标签: coating

PowderCoating

摘要：“锡晶须”是不是一个富有想象力，电子制造业的某些方面的幻想任期。锡晶须是真实的。他们是来自纯锡表面的微观导电纤维，它们构成了严重的问题，所有类型的电子产品。这些胡须可以形成电气路径，从而影响了主体设备的操作。本文讨论了去除铅从电子所造成的问题，并介绍了一些技巧，以减轻锡晶须。Maxim>DesignSupport>TechnicalDocuments>Tutorials>GeneralEngineeringTopics>APP5250Keywords:Tinwhisker,conformalcoating,SnPbfinish,leadfree,rohs,NiPdAu,NickelPalladiumGold,PbDec13,2011TUTORIAL5250TinWhiskersAreRealandComplexBy:JohnO'Boyle,SeniorBusinessManager,MilitaryandAerospaceBusinessUnitDec13,2011Abstract:"Tinwhiskers"isnotanimaginative,fancifultermforsomeaspectofelectronicsmanufacturing.Tinwhiskersarereal.Theyaremicroscopicconductivefibersemanatingfrompuretinsurfaces,andtheyposeaseriousproblemtoelectronicsofalltypes.Thesewhiskerscanformelectricalpaths,whichaffec……

applicationoftheimpedanceformalismtodiffractiongratingswithmultiplecoatinglayersApplicationoftheimpedanceformalismtodiffractiongratingswithmultiplecoatinglayersAnandaK.CousinsandS.C.GottschalkThestandardmethodofmatchingboundaryconditionsattheinterfacesofamultilayerplanedielectricstackisolateddielectricstackwithanincidentpropagatingbeamthereisnoneedtocalculatetheevanescentorders;however,whenadiffractiongratingisburiedunderthestackthereismixingoforders,anditmaybeimportanttocalculatetheevanescentaswellasthepropagatingorders.Itisshownthattheimpedanceformalismremovesthenumericalinstabilitycompletely.Thismethodmaybecoupledtoeitherboundaryintegralordifferentialequationmethodsforthegratingtoprovidethecompletesolutionforthegrating-stacksystem.isshowntoben……