Cov txheej txheem luam ntawv ntawm SMT thaj ua: cov qhov engraved ntawm SMT thaj stencil yuav tsum paub tseeb raws li hom ntawm seem, kev ua haujlwm thiab tuab ntawm cov substrate, thiab qhov loj thiab cov duab ntawm lub qhov. Nws qhov kom zoo dua yog qhov nrawm nrawm thiab siab ua haujlwm.
SMT thaj ua cov txheej txheem ntawm cov kua nplaum ua kom faib tawm: kev faib tawm yog siv cua compressed los ntawm kev tshaj tawm lub taub hau kom faib cov kua nplaum liab rau ntawm txheej. Qhov loj thiab cov xov tooj ntawm lub ntsiab lus tseem ceeb yog tswj hwm los ntawm lub sijhawm, lub raj ntsuas lub taub thiab lwm yam tsis pub dhau. Cov kua nplaum ua lub tshuab hluav taws xob muaj cov haujlwm ua haujlwm yooj yim. Rau qhov sib txawv, nws tuaj yeem siv cov kua nplaum sib txawv taub hau thiab teeb tsa cov tsis hloov, thiab nws tseem tuaj yeem hloov cov duab thiab cov lej ntawm cov kua nplaum ua kom tiav cov nyhuv. Nws muaj qhov zoo ntawm yooj yim, yooj thiab ruaj khov. Qhov tsis zoo yog tias nws nquag kos duab thiab ua npuas. Peb tuaj yeem hloov kho cov haujlwm tsis ua haujlwm, nrawm, sijhawm, huab cua thiab qhov ntsuas kub kom txo tau cov kev tsis zoo no.
Txoj kev siv rab koob-ntxig ntawm cov txheej txheem ua kom huv yog kom nqus cov yeeb yam zoo li rab koob rau hauv cov roj hmab phaj ntiav. Txhua rab koob muaj kev sib koom ua ke. Thaum cov kua nplaum teev tau chwv lub nruas, nws cais tawm ntawm rab koob. Tus nqi ntawm kua nplaum tuaj yeem sib txawv raws li cov duab thiab qhov ntawm lub koob. Kev kho kub kom txias: 100 ° C, 120 ° C, 150 ° C, lub sijhawm kho: 5 feeb, 150 vib nas this, 60 vib nas this. Raug mob kho. Nco tseg:
1. Qhov siab dua qhov ua kom zoo ntawm cov txheej txheem thaj ua rau lub zog ua kom ntev, qhov ua kom lub sijhawm ua kom zoo dua thiab ua kom lub zog sib zog.
2. Vim tias qhov kub thiab txias ntawm PCB nplaum yuav hloov nrog qhov loj thiab qhov chaw ntawm lub tsev sib dhos, nws yog qhov zoo tshaj kom pom qhov tsim nyog ua kom tawv tawv. Cov kua nplaum liab: khaws cia hauv chav sov rau 7 hnub, khw hauv qab 5 ° C rau ntau dua 6 hli, khaws cia ntawm 5-25 ° C.
Qhov loj thiab ntim ntawm thaj ua ke siv nyob rau hauv SMT thaj ua cov khoom muaj ntau me dua li cov tsoos ntsaws, thiab feem ntau tuaj yeem txo los ntawm 60% -70% lossis 90%. Qhov hnyav yog txo los ntawm 60% -90%. Qhov no tuaj yeem ua kom tau raws li cov kev xav tau loj zuj zus ntxiv rau miniaturization ntawm cov khoom siv hluav taws xob. Kev ua cov txheej txheem ntawm SMT thaj ua rau thaj yog feem ntau ua rau tsis pub dhau lossis luv ua luv, uas txo cov khoom faib ntawm Circuit Court, thiaj li txo cov xov tooj cua kom cuam tshuam.