SMT yog dab tsi?
SMT, lub npe luv rau Surface Mount Technology, yog cov txheej txheem sib dhos tseem ceeb siv hauv kev tsim khoom ntawm PCBA (Printed Circuit Board Assembly). Nws yog hais txog cov cuab yeej ntawm kev sib txuas thiab kev sib txuas ntawm qhov chaw- cov khoom siv (SMDs) ncaj qha mus rau saum npoo ntawm lub rooj tsav xwm luam tawm (PCB), tsis yog ntxig cov pins los ntawm qhov hauv lub rooj tsavxwm, uas tau dhau los ua txoj hauv kev sib dhos tseem ceeb hauv kev tsim hluav taws xob niaj hnub no.
Cov txheej txheem SMT feem ntau muaj plaub cov kauj ruam tseem ceeb: solder paste printing, tivthaiv tso, reflow soldering, thiab tshuaj xyuas. Ua ntej, solder paste yog precisely luam mus rau PCB pads los ntawm ib tug stencil los muab qhov nruab nrab rau soldering. Tom qab ntawd, siab -ceev lossis siab- cov tshuab muab qhov tseeb tuaj tos SMDs (xws li resistors, capacitors, thiab ICs) los ntawm feeders thiab muab lawv tso rau ntawm cov ntaub ntawv sib xws. Tom ntej no, PCB raug xa mus los ntawm lub qhov cub reflow, qhov twg cov tshuaj nplaum nplaum melts ntawm qhov kub thiab txias thiab solidifies tom qab txias, tsim txhim khu kev qha solder pob qij txha ntawm cov khoom thiab PCB.
Piv nrog rau cov tsoos dhau los ntawm -Hole Technology (DIP), SMT muaj cov txiaj ntsig zoo: nws ua kom cov khoom siv hluav taws xob me me los ntawm kev siv SMDs me me, txhim kho kev sib dhos ua haujlwm nrog cov cuab yeej siv tshuab, txo cov nqi tsim khoom, thiab txhim kho kev ntseeg siab ntawm PCBA. Nws yog tshwj xeeb tshaj yog haum rau siab - ntom, me me - cov khoom siv hluav taws xob loj.
SMT tau siv dav hauv ntau yam kev lag luam uas cuam tshuam nrog PCBA, suav nrog cov khoom siv hluav taws xob, khoom siv hluav taws xob tsheb, khoom siv kho mob, kev tswj hwm kev lag luam, thiab cov khoom siv sib txuas lus. Raws li cov thev naus laus zis ntawm PCBA sib dhos, SMT ncaj qha cuam tshuam rau kev tsim khoom, kev ua tau zoo, thiab qib miniaturization ntawm cov khoom siv hluav taws xob, ua lub luag haujlwm tsis tuaj yeem hloov pauv hauv kev tsim hluav taws xob tsim kev lag luam.
