Muaj ntau txoj cai tsim PCB. Hauv qab no yog ib qho piv txwv ntawm kev nyab xeeb hluav taws xob. Kev teeb tsa hluav taws xob yog qhov tsim hluav taws xob hauv hluav taws xob hauv cov xov hluav taws xob yuav tsum ua raws li cov cai, suav nrog kev nyab xeeb nyob deb, qhib Circuit Court, luv Circuit Court teeb. Kev teeb tsa ntawm cov kev txwv no yuav cuam tshuam rau tus nqi tsim khoom, tsim teeb meem thiab tsim qhov tseeb ntawm PCB tsim, thiab yuav tsum tau kho kom nruj.
1. Cov Cai Lij Choj
PCB tsim muaj tib lub network sib nrug, sib txawv network kev nyab xeeb qhov sib txawv, lwm yam, kab dav yuav tsum tau teeb tsa, lub neej ntawd kab dav thiab qhov sib txawv yog 6mil, qhov sib nrug deb yog 6mil, qhov tsawg kawg kab dav yog teem rau 6mil, tus nqi pom zoo ( lub defaultwiring dav) yog teem rau 10mil, qhov siab tshaj plaws yog teem rau 200mil. Cov chaw tshwj xeeb raws li qhov nyuaj ntawm lub rooj tsav xwm thaiv kev teeb tsa.
Lub teeb kab dav thiab qhov sib txawv kuj yuav tsum tau sib tham nrog PCB cov chaw tsim khoom ua ntej, vim qee cov tuam ntxhab yuav tsis tuaj yeem ua tiav cov kab dav thiab qhov sib txawv vim qhov teeb meem ntawm cov txheej txheem muaj peev xwm, thiab qhov me me ntawm kab dav thiab qhov sib txawv, tus nqi siab dua.
2.Line spacing 3W txoj cai
Txhua yam yog tsim los ntawm kab moos, kab sib txawv, yees duab, suab, rov pib dua kab thiab lwm cov kab tseem ceeb. Thaum ntau lub teeb liab ceev ceev nyob ntawm qhov deb, txhawm rau txo cov kev sib tham ntawm cov kab, cov kab sib nrug yuav tsum loj txaus. Thaum cov kab nruab nrab tsis pub tsawg tshaj 3 npaug ntawm kab dav, feem ntau cov hluav taws xob tsis tuaj yeem cuam tshuam rau ib leeg, uas yog txoj cai 3W. Txoj cai 3W khaws 70% ntawm thaj chaw los ntawm kev cuam tshuam rau ib leeg, thiab nrog 10W qhov sib txawv, 98% ntawm cov teb tuaj yeem ua tiav yam tsis muaj kev cuam tshuam rau ib leeg.
3.20H txoj cai rau lub hwj chim txheej
Txoj cai 20H yog hais txog 20H nrug ntawm cov txheej txheem hluav taws xob thiab tsim, uas yog qhov tseeb los cuam tshuam cov ntug hluav taws xob. Vim tias qhov hluav taws xob hluav taws xob nruab nrab ntawm cov txheej txheem hluav taws xob thiab hauv av hloov pauv, electromagnetic cuam tshuam yuav tawg tawm sab nraud ntawm ntug ntawm lub phaj, uas yog hu ua ntug nyhuv. Txoj kev daws teeb meem yog kom txo qis cov txheej txheem hluav taws xob kom cov hluav taws xob hluav taws xob tsuas yog kis tau los ntawm thaj tsam hauv av. Nrog ib H (qhov tuab ntawm qhov nruab nrab ntawm qhov nruab nrab ntawm lub zog thiab hauv av) raws li chav tsev, 70% ntawm cov hluav taws xob hluav taws xob tuaj yeem raug kaw rau ntawm ntug av nrog kev cog lus ntawm 20H, thiab 98% ntawm cov hluav taws xob tuaj yeem yuav tsum confined nrog ib tug contraction ntawm 100H.
4.Influence ntawm impedance kab sib nrug
Ib tug complex qauv ntawm impedance tswj uas muaj ob tug sib txawv teeb liab kab. Cov teeb liab tawm tswv yim ntawm tus tsav tsheb kawg yog ob lub teeb liab waveforms ntawm opposite polarity, feem kis los ntawm ob txoj kab sib txawv, thiab ob lub teeb liab sib txawv ntawm lub receiver kawg yog rho tawm. Txoj kev no yog tsuas yog siv nyob rau hauv high-speed digital analog circuits kom zoo dua teeb liab kev ncaj ncees thiab suab nrov. Lub impedance yog proportional rau qhov sib txawv kab sib nrug, thiab ntau dua qhov sib txawv kab sib txawv, qhov ntau dua qhov impedance.
5.Electrical creepage nrug
Hluav taws xob clearance thiab creepage nrug yog qhov tseem ceeb tshaj nyob rau hauv PCB tsim ntawm high voltage switching fais fab mov. Yog hais tias qhov hluav taws xob clearance thiab creepage deb tsawg dhau lawm, nws yog ib qho tsim nyog yuav tau xyuam xim rau qhov to. Creepage spacing thiab hluav taws xob sib txawv Thaum lub sij hawm tsim PCB, qhov hluav taws xob sib txawv tuaj yeem hloov kho los ntawm kev teeb tsa los kho qhov sib nrug ntawm lub ncoo mus rau hauv ncoo. Thaum PCB qhov chaw nruj, qhov sib txawv ntawm qhov sib txawv tuaj yeem nce los ntawm grooving.
