Raws li kev txheeb cais, nyob rau hauv ib lub voj voog, qhov kev tiv thaiv muaj txog li 30 feem pua , lub peev xwm muaj txog li 40 feem pua, yog li cov txheej txheem qis ntawm PCB tso thiab ntsaws cov txheej txheem ntxiv teeb meem ntau. Raws li qhov tshwm sim ntawm kev ua haujlwm dav dav rau cov hluav taws xob hluav taws xob kuj me me, yog li qee cov neeg tau thov seb qhov kev tiv thaiv, kev ua kom muaj peev xwm compression hauv PCB pawg thawj coj saib? Yog li faus resistors, faus capacitors tuaj ua.
faus tsis kam, tseem hu ua faus zaj duab xis tiv thaiv, yog ib qho tshwj xeeb resistive cov ntaub ntawv nias ua ke ntawm ib qho insulating substrate, thiab tom qab ntawd los ntawm kev luam ntawv, etching thiab lwm yam txheej txheem los tsim cov qauv tsim ntawm qhov yuav tsum tau muaj nqi ntawm cov khoom siv sab hauv (sab nrauv), thiab tom qab ntawd nias ua ke nyob rau hauv lub PCB board (on) los tsim ib tug tiaj tus tiv thaiv txheej ntawm ib tug technology.
faus tsis kam yog tsuas yog siv rau lub rooj tsavxwm tsis tuaj yeem nteg tawm lossis txhim kho lub teeb liab, qhov kev tiv thaiv tus nqi tswj qhov tseeb ntawm tsawg dua ± 10 feem pua. faus tsis kam muaj tsib qhov zoo.
(1) Qhov zoo ntawm kev siv high-density / high-speed kis tau tus mob Circuit Court tsim.
Txhim kho qhov impedance txuam ntawm kab.
Shortening txoj kev ntawm cov teeb liab kis tau tus mob thiab txo cov kab mob parasitic inductance.
Tshem tawm ntawm inductive reactance generated nyob rau hauv nto mount los yog cartridge txheej txheem.
Txo cov teeb liab crosstalk, suab nrov thiab electromagnetic cuam tshuam.
(2) Qhov zoo ntawm kev hloov qhov chaw tso tawm resistors.
Kev txo qis ntawm cov khoom siv passive thiab nce qhov ntom ntom ntawm cov khoom siv ua haujlwm tso.
Kev txhim kho ntawm board thaiv muaj peev xwm vim qhov txo qis ntawm cov hlau lead-los ntawm qhov.
Vim tias qhov taw tes soldering raug txo, yog li qhov kev ruaj ntseg ntawm cov khoom siv hluav taws xob tom qab kev sib dhos tau zoo tuaj.
(3) Lub faus resistor tom qab kev koom ua ke muaj qhov zoo hauv kev ruaj ntseg.
(a) Qhov poob ntawm cov faus resistors tom qab txias thiab cua sov cycles yog tsawg heev, txog 50 × 10-6, thaum poob ntawm lwm yam discrete resistive Cheebtsam yog 100 mus rau 300 × 10-6.
Nce hauv kev tiv thaiv ntawm li 2 feem pua tom qab cia ntawm 110 degree rau 10,000h.
Kev ntsuas kev ruaj ntseg hauv ntau qhov ntau zaus, tsawg dua 20GHz.
(4) Tus nqi resistor ntawm ntau yam kev qhia tshwj xeeb tuaj yeem ua ke los ntawm kev hloov kho nws cov qauv, thiab nws tuaj yeem ua tau zoo sib xws nrog interline inductance.
(5) Hauv kev tsim cov khoom siv hluav taws xob sib cais siab, kev siv cov cuab yeej hluav taws xob faus tuaj yeem txo cov txheej txheem thiab qhov loj ntawm PCB, txo qhov zoo ntawm PCB pawg thawj coj saib thiab cov nqi tsim khoom.
Tam sim no, cov khoom siv hluav taws xob ntau dua yog Ni-P cov khoom siv, cov ntsiab lus P dav dav yog kwv yees li 10 feem pua, los ntawm kev kho cov khoom siv Ni-P ntawm cov thickness sib txawv thiab cov ntsiab lus P los kho cov khoom tiv thaiv.
Lub hauv paus tseem ceeb ntawm cov txheej txheem faus tsis kam yog peb etching, tooj liab etching - cov khoom siv tiv taus etching - tooj liab etching (tsim kev ua haujlwm).
