A cikin samarwa da sarrafa PCBA na motoci, wasu allunan da'ira suna buƙatar mai rufi da tagulla. Rufin jan karfe na iya rage tasirin samfuran sarrafa facin SMT yadda ya kamata akan haɓaka ikon hana tsangwama da rage yankin madauki. Za'a iya amfani da ingantaccen tasirin sa cikakke a cikin sarrafa facin SMT. Duk da haka, akwai abubuwa da yawa da ya kamata a kula da su yayin aikin zubar da tagulla. Bari in gabatar muku da cikakkun bayanai game da tsarin sarrafa tagulla na PCBA.
一. Tsarin zubewar tagulla
1. Pretreatment part: Kafin m jan karfe zubo, da PCB hukumar bukatar pretreated, ciki har da tsaftacewa, tsatsa cire, tsaftacewa da sauran matakai don tabbatar da tsabta da santsi na hukumar surface da aza mai kyau harsashi ga m jan karfe zuba.
. Amfanin shi ne cewa kauri da daidaituwa na fim ɗin jan karfe za a iya sarrafawa da kyau.
. Har ila yau, yana daya daga cikin hanyoyin da za a yi amfani da tagulla, amma farashin samar da kayayyaki ya fi yadda ake yin tagulla, don haka za ku iya zaɓar yin amfani da shi da kanku.
4. Copper shafi da lamination: Yana da mataki na ƙarshe na dukan aikin shafi na jan karfe. Bayan an gama yin platin tagulla, ana buƙatar damƙar foil ɗin tagulla a saman allon kewayawa don tabbatar da cikakken haɗin kai, ta yadda za a tabbatar da aiki da amincin samfurin.
二. Matsayin murfin jan karfe
1. Rage rashin ƙarfi na waya na ƙasa kuma inganta ikon hana tsangwama;
2. Rage raguwar ƙarfin lantarki da inganta ƙarfin wutar lantarki;
3. Haɗa zuwa waya ta ƙasa don rage yankin madauki;
三. Kariya don zubowar tagulla
1. Kada ku zuba jan karfe a cikin bude wuri na wiring a tsakiyar Layer na multilayer board.
2. Domin haɗin kai-daya zuwa filaye daban-daban, hanyar ita ce haɗi ta hanyar 0 ohm resistors ko magnetic beads ko inductor.
3. Lokacin fara ƙirar ƙirar waya, ya kamata a yi amfani da waya ta ƙasa da kyau. Ba za ku iya dogara da ƙara ta hanyar ba bayan kun zuba tagulla don kawar da filayen ƙasa marasa haɗin gwiwa.
4. Zuba jan karfe kusa da oscillator crystal. The crystal oscillator a cikin da'irar ne mai high-mita watsi da hayaki. Hanyar ita ce a zuba tagulla a kusa da oscillator na crystal, sannan a niƙa harsashin oscillator na crystal daban.
5. Tabbatar da kauri da daidaituwar layin jan karfe. Yawanci, kauri daga cikin kauri na jan karfe yana tsakanin 1-2oz. Layer na jan karfe wanda yayi kauri ko sirara zai shafi aikin gudanarwa da ingancin watsa sigina na PCB. Idan Layer na jan karfe ba daidai ba ne, zai haifar da tsangwama da asarar siginar kewayawa a kan allon kewayawa, yana shafar aiki da amincin PCB.