Cov txheej txheem tsim PCB yooj yim yog raws li hauv qab no:

Kev npaj ua ntej → PCB tsim qauv list daim ntawv teev npe → teeb tsa txoj cai layout PCB teeb tsa → thaiv kab → thaiv kab hluav taws xob ua kom zoo dua qub thiab cov ntxaij vab tshaus → network thiab DRC tshuaj xyuas thiab teeb tsa qauv → teeb duab teeb tsa → teeb duab teeb duab → PCB tsim khoom/pov thawj cov ntaub ntawv → PCB pawg thawj coj saib lub Hoobkas qhov project EQ kev lees paub → patch cov ntaub ntawv tso tawm → qhov ua tiav.

1: Kev npaj

Qhov no suav nrog kev npaj pob qiv tsev qiv ntawv thiab kos duab. Ua ntej PCB tsim, we should first prepare the logic package of schematic SCH and the package library of PCB. Cov tsev qiv ntawv pob tuaj yeem tuaj nrog PADS, tab sis nws nyuaj rau nrhiav cov tsev qiv ntawv tsim nyog feem ntau. Nws yog qhov zoo tshaj los ua koj tus kheej lub tsev qiv ntawv pob khoom raws li tus txheej txheem cov ntaub ntawv loj ntawm cov cuab yeej xaiv. In principle, the PCB packaging library should be done first, and then the SCH logic packaging should be done. PCB packaging library has high requirements, which directly affects the board installation; SCH logical packaging requirements are relatively loose, as long as the definition of pin attributes and the corresponding relationship with PCB packaging on the line. PS: Nco tseg cov pins zais hauv cov tsev qiv ntawv txheem. Tom qab ntawd yog cov qauv tsim, npaj ua PCB tsim.

2. PCB qauv tsim

Hauv cov kauj ruam no, raws li lub rooj tsav xwm hauv Circuit Court loj thiab qhov chaw ua haujlwm, PCB pawg thawj coj tau kos rau hauv PCB tsim ib puag ncig, thiab cov khoom sib txuas, cov nyees khawm/hloov, ntsia hlau qhov, sib dhos qhov thiab lwm yam tau muab tso raws li qhov xav tau. Thiab ua tib zoo txiav txim siab thiab txiav txim thaj chaw thaiv thiab thaj chaw tsis muaj kab (xws li ntau npaum li cas ntawm lub qhov ntsia hlau nyob ib puag ncig thaj tsam tsis thaiv).

3: qhia cov lus network

Nws raug nquahu kom xa cov lus net mus rau hauv pawg thawj coj ua ntej. Import a board enclosure in DXF format or EMN format

4: Rule setting

Cov cai tsim nyog tuaj yeem teeb tsa raws li PCB tsim tshwj xeeb. Cov kev cai no yog PADS tus tswj hwm kev txwv, uas tuaj yeem siv los txwv txoj kab dav thiab kev sib nrug zoo ntawm txhua qhov chaw hauv cov txheej txheem tsim. Cov cheeb tsam tsis ua raws cai yog cim los ntawm DRC Cov cim thaum lub sij hawm QHIA DRC xeem.

Kev teeb tsa txoj cai dav dav tau muab tso ua ntej qhov teeb tsa, vim tias qee zaum qee qhov kev tawm suab xav tau ua kom tiav thaum tsim, yog li cov cai yuav tsum tau teeb tsa ua ntej FANout. Thaum txoj haujlwm tsim qauv loj dua, kev tsim qauv tuaj yeem ua tiav ntau dua. Nco tseg: cov cai tau teeb tsa rau kev tsim qauv zoo dua thiab nrawm dua, ua lwm yam, kom yooj yim ntawm cov tsim qauv. Cov Chaw Cuam Tshuam yog: 1. Txoj kab dav dav/kab sib nrug rau cov cim sib xws. Xaiv thiab teeb lub qhov. 3. Teeb kab dav thiab xim ntawm cov cim tseem ceeb thiab cov khoom siv fais fab. 4. Pawg Txheej Txheem Txheej Txheem.

