Solder paste Hauv kev luam ntawv, cov viscosity qis cov kua nplaum kuj tseem tuaj yeem ua rau luam tsis raug. Qhov viscosity yuav tsum yog qhov nruab nrab, qhov kub ua haujlwm ntawm lub tshuab luam ntawv siab dua lossis lub nrawm nrawm yog qhov siab, uas tuaj yeem txo qhov viscosity ntawm cov tshuaj txhuam hniav siv. Yog tias muab tshuaj txhuam ntau dhau los tso rau hauv, nws yuav ua rau luam tsis raug thiab txuas rau hauv PCB cov txheej txheem ua. Rau qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom siab tshaj plaws, yog tias daim nyias nyias hla ntu ntu ua rau muaj kev puas tsuaj ntawm cov pins, nws yuav ua rau muab tshuaj txhuam tso rau nruab nrab ntawm cov pins thiab ua rau luam tsis raug. Cov ntawv xov xwm hluav taws xob luam tawm nrog cov ntawv luam tsis raug ntawm lub tshuab luam ntawv muab tshuaj txhuam yuav tsum tshem tawm cov ntawv luam tsis raug.
Siv lub tshuab raj me me kom tshem cov tshuaj muab tshuaj txhuam los ntawm daim ntawv luam tsis raug PCB yuav ua rau muaj teeb meem. Nws yog feem ntau ua tau kom raus cov ntawv tsis raug hauv qhov hnyav sib xws, xws li dej nrog qee qhov ntxiv, thiab tom qab ntawd siv txhuam txhuam kom tshem cov hlaws me me ntawm lub rooj tsavxwm. Kuv yuav xum tsau thiab txhuam ntau zaus ntau dua li txhuam txhuam qhuav lossis txhuam. Tom qab cov ntawv muab tshuaj txhuam luam tawm, tus neeg teb xov tooj tos ntev los ntxuav cov ntawv tsis raug, qhov nyuaj dua nws yog kom tshem cov kab laug sab laug. Cov laug cam tsis raug yuav tsum tau muab tso rau hauv qhov hnyav so sai li sai tau tom qab pom qhov teeb meem, vim tias cov tshuaj muab tshuaj txhuam tau yooj yim tshem tawm ua ntej nws qhuav.
Muab ob sab tso rau hauv Circuit Board Board Kub
Tsis txhob so nrog daim ntaub los txhawm rau tiv thaiv cov kab laug sab thiab lwm yam kab mob los ntawm smearing rau ntawm lub rooj tsavxwm. Tom qab so, nplawm nrog tshuaj tsuag maj mam tuaj yeem pab tshem tawm cov ntawv tsis xav tau. Nws kuj tseem pom zoo kom siv cua kub kom qhuav. Yog tias siv lub tshuab ntxhua khaub ncaws stencil kab rov tav, sab uas yuav tsum tau ntxuav yuav tsum tig ntsej muag tso cai rau cov tshuaj txhuam kom yaj tawm ntawm lub rooj tsavxwm.
Raws li ib txwm muaj, ua tib zoo saib xyuas qee qhov ntsiab lus tuaj yeem tshem tawm qhov xwm txheej tsis zoo, xws li sau tsis raug ntawm cov tshuaj muab tshuaj txhuam tsis zoo thiab tshem tawm cov tshuaj txhuam kom zoo los ntawm pawg thawj coj saib. Nws yog peb lub hom phiaj txhawm rau tso tus nqi tsim nyog ntawm cov tshuaj txhuam ntawm qhov chaw xav tau. Cov cuab yeej qias neeg, muab tshuaj txhuam qhuav qhuav qhuav, thiab ua tsis raug ntawm tus qauv nrog PCB pawg thawj coj tuaj yeem ua rau cov tshuaj tsis zoo rau hauv qab ntawm tus qauv lossis txawm tias sib dhos. Thaum lub sijhawm luam ntawv, tus qauv raug so raws li qee txoj cai ntawm kev mus luam ntawv. Ua kom ntseeg tau tias tus qauv nyob ntawm lub ncoo, tsis yog ntawm daim npog qhov ncauj, kom ntseeg tau tias cov txheej txheem muab tshuaj ntxuav kom huv hauv PCB. Hauv online, tshuaj xyuas lub sijhawm tiag tiag tshuaj xyuas thiab tshuaj xyuas ua ntej rov ua dua tom qab kev tso cov khoom sib xyaw yog txhua cov txheej txheem txheej txheem uas pab txo cov txheej txheem tsis xws luag ua ntej yuav siv qhov muag.
Rau cov txheej txheem zoo, yog tias daim ntawv nyias nyias ntu ntu ntu khoov ua rau muaj kev puas tsuaj ntawm cov pins, nws yuav ua rau cov kua nplaum tso rau ntawm cov pins, ua rau luam tsis raug thiab/lossis luv luv. Qhov qis-viscosity solder paste kuj tseem tuaj yeem ua rau luam tsis raug. Piv txwv li, qhov kub ua haujlwm siab ntawm lub tshuab luam ntawv lossis lub nrawm nrawm nrawm tuaj yeem txo qhov viscosity ntawm cov tshuaj txhuam hniav siv, thiab ua rau luam ntawv tsis xws luag thiab txuas ntxiv vim qhov tso ntau dhau ntawm cov tshuaj muab tshuaj txhuam.
Feem ntau, tsis muaj kev tswj hwm cov khoom tsim nyog, cov txheej txheem muab tshuaj txhuam thiab cov cuab yeej siv ua lub hauv paus tseem ceeb ntawm qhov tsis xws luag hauv cov txheej txheem rov ua dua tshiab.