文档介绍:pcb设计检查标准(PCBdesigninspectioncriteria)PCBdesigninspectioncriteriaFirst,worktableconsistentTwo,pletionOutlinesizeConfirmtheoutlineisthelatestConfirmthecontourdiagramhasconsideredtheforbiddenwiringarea,thetransmissionside,theblockingstrip,parativefigures,confirmthePCBmarkdimensionsandtolerancesarecorrect,uratedefinitionVerifythattheprohibitedwiringareaonthecontourmaphasbeenshownonthePCBlayoutWhetherthedigitalcircuitandanalogcircuitareseparated,whetherthesignalf1owisreasonableornotIsclockdevicelayoutreasonable?Isthelayoutofhighspeedsignaldevicesreasonable?Whethertheterminationdeviceisproperlyplaced(theserialresistanceshouldbeplacedonthedriversideofthesignal,andtheotherterminalsshouldbeplacedonthereceivingendofthesignal)IsthenumberandpositionofdecouplingcapacitorsreasonableforICdevices?Arethelayoutandrelativepositionsofprotectivedevices(suchasTVS,PTC)reasonable?essfulexperiences?.Forexample,ponents(apacitor,crystaloscillator)asfarawayfromhigh-ponents,radiatorsandotherheatsourcesIsthedeviceheightconsistentwiththerequirementsfortheheightofthedevice?Intherangeof5mmaroundthecrimpingsocket,thefrontpartofthesocketisnotallowedtoexceedtheheightofthecrimpingsocket,ponents・Layasidespace・Andconsiderthefixedway,ponents,ponentsorprintedwirecollide,toleaveenoughspaceThemotherboardandthefender,asingleplateandabackplate,aconfirmationsignalcorrespondingcorrespondingposition,directionandidentifythecorrectscreenconnectorOpentheTOPandBOTTOMlayerPlace-bound,viewduetotheoverlapoftheDRCisallowedtowavesoldering,allowingthelayoutSMDtype:morethan0603(including0603)R,C,SOT,patchSOP(morethan1mmawayfromthepincenter)Wavesolderingsurface,SMDplacementdirectionshouldbeperpendiculartothewavesolderingPCBtransmissiondirectionInthewavesolderingsurface,(perpendiculartothePCBtransmissiondirection)(paralleltothePCBtransmissiondirection),・ponent100%placed?HaveyouupdatedthewrapperLibrary(checkingninningresultswithViewLOG)?DevicepackagingPrint