Moisture Sensitivity Level


Moisture Sensitivity Level

Moisture Sensitivity Level relates to the packaging and handling precautions for some semiconductors. The MSL is an electronic standard for the time period in which a moisture sensitive device can be exposed to ambient room conditions (approximately 30°C/60%RH).

Increasingly, semiconductors have been manufactured in smaller sizes. Components such as thin fine-pitch devices and ball grid arrays could be damaged during SMT reflow when moisture trapped inside the component expands.

The expansion of trapped moisture can result in internal separation (delamination) of the plastic from the die or lead-frame, wire bond damage, die damage, and internal cracks. Most of this damage is not visible on the component surface. In extreme cases, cracks will extend to the component surface. In the most severe cases, the component will bulge and pop. This is known as the "popcorn" effect.

IPC (Association Connecting Electronic Industries) created and released IPC-M-109, Moisture-sensitive Component Standards and Guideline Manual.

Moisture sensitive devices are packaged in a moisture barrier antistatic bag with a desiccant and a moisture indicator card which is sealed.

IPC-M-109 includes seven documents. According to IPC/JEDEC's J-STD-20: Moisture/Reflow Sensitivity Classification for Plastic Integrated Circuit (IC) SMDs, there are eight levels of moisture sensitivity. Components must be mounted and reflowed within the allowable period of time (floor life out of the bag).

  • 'MSL 6 - Mandatory Bake before use
  • MSL 5A - 24 hours
  • MSL 5 - 48 hours
  • MSL 4 - 72 hours
  • MSL 3 - 168 hours
  • MSL 2A - 4 weeks
  • MSL 2 - 1 year
  • MSL 1 - Unlimited

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Moisture Sensitivity Level — Der Moisture Sensitivity Level (MSL, dt. »Feuchtigkeitsempfindlichkeitsschwellwert«) bezieht sich auf die Feuchteempfindlichkeit von Halbleiterbauelementen bei der Verpackung, Lagerung und Montage. Hintergrund Kunststoffumspritzte SMD Bauelemente …   Deutsch Wikipedia

  • Moisture Sensitive Level — Der Moisture Sensitivity Level (MSL, dt. »Feuchtigkeitsempfindlichkeitsschwellwert«) bezieht sich auf die Feuchteempfindlichkeit von Halbleiterbauelementen bei der Verpackung, Lagerung und Montage. Inhaltsverzeichnis 1 Hintergrund 2… …   Deutsch Wikipedia

  • Level sensor — Level sensors are used to detect liquid level. The liquid to be measured can be inside a container or can be in its natural form (e.g. a river or a lake). The level measurement can be either continuous or point values. Continuous level sensors… …   Wikipedia

  • MSL — The acronym MSL may mean *Major Series Lacrosse *Major Soccer League *Malaysian Sign Language *Malaysian Super League *Mars Science Laboratory *Multimedia and Sensors Laboratory at Georgia Tech *Master of Studies in Law, a master s degree offered …   Wikipedia

  • Occam Process — The Occam Process is a solder free, Restriction of Hazardous Substances Directive (RoHS) compliant method for use in the manufacturing of electronic circuit boards and was developed by Verdant Electronics. It combines the usual two steps of the… …   Wikipedia

  • Restriction of Hazardous Substances Directive — European Union directive: Directive 2002/95/EC Directive on the restriction of the use of certain hazardous substances in electrical and electronic equipment Made by Council Parliament …   Wikipedia

  • Microphone — For the indie film, see Microphone (film). Microphones redirects here. For the indie band, see The Microphones. A …   Wikipedia

  • global warming — an increase in the earth s average atmospheric temperature that causes corresponding changes in climate and that may result from the greenhouse effect. [1975 80] * * * Potential increase in global average surface temperatures resulting from… …   Universalium

  • Explosive material — A number of 1.25lb M112 Demolition Charges, consisting of a C 4 compound, sit atop degraded weaponry scheduled for destruction An explosive material, also called an explosive, is a reactive substance that contains a great amount of potential… …   Wikipedia

  • plant disease — ▪ plant pathology Introduction       an impairment of the normal state of a plant that interrupts or modifies its vital functions.       All species of plants, wild and cultivated alike, are subject to disease. Although each species is… …   Universalium