PCB kev lag luam raw khoom suav nrog iav fiber ntau xov tooj, ntawv tooj liab, tooj liab clad board, epoxy resin, number case, ntoo pulp, thiab lwm yam. Cov tooj liab tooj liab tau ua los ntawm cov ntawv ci tooj liab, epoxy cob, iav iav xov paj thiab lwm yam ntaub ntawv raw. Hauv PCB cov nqi khiav lag luam, cov khoom siv raw li tus lej feem ntau, kwv yees li 60-70%.

PCB kev lag luam saw los ntawm sab saum toj mus rau hauv qab yog “cov khoom siv raw – txheej txheej – daim ntawv thov PCB”. Cov ntaub ntawv ntws los suav nrog cov ntawv tooj liab, cov tshuaj txhuam, cov iav iav, cov ntoo ntoo, kua mem, pob tooj liab, thiab lwm yam. Cov khoom siv hauv nruab nrab feem ntau yog hais txog tooj liab clad phaj, tuaj yeem muab faib ua txhav tooj liab txhav phaj thiab hloov tau tooj liab clad phaj, uas tawv tooj liab clad phaj tuaj yeem muab faib ntxiv rau hauv ntawv raws li tooj liab clad phaj, cov khoom siv sib xyaw raws tooj liab clad phaj thiab iav daim ntaub raws tooj liab clad phaj raws li cov khoom siv ntxiv; Cov nqes hav yog daim ntawv thov txhua yam ntawm PCB, thiab cov saw hlau tsim los ntawm sab saum toj mus rau hauv qab kev lag luam qib siab txo qis ua ntu zus.

Schematic daim duab ntawm PCB kev lag luam saw

Dej ntws: Cov ntawv ci tooj liab yog cov khoom tseem ceeb tshaj plaws rau kev tsim cov phaj tooj liab, suav txog kwv yees li 30% (phaj tuab) thiab 50% (phaj nyias) ntawm tus nqi ntawm cov phaj tooj liab.Tus nqi ntawm cov ntawv ci tooj liab nyob ntawm tus nqi pauv tooj liab, uas cuam tshuam loj heev los ntawm tus nqi tooj liab thoob ntiaj teb. Cov ntawv ci tooj liab yog cov khoom siv hluav taws xob cathodic, ua rau txheej txheej txheej ntawm lub rooj tsav xwm txheej, ua cov khoom siv hluav taws xob hauv PCB, nws ua lub luag haujlwm ua thiab ua kom txias. Daim ntaub fiberglass tseem yog ib qho ntawm cov ntaub ntawv raw rau tooj liab-clad panels. Nws yog xaws los ntawm cov iav fiber ntau xov thiab suav txog 40% (phaj tuab) thiab 25% (phaj nyias) ntawm tus nqi ntawm tooj liab-clad panels. Fiberglass daim ntaub hauv PCB kev tsim khoom raws li cov cuab yeej txhawb nqa lub luag haujlwm hauv kev ua kom muaj zog thiab rwb thaiv tsev, hauv txhua yam ntawm daim ntaub fiberglass, cov khoom siv hluavtaws hauv PCB kev tsim khoom feem ntau yog siv los ua cov nplaum rau lo rau daim ntaub fiberglass ua ke.

Cov ntawv ci tooj liab ntau lawm kev lag luam siab yog qhov siab, kev lag luam ua lub zog sib tham. Cov ntawv ci tooj liab electrolytic feem ntau yog siv PCB ntau lawm, txheej txheem thev naus laus zis ntawm electrolytic tooj liab ntawv ci, ua nruj me ntsis, peev txheej thiab thev naus laus zis teeb meem, tau suav ua ke kev lag luam qib siab ntau dua, thoob ntiaj teb kev tsim tooj liab ntawv ci saum kaum lub tuam txhab nyob hauv 73%, kev lag luam tooj liab cov ntawv sib zog muaj zog dua, cov khoom siv raw ntawm cov nqi tooj liab kom txav mus. Tus nqi ntawm cov ntawv ci tooj liab cuam tshuam rau tus nqi ntawm tooj liab clad phaj, thiab tom qab ntawd ua rau tus nqi hloov pauv ntawm Circuit Court board nqes.

Iav fiber index hnub qub nce kev sib

Cov dej nruab nrab ntawm kev lag luam: Cov phaj tooj liab yog cov khoom siv tseem ceeb ntawm PCB kev tsim khoom. Cov tooj liab tau ua kev cai raus dej cov khoom siv ntxiv nrog cov organic sib txuas, ib sab lossis ob sab npog nrog cov ntawv tooj liab, ntawm qhov kub nias thiab dhau los ua ib hom phaj cov khoom, rau (PCB), ua kom zoo, rwb thaiv tsev, txhawb peb lub zog loj, tshwj xeeb laminated board yog ib yam tshwj xeeb hauv PCB tsim khoom, tooj liab npog 20% ​​~ 40% ntawm tus nqi ntawm tag nrho cov PCB ntau lawm, ntawm tag nrho cov khoom siv hauv PCB suav txog qhov siab tshaj, Fiberglass npuag substrate yog hom phaj tooj liab ntau tshaj plaws, ua los ntawm cov ntaub fiberglass ua cov khoom siv ntxiv thiab epoxy cob ua cov ntawv nplaum.

Kev lag luam nqes hav: qhov kev loj hlob ntawm cov ntawv thov ib txwm muaj qeeb zuj zus, thaum cov ntawv thov tshiab yuav dhau los ua cov ntsiab lus kev loj hlob. Kev loj hlob ntawm cov ntawv thov ib txwm muaj hauv PCB hauv nqes dej tau qeeb zuj zus, thaum siv cov ntawv thov tshiab, nrog kev txhim kho txuas ntxiv ntawm kev siv hluav taws xob hauv tsheb, kev tsim kho loj ntawm 4G thiab kev txhim kho yav tom ntej ntawm 5G tsav kev tsim kho kev sib txuas lus hauv paus cov khoom siv, tsheb PCB thiab kev sib txuas lus PCB yuav dhau los ua cov ntsiab lus loj hlob yav tom ntej.