Los ntawm cov txiaj ntsig ntawm cov khoom sib txawv, nws pom tau tias qhov ESD no yog ib qho kev ntsuam xyuas tseem ceeb heev: yog tias lub rooj tsav xwm tsis zoo tsim, thaum muaj hluav taws xob zoo li qub, nws yuav ua rau cov khoom sib tsoo lossis ua rau cov khoom puas.Yav dhau los, kuv tsuas pom tias ESD yuav ua rau cov khoom puas tsuaj, tab sis kuv tsis xav tias yuav tau them nyiaj txaus rau cov khoom siv hluav taws xob.
ESD yog qhov peb feem ntau hu ua Electro-Static tso tawm.Los ntawm kev paub txog kev paub, nws tuaj yeem paub tias hluav taws xob zoo li qub yog qhov tshwm sim ntawm ntuj tsim, uas feem ntau yog tsim los ntawm kev sib cuag, kev sib txhuam, induction ntawm cov khoom siv hluav taws xob, thiab lwm yam. Nws yog cov yam ntxwv ntawm cov khoom siv mus sij hawm ntev thiab qhov hluav taws xob siab (tuaj yeem tsim ntau txhiab volts. los yog txawm tias kaum tawm txhiab volts ntawm hluav taws xob zoo li qub)), tsis muaj zog, tsis tshua muaj tam sim no thiab lub sijhawm luv luv.Rau cov khoom siv hluav taws xob, yog tias ESD tsim tsis zoo, kev ua haujlwm ntawm cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob feem ntau tsis ruaj khov lossis puas.
Ob txoj hauv kev feem ntau yog siv thaum ua ESD paug kev kuaj: tiv tauj tawm thiab tawm cua.
Kev tiv thaiv tawm yog tso tawm ncaj qha rau cov cuab yeej hauv kev sim;pa tawm kuj hu ua indirect discharge, uas yog generated los ntawm coupling ntawm ib tug muaj zog magnetic teb rau nyob ib sab tam sim no loops.Qhov ntsuas hluav taws xob rau ob qhov kev ntsuas no feem ntau yog 2KV-8KV, thiab cov kev xav tau sib txawv hauv thaj tsam sib txawv.Yog li ntawd, ua ntej tsim, peb yuav tsum xub paub qhov kev lag luam rau cov khoom.
Ob qhov xwm txheej saum toj no yog cov kev sim yooj yim rau cov khoom siv hluav taws xob uas tsis tuaj yeem ua haujlwm vim tib neeg lub cev hluav taws xob lossis lwm yam laj thawj thaum tib neeg lub cev tau ntsib nrog cov khoom siv hluav taws xob.Daim duab hauv qab no qhia txog huab cua cov ntaub ntawv txheeb xyuas ntawm qee thaj chaw hauv ntau lub hlis ntawm lub xyoo.Nws tuaj yeem pom los ntawm daim duab uas Lasvegas muaj cov av noo tsawg tshaj plaws hauv lub xyoo.Cov khoom siv hluav taws xob hauv cheeb tsam no yuav tsum tau them nyiaj tshwj xeeb rau kev tiv thaiv ESD.
Cov av noo yog txawv nyob rau hauv ntau qhov chaw ntawm lub ntiaj teb no, tab sis tib lub sij hawm nyob rau hauv ib cheeb tsam, yog hais tias cov av noo tsis zoo tib yam, lub static hluav taws xob generated kuj txawv.Cov lus hauv qab no yog cov ntaub ntawv khaws tseg, los ntawm qhov uas nws tuaj yeem pom tau tias cov hluav taws xob zoo li qub tau nce ntxiv thaum huab cua noo tsawg.Qhov no kuj piav qhia tsis ncaj vim yog vim li cas qhov hluav taws xob zoo li qub tsim thaum tshem tawm lub tsho tiv no nyob rau sab qaum teb lub caij ntuj no loj heev.“
Vim tias hluav taws xob zoo li qub yog qhov phom sij loj, peb yuav tiv thaiv nws li cas?Thaum tsim kev tiv thaiv electrostatic, peb feem ntau muab faib ua peb kauj ruam: tiv thaiv cov nqi sab nraud los ntawm kev ntws mus rau hauv Circuit Court board thiab ua rau kev puas tsuaj;tiv thaiv sab nraud magnetic teb los ntawm kev puas tsuaj rau lub rooj tsav xwm Circuit Court;tiv thaiv kev puas tsuaj los ntawm electrostatic teb.
Hauv kev tsim hluav taws xob tiag tiag, peb yuav siv ib lossis ntau txoj hauv qab no rau kev tiv thaiv electrostatic:
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Avalanche diodes rau electrostatic tiv thaiv
Qhov no kuj yog ib txoj kev siv feem ntau hauv kev tsim.Ib txoj hauv kev zoo tshaj plaws yog txuas lub avalanche diode rau hauv av nyob rau hauv parallel ntawm kab teeb liab tseem ceeb.Txoj kev no yog siv lub avalanche diode los teb sai sai thiab muaj peev xwm ua kom ruaj khov clamping, uas tuaj yeem haus cov concentrated high voltage hauv lub sijhawm luv luv los tiv thaiv lub rooj tsavxwm.
