Kodi mungazindikire bwanji zolakwika zosaoneka za PCBA momveka bwino?
Miyezo Yoyendera X-RAY
1. Zolumikizira za BGA solder zilibe chotchinga:
Miyezo yoweruza: yovomerezeka pamene chochotsera chili chochepera theka la kuzungulira kwa solder pad; Ngati chochotsera chili chachikulu kuposa kapena chofanana ndi theka la kuzungulira kwa solder pad, chidzakanidwa.
2. Zolumikizira za BGA solder zilibe short circuit:
Zofunikira pakuweruza: Ngati palibe kulumikizana kwa tin pakati pa zolumikizira za solder, ndikovomerezeka; Ngati pali kulumikizana kwa solder pakati pa zolumikizira za solder, iyenera kukanidwa.
3. Zolumikizira za BGA zopanda mabowo:
Zofunikira pa chiweruzo: Malo opanda kanthu osakwana 20% ya malo onse a cholumikizira cholumikizira ndi ovomerezeka; Ngati malo opanda kanthu ndi akulu kuposa kapena ofanana ndi 20% ya malo onse a cholumikizira cholumikizira, chidzakanidwa.
4. Palibe kusowa kwa tin mu malo olumikizira BGA solder:
Zofunikira pakuweruza: Vomerezani pamene mipira yonse yachitsulo ikuwonetsa kukula kokwanira, kofanana komanso kofanana; Ngati kukula kwa mpira wachitsulo ndi kochepa kwambiri poyerekeza ndi mipira ina yachitsulo yozungulira, iyenera kukanidwa.
5. Muyezo wowunikira wa E-PAD ya QFP/QFN class chips pazinthu zina ndi wakuti malo a tin ayenera kukhala opitilira 60% ya malo onse (ma gridi anayi ophatikizidwa pamodzi akusonyeza kusungunula bwino), ndipo chiŵerengero cha zitsanzo ndi 20%.
1. Cholinga cha mayeso: Mabodi a PCBA okhala ndi BGA/LGA ndi zida zomangira pansi;
2. Kuchuluka kwa mayeso:
① Pambuyo pa kusinthaku, ogwira ntchito zaukadaulo amatsimikiza ngati bolodi loyamba la solder phala ndi malo oikira pamwamba pa BGA ali ndi zolakwika zilizonse zopatuka, kenako amapitiliza kudutsa m'chipindacho atatsimikizira kuti palibe mavuto;
② Ogwira ntchito zaukadaulo amatsimikizira ngati pali vuto lililonse ndi BGA soldering ya bolodi loyamba la solder phala atadutsa m'chipindamo, kenako n’kuliyika mu kupanga ngati palibe vuto;
③ Pa nthawi yogwira ntchito, antchito osankhidwa ndi omwe ali ndi udindo woyesa, ndipo ngati maoda a ≤ 100pcs, 100% ayenera kuyesedwa mokwanira; 101-1000pcs ayenera kuyesedwa kuti akhale 30%, maoda opitilira 1001 ayenera kuyesedwa kuti akhale 20%;
④ Pa nthawi yopangira zinthu, IPQC imachita mayeso oyesa zitsanzo pa zidutswa ziwiri zazikulu pa ola limodzi;
⑤ Zinthuzo ziyenera kuyesedwa mokwanira 100% ndipo zithunzi ziyenera kusungidwa 100%.
3. Ngati pali zolakwika zilizonse, zithunzi ziyenera kusungidwa, ndipo mtundu wa BOM, nambala ya barcode ndi zotsatira za mayeso a chinthu choyesedwa ziyenera kulembedwa mu Fomu Yolembera Mayeso a X-Ray. Onjezani zithunzi zosokedwa za QFP ndi QFN grounding pads, ndikusunga zithunzi 100%.
4. Ngati pali zolakwika zilizonse panthawi yoyesa, ziyenera kufotokozedwa nthawi yomweyo kwa mkulu wa bungwe ndi mainjiniya kuti zitsimikizidwe.
Katswiri Wofufuza Wanzeru wa X-ray Wamafakitale
Dongosolo la zida za X-RAY makamaka limapangidwa ndi magawo asