Ainihin tsari na Kwamitin PCB ƙira a cikin sarrafa guntu na SMT yana buƙatar kulawa ta musamman. Daya daga cikin manyan dalilai na zayyana tsarin tsarin da’ira shi ne samar da jerin gwano don zayyana hukumar da’ira ta PCB, da kuma shirya tushen tsarin zayyana hukumar pcb. Tsarin zane na allunan da’ira na PCB da yawa iri ɗaya ne da na allunan PCB na yau da kullun. Bambance-bambancen shine cewa ana buƙatar aiwatar da hanyar jigilar siginar siginar tsaka-tsaki da rarrabuwar layin lantarki na ciki. Gabaɗaya, ƙirar allon da’irar PCB mai yawan Layer an raba shi zuwa matakai masu zuwa:

1. Shirye-shiryen na’ura mai mahimmanci shine don tsara girman jiki na allon pcb, nau’i na marufi na bangaren, hanyar hawan kayan aiki, da tsarin Layer, wato, allo mai layi daya, allon Layer biyu da Multi-Layer allon.

2. Saitin sigina na aiki galibi yana nufin saitin ma’auni na aiki da saitin siga mai aiki. Kafa ma’auni na yanayin pcb daidai da kuma dacewa zai iya kawo matukar dacewa ga ƙirar hukumar da’ira da inganta aikin aiki.

3. Tsarin sassa da daidaitawa. Bayan an shirya lokacin aikin na yanzu, ana iya shigo da jerin yanar gizo cikin pcb, ko kuma ana iya shigo da jerin net ɗin kai tsaye a cikin ƙirar ƙira ta sabunta pcb. Tsarin sassa da daidaitawa sune ayyuka mafi mahimmanci a ƙirar PCB, waɗanda ke shafar ayyuka kai tsaye kamar wayoyi masu zuwa da rarraba Layer na lantarki na ciki.

4. An tsara ka’idojin wiring, musamman don saita ƙayyadaddun ƙayyadaddun hanyoyin sadarwa, faɗin waya, tazarar layi ɗaya, nisan aminci tsakanin wayoyi da pads, kuma ta hanyar girma, da dai sauransu, komai yadda aka ɗauki hanyar wiring, ƙa’idodin wiring suna da makawa. . Mataki mai mahimmanci, ƙa’idodin wayoyi masu kyau na iya tabbatar da amincin hanyoyin zirga-zirgar da’ira, da biyan buƙatun tsarin masana’antu, adana farashi.

5. Sauran ayyukan taimako, kamar ajiyar tagulla da cika hawaye, da kuma aikin 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.

Ka’idojin wayoyi na sashi

1. Zana yankin waya a cikin 1mm daga gefen allon PCB, kuma a cikin 1mm a kusa da rami mai hawa, an haramta wayoyi;

2. Ya kamata igiyar wutar lantarki ta kasance mai faɗi kamar yadda zai yiwu kuma kada ta kasance ƙasa da 18mil; fadin layin siginar kada ya zama ƙasa da mil 12; shigar da cpu da layin fitarwa kada su kasance ƙasa da mil 10 (ko 8mil); tazarar layin bai kamata ya zama ƙasa da mil 10 ba;

3. Al’ada ta hanyar ba ta kasa da 30mil;

4. Dual in-line: pad 60mil, aperture 40mil; 1 / 4W juriya: 51 * 55mil (0805 saman dutse); lokacin cikin layi, pad 62mil, budewa 42mil; na’ura maras amfani da capacitor: 51*55mil (0805 surface mount); Lokacin cikin layi, kushin shine 50mil kuma buɗewar shine 28mil;

5. Lura cewa layin wutar lantarki da layin ƙasa ya kamata ya zama radial kamar yadda zai yiwu, kuma layin sigina ba dole ba ne a madauki.