Cov txheej txheem tsim PCB dav dav yog raws li hauv qab no:
Kev npaj ua ntej → PCB qauv tsim → qhia lub rooj sib tham → txoj cai teeb tsa → PCB layout → thaiv → thaiv kev ua kom zoo thiab kev tshuaj ntsuam luam ntawv → network thiab DRC kos thiab qauv kos → tso tawm lub teeb tha xim → lub teeb duab tshuaj xyuas → PCB pawg thawj coj saib / cov ntaub ntawv sampling → PCB board Hoobkas engineering EQ kev pom zoo → SMD cov ntaub ntawv tso zis → project tiav.
1: Kev npaj ua ntej
Qhov no suav nrog kev npaj cov tsev qiv ntawv pob thiab schematic.Ua ntej PCB tsim, ua ntej npaj cov schematic SCH logic pob thiab PCB pob tsev qiv ntawv.Lub tsev qiv ntawv pob tuaj yeem PADS tuaj nrog lub tsev qiv ntawv, tab sis feem ntau nws nyuaj rau nrhiav qhov yog, nws yog qhov zoo tshaj plaws los ua koj tus kheej lub tsev qiv ntawv pob raws li cov ntaub ntawv loj ntawm cov khoom xaiv.Hauv txoj ntsiab cai, ua ntej ua PCB pob tsev qiv ntawv, thiab tom qab ntawd ua SCH logic pob.PCB pob tsev qiv ntawv xav tau ntau dua, nws ncaj qha cuam tshuam rau kev teeb tsa ntawm lub rooj tsavxwm;SCH logic pob yuav tsum tau xoob, tsuav yog koj them sai sai rau lub ntsiab lus ntawm tus pin zoo thiab kev sib txuas lus nrog PCB pob ntawm kab.PS: xyuam xim rau tus qauv tsev qiv ntawv ntawm cov pins zais.Tom qab ntawd yog tus tsim ntawm schematic, npaj pib ua PCB tsim.
2: PCB qauv tsim
Cov kauj ruam no raws li lub rooj tsav xwm loj thiab qhov chaw kho tshuab tau raug txiav txim siab, PCB tsim ib puag ncig los kos lub PCB board nto, thiab qhov chaw yuav tsum tau muab tso rau ntawm qhov yuav tsum tau txuas, cov yuam sij / keyboards, ntsia hlau qhov, sib dhos qhov, thiab lwm yam. Thiab ua tib zoo xav txog thiab txiav txim siab txog qhov chaw txuas thiab qhov chaw tsis muaj xov hlau (xws li ntau npaum li cas nyob ib ncig ntawm lub qhov ntsia hlau yog nyob rau thaj chaw tsis muaj xov hlau).
3: Qhia netlist
Nws raug nquahu kom import cov board ncej ua ntej importing netlist.Ntshuam DXF hom board ncej los yog emn hom board ncej.
4: Kev teeb tsa
Raws li kev tsim PCB tshwj xeeb tuaj yeem teeb tsa txoj cai tsim nyog, peb tab tom tham txog cov cai yog PADS tus tswj hwm kev txwv, los ntawm tus tswj hwm kev txwv hauv ib feem ntawm cov txheej txheem tsim rau kab dav thiab kev nyab xeeb qhov sib txawv, tsis ua raws li cov kev txwv. ntawm kev tshawb pom DRC tom ntej, yuav raug cim nrog DRC Markers.
Kev teeb tsa dav dav yog muab tso ua ntej qhov kev teeb tsa vim tias qee zaum qee qhov kev ua haujlwm fanout yuav tsum ua kom tiav thaum lub sijhawm teeb tsa, yog li cov cai yuav tsum tau teeb tsa ua ntej fanout, thiab thaum tsim qhov project loj dua, tus qauv tsim tuaj yeem ua tiav ntau dua.
Nco tseg: Cov kev cai tau teeb tsa kom ua tiav cov qauv tsim kom zoo dua thiab nrawm dua, ua lwm yam lus, kom pab txhawb tus tsim qauv.
