ESD yog dab tsi?
Hluav taws xob hluav taws xob yog ib lub hom phiaj uas tshwm sim nyob rau hauv ntau txoj hauv kev, xws li kev sib cuag, kev sib txhuam, thiab lwm yam. Cov tshuab hluav taws xob tiv thaiv hluav taws xob, xws li kev lag luam hluav taws xob, kev lag luam roj av, kev lag luam riam phom, kev lag luam textile, kev lag luam roj hmab, thiab cov teeb meem electrostatic ntawm Xinghang thiab cov tub rog teb, nrhiav kev txo cov kev poob los ntawm hluav taws xob zoo li qub.
Los tiv thaiv hluav taws xob tuaj yeem muab faib ua kom tsis txhob muaj hluav taws xob zoo li qub thiab tiv thaiv hluav taws xob tsis zoo.
Kev tiv thaiv kev tiv thaiv electrostatic yog kev siv lub tshuab hluav taws xob ntev. Txhua qhov yuam kev lossis tsis ua haujlwm hauv txhua qhov txuas yuav ua rau qhov tsis ua haujlwm ntawm kev tiv thaiv kev ua haujlwm zoo li qub.
Cov kev ntsuas tseem ceeb rau kev tiv thaiv electrostatic thaum ntau lawm yog electrostatic to, dissipation, neutralization, humidification, shielding thiab av.
Tib neeg lub cev electrostatic tiv thaiv kev tiv thaiv tsuas yog muaj kev tiv thaiv zoo li qub dab teg, hlua caj dab, dav dav, khau thiab thom khwm, kaus mom, hnab looj tes lossis tes ntiv tes. Nws muaj cov haujlwm xws li xaim hluav taws xob xaim, kev tiv thaiv nruab nrab thiab kev tiv thaiv.
ESD zoo li cas?
Electrostatic paug (ESD) yog txhais tias kev tso tawm (hluav taws xob ntws) ntawm lub txim (hluav taws xob tsis txaus lossis ntau dhau) uas tau siv hluav taws xob (tsau). Tus nqi them yog qhov ruaj khov nyob rau hauv ob qho:
1. Thaum nws "cuab ntxiab" mus rau hauv kev coj ua tab sis cov khoom siv hluav taws xob, xws li lub hau ntswj hlau nrog lub hau yas.
2. Thaum nws tawm ntawm qhov chaw pov hwm (xws li yas), nws ntws tsis tuaj rau nws.
Txawm li cas los xij, yog tias tus kav hlau hluav taws xob (hluav taws xob ntsia hlau) nrog lub siab txaus them tau muab tso ze rau qhov sib txuas ua ke (IC) nrog cov muaj peev xwm rov qab, qhov nqi "hnab looj tes zoo li qub"
"", ua rau electrostatic paug (ESD).
ESD tshwm sim sai heev nrog kev siv ntau heev, thiab feem ntau ua kom muaj cua sov txaus kom yaj sab hauv lub voj voos ntawm cov hluav taws xob sab nruab nrab, thiab lub mos txwv me me tshuab tawm sab nraud hauv qab ntawm lub tshuab hluav taws xob ua rau puas tam sim thiab puas tsuaj. Dua li qhov hnyav, tsuas yog ib ntawm kaum qhov kev phom sij zoo li tsis zoo yog li tag nrho cov kev tivthaiv uas tau sim thaum ua tiav. Lwm qhov 90% ntawm tus neeg mob, ESD kev puas tsuaj tsuas yog ua rau muaj kev tiv thaiv ib nrab - lub ntsiab lus tias cov khoom tsis zoo tuaj yeem xeem dhau qhov kev kuaj zaum kawg yam tsis muaj daim ntawv ceeb toom, thiab tsuas yog ua ntej qhov kev ua tsis tau tshwm sim tom qab xa khoom mus rau cov qhua tuaj noj mov. Qhov tshwm sim yog qhov teeb meem loj tshaj plaws rau qhov chaw uas cov chaw tsim khoom siv kho kom raug rau txhua qhov kev ua tsis zoo.
Txawm li cas los xij, qhov nyuaj tshaj plaws hauv kev tswj hwm ESD yog qhov nws tsis pom, tab sis nws tuaj yeem ncav cuag kev puas tsuaj ntawm cov khoom siv hluav taws xob. Qhov paug uas ua rau lub "nyem" lub suab yuav tsum tau them tus nqi hnyav kwv yees li 2000 volts, thaum lub 3000 volt tuaj yeem hnov hluav taws xob me me, thiab 5000 volt tuaj yeem pom lub txim taws.
Piv txwv li, cov khoom siv sib txuam xws li cov khoom siv sib xyaw ua ke hlau oxide semiconductor (CMOS) lossis hluav taws xob nyeem tau los tsuas yog nco (EPROM) tuaj yeem sib cais los ntawm ESD muaj peev xwm sib txawv ntawm tsuas yog 250 volts thiab 100 volts, feem. Kev rhuav tshem, thiab ntau dua thiab cov khoom siv niaj hnub sib txawv, suav nrog kev ua haujlwm ntawm Pentium, tuaj yeem raug rhuav tshem kom ntev li 5 volts.
Cov teeb meem no tau suav nrog los ntawm cov haujlwm txhua hnub uas ua rau puas tsuaj. Piv txwv li, taug kev hla cov yas ntoo, tsim kom muaj kev sib txhuam ntawm cov npoo av thiab khau. Qhov tshwm sim yog cov khoom siv hluav taws xob ntshiab uas sau cov nqi ntawm 3 txog 2000 volts, nyob ntawm tus txheeb ze cua ntawm cov huab cua hauv zos.
Txawm tias qhov kev sib txhuam los ntawm lub ntuj txav ntawm cov neeg ua haujlwm nyob rau theem yuav ua tau 400 ~ 6000 volts. Yog tias tus neeg ua haujlwm tau muab cov tshuaj pov thawj thaum lub sijhawm tsis zoo lossis ntim ntawm PCB hauv lub thawv txau lossis lub hnab npuas, lub sijhawm them nuj nqis rau sab nraud ntawm tus neeg ua haujlwm lub cev tuaj yeem kwv yees li 26,000 volts.
Yog li, yog qhov tseem ceeb ntawm ESD cov kev phom sij, txhua tus neeg ua haujlwm nkag mus rau thaj chaw tiv thaiv electrostatically tiv thaiv (EPA) yuav tsum muaj av thaiv kom tsis txhob muaj nqi tsim thiab txhua qhov chaw yuav tsum tau ua kom muaj kev tiv thaiv txhua yam ntawm tib lub peev xwm, tiv thaiv ESD tshwm sim.