1, Dab tsi yog 1oz tooj liab tuab 4 txheej impedance board
Lub ntsiab lus ntawm "1oz tooj liab thickness": "oz" yog cov lus Askiv luv luv rau ounce. Hauv pcbfield, 1oz tooj liab thickness hais txog qhov hnyav ntawm cov ntawv ci tooj liab yog 1 ounce ib square feet ntawm cheeb tsam. Los ntawm kev hloov dua siab tshiab, nws tuaj yeem pom tias qhov tuab ntawm 1oz tooj liab yog li 0.035mm. Qhov tuab ntawm cov ntawv ci tooj liab no tsis tsuas yog ua kom zoo conductivity, tab sis kuj muaj qee yam kev siv zog thiab lub peev xwm nqa tam sim no, ua rau nws ib txwm siv tooj liab thickness specification hauv pcbdesign. Nyob rau hauv ib lub voj voog, ib txheej tooj liab tuab tuaj yeem txo cov xaim tsis kam thiab txo qis hluav taws xob thaum lub sij hawm kis tau tus mob tam sim no, ib yam li txoj kev dav dav tso cai rau cov tsheb hla ntau dua, txo cov congestion thiab kev siv zog. Piv txwv li, hauv qee qhov hluav taws xob hauv hluav taws xob uas yuav tsum tau muaj peev xwm nqa tam sim no, 1oz tooj liab tuab kab tuaj yeem ua tau raws li qhov xav tau ntawm cov kev xav tau ntawm cov tam sim no siab, tsis txhob overheating los yog hlawv ntawm cov kab vim muaj ntau dhau tam sim no.
Kev soj ntsuam ntawm "4 txheej" qauv: Ib qho 4 txheej impedance board muaj plaub txheej txheej, feem ntau suav nrog txheej sab saum toj, txheej hauv qab, txheej fais fab, thiab txheej hauv av. Cov khaubncaws sab nraud povtseg sab saum toj thiab hauv qab feem ntau yog siv rau kev teeb tsa cov khoom siv thiab qhov chaw mount, ua haujlwm ua "qhov rais" rau kev sib txuas cov khoom siv hluav taws xob rau lub ntiaj teb sab nraud. Ntau yam khoom siv hluav taws xob xws li chips, resistors, capacitors, thiab lwm yam yog soldered ntawm ob txheej no. Lub hwj chim txheej yog lub luag hauj lwm los muab cov khoom siv hluav taws xob ruaj khov rau tag nrho cov kab hluav taws xob, ib yam li lub zog hluav taws xob hauv ib lub nroog, kom ntseeg tau tias txhua qhov chaw muaj hluav taws xob txaus. Cov txheej txheej geological ua haujlwm raws li daim thaiv npog thiab siv lub peev xwm, zoo li lub ntiaj teb ruaj khov, muab kev siv ruaj khov rau cov teeb liab hauv Circuit Court, txo cov electromagnetic cuam tshuam, thiab ua kom ruaj ntseg ntawm cov teeb liab kis tau tus mob. Cov plaub plag tsev no yog hluav taws xob txuas los ntawm vias, uas zoo li txuas cov elevator ntawm cov plag tsev sib txawv, tso cai rau cov teeb liab thiab cov dej ntws mus rau kev ywj pheej ntawm txhua lub tsev, tsim kom muaj ib qho kev sib txuas ua ke.
Qhov tseem ceeb ntawm "impedance": impedance yog hais txog qhov cuam tshuam ntawm kev cuam tshuam ntawm Circuit Court ntawm AC cov cim, thiab kev sib txuam impedance yog qhov tseem ceeb rau siab -frequency signal kis. Nyob rau hauv 4 txheej impedance board, tshwj xeeb impedance qhov tseem ceeb xws li 50 Ω thiab 75 Ω yog ua tiav los ntawm kev tswj tsis raug xws li qhov dav dav, tooj liab thickness, dielectric txheej thickness, thiab dielectric tas li. Thaum cov zis impedance ntawm lub teeb liab qhov chaw sib tw nrog cov yam ntxwv impedance ntawm cov kab sib kis thiab cov load impedance, lub teeb liab tuaj yeem nthuav tawm ntawm cov kab sib txuas yam tsis muaj kev cuam tshuam, yog li ua kom muaj kev ncaj ncees ntawm cov teeb liab thiab tsis txhob muaj teeb meem xws li teeb liab distortion thiab attenuation. Qhov no zoo li suab propagating los ntawm cov kav dej ntawm cov khoom sib txawv. Yog tias qhov loj me thiab cov khoom siv ntawm cov kav dej tsis haum, lub suab yuav ua rau echoes thiab attenuation, thaum cov kav dej tsim nyog (xws li impedance matched kis kab) tuaj yeem tso cai rau lub suab kom nthuav tawm kom meej thiab tsis muaj kev puas tsuaj rau qhov chaw.
