adequate. However, it does not describe the basis to establish the range. I can think of many variables that can affect this number like minimum pitch, voltage across, component clearance, whether the board gets conformal coating or not, etc. I would like to know if anybody knows of a safe method to determine the MAMC for a given board.

Paul... I can already see your "it depends" coming... :)!

Thanks for the help!

Rigo Garcia

Sr. Quality Assurance Engineer
Workmanship Standards, Code 300
NASA, Goddard Space Flight Center
Greenbelt, MD  20771
Phone. (301) 286-6129
Fax.       (301) 286-6576


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