Daim ntawv tshaj tawm tshuaj xyuas DFM tsis yog qhov tsim tawm.
Nws yog ib tug handoff.
Ua ntej PCB Assembly pib, cov lus nug tiag tiag tsis yog pom muaj pes tsawg DFM cov lus pom. Cov lus nug tiag tiag yog seb cov lus no puas tau hloov mus rau kev txiav txim siab tsim: dab tsi yuav tsum tau hloov, dab tsi tuaj yeem lees txais rau qhov tsim no, dab tsi xav tau txheej txheem lossis kev tshuaj xyuas, thiab dab tsi yuav tsum tuav lub tsev kom txog rau thaum tus tswv txoj cai txiav txim siab.
Qhov no yog qhov uas ntau qhov haujlwm PCBA poob sijhawm.
OEM tuaj yeem ntseeg tias lub rooj tsavxwm tau npaj txhij vim tias BOM, Gerber lossis ODB++ cov ntaub ntawv, CPL cov ntaub ntawv, thiab cov duab kos tau raug xa mus. Pab pawg EMS tseem tuaj yeem pom cov kev pheej hmoo tsis txaus ntseeg nyob ib puag ncig hneev taw haum, polarity marking, qhov sib txawv ntawm cov khoom sib txuas, panelization, solderability, test access, lossis kev soj ntsuam xyuas.
DFM cov lus pom tsis yog ib qho thaiv. Nws dhau los ua ib qho teeb meem thaum tsis muaj leej twg txiav txim siab yuav ua li cas nws yuav daws ua ntej kev tsim tawm.
DFM cov lus tsis yog qhov kawg tso tawm. Tsim kev tso tawm yog qhov kev txiav txim siab.
Kev tshuaj xyuas DFM yog ib qho Handoff, Tsis yog kab tiav
Kev tshuaj xyuas DFM feem ntau tau piav qhia tias yog ib txoj hauv kev los txhim kho kev tsim khoom. Qhov ntawd yog qhov tseeb, tab sis nws yog qhov dav dav heev rau qhov project uas tab tom yuav nkag mus rau hauv kev sib dhos.
Nyob rau theem no, pab neeg no tsis yog xav tau kev soj ntsuam xwb. Nws xav tau kev txiav txim siab.
Daim ntawv tshaj tawm DFM tuaj yeem hais tias qhov sib nrug ntawm ob lub ntsiab lus yog qis dua txoj cai nyiam. Cov lus ntawd ib leeg tsis qhia rau pab pawg SMT seb puas yuav tsum nres, txuas ntxiv mus, tshuaj xyuas kom zoo dua, kho cov txheej txheem sau tseg, lossis tos kom hloov pauv.
Txoj kev kaw DFM muaj txiaj ntsig yuav tsum txav mus rau txhua qhov kev tshawb pom muaj txiaj ntsig rau hauv ib qho ntawm plaub txoj hauv kev:
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DFM Txoj Cai |
Nws txhais li cas ua ntej PCB Assembly |
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Kho ua ntej tsim |
Tus tsim, BOM, kos duab, lossis cov ntaub ntawv pob yuav tsum tau hloov kho ua ntej kev sib dhos pib |
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Txais nrog kev tswj hwm |
Kev tsim kho tuaj yeem ua tiav, tab sis pab pawg EMS xav tau cov txheej txheem teev tseg, tshuaj xyuas, lossis kev tswj xyuas |
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Txais rau qhov tsim no nkaus xwb |
Qhov kev pheej hmoo yog tsim nyog rau kev tsim qauv lossis engineering tsim, tab sis yuav tsum tau kho ua ntej tsav tsim lossis tsim khoom |
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Tuav tso |
Qhov teeb meem tsis meej txaus los tso tawm qhov tsim |
Qhov no yog qhov sib txawv ntawm kev tshuaj xyuas DFM uas tsuas muaj tshwm sim thiab kev tshuaj xyuas DFM uas tau tswj hwm kev pheej hmoo sib dhos.
Ib daim ntawv teev lus ntev yuav zoo meej. Nws tsis muaj txiaj ntsig kom txog thaum txhua qhov kev tawm tswv yim muaj kev pom zoo.
Pib los ntawm Kev Sib Cais Showstoppers los ntawm Kev Tswj Xyuas Kev Nyab Xeeb
Tsis yog txhua qhov kev tshawb nrhiav DFM tsim nyog tau txais cov lus teb tib yam.
