SMT qhov kev tso kawm ua tiav, los ntawm tus nqi hu ua lifeline ntawm qhov chaw ua haujlwm cog, qee lub tuam txhab yuav tsum ncav cuag 95% los ntawm tus nqi yog mus txog tus qauv kab, yog li los ntawm tus nqi siab thiab qis, qhia txog lub zog ntawm kev tso kawm cog, txheej txheem zoo. , los ntawm tus nqi tuaj yeem txhim kho lub tuam txhab muaj peev xwm ua tau zoo, txo cov nqi tsim khoom, Z yog qhov tseem ceeb kom muaj peev xwm xa khoom ruaj khov, txhim kho cov neeg siv khoom txaus siab.
Txhais ntawm qhov ncaj-dhau tus nqi
Tus nqi ncav cuag tus qauv shipping ntawm ib zaug.
Ncaj-dhau tus nqi (First Pass Yield, FPY) tshwj xeeb txhais tau tias: tus naj npawb ntawm cov khoom zoo uas tau dhau tag nrho cov kev ntsuam xyuas thawj zaug cov txheej txheem muab tso rau hauv 100 pawg PCBs hauv cov kab ntau lawm.Yog li ntawd, tom qab cov kab ntau lawm rework los yog kho kom dhau cov khoom xeem, tsis yog ib feem ntawm qhov ncaj-los ntawm kev xam tus nqi.
Yam dab tsi cuam tshuam rau tus nqi ncaj nraim
1. cov ntaub ntawv (nrog rau ntau yam khoom siv hluav taws xob hauv lub sijhawm ntxov, suav nrog PCB boards)
2. muab tshuaj txhuam
3. qhov zoo thiab kev xav ntawm cov neeg ua haujlwm
Yuav ua li cas optimize thiab txhim kho tus nqi ncaj nraim
Ncaj-dhau tus nqi yog cuam tshuam nrog cov txiaj ntsig thiab kev ua neej nyob ntawm kev lag luam, yog li txhua lub tuam txhab nti tau tuav qhov kev ua kom zoo thiab txhim kho tus nqi ncaj nraim, 100% yeej tsis tuaj yeem ncav cuag, tab sis kuj vam tias yuav muaj ntau dua 98%.
Yog li, koj tuaj yeem txhim kho tus nqi ncaj qha los ntawm qee qhov txuas hauv qab no.
1. Ua kom zoo rau pcb board stencil tsim
Ntau tshaj 70% ntawm cov vuam zoo nyob rau hauv cov txheej txheem solder paste luam ntawv, uas yog SMT kev lag luam summed li cov ntaub ntawv kev, solder paste luam ntawv yog smt Z pem hauv ntej txheej txheem, solder paste offset, rub tawm, vau, nyob rau hauv ntau rooj plaub yog lub stencil tsim tsis xws luag, stencil tej zaum yuav loj heev / me me qhib, stencil qhov phab ntsa ntxhib, thiab lwm yam yuav ua rau cov saum toj no-hais tsis zoo, uas ua rau pcb pads ntawm paste yog phem, ua rau vuam tsis zoo, yog li cuam tshuam rau txoj kev ncaj-dhau. tus nqi.
2. Xaiv qhov zoo ntawm solder paste
Solder paste yog sib xyaw ntawm ntau hom hlau thiab fluxes, zoo ib yam li cov tshuaj txhuam hniav, solder paste yog muab faib ua 5, 3 thiab lwm yam sib txawv ntawm cov khoom siv sib txawv, cov khoom sib txawv yuav tsum xaiv cov xim sib txawv rau kev luam ntawv.
Cov ncauj lus kom ntxaws txog solder paste
SMT nti ua nyob rau hauv uas hom ntawm solder paste, cia thiab siv cov kev nkag siab yooj yim ntawm ib puag ncig
3. Kho covSMT tshuab luam ntawvsqueegee angle, siab
Lub tshuab luam ntawv scraper siab, lub kaum sab xis yuav cuam tshuam rau cov yam ntxwv ntawm cov tshuaj txhuam hniav, lub siab loj, nws yuav ua rau cov tshuaj txhuam tsis zoo, thiab lwm yam, lub kaum sab xis Z zoo yog 45-60 degrees.
4. Reflow qhov cubkub nkhaus
Raws li cov khoom sib txawv, kho lub sij hawm preheating, reflow kub nkhaus, siv lub cub tawg kub tester, ze rau qhov tseeb kub ntawm ntau lawm, thiab ces tau lub cub tawg kub nkhaus, thiab ces kho lub cub tawg kub nkhaus, kom lub cub tawg kub. nkhaus nyob rau hauv txoj kab nrog solder muab tshuaj txhuam thiab cov khoom soldering yuav tsum.
Post lub sij hawm: Feb-17-2022