2, Cov ntsiab lus tseem ceeb ntawm kev tsim khoom
Kev xaiv khoom siv:
Substrate: FR-4 feem ntau yog siv los ua cov khoom siv substrate. FR-4 muaj cov hluav taws xob rwb thaiv tsev zoo, cov khoom siv kho tshuab, thiab qhov ruaj khov, thiab tuaj yeem tiv taus qee qhov kev hloov pauv kub, ua rau nws tsim nyog rau qhov chaw ua haujlwm ntawm cov khoom siv hluav taws xob feem ntau. Nyob rau hauv cov xwm txheej ntawm daim ntawv thov siab, cov khoom siv tshwj xeeb uas tsis tshua muaj dielectric tsis tu ncua thiab tsis tshua muaj dielectric poob, xws li Rogers cov ntaub ntawv, kuj tseem siv los txo cov teeb liab sib kis thiab txhim kho impedance tswj qhov tseeb.
Copper foil: Rau qhov yuav tsum tau muaj 1oz tooj liab thickness, ib tug haum thickness ntawm tooj liab ntawv ci feem ntau xaiv rau lamination thaum lub sij hawm ntau lawm txheej txheem. Piv txwv li, nws muaj peev xwm ua ntej siv 1/3oz lossis 1/2oz tooj liab ntawv ci, thiab tom qab ntawd ua kom cov tuab ntawm cov txheej tooj liab los ntawm cov txheej txheem electroplating tom ntej kom ua tiav qhov kawg 1oz tooj liab thickness txheem. Qhov no tuaj yeem ua kom muaj kev tswj xyuas meej ntawm cov hlau dav thaum lub sij hawm etching txheej txheem, thaum tseem ua tau raws li qhov yuav tsum tau rau saum npoo tooj liab thickness, kom ntseeg tau cov conductivity thiab kev ntseeg siab ntawm lub Circuit Court.
Kab ntau lawm txheej txheem:
High precision Circuit Court forming: Yuav kom ua tau raws li qhov siab - qhov yuav tsum tau muaj ntawm kev tswj impedance, qib siab laser direct imaging technology yog saws. Cov tshuab no tuaj yeem ua tiav cov kab ntau lawm, nrog cov kab dav qhov tseeb tswj hauv ± 0.01mm thiab kab ntug roughness tsawg dua 1 μ m. Ua ib qho kev tsim ntawm 50 Ω yam ntxwv impedance Circuit Court ua piv txwv, los ntawm kev tswj xyuas qhov tsis xws li qhov dav dav, qhov sib nrug, thiab kev ncua deb ntawm cov txheej txheem siv, qhov tseeb impedance yog xyuas kom tswj tau nyob rau hauv ± 5%, zoo heev txo impedance transients thaum lub sij hawm teeb liab kis tau tus mob, txo cov teeb liab kev xav thiab sawv yoj piv, thiab ua kom muaj kev sib kis.
Micro ntawm machining: Nyob rau hauv 4 txheej boards, ib tug loj tus naj npawb ntawm cov qhov yuav tsum tau machined kom ua tiav cov teeb liab kev sib txuas ntawm cov khaubncaws sab nraud povtseg. Rau 1oz tooj liab tuab 4 txheej impedance daim hlau, laser drilling tshuab feem ntau yog siv los tsim micro vias. Cov no ntawm txoj kab uas hla feem ntau yog qis dua 0.1mm, nrog cov phab ntsa du thiab burr dawb, zoo txo qhov kev xav tsis zoo ntawm cov teeb liab ntawm qhov. Los ntawm lub qhov electroplating txais cov txheej txheem tooj liab plating zoo heev los xyuas kom meej cov tuab ntawm cov txheej tooj liab ntawm lub qhov phab ntsa, nrog rau kev sib txawv ntawm qhov tsawg dua lossis sib npaug li 10%, yog li ua kom muaj kev ua tau zoo thiab lub zog ntawm kev sib txuas ntawm interlayer thiab tsis txhob cuam tshuam cov teeb liab cuam tshuam los ntawm kev ua tsis tiav.
