Environmental tej yam kev mob rau cia ntawm nto los ua ke Cheebtsam:
1. Ambient kub: cia kub <40 ℃
2. Ntau qhov chaw kub <30 ℃
3. Ambient humidity: <RH60%
4. Ib puag ncig huab cua: tsis muaj cov pa phem xws li sulfur, chlorine thiab acid uas cuam tshuam rau kev ua haujlwm vuam raug tso cai nyob rau hauv qhov chaw cia thiab ua haujlwm.
5. Antistatic ntsuas: ua tau raws li cov kev cai antistatic ntawm SMT Cheebtsam.
6. Lub sij hawm cia ntawm cov khoom: lub sij hawm cia yuav tsum tsis pub tshaj 2 xyoos txij li hnub tsim khoom ntawm cov khoom tsim khoom;Lub sijhawm khoom xa tuaj ntawm cov neeg siv khoom siv tshuab tom qab kev yuav khoom feem ntau tsis pub dhau 1 xyoos;Yog tias lub Hoobkas nyob hauv qhov chaw ntub dej, SMT cov khoom yuav tsum tau siv nyob rau hauv 3 lub hlis tom qab kev yuav khoom, thiab kev ntsuas dej kom tsim nyog yuav tsum tau coj mus rau hauv qhov chaw cia thiab ntim cov khoom.
7. SMD cov khoom siv nrog cov dej noo tsis kam.Nws yuav tsum tau siv nyob rau hauv 72 teev tom qab qhib thiab tsis pub ntev tshaj ib lub lim tiam.Yog tias nws siv tsis tau, nws yuav tsum tau muab cia rau hauv lub thawv DRYING RH20%, thiab cov khoom siv SMD uas tau ntub dej yuav tsum tau qhuav thiab dehumidified raws li cov kev cai.
8. Lub SMD (SOP, Sj, lCC thiab QFP, thiab lwm yam) ntim rau hauv lub raj yas tsis yog kub resistant thiab tsis tuaj yeem ncaj qha ci hauv qhov cub.Nws yuav tsum tau muab tso rau hauv lub raj hlau lossis hlau phaj kom ci.
9. QFP ntim yas phaj tsis kub thiab kub tsis kam ob.Kev kub siab resistant (cuam tshuam Tmax = 135 ℃, 150 ℃ lossis MAX180 ℃, thiab lwm yam) tuaj yeem muab tso ncaj qha rau hauv qhov cub rau ci;Tsis kub siab tsis tuaj yeem ncaj qha rau hauv qhov cub ci, thaum muaj xwm txheej, yuav tsum tau muab tso rau hauv lub phaj hlau rau ci.Kev puas tsuaj rau cov pins yuav tsum tau tiv thaiv thaum lub sij hawm tig, thiaj li tsis mus ua kom puas lawv coplanar zog.
Tsheb thauj mus los, sorting, soj ntsuam los yog phau ntawv mounting:
Yog tias koj xav tau cov cuab yeej SMD, hnav ESD lub dab teg pluaj thiab siv tus cwj mem nqus kom tsis txhob ua rau cov pins ntawm SOP thiab QFP cov cuab yeej tiv thaiv tus pin warping thiab deformation.
Qhov seem SMD tuaj yeem txuag tau raws li hauv qab no:
Nruab nrog tshwj xeeb tsis tshua muaj kub thiab tsis muaj av noo cia lub thawv.Khaws cov SMD uas tsis siv ib ntus tom qab qhib lossis ua ke nrog cov khoom noj hauv lub thawv.Tab sis nruab nrog loj tshwj xeeb tsis tshua muaj kub thiab tsis tshua muaj av noo cia tank nqi ntau dua.
Siv cov hnab ntim khoom qub qub.Ntev npaum li lub hnab tsis zoo thiab lub tshuab desiccant nyob rau hauv qhov zoo (tag nrho cov voj voog dub ntawm daim ntawv qhia cov av noo yog xiav, tsis muaj paj yeeb), SMD tsis siv, tseem tuaj yeem muab tso rau hauv lub hnab thiab kaw nrog daim kab xev.
Post lub sij hawm: Sep-14-2021