Qee qhov teeb meem yuav tsum nres qhov tsim. Lwm tus tuaj yeem nqa mus rau hauv kev tsim thawj zaug yog tias tus neeg yuav khoom nkag siab txog kev lag luam -tawm thiab pab pawg EMS muaj cov phiaj xwm tswj tau.
Kev tshawb pom uas feem ntau thaiv kev tsim tawm
Cov no yog cov teeb meem uas tuaj yeem tiv thaiv lub rooj tsavxwm los ntawm kev tsim, tshuaj xyuas, lossis kuaj raws li qhov xav tau:
- cov pob khoom xaiv tsis sib xws nrog PCB av qauv;
- pin 1, polarity, los yog connector orientation tsis meej;
- BOM, CPL, thiab kev sib dhos kos duab tsis pom zoo;
- fiducials, tooling qhov, vaj huam sib luag rails, los yog depaneling txoj kev tsis haum rau kev sib dhos;
- yuav tsum tau programming lossis xeem nkag tau raug thaiv lub cev;
- tivthaiv clearance tsis sib haum nrog txhua yam khoom, cables, enclosure phab ntsa, los yog nyob ze high -profile Cheebtsam;
- PCB fabrication cov ntaub ntawv thiab cov ntaub ntawv sib dhos zoo li los ntawm kev hloov kho sib txawv.
Cov no tsis yog "kev nyiam tsim." Lawv tuaj yeem cuam tshuam rau soldering, tso chaw, tshuaj xyuas, kuaj, rov ua dua, lossis thawj tsab xov xwm tshuaj xyuas.
Yog tias ib qho ntawm cov teeb meem no tseem qhib, tso tawm qhov tsim feem ntau ua rau muaj kev pheej hmoo ntau dua li nws txuag sijhawm.
Cov kev tshawb nrhiav uas tuaj yeem tswj tau rau ib qho kev tsim tshwj xeeb
Lwm cov teeb meem tuaj yeem ua tau raws li cov xwm txheej tau hais tseg:
- nruj tab sis buildable tivthaiv sib nrug;
- txwv kev nkag mus rau kev soj ntsuam pom lossis rov ua haujlwm dua;
- manual probing es tsis txhob automated ICT rau kev tsim engineering;
- xaiv tes- kev ua haujlwm soldering;
- ib ntus firmware loading txoj kev;
- haum- kuaj cov qauv uas tsis yog tsim los sawv cev rau kev tsim khoom- npaj txhij;
- Kev tshuaj xyuas ntxiv yuav tsum tau muab zais rau cov pob qij txha los yog txheej txheem - qhov chaw rhiab heev.
Cov kev pheej hmoo no yuav tsum tsis txhob ignored. Lawv yuav tsum tau sau tseg raws li kev tsim kho.
Qhov txaus ntshai uas tsis muaj kev tswj hwm tsuas yog qhov teeb meem qeeb.
Ua Qhov Kev Ntsuas Kawg Ua ntej tso tawm
Tus naj npawb tsis txaus ntseeg ntawm DFM- cuam tshuam txog kev ncua tsis yog los ntawm qhov tsis zoo ntawm tus qauv tsim.
Lawv tshwm sim vim tias ib cov ntaub ntawv tau hloov kho thiab qhov seem ntawm cov pob tsim tsis yog.
Cov txheej txheem yuav raug kho tom qab DFM tshuaj xyuas, tab sis CPL cov ntaub ntawv tseem tuaj yeem los ntawm kev xa tawm ua ntej. Ib qho txuas tuaj yeem hloov pauv hauv BOM, tab sis daim duab sib dhos tseem tuaj yeem pom cov ntawv dhau los. Ib yam khoom DNP tuaj yeem raug tshem tawm ntawm BOM tab sis tseem nyob hauv cov ntaub ntawv tso npe. Daim ntawv ceeb toom kev ua haujlwm tuaj yeem xav tias kev nkag mus rau qhov txuas uas tsis muaj tom qab hloov kho tshuab.
Ua ntej PCB Assembly pib, lub pob tsim yuav tsum qhia ib zaj dab neeg zoo ib yam.
