Lub ntsiab zoo ntawm SMT li cov txheej txheem dhau los ntawm qhov-hole yog:
Cov khoom me me. Raws li ntawm 2017 tsawg tshaj plaws tivthaiv yog metric 0201 ntsuas 0.25mm × 0.125mm
Ntau dua kev tiv thaiv ceev (Cheebtsam ib cheeb tsam twg) thiab ntau yam kev sib txuas ntxiv ntawm ib qho khoom.
Cheebtsam tuaj yeem muab tso rau ob sab ntawm lub Rooj Tswjhwm Saib Circuit Court.
Ntau dua kev sib txuas ntawm qhov sib txuas vim qhov qhib qhov chaw tsis thaiv qhov chaw nyob sab hauv, los yog sab nraud povtseg yog cov khoom ntim ntawm ib sab ntawm PCB.
Cov teeb meem me me hauv qhov kev tso tawm yuav raug kho raws li qhov nro ntawm qhov nrawm ntawm molten solder rub tawm rau hauv cov ntawv sib dhos nrog cov txee sib tshuav. (Ntawm qhov tod tes, dhau ntawm lub qhov tsis tuaj yeem ua rau me ntsis misaligned, vim hais tias ib zaug tus ua yog los ntawm lub qhov, cov cheebtsam muaj kev siab zoo thiab tsis tuaj yeem txav tawm ntawm kev sib txhaub.)
Zoo dua txhua yam kev ua tau zoo nyob rau hauv kev poob siab thiab kev mob kev nkeeg (ib nrab vim qis hnyav, thiab qeeb vim tsis muaj kev ywj pheej)
Txwv tsis kam thiab inductance ntawm kev twb kev txuas; thiaj li, tsawg dua pliaj RF teeb liab qhov teebmeem thiab muaj kev paub zoo dua thiab muaj kev paub ntau ntxiv.
Zoo dua EMC kev ua tau zoo (txo cov hluav taws xob tawg) vim yog lub voj voog me me (vim yog lub pob me) thiab qhov qis txhuas tsawg dua.
Tsawg dua qhov yuav tsum tau muab pov tseg. (Drilling PCBs yog lub sij hawm-siv thiab kim.)
Txo cov nqi qis thiab lub sij hawm ntawm qhov chaw ua khoom loj, siv cov cuab yeej khoom siv.
Yooj yim thiab sai dua kev sib sau ua ke. Qee qhov chaw tso kawm ntawv muaj peev xwm muab tso ntau tshaj 136,000 khoom ib teev.
Muaj ntau qhov SMT nqi tsawg tshaj qhov sib npaug ntawm qhov sib nrug.
Ib qho chaw ntim rau pob zeb yog qhov chaw txaus nyiam qhov chaw uas tsis muaj qhov profile tsawg lossis qhov chaw muaj nyob rau ntawm lub pob yog tsawg. Raws li cov cuab yeej hluav taws xob ua kom yooj yim dua thiab muaj chaw seem, qhov xav tau ntawm qhov chaw ntim pob nce. Concurrently, raws li qhov cuab yeej yooj yim dua, lub tshav kub los ntawm kev lag luam nce. Yog hais tias lub tshav kub tsis raug tshem tawm, qhov kub ntawm qhov cuab yeej nce tau sai qhov ua hauj lwm lub neej. Nws yog vim li no thiaj li tsim nyog los tsim pob zeb ntim pob zeb kom muaj cov thermal conductivity.