Akwai mai gefe guda, mai gefe biyu da Multi-Layer kewaye allon .Ba a iyakance adadin allunan Layer Layer ba.A halin yanzu akwai fiye da PCB masu Layer 100.PCBs na gama-gari masu Layer Layer ne guda huɗu kuma allunan Layer shida .To me yasa mutane suke da tambaya "Me yasa PCB multilayer allunan duk ma-launi yadudduka? A dangana, ko da-lamba PCBs yi fiye da m-lamba PCBs, kuma suna da ƙarin abũbuwan amfãni.
1. Ƙananan farashi
Saboda rashin Layer na dielectric da foil, farashin albarkatun kasa don PCBs masu ƙima ya ɗan yi ƙasa da na PCB masu ƙidaya.Koyaya, farashin sarrafa PCBs mara kyau yana da girma fiye da na PCBs-Layer.Kudin sarrafawa na Layer na ciki iri ɗaya ne, amma tsarin tsare/tsari a fili yana ƙara farashin sarrafa saman Layer na waje. PCB mai ƙididdigewa yana buƙatar ƙara tsari mara daidaitaccen laminated core Layer bonding bisa tushen tsarin tsarin.Idan aka kwatanta da tsarin makamashin nukiliya, ingancin samar da masana'antu da ke kara wa tsarin nukiliyar zai ragu.Kafin lamination da haɗin gwiwa, babban abin da ke cikin waje yana buƙatar ƙarin aiki, wanda ke ƙara haɗarin ɓarna da kurakurai a kan Layer na waje.
2. Ma'auni tsarin don kauce wa lankwasawa Mafi kyawun dalilin da ba za a ƙirƙira PCB tare da yadudduka mara kyau ba shine cewa ƙarancin adadin allunan kewayawa yana da sauƙin lanƙwasa.Lokacin da aka sanyaya PCB bayan tsarin haɗin gwiwar da'irar multilayer, bambancin lamination tashin hankali na ainihin tsarin da tsarin tsare-tsare zai sa PCB ta lanƙwasa lokacin da ya huce.Yayin da kaurin allon da'irar ke ƙaruwa, haɗarin lanƙwasawa na PCB mai haɗaka tare da sifofi daban-daban guda biyu yana ƙaruwa.Makullin kawar da lankwasawa allon da'irar shine ɗaukar madaidaicin tari.Ko da yake PCB tare da wani mataki na lankwasawa ya dace da ƙayyadaddun buƙatun, za a rage ingancin aiki na gaba, wanda zai haifar da haɓakar farashi.Saboda ana buƙatar kayan aiki na musamman da sana'a yayin haɗuwa, an rage daidaiton sanya kayan aiki, wanda zai lalata ingancin.
Don sanya shi wata hanya, yana da sauƙi a fahimta: A cikin tsarin PCB, allon mai layi huɗu ya fi kyau sarrafawa fiye da allon mai layi uku, musamman dangane da daidaitawa.The warpage na hudu Layer Board za a iya sarrafa a kasa 0.7% (IPC600 misali), amma Lokacin da girman da uku-Layer allon ne babba, da warpage zai wuce wannan ma'auni, wanda zai shafi amincin facin SMT da kuma dukan samfur.Don haka, babban mai zane ba ya zayyana allon allo mai ƙima, ko da mai ƙididdigewa ya gane aikin, zai An tsara shi azaman Layer ko da ƙididdiga na karya, wato Layer 5 an tsara shi azaman 6 layers. kuma 7 yadudduka an tsara su azaman allunan Layer 8. Dangane da dalilan da ke sama, yawancin allunan multilayer na PCB an ƙera su tare da yadudduka masu ƙididdigewa da ƙananan yadudduka masu ƙima.
Yadda za a daidaita stacking da rage farashin m-lamba PCB?
Idan PCB mai lamba ya bayyana a cikin ƙira fa?
Hanyoyi masu zuwa zasu iya cimma daidaiton tari, rage PCB masana'antu farashi, da kuma guje wa PCB lankwasawa.
1) Layer na sigina kuma amfani da shi.Ana iya amfani da wannan hanyar idan madaurin wutar lantarki na ƙirar PCB ya kasance ma kuma siginar siginar ba ta da kyau.Ƙarar Layer baya ƙara farashi, amma yana iya rage lokacin bayarwa da kuma inganta ingancin PCB. 2) Ƙara ƙarin ƙarfin wuta.Ana iya amfani da wannan hanyar idan ƙirar wutar lantarki na ƙirar PCB ba ta da kyau kuma siginar siginar ta kasance.Hanya mai sauƙi ita ce ƙara Layer a tsakiyar tari ba tare da canza wasu saitunan ba.Da farko, bi tsarin PCB mai ƙima, sannan kwafi layin ƙasa a tsakiya don yiwa sauran yadudduka alama.Wannan daidai yake da halayen wutar lantarki na wani kauri mai kauri. 3) Ƙara sigina mara komai kusa da tsakiyar tarin PCB.Wannan hanyar tana rage girman rashin daidaituwa kuma tana haɓaka ingancin PCB.Da farko, bi matakan da ba su da ƙima zuwa hanya, sannan ƙara siginar sigina mara kyau, sannan yi alama sauran yadudduka.An yi amfani da shi a cikin da'irori na microwave da gaurayawan kafofin watsa labarai (maɓalli daban-daban) da'irori. 
English en 
