Ainihin tsari naPCB kewaye allonƙira a cikin sarrafa guntu na SMT yana buƙatar kulawa ta musamman.Ɗaya daga cikin manyan dalilai na ƙirar ƙirar da'ira shine samar da tebur na cibiyar sadarwa don ƙirar hukumar da'ira ta PCB da kuma shirya tushen ƙirar hukumar PCB.Tsarin zane na allon da'irar PCB mai nau'i-nau'i iri ɗaya ne da matakan ƙira na allon PCB na yau da kullun.Bambance-bambancen shine cewa ana buƙatar aiwatar da wayoyi na siginar siginar tsaka-tsaki da rarrabuwar layin lantarki na ciki.Idan aka haɗu, ƙirar allon da'irar PCB mai nau'i-nau'i iri ɗaya ne.An raba zuwa matakai masu zuwa:
1. Shirye-shiryen allon kewayawa ya ƙunshi tsara girman jiki na hukumar PCB, nau'in marufi na abubuwan da aka gyara, hanyar shigar da kayan aikin, da tsarin hukumar, wato allunan Layer Layer, allunan Layer biyu, da Multi-Layer. alluna.
2. Saitin siga na aiki, galibi yana nufin saitin ma'auni na aiki da saitin siga mai aiki.Daidaitaccen saiti mai ma'ana na sigogin yanayi na PCB na iya kawo babban dacewa ga ƙirar hukumar da'ira da haɓaka ingantaccen aiki.
3. Tsarin sassa da daidaitawa.Bayan an gama aikin farko, ana iya shigo da tebur na cibiyar sadarwa cikin pcb, ko kuma ana iya shigo da teburin cibiyar sadarwa kai tsaye a cikin zanen tsari ta hanyar sabunta pcb.Tsarin sassa da daidaitawa sune ingantattun ayyuka masu mahimmanci a ƙirar PCB, waɗanda kai tsaye ke shafar ayyukan da suka biyo baya kamar wayoyi da rarrabuwar wutar lantarki na ciki.
4. Saitunan ƙa'idar wiring galibi suna saita ƙayyadaddun ƙayyadaddun bayanai daban-daban don yin wayoyi, kamar faɗin waya, tazarar layi ɗaya, nisan aminci tsakanin wayoyi da pads, da ta girman.Ko ta wace hanya aka yi amfani da wayoyi, dokokin wiring sun zama dole.Matakin da ba makawa, kyawawan ka'idojin wayoyi na iya tabbatar da amincin hanyar zirga-zirgar jirgi, bi ka'idodin tsarin samarwa, da adana farashi.
5. Sauran ayyukan taimako, irin su rufin tagulla da cika hawaye, da sarrafa takardu kamar fitar da rahoto da adana bugu.Ana iya amfani da waɗannan fayilolin don dubawa da gyara allon kewayawa na PCB, kuma ana iya amfani da su azaman jerin abubuwan da aka saya.
Dokokin tafiyar da sashin
1. Ba a yarda da wiring a cikin yanki ≤1mm daga gefen PCB board kuma a cikin 1mm a kusa da rami mai hawa;
2. Ya kamata layin wutar lantarki ya kasance mai faɗi kamar yadda zai yiwu kuma kada ya kasance ƙasa da 18mil;fadin layin siginar kada ya zama ƙasa da mil 12;shigar da layin CPU da fitarwa kada ya zama ƙasa da mil 10 (ko 8mil);tazarar layin bai kamata ya zama ƙasa da mil 10 ba;
3. Al'ada ta ramuka ba kasa da 30mil;
4. Dual in-line plug: pad 60mil, budewar 40mil;1/4W resistor: 51 * 55mil (0805 surface mount);lokacin da aka toshe shi, kushin 62mil, budewar 42mil;na'ura maras amfani da capacitor: 51*55mil (0805 surface mount);Lokacin shigar da kai tsaye, kushin yana 50mil kuma diamita na rami shine 28mil;
5. Kula da cewa layin wutar lantarki da wayoyi na ƙasa ya kamata su kasance kamar radial kamar yadda zai yiwu, kuma kada a yi amfani da layin sigina a cikin madaukai.