Nws yog qhov paub zoo tias qhov zoo tshaj plaws ntawm cov rooj sib tham hauv Circuit Court yog tso cai rau kev sib txuas hauv Circuit Court nyob rau hauv qhov chaw txwv. Txawm li cas los xij, thaum nws los txog rau OEM PCBA (Cov Khoom Siv Tseem Ceeb Chaw Tsim Tshuaj Luam Circuit Court board Assembly) tsim, tshwj xeeb tswj impedance, engineers yuav tsum tau kov yeej ntau yam kev txwv thiab cov teeb meem. Tom ntej no, tsab xov xwm no yuav nthuav tawm cov kev txwv ntawm kev tsim Rigid-Flex PCB nrog kev tswj hwm impedance.
Rigid-Flex PCB Tsim
Rigid-Flex PCBs yog ib qho hybrid ntawm nruj thiab hloov tau yooj yim Circuit Court boards, integrating ob technologies rau hauv ib chav tsev. Qhov kev tsim qauv no tso cai rau kev hloov pauv ntau dua hauv cov ntawv thov uas qhov chaw nyob ntawm tus nqi, xws li hauv cov khoom siv kho mob, aerospace, thiab cov khoom siv hluav taws xob. Lub peev xwm los khoov thiab quav PCB yam tsis muaj kev cuam tshuam nws txoj kev ncaj ncees yog qhov zoo dua. Txawm li cas los xij, qhov kev hloov pauv no los nrog nws tus kheej cov teeb meem, tshwj xeeb tshaj yog thaum nws los txog rau kev tswj hwm impedance.
Impedance Requirements ntawm Rigid-Flex PCBs
Kev tswj hwm impedance yog qhov tseem ceeb hauv kev kub ceev digital thiab RF (Xov tooj cua zaus) kev siv. Lub impedance ntawm PCB cuam tshuam rau lub teeb liab kev ncaj ncees, uas tuaj yeem ua rau muaj teeb meem xws li teeb liab poob, kev xav, thiab kev sib tham. Rau Rigid-Flex PCBs, tuav lub impedance zoo ib yam thoob plaws hauv kev tsim yog qhov tseem ceeb los xyuas kom meej qhov ua tau zoo.
Feem ntau, qhov impedance ntau rau Rigid-Flex PCBs tau teev nyob nruab nrab ntawm 50 ohms thiab 75 ohms, nyob ntawm daim ntawv thov. Txawm li cas los xij, kev ua tiav qhov kev tswj hwm impedance tuaj yeem nyuaj vim qhov tshwj xeeb ntawm Rigid-Flex designs. Cov ntaub ntawv siv, lub thickness ntawm cov khaubncaws sab nraud povtseg, thiab cov khoom dielectric tag nrho ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab impedance.
Kev txwv ntawm Rigid-Flex PCB Stack-Up
Ib qho ntawm cov kev txwv tseem ceeb hauv kev tsim Rigid-Flex PCBs nrog kev tswj hwm impedance yog cov teeb tsa pawg. Lub stack-up yog hais txog kev npaj cov txheej hauv PCB, uas tuaj yeem suav nrog cov txheej tooj liab, cov khoom siv hluav taws xob, thiab cov nplaum nplaum. Nyob rau hauv Rigid-Flex designs, lub stack-up yuav tsum haum rau ob qho tib si nruj thiab saj zawg zog seem, uas yuav nyuaj rau impedance tswj txheej txheem.
1. Kev txwv ntawm cov khoom siv
Cov ntaub ntawv siv hauv Rigid-Flex PCBs tuaj yeem cuam tshuam rau impedance. Cov ntaub ntawv yooj yim feem ntau muaj cov dielectric sib txawv piv rau cov ntaub ntawv nruj. Qhov sib txawv no tuaj yeem ua rau muaj kev hloov pauv hauv impedance uas nyuaj rau tswj. Tsis tas li ntawd, kev xaiv ntawm cov ntaub ntawv tuaj yeem cuam tshuam rau tag nrho cov kev ua tau zoo ntawm PCB, suav nrog thermal stability thiab mechanical zog.
2. Txheej Thickness Variability
Lub thickness ntawm cov khaubncaws sab nraud povtseg nyob rau hauv ib tug Rigid-Flex PCB muaj peev xwm sib txawv heev ntawm cov nruj thiab saj zawg zog seem. Qhov kev sib txawv no tuaj yeem tsim cov kev sib tw hauv kev tswj xyuas qhov impedance zoo ib yam thoob plaws hauv pawg thawj coj. Cov kws ua haujlwm yuav tsum ua tib zoo xam cov thickness ntawm txhua txheej kom ntseeg tau tias cov impedance tseem nyob hauv qhov kev teev tseg.
3. Khoov Radius Kev txiav txim siab
Lub vojvoog khoov ntawm Rigid-Flex PCB yog lwm qhov tseem ceeb uas tuaj yeem cuam tshuam rau impedance. Thaum lub PCB yog khoov, cov khoom siv dielectric tuaj yeem compress lossis ncab, hloov cov yam ntxwv impedance. Cov neeg tsim qauv yuav tsum suav rau lub vojvoog khoov hauv lawv cov kev suav kom paub meej tias qhov impedance tseem nyob ruaj khov thaum lub sijhawm ua haujlwm.
4. Kev tsim khoom kam rau ua
Kev tsim kev kam rau siab kuj tseem tuaj yeem tsim teeb meem hauv kev ua tiav kev tswj hwm impedance hauv Rigid-Flex PCBs. Kev hloov pauv hauv cov txheej txheem tsim khoom tuaj yeem ua rau tsis sib xws hauv txheej txheej, cov khoom siv, thiab qhov loj me. Cov kev tsis sib haum xeeb no tuaj yeem ua rau impedance mismatches uas tuaj yeem ua rau lub teeb liab tsis zoo.
5. Kev xeem thiab kev lees paub
Kev Ntsuas Rigid-Flex PCBs rau kev tswj impedance tuaj yeem ua haujlwm ntau dua li ib txwm nruj lossis hloov pauv PCBs. Cov cuab yeej tshwj xeeb thiab cov tswv yim yuav tsum raug ntsuas kom raug ntsuas impedance thoob plaws ntau ntu ntawm pawg thawj coj. Qhov kev nyuaj ntxiv no tuaj yeem ua rau lub sijhawm thiab tus nqi cuam tshuam nrog kev tsim thiab kev tsim khoom.
Post lub sij hawm: Oct-28-2024
Rov qab
