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1、第6章PCB设计基础Inthispaper,byGSGTWLGcontributionPowerpointdocumentsmaybeapoorexperienceattheWAPend・ItisrecommendedthatyouchooseTXT,ordownloadthesourcefiletothenativeview.Chapter6PCBdesignfoundationforPCBdesignLearningobjective:MasterthebasicoperationofthePCBeditormanagement
2、window.?Masterpicturemanagementoperation.?MastercomponentplacementtoolbarandPCBeditorsareusedforeditingfunction.6.1PCBoverviewoverviewPrintedcircuitboardisbasedontheinsulatingsubstratematerialprocessingandbecomeacertainsizeoftheboard,inwhichtheatleastoneconductivegraph
3、icsandalldesigngoodholehole(suchascomponents,mechanicalmountingholesandholemetallization,etc・)，soastorealizetheelectricalcomponentsbetweeneachother・Toprovidenecessarymechanicalsupportforvariouscomponentsinthecircuit・Provideelectricalcormectiontothecircuit・Themarkingsym
4、bolshallbemarkedonthepaneltofacilitatetheinsertion,inspectionanddebugging・？6.1.1thekindsofPCB?AccordingtothedivisionofsubstratematerialsusedforthePCBsubstratematerialsusedRigidPCBaccordingto(1)therigidprintedcircuitboard)referstotherigidmaterialPCB,commonrigidprintedci
5、rcuitboardbymeansofrigidmaterials,PCBaregenerallyrigid,suchascomputer,homeapplianceintheprintingofinterfacecardaregenerallyrigid,tendtoberigidSuchasthecomputerboard,plate,etc・CommonrigidPCBisasfollows.Asfollows.Plate,etc・Commonrigidityisthefollowingsheet・Lowprice,poorp
6、erformance,paperboard・Lowpriceandpoorperformance,generallyusedforlowfrequencycircuitandlowdemand・Andnotdemanding・Theglassclothlaminatedboard・Thepriceismoreexpensive,theperformanceisbetter,theglassclothboard・Thepriceismoreexpensive,theperformanceisbetter,oftenusedintheh
7、ighfrequencycircuitandthehigh-gradehomeapplianceproduct・Andhigh-endappliances・Syntheticfiberboard・Thepriceismoreexpensive,theperformanceisbetter,syntheticfiberboard・Thepriceismoreexpensive,theperformanceisbetter,oftenusedinthehighfrequencyelectricalapplianceproduct・Roa
8、dandhigh-endappliances・Whenthefrequencyishigherthanthehundredsofmegabytes,whenthefrequencyishigherthanthehundredsofme