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Cov ntaub ntawv kev sib raug zoo |
Dab tsi yuav tsum tau kuaj xyuas |
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BOM vs. PCB hneev taw |
Cov MPN uas xaiv puas phim cov qauv av thiab pob? |
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BOM vs. sib dhos kos duab |
Puas yog DNP/DNI cov khoom, polarity, thiab cov ntawv tshwj xeeb ua raws? |
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CPL vs. assembly drawing |
Puas yog kev sib hloov, sab, kev sib koom ua ke, thiab cov neeg tsim qauv siv tau zoo sib xws? |
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Gerber lossis ODB++ vs |
Puas yog fiducials, rails, tooling qhov, thiab depaneling txwv kom meej? |
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Kev xeem yuav tsum tau xeem vs |
Puas yog qhov kev tshuaj ntsuam xyuas, kev soj ntsuam, lossis kev sim ua haujlwm puas tuaj yeem ua tiav? |
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Programming method vs. access |
Cov firmware puas tuaj yeem thauj khoom tom qab sib dhos, txheej, lossis kev sib koom ua ke? |
Cov kauj ruam no yuav xav tias yooj yim, tab sis nws ntes cov teeb meem uas txwv tsis pub tshwm sim lig. Kev kuaj xyuas yooj yim feem ntau yog cov neeg hla thaum lub sijhawm nruj.
Thaum qhov project ncav cuag kitting, SMT programming, AOI teeb, lossis thawj tsab xov xwm tshuaj xyuas, cov ntaub ntawv tsis sib haum tsis yog qhov teeb meem ntawm cov ntaub ntawv ntxiv lawm. Nws yog kev cuam tshuam ntau lawm.
Txhua qhov kev tsis sib haum xeeb uas cuam tshuam txog kev muab khoom, kev tso kawm, kev tshuaj xyuas, kev ua haujlwm, lossis kev sim yuav tsum raug daws lossis raug cai ua ntej tsim tawm.
Tig Tau Txais Kev Nyab Xeeb rau hauv Cov Txheej Txheem, Kev Tshuaj Xyuas, lossis Kev Tswj Xyuas Kev Xeem
Muaj cov laj thawj zoo los lees txais qee qhov kev pheej hmoo DFM rau kev tsim thawj zaug.
Tej zaum yuav xav tau ib tus qauv rau firmware nqa -. Ib qho me me engineering batch yuav siv tau rau kev siv tshuab. Tus neeg siv khoom tuaj yeem xaiv los ntsuas qhov kev hloov kho tam sim no ua ntej hloov qhov layout dua.
Qhov ntawd tuaj yeem tsim nyog.
Tab sis lees txais kev pheej hmoo tsis zoo ib yam li ua piv txwv qhov kev pheej hmoo tsis muaj nyob.
Yog tias qhov kev tshawb pom DFM raug zam rau kev tsim tam sim no, pob tsim yuav tsum qhia seb qhov kev pheej hmoo yuav raug tswj li cas.
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Txais Risk |
Muaj peev xwm tsim tswj |
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Tight qhov sib nrug |
Ntxiv qhov chaw tsom mus soj ntsuam thiab txwv qhov kev cia siab ua haujlwm dua |
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Cov pob qij txha zais hauv BGA lossis QFN pob |
Xyuas seb puas yuav tsum tau kuaj X-ray rau qhov tsim no |
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Txwv tsis pub nkag mus rau ICT |
Siv kev sojntsuam ya los yog kev sim ua haujlwm yog qhov tsim nyog |
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Tes- soldered connector |
Ntxiv kev tshuaj xyuas kev ua haujlwm thiab rov ua haujlwm dua |
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Txoj kev programming ib ntus |
Sau firmware version, cuab yeej, interface, thiab pov thawj kauj ruam |
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Tsis paub meej enclosure clearance |
Tso cov qauv rau kev kuaj xyuas kom haum, tab sis tsis txhob kho lawv raws li kev tsim khoom- npaj txhij |
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Txheej txheem- qhov tseem ceeb |
Ntxiv tuav, tswj dej noo, lossis tshuaj ntsuam xyuas qhov xav tau |
Qhov no yog qhov uas DFM tshuaj xyuas dhau los ua kev qhia kev tsim khoom.
Pab pawg tsim khoom yuav tsum tsis txhob txhais cov kev pheej hmoo lees paub los ntawm email saw thaum cov kab tab tom npaj. Nws yuav tsum tshwm sim hauv cov ntawv sau ua ke, kev tshuaj ntsuam xyuas, phiaj xwm kev sim, lossis tsim cov ntaub ntawv tso tawm.
Ua kom muaj tswv yim pom tau ua ntej Kev Tsim Txiaj Ntsig
Kev tshawb pom DFM feem ntau nyob twj ywm tsis yog vim tias cov lus teb tsis tuaj yeem ua tsis tau, tab sis vim yog tswv cuab tsis meej.
OEM layout engineer yuav xav tias pab pawg EMS tuaj yeem tswj qhov teeb meem thaum sib dhos. Tus kws tshaj lij EMS tus txheej txheem tuaj yeem ntseeg tias pab pawg tsim yuav tsum hloov kho tus hneev taw. Tus neeg yuav khoom tus thawj tswj xyuas qhov project yuav xav tias qhov teeb meem me me vim tias tsis muaj leej twg tau tso tseg lub sijhawm. Pab neeg nrhiav khoom yuav tsis paub tias ib qho kev hloov pauv tseem tab tom tos kev pom zoo engineering.
Qhov no yog li cas cov lus me me dhau los ua lig -stage blockers.
Ua ntej tsim kev tso tawm, txhua yam tsis daws teeb meem yuav tsum teb plaub nqe lus nug:
- Qhov teeb meem yog dab tsi?
- Leej twg yog tus tswv ntawm qhov kev txiav txim?
- Qhov kev tsim tawm yog dab tsi?
- Yuav tsum muaj dab tsi tshwm sim ua ntej tso tawm?
Ib qho yooj yim qhib- khoom cav feem ntau txaus:
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Qhib yam khoom |
Tus tswv |
Tsim kev cuam tshuam |
Yuav tsum tau ua |
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Pin 1 cim tsis meej ntawm U12 |
OEM kho vajtse engineer |
Kev pheej hmoo ntawm qhov chaw |
Paub meej tias kev taw qhia ua ntej SMT programming |
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Connector alternate proposed |
Kev pab OEM + EMS |
Haum thiab hluav taws xob txaus ntshai |
Pom zoo lossis tsis lees txais lwm yam |
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Kev ntsuas nkag tau txwv ntawm lub zog tsheb ciav hlau |
OEM xeem engineer |
Txo qhov kev kuaj mob |
Txheeb xyuas txoj kev sim ua ntej tsim tawm |
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BGA kev soj ntsuam yuav tsum tsis meej |
EMS zoo + OEM |
Txoj kev soj ntsuam |
Txheeb xyuas qhov ntsuas |
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Vaj huam sib luag rail dav nyob rau hauv kev tshuaj xyuas |
EMS txheej txheem engineer |
Handling thiab depaneling |
Paub meej tias vaj huam sib luag tsim ua ntej PCB fabrication |
Kev tsim yuav tsum tsis txhob txav mus tom ntej vim tias txhua tus xav tias lwm tus tau lees txais qhov kev pheej hmoo.
Tsim kev tso tawm yuav tsum tshwm sim vim cov neeg raug txiav txim siab raug.
Khaws Tsim Tso Cai Sib Cais los ntawm Thawj Kab Lus Pom Zoo
Tsim kev tso tawm thiab thawj tsab ntawv pom zoo muaj feem cuam tshuam, tab sis lawv tsis yog tib yam.
Kev tsim tawm tshwm sim ua ntej kev sib dhos pib. Nws lees paub tias cov ntaub ntawv tsim, BOM, sau ntawv sib dhos, cov txheej txheem tswj, kev soj ntsuam xyuas, thiab qhib - cov kev txiav txim siab yog npaj rau thawj zaug.
Thawj tsab ntawv pom zoo tshwm sim tom qab thawj pawg thawj coj lossis thawj pawg tsim thiab tshuaj xyuas. Nws paub meej tias seb qhov kev sib dhos tiag tiag sib phim lub pob tsim tawm.
Qhov kev sib txawv no tseem ceeb.
Ib qhov project tuaj yeem muaj kev tso tawm kom huv thiab tseem pom qhov teeb meem tshiab thaum thawj tsab xov xwm tshuaj xyuas. Qhov ntawd tsis txhais hais tias kev tshuaj xyuas DFM ua tsis tiav. Nws txhais tau hais tias thawj tsim tsim cov ntaub ntawv pov thawj tshiab.
