PCB Ceev Ceev yog dab tsi?
Peb hu PCB nrog lub zaus xa xov tooj cua siab dua 1GHz ua lub rooj tsavxwm luam tawm ceev ceev.
Cov txiaj ntsig ntawm kev siv cov PCBs ceev ceev yog dab tsi?
Txhawm rau txhim kho qhov zaus ntawm lub teeb liab thiab daws qhov teeb meem EMI ntawm cov khoom siv hluav taws xob, cov PCBs ceev ceev tau tsim tawm. Tom qab tsim cov PCB ceev ceev tau txais kev vam meej zoo, nws qhov kev koom tes rau EMI tseem ceeb zuj zus. Yuav luag 60% ntawm cov teeb meem EMI tuaj yeem daws tau los ntawm cov PCBs ceev ceev.
Cov ntaub ntawv twg siv rau hauv cov PCBs ceev ceev?
Cov ntaub ntawv uas tiv taus cua sov, kev ua kom tawv, thiab zoo (kev ntseeg tau)
Cov ntaub ntawv nrog cov kev ntsuas Dk / Df ruaj khov (cov coefficient me me ntawm kev hloov pauv nrog zaus thiab ib puag ncig)
Cov ntaub ntawv uas muaj kev tswj hwm impedance zoo
Cov ntaub ntawv uas muaj qhov roughness tsawg ntawm cov ntawv ci tooj liab
Kev xaiv cov ntaub iav fiber nrog cov qhov me me tiaj tiaj yog qhov pom zoo.
Thaum tsim cov PCB ceev ceev, kuv yuav tsum xav txog cov lus qhia twg?
Muaj ob peb lub tswv yim ntawm kev tsim cov PCB ceev ceev tau piav qhia hauv qab no.
1) Siv cov software tsim qauv nrog cov kev xaiv siab heev
Cov kws ua haujlwm yuav tsum paub txog cov software tsim uas tuaj yeem muab cov kev xaiv siab heev. Cov cuab yeej software xav tau ntau yam ntxwv zoo heev kom thiaj li tsim tau cov PCBs ceev ceev hauv CAD software. Koj yuav tsum nkag siab zoo dua txog cov cuab yeej CAD muaj zog.
2) Kev khiav ceev ceev
Thaum nws los txog rau kev xa xov ceev ceev, cov neeg tsim qauv yuav tsum nkag siab txog cov cai ntawm kev xa xov yooj yim, suav nrog tsis txhob txiav cov txheej av thiab ua kom txoj kev xa xov luv luv. Yog li ntawd, thov tiv thaiv kev sib txuas lus hla qee qhov deb ntawm cov kab digital thiab tiv thaiv txhua yam uas yuav tsim kev cuam tshuam rau kev ncaj ncees ntawm lub teeb liab.
3) Kev tswj hwm impedance
Rau qee cov teeb liab ntawm kwv yees li 40-120 ohms, lawv xav tau kev sib phim impedance. Qhov kev sib phim impedance yam ntxwv yog qhia los ntawm antennas thiab ntau tus khub sib txawv.
Cov neeg tsim qauv yuav tsum nkag siab txog yuav ua li cas xam qhov dav ntawm txoj kev thiab qhov tsim nyog ntawm qhov impedance. Yog tias tus nqi impedance tsis raug, nws yuav muaj kev cuam tshuam loj heev rau lub teeb liab, uas tuaj yeem ua rau cov ntaub ntawv puas tsuaj.
4) Cov kab nrog qhov ntev sib phim
Muaj ntau kab nyob rau hauv lub tsheb npav nco ceev ceev thiab lub tsheb npav interface. Cov kab no tuaj yeem ua haujlwm ntawm qhov zaus siab heev, yog li cov teeb liab yuav tsum tau xa tib lub sijhawm los ntawm tus xa mus rau tus txais. Tsis tas li ntawd, nws xav tau ib qho feature hu ua qhov sib phim ntev. Yog li ntawd, cov qauv feem ntau txhais cov nqi kam rau siab uas yuav tsum tau sib phim rau qhov ntev.
