Kom ua tiav zooPCB tsim, ntxiv rau tag nrho cov kev sib tw hauv kev sib tw, cov cai rau kab dav thiab spacing kuj tseem ceeb heev. Yog vim tias LINE davth thiab spacing txiav txim siab qhov kev ua tau zoo thiab kev ruaj ntseg ntawm Circuit Court Board. Yog li ntawd, kab lus no yuav muab cov lus qhia ntxaws ntxaws rau cov cai tsim qauv rau PCB kab dav thiab spacing.
Nws yog ib qho tseem ceeb kom nco ntsoov tias cov software teeb tsa yuav tsum yog teeb tsa kom raug thiab tsim qauv kev xaiv (DRC) yuav tsum tau ua haujlwm ua ntej kev sib tham. Nws raug nquahu kom siv 5Mil daim phiaj rau kev taug, thiab rau kev sib npaug 0mil daim phiaj tuaj yeem tsim raws li qhov xwm txheej.
PCB Kab Dav Cov Cai:
1.Routing yuav tsum ua ntej lubMuaj peev xwm tsim khoomntawm lub Hoobkas. Paub meej tias cov chaw tsim khoom tsim nrog cov qhua tuaj noj mov thiab txiav txim siab lawv cov peev xwm ntau lawm. Yog tias tsis muaj kev cai tshwj xeeb yog muab los ntawm cov neeg siv khoom, xa mus rau cov qauv tsim qauv cuam tshuam rau kab dav.
2.Kev yuamCov qauv: raws li cov ntawv qhia boardness thiab txheej uas yuav tsum los ntawm cov qhua tuaj noj mov, xaiv cov qauv tsim nyog. Teeb cov kab dav raws li cov qauv suav hauv cov qauv impedance. Cov kev cuam tshuam tsis sib xws suav nrog ib-xaus 50ω, 100ω, thiab lwm yam Nco ntsoov seb cov teeb liab 50- yuav tsum xav txog cov txheej uas nyob ib sab. Rau cov pcb txheej txheej stackups raws li siv hauv qab no.
3.as qhia nyob rau hauv daim duab hauv qab no, txoj kab dav yuav tsum tau ua kom tau raws li cov kev nqa khoom tam sim no. Feem ntau, raws li kev paub dhau los thiab xav txog cov kev sib tw sib txawv, cov lus qhia hauv qab no: rau qhov kub ntawm 1Omil kab dav tuaj yeem tswj hwm kev tshaj 1a; Rau 0.5oz tooj liab thickness, ib 40mil kab dav tuaj yeem tswj tau ntau dhau ntawm 1a.
4. Rau cov laj thawj tsim dav dav, cov kab dav yuav tsum tau tswj hwm saum toj kawg 4mil, uas tuaj yeem ua tau raws li kev tsim khoom lag luam ntawm feem ntauPcb ManufacturersCov. Rau cov qauv tsim uas impedance tswj tsis tsim nyog (feem ntau ntawm 2-txheej boards), tsim kab kab dav saum toj saud 8mil tuaj yeem pab txo tus nqi tsim khoom ntawm PCB.
5. Xav txog qhovTooj liab Thicknessteeb tsa txheej sib raug nyob hauv txoj kev. Nqa 2oz tooj piv txwv, sim tsim qauv kab dav saum toj no 6mil. Lub thicker tus tooj liab, tus dav txoj kab dav. Nug rau kev tsim khoom tsim nyog ntawm lub hoobkas rau cov tooj liab tuab qauv tuab tsis tsim.
6. Rau BGA tsim nrog 0.5 hli thiab 0.65mm pitches, ib txoj kab dav dav yuav siv tau nyob rau qee thaj chaw (tuaj yeem tswj hwm los ntawm cov cai tsim).
7. HDI BoardKev tsim qauv tuaj yeem siv cov kab 3mil kab dav. Rau cov qauv tsim nrog kab dav hauv qab 3mil, nws yog qhov tsim nyog kom paub meej tias cov qhua tuaj noj mov, raws li qee cov kab uas muaj peev xwm ntawm 2mil kab dav (tuaj yeem tswj hwm los ntawm cov cai tsim). Thinner kab dav ntxiv tsim cov nqi tsim khoom thiab txuas ntxiv lub voj voog ntau lawm.
8. Yog tias qhov chaw muaj tsawg, txoj kab dav yuav tsum tau tswj hwm tshaj 8mil.
9. RF cim yuav tsum tau daws nrog cov kab thicker, nrog siv rau txheej txheej nyob ib sab thiab impedance tswj ntawm 50ω. RF cov cim yuav tsum tau ua rau ntawm cov khaubncaws sab nraud povtseg, zam kev txheej sab hauv thiab txo kev siv vias los yog txheej hloov. RF cov cim yuav tsum tau nyob ib puag ncig los ntawm cov txheej txheem av, nrog cov txheej txheej ua kom zoo dua yog cov tub tooj liab gnd.