Thaum qhov ntawd tshwm sim, pab pawg yuav tsum tsis txhob tuav nws li casually. Qhov kev tshawb pom yuav tsum raug kho raws li cov khoom qhib tshiab, tshuaj xyuas qhov hnyav, thiab kaw los ntawm tib txoj kev qhuab qhia: kho, lees txais nrog kev tswj hwm, lees txais rau qhov kev tsim no nkaus xwb, lossis tuav kev tso tawm ntxiv.
Qhov no ua rau qhov project los ntawm drifting mus rau hauv kev txiav txim siab tsis raws cai tom qab kev tsim khoom tau pib lawm.
Dab tsi yuav tsum tau kaw ua ntej PCB los ua ke pib
Ua ntej thawj lub rooj tsavxwm nkag mus rau hauv kev sib sau ua ke, ntau qhov chaw yuav tsum tau tshuaj xyuas thiab kaw.
Hneev taw thiab pob sib tw
Cov khoom xaiv hauv BOM yuav tsum phim cov qauv av ntawm PCB. Kev tsis sib haum xeeb tuaj yeem ua rau muaj qhov tsis xws luag, kev sib txuas, kev ntub dej tsis zoo, tombstoning, lossis qhov chaw tsis ua haujlwm.
Polarity thiab orientation
Diodes, electrolytic capacitors, ICs, connectors, LEDs, thiab lwm yam polarized Cheebtsam xav tau kev taw qhia meej. Yog hais tias lub silkscreen, kos duab sib dhos, thiab CPL cov ntaub ntawv tsis pom zoo, kev tsim yuav tsum tsis txhob cia siab rau kev kwv yees.
Panelization thiab tuav
Kev tsim vaj huam sib luag cuam tshuam rau stencil luam ntawv, kev txhawb nqa kev tso kawm, kev ruaj ntseg reflow, depaneling, thiab tshuaj xyuas. Lub rooj tsavxwm tuaj yeem tsim tau tab sis tseem ua tau txawv txawv rau kev sib sau yog tias cov ntsia hlau, cov khoom siv, cov cuab yeej siv, lossis txoj kev sib cais tsis haum.
Test thiab programming nkag
Yog tias tus neeg yuav khoom xav tau kev ua haujlwm, lub zog- ntawm kev txheeb xyuas, ICT, kev sojntsuam ya, lossis kev sim ua haujlwm, lub rooj tsavxwm yuav tsum muaj kev nkag mus siv tau. Ib qho kev xeem uas tsis tuaj yeem ua rau lub cev tsis yog ib qho kev sim.
Txoj kev soj ntsuam
AOI, kev tshuaj xyuas qhov muag, thiab X-kev tshuaj ntsuam kab hluav taws xob yuav tsum ua raws li qhov kev pheej hmoo ntawm pawg thawj coj saib xyuas. Hidden joints, BGAs, QFNs, dense connectors, fine-pitch SMT, and high-reliability applications may need more deliberate inspection planning.
Kev kho kom haum
BOM, Gerber lossis ODB++ cov ntaub ntawv, CPL cov ntaub ntawv, kos duab sib dhos, cov txheej txheem kuaj, thiab cov ntawv sau firmware yuav tsum taw tes rau tib qhov kev hloov kho. Yog tias cov ntaub ntawv tsis sib haum, thawj tsab xov xwm tshuaj xyuas yuav nyuaj rau kev ntseeg siab.
Hloov cov cai tom qab tso tawm
Thaum tsim tawm, txhua qhov kev hloov pauv rau BOM, PCB cov ntaub ntawv, CPL, sau ntawv sib dhos, txheej txheem kev ua haujlwm, lossis kev sim yuav tsum ua raws li kev pom zoo hloov pauv. Txwv tsis pub, qhov project tuaj yeem ntsiag to rov qab mus rau cov lus qhia sib xyaw tom qab lub rooj vag twb dhau lawm.
Ib Daim Ntawv Thov DFM kaw
Daim ntawv kaw DFM tsis tas yuav ntev. Nws yuav tsum siv tau.
Lub ntsiab lus yog los qhia qhov tau pom, qhov kev txiav txim siab twg tau txiav txim siab, leej twg yog tus tswv ntawm kev ua raws -, thiab seb qhov kev tsim kho puas tuaj yeem ua mus ntxiv.
