Chii chinonzi PCB Back Drilling?
Iyo nzira yePCB yekuchera kumashure, iyo inonziwo inodzorwa kudzika kuchera, inosanganisira kubvisa stub mu multilayer PCBs kugadzira vias. Chinangwa chekuchera kumashure ndechekufambisa kuyerera kwezviratidzo pakati pezvikamu zvakasiyana zvebhodhi pasina kukanganiswa kubva kune zvisingadiwi stubs.
Kuti tipe tsananguro yakajeka yemaitiro ekuchera kumashure, ngatifungei muenzaniso.
Ngatitii pane 12-layer PCB ine kuburikidza-buri inobatanidza yekutanga uye yechigumi nembiri. Chinangwa ndechekubatanidza chete chikamu chekutanga kune 9th layer, uchichengeta yegumi kusvika kune gumi nemaviri isina kubatana. Zvisinei, zvidimbu zvisina kubatanidzwa zvinogadzira "stubs" iyo inogona kukanganisa nzira yechiratidzo, zvichikonzera matambudziko ekutendeseka kwechiratidzo. Kuchera kumashure kunosanganisira kuchera kunze aya ma stubs kubva kumashure kwebhodhi kuti uvandudze kutapurirana kwechiratidzo.
Chinangwa chePCB back drilling ndechei?
PCB kuchera kumashure kunoshandiswa kubvisa chikamu chisina kushandiswa cheyakaputirwa kuburikidza neburi (kuburikidza) iyo inotambanukira kupfuura yekupedzisira layer yePCB. Maitiro aya anobatsira kuderedza kutendeseka kwechiratidzo nyaya, senge stub resonance uye chiratidzo chekuratidzira, izvo zvinogona kuitika mukumhanya kwedhijitari dhizaini.
Chii chinonzi "aspect ratio"?
FAQ nezve akadhindwa ematunhu mabhodhi › TERMINOLOGY
Hukama huri pakati pehupamhi hwegomba nekureba kwayo. Kana mugadziri akataura kuti kugadzirwa kwavo kune "aspect ratio" ye8: 1 zvinoreva, semuenzaniso, kuti dhayamita yegomba iri 0.20 mm mune 1.60 mm gobvu PCB.
Kune HDI zvimiro, chikamu chechiyero chemicrovia chinogumira ku1: 1, asi 0.7-0.8: 1 inodiwa kuita nyore kuputira.
Ndeapi mabhenefiti ePCB yekuchera kumashure?
Mabhenefiti ePCB kudhiraivha kumashure anosanganisira yakavandudzwa chiratidzo chekuvimbika, kuderedzwa kwekuisa kurasikirwa, kuwedzeredzwa crosstalk control, uye kuwedzera bandwidth. Nekubvisa chikamu chisina kushandiswa cheiyo via mbiya, kuchera kumashure kunoderedza stub resonance uye chiratidzo chekuratidzira, zvichikonzera kuchena uye kwakaringana kutapurirana kwechiratidzo.