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Siv high-voltage capacitor rau kev tiv thaiv Circuit Court
Nyob rau hauv txoj kev no, ceramic capacitors nrog ib tug withstand voltage ntawm tsawg kawg yog 1.5KV feem ntau yog muab tso rau hauv lub I / O connector los yog txoj hauj lwm ntawm lub teeb liab tseem ceeb, thiab cov kev twb kev txuas kab yog luv li sai tau nyob rau hauv thiaj li yuav txo qhov inductance ntawm kev twb kev txuas. kab.Yog tias siv lub capacitor nrog qhov tsis tshua muaj hluav taws xob, nws yuav ua rau lub capacitor puas thiab poob nws qhov kev tiv thaiv.
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Siv cov hlaws ferrite rau kev tiv thaiv Circuit Court
Ferrite hlaws tuaj yeem ua rau ESD tam sim no zoo heev, thiab tuaj yeem tiv thaiv hluav taws xob.Thaum ntsib ob qhov teeb meem, ferrite hlaws yog ib qho kev xaiv zoo heev.
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Spark gap method
Txoj kev no yog pom nyob rau hauv ib qho khoom siv.Txoj kev tshwj xeeb yog siv daim duab peb sab tooj liab nrog cov lus qhia ua ke nrog ib leeg ntawm microstrip kab txheej txheej ntawm tooj liab.Ib qho kawg ntawm daim duab peb sab tooj liab txuas nrog lub teeb liab kab, thiab lwm qhov yog daim duab peb sab tooj liab.Txuas rau hauv av.Thaum muaj hluav taws xob zoo li qub, nws yuav tsim tawm qhov ntse thiab siv hluav taws xob hluav taws xob.
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Siv cov txheej txheem lim LC los tiv thaiv Circuit Court
Cov lim uas tsim los ntawm LC tuaj yeem txo cov hluav taws xob zoo li qub los ntawm kev nkag mus rau hauv Circuit Court.Inductive reactance yam ntxwv ntawm inductor yog qhov zoo ntawm inhibiting siab zaus ESD los ntawm kev nkag mus rau hauv Circuit Court, thaum lub capacitor shunts lub siab zaus zog ntawm ESD rau hauv av.Nyob rau tib lub sijhawm, hom lim no kuj tuaj yeem ua rau lub npoo ntawm lub teeb liab thiab txo cov nyhuv RF, thiab qhov kev ua tau zoo tau raug txhim kho ntxiv nyob rau hauv cov nqe lus ntawm cov teeb liab kev ncaj ncees.
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Multilayer board rau ESD tiv thaiv
Thaum cov nyiaj tso cai, xaiv lub rooj tsav xwm ntau txheej kuj yog ib txoj hauv kev zoo los tiv thaiv ESD.Nyob rau hauv lub rooj tsavxwm ntau txheej, vim tias muaj lub dav hlau hauv av ua tiav nyob ze rau ntawm kab, qhov no tuaj yeem ua rau ob peb ESD mus rau lub dav hlau impedance qis dua, thiab tom qab ntawd tiv thaiv lub luag haujlwm ntawm cov cim tseem ceeb.
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Txoj kev tawm ntawm ib qho kev tiv thaiv band nyob rau hauv ib puag ncig ntawm Circuit Board tiv thaiv txoj cai
Txoj kev no feem ntau yog kos cov kab ib ncig ntawm lub rooj tsav xwm Circuit Court yam tsis muaj txheej txheej vuam.Thaum tej yam kev mob tso cai, txuas cov kab mus rau lub vaj tse.Nyob rau tib lub sijhawm, nws yuav tsum raug sau tseg tias cov kab tsis tuaj yeem tsim lub voj kaw, thiaj li tsis tsim lub voj voog kav hlau txais xov thiab ua rau muaj teeb meem ntau dua.
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Siv CMOS li lossis TTL cov khoom siv nrog clamping diodes rau kev tiv thaiv Circuit Court
Txoj kev no siv lub hauv paus ntsiab lus ntawm kev sib cais los tiv thaiv lub rooj tsav xwm Circuit Court.Vim tias cov khoom siv no tau tiv thaiv los ntawm clamping diodes, qhov nyuaj ntawm kev tsim yog txo nyob rau hauv qhov tseeb Circuit Court tsim.
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Siv cov decoupling capacitor
Cov decoupling capacitors yuav tsum muaj ESL thiab ESR qis.Rau tsawg-zaus ESD, lub decoupling capacitors txo lub voj cheeb tsam.Vim nws cov txiaj ntsig ntawm ESL, lub zog electrolyte tsis muaj zog, uas tuaj yeem lim tau lub zog ntau zaus..
Hauv luv luv, txawm hais tias ESD yog qhov txaus ntshai thiab tuaj yeem ua rau muaj qhov tshwm sim loj, tab sis tsuas yog los ntawm kev tiv thaiv lub zog thiab cov kab teeb liab ntawm lub voj voog tuaj yeem tiv thaiv ESD tam sim no los ntawm kev ntws mus rau hauv PCB.Ntawm lawv, kuv tus thawj coj feem ntau hais tias "qhov chaw zoo ntawm lub rooj tsavxwm yog huab tais".Kuv vam tias cov kab lus no tseem tuaj yeem coj koj los ntawm kev tawg lub skylight.