PCB, tseem hu ua "printed circuit board", tau maj mam dhau los ua ib qho tseem ceeb hauv ntau yam kev lag luam, txawm tias nws yog kev sib txuas lus, khoos phis tawj, lossis cov twj paj nruag, tag nrho cov uas tsis tuaj yeem sib cais los ntawm daim ntawv thov ntawm cov ntawv luam tawm Circuit Board. Yog li hauv cov ntawv luam tawm hauv Circuit Court boards, feem ntau xim yog undoubtedly ntsuab, tab sis koj puas paub vim li cas cov ntawv luam tawm Circuit Board yuav tsum tau kho nrog ntsuab?
Thaum pib ntawm lub xyoo pua 20th, asbestos fibers tau dav siv los ua grooves thiab qhov rau cov khoom siv hluav taws xob. Txawm li cas los xij, nrog rau lub sijhawm dhau mus, asbestos fiber maj mam nthuav tawm nws qhov teeb meem thiab dhau los ua cov khoom muaj teeb meem tshwm sim. Nws cov carcinogenicity thiab lwm yam teeb meem kev noj qab haus huv tau nyiam tib neeg txoj kev xav. Yog li ntawd, nyob rau lub sijhawm no, tib neeg pib tshawb nrhiav cov khoom tsis zoo uas tuaj yeem hloov pauv asbestos.
Lub sijhawm no, cov ntaub ntawv fiberglass tau tshwm sim. Cov khoom siv fiberglass yog siv dav hauv cov ntawv luam tawm, tab sis nws cov qauv yog xoob dhau lawm thiab yuav tsum tau txheej txheej los tiv thaiv nws los ntawm kev rhuav tshem thaum polishing. Nyob rau ntawm lub sijhawm no, thawj txheej xim yog xim dub, tab sis cov xim dub yog yooj yim heev rau tev tawm thaum lub sij hawm tsim khoom, thiab nws cov optical reflectivity tsis zoo txaus. Qhov no yog ib qho teeb meem loj vim hais tias qhov kev xav tau txiav txim siab qhov ua tau zoo ntawm lub rooj tsav xwm hauv Circuit Court, yog li cov tuam ntxhab tau tuaj nrog "kev ua kom zoo tshaj" ntawm lub sijhawm no.
Nrog rau kev tshawb fawb tob zuj zus, cov khoom siv npog ntsej muag semi-solid tau tsim. Cov khoom siv txheej no tuaj yeem tiv taus qhov kub thiab txias thiab txawm tias nitration tsis hnav, thiab cov nplaim tuaj yeem coated nrog cov xim tshwj xeeb los pab kho kom zoo nkauj ntxiv. Muaj xim hu ua ntsuab, uas dhau sij hawm tau dhau los ua xim kos npe rau PCB nto kho.
Lwm txoj hauv kev ntxiv rau kev kho cov txheej txheem ntawm PCB board li ntsuab yog txhawm rau txhawm rau tag nrho PCB board ntsuab. Tsis zoo li cov ntaub ntawv npog ntsej muag dub, tag nrho cov PCB board zoo li lub pob, uas tuaj yeem tiv thaiv lub rooj tsav xwm zoo dua thiab tiv thaiv cov khoom siv sab nraud los ntawm kev cuam tshuam loj rau nws txoj haujlwm. Txoj kev ua no muaj ntau dua thaum tsim cov kab hluav taws xob zoo dua.
Tom qab tag nrho cov txheej txheem tsim khoom, cov ntawv luam tawm ntsuab ntsuab tuaj yeem siv los ua ntau yam khoom siv hluav taws xob thiab cov tsev siab. Cov Circuit Court boards yog me ntsis kim dua dub Circuit Court boards, tab sis lawv ua tau zoo dua nyob rau hauv cov nqe lus ntawm reflectivity thiab durability, yog li ntawd manufacturers txaus siab los siv no ntsuab luam ntawv Circuit Court board.
Nyob rau hauv luv luv, cov xim ntsuab nyob rau saum npoo ntawm PCB boards tsis yog tsuas yog xim rau "kev zoo nkauj", tab sis kuj muaj nws tus kheej tshwj xeeb tsim technology tswvyim thiab kev loj hlob txheej txheem tom qab nws. Cov txheej ntsuab tuaj yeem tiv thaiv cov kab hluav taws xob zoo ntawm PCB pawg thawj coj saib. Nws tsis yog yooj yim npaum li cov xim saum npoo, uas txhais tau hais tias muaj ntau yam haujlwm thiab qhov zoo. Txawm li cas los xij, tsis hais seb cov xim ntawm lub rooj tsav xwm Circuit Court yog ntsuab los yog tsis, kev siv lub rooj tsav xwm luam ntawv muaj kev nyab xeeb yog qhov tseem ceeb, vim tias lub rooj tsav xwm tsis zoo tuaj yeem ua rau muaj kev puas tsuaj loj thiab poob.