EN 60749-20-2003 半导体器件.机械和气候试验方法.第20部分:塑料封装的表面安装器件抗湿气和焊接热的综合影响
作者:标准资料网 时间:2024-05-19 09:01:51 浏览:8577
来源:标准资料网
【英文标准名称】:Semiconductordevices-Mechanicalandclimatictestmethods-Part20:Resistanceofplastic-encapsulatedSMDstothecombinedeffectofmoistureandsolderingheat(IEC60749-20:2002+Corr.1:2003);GermanversionEN60749-20:2003
【原文标准名称】:半导体器件.机械和气候试验方法.第20部分:塑料封装的表面安装器件抗湿气和焊接热的综合影响
【标准号】:EN60749-20-2003
【标准状态】:现行
【国别】:
【发布日期】:2003-12
【实施或试行日期】:2003-12-01
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:耐钎焊温度;抗湿;元部件;表面安装;电子设备及元件;机械试验;环境试验;热稳定性;表面安装设备;电气工程;电子工程;试验;气候试验;表面安装器件;半导体器件;集成电路;半导体
【英文主题词】:Climatictests;Components;Electricalengineering;Electronicengineering;Electronicequipmentandcomponents;Environmentaltesting;Integratedcircuits;Mechanicaltesting;Moistureresistance;Semiconductordevices;Semiconductors;SMD;Solderingtemperatureresistance;Surfacemounting;Surfacemountingdevices;Testing;Thermalstability
【摘要】:
【中国标准分类号】:L40
【国际标准分类号】:31_080_01
【页数】:25P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 煤矿许用导爆索技术条件 |
| 中标分类： |
化工 >>
其他化工产品 >>
火工产品 |
| 替代情况： | 被MT 519-2006代替 |
| 发布日期： | 1996-01-15 |
| 实施日期： | 1994-10-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2006-08-01 |
| 起草单位： | 煤炭工业部煤矿安全标准化技术委员会爆破技术及火工品分技术委员会 |
| 出版日期： | 1900-01-01 |
| 页数： | 9页 |
适用范围
没有内容
前言
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目录
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引用标准
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所属分类： 化工 其他化工产品 火工产品
【英文标准名称】:StandardTestMethodsforApparentPorosity,LiquidAbsorption,ApparentSpecificGravity,andBulkDensityofRefractoryShapesbyVacuumPressure
【原文标准名称】:用真空压力法测定成型耐火材料表观空隙率,吸水性,表观比重和体密度的标准试验方法
【标准号】:ASTMC830-2000(2011)
【标准状态】:现行
【国别】:
【发布日期】:2000
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:C08.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:显气孔率;表观比重;体密度;松散材料密度;水合作用;耐火形状;真空压力;吸水率
【英文主题词】:apparentporosity;apparentspecificgravity;bulkdensity;hydration;refractoryshapes;vacuumpressure;waterabsorption
【摘要】:Apparentporosity,waterabsorption,apparentspecificgravity,andbulkdensityareprimarypropertiesofrefractoryshapes.Thesepropertiesarewidelyusedintheevaluationandcomparisonofproductqualityandaspartofthecriteriaforselectionanduseofrefractoryproductsinavarietyofindustrialapplications.Thesetestmethodsareusedfordetermininganyorallofthesepropertiesandareparticularlyusefulfortestinghydratableproducts.Thesetestmethodsareprimarystandardmethodsthataresuitableforuseinqualitycontrol,researchanddevelopment,establishingcriteriaforandevaluatingcompliancewithspecifications,andprovidingdatafordesignpurposes.Fundamentalassumptionsinherentinthesetestmethodsare:Thetestspecimensconformtotherequirementsforsize,configuration,andoriginalfaces,Theopenporesofthetestspecimensarefullyimpregnatedwithliquidduringthevacuum-pressuretreatment,andTheblottingofthesaturatedtestspecimensisperformedasspecifiedinaconsistentanduniformmannertoavoidwithdrawingliquidfromthepores.Deviationfromanyoftheseassumptionsadverselyaffectsthetestresults.Inlaboratorystudiesinvolvingcastablespecimen,abiaswasnotedbetweenformed2x00D7;2x00D7;2in.(50x00D7;50x00D7;50mm)andspecimensquarteredfromlarger9x00D7;4.5x00D7;2.5in.(228x00D7;114x00D7;64mm)castspecimens.Additionally,anerrorintheapparentporositydeterminationwasfoundoncastableswheneverthespecimenswereheatedto1500x00B0;F(816x00B0;C)andthenexposedtowaterasasaturationmedia.Theerrorwasattributedtoreactivityofcementwithwaterandsubsequentre-hydrationofcementphases.Thehigherthecementlevelofthecastable,thegreatertheerrornoted.Itwasconcludedthatanerrorinporosityvaluescouldoccurforrefractorymaterialshavingapotentialtoformhydratedspecieswithwater.Testingunderthesameconditionsinkeroseneproducedresultsthatwerebelievedtobemoreaccurate,butthedatasuggestedthatthekerosenemightnothavesaturatedtheopenporesofcastspecimenasreadilyaswater.Certainprecautionsmustbeexercisedininterpretingandusingresultsfromthesetestmethods.Allfourpropertyvaluesareinterrelatedbyatleasttwoofthethreebasedatavaluesgeneratedduringtesting.Thus,anerrorinanybasedatavaluewillcauseanerrorinatleastthreeofthepropertyvaluesforagiventestspecimen.Certainoftheproperties,thatis,apparentspecificgravityandbulkdensity,arefunctionsofotherfactorssuchasproductcomposition,compositionalvariabilitywithinthesameproduct,imperviousporosity,andtotalporosity.Generalizationsonorcomparisonsofpropertyvaluesshouldbejudiciouslymadebetweenlikeproductstestedbythesetestmethodsorwithfullrecognitionofpotentiallyinherentdifferencesbetweentheproductsbeingcomparedorthetestmethodused.Whenaliquidotherthanwaterisused,suchastypesofkeroseneormineralspirits,specificgravitymustbeknownbyeitherdeterminationormonitoringonacontrolledbasis.Specificgravitywillchangeduetodifferentgradesofliquids,evaporation,orcontaminationwithdirtorforeignmaterial.Thetestshouldnotberuniftheliquidbecomesdirty,foamy,orchangescolor,becauseforeignparticlescanblockporesandpreventimpregnationofthesample.1.1Thesetestmethodscoverthedeterminationofthefollowingpropert......
【中国标准分类号】:
【国际标准分类号】:81_080
【页数】:5P.;A4
【正文语种】:
