Kwamitin PCB yana da Layer daya, yadudduka biyu da yadudduka masu yawa, daga cikinsu babu iyaka akan adadin layuka na allon multilayer. A halin yanzu, akwai fiye da yadudduka 100 na PCB, kuma PCB multilayer gama gari shine yadudduka huɗu da yadudduka shida. Don haka me yasa mutane ke cewa, "me yasa PCB multilayers yawanci ma?" Tambayar? Ko da yadudduka suna da fa'idodi fiye da m yadudduka.

1. Ƙananan farashi

Saboda Layer ɗaya na kafofin watsa labarai da foil, farashin albarkatun ƙasa na allunan PCB masu ƙima ya ɗan yi ƙasa da wancan na allunan PCB masu ƙidaya. Duk da haka, sarrafa farashin m-Layer PCB ne muhimmanci mafi girma fiye da na ko da-Layer PCB.The aiki farashin na ciki Layer ne iri daya, amma tsare / core tsarin a fili qara aiki farashin na m Layer.
Odd-Layer PCB bukatar ƙara wadanda ba misali laminated core bonding tsari a kan tushen da makaman nukiliya tsarin process.Compared da makaman nukiliya tsarin, da samar yadda ya dace da shuka da tsare shafi waje da makaman nukiliya tsarin zai rage.The m core bukatar ƙarin aiki. kafin laminating, wanda ke ƙara haɗarin ɓarna da kurakurai a kan Layer na waje.

2. Ma'auni tsarin don kauce wa lankwasawa
Mafi dalilin da za a tsara PCBS ba tare da m-lambobi yadudduka ne cewa m-lambobi yadudduka ne sauki lankwasawa.Lokacin da PCB aka sanyaya bayan Multi-Layer kewaye bonding tsari, daban-daban laminating tashin hankali tsakanin core tsarin da tsare-rufi tsarin zai sa PCB lankwasawa. Yayin da kauri na allon ke ƙaruwa, haɗarin lanƙwasa PCB mai haɗaka tare da sifofi daban-daban yana ƙaruwa. Makullin kawar da lanƙwasawa allon kewayawa shine a yi amfani da madaidaicin layering. za a rage shi, yana haifar da karuwa a farashi.Saboda taro yana buƙatar kayan aiki na musamman da tsari, an rage daidaiton sanyawa abubuwan da aka gyara, don haka zai lalata ingancin.

Canza mafi sauƙin fahimta: a cikin aiwatar da fasahar PCB, allon allo huɗu ya fi kulawar allon allo guda uku, galibi cikin sharuddan daidaitawa, ana iya sarrafa matakin warp na allo na allo a ƙarƙashin 0.7% (IPC600 misali), amma Girman allon allo uku, digiri na warp zai wuce daidaitattun, wannan zai shafi SMT da amincin samfuran duka, don haka babban zanen, ba adadi mai ban sha'awa ba ne na ƙirar allo, koda kuwa ayyuka ne mara kyau. An tsara shi don yin karya ko da Layer, 5 ɗin sun zana 6 layers, Layer 7 8 Layer board.

Don dalilai na sama, yawancin PCB multilayers an tsara su azaman ko da yadudduka, kuma ƙananan yadudduka sun yi ƙasa.