Lub rooj tsavxwm hauv lub luam ntawv, lossis PCB, yog qhov tseem ceeb ntawm cov khoom siv hluav taws xob. Ib qho PCB yog ib qho substrate (feem ntau yog ua los ntawm iav epoxy) nrog cov khoom siv hluav taws xob ua ke los ntawm cov ntawv txheeb tooj liab. Cov kev siv tooj hlau no pab khiav cov hluav taws xob. Cov khoom hauv koos pis tis tau ua raws li txoj kev tawm hauv tsev no kom tswj tau qhov khiav thiab ntau ntawm cov hluav taws xob uas xav tau.
Lub Rooj Tsawb Daim Ntawv Cuam Tshuam (Printed Circuit Board) kuj hu ua Cov Ntawv Teev Tseg (PWB). Thaum tag nrho cov tshuab hluav taws xob hauv cov tshuab PCB, nws yog hu ua Printed Circuit Assembly los yog PCA thiab qee lub sij hawm PCBA (Cov Rooj Sab Laj Hauv Cov Tsav Xwm).
Cov ntawv cog lus Circuit Court Board (PCB) rau Cov Kev Mounting (SMT)
Cov ntawv cog lus Circuit Board (PCB) rau Cov Khoom Siv Mount Surface Technology (SMT) yuav tsum raug xaiv los ua tib zoo saib xyuas xws li CTE (Coefficient of Thermal Expansion), nqi, dielectric zog thiab Tg.
Thaum tsim teeb tsa mounting board (PCB), xaiv cov substrate yog txiav txim los ntawm hom SMD cov khoom siv. Hauv Electronics Electronics los yog PCB sibtham, thaum cov hlau leadless ceramic nti khoom (LCCC) raug ntsia ntawm cov ntawv cog lus Circuit Court ua tawm ntawm iav epoxy substrates, cov yas dhos pob txha txhaws feem ntau pom muaj li 100 kab. Qhov ua rau kom muaj kev nyuab siab ntau yog CTE qhov sib txawv ntawm lub pob zeb thiab cov iav epoxy substrate. 
Muaj peb txoj kev sib txawv mus rau kev sib tshos sib txuas nrog ob leeg:
Siv lub substrate nrog CTE ib yam nkaus;
Siv qhov txheej txheem txheej sab nrauv kawg substrate; thiab
Hloov cov cav hlau tsis muaj ntxhua nrog cov hlau lead.
Qhov feem ntau siv cov substrate rau SMT luam tawm Circuit Boards, yog iav epoxy. Nws tsis muaj teeb meem ntawm CTE compatibility thaum siv rau cov nplaim pob yas ntsa pob. Txawm li cas los xij, Qhov no muab kev daws teeb meem rau cov ntawv siv lag luam xwb.
Feem ntau siv cov substrate rau PCBs rau cov ntawv thov kev ua tub rog yog ib qho nrog CTE tus nqi tshaj qhov ntawm cov pob zeb tej pob khoom siv tau teev tseg. Txhua qhov PCB substrate xaiv tau nws cov kev zoo thiab qhov tsis zoo. Cov neeg tsim khoom tsim nyog yuav tsum ua tib zoo ntsuas cov kev txwv nrog kev cia siab thiab kev xav tau. Tsis tas li ntawd, lub qhov ncauj qhov ntswg thiab ntawm qhov ntau ntau yuav tsum xaiv kom zoo.
Tshooj thiab daim duab ntawm hauv internet, yog tias muaj kev cuam tshuam dab tsi hu peb mus rho tawm.
NeoDen muab tag nrho cov smt kev sib txuas daws teeb meem, xws li SMT reflow qhov cub, yoj tes laug tshuab, de laim qhov chaw luam ntawv, PCB loader, PCB unloader, nti mounter, SMT AOI tshuab, SMT SPI tshuab, SMT X-hluav taws xob tshuab, SMT los ua ke kab khoom siv, PCB Cov Khoom Pab Khoom Siv Nruab Nruag SMT tej yam zoo li txhua yam SMT cov cav koj xav tau, thov hu rau peb kom paub ntxiv:
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