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dangv8
01

Nug Cov Lus Nug Feem Ntau
qhia2v
02

Cov Lus Nug Txog Kev Pabcuam PCB
ddangusw
03

Cov Lus Nug Txog Kev Pabcuam PCB Sib Dhos

Cov Lus Nug Feem Ntau

PCB rov qab tho qhov

PCB Back Drilling yog dab tsi?

Cov txheej txheem ntawm kev khawb PCB rov qab, tseem hu ua kev khawb tob uas tswj tau, suav nrog kev tshem tawm cov stub hauv ntau txheej PCBs los tsim vias. Lub hom phiaj ntawm kev khawb rov qab yog los pab txhawb kev ntws ntawm cov teeb liab ntawm ntau txheej ntawm lub rooj tsavxwm yam tsis muaj kev cuam tshuam los ntawm cov stubs tsis xav tau.
Yuav kom piav qhia meej dua txog cov txheej txheem drilling rov qab, cia peb xav txog ib qho piv txwv.
Xav tias muaj ib lub PCB 12-txheej uas muaj qhov txuas cov txheej thawj thiab txheej thib 12. Lub hom phiaj yog txuas tsuas yog txheej thawj rau txheej thib 9, thaum tseem ua kom txheej thib 10 txog txheej thib 12 tsis txuas. Txawm li cas los xij, cov txheej tsis txuas tsim cov "stubs" uas tuaj yeem cuam tshuam rau txoj kev teeb liab, ua rau muaj teeb meem kev ua haujlwm ntawm lub teeb liab. Kev khawb rov qab suav nrog kev khawb cov stubs no los ntawm sab nraub qaum ntawm lub rooj tsavxwm kom txhim kho kev xa xov teeb liab.

Lub hom phiaj ntawm PCB rov qab drilling yog dab tsi?

Kev siv lub tshuab tho PCB rov qab los tshem tawm qhov seem uas tsis tau siv ntawm lub qhov (ntawm) uas txuas ntxiv mus dhau txheej kawg ntawm PCB. Cov txheej txheem no pab txo cov teeb meem kev ua haujlwm ntawm lub teeb liab, xws li kev cuam tshuam ntawm lub suab thiab kev cuam tshuam ntawm lub teeb liab, uas tuaj yeem tshwm sim hauv cov qauv digital ceev ceev.

"Qhov sib piv ntawm cov duab" yog dab tsi?

Cov Lus Nug Feem Ntau Txog Cov Rooj Sib Tham Luam Tawm › COV LUS QHIA
Kev sib raug zoo ntawm txoj kab uas hla ntawm lub qhov thiab nws qhov ntev. Thaum ib lub chaw tsim khoom hais tias lawv cov khoom muaj "qhov sib piv" ntawm 8: 1 nws txhais tau tias, piv txwv li, tias txoj kab uas hla ntawm lub qhov yog 0.20 hli hauv 1.60 hli tuab PCB.
Rau cov qauv HDI, qhov sib piv ntawm microvia tsuas yog txwv rau 1: 1, tab sis 0.7-0.8: 1 yog qhov zoo dua rau kev yooj yim plating.

Cov txiaj ntsig ntawm PCB rov qab drilling yog dab tsi?

Cov txiaj ntsig ntawm kev khawb PCB rov qab muaj xws li kev txhim kho lub teeb liab kom zoo dua, txo qhov poob ntawm kev ntxig, kev tswj hwm kev sib txuas lus zoo dua, thiab nce bandwidth. Los ntawm kev tshem tawm qhov tsis siv ntawm lub raj xa hluav taws xob, kev khawb rov qab txo qis qhov resonance stub thiab kev cuam tshuam ntawm cov teeb liab, ua rau kev xa cov teeb liab huv dua thiab raug dua.