Muaj ntau tus kws ua haujlwm tsis paub dhau los hauv kev lag luam hluav taws xob.Tus tsim PCB boards feem ntau muaj ntau yam teeb meem vim tsis quav ntsej tej yam kev kuaj nyob rau hauv lub tom ntej theem ntawm kev tsim, xws li tsis txaus kab dav, tivthaiv daim ntawv lo lo lo ntxhuav npo luam ntawv ntawm lub qhov ntawm lub qhov, qhov (socket) dhau ze, lub teeb liab loops, thiab lwm yam. Yog li ntawd. , teeb meem hluav taws xob lossis cov txheej txheem teeb meem tshwm sim, thiab hauv qhov xwm txheej hnyav, lub rooj tsavxwm yuav tsum tau rov luam dua, ua rau cov khoom pov tseg.Ib qho ntawm cov kauj ruam tseem ceeb tshaj nyob rau theem tom ntej ntawm kev tsim PCB yog kev tshuaj xyuas.
Muaj ntau cov ntsiab lus hauv kev kuaj xyuas tom qab ntawm PCB board tsim:
1. Cov khoom ntim khoom
(1) Pad spacing
Yog tias nws yog ib lub cuab yeej tshiab, koj yuav tsum kos lub pob khoom ntawm koj tus kheej kom paub meej qhov sib nrug.Qhov sib nrug ntawm lub ncoo ncaj qha cuam tshuam rau kev sib txuas ntawm cov khoom.
(2) Ntawm qhov loj me (yog tias muaj)
Rau cov khoom siv plug-in, qhov loj ntawm lub qhov ntawm lub qhov yuav tsum muaj cov npoo txaus, thiab nws feem ntau tsim nyog kom tseg tsis pub tsawg dua 0.2 hli.
(3) Qhia txog silk screen printing
Cov txheej txheem tshuaj ntsuam luam ntawv ntawm lub cuab yeej zoo dua li qhov loj me kom ntseeg tau tias cov cuab yeej tuaj yeem ntsia tau zoo.
2. PCB board layout
(1) IC yuav tsum tsis txhob nyob ze rau ntawm ntug ntawm lub rooj tsavxwm.
(2) Cov khoom siv ntawm tib lub module Circuit Court yuav tsum muab tso ze rau ib leeg
Piv txwv li, lub decoupling capacitor yuav tsum nyob ze rau lub hwj huam mov tus pin ntawm IC, thiab cov khoom siv uas ua rau tib lub zog ua haujlwm yuav tsum tau muab tso rau hauv ib cheeb tsam ua ntej, nrog cov txheej ntshiab kom ntseeg tau tias kev ua haujlwm.
(3) Npaj qhov chaw ntawm lub qhov (socket) raws li kev teeb tsa tiag tiag
Lub qhov (sockets) tag nrho yog coj mus rau lwm cov modules.Raws li qhov tseeb qauv, rau qhov yooj yim ntawm installation, lub hauv paus ntsiab lus ntawm kev sib thooj feem ntau yog siv los npaj txoj hauj lwm ntawm lub qhov (socket), thiab feem ntau yog nyob ze rau ntawm ntug ntawm lub rooj tsavxwm.
(4) Ua tib zoo saib cov kev taw qhia ntawm lub qhov (socket).
Lub qhov (sockets) yog tag nrho cov kev taw qhia, yog tias qhov kev taw qhia yog thim rov qab, cov hlau yuav tsum tau kho.Rau lub qhov (socket) tiaj tus, cov kev taw qhia ntawm lub qhov (socket) yuav tsum mus rau sab nraud ntawm lub rooj tsavxwm.
(5) Yuav tsum tsis muaj cov cuab yeej siv hauv cheeb tsam Keep Out
(6) Lub hauv paus ntawm kev cuam tshuam yuav tsum tau ceev kom deb ntawm cov hluav taws xob rhiab heev
High-speed signals, high-speed moos los yog high-tam sim no switching signals yog tag nrho cov qhov chaw ntawm kev cuam tshuam thiab yuav tsum tau ceev kom deb ntawm rhiab circuits, xws li reset circuits thiab analog circuits.Flooring tuaj yeem siv los cais lawv.