Cov chaw tsis tu ncua yog.
1. Default kab dav / kab sib nrug rau cov teeb liab.
2. Xaiv thiab teeb lub qhov dhau
3. Kab dav thiab xim xim rau cov cim tseem ceeb thiab cov khoom siv hluav taws xob.
4. board txheej txheej.
5: PCB layout
Kev teeb tsa dav dav raws li cov hauv qab no.
(1) Raws li cov khoom siv hluav taws xob uas tsim nyog, feem ntau muab faib ua: thaj tsam digital Circuit Court (uas yog, kev ntshai ntawm kev cuam tshuam, tab sis kuj tsim kev cuam tshuam), thaj tsam analog Circuit Court (ntshai ntawm kev cuam tshuam), lub zog tsav cheeb tsam (kev cuam tshuam qhov chaw. ).
(2) ua kom tiav tib txoj haujlwm ntawm lub voj voog, yuav tsum tau muab tso rau ze li sai tau, thiab kho cov khoom kom ntseeg tau tias kev sib txuas zoo tshaj plaws;Nyob rau tib lub sijhawm, kho qhov chaw txheeb ze ntawm cov blocks ua haujlwm kom muaj kev sib raug zoo tshaj plaws ntawm cov haujlwm ua haujlwm.
(3) Rau qhov loj ntawm cov khoom yuav tsum xav txog qhov chaw teeb tsa thiab lub zog installation;Thaum tshav kub kub-generating Cheebtsam yuav tsum tau muab tso rau cais los ntawm kub-sensitive Cheebtsam, thiab thermal convection ntsuas yuav tsum tau txiav txim siab thaum tsim nyog.
(4) I/O tsav tsheb li ze li sai tau mus rau sab ntawm lub rooj tsavxwm luam ntawv, ze rau cov hlau lead-hauv connector.
(5) moos generator (xws li: siv lead ua lossis moos oscillator) kom ze li sai tau rau cov cuab yeej siv rau lub moos.
(6) nyob rau hauv txhua qhov kev sib xyaw ua ke ntawm lub hwj chim input tus pin thiab hauv av, koj yuav tsum tau ntxiv ib tug decoupling capacitor (feem ntau yog siv high-frequency kev ua tau zoo ntawm lub monolithic capacitor);board qhov chaw yog ntom, koj tuaj yeem ntxiv ib lub tantalum capacitor nyob ib ncig ntawm ob peb integrated circuits.
(7) lub relay coil ntxiv ib qho kev tawm diode (1N4148 tuaj yeem).
(8) Cov txheej txheem tsim kom muaj kev sib npaug, kev ua kom zoo, tsis yog lub taub hau hnyav lossis lub dab dej.
Kev saib xyuas tshwj xeeb yuav tsum tau them rau qhov kev tso kawm ntawm cov khoom, peb yuav tsum xav txog qhov loj me ntawm cov khoom (qhov chaw thiab qhov siab nyob), qhov chaw txheeb ze ntawm cov khoom kom ntseeg tau tias cov hluav taws xob ua haujlwm ntawm lub rooj tsavxwm thiab kev ua tau zoo thiab kev yooj yim ntawm kev tsim khoom thiab kev teeb tsa tib lub sijhawm, yuav tsum xyuas kom meej tias cov ntsiab lus saum toj no tuaj yeem cuam tshuam rau hauv qhov chaw ntawm kev hloov kho kom tsim nyog rau qhov kev tso kawm ntawm cov cuab yeej, kom nws zoo huv si thiab zoo nkauj, xws li tib lub cuab yeej yuav tsum tau muab tso rau hauv zoo tib yam, tib txoj kev.Tsis tuaj yeem muab tso rau hauv "staggered".
Cov kauj ruam no muaj feem xyuam nrog tag nrho cov duab ntawm lub rooj tsavxwm thiab qhov nyuaj ntawm kev xaim txuas ntxiv, yog li kev siv zog me ntsis yuav tsum tau txiav txim siab.Thaum nteg tawm lub rooj tsavxwm, koj tuaj yeem ua qhov kev xaim ua ntej rau qhov chaw uas tsis paub meej, thiab muab kev txiav txim siab tag nrho.
