Kunezindawo eziningi ngaphakathiPCB designlapho kufanele kubhekwe izikhala eziphephile. Lapha, ihlukaniswa okwesikhashana izigaba ezimbili: esisodwa esokuhlukaniswa kwezokuphepha okuhlobene nogesi, esinye siyisikhala sokuphepha esingahlobene nogesi.
Isikhala sokuphepha esihlobene nogesi
1.Isikhala phakathi kwezintambo
Ngokuqondene namandla okucubungula we-mainstreamAbakhiqizi be-PCBOkubalulekile, isikhala esincane phakathi kwezintambo akufanele sibe ngaphansi kuka-4mil. Ibanga eliphansi lezintambo futhi liyibanga ukusuka kocingo kuye kocingo kanye nocingo kuye kuphedi. Ngokombono wokukhiqiza, okukhudlwana kuba ngcono uma kungenzeka, futhi i-10mil iyinto evamile.
2.Imbobo yephedi nobubanzi bephedi
Ngomthamo wokucubungula wabakhiqizi be-PCB abajwayelekile, indawo yokuvula iphedi akufanele ibe ngaphansi kuka-0.2mm uma ibholwa ngomshini, kanye no-4mil uma ibholwa nge-laser. Ukubekezelelana kokuvula kuhluke kancane ngokusho kwepuleti, ngokuvamile kungalawulwa ngaphakathi kwe-0.05mm, ububanzi obuncane bephedi akufanele bube ngaphansi kuka-0.2mm.
3.Isikhala phakathi kwephedi
Mayelana nomthamo wokucubungula wabakhiqizi be-PCB abajwayelekile, isikhala phakathi kwamaphedi akufanele sibe ngaphansi kuka-0.2mm.
4.Ibanga phakathi kwethusi nonqenqema lwepuleti
Isikhala phakathi kwesikhumba sethusi esishajiwe kanye nomphetho weIbhodi le-PCBakufanele kube ngaphansi kuka-0.3mm. Ekhasini lohlaka Lwebhodi Lemithetho-yemiklamo, setha umthetho wokuhlukanisa le nto.
Uma kubekwe indawo enkulu yethusi, ngokuvamile kuba nebanga lokushwabana phakathi kwepuleti nonqenqema, ngokuvamile elibekwe ku-20mil. Embonini yokuklama neyokukhiqiza ye-PCB, ngaphansi kwezimo ezijwayelekile, ngenxa yokucatshangelwa kwemishini kwebhodi lesifunda eliqediwe, noma ukugwema isikhumba sethusi sivezwe onqenqemeni lwebhodi kungase kubangele ukugoqeka noma ukujikeleza kukagesi, onjiniyela bazovame ukusabalalisa indawo enkulu ye-copper block ehlobene nomkhawulo webhodi shrinkage 20mil, kunokuba isikhumba sethusi sisakazwe emaphethelweni ebhodi.
Lokhu kuhlehlisa ngethusi kungasingathwa ngezindlela ezihlukahlukene, njengokudweba ungqimba lokugcina onqenqemeni lwepuleti, bese ubeka ibanga phakathi kwethusi ne-keepout. Indlela elula yethulwa lapha, okungukuthi, amabanga ahlukene okuphepha asethelwe izinto zokubeka ithusi. Isibonelo, ibanga lokuphepha lebhodi lonke lisethelwe ku-10mil, futhi ukubeka kwethusi kusethelwe ku-20mil, okungafinyelela umphumela wokunciphisa u-20mil ngaphakathi konqenqema lwebhodi futhi kususe ithusi elifile okungenzeka likhona kudivayisi.
Isikhala sokuphepha esingahlobene nogesi
1. Ububanzi bezinhlamvu, ubude kanye nesikhala
Azikho izinguquko ezingenziwa ekucutshungulweni kwefilimu yombhalo, kodwa ububanzi bemigqa yezinhlamvu ezingaphansi kuka-0.22mm (8.66mil) ku-D-CODE kufanele kubhalwe ngokugqamile kube ngu-0.22mm, okungukuthi, ububanzi bemigqa ye- izinhlamvu L = 0.22mm (8.66mil).
Ububanzi balo lonke uhlamvu ngu-W = 1.0mm, ukuphakama kwalo lonke uhlamvu H = 1.2mm, futhi isikhala phakathi kwezinhlamvu ngu-D = 0.2mm. Uma umbhalo ungaphansi kwezinga elingenhla, ukucubungula ukuphrinta kuzofiphaliswa.
2.Isikhala phakathi kwe-Vias
Isikhala phakathi kwembobo (VIA) ukuya embobeni (umphetho ukuya onqenqemeni) kufanele kube sikhulu kuno-8mil.
3.Ibanga ukusuka ekuphrintiwe kwesikrini ukuya kuphedi
Ukuphrinta isikrini akuvunyelwe ukumboza iphedi. Ngoba uma ukuphrinta kwesikrini kumbozwe ngephedi ye-solder, ukuphrinta kwesikrini ngeke kube sethini lapho ithini livuliwe, okuzophazamisa ukukhwezwa kwengxenye. Ifekthri yebhodi jikelele idinga ukuthi izikhala eziyi-8mil zigodliwe nazo. Uma ibhodi le-PCB lilinganiselwe endaweni, ukukhala kwezikhala okungu-4mil akwamukeleki. Uma ukuphrinta kwesikrini kumbozwe ngephutha kuphedi ngesikhathi sokuklama, imboni yepuleti izosusa ngokuzenzakalelayo ukuphrinta kwesikrini kuphedi ngesikhathi sokukhiqiza ukuze kuqinisekiswe ithini kuphedi.
Kunjalo, indlela yecala ngalinye ngesikhathi sokuklama. Ngezinye izikhathi ukuphrinta kwesikrini kugcinwa ngamabomu eduze kwephedi, ngoba lapho amaphedi amabili eseduze komunye nomunye, ukuphrinta kwesikrini phakathi kungavimbela ngokuphumelelayo uxhumano lwe-solder isifunda esifushane ngesikhathi sokushisela, okungenye icala.
4.Mechanical 3D ubude kanye nesikhala ovundlile
Lapho ufaka izingxenye ku-PCB, kuyadingeka ukucabangela ukuthi isiqondiso esivundlile nokuphakama kwesikhala kuzongqubuzana nezinye izakhiwo zemishini. Ngakho-ke, ekwakhiweni, kufanele sicabangele ngokugcwele ukuhambisana phakathi kwezingxenye, phakathi kwemikhiqizo eqediwe ye-PCB negobolondo lomkhiqizo, kanye nesakhiwo sendawo, futhi sigcine izikhala eziphephile zento ngayinye eqondiwe ukuze siqinisekise ukuthi akukho ukungqubuzana emkhathini.