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DFM khoom |
xwm txheej |
Kev txiav txim siab |
Ua raws li -Tom qab |
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U3 hneev taw tiv thaiv MPN xaiv |
Kaw |
Kev tsim kho tuaj yeem ua tiav |
Tsis muaj |
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J2 connector spacing nruj |
Txais nrog kev tswj hwm |
Ntxiv daim ntawv tshuaj ntsuam |
Saib xyuas ua ntej kev hloov kho tom ntej |
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Kev nkag mus rau ICT txwv ntawm VCC_5V |
Txais rau qhov tsim no |
Siv txoj kev sim ua haujlwm |
Txhim kho kev nkag mus rau hauv kev hloov kho PCB tom ntej |
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BGA soj ntsuam Scope |
Kaw |
Kev tshuaj xyuas txoj kev paub tseeb |
Ntxiv rau txoj kev kuaj xyuas |
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CPL kev sib hloov rau D5 |
Qhib |
Tsim tuav |
OEM kom paub meej ua ntej SMT qhov kev tso tawm |
Cov ntaub ntawv zoo li no ua rau DFM tshuaj xyuas txuas nrog rau kev txiav txim siab tso tawm.
Nws kuj pab tau tom qab tsim. Yog tias muaj teeb meem tshwm sim, pab pawg tuaj yeem tshawb xyuas seb nws puas yog qhov teeb meem tshiab, paub txog qhov txaus ntshai, lossis kev txiav txim siab kaw uas yuav tsum tau hloov ua ntej kev tsim kho tom ntej.
Qhov twg STHL haum rau hauv qhov kev sib tham no
Rau cov neeg yuav khoom OEM, DFM tshuaj xyuas yog qhov tseem ceeb tshaj plaws thaum nws ua rau kev txiav txim siab tsim, tsis yog cov npe ntawm cov lus pom.
STHL txhawb OEM tej yaam num los ntawmPCB Assembly, PCB prototyping, tivthaiv kev sib koom ua ke, engineering ntaub ntawv tshuaj xyuas, kev npaj ntau lawm, thiabKev kuaj thiab tshuaj xyuas. Hauv DFM-theem kev sib tham, kev ua haujlwm feem ntau suav nrog kev tshuaj xyuas seb BOM cov ntaub ntawv, Gerber lossis ODB++ cov ntaub ntawv, CPL cov ntaub ntawv, cov ntawv sau ua ke, cov kev xav tau tshuaj xyuas, thiab cov kev cia siab rau kev sim tau npaj rau cov kauj ruam tom ntej.
Kev huv DFM kaw txheej txheem pab ob pab pawg OEM thiab EMS nkag siab txog qhov yuav tsum tau kho, dab tsi tuaj yeem lees txais rau qhov tsim no, thiab qhov yuav tsum tau ua kom zoo dua ua ntej tsim los yog tsim khoom.
Npaj lub PCB los ua ke tom qab DFM tshuaj xyuas? Xa koj qhov project los ntawmThov ib daim Quotelos yog emailinfo@pcba-china.com.
Xaus
Ua ntej PCB los ua ke pib, DFM kev tshuaj xyuas feem ntau yog qhov ua tau zoo kawg uas qhov kev txhawj xeeb ntawm kev tsim khoom tseem tuaj yeem hloov mus rau qhov kev txiav txim siab tsim.
Tus nqi tsis nyob hauv daim ntawv qhia nws tus kheej. Tus nqi yog nyob rau hauv dab tsi pab neeg ua nrog cov kev tshawb pom.
Qee qhov teeb meem yuav tsum tau kho ua ntej tso tawm. Qee qhov yuav raug lees txais nrog cov txheej txheem, tshuaj xyuas, lossis kev tswj xyuas. Qee qhov yuav ua tau rau thawj engineering tsim tab sis yuav tsum tau kho ua ntej pilot tsim los yog ntau lawm. Qee tus yuav tsum tuav lub tsev kom txog rau thaum tus tswv txoj cai txiav txim siab.
Kev tsim- npaj DFM kaw txheej txheem muab rau EMS pab pawg kom paub meej txog kev sib dhos thiab muab OEM tus neeg yuav khoom pom zoo dua ntawm cov kev pheej hmoo raug nqa mus rau thawj qhov tsim.
PCB Assembly yuav tsum tsis txhob pib yooj yim vim tias cov ntaub ntawv pob zoo li ua tiav.
Nws yuav tsum pib vim qhov tseem ceeb ntawm DFM qhov kev tshawb pom tau raug tshuaj xyuas, muab, kaw, lossis txhob txwm lees txais.