6: kab mob
Kev xaim yog cov txheej txheem tseem ceeb tshaj plaws hauv tag nrho PCB tsim.Qhov no yuav cuam tshuam ncaj qha rau kev ua haujlwm ntawm PCB pawg thawj coj saib yog qhov zoo lossis tsis zoo.Hauv cov txheej txheem tsim ntawm PCB, kev xaim feem ntau muaj peb thaj tsam ntawm kev faib.
Ua ntej yog daim ntaub los ntawm, uas yog qhov tseem ceeb tshaj plaws rau kev tsim PCB.Yog hais tias cov kab tsis tau nteg los ntawm, yog li ntawd txhua qhov chaw yog ib txoj kab ya, nws yuav yog ib tug substandard board, yog li hais, tsis tau qhia.
Tom ntej no yog kev ua haujlwm hluav taws xob kom tau raws li qhov xav tau.Qhov no yog ib qho kev ntsuas seb puas yog cov ntawv luam tawm Circuit Board tsim nyog.Qhov no yog tom qab daim ntaub los ntawm, ua tib zoo kho cov hlua, kom nws tuaj yeem ua tiav cov khoom siv hluav taws xob zoo tshaj plaws.
Tom qab ntawd los ntawm kev zoo nkauj.Yog tias koj cov ntaub thaiv kab los ntawm, tsis muaj dab tsi cuam tshuam rau kev ua haujlwm hluav taws xob ntawm qhov chaw, tab sis saib yav dhau los tsis zoo, ntxiv rau cov yeeb yuj, paj, uas txawm tias koj cov hluav taws xob ua tau zoo npaum li cas, ntawm qhov muag ntawm lwm tus lossis ib qho khib nyiab. .Qhov no ua rau muaj kev tsis yooj yim rau kev sim thiab kho.Cov hlua yuav tsum huv si thiab huv si, tsis crisscrossed yam tsis muaj kev cai.Cov no yog los xyuas kom meej qhov kev ua tau zoo ntawm hluav taws xob thiab ua tau raws li lwm tus neeg yuav tsum tau ua kom tiav rooj plaub, txwv tsis pub nws yog muab lub laub ua ntej tus nees.
Kev xaim raws li cov hauv qab no.
(1) Feem ntau, thawj zaug yuav tsum tau xaim hluav taws xob thiab cov kab hauv av kom ntseeg tau tias cov hluav taws xob ua haujlwm ntawm lub rooj tsavxwm.Nyob rau hauv cov kev txwv ntawm tej yam kev mob, sim ua kom dav lub hwj chim mov, av kab dav, nyiam dua wider tshaj lub hwj chim kab, lawv kev sib raug zoo yog: av kab> fais fab kab> teeb liab kab, feem ntau cov teeb liab kab dav: 0.2 ~ 0.3mm (txog 8-12mil), thinnest dav mus txog 0.05 ~ 0.07mm (2-3mil), cov kab hluav taws xob feem ntau yog 1.2 ~ 2.5mm (50-100mil).100 mil).Lub PCB ntawm digital circuits tuaj yeem siv los tsim ib lub voj voog ntawm cov kab hauv av dav, uas yog, tsim cov hauv av network siv (analog circuit hauv av tsis tuaj yeem siv li no).
(2) kev xaim ua ntej ntawm cov kev xav tau nruj dua ntawm txoj kab (xws li cov kab ntau zaus), cov khoom siv thiab cov khoom siv sab nraud yuav tsum raug zam kom tsis txhob nyob ib sab mus rau qhov sib luag, thiaj li tsis ua rau muaj kev cuam tshuam cuam tshuam.Yog tias tsim nyog, kev sib cais hauv av yuav tsum tau ntxiv, thiab cov xaim ntawm ob txheej uas nyob ib sab yuav tsum yog nyob rau ib leeg, sib npaug kom yooj yim tsim cov kab mob sib kis.
(3) oscillator plhaub grounding, lub moos kab yuav tsum luv li sai tau, thiab tsis tuaj yeem coj mus rau txhua qhov chaw.Lub moos oscillation Circuit Court hauv qab no, tshwj xeeb high-speed logic Circuit Court ib feem kom nce qhov chaw ntawm lub hauv av, thiab yuav tsum tsis txhob mus rau lwm yam teeb liab kab ua rau lub cheeb tsam ntawm hluav taws xob teb nyhav rau xoom;.
(4) kom deb li deb tau siv 45 ° quav thaiv, tsis txhob siv 90 ° quav, txhawm rau txo cov hluav taws xob ntawm cov teeb liab siab;(cov kev xav tau siab ntawm kab kuj tseem siv ob chav arc kab)
(5) cov kab teeb liab tsis tsim cov voj voog, xws li qhov tsis tuaj yeem, lub voj voog yuav tsum me me li sai tau;Cov kab teeb liab yuav tsum muaj ob peb lub qhov tau.
(6) cov kab tseem ceeb yog luv thiab tuab li ua tau, thiab ntawm ob sab nrog cov av tiv thaiv.
(7) los ntawm txoj kab ncaj nraim ntawm kev sib kis ntawm cov teeb liab rhiab thiab lub suab nrov nrov band teeb liab, siv "hauv av - teeb liab - av" txoj kev coj tawm.
(8) Cov cim tseem ceeb yuav tsum tau tshwj tseg rau cov ntsiab lus sim los pab txhawb kev tsim khoom thiab kev kuaj xyuas
(9) Tom qab cov schematic thaiv tiav, cov xaim yuav tsum tau kho kom zoo;Nyob rau tib lub sijhawm, tom qab thawj zaug kev txheeb xyuas network thiab DRC kos yog qhov tseeb, qhov chaw tsis muaj xov hlau rau hauv av filling, nrog rau thaj tsam loj ntawm cov txheej tooj liab rau hauv av, nyob rau hauv cov ntawv luam tawm Circuit Board tsis yog siv rau ntawm qhov chaw txuas nrog hauv av. hauv av.Los yog ua ib lub rooj tsavxwm multilayer, lub zog thiab hauv av txhua tus nyob hauv ib txheej.
PCB thaiv cov txheej txheem yuav tsum tau (tuaj yeem teeb tsa hauv cov cai)
(1) Kab
Feem ntau, lub teeb liab kab dav ntawm 0.3mm (12mil), lub hwj chim kab dav ntawm 0.77mm (30mil) los yog 1.27mm (50mil);nruab nrab ntawm txoj kab thiab kab thiab qhov kev ncua deb ntawm kab thiab lub ncoo yog ntau dua los yog sib npaug rau 0.33mm (13mil), daim ntawv thov tiag tiag, cov xwm txheej yuav tsum tau txiav txim siab thaum qhov kev ncua deb nce.
Cov xov hlau ceev yog siab, tuaj yeem txiav txim siab (tab sis tsis pom zoo) siv IC pins ntawm ob kab, kab dav ntawm 0.254mm (10mil), kab sib nrug tsis tsawg dua 0.254mm (10mil).Nyob rau hauv tshwj xeeb, thaum tus pins ntaus ntawv yog denser thiab nqaim dav, txoj kab dav thiab kab sib nrug yuav txo tau raws li qhov tsim nyog.
(2) Solder pads (PAD)
Solder ncoo (PAD) thiab qhov hloov pauv (VIA) cov kev cai yooj yim yog: txoj kab uas hla ntawm lub disk tshaj qhov txoj kab uas hla ntawm lub qhov yuav tsum siab tshaj 0.6 hli;Piv txwv li, lub hom phiaj tus pin resistors, capacitors thiab integrated circuits, thiab lwm yam., siv lub disk / qhov loj 1.6mm / 0.8mm (63mil / 32mil), sockets, pins thiab diodes 1N4007, thiab lwm yam, siv 1.8mm / 1.0mm (71mil / 39mil).Kev siv tswv yim, yuav tsum ua raws li qhov loj me ntawm cov khoom siv los txiav txim siab, thaum muaj, tuaj yeem tsim nyog rau qhov loj ntawm lub ncoo.
