IPC - Association Connecting Electronics Industries
Scope
PackagesNonhermeticThis standard applies to all nonhermetic SMD packages subjected to bulk solder reflow processes during PCB assembly@ including plastic encapsulated packages and all other packages made with moisture-permeable polymeric materials (epoxies@ silicones@ etc.) that are exposed to the ambient air.HermeticHermetic SMD packages are not moisture sensitive and do not require moisture precautionary handling.