5) Txo qhov cheeb tsam ntawm lub voj voog rov qab tam sim no
Cov neeg tsim PCB ceev ceev yuav tsum ua raws li cov cai yooj yim, xws li tsim ib txheej av txuas ntxiv thiab txo thaj tsam ntawm lub voj voog rov qab los ntawm kev ua kom zoo dua txoj kev rov qab los ntawm kev taw qhia, nrog rau kev tso ntau lub vias xaws.
Cov kev coj ua zoo tshaj plaws rau kev tsim cov PCBs ceev ceev yog dab tsi?
Cov txuj ci tsim PCB ceev ceev tau raug tswj hwm, uas ua kom muaj kev ncaj ncees ntawm lub teeb liab.
Cov ntaub ntawv ntawm cov PCBs ceev ceev tau raug xaiv kom raug kom ntseeg tau tias qhov ua tau zoo ntawm kev xa cov teeb liab.
Kev tswj hwm kev tsim khoom raug ua tiav. Cov ntsiab lus tswj hwm tseem ceeb thaum lub sijhawm tsim khoom yog qhov dav ntawm cov voj voog, qhov sib nrug ntawm txheej, vias plated nrog tooj liab, qhov tuab ntawm tooj liab ntawm cov voj voog, qhov tuab ntawm lub ntsej muag solder, thiab lwm yam.
Tus nqi ntawm kev muaj tus tswv yog dab tsi thaum nws los txog rau cov PCBs ceev ceev?
Cov yam hauv qab no yuav cuam tshuam rau tus nqi ntawm cov PCBs ceev ceev.
Cov khoom siv (cov khoom siv hauv qab, qhov tuab ntawm cov khoom siv, qhov tuab ntawm tooj liab)
Cov khoom siv tsim khoom siv
Qhov nyuaj ntawm kev tsim khoom
Cov kev xav tau ntawm cov neeg siv khoom
Txoj kev ntim khoom uas tau xaiv
Txoj kev xa khoom uas tau xaiv
Yuav Tsim PCB Ceev Li Cas?
Kev tsim PCB ceev ceev yog ib qho txheej txheem nyuaj uas yuav tsum tau xav txog tag nrho cov teeb liab, impedance, cov kab xa xov, thiab ntau lwm yam khoom siv. Cov ntsiab lus hauv qab no tuaj yeem muab qee qhov kev siv.
Siv cov multilayers rau kev xa xov kom raug.
Qhov luv dua ntawm cov hlau txuas ntawm cov pins ntawm cov khoom siv hluav taws xob ceev ceev, qhov zoo dua.
Siv cov av puag ncig rau cov kab teeb liab tseem ceeb lossis cov chaw hauv zos.
Cov kab teeb liab zaus siab uas muab tso rau ntawm txheej saum npoo av yuav tsim cov hluav taws xob electromagnetic loj dua. Cov kab teeb liab zaus siab yuav tsum muab tso rau nruab nrab ntawm txheej fais fab thiab txheej hauv av. Cov hluav taws xob uas tsim tawm yuav tsawg dua vim yog kev nqus cov nthwv dej electromagnetic los ntawm txheej fais fab thiab txheej hauv qab.
Qhov txawv ntawm PCB ceev ceev thiab PCB txheem yog dab tsi?
Rau ib qho PCB txheem, tib neeg feem ntau txhawj xeeb txog qhov luv luv ntawm lub voj voog, rwb thaiv tsev, thiab lwm yam teeb meem ntawm cov hlau hlau. Txawm li cas los xij, nrog rau kev nrhiav kev ua tau zoo ntawm cov khoom siv hluav taws xob, qhov zaus xa xov tooj cua yuav tsum tau nce ntxiv thiab tib neeg txhawj xeeb ntau ntxiv txog kev tsim qauv ntawm cov teeb liab ntawm PCB ceev ceev.
Puas muaj tej yam tshwj xeeb uas yuav tsum xav txog thaum siv cov PCBs ceev ceev?