5: PCB txheej txheem

Yuav tsum tau them nyiaj tshwj xeeb rau, qhov chaw ntawm cov khoom, cov khoom siv yuav tsum raug txiav txim siab thaum qhov loj me (hauv cheeb tsam thiab qhov siab) thiab txoj haujlwm sib txheeb ntawm cov khoom siv, kom ntseeg tau tias cov khoom siv hluav taws xob thiab tsim cov khoom siv hluav taws xob hauv Circuit board yooj yim thiab ua tau. pw ua ke tib lub sijhawm, yuav tsum yog nyob ntawm qhov ua kom ntseeg tau cov hauv paus ntsiab lus los xav txog, tsim nyog hloov khoom siv, ua kom huv si thiab zoo nkauj, Piv txwv li, tib lub cuab yeej yuav tsum tau muab tso kom zoo thiab nyob rau tib qho kev taw qhia, tsis yog “kis ntawm qhov xwm txheej”. Cov kauj ruam no txhawj xeeb txog qhov nyuaj ntawm pawg thawj coj saib daim duab thiab qib txuas txuas ntxiv, xav siv kev siv zog ntau los txiav txim siab li ntawd. Thaum teeb tsa, tuaj yeem ua thawj qhov txuas ua ntej mus rau qhov chaw tsis txaus ntseeg, kev txiav txim siab txaus.

6: cev

Kev xaim hluav taws xob yog txheej txheem tseem ceeb tshaj plaws hauv PCB tsim. Qhov no yuav cuam tshuam ncaj qha rau kev ua haujlwm ntawm PCB pawg thawj coj. Hauv cov txheej txheem ntawm PCB tsim, thaiv feem ntau muaj peb qib kev faib: thawj yog kev faib khoom, uas yog qhov xav tau tshaj plaws ntawm PCB tsim. Yog tias kab tsis yog daim ntaub, tau txais txhua qhov chaw yog ya kab, nws yuav yog lub rooj tsav xwm tsis tsim nyog, tuaj yeem hais tias tsis muaj kev nkag mus.

Qhov thib ob yog kev txaus siab ntawm kev ua haujlwm hluav taws xob. Nov yog tus txheej txheem ntsuas seb daim ntawv luam tawm Circuit board puas tsim nyog. Qhov no yog tom qab kev faib khoom, ua tib zoo kho cov thaiv, kom nws tuaj yeem ua tiav qhov ua tau zoo tshaj plaws hluav taws xob. Tom qab ntawd muaj kev zoo nkauj. Yog tias koj daim ntaub thaiv tau txuas nrog, kuj tsis muaj qhov cuam tshuam rau kev ua haujlwm ntawm cov khoom siv hluav taws xob, tab sis saib yav dhau los tsis txaus ntseeg, ntxiv cov xim zoo nkauj, xim zoo nkauj, uas suav tias koj cov khoom siv hluav taws xob ua tau zoo li cas, tseem raug pov tseg hauv lwm qhov muag. Qhov no coj qhov tsis yooj yim rau kev sim thiab kho. Cov xov hlau yuav tsum ua kom zoo thiab zoo ib yam, tsis hla hla yam tsis muaj txoj cai. Tag nrho cov no yuav tsum ua tiav hauv cov ntsiab lus ntawm kev ua kom ntseeg tau kev ua haujlwm hluav taws xob thiab ua tau raws li lwm cov kev xav tau ntawm tus kheej, txwv tsis pub nws yog tso tseg lub ntsiab lus.

Kev thaiv hluav taws xob feem ntau yog ua raws li cov hauv paus ntsiab lus hauv qab no: (1) Feem ntau, cov kab hluav taws xob thiab cov xaim hauv av yuav tsum tau txuas ua ntej kom ntseeg tau tias qhov hluav taws xob ua tau zoo ntawm lub rooj tsav xwm hauv Circuit Court. Hauv qhov xwm txheej ntawm qhov xwm txheej tso cai, kom deb li deb tau kom nthuav dav qhov dav ntawm cov khoom siv hluav taws xob, hauv av xaim, cov av zoo tshaj plaws yog dav dua li kab hluav taws xob, lawv kev sib raug zoo yog: hauv av xaim> fais fab kab> teeb liab kab, feem ntau teeb liab kab dav yog: 0.2 ~ 0.3mm (kwv yees li 8-12mil), qhov dav nqaim mus txog 0.05 ~ 0.07mm (2-3mil), lub zog fais fab feem ntau yog 1.2 ~ 2.5mm (50-100mil). PCB ntawm digital Circuit tuaj yeem siv ua ib qho kev sib txuas nrog cov neeg ua haujlwm hauv av dav, uas yog, hauv av hauv ntiaj teb (cov khoom siv sib piv hauv av tsis tuaj yeem siv hauv txoj kev no). (2) in advance to the more strict requirements of the line (such as high frequency line) wiring, input and output side line should avoid adjacent parallel, so as not to produce reflection interference. Thaum tsim nyog, cov xaim av yuav tsum tau ntxiv kom cais tawm, thiab cov hlua ntawm ob txheej uas nyob ib sab yuav tsum tau muab sib dhos ib leeg, uas yog ib qho yooj yim los tsim cov kab mob sib kis ua ke. (3) the oscillator shell is grounded, and the clock line should be as short as possible, and it can’t be everywhere. Hauv qab lub moos oscillation Circuit, qhov tshwj xeeb kev kub ceev logic Circuit yuav tsum nce thaj tsam hauv av, thiab yuav tsum tsis txhob mus rau lwm cov kab teeb liab, yog li thaj tsam hluav taws xob ib puag ncig zoo li xoom;