Txheej txheem kev kho deg:
Cov txheej txheem kev kho saum npoo xws li electroless npib tsib xee kub plating yog dav siv nyob rau hauv qhov chaw tseem ceeb xws li RF interfaces thiab ntaus ntawv ncoo ntawm millimeter yoj PCBs. Rau 1oz tooj liab tuab 4 txheej impedance board, lub thickness ntawm cov kub txheej feem ntau tswj kom siab tshaj 0.1 μ m, thiab cov thickness ntawm cov nickel txheej yog siab tshaj 5 μ m. Txoj kev ua no tsis tsuas yog ua kom muaj kev ntseeg siab ntawm cov pob qij txha, tab sis kuj tseem txo qis kev tiv thaiv kev sib cuag ntawm lub interface, txo qhov kev hloov pauv ntawm RF connector thiab pcbsolder sib koom ua ke, kom ntseeg tau tias qhov kev xav poob ntawm lub teeb liab ntawm lub interface yog tsawg dua -20dB, thiab txhim kho kev ruaj ntseg ntawm cov teeb liab kis tau tus mob.
3, Kev ua tau zoo zoo
Kev ua tau zoo ntawm hluav taws xob: 1oz tooj liab tuab txo qhov kev tiv thaiv ntawm Circuit Court, txo qis zog thaum lub teeb liab kis tau tus mob thiab txhim kho kev ua haujlwm hauv Circuit Court. Piv txwv li, nyob rau hauv cov teeb liab kis kab ntawm cov khoom siv kev sib txuas lus, cov kab tsis muaj zog tuaj yeem txo cov teeb liab attenuation thiab xyuas kom meej tias cov teeb liab muaj peev xwm tuav tau lub zog txaus thiab zoo tom qab ntev - kis tau tus mob. Nyob rau tib lub sijhawm, 4 txheej txheej txheej, ua ke nrog kev tswj hwm impedance, muab cov kev sib txuas lus ruaj khov rau siab - cov cim zaus, txo cov teeb liab kev cuam tshuam thiab cuam tshuam. Nyob rau hauv lub teeb liab ua module ntawm 5G kev sib txuas lus hauv paus chaw nres tsheb, nws tuaj yeem ua kom muaj kev sib kis tau zoo ntawm siab -frequency millimeter yoj signals, ua tau raws li qhov yuav tsum tau muaj ntawm 5G tes hauj lwm rau siab - nrawm thiab siab - muaj peev xwm xa cov ntaub ntawv.
Cov khoom siv dag zog muaj zog: Kev sib xyaw ntawm FR-4 substrate thiab 1oz tooj liab tuab endows pcb nrog qee lub zog siv tshuab, uas tuaj yeem tiv taus qee qhov kev cuam tshuam sab nraud thiab kev co. Hauv kev lag luam tsheb hluav taws xob, tsheb ntsib ntau yam pob thiab vibrations thaum tsav tsheb. Lub 1oz tooj liab tuab 4 txheej impedance board tuaj yeem siv rau hauv cov khoom siv hluav taws xob xws li lub cav tswj lub cav thiab hauv lub tshuab kev lom zem hauv tsheb kom ua haujlwm ruaj khov nyob rau hauv qhov chaw ua haujlwm nyuaj thiab txo qhov kev ua tsis tiav los ntawm kev siv tshuab.
Kev ua tau zoo ntawm cov cua kub dissipation: Thaum lub sijhawm ua haujlwm ntawm cov khoom siv hluav taws xob, cov khoom siv hluav taws xob tsim hluav taws xob, thiab kev ua haujlwm zoo thaum tshav kub kub dissipation yog tus yuam sij rau kev ua haujlwm ruaj khov. Lub 1oz tuab tooj liab hlau tuaj yeem ua haujlwm tau zoo thaum tshav kub kub dissipation channel, sai sai dissipating tshav kub. Nyob rau tib lub sijhawm, kev tsim qauv ntawm 4 txheej pawg thawj coj tuaj yeem tsim kom muaj kev sib haum xeeb ntawm cov cua sov, xws li ua kom cov cua sov dissipation los ntawm kev teeb tsa thaj chaw loj ntawm cov tawv nqaij tooj liab hauv cov txheej txheem hluav taws xob thiab hauv av, thiab koom tes nrog cov khoom siv hluav taws xob sab nraud kom raws sij hawm dissipate cov cua sov tsim los ntawm cov khoom siv hluav taws xob, kom ntseeg tau tias qhov kub thiab txias ntawm cov khoom siv hluav taws xob ntev ntev} nyob rau hauv lub sijhawm ntev ntawm cov khoom siv hluav taws xob. kev pab cuam lub neej ntawm cov khoom siv.
