4-1. Rau hom SMD
SMD hom LED khoom yog sib npaug rau MSL4, tshwj tsis yog tias tau teev tseg. Yog tias SMD hom khoom nqus dej noo, cov dej noo tuaj yeem nthuav dav vim cua sov thaum lub sij hawm rov qab, thiab lwm yam, ua rau delamination ntawm qhov sib cuam tshuam hauv pob, uas yuav ua rau tsis ua hauj lwm.
Qhov taw qhia silica gel thiab daim npav qhia muaj nyob rau hauv lub hnab ntim dej noo yuav hloov xim ntawm xiav mus rau xim liab thaum nws nqus dej noo.
Yog tias lub hnab ntim dej tsis tau qhib, khaws cov khoom hauv ib puag ncig ntawm 30 ° C lossis tsawg dua thiab 60% cov av noo lossis tsawg dua, nrog lub sijhawm cia siab tshaj plaws ntawm 12 lub hlis.
Tom qab qhib lub hnab ntim dej noo, cov LEDs yuav tsum tau muab tso rau hauv 72 teev hauv ib puag ncig ntawm 30 ° C lossis tsawg dua thiab 50% av noo lossis tsawg dua.
Yog tias muaj cov LEDs uas tsis tau siv, muab tso rau hauv ib lub hnab uas tsis muaj dej noo ua ke nrog silica gel thiab muab tso rau hauv lub thawv kaw.
Thov nco ntsoov tias 72 teev tsis suav nrog lub sijhawm cov LEDs khaws cia hauv lub hnab airtight nrog silica gel tom qab qhib lub hnab.Tom qab lub sijhawm khaws cia tau tas sijhawm, ci cov khoom ib zaug. Yog tias qhov ntsuas tau hloov xim liab nyob rau lub sijhawm cia, kev kho ci yuav tsum tau ua tsis pub ntau tshaj ib zaug.
Rau cov txheej txheem ci, peb pom zoo kom tshem tawm cov cuab yeej los ntawm daim kab xev embossed thiab ci hauv qhov cub ntawm 100 ° C rau 24 teev.
4-2. Rau lub qhov taub hom LED
Rau cov hom LEDs los ntawm qhov, khaws cia ntawm qhov kub ntawm 30 ° C lossis tsawg dua thiab cov av noo ntawm 70% RH lossis tsawg dua, thiab khaws cia rau hauv tib qhov chaw mus txog ib xyoos.
LEDs yuav tsum tau muab cia rau hauv ib qho chaw uas lawv raug corrosive gases, thiab lwm yam, uas tej zaum yuav ua rau deterioration ntawm cov leads.