(4) Siv 45 ° cov kab tawg kom deb li deb tau, tsis yog 90 ° txoj kab tawg, txhawm rau txo qis hluav taws xob ntawm cov teeb liab ntau zaus; (5) Txhua txoj kab teeb liab yuav tsum tsis tsim lub voj, yog tias zam tsis tau, lub voj yuav tsum me me li sai tau; Teeb liab kab hla lub qhov yuav tsum tsawg li sai tau; (6) Txoj kab tseem ceeb yuav tsum luv thiab tuab li sai tau, thiab yuav tsum tiv thaiv hauv av ntawm ob sab. (7) thaum xa cov teeb meem rhiab thiab suab nrov hauv lub suab qhia los ntawm cov kab hluav taws xob tiaj tus, nws yog qhov yuav tsum tau siv txoj hauv kev ntawm “kab hauv av – teeb liab – kab hauv av”. (8) Cov ntsiab lus ntsuas yuav tsum tau tshwj tseg rau cov cim tseem ceeb los pab txhawb kev tsim khoom thiab kev sim ntsuas. (9) Tom qab cov xov hluav taws xob tau ua tiav, thaiv yuav tsum tau ua kom zoo dua; Nyob rau tib lub sijhawm, tom qab kev txheeb xyuas thawj zaug hauv network thiab DRC txheeb xyuas qhov tseeb, cov xov hlau hauv av tau ntim rau hauv thaj tsam yam tsis muaj xov hlau, thiab thaj tsam tooj liab loj tau siv los ua xaim hauv av, thiab cov chaw tsis siv tau txuas nrog hauv av li av xaim ntawm daim ntawv luam tawm. Los yog ua kom nws muaj ntau txheej pawg thawj coj saib, lub zog siv hluav taws xob, cov kab hauv av txhua qhov nyob hauv ib txheej.

(1) Kab Feem ntau, kab teeb liab dav yog 0.3mm (12mil), thiab kab dav dav dav yog 0.77mm (30mil) lossis 1.27mm (50mil); Qhov kev ncua deb ntawm xaim thiab xaim thiab ntawm xaim thiab ncoo yuav tsum ntau dua lossis sib npaug li 0.33mm (13mil). Hauv daim ntawv thov, nws yuav tsum raug txiav txim siab kom nce qhov kev ncua deb thaum cov xwm txheej tso cai; Thaum cov kab hluav taws xob ntom ntom ntom siab, nws raug nquahu (tab sis tsis pom zoo) siv ob lub xov tooj ntawm IC pins. Qhov dav ntawm cov kab hluav taws xob yog 0.254mm (10mil), thiab qhov nrug nruab nrab ntawm cov kab hluav taws xob tsis tsawg dua 0.254mm (10mil). Hauv qhov xwm txheej tshwj xeeb, thaum tus pin ntawm lub cuab yeej ntom ntom thiab qhov dav yog nqaim, kab dav thiab kab sib nrug tuaj yeem tsim nyog. (2) PAD (PAD) PAD (PAD) thiab qhov hloov pauv qhov (VIA) qhov xav tau yooj yim yog: txoj kab uas hla ntawm daim disk ntau dua li txoj kab uas hla ntawm lub qhov ntau dua 0.6mm; Piv txwv, universal pin type resistors, capacitors thiab integrated circuits, siv disk/qhov loj 1.6mm /0.8mm (63mil/32mil), qhov (socket), tus pin thiab diode 1N4007, siv 1.8mm/1.0mm (71mil/39mil). Hauv daim ntawv thov, nws yuav tsum txiav txim siab raws li qhov loj me ntawm cov khoom siv tiag. Yog tias muaj cov xwm txheej, qhov loj ntawm lub ncoo tuaj yeem tsim nyog ntxiv. Qhov teeb tsa teeb tsa ntawm cov khoom tsim los ntawm PCB yuav tsum yog li 0.2 ~ 0.4mm (8-16mil) loj dua qhov loj me ntawm cov pins ntawm cov khoom. (3) Qhov perforation (VIA) feem ntau yog 1.27mm/0.7mm (50mil/28mil); Thaum cov kab hluav taws xob ntom ntom siab, qhov loj me tuaj yeem txo kom tsim nyog, tab sis tsis tsawg dhau, tuaj yeem txiav txim siab 1.0mm/0.6mm (40mil/24mil). PAD thiab VIA: ≥ 0.3mm (12mil) ≥ 0.3mm (12mil) PAD thiab VIA: ≥ 0.254mm (10mil) PAD thiab TRACK: ≥ 0.254mm (10mil) PAD thiab TRACK: ≥ 0.254mm (10mil) Taug qab thiab taug qab: ≥ 0.254mm (10mil)

7: thaiv kev ua kom zoo dua thiab tshuaj ntsuam luam ntawv

“Tsis muaj qhov zoo tshaj plaws, tsuas yog zoo dua”! Tsis muaj teeb meem ntau npaum li cas koj tso rau hauv tus tsim, thaum koj ua tiav, saib nws dua, thiab koj tseem yuav xav tias koj tuaj yeem hloov pauv ntau yam. Txoj cai tsim dav dav ntawm tus ntiv tes xoo yog qhov pom kev pom zoo siv sijhawm ob zaug ntev npaum li thawj zaug thaiv. Tom qab xav tias tsis muaj dab tsi xav tau hloov pauv, koj tuaj yeem tso tooj liab. Kev tso tooj liab feem ntau tso rau hauv av xaim (xyuam xim rau kev sib cais ntawm cov analog thiab digital hauv av), pawg thawj coj ntau tus neeg kuj tseem yuav tsum tau tso lub zog. Rau kev luam ntawv, peb yuav tsum xyuam xim kom tsis txhob raug thaiv los ntawm lub cuab yeej lossis tshem tawm los ntawm lub qhov thiab ncoo. Nyob rau tib lub sijhawm, tsim kom pom lub ntsej muag tivthaiv ntu, hauv qab ntawm lo lus yuav tsum yog daim iav ua tiav, yog li tsis txhob cuam tshuam qib.

8: Network, DRC thiab kev tshuaj xyuas cov qauv

Ua ntej pleev xim rau, nws feem ntau yog yuav tsum tau Kos. Txhua lub tuam txhab muaj nws tus kheej Daim Ntawv Teev Npe, suav nrog cov cai ntawm txoj cai, tsim qauv, tsim khoom thiab lwm yam txuas. Cov hauv qab no yog kev taw qhia rau ob qhov kev tshuaj xyuas tseem ceeb muab los ntawm software. DRC xyuas:

9: tso zis teeb duab

Ua ntej tso tawm ntawm cov xim tha xim, xyuas kom tseeb tias cov veneer yog qhov tshiab tshaj plaws uas tau ua tiav thiab ua tau raws li qhov xav tau tsim. Cov ntaub ntawv tso tawm ntawm lub teeb tha xim yog siv rau kev tsim khoom ntawm pawg thawj coj saib hauv lub phaj phaj, tsim cov hlau hlau hauv cov hlau nqa lub Hoobkas, thiab cov txheej txheem txheej txheem tsim khoom hauv vuam Hoobkas.

The output files are as follows (take the four-layer board as an example) : 1). Wiring layer: refers to the conventional signal layer, mainly wiring. Lawv muaj npe hu ua L1, L2, L3, THIAB L4, qhov twg L sawv cev rau txheej txheej thaiv txheej.

2). Txheej txheej txheej luam ntawv: hais txog txheej txheej hauv daim ntawv tsim qauv uas muab cov ntaub ntawv rau kev ua cov luam ntawv. Feem ntau, yuav muaj kev tshuaj ntsuam sab saum toj thiab luam ntawv hauv qab yog tias muaj cov cuab yeej lossis cov cim nyob rau txheej saum thiab hauv qab. Npe: txheej sab saum toj muaj npe SILK_TOP; Lub hauv paus lub npe yog SILK_BOTTOM.