Qhov no txhais tau li cas rau qhov kev lag luam PC siab-ceev pcb?
Ua ntej tshaj plaws, thaum tsim thiab tsim PCB stacks, cov khoom siv cov ntaub ntawv yuav tsum yog qhov tseem ceeb. 5G Pcbs yuav tsum ua txhua yam tshwj xeeb thaum nqa khoom thiab tau txais kev sib kis cov cim kos npe, muab kev sib txuas hluav taws xob, thiab muab kev tswj cov khoom siv tshwj xeeb. Ib qho ntxiv, cov kev tsim qauv PCB yuav tsum tau hais txog, xws li tswj hwm lub cim kev sib raug zoo, thiab yuav ua li cas tiv thaiv kev cuam tshuam hluav taws xob hauv hluav taws xob (EMI) ntawm cov ntaub ntawv thiab cov laug cam.

Sib xyaw cim tau txais cov board tsim qauv
Niaj hnub no, feem ntau cov system muaj kev cuam tshuam nrog 4G thiab 3G PCBs. Qhov no txhais tau hais tias cov khoom sib xyaw ua ke thiab tau txais cov zaus ntau npaum li cas yog 600 MHZ rau 5.925 GHz, thiab 200 Khrz, lossis 200 kHz rau iot tshuab. Thaum tsim PCBS rau 5G Network Systems, cov khoom siv no yuav xav tau millimeter Flow zaus ntawm 28 GHz, nyob ntawm daim ntawv thov. Rau bandwidth channel, 5g tshuab yuav ua cov txheej txheem 100mHz hauv qab 6GHz thiab 400MHz saum toj 6GHz.

Cov khoom siv nrawm dua thiab cov nquag tseem yuav tsum tau siv cov ntaub ntawv tsim nyog hauv PCB kom zoo thiab xa cov cim qis thiab siab dua tsis muaj teeb liab ploj thiab EMI. Lwm qhov teeb meem yog tias cov cuab yeej yuav ua ntais, ntau lub portable, thiab me dua. Vim hnyav nruj, qhov loj me thiab chaw muaj kev txwv, cov ntaub ntawv PCB yuav tsum yoog raws li cov khoom siv hluav taws xob microelecronic.

Rau PCB tooj liab kab, thinner cov kab thiab stricter kev tswj kev tswj yuam yuav tsum tau ua raws. Cov kev sib dhos ib txwm siv etching txheej txheem siv rau 3G thiab 4g High-ceev pcbs tuaj yeem hloov mus rau cov txheej txheem semi-adcessitive. Cov txheej txheem zoo dua qub yuav muab cov txheej txheem ntau dua thiab cov phab ntsa sib zog.

Cov khoom siv hauv paus kuj tseem raug kho dua tshiab. Cov ntawv luam tawm cov tuam txhab lag luam yog cov ntaub ntawv uas muaj hnub nyoog qis li 3, vim tias cov qauv cov qauv rau cov qauv ceev feem ntau 3.5 rau 5.5. Nthiv iav fiber heev, qis dua cov khoom siv tsis zoo, yog li tiv thaiv cov cim tsis sib xws thiab txhim kho cov paib kev ncaj ncees.

EMI Kev Tiv Thaiv Teeb Meem
EMI, Crosstalk thiab cov cab kuj muaj peev xwm capacitance yog qhov teeb meem tseem ceeb ntawm cov laug cam hluav taws xob. Txhawm rau txhawm rau nrog cov CrosStalk thiab EMI vim yog qhov analog thiab digital zaus ntawm lub rooj tsavxwm, nws raug pom zoo kom cais cov kab. Kev siv ntawm cov laug multiilayer yuav muab cov khoom siv zoo dua los txiav txim siab kom pom cov cim hluav taws xob nrawm thiab cov cim kev nrawm nrawm, thaum khaws AC thiab DC voj voog cais. Ntxiv kev tiv thaiv thiab lim thaum tso cov khoom siv yuav tsum tau txo cov txiaj ntsig ntuj ntawm lub ntsej muag ntawm PCB.

Txhawm rau kom ntseeg tau tias tsis muaj qhov tsis xws luag thiab cov kab ke luv luv lossis cov haujlwm hloov kho tshiab thiab 2D metrology yuav raug siv los tshawb xyuas cov kab lag luam thiab ntsuas lawv. Cov thev naus laus zis yuav pab PCB cov tuam ntxhab saib kom muaj teeb liab teeb meem kev pheej hmoo.

Thermal Kev Tswj Xyuas Cov Kev Sib Tw
Lub teeb liab siab dua yuav ua rau muaj qhov tam sim no los ntawm PCB los tsim kom muaj cua sov ntau dua. Cov ntaub ntawv PCB rau cov ntaub ntawv dielecric thiab cov tub ntxhais substrate txheej yuav tsum tau ua kom muaj txiaj ntsig zoo los ntawm 5g thev naus laus zis. Yog tias cov ntaub ntawv tsis txaus, nws yuav ua rau daim phiaj tooj liab, tev thiab kev ua yeeb yam, vim tias cov teeb meem no yuav ua rau PCB rau kev puas tsuaj.

Txhawm rau tiv thaiv cov kev kub siab dua, cov tuam ntxhab yuav tsum tsom rau cov khoom uas cua sov condal thiab thermal coeffal. Cov ntaub ntawv nrog ntau dua thermal conductivity, zoo heev thaum tshav kub kub, thiab xwm txheej diilc ua kom zoo pcb los muab tag nrho 5G cov nta rau daim ntawv thov no.