- Me yasa ake buƙatar yin panel?
Bayan ƙirar PCB, ya kamata a shigar da SMT akan layin taro don haɗa abubuwan haɗin gwiwa. Dangane da bukatun sarrafawa na layin taro, kowane masana'antar sarrafa SMT za ta ƙayyade girman da ya dace da allon kewayawa. Alal misali, idan girman ya yi ƙanƙara ko babba, ba za a iya gyara kayan aiki don gyara pcb a kan layin taro ba.
Don haka idan girman PCB ɗinmu kanta ya yi ƙasa da girman da masana'anta suka ƙayyade? Wannan yana nufin muna bukatar mu yanki tare da kewaye allon, mahara kewaye allon zuwa daya yanki.Dukansu ga high - gudun hawa da igiyar ruwa soldering iya muhimmanci inganta yadda ya dace.
2.Panel Illustration
1) Girman zayyani
A. Domin sauƙaƙe sarrafawa, gefen veneer na voids ko tsari yakamata ya zama R chamfering, gabaɗaya mai zagaye % diamita 5, ana iya daidaita ƙaramin faranti.
B. PCB tare da girman allo guda ƙasa da 100mm × 70mm za a haɗa su
2) Siffar da ba ta dace ba don PCB
PCB mai siffar da ba ta dace ba kuma babu allon panel da yakamata a ƙara da tsiri na kayan aiki. Idan akwai rami a kan PCB mafi girma ko daidai da 5mm × 5mm, rami ya kamata a fara kammala shi a cikin ƙira don guje wa nakasar mantineer da farantin karfe yayin walda. Ya kamata a haɗa ɓangaren da aka kammala da ainihin ɓangaren PCB ta maki da yawa a gefe ɗaya kuma a cire su bayan sayar da igiyar ruwa.
Lokacin da haɗin tsakanin kayan aiki da PCB shine tsagi mai siffar v, nisa tsakanin gefen waje na na'urar da tsagi mai siffar v shine ≥2mm; Lokacin da haɗin tsakanin gefen tsari da PCB shine rami mai hatimi, babu na'ura. ko za a shirya kewaye a cikin 2mm na ramin hatimi.
3.Panel
Za a tsara jagorancin panel a cikin layi daya zuwa gefen gefen watsawa, sai dai inda girman ba zai iya cika bukatun girman girman da ke sama ba. Ana buƙatar yawan adadin "v-cut" ko Layukan ramin hatimi bai kai ko daidai da 3 ba (sai dai alluna guda masu tsayi da sirara).
Na musamman-siffar allo, kula da alaka tsakanin sub-board da sub-board, kokarin yin dangane da kowane mataki rabu a cikin wani layi.
4.Wasu bayanin kula don PCB panel
Gabaɗaya, samar da PCB zai aiwatar da aikin da ake kira Panelization don haɓaka haɓakar samar da layin samar da SMT. Menene cikakkun bayanai ya kamata a kula da su a cikin taron PCB? Da fatan za a duba waɗannan kamar a ƙasa:
1) Za a tsara firam ɗin waje (ƙuƙwalwar gefen) na PCB panel a cikin rufaffiyar madauki don tabbatar da cewa PCB panel ba zai lalace ba lokacin da aka gyara shi zuwa ga daidaitawa.
2) PCB panel siffar bukatar murabba'i a matsayin kusa kamar yadda zai yiwu , shawarar yin amfani da 2 × 2, 3 × 3,…… panel, amma babu yin bambanci hukumar ( yin-yang).
3) Nisa girman Panel ≤260mm (Layin SIEMENS) ko ≤300mm (Layin FUJI). Idan ana buƙatar rarrabawa ta atomatik, nisa x tsawon ≤125mm × 180mm don girman panel.
4) Kowane ƙaramin allo a cikin PCB panel zai sami akalla ramukan kayan aiki guda uku, 3≤ rami diamita ≤ 6mm, wiring ko SMT ba a yarda da shi a cikin 1mm na ramin kayan aiki na gefen.
5) Ya kamata a sarrafa nisa na tsakiya tsakanin ƙananan jirgi tsakanin 75mm da 145mm.
6) Lokacin saita ramin kayan aiki, yana da yawa don barin buɗaɗɗen yanki mai girman 1.5mm mafi girma a kusa da ramin kayan aiki.
7) Kada a sami manyan na'urori ko na'urori masu tasowa kusa da mahaɗin da ke tsakanin firam ɗin waje da panel na ciki, da kuma tsakanin panel da panel. Bayan haka, yakamata a sami sarari fiye da 0.5mm tsakanin abubuwan da aka gyara da gefen allon PCB don tabbatar da aikin yau da kullun na kayan aikin yanke.
8) An buɗe ramukan kayan aiki guda huɗu tare da diamita na rami na 4mm ± 0.01mm a kusurwoyi huɗu na firam na waje na panel. Ƙarfin rami ya kamata ya zama matsakaici don tabbatar da cewa ba zai karye ba yayin aiwatar da babba da ƙasa. farantin; Budewa da daidaiton matsayi yakamata ya zama babba, bangon rami santsi ba tare da burr ba.
9) A ka'ida, QFP tare da tazarar kasa da 0.65mm ya kamata a saita shi a cikin matsayi na diagonal. Za a yi amfani da alamomin matsayi da aka yi amfani da su don PCB subboard na taron a cikin nau'i-nau'i, an tsara su a kan abubuwan da aka tsara.
10) Manyan abubuwan da aka gyara zasu sami matsayi na matsayi ko ramuka, kamar I/O interface, makirufo, dubawar baturi, microswitch, jackphone, moto, da sauransu.