mlcc贴片电容介绍

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1、Multi-layerCeramicCapacitor(MLCC)generalIntroductionW.Z.HuangWTCMarketingwz@passivecomponent.com0928-888-6251.MLCCconstructionandcharacteristic2.MLCCprocessflow3.MLCCPartsNr.(P/N)晶片電容微粒電容貼片電容ThedifferentnamesforMLCCMulti-layerCeramicCapacitorChipcapacitor多層陶瓷電容積層陶瓷電容

2、ConstructionofMLCCTerminationelectrodeCeramicdielectricC=k:DielectricconstantA:AreaofoverlappingelectrodesN:Numberofdielectriclayerst:Thicknessofdielectricf:Conversionfactor2.WhatisaCapacitor?k*A*(N)f*tTheprincipleofcapacitancedesigningCapacitance=ee0Ax(Ne-1)De0=8.84

3、1910-12F/mA=Area,(LeffxWeff)Ne=NumberofelectrodeD=Distanceofelectrodee=PermittivityofceramicUnit:F(farad,fromFaraday)DifferentdesignpatternsofMLCCFixedpatternVariablepatternFloatingpattern(1)(2)(3)(4)(5)(6)(1):Standard(2):Forinnerstressreduction(3):Forhighvoltagecap

4、abilityincreasing(4),(5),(6):ForcapacitancetuningMLCCmaterialandconstructionTheclassificationofceramicmaterialX7R,X5R,Y5V,Z5U1TemperatureCompensationNP0(C0G),N750(U2J)2HighDielectricConstantClassTCfeatureLinerfunctionofcap.withtemp.Non-linerfunctionofcap.withtemp.Typ

5、icalproductSymbolsoftemperaturecoefficients(EIA)forClassIC0GSignificantfigureoftemp.coeff.ofcap.(ppm/C)C=0B=0.3L=0.8A=0.9M=1.0P=1.5R=2.2S=3.3T=4.7V=5.6U=7.5Multiplierappliedtosignificantfigure0=-11=-102=-1003=-10004=-100005=+16=+107=+1008=+10009=+10000Toleranceoftem

6、p.coeff.(ppm)G=±30H=±60J=±120K=±250L=±500M=±1000N=±2500Ex.:C0G=NP0,.TC.=0(-1)30ppmC:0N:Negative0:-1P:PositiveG:30ppm0:0Class1:Ex.:C0G=NP0,T.C.=0(-1)30ppmC:0N:Negative0:-1P:PositiveG:30ppm0:0SymbolsofTemperatureCoefficientsClass2:Ex.:X7RX5R,or(B)Y5V,or(F)Z5UX:

7、-55CX:-55C,(-25C)Y:-30C,(-25C)Z:+10C7:+125C5:+85C,(+85C)5:+85C,(+85C)5:+85CR:15%R:15%,(10%)V:+22to-82%,(+30to-80%)U:+22to-56%SymbolsofTemperatureCoefficientsTemperaturecoefficientofclassIMLCCSymbolsoftemperaturecharacteristics(EIA)forClassIIX7RLowtemp.

8、(C)Z=+10Y=-30X=-55Hightemp.(C)2=+454=+655=+856=+1057=+1258=+1509=+200Max.cap.changeovertemp.range(%)A=±1.0B=±1.5C=±2.2D=±3.3E=±4.