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PCB moisture content

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#50940

PCB moisture content | 6 July, 2007

According to IPC-A-600, measling can occur in epoxy-glass boards when the moisture content of the board is above 0.3wgt%. Is this the industy acceptance standard for max moisture content of a board?

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#51057

PCB moisture content | 16 July, 2007

We're aware of no industy acceptance standard for max moisture content of a board.

For more on moisture levels, get a copy of: "Removing Moisture from Electronic Components and Assemblies", CS Leech, Jr, Circuits Assembly, May 1994. The article discusses: * Some of the basic physics of water loss in detail - especially the issue of vacuum moisture removal. * Vaporization of water via vacuum may as not be the most effective moisture removal method in all instances [change of physical states (liquid to vapor) can result in the formation of ice (the article describes a neat demonstration of this reaction) which impedes the removal of water from a board].

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