1. Rework rework hauv paus: rework rework tsis muaj cov ntaub ntawv tsim thiab cov kev cai, tsis tau pom zoo raws li cov kev cai, tsis muaj kev mob siab rau rework rework txheej txheem.
2. Tus naj npawb ntawm rework tso cai rau txhua qhov sib koom ua ke: kev ua haujlwm rov ua dua yog tso cai rau cov pob qij txha tsis zoo, thiab tus naj npawb ntawm rework rau txhua qhov sib koom ua ke yuav tsum tsis pub tshaj peb zaug, txwv tsis pub cov khoom seem yuav puas.
3. Kev siv cov khoom tshem tawm: tshem tawm cov khoom hauv cov ntsiab lus yuav tsum tsis txhob siv dua, yog tias koj xav tau siv, yuav tsum ua raws li cov khoom siv hluav taws xob qub ntawm cov khoom thiab cov txheej txheem kev soj ntsuam kev ua tau zoo, ua tau raws li qhov yuav tsum tau ua ua ntej tso cai rau kev teeb tsa.
4. Tus naj npawb ntawm desoldering ntawm txhua lub ncoo: txhua daim ntawv luam tawm yuav tsum tsuas yog ua haujlwm desoldering (uas yog, tsuas yog tso cai rau ib qho kev hloov ntawm cov khoom), qhov tsim nyog solder joint intermetallic compound (IMC) thickness ntawm 1.5 mus rau 3.5µm, lub thickness yuav loj tuaj. Tom qab remelting, txawm tias mus txog 50µm, qhov sib koom ua ke ua nkig, qhov vuam lub zog poob qis, muaj kev ntseeg siab txaus ntshai nyob rau hauv kev co;thiab remelting IMC yuav tsum tau kub dua, txwv tsis pub nws yog tsis muaj peev xwm tshem tawm IMC.Cov txheej tooj liab ntawm qhov tawm ntawm qhov los ntawm lub qhov yog qhov thinnest, thiab lub ncoo yog nquag tawg ntawm no tom qab remelting;Nrog lub thermal expansion ntawm Z-axis, tooj liab txheej deforms, thiab lub ncoo detaches vim qhov kev cuam tshuam ntawm cov hlau lead-tin solder sib koom.Cov ntaub ntawv tsis muaj txhuas yuav rub tag nrho cov ncoo: PCB vim iav fiber ntau thiab epoxy resin nrog dej vapor, tom qab cua sov delamination: ntau qhov vuam, lub ncoo yooj yim rau buckle, thiab cov substrate sib cais.
5. Nto mount thiab mixed installation PCBA los ua ke tom qab vuam bowing thiab distortion yuav tsum: nto mount thiab mixed installation PCBA los ua ke tom qab vuam bowing thiab distortion ntawm tsawg tshaj li 0.75% ntawm cov yuav tsum tau
6. Tag nrho tus naj npawb ntawm PCB sib dhos kho: tag nrho cov kev kho ntawm PCB lub rooj sib txoos yog txwv rau rau rau, kev ua haujlwm ntau dhau thiab kev hloov kho cuam tshuam rau kev ntseeg tau.
Post lub sij hawm: Sep-23-2022