4, Daim ntawv thov teb
Hauv kev sib txuas lus, nws tau siv dav hauv cov khoom siv sib txuas lus xws li 5G hauv paus chaw nres tsheb, routers, thiab keyboards. Lub teeb liab transceiver module ntawm 5G hauv paus chaw nres tsheb yuav tsum tau ua cov txheej txheem siab - zaus thiab siab - cov teeb liab ceev. A 1oz tooj liab tuab 4 txheej impedance board tuaj yeem ua tau raws li nws cov kev cai nruj rau cov teeb liab kev ncaj ncees thiab kev ruaj ntseg, kom ntseeg tau cov ntaub ntawv ceev thiab raug ntawm cov chaw nres tsheb thiab cov khoom siv davhlau ya nyob twg. Routers thiab keyboards siv nyob rau hauv tsev thiab kev lag luam tes hauj lwm kuj tso siab rau lub pcbboard no kom ua tau zoo cov ntaub ntawv xa mus thiab teeb liab ua, muab cov neeg siv nrog ruaj khov thiab siab -kev sib txuas network ceev.
Hauv kev tshawb fawb ntawm computer science, lub khoos phis tawj motherboard, uas yog lub hauv paus tseem ceeb ntawm lub khoos phis tawj, siv 1oz tooj liab tuab 4 txheej impedance board los muab cov khoom siv hluav taws xob ruaj khov thiab siab - cov ntaub ntawv xa mus ceev rau siab - cov khoom ua tau zoo xws li CPU, nco, thiab daim npav duab. Hauv server motherboards, hom pcbboard no tshwj xeeb yog xav tau los txhawb kev sib koom ua haujlwm ntawm ntau- cov txheej txheem tseem ceeb, ntau lub cim xeeb, thiab siab - ceev cia li, ua tau raws li cov kev xav tau ntawm cov chaw zov me nyuam rau cov ntaub ntawv loj - teev cov ntaub ntawv ua thiab khaws cia, thiab xyuas kom cov servers ua haujlwm tau zoo.
Hauv kev lag luam automotive electronics: Nrog rau kev loj hlob ntawm kev txawj ntse thiab hluav taws xob tsheb, automotive electronic systems tau dhau los ua nyuaj. Lub 1oz tooj liab tuab 4 txheej impedance phaj plays lub luag haujlwm tseem ceeb hauv tsheb pib tsav tsheb, tsheb xov xwm kev lom zem kaw lus, roj teeb tswj system, thiab lwm yam. Nyob rau hauv nws pib tsav system, nws yog ib qho tsim nyog yuav tau ceev cov ntaub ntawv ntau ntawm ntau yam sensors. Qhov no pcbcan ua kom lub sijhawm thiab qhov tseeb ntawm cov ntaub ntawv xa mus thiab muab kev lees paub rau kev tsav tsheb nyab xeeb. Nyob rau hauv lub tsheb infotainment system, nws yog lub luag hauj lwm rau kev ua tiav ruaj khov kis tau tus mob ntawm multimedia signals xws li suab thiab yees duab, pab txhawb tus neeg siv txoj kev tsav tsheb.
Hauv thaj chaw ntawm cov khoom siv kho mob, cov khoom siv kho mob siab - kawg xws li magnetic resonance imaging thiab computed tomography yuav tsum muaj kev ua tau zoo heev thiab kev ntseeg siab ntawm cov khoom siv hluav taws xob. Lub 1oz tooj liab tuab 4 txheej impedance board, nrog nws zoo heev hluav taws xob kev ua tau zoo thiab stability, muaj peev xwm ua tau raws li qhov siab -precision teeb liab ua thiab xa mus rau cov khoom siv kho mob. Piv txwv li, hauv MRI cov cuab yeej siv, nws yog siv los tswj thiab xa cov cim RF, ua kom pom tseeb thiab qhov tseeb ntawm cov duab, thiab muab pov thawj kev kuaj pom tseeb rau cov kws kho mob.