Printed Circuit Board Design
SMT circuit board yog ib qho tseem ceeb ntawm cov khoom siv hauv qhov chaw tsim khoom.SMT Circuit Board yog kev txhawb nqa ntawm cov khoom siv hluav taws xob thiab cov khoom siv hauv cov khoom siv hluav taws xob, uas paub txog kev sib txuas hluav taws xob ntawm cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob.Nrog rau txoj kev loj hlob ntawm cov cuab yeej siv hluav taws xob, qhov ntim ntawm PCB boards tau txais me me thiab me, qhov ntom ntom tau nce siab thiab siab dua, thiab cov txheej ntawm PCB boards tau nce ntxiv.Yog li, PCBs yuav tsum muaj ntau dua thiab siab dua cov kev xav tau ntawm tag nrho cov txheej txheem, kev tiv thaiv kev cuam tshuam, txheej txheem thiab kev tsim khoom.
Cov kauj ruam tseem ceeb ntawm PCB tsim;
1: Kos daim duab schematic.
2: Tsim cov tsev qiv ntawv tivthaiv.
3: Tsim kom muaj kev sib raug zoo network kev sib raug zoo ntawm daim duab kos duab thiab cov khoom ntawm cov ntawv luam tawm.
4: Cov kab mob thiab kab mob.
5: Tsim cov ntawv luam tawm thiab siv cov ntaub ntawv thiab tso chaw tsim khoom thiab siv cov ntaub ntawv.
Cov teeb meem hauv qab no yuav tsum tau xav txog hauv cov txheej txheem tsim ntawm cov ntawv luam tawm Circuit Board:
Nws yog ib qho tsim nyog los xyuas kom meej tias cov duab ntawm cov khoom hauv Circuit Court schematic daim duab yog ua raws li cov khoom tiag tiag thiab tias cov kev sib txuas hauv network hauv Circuit Court schematic daim duab yog qhov tseeb.
Kev tsim cov ntawv luam tawm Circuit Court boards tsis tsuas yog txiav txim siab txog kev sib txuas ntawm lub network kev sib raug zoo ntawm daim duab schematic, tab sis kuj txiav txim siab qee qhov kev xav tau ntawm kev tsim hluav taws xob hluav taws xob.Cov kev xav tau ntawm kev tsim hluav taws xob hluav taws xob feem ntau yog qhov dav ntawm cov kab hluav taws xob, cov xaim hauv av thiab lwm cov xov hlau, kev sib txuas ntawm cov kab, qee cov yam ntxwv siab zaus ntawm cov khoom, impedance ntawm cov khoom, los tiv thaiv kev cuam tshuam, thiab lwm yam.
Kev tsim cov ntawv luam tawm Circuit Court boards tsis tsuas yog txiav txim siab txog kev sib txuas ntawm lub network kev sib raug zoo ntawm daim duab schematic, tab sis kuj txiav txim siab qee qhov kev xav tau ntawm kev tsim hluav taws xob hluav taws xob.Cov kev xav tau ntawm kev tsim hluav taws xob hluav taws xob feem ntau yog qhov dav ntawm cov kab hluav taws xob, cov xaim hauv av thiab lwm cov xov hlau, kev sib txuas ntawm cov kab, qee cov yam ntxwv siab zaus ntawm cov khoom, impedance ntawm cov khoom, los tiv thaiv kev cuam tshuam, thiab lwm yam.
Cov kev cai rau kev teeb tsa ntawm lub rooj tsav xwm luam tawm tag nrho cov kab ke feem ntau yog xav txog lub installation qhov, plugs, positioning qhov, siv cov ntsiab lus, thiab lwm yam.
Nws yuav tsum ua kom tau raws li qhov yuav tsum tau ua, qhov kev tso kawm ntawm ntau yam khoom thiab kev teeb tsa raug nyob rau hauv txoj haujlwm tau teev tseg, thiab tib lub sijhawm, nws yuav tsum yooj yim rau kev teeb tsa, kev debugging, thiab qhov cua thiab cua sov dissipation.
Manufacturability ntawm luam Circuit Court boards thiab nws manufacturability yuav tsum tau, kom paub txog tus tsim specifications thiab ua tau raws li qhov yuav tsum tau ntawm ntau lawm
Cov txheej txheem yuav tsum tau ua, thiaj li hais tias cov qauv luam ntawv Circuit Court board tuaj yeem ua tau zoo.
Xav txog tias cov khoom siv tau yooj yim rau nruab, debug, thiab kho hauv kev tsim khoom, thiab tib lub sijhawm, cov duab kos rau ntawm lub rooj tsavxwm luam tawm, soldering, thiab lwm yam.