PCB board tsim tivthaiv mounting aperture yuav tsum loj dua qhov tseeb qhov loj ntawm cov khoom siv pins 0.2 ~ 0.4mm (8-16mil) los yog li ntawd.
(3) tshaj qhov (VIA)
Feem ntau 1.27mm / 0.7mm (50mil / 28mil).
Thaum cov cua sov yog qhov siab, qhov loj tshaj plaws tuaj yeem raug txo kom tsim nyog, tab sis yuav tsum tsis txhob muaj me me, 1.0mil / 24mil / 24mil / 24mil / 24mil / 24mil / 24mil) tuaj yeem txiav txim siab.
(4) Qhov kev ncua deb ntawm lub ncoo, kab thiab vias
PAD thiab VIA: ≥ 0.3mm (12mil)
PAD thiab PAD: ≥ 0.3mm (12mil)
PAD thiab TRACK: ≥ 0.3mm (12mil)
TRACK thiab TRACK: ≥ 0.3mm (12mil)
Nyob rau hauv siab dua.
PAD thiab VIA: ≥ 0.254mm (10mil)
PAD thiab PAD: ≥ 0.254mm (10mil)
PAD thiab TRACK: ≥ 0.254mm (10mil)
TRACK thiab TRACK: ≥ 0.254mm (10mil)
7: Kev ua kom zoo tshaj plaws thiab silkscreen
"Tsis muaj qhov zoo tshaj plaws, tsuas yog zoo dua"!Txawm tias koj khawb ntau npaum li cas rau hauv kev tsim, thaum koj ua tiav daim duab, ces mus saib, koj tseem yuav xav tias ntau qhov chaw tuaj yeem hloov kho.Qhov kev tsim qauv dav dav yog tias nws yuav siv sijhawm ntev li ob zaug txhawm rau txhim kho cov xov hlau zoo li nws ua rau kev xaim thawj zaug.Tom qab xav tias tsis muaj qhov chaw hloov kho, koj tuaj yeem nteg tooj liab.Copper nteg feem ntau nteg hauv av (ua tib zoo saib xyuas qhov sib cais ntawm analog thiab digital hauv av), ntau txheej board kuj yuav tsum tau nteg lub hwj chim.Thaum rau silkscreen, ceev faj kom tsis txhob raug thaiv los ntawm lub cuab yeej lossis tshem tawm los ntawm lub qhov thiab lub ncoo.Nyob rau tib lub sij hawm, tus tsim yog saib squarely ntawm cov khoom sab, lo lus nyob rau hauv qab txheej yuav tsum tau ua daim iav duab ua, thiaj li tsis mus confuse theem.
8: Network, DRC kuaj thiab kuaj qauv
Tawm ntawm lub teeb kos duab ua ntej, feem ntau yuav tsum tau kuaj xyuas, txhua lub tuam txhab yuav muaj lawv tus kheej Daim Ntawv Teev Npe, suav nrog cov hauv paus ntsiab lus, kev tsim, kev tsim khoom thiab lwm yam kev xav tau.Cov hauv qab no yog ib qho kev taw qhia los ntawm ob lub ntsiab xyuas kev ua haujlwm muab los ntawm software.
9: Tso tawm lub teeb painting
Ua ntej lub teeb kos duab tso zis, koj yuav tsum xyuas kom meej tias cov veneer yog qhov tseeb version uas tau ua tiav thiab ua tau raws li cov qauv tsim.Lub teeb kos duab tso zis cov ntaub ntawv yog siv rau lub rooj tsavxwm Hoobkas los ua lub rooj tsavxwm, lub Hoobkas stencil los ua cov stencil, lub vuam Hoobkas ua cov txheej txheem cov ntaub ntawv, thiab lwm yam.
Cov ntaub ntawv tso zis yog (siv plaub txheej pawg thawj coj ua piv txwv)
1).Txheej txheej: yog hais txog cov txheej txheem teeb liab, feem ntau yog xaim.
