Electrical-Thermal-Coupled-Solutions-for-Flip-Chip-Designs

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1、Electrical/ThermalCoupledSolutionsforFlipChipDesignsTheWayItWorks•FlowofSYMMIC–SYMMICisFEMthermaltool.–Thermalsourcesusetemplates•Definetemplatesandpre-definedones.–Placesourcesaroundlayout.–Solvesfortemperatureofheatequation.•WithMWO–LayoutisexportedfromMWOtoSYMMIC.–C

2、reatetableofdevicesandtemplates.–CreatetableofPowersatdevices.•ResistivenetworkisimportedbackintoMWOAWR2012DesignForum10/23/12SYMMIC–AThermalSolverforRFADeviceTemplatePower(HeatSource)FiniteElementMethod•SteadyState•TimeDomain(PulsedSourcewithDutyCycle)BoundaryConditio

3、nsSet•Adiabatic(noheatflow)•TemperatureGivenSymmetrySupportedSingleDeviceAWR2012DesignForum10/23/12SolutionforaSimpleFETSolutionofFETTablesofTemperaturesTheMeshSolveTime~1MinuteAWR2012DesignForum10/23/12LayouttheCircuitLayoutTemplateThelayoutisbuiltoutofindividualdevic

4、etemplates4FET’sinMMIClayoutCansimulateateachlevel(usingapproximateboundaryconditions)….Butyoudon’thavetoAWR2012DesignForum10/23/12CanContinueThroughMoreLevelsofHierarchyAWR2012DesignForum10/23/12FlipChipSolderBumponGaAsWithMMICResultsAWR2012DesignForum10/23/12MWOInter

5、faceADistributedMMICinMWOAWR2012DesignForum10/23/12SettingtheLayoutandPowerScriptsareusedtosendSYMMIC:•ThepositionoftheFETs•Thetypeoftemplatetouse•Theinitialpowerlevelofeachdevice.Thelayoutiscreatedasanxmlfile.Thepowertableisatext(CSV)file.AWR2012DesignForum10/23/12Ent

6、eringtheLayoutandPowerintoSYMMICTheLayoutandPowerareEnteredDeterminesDeviceTemperaturesAWR2012DesignForum10/23/12TheResultsWeneedtogetthetemperaturesbackintoMicrowaveOffice.SYMMICsolvesforathermalimpedancematrix.TemperatureatDevicePoweratDeviceTheThermalImpedanceMatrix

7、AWR2012DesignForum10/23/12CreatinganEquivalentElectricalNetworkHeatEquationRCCircuitEquation•ParabolicEquations•SteadyState–ResistiveNetwork•TimeDomain–RCDecayConstantDevicePowerNodeCurrentDeviceTemperatureNodeVoltageAWR2012DesignForum10/23/12ImportingtheNetworkinMWOTh

8、enetworkiswrittenasascriptforthesteadystatesolution.Afunctionisdefined:T=Temps(inputpower,ambienttemperature)Tisthete