Cov phaj, vias, thiab lwm yam yuav tsum yog tus qauv los xyuas kom meej tias cov khoom tsis sib tsoo thiab yooj yim ntsia.
Lub hom phiaj ntawm kev tsim ib lub rooj tsavxwm luam tawm feem ntau yog rau daim ntawv thov, yog li peb yuav tsum xav txog nws txoj kev ua tau zoo thiab kev ntseeg tau,
Nyob rau tib lub sijhawm, txheej thiab cheeb tsam ntawm lub rooj tsavxwm luam tawm raug txo kom txo tus nqi.Raws li cov ntaub ntawv loj dua, los ntawm qhov, thiab cov xaim hluav taws xob yog qhov tsim nyog rau kev txhim kho kev ntseeg siab, txo cov vias, txhim kho kev sib txuas, thiab ua kom nws sib npaug., qhov sib xws yog qhov zoo, kom tag nrho cov txheej txheem ntawm lub rooj tsavxwm zoo nkauj dua.
Ua ntej, ua kom lub rooj tsavxwm tsim tau ua tiav lub hom phiaj xav tau, tag nrho cov txheej txheem ntawm lub rooj tsavxwm luam tawm thiab kev tso kawm ntawm cov khoom ua si yog lub luag haujlwm tseem ceeb, uas cuam tshuam ncaj qha rau kev teeb tsa, kev ntseeg siab, qhov cua thiab cua kub dissipation ntawm tag nrho cov ntawv luam tawm Circuit Board, thiab xaim tus nqi los ntawm.
Tom qab txoj haujlwm thiab cov duab ntawm cov khoom ntawm PCB raug txiav txim siab, xav txog kev xaim ntawm PCB
Qhov thib ob, txhawm rau ua kom cov khoom tsim tau ua haujlwm zoo dua thiab muaj txiaj ntsig zoo, PCB yuav tsum xav txog nws cov peev xwm tiv thaiv kev cuam tshuam hauv kev tsim, thiab nws muaj kev sib raug zoo nrog rau qhov tshwj xeeb Circuit Court.
3. Tom qab cov khoom siv thiab kev tsim hluav taws xob ntawm lub rooj tsav xwm Circuit Court ua tiav, nws cov txheej txheem tsim yuav tsum tau txiav txim siab tom ntej.Lub hom phiaj yog txhawm rau tshem tawm txhua yam tsis zoo ua ntej pib tsim khoom, thiab tib lub sijhawm, kev tsim khoom ntawm lub rooj tsav xwm yuav tsum raug coj mus rau hauv tus account txhawm rau tsim cov khoom zoo.thiab ntau lawm.
Thaum tham txog qhov chaw thiab xaim ntawm cov khoom, peb twb tau koom nrog qee cov txheej txheem ntawm lub rooj tsavxwm Circuit Court.Tus txheej txheem tsim ntawm lub rooj tsavxwm Circuit Court yog tsuas yog ua kom cov organically sib sau ua ke lub rooj tsavxwm Circuit Court thiab cov khoom peb tsim los ntawm SMT cov kab ntau lawm, thiaj li ua tiav cov khoom siv hluav taws xob zoo.Txhawm rau ua tiav txoj haujlwm thiab kev teeb tsa ntawm peb cov khoom tsim.Pad tsim, xaim thiab tiv thaiv kev cuam tshuam, thiab lwm yam, peb yuav tsum tau txiav txim siab seb lub rooj tsavxwm uas peb tsim tau yooj yim los tsim, txawm tias nws tuaj yeem sib sau ua ke nrog cov cuab yeej niaj hnub sib dhos-SMT thev naus laus zis, thiab tib lub sijhawm, nws yuav tsum ua tiav hauv ntau lawm.Cia cov xwm txheej rau kev tsim cov khoom tsis zoo tsim qhov siab tsim.Tshwj xeeb, muaj cov hauv qab no:
1: Cov kab sib txawv SMT ntau lawm muaj cov xwm txheej ntau lawm, tab sis hais txog qhov loj ntawm PCB, qhov loj ntawm pcb ib lub rooj tsavxwm tsis tsawg dua 200 * 150mm.Yog tias sab ntev me dhau lawm, koj tuaj yeem siv qhov kev txiav txim siab, thiab qhov sib piv ntawm qhov ntev mus rau qhov dav yog 3: 2 lossis 4: 3 Thaum qhov loj ntawm lub rooj tsavxwm Circuit Court yog ntau dua 200 × 150mm, lub zog txhua yam ntawm lub rooj tsavxwm yuav tsum. raug txiav txim siab.
