IEC 62435-6-2018 pdf download.Electronic components – Long-term storage of electronic semiconductor devices – Part 6: Packaged or finished devices.
This part of IEC 62435 on long-term storage applies to packaged or finished devices in long- term storage that can be used as part of obsolescence mitigation strategy. Long-term storage refers to a duration that can be more than 1 2 months for product scheduled for storage.
Phi- losophy, good working practice, and general means to facilitate the successful long-term storage of electronic components are also addressed.
2 Normative references The following documents are referred to in the text in such a way that some or all of their con- tent constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60749-20, Semiconductor devices – Mechanical and climatic test methods – Part 20: Re- sistance of plastic encapsulated SMDs to the combined effect of moisture and soldering heat
IEC 60749-20-1 , Semiconductor devices – Mechanical and climatic test methods – Part 20-1: Handling, packing, labelling and shipping of surface-mount devices sensitive to the combined effect of moisture and soldering heat JEDEC J-STD-020, Moisture/reflow classification for nonhermetic solid state surface mount devices JEDEC J-STD-075, Classification of non-IC electronic components for assembly processes
3 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following ad- dresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 storage environment specially controlled storage area, with particular control of temperature, humidity, atmosphere and any other conditions depending on the product requirements
3.2 critical moisture limit maximum safe equilibrium moisture content for a specific encapsulated device at reflow as- sembly or rework
3.3 long-term storage LTS planned storage of components to extend the life-cycle for a duration with the intention of supporting future use Note 1 to entry: Allowable storage durations will vary by form factor (for example; packing materials, shape) and storage conditions. In general, long-term storage is longer than 1 2 months.
3.4 LTS storeroom area containing components that have additional packaging for storage to protect from mois- ture or from mechanical impact or for ease of identification or handling
3.5 moisture-sensitive device MSD device that has moisture absorption or moisture retention and whose quality or reliability is affected by moisture
3.6 electronic device packaged electrical, electronic, electro-mechanical (EEE) item, or assemblies using such items
3.7 desiccant hygroscopic substance used to remove moisture from an atmosphere
3.8 moisture barrier bag MBB storage bag manufactured with a flexible laminated vapour barrier film that restricts the transmission of water vapour Note 1 to entry: Refer to IEC 60749-20-1 for packaging of moisture sensitive products.
3.9 humidity indicator card HIC card printed with a moisture sensitive chemical that changes, typically, from blue to pink in the presence of water vapour
3.1 0 water vapour transmission rate WVTR measure of permeability of MBBs to water vapour 3.1 1 dunnage all the matter stored in a moisture barrier bag that is additional to the packaged electronic component
3.1 2 electrostatic discharge ESD transfer of electric charge between bodies of different electrostatic potentials in proximity or through direct contact.IEC 62435-6 pdf download.