Lub npe L1, L2, L3, L4, qhov twg L sawv cev rau txheej txheej txheej txheej.
2).Silk-screen txheej: hais txog cov ntaub ntawv tsim rau kev ua cov ntaub ntawv lo lo ntxhuav-kev tshuaj ntsuam hauv qib, feem ntau cov txheej txheem saum toj thiab hauv qab muaj cov khoom siv lossis cov ntaub ntawv logo, yuav muaj txheej txheej saum toj kawg nkaus-kev tshuaj ntsuam thiab hauv qab txheej silk-screening.
Lub npe: Cov txheej saum toj kawg nkaus yog lub npe SILK_TOP ;cov txheej hauv qab yog npe SILK_BOTTOM .
3).Solder resist txheej: yog hais txog cov txheej txheem tsim cov ntaub ntawv uas muab cov ntaub ntawv ua haujlwm rau cov roj ntsuab txheej.
Lub npe: Cov txheej saum toj kawg nkaus muaj npe SOLD_TOP;cov txheej hauv qab yog lub npe SOLD_BOTTOM.
4).Stencil txheej: yog hais txog qib nyob rau hauv cov ntaub ntawv tsim uas muab cov ntaub ntawv ua tiav rau cov txheej txheej txheej.Feem ntau, nyob rau hauv rooj plaub uas muaj SMD cov cuab yeej ntawm ob sab saum toj thiab hauv qab txheej, yuav muaj stencil sab saum toj txheej thiab stencil hauv qab txheej.
Lub npe: Cov txheej saum toj kawg nkaus yog lub npe PASTE_TOP ;cov txheej hauv qab yog lub npe PASTE_BOTTOM.
5).Laum txheej (muaj 2 cov ntaub ntawv, NC DRILL CNC drilling cov ntaub ntawv thiab DRILL DRAWING drilling daim duab)
npe NC DRILL thiab DRILL DRAWING feem.
10: Lub teeb duab saib xyuas
Tom qab cov khoom siv hluav taws xob teeb pom kev zoo rau lub teeb pom kev tshuaj xyuas, Cam350 qhib thiab luv Circuit Court thiab lwm yam ntawm daim tshev ua ntej xa mus rau pawg thawj coj saib xyuas lub Hoobkas, tom qab ntawd kuj yuav tsum tau ua tib zoo saib xyuas cov board engineering thiab cov lus teb rau cov teeb meem.
11: Cov ntaub ntawv PCB board(Gerber light painting information + PCB board yuav tsum + sib dhos board daim duab)
12: PCB board Hoobkas engineering EQ kev pom zoo(board engineering thiab teeb meem teb)
13: PCBA tso tawm cov ntaub ntawv tso tawm(cov ntaub ntawv stencil, qhov chaw me ntsis tus lej daim ntawv qhia, cov ntaub ntawv sib koom ua ke)
Ntawm no txhua qhov kev ua haujlwm ntawm qhov project PCB tsim tiav
PCB tsim yog ib txoj haujlwm ntxaws heev, yog li tus qauv tsim yuav tsum tau ua tib zoo saib xyuas thiab ua siab ntev, ua tib zoo xav txog txhua yam ntawm cov xwm txheej, suav nrog cov qauv tsim los coj mus rau hauv tus account ntawm kev tsim khoom ntawm kev sib dhos thiab kev ua haujlwm, thiab tom qab ntawd los pab txhawb kev saib xyuas thiab lwm yam teeb meem.Tsis tas li ntawd, kev tsim qauv ntawm qee tus cwj pwm ua haujlwm zoo yuav ua rau koj tus qauv tsim tsim nyog, tsim kom muaj txiaj ntsig zoo dua, kev tsim khoom yooj yim dua thiab ua haujlwm zoo dua.Kev tsim qauv zoo siv hauv cov khoom siv niaj hnub, cov neeg siv khoom kuj yuav muaj kev ntseeg siab thiab ntseeg siab.
Post lub sij hawm: May-26-2022