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发表于 2008-10-31 16:58:50
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HALT-HighlyAcceleratedLifeTest
It’sadestructivetestinwhichthemainintentionistoforcefailuresoutatearlydesignstagetoallowimprovementchanges.usedatearlydesignstageofaproject,suchasPrototype,EVTandDVT.
Determinesaproduct’sdesignmargin.
Itconsistsofextremethermalstressandcyclingwithstepvibrationappliedtoaproducttoexposeitsdesignweaknesses.
TosupplyusefuldatafordevelopingaHASAorHASSscreen.
HASS-HighlyAcceleratedStressScreen
It’sanon-destructivetestbutstressfulenoughtoforcefailuresoutatproductionstage.
Alsoconsistsofextremethermalstressandcyclingwithstepvibrationappliedtoaproducttoexposemanufacturingdefects.
TemperatureandVibrationparametersarelessstressfulthanHALTbutstillaboveproductspecifications.
Usedonmassproductionstage.With100%sampling
HASA-HighlyAcceleratedStressAudit
It’susedatthemanufacturingstagetoexposeanymanufacturingflaws.
Preventsproductswithlatentdefectfromgettingintothemarket.
It’saNON-destructivetest
Conductsamplingtest,partofthefactories’qualityandreliabilityaudits.
SotheHALTistestedatthedesignstage,forfindingtheUUTweaknessesofdesign,produceprocess,components
HASSistestedatthePVTstage,forfindingtheweaknessesofproduceprocessandcomponents.
TheTestingFlow:
HALT---POS----HASS/HASA
[本帖最后由squallgao于2008-11-320:42编辑] |
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