3. PCB board thaiv kab
(1) Kab dav loj
Txoj kab dav yuav tsum raug xaiv raws li tus txheej txheem thiab tam sim no nqa peev xwm.Cov kab me me dav tsis tuaj yeem me dua li cov kab me me dav ntawm PCB board chaw tsim khoom.Nyob rau tib lub sijhawm, lub peev xwm nqa tam sim no tau lees paub, thiab cov kab dav dav uas tsim nyog feem ntau xaiv ntawm 1mm / A.
(2) Cov kab teeb liab sib txawv
Rau cov kab sib txawv xws li USB thiab Ethernet, nco ntsoov tias cov kab yuav tsum muaj qhov sib npaug ntawm qhov ntev, sib npaug, thiab nyob rau tib lub dav hlau, thiab qhov sib nrug yog txiav txim siab los ntawm impedance.
(3) Ua tib zoo saib rau txoj kev rov qab los ntawm cov kab siab ceev
High-speed kab yog nquag tsim hluav taws xob electromagnetic.Yog tias thaj chaw tsim los ntawm txoj kev routing thiab txoj kev xa rov qab yog qhov loj heev, ib qho kev tig kauj yuav raug tsim kom tawg electromagnetic cuam tshuam, raws li qhia hauv daim duab 1. Yog li ntawd, thaum routing, xyuam xim rau txoj kev rov qab los ntawm nws.Lub rooj tsav xwm ntau txheej yog muab nrog lub zog txheej thiab lub dav hlau hauv av, uas tuaj yeem daws qhov teeb meem no zoo.
(4) Ua tib zoo mloog cov kab teeb liab analog
Cov kab teeb liab analog yuav tsum raug cais tawm ntawm cov teeb liab digital, thiab cov xaim yuav tsum zam kom deb li deb tau los ntawm qhov cuam tshuam (xws li moos, DC-DC fais fab mov), thiab cov xaim yuav tsum luv li sai tau.
4. Electromagnetic compatibility (EMC) thiab teeb liab kev ncaj ncees ntawm PCB boards
(1) Termination kuj
Rau cov kab hluav taws xob siab lossis cov kab teeb liab digital uas muaj cov kab ntau zaus thiab cov kab ntev ntev, nws yog qhov zoo dua los muab qhov sib txuam resistor hauv series thaum kawg.
(2) Cov kab hluav taws xob input txuas txuas nrog rau ib qho me me capacitor
Nws yog qhov zoo dua los txuas cov teeb liab kab tawm tswv yim los ntawm qhov chaw nyob ze ntawm lub interface thiab txuas ib qho me me picofarad capacitor.Qhov loj ntawm lub capacitor yog txiav txim siab raws li lub zog thiab zaus ntawm lub teeb liab, thiab yuav tsum tsis txhob loj dhau, txwv tsis pub lub teeb liab kev ncaj ncees yuav raug cuam tshuam.Rau cov teeb liab qis qis, xws li cov tswv yim tseem ceeb, lub capacitor me me ntawm 330pF tuaj yeem siv tau, raws li pom hauv daim duab 2.
Daim duab 2: PCB board design_input teeb liab kab txuas nrog me me capacitor
Daim duab 2: PCB board design_input teeb liab kab txuas nrog me me capacitor
(3) Muaj peev xwm tsav tsheb
Piv txwv li, lub teeb liab hloov nrog lub zog tsav tam sim no tuaj yeem tsav los ntawm triode;rau lub tsheb npav uas muaj ntau tus kiv cua-tso tawm, tuaj yeem ntxiv tsis tau.
5. Screen luam ntawv ntawm PCB board
(1) Board lub npe, sijhawm, PN code
(2) Labeling
Kos cov pins lossis cov cim tseem ceeb ntawm qee qhov cuam tshuam (xws li arrays).
(3) Daim ntawv lo
Cov ntawv sau cov khoom yuav tsum muab tso rau hauv cov haujlwm tsim nyog, thiab cov ntawv tuab tuab tuaj yeem muab tso rau hauv pawg.Ceev faj tsis txhob muab tso rau hauv txoj hauj lwm ntawm lub via.
6. Kos taw tes ntawm PCB board
Rau PCB boards uas yuav tsum tau siv lub tshuab soldering, ob mus rau peb Mark cov ntsiab lus yuav tsum tau ntxiv.
Post lub sij hawm: Aug-11-2022