Sizobhekana nezinkinga ezihlukahlukene zesikhala sokuphepha ekwakhiweni okuvamile kwe-PCB, njengesikhala phakathi kwe-vias namaphedi, kanye nesikhala phakathi kokulandela umkhondo nokulandelelwa, okuyizinto zonke okufanele sizicabangele.
Sihlukanisa lezi zikhala zibe izigaba ezimbili:
Ukugunyazwa kokuphepha kukagesi
Imvume yokuphepha okungeyona ekagesi
1. Ibanga lokuphepha likagesi
1. Isikhala phakathi kwezintambo
Lesi sikhala sidinga ukucabangela umthamo wokukhiqiza womkhiqizi we-PCB.Kutuswa ukuthi isikhala phakathi kweminonjana singabi ngaphansi kuka-4mil.Isikhala esincane somugqa siphinde sibe sikhala phakathi komugqa uye kumugqa kanye nesikhala somugqa kuya kuphedi.Ngakho-ke, ngokombono wokukhiqiza kwethu, yiqiniso, inkulu kuba ngcono uma kungenzeka.Ngokuvamile, i-10mil evamile ivame kakhulu.
2. Indawo yokuvula iphedi nobubanzi bephedi
Ngokomkhiqizi we-PCB, uma indawo yokuvula iphedi ibholwa ngomshini, ubuncane akumele bube ngaphansi kuka-0.2mm.Uma kusetshenziswa i-laser drilling, kunconywa ukuthi okungenani kungabi ngaphansi kuka-4mil.Ukubekezelela imbobo kuhluke kancane kuye ngepuleti, ngokuvamile kungalawulwa ngaphakathi kuka-0.05mm, futhi ububanzi bephedi obuncane akumele bube ngaphansi kuka-0.2mm.
3. Isikhala phakathi kwephedi nephedi
Ngokwekhono lokucubungula lomkhiqizi we-PCB, kunconywa ukuthi ibanga phakathi kwephedi nephedi lingabi ngaphansi kuka-0.2mm.
4. Ibanga phakathi kwesikhumba sethusi kanye nomphetho webhodi
Ibanga phakathi kwesikhumba sethusi esishajiwe kanye nomphetho webhodi le-PCB kungcono lingabi ngaphansi kuka-0.3mm.Uma kuyindawo enkulu yethusi, ngokuvamile idinga ukuhoxiswa onqenqemeni lwebhodi, ngokuvamile isethwe ku-20mil.
Ngaphansi kwezimo ezijwayelekile, ngenxa yokucatshangelwa kwemishini kwebhodi lesifunda eliqediwe, noma ukugwema ukugoqa noma izikhindi zikagesi ezibangelwa ithusi eliveziwe emaphethelweni ebhodi, onjiniyela bavame ukushwabanisa amabhulokhi ethusi asendaweni enkulu ngamamitha angu-20 uma kuqhathaniswa nomphetho webhodi. .Isikhumba sethusi asihlali sisakazwa emaphethelweni ebhodi.Kunezindlela eziningi zokubhekana nalolu hlobo lwe-copper shrinkage.Isibonelo, dweba ungqimba lokugcina onqenqemeni lwebhodi, bese usetha ibanga phakathi kwe-copper paving kanye ne-keepout.
2. Ibanga lokuphepha elingelona ugesi
1. Ububanzi bezinhlamvu nobude nesikhala
Mayelana nezinhlamvu zesikrini sikasilika, ngokuvamile sisebenzisa amanani avamile afana no-5/30 6/36 mil nokunye.Ngoba uma umbhalo umncane kakhulu, ukuphrinta okucutshunguliwe kuzofiphaliswa.
2. Ibanga ukusuka kusikrini sikasilika ukuya kuphedi
Isikrini sikasilika asivunyelwe ukubeka phezu kwephedi, ngoba uma isikrini sikasilika simbozwe ngephedi, isikrini sikasilika ngeke sifakwe i-tinning ngesikhathi sokuthungatha, okuzothinta ukufakwa kwengxenye.
Ngokuvamile, ifekthri yebhodi idinga isikhala esingu-8mil ukuze sigcinwe.Uma kungenxa yokuthi amanye amabhodi e-PCB aqinile, asikwazi ukwamukela iphimbo elingu-4mil.Khona-ke, uma isikrini sikasilika sivala ngephutha iphedi ngesikhathi sokuklama, ifektri yebhodi izosusa ngokuzenzakalelayo ingxenye yesikrini sikasilika esishiywe kuphedi ngesikhathi sokukhiqiza ukuze kuqinisekiswe ukuthi iphedi ifakwe ithini.Ngakho kudingeka sinake.
3. Ubude be-3D nesikhala esivundlile esakhiweni esiwumshini
Uma ukhweza izingxenye ku-PCB, cabanga ukuthi kuzoba khona yini ukungqubuzana nezinye izakhiwo zemishini endaweni evundlile kanye nokuphakama kwesikhala.Ngakho-ke, ekwakhiweni, kuyadingeka ukucabangela ngokugcwele ukuguquguquka kwesakhiwo sesikhala phakathi kwezingxenye, naphakathi kwe-PCB eqediwe negobolondo lomkhiqizo, futhi ugcine ibanga eliphephile lento ngayinye eqondiwe.