Kuyini ukubhoboza i-PCB Back?
Inqubo yokubhoboza emuva kwe-PCB, ebizwa nangokuthi ukubhoboza okujulile okulawulwayo, ihilela ukususa i-stub kuma-PCB anezingqimba eziningi ukuze kudalwe ama-via. Inhloso yokubhoboza emuva ukwenza kube lula ukuhamba kwezimpawu phakathi kwezingqimba ezahlukene zebhodi ngaphandle kokuphazamiseka okuvela kuma-stub angafuneki.
Ukuze sinikeze incazelo ecacile yenqubo yokubhoboza ngemuva, ake sicabangele isibonelo.
Ake sithi kukhona i-PCB enezingqimba ezingu-12 enembobo edlulayo exhumanisa izingqimba zokuqala neze-12. Inhloso ukuxhumanisa ungqimba lokuqala kuphela nengqimba yesi-9, kuyilapho kugcinwa ungqimba lwe-10 kuya kwele-12 lungaxhumekile. Kodwa-ke, izingqimba ezingaxhumekile zidala “izingcezu” ezingaphazamisa indlela yesignali, okuholela ezinkingeni zobuqotho besignali. Ukubhoboza ngemuva kuhilela ukubhoboza lezi zingcezu kusukela ohlangothini olungemuva lwebhodi ukuze kuthuthukiswe ukudluliswa kwesignali.
Iyini inhloso yokubhoboza i-PCB ngemuva?
Ukubhoboza i-PCB back kusetshenziswa ukususa ingxenye engasetshenziswanga yembobo efakwe ipulasitiki (nge) edlula ungqimba lokugcina lwe-PCB. Le nqubo isiza ekunciphiseni izinkinga zobuqotho besignali, njengokukhanya kwe-stub kanye nokubonakaliswa kwesignali, okungenzeka emiklamo yedijithali esheshayo.
Iyini "isilinganiso sobuso"?
Imibuzo Evame Ukubuzwa mayelana namabhodi wesekethe aphrintiwe › AMAGAMA
Ubudlelwano phakathi kobubanzi bomgodi nobude bawo. Uma umenzi ethi umkhiqizo wakhe "unesilinganiso" esingu-8:1 kusho, isibonelo, ukuthi ububanzi bomgodi bungu-0.20 mm ku-PCB engu-1.60 mm ubukhulu.
Ngezakhiwo ze-HDI, isilinganiso se-aspect ratio se-microvia sinqunyelwe ku-1:1, kodwa u-0.7-0.8:1 kungcono kunokufaka i-plating kalula.
Yiziphi izinzuzo zokubhoboza i-PCB ngemuva?
Izinzuzo zokubhoboza ngemuva kwe-PCB zifaka phakathi ubuqotho besignali obuthuthukisiwe, ukulahleka okuncishisiwe kokufakwa, ukulawulwa okuthuthukisiwe kokukhuluma, kanye nokwanda komkhawulokudonsa. Ngokususa ingxenye engasetshenziswanga yebharele elihamba nge-via, ukubhoboza emuva kunciphisa ukugqama kwe-stub kanye nokubonakaliswa kwesignali, okuholela ekudlulisweni kwesignali okuhlanzekile nokunembile.