2: Thaum qhov loj ntawm lub rooj tsav xwm Circuit Court me dhau, nws nyuaj rau tag nrho SMT kab ntau lawm txheej txheem, thiab nws tsis yooj yim rau tsim nyob rau hauv batch.Cov laug cam tau muab sib xyaw ua ke los tsim ib lub rooj tsav xwm tag nrho tsim nyog rau kev tsim khoom loj, thiab qhov loj ntawm tag nrho pawg thawj coj yuav tsum tsim nyog rau qhov loj ntawm pasteable ntau yam.
3: Yuav kom hloov mus rau qhov chaw ntawm cov kab ntau lawm, 3-5mm ntau yuav tsum tau sab laug ntawm lub veneer yam tsis muaj cov khoom, thiab 3-8mm txheej txheem ntug yuav tsum tau sab laug ntawm lub vaj huam sib luag.Muaj peb hom kev sib txuas ntawm cov txheej txheem ntug thiab PCB: A tsis muaj qhov sib tshooj, muaj qhov sib cais, B muaj ib sab, thiab muaj qhov sib cais, C muaj ib sab, tsis muaj qhov sib cais.Muaj txheej txheem blanking.Raws li cov duab ntawm PCB pawg thawj coj saib, muaj ntau hom jigsaw.Rau PCB Txoj kev tso chaw ntawm cov txheej txheem sab yog txawv raws li cov qauv sib txawv.Qee qhov muaj qhov chaw nyob ntawm tus txheej txheem sab.Txoj kab uas hla ntawm lub qhov yog 4-5 cm.Kev hais lus zoo, qhov tseeb ntawm qhov chaw yog siab dua li ntawm sab, yog li muaj qhov chaw tso rau qhov chaw.Thaum tus qauv ua PCB, nws yuav tsum tau nruab nrog qhov chaw tso, thiab lub qhov tsim yuav tsum yog tus qauv, thiaj li tsis ua rau tsis yooj yim rau kev tsim khoom.
4: Yuav kom nrhiav tau qhov zoo dua thiab ua tiav qhov raug siab dua mounting, nws yog ib qho tsim nyog yuav tsum tau teeb tsa qhov taw qhia rau PCB.Txawm hais tias muaj cov ntsiab lus siv thiab seb nws zoo lossis tsis zoo yuav cuam tshuam ncaj qha rau kev tsim khoom loj ntawm SMT cov kab ntau lawm.Cov duab ntawm cov ntsiab lus siv tuaj yeem yog square, ncig, daim duab peb sab, thiab lwm yam. Thiab txoj kab uas hla yog nyob rau hauv thaj tsam li ntawm 1-2mm, thiab nws yuav tsum nyob rau hauv thaj tsam ntawm 3-5mm nyob ib ncig ntawm qhov siv taw tes, tsis muaj cov khoom siv thiab cov khoom siv. .Nyob rau tib lub sijhawm, qhov taw qhia siv yuav tsum du thiab tiaj tus yam tsis muaj pa phem.Qhov tsim ntawm qhov taw tes siv yuav tsum tsis txhob ze rau ntawm ntug ntawm lub rooj tsavxwm, thiab yuav tsum muaj qhov deb ntawm 3-5mm.
5: Los ntawm kev xaav ntawm tag nrho cov txheej txheem ntau lawm, cov duab ntawm lub rooj tsavxwm zoo dua pitch-zoo li tus, tshwj xeeb tshaj yog rau yoj soldering.Kev siv cov duab plaub yog yooj yim rau kev sib kis.Yog tias muaj qhov ploj lawm ntawm lub rooj tsavxwm PCB, qhov uas ploj lawm yuav tsum tau sau rau hauv daim ntawv ntawm txheej txheem ntug.Rau ib zaug Lub SMT board tso cai rau qhov ploj lawm.Tab sis cov qhov uas ploj lawm tsis yooj yim kom loj dhau thiab yuav tsum tsawg dua 1/3 ntawm qhov ntev ntawm sab.
Nyob rau hauv luv luv, qhov tshwm sim ntawm cov khoom puas yog ua tau nyob rau hauv txhua qhov txuas, tab sis kom deb li deb ntawm PCB board tsim muaj kev txhawj xeeb, nws yuav tsum tau txiav txim siab los ntawm ntau yam, kom nws tsis tuaj yeem paub lub hom phiaj ntawm peb cov khoom tsim, tab sis. kuj tsim nyog rau SMT ntau lawm kab hauv ntau lawm.Kev tsim khoom loj, sim peb qhov zoo tshaj plaws los tsim cov khoom lag luam zoo PCB, thiab txo qis qhov tshwm sim ntawm cov khoom puas.
Lub sij hawm xa tuaj: Plaub Hlis-10-2023