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1、SMTPCB/PanellayoutSMTTeam2015-03-22PCBDesignGuidelineRevisionrecordRev.DateChangeDescription02015/4/17NewreleasePurposeBasedontherequirementsofproductionprocess,Inthelayoutandcircuitboarddesignprocess,Thereisastandardtofollow,Toachievehighefficiencyintheproductionofassemb
2、ly,Easyassembly,lowcost,andhighqualitytarget.Thecontentisonlyapplicabletotherelateddatabase,someareforreferenceonly.contentPCBlayoutrulesTextmarkingforsilkscreenlayerPCBFiducialMarkdesignPCBfixedpositionholeSMTcomponentPADdesignPTHcomponentPADdesignThrough-hole(Via)design
3、TracedesignotherlimitationPCBlayoutrulesV-Cutlayoutrule:ChipstoV-Cutlineshouldbemorethan1mm,otherwisewilldamagechipsorwillchangetouseStampCutdesign,willaddthePCBcostThedistancetoPCBedge0.5mm,cannotlayoutthetrace,ThedistancetoPCBedge1.0mm,cannotlayouttheanycomponentThedist
4、ancetoPCBedge5mm,cannotlayoutthecomponentsheightover25mm,otherwisecuterwilldamagecomponents≥1mmChipsChips≥1mmV-CUT25mm5cmmDe-panelCuterPCBV-CUTPCBPCBlayoutrulesV-Cutlayoutrules:PCBtracetoV-CutshouldbemorethenS=0.5mmsafetybuffer,otherwisewillhavetherisktodamagethetrace.Whe
5、nweuseV-CutPCBthickness1.0mmto3mm(1.0mmto0.5mm+SMTpallet)PCBoutlineissquaretypeorrectangletype,irregularshapecannotusetheV-CutSTHStampCutirregularshapePCBlayoutrulesStampdesign:StampdesignonlyforirregularPCB,PCBtoPCBlayoutdistanceis2mm,V-Cutonly0.3mmStampdesignparametersS
6、tampCutStampCut1.5mm2.0mm5.0mm2.8mm0.4mmNPTHhole1.0mmPCBPCB1.5mm2.0mm5.0mm0.4mmNPTHhole1.0mmconveyoredgePCBPCBlayoutrulesV-CutVSStamplayout:PCStoPCSdistanceonly0.3mmforV-Cut,wecansavethePCBlayoutcostStampCutdesign,PCBPCStoPCSdistanceis2mmBaseonsamePCSdesignwithdifferentCu
7、ttype(stamp/V–Cut),thePCBcostwillimpact10-25%V-CutPCBwillbecutbymachine,butStampCutwillbrokenbyOPandhavestressthendamagethecomponentsV-CutmachinePCB/panellayoutWhydon’tchoosesinglePCBforSMTprocess:WeneedtoputtheeachsinglePCBoncarrierwhendoSMTprocessButcarriercaveandsingle
8、PCBhavetolerance,soalwayshappensolderpasteprintingmisalignmentthenwillgettheshift/tombstoneproce