Cov kev xav tshwj xeeb yog nyob rau hauv kev tsim thiab tsim cov PCB ceev ceev thaum tuav cov PCB ceev ceev.
Qhov ntev ntawm txoj kev sib txawv yuav tsum sib phim.
Txoj kev taw qhia yuav tsum tsis txhob hla cov dav hlau hauv av uas tsis tiav.
Tsis txhob muab cov ntsiab lus sim rau ntawm cov kab teeb liab ceev sib txawv.
Tsis txhob xa cov kab teeb liab ceev ceev ze lossis hauv qab cov siv lead ua, oscillators, switching power supplies, mounting holes, magnetic devices, lossis periodic signal chips.
Sim xa cov kab teeb liab ceev ceev rau ntawm cov txheej sab saud thiab hauv qab nrog cov txheej hauv av tag nrho. Nws tsis pom zoo kom xa cov kab ntawm lub dav hlau sab hauv.
Khaws qhov deb ntawm lub teeb liab ceev ceev mus rau ntug ntawm txheej av siv ntau dua 90mil.
Ua tib zoo saib xyuas kev tswj hwm ntawm lub qhov (socket) thiab cov xov hlau sib txuas.
Qhov dav ntawm cov tooj liab, qhov chaw, thiab cov qauv layup yuav tsum tau tswj kom meej kom tau raws li tus nqi impedance nruj.
Feem ntau yuav tsum tau kuaj TDR impedance thaum cov PCBs ceev ceev tiav lawm.
Yuav tsum xaiv cov hom khoom siv kom raug kom ua tau raws li cov haujlwm xav tau.
Yuav tsum muaj qhov chaw tiaj tiaj rau cov PCBs ceev ceev, thiab peb ib txwm qhia ENIG rau kev kho qhov chaw ENEPIG.
Qhov siab tshaj plaws ntawm kev xa cov ntaub ntawv mus rau PCB ceev yog dab tsi?
Qhov kev hloov pauv ntaub ntawv siab tshaj plaws uas ua tau ntawm PCB ceev yog 10.0GPs (Gigabits ib ob) deb ntawm qhov deb, tab sis qhov no zoo dua tas mus li.
Puas muaj cov cuab yeej tshwj xeeb lossis cov txheej txheem xav tau thaum tsim cov PCB ceev ceev?
Muaj cov cuab yeej software tsim PCB thiab cov cuab yeej simulation EDA uas yuav tsum tau siv thaum tsim PCB ceev xws li Cadence, Mentor, PADS, Altium, HyperLynx, HFSS, ADS, thiab lwm yam.
Nws yog ib qho tsim nyog sau tseg tias ib qho cuab yeej software yuav tsim nyog rau ib qhov project PCB, thaum lwm yam cuab yeej software siv tau zoo dua rau lwm hom project. Yog li ntawd, nws yog ib qho tseem ceeb heev uas yuav tsum nrhiav cov cuab yeej software tsim PCB zoo.
Cov lus qhia yooj yim thiab cov neeg muab khoom ntawm cov khoom siv PCB ceev ceev yog dab tsi?
Cov khoom siv ceev ceev tuaj yeem yog FR4, ceramic, PTFE lossis PTFE reinforced khoom nrog 1 Ghz txog 100 Ghz. Muaj ntau tus neeg xa khoom PCB ceev ceev xws li: Rogers, ISOLA, Ventec, ITEQ, TUC, SHENGYI, Panasonic, Taconic, thiab lwm yam.
Cov yuam kev feem ntau hauv kev xaiv cov ntaub ntawv PCB rau cov kab ke radar yog dab tsi?
Qhov yuam kev feem ntau hauv kev xaiv cov khoom siv PCB rau cov kab ke radar suav nrog kev cia siab rau ib yam khoom siv xwb (piv txwv li, siv FR-4 rau cov ntawv thov zaus siab), tsis quav ntsej txog kev xav tau kev tswj hwm thermal, thiab tsis quav ntsej txog qhov nyuaj ntawm kev tsim cov khoom siv siab heev.