Kev paub pib ntawm muag muag PCB pawg thawj coj saib

Nrog kev nce ntxiv ntawm qhov sib piv ntawm cov PCB muag muag thiab daim ntawv thov thiab txhawb nqa PCB yooj ywm, nws muaj ntau ntxiv los ntxiv PCB, txhav lossis txhav hloov pauv thaum hais PCB, thiab hais tias muaj pes tsawg txheej. Feem ntau, PCB ua los ntawm cov khoom siv rwb thaiv tsev hu ua mos PCB lossis hloov pauv PCB, txhav yooj ywm PCB. Nws ADAPTS rau cov khoom siv hluav taws xob tam sim no mus rau qhov ntom ntom ntom ntom ntom ntom thiab muaj kev ntseeg siab, kev ua haujlwm me me, kev xav tau kev txhim kho kom yooj yim, tab sis kuj ua tau raws li cov kev cai nruj nruj thiab kev ua lag luam thiab kev sib tw xav tau.

Txawv teb chaws, muag PCB tau siv dav nyob rau xyoo 1960s. Hauv peb lub tebchaws, kev tsim khoom thiab thov pib xyoo 1960. Nyob rau xyoo tsis ntev los no, nrog kev lag luam thoob ntiaj teb thiab qhib lub nroog, thiab qhia txog thev naus laus zis los txhawb nws txoj kev siv yog tas li zuj zus, qee qhov me me thiab nruab nrab txhav txhav PCB lub Hoobkas tsom mus rau qhov muag nyuaj ua thev naus laus zis ntawm lub sijhawm no, cuab yeej thiab txheej txheem los ua siv cov cuab yeej uas twb muaj lawm txhim kho, hloov pauv thiab hloov pauv tau yooj yim muag muag PCB PCB ntau lawm kev siv kev xav tau loj hlob. Txhawm rau nkag siab PCB, cov txheej txheem PCB muag muag tau qhia ntawm no.

I. Kev faib tawm ntawm PCB mos thiab nws qhov zoo thiab qhov tsis zoo

1. Kev faib tawm PCB muag

Mos PCBS feem ntau yog cais raws li txheej thiab txheej txheem ntawm tus neeg xyuas pib raws li hauv qab no:

1.1 Ib leeg ib sab muag PCB

Ib leeg-sab muag PCBS, nrog tsuas yog ib txheej ntawm tus neeg xyuas pib, tej zaum yuav muaj lossis tsis muaj txheej rau saum npoo. Cov khoom siv rwb thaiv tsev siv sib txawv nrog daim ntawv thov khoom. Feem ntau siv cov khoom siv rwb thaiv tsev muaj polyester, polyimide, polytetrafluoroethylene, ntaub epoxy-iav mos.

Ib leeg-sab muag PCB tuaj yeem muab faib ua plaub pawg hauv qab no:

1) Ib leeg-sab kev sib txuas yam tsis muaj txheej txheej

Cov qauv hlau ntawm hom PCB mos yog nyob rau ntawm ib txheej txheej thaiv, thiab cov xaim hlau tsis npog. Zoo ib yam li ib leeg ib sab nruj PCB. Cov khoom no yog cov uas pheej yig tshaj thiab feem ntau yog siv hauv qhov tsis tseem ceeb, siv tau zoo ib puag ncig. Qhov kev sib txuas sib txuas tau pom los ntawm tin vuam, fusion vuam lossis vuam siab. Nws tau siv ntau hauv xov tooj thaum ntxov.

2) ib leeg-sab txuas nrog npog txheej

Piv nrog rau cov chav kawm yav dhau los, tus neeg ua haujlwm zoo no tsuas muaj ib txheej txheej ntxiv rau saum npoo raws li tus neeg siv khoom xav tau. Thaum npog, lub ncoo yuav tsum raug nthuav tawm, tsuas yog tsis npog hauv qhov kawg. Cov kev xav tau ntawm qhov tseeb tuaj yeem siv rau hauv daim ntawv tshem tawm qhov. Nws yog ib qho uas tau siv dav tshaj plaws ib sab muag PCB, uas yog siv dav hauv tsheb ntsuas thiab ntsuas hluav taws xob.

3) Tsis muaj kev sib txuas ob tog ntawm txheej txheej

Hom kev sib txuas phaj sib txuas no tuaj yeem txuas rau ntawm ob sab pem hauv ntej thiab tom qab ntawm cov xaim. Txhawm rau ua qhov no, ib txoj hauv kev tau ua hauv cov insulating substrate ntawm lub ncoo. Txoj hauv kev no tuaj yeem ua los ntawm xuas nrig ntaus, kos los yog lwm yam kev siv tshuab txhais tau tias ntawm txoj haujlwm xav tau ntawm cov rwb thaiv tsev. Nws yog siv rau ob sab sib txuas cov ntsiab lus, cov cuab yeej thiab cov ntawv thov xav tau tin vuam. Cov ntaub ntawv nkag mus rau thaj chaw tsis muaj cov rwb thaiv tsev ib puag ncig thiab thaj chaw zoo li no feem ntau yog siv tshuaj tua kab mob.

4) Ob tog sib txuas nrog npog txheej

Qhov sib txawv ntawm chav kawm no thiab chav kawm yav dhau los yog tias muaj txheej txheej npog saum npoo av. Tab sis cov cladding tau nkag mus rau qhov uas tseem tso cai rau nws raug txiav tawm ntawm ob sab thaum tseem tswj hwm cov ntaub thaiv. Cov PCBS muag muag no yog ua los ntawm ob txheej ntawm cov khoom siv rwb thaiv tsev thiab cov hlau ua haujlwm. Nws tau siv qhov twg txheej txheej yuav tsum tau ua kom raug rwb thaiv tsev los ntawm cov cuab yeej ib puag ncig, thiab yuav tsum tau rwb thaiv tsev los ntawm ib leeg, nrog rau ob sab pem hauv ntej thiab sab tom qab txuas nrog.

1.2 Ob tog ob sab muag PCB

Ob-sided saj zawg zog PCB nrog ob txheej conductors. Cov ntawv thov thiab qhov zoo ntawm hom ob-sided saj zawg zog PCB no zoo ib yam li ntawm ib leeg-sided saj zawg zog PCB, nrog lub ntsiab kom zoo dua yog nce cov xov hluav taws xob ntom ntom ib cheeb tsam. Nws tuaj yeem muab faib ua: tsis muaj lub qhov hlau thiab tsis muaj txheej txheej raws li qhov muaj thiab tsis muaj lub qhov hlau ua; B tsis muaj lub qhov hlau thiab npog; C muaj cov qhov hlau thiab tsis muaj txheej txheej; D muaj cov hlau qhov thiab npog txheej. Ob tog ob sab muag PCBS yam tsis muaj kev sib tshooj tsis tshua muaj neeg siv.