PCB yog ib yam ntawm cov khoom siv hluav taws xob, kuj yog tus nqa khoom ntawm tag nrho PCBA, lwm yam khoom siv hluav taws xob tau teeb tsa rau ntawm PCB ncoo, ua si lawv cov kev sib txuas lus hauv hluav taws xob.
Patch yuav tsum siv PCB.PCB hauv kev tsim tawm ntawm qhov dav dav yog lub tshuab nqus tsev ntim khoom, hauv qhovxaiv thiab tso tshuabthaj ua ntej xav tau pcb ci?
Yeej ci rau tom ntej vuam yuav zoo dua.
Nws yuav siv sij hawm ntev npaum li cas los ci PCB?
Yuav tsum tau muab faib raws li PCB lub sijhawm cia.
Rau PCB uas tau khaws cia rau 1-2 lub hlis, ci li 1 teev feem ntau yog txaus.
Cia ntawm PCB tsawg dua 6 lub hlis, kev ci ci li 2 teev tuaj yeem ua tau.
Cia ntau tshaj 6 lub hlis, 12 lub hlis hauv qab pcb, dav dav ci li 4 teev.
Ntau tshaj 12 lub hlis khaws cia, feem ntau pom zoo kom tsis txhob siv.
Dab tsi yog qhov tsim nyog ci kub?
Ci kub nyob rau hauv lub hauv paus ntsiab lus ntawm 120 ℃, vim hais tias lub hom phiaj ntawm ci yog kom tshem tawm cov dej noo, tsuav yog ntau tshaj qhov kub ntawm evaporation ntawm dej vapor, feem ntau 105 ℃ mus rau 110 ℃ yuav ua tau.
Vim li cas ci, tsis muaj ci yuav ua rau muaj kev pheej hmoo?
Vim li cas PCB ci, yog kom tshem tawm cov av noo thiab av noo.Vim hais tias PCB yog ib lub rooj sib tham ntau txheej laminated ua ke, khaws cia rau hauv ib puag ncig ntuj yuav muaj dej vapor ntau, dej vapor yuav txuas rau saum npoo ntawm pcb lossis drilling rau sab hauv.
Yog tias tsis ci, dej vapor hauv lubreflow qhov cubsoldering sai sai sov, dej vapor mus txog 100 ℃, nws yuav ua tau ntau thrust, yog hais tias tsis raws sij hawm tshem tawm, tej zaum pcb yuav tawg los yog puas rau lub internal circuitry, ua rau ib tug luv luv Circuit Court los yog tom qab siv cov txheej txheem ntawm intermittent phem teeb meem.
Yuav ua li cas PCB ci yuav tsum stacked?
Feem ntau nyias thiab loj loj pcb tsis pom zoo kom muab tso rau ntsug, vim hais tias nws yog ib qho yooj yim nyob rau hauv lub ci tshav kub expansion thiab ces txias txias shrinkage, uas ua rau micro-deformation.
Cov laug cam me me raug pom zoo los ua pawg, tab sis nws yog qhov zoo tshaj kom tsis txhob ntim ntau dhau, kom tsis txhob pcb ci hauv dej vapor tsis yooj yim rau evaporate.
Cov lus ceeb toom ntawm PCB ci
Tom qab ci PCB, nyob rau hauv qhov kev npaj txias yuav tsum tau muab tso rau thaum lub luj ntawm lub siab kom tsis txhob micro-deformation.
pcb qhov cub yuav tsum tau teeb tsa nyob rau hauv lub tso pa tawm kom tsis txhob evaporation ntawm noo noo los ntawm qhov cub tsis tuaj yeem tawm.
Post lub sij hawm: Aug-11-2023