Nyob rau hauv tus txheej txheem ntawm kev tsim kho vajtse circuits, yuam kev yog inevitable. Ntawm no yog cov npe ntawm tsib qhov teeb meem tsim ntau tshaj plaws hauv PCB tsim thiab cov kev ntsuas sib thooj.
1. Pin yuam kev
Series linear tswj cov khoom siv hluav taws xob yog pheej yig dua li hloov cov khoom siv hluav taws xob, tab sis lawv tsis tshua muaj txiaj ntsig ntawm kev hloov hluav taws xob. Feem ntau, muab qhov yooj yim ntawm kev siv thiab tus nqi qis, ntau tus engineers xaiv siv cov khoom siv hluav taws xob linear tswj.
Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias txawm hais tias nws yooj yim siv, nws siv ntau lub zog thiab ua rau muaj cua sov ntau heev. Hauv qhov sib piv, hloov cov khoom siv hluav taws xob yog txoj hauv kev tsim tab sis muaj txiaj ntsig zoo dua.
Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias cov zis pins ntawm qee cov khoom siv hluav taws xob tswj hwm yuav tsis sib haum nrog ib leeg, yog li koj yuav tsum paub meej txog cov ntsiab lus ntawm tus pin nyob rau hauv daim ntawv qhia ua ntej xaim.
2. Kev teeb tsa tsis raug
Kev sib piv qhov sib txawv ntawm kev tsim thiab xaim yog qhov ua rau muaj kev ua yuam kev nyob rau theem kawg ntawm kev tsim PCB. Yog li ntau yam yuav tsum tau kuaj xyuas ob zaug.
Piv txwv li, ntaus ntawv loj, zoo ntawm vias, ncoo loj thiab qib ntawm kev tshuaj xyuas. Nyob rau hauv luv luv nws yuav tsum tau muab ob npaug rau tshuaj tiv thaiv tus tsim schematic.
3. Corrosion ntxiab
Lub cuab yeej tuaj yeem tsim tau thaum lub kaum sab xis ntawm PCB coj me me dhau (mob lub kaum ntse ntse).
Cov kaum ntse ntse no tuaj yeem raug daig thaum lub sij hawm corrosion ntawm lub rooj tsavxwm Circuit Court thiab tuaj yeem ua rau ntau cov tooj liab raug tshem tawm ntawm cov tooj liab tso rau ntawd, yog li tsim ib qho snag lossis ntxiab.
Tom qab ntawd, cov hlau lead tuaj yeem tawg, tsim kom muaj qhov qhib hluav taws xob. Cov txheej txheem tsim khoom niaj hnub no vim yog kev siv lub teeb-rhiab heev corrosion daws, qhov tshwm sim corrosion ntxiab no tau txo qis heev.
4. Lite-monument li
Thaum soldering me me nto-mounted li siv cov txheej txheem reflow, cov cuab yeej yuav infiltrated los ntawm lub solder los ua ib tug tib-kawg warp, feem ntau hu ua "monolith".
Qhov tshwm sim no feem ntau tshwm sim los ntawm asymmetrical wiring qauv, uas ua rau tsis sib xws thaum tshav kub kub dispersion nyob rau hauv lub ntaus ntawv pads. Siv qhov tseeb DFM tshuaj xyuas tuaj yeem pab daws qhov tshwm sim no.
5. Lead dav
Thaum qhov tam sim no ntawm PCB coj ntau tshaj 500mA, PCB thawj kab hlau yuav tshwm rau hauv lub peev xwm. Nrog rau qhov tuab thiab dav li niaj zaus, PCB nto ua rau dhau tam sim no ntau dua li cov khoom siv sab hauv ntawm lub rooj tsav xwm multilayer. Qhov no yog vim hais tias cov hlau lead tuaj yeem diffuse cua sov los ntawm huab cua ntws.
Cov hlau dav kuj muaj feem xyuam rau lub thickness ntawm cov ntawv ci tooj liab ntawm cov txheej uas nws nyob. Feem ntau cov tuam txhab PCB tso cai rau koj xaiv los ntawm tooj liab ntawv tuab xws li ntawm 0.5 oz/sq.ft txog 2.5 oz/sq.ft.
Cov lus qhia ceev ceev txog NeoDen
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30 ntxiv rau Cov Neeg Sawv Cev Thoob Ntiaj Teb muaj nyob hauv Asia, Europe, America, Oceania thiab Africa
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30 ntxiv rau kev tswj xyuas zoo thiab kev txhawb nqa engineers, 15 ntxiv rau kev muag khoom thoob ntiaj teb, raws sij hawm cov neeg siv khoom teb tsis pub dhau 8 teev, kev daws teeb meem muab hauv 24 teev
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