PCB Wiring Kab Txuas Kev Cai
1. Cov xaim yuav tsum ua kom tau raws li lub peev xwm ntawm lub Hoobkas yuav tsum ua kom tau cov peev xwm ntau lawm, feem ntau tswj ntawm 4 lab lossis sab saud. Rau BGA cov qauv tsim nrog 0.5 hli lossis 0.65mm spacing, ib kab kev sib nrug ntawm 3.5 lab tuaj yeem siv nyob rau qee thaj chaw. HDI tsim tuaj yeem xaiv txoj kab sib nrug ntawm 3 lab. Cov qauv tsim hauv qab 3 lab yuav tsum paub meej tias cov khoom siv tsim ntau lawm ntawm cov khoom siv tsim khoom nrog cov qhua tuaj noj mov. Qee cov tuam ntxhab muaj cov muaj peev xwm ntau lawm ntawm 2 mil (tswj hauv cov chaw tsim tshwj xeeb).
2. Ua ntej tsim txoj cai kab kab, xav txog cov tooj liab tuab yuav tsum tau ntawm tus qauv. Rau 1 ooj tooj liab sim ua kom muaj kev deb ntawm 4 lab lossis saum toj no, thiab rau 2 ooj tooj liab, sim ua kom muaj kev ncua deb ntawm 6 lab lossis siab dua.
3. Tus qauv sib nrug rau cov teeb tsa cov teeb liab sib txawv yuav tsum tau teeb tsa raws li kev cuam tshuam kev cuam tshuam kom ntseeg tau tias kev sib tw kom zoo.
4. Cov xov hlau yuav tsum tau khaws cia kom deb ntawm pawg thawj coj thiab sim ua kom ntseeg tau tias cov thawj coj yuav muaj av (gnd). Khaws qhov kev ncua deb ntawm cov cim taw qhia thiab cov chaw zov me nyuam saum toj 40 lab.
5. Lub zog txheej teeb yuav tsum muaj qhov deb ntawm tsawg kawg 10 lab los ntawm gnd txheej. Qhov kev ncua deb ntawm lub zog thiab lub dav hlau tooj liab yuav tsum yog tsawg kawg 10 lab. Rau qee qhov ICS (xws li BGAs) nrog qhov sib nrug me me, qhov kev ncua deb tuaj yeem hloov kho kom tsim nyog rau qhov tsawg kawg 6 mil (tswj hauv cov chaw tsim tshwj xeeb).
6. Kev qhia npe zoo li cov moos zoo li moos, cov cim sib txawv, thiab analog cov cim yuav tsum muaj 3 zaug ntawm qhov dav (3w) lossis tau nyob ib puag ncig hauv av (gnd) cov dav hlau. Qhov kev ncua deb ntawm cov kab yuav tsum khaws cia ntawm 3 zaug ntawm kab dav kom txo cov Crosstalk. Yog tias qhov kev ncua deb ntawm cov chaw nruab nrab ntawm ob kab tsis tsawg dua 3 zaug ntawm cov kab hluav taws xob tsis muaj kev cuam tshuam, uas yog lub npe hu ua 3W hauv paus ntsiab lus.
7.Adjacalide txheej paib yuav tsum zam tsis txhob sib txuas xov. Cov kev coj ua yuav tsum tsim cov qauv orthogonal los txo cov crosstalcle tsis tseem ceeb.
8. Thaum cov kev taug ntawm txheej saum npoo av, khaws qhov deb ntawm tsawg kawg 1mm los ntawm mounting qhov los tiv thaiv cov kab luv luv lossis kab ntuag vim kev teeb meem kev ntxhov siab. Thaj chaw ib ncig ntawm cov ntsia hlau qhov yuav tsum tau cia kom pom tseeb.
9. Thaum faib cov txheej txheem hluav taws xob, tsis txhob muaj kev sib cais ntau dhau. Hauv ib lub dav hlau hluav taws xob, sim kom tsis txhob muaj ntau dua 5 lub zog hluav taws xob, nyiam dua li ntawm kev pheej hmoo nqa hla lub dav hlau sib cais ntawm cov txheej txheem sib cais ntawm cov txheej txheem sib cais
10.Power cov kev faib tawm dav hlau yuav tsum muab khaws cia kom ua tau li qub tau, tsis muaj kev sib cais ntev lossis dumbbell-kom zam dhau qhov xwm txheej uas xaus rau qhov xaus thiab nruab nrab yog me me. Cov peev txheej tam sim no yuav tsum tau xam raws li qhov nqaim nqaim ntawm lub zog tooj liab dav hlau.
Shenzhen Anke PCB Co., Ltd
2023-9-16
Lub Sijhawm Post: Sep-19-2023
