Ziyini izindwangu ezingaboni nezingcwatshwe?
Ama-vias angaboni: Uma uhlangothi olulodwa kuphela lwama-vias lusengqimbeni engaphandle ye-PCB, abizwa ngokuthi ama-vias angaboni.
Ama-via angcwatshwe: Uma izinhlangothi zombili zama-via zingcwatshwe engxenyeni engaphakathi ye-PCB, zibizwa ngokuthi ama-via angcwatshwe.
Ama-via angaboni futhi angcwatshwe kanjani adalwa kanjani?
Izindlela ezintathu ezilandelayo zingadala ama-via angaboni futhi angcwatshwe:
Ukubhoboza ngomshini okunobubanzi obungaguquki
Ukubopha ngokulingana kanye nokubhoboza
Noma yikuphi ukugoqa kanye nokubhoboza ungqimba
Kuyini ukungaboni ngenqubo yokukhiqiza?
Okokuqala, sikhuluma nge-laser drill blind via holes. Inqubo ye-PCB blind via fabrication inje:
1) Qedela zonke izendlalelo zangaphakathi kuqala;
2) faka izingqimba ezimbili zeshidi le-prepreg nelethusi phezu kwezingqimba zangaphakathi zebhodi le-PCB eseziqediwe;
3) bhoboza i-depth blind elawulwayo nge-laser ku-PCB.
Sicela uqaphele ukuthi ukunemba kubaluleke kakhulu kubantu abayizimpumputhe nge-pad.
Ngokuphathelene ne-mechanical drill blind via holes, sithatha ama-PCB anezingqimba ezine anama-blind vias kungqimba 1 kuya kungqimba 2 isibonelo, inqubo kanje:
1) khiqiza izendlalelo 1 no-2 njenge-PCB ejwayelekile enezendlalelo ezimbili, ngakho-ke kuzoba nokubhoboza ezingqimbeni 1 kuya ku-2;
2) hlanganisa amabhodi amabili ayinhloko ukuze sithole i-PCB enezingqimba ezine, bese sibhoboza i-plating ngezimbobo;
3) uma i-PCB isiqediwe, uthola i-PTH kusuka ezingqimbeni 1 kuya ku-4 kanye nama-blind vias kusuka ezingqimbeni 1 kuya ku-2.
Yiziphi izinzuzo zokusebenzisa ama-via angaboniwe nafihliwe?
Izinzuzo zokusebenzisa i-blind kanye ne-billed zichazwe ngezansi:
Ukunciphisa usayizi nesisindo se-PCB
Ukunciphisa inani lezendlalelo
Ukunciphisa izindleko zokukhiqizwa kwezinhlobo eziningana zama-PCB kusukela ekuhlanganiseni imisebenzi eminingi
Ukuthuthukisa ukuhambisana kwe-electromagnetic
Ukwandisa izici zemikhiqizo kagesi
Ukwenza umsebenzi wokuklama ube lula futhi usheshe
Yiziphi izinselele zokusebenzisa ama-vias angabonwayo nafihliwe?
Ukwenziwa kube kuncane kobubanzi be-vias ezingaboni futhi ezifihliwe kubeka isidingo esikhulu ekukhiqizweni kwe-PCB.
Kudingeka onjiniyela abanolwazi olukhulu kakhulu ukuklama ama-PCB e-vias angaboni futhi afihliwe.
Kuyinselele kakhulu ukuhlanganisa ama-PCB e-vias angaboni futhi agqitshwe njengoba ehlala enama-pad amancane, njengama-pads e-BGA.
Iyini i-blind via aspect ratio evamile?
Ebhodini le-vias eliyi-blind drill nge-laser, isilinganiso esijwayelekile se-blind via singu-1:1.
Yini engcwatshwe nge?
Ama-vias angcwatshwe ku-PCB adlula emigodini ephakathi kwezingqimba zangaphakathi. Sithatha i-blind/engcwatshwe ngezingqimba ezi-6 ngebhodi lesifunda isibonelo: ama-vias angcwatshwe ngebhomu kusukela kungqimba 2-3, 2-4, 2-5, 3-4, 3-5 kanye no-4-5.
Wangcwatshwa nge-vs vs nge-blind via
Ama-Blind via nama-bury via avame ukusetshenziswa ama-HDI PCB, ahlala ekhona emabhodini wesekethe aphrintiwe ngobuchwepheshe obuphezulu ngesikhathi esisodwa. Kodwa ayizinhlobo ezahlukene ngokuphelele zama-via.