Peb yuav tsum ua li cas ua ntej SMT PCBs thaum lub sij hawm sib dhos PCB?

Peb yuav tsum ua li cas ua ntej SMT PCBs thaum lub sij hawm sib dhos PCB?

PCBFuture muaj smt assembling Hoobkas, uas tuaj yeem muab cov kev pabcuam SMT sib dhos rau cov khoom me me 0201.Nws yog txhawb ntau yam kev ua xws liTurnkey PCB sib dhosthiab pcba OEM kev pabcuam.Tam sim no, kuv yuav qhia rau koj Yuav ua li cas kev tshuaj xyuas yuav tsum ua ua ntej SMT PCB ua?

 1.Kev tshuaj xyuas ntawm SMT Cheebtsam

Cov khoom kuaj xyuas muaj xws li: solderability, pin coplanarity thiab usability, uas yuav tsum tau coj mus kuaj los ntawm lub chaw soj ntsuam.Txhawm rau kuaj cov khoom sib txuas, peb tuaj yeem siv cov hlau tsis muaj tweezers txhawm rau txhawm rau txhawm rau hauv lub lauj kaub ntawm 235 ± 5 ℃ lossis 230 ± 5 ℃, thiab tshem tawm ntawm 2 ± 0.2s lossis 3 ± 0.5s.Peb yuav tsum xyuas qhov xwm txheej ntawm vuam kawg hauv qab 20x microscope.Nws yuav tsum tau hais tias ntau tshaj 90% ntawm cov vuam kawg ntawm cov khoom yog wetted nrog tin.

Peb SMT txheej txheem Rhiav yuav ua hauv qab no apearance soj ntsuam:

1.1 Peb tuaj yeem tshawb xyuas qhov vuam xaus lossis tus pin qhov chaw ntawm cov khoom siv rau oxidation los yog paug paug pom lossis nrog lub iav magnifying.

1.2 Tus nqi nominal, specification, qauv, raug, thiab sab nraud qhov ntev ntawm cov khoom yuav tsum ua raws li cov kev cai ntawm PCB.

1.3 Cov pins ntawm SOT thiab SOIC tsis tuaj yeem deformed.Rau ntau cov khoom siv lead ua QFP nrog cov hlau lead pitch tsawg dua 0.65mm, coplanarity ntawm cov pins yuav tsum tsawg dua 0.1mm thiab peb tuaj yeem soj ntsuam los ntawm mounter optical tshuaj xyuas.

1.4 Rau PCBA uas xav tau kev tu rau SMT thaj ua haujlwm, cov cim ntawm cov khoom yuav tsum tsis txhob poob tom qab ntxuav, thiab tsis tuaj yeem cuam tshuam rau kev ua haujlwm thiab kev ntseeg siab ntawm cov khoom.Tias peb tuaj yeem pom kev tshuaj xyuas tom qab ntxuav.

2Kev soj ntsuam PCB

2.1 Lub PCB av qauv thiab qhov loj me, lub ntsej muag lub ntsej muag, lub ntsej muag lo lo ntxhuav, thiab ntawm qhov chaw teeb tsa yuav tsum ua kom tau raws li cov qauv tsim ntawm SMT luam tawm Circuit Board.Peb tuaj yeem tshawb xyuas qhov sib txawv ntawm lub ncoo yog qhov tsim nyog, lub vijtsam luam tawm ntawm lub ncoo, thiab lub vias yog ua rau ntawm lub ncoo, thiab lwm yam.

2.2 Qhov ntev ntawm PCB yuav tsum zoo ib yam, thiab qhov ntev, qhov chaw qhov, thiab cov cim qhia ntawm PCB yuav tsum ua kom tau raws li qhov yuav tsum tau ua ntawm cov khoom siv.

2.3 PCB tso cai khoov loj:

2.3.1 Upward / convex: siab tshaj 0.2mm / 50mm ntev thiab siab tshaj 0.5mm / qhov ntev ntawm tag nrho PCB.

2.3.2 Downward / concave: siab tshaj 0.2mm / 50mm ntev thiab siab tshaj 1.5mm / qhov ntev ntawm tag nrho PCB.

2.3.3 Peb yuav tsum xyuas seb PCB puas muaj kab mob los yog damp.

3Kev ceev faj rau SMT PCB txheej txheem:

3.1 Tus kws tshaj lij hnav lub nplhaib kuaj electrostatic.Ua ntej plug-in, peb yuav tsum xyuas cov khoom siv hluav taws xob ntawm txhua qhov kev txiav txim tsis muaj qhov yuam kev / sib xyaw, kev puas tsuaj, deformation, khawb, thiab lwm yam.

3.2 Plug-in board ntawm PCB yuav tsum tau npaj cov khoom siv hluav taws xob ua ntej, thiab nco ntsoov cov kev taw qhia ntawm lub capacitor polarity yuav tsum raug.

3.3 Tom qab SMT luam ntawv ua tiav, xyuas cov khoom puas xws li tsis muaj qhov ntxig ntxig, thim rov qab, thiab tsis zoo, thiab lwm yam, thiab muab cov tin tiav PCB rau hauv cov txheej txheem tom ntej.

3.4 Thov hnav lub nplhaib electrostatic ua ntej SMT PCB thaum txheej txheem PCB sib dhos.Cov ntawv hlau yuav tsum nyob ze rau ntawm daim tawv nqaij ntawm lub dab teg thiab ua kom zoo hauv av.Ua hauj lwm ua ke nrog ob txhais tes.

3.5 Cov khoom siv hlau xws li USB, IF socket, shielding cover, tuner thiab network chaw nres nkoj davhlau ya nyob twg yuav tsum hnav cov ntiv tes thaum ntsaws.

3.6 Txoj hauj lwm thiab kev taw qhia ntawm cov khoom yuav tsum raug.Cov khoom yuav tsum tiaj tus rau saum npoo ntawm lub rooj tsavxwm, thiab cov khoom siv siab yuav tsum tau muab tso rau ntawm K taw.

3.7 Yog tias cov khoom tsis sib haum nrog cov lus qhia ntawm SOP thiab BOM, nws yuav tsum raug ceeb toom rau tus saib xyuas lossis pawg thawj coj hauv lub sijhawm.

3.8 Cov khoom yuav tsum tau ua tib zoo saib xyuas.Tsis txhob txuas ntxiv siv PCB nrog cov khoom puas, thiab siv lead ua oscillator tsis tuaj yeem siv tom qab nws poob.

3.9 Thov kom huv si thiab ua kom huv si ua ntej ua haujlwm thiab tawm haujlwm.

3.10 nruj me ntsis raws li kev khiav hauj lwm cov cai ntawm lub chaw ua hauj lwm.PCB nyob rau hauv thawj qhov chaw soj ntsuam, yuav tsum-tseem ceeb cheeb tsam, cheeb tsam puas, thaj chaw tu, thiab cov khoom siv tsawg tsis pub rau qhov chaw random.

4Vim li cas thiaj xaiv PCBFuture rau koj cov kev pabcuam pcb sib dhos?

4.1Lub zog lav

4.1.1 Rhiav: Nws muaj cov khoom siv txawv teb chaws, uas tuaj yeem tsim tau 4 lab cov ntsiab lus hauv ib hnub.Txhua tus txheej txheem yog nruab nrog QC uas tuaj yeem khaws cov PCB zoo.

4.1.2 DIP cov kab ntau lawm: Muaj ob lub tshuab yoj soldering, thiab peb muaj ntau tshaj li kaum ob tus neeg ua haujlwm nrog ntau tshaj peb xyoos ntawm kev paub.Cov neeg ua haujlwm muaj kev txawj ntse thiab tuaj yeem txuas ntau yam khoom siv plug-in.

4.2Kev ruaj ntseg zoo, tus nqi zoo

4.2.1 Cov cuab yeej siv siab kawg tuaj yeem muab tshuaj txhuam qhov zoo li qub, BGA, QFN, 0201 cov ntaub ntawv.Nws kuj tseem siv tau rau cov qauv thaj thiab tso cov ntaub ntawv ntau los ntawm tes.

4.2.2 Obprototype pcb los ua ke kev pabcuam, ntim pcb sib dhoskev pabcuam tuaj yeem muab tau.

4.3Kev nplua nuj nyob hauv SMT PCB thiab soldering ntawm PCB, thiab nws yog lub sijhawm xa khoom ruaj khov.

4.3.1 Muaj kev pabcuam rau ntau txhiab lub tuam txhab hluav taws xob, suav nrog kev pabcuam SMT sib dhos rau ntau hom khoom siv tsheb thiab kev tswj hwm kev lag luam motherboards.PCB thiab PCB sib dhos yog xa tawm mus rau Tebchaws Europe thiab Tebchaws Meskas, thiab qhov zoo tau lees paub los ntawm cov neeg siv khoom.

4.3.2 Kev xa khoom raws sijhawm.Qhov ib txwm 3-5 hnub yog tias cov ntaub ntawv tiav thiab daws cov EQ, thiab cov khoom me me kuj tuaj yeem xa tuaj rau hauv ib hnub.

4.4Muaj peev xwm saib xyuas muaj zog thiab zoo ntawm kev pab cuam tom qab muag

4.4.1 Tus kws saib xyuas kev saib xyuas muaj kev paub dhau los thiab lawv tuaj yeem kho PCBs uas tsis zoo los ntawm ntau qhov sib txuas.Peb tuaj yeem ua kom ntseeg tau qhov sib txuas ntawm txhua tus PCB.

4.4.2 Kev pabcuam cov neeg siv khoom yuav teb rau 24-teev thiab daws koj cov teeb meem xaj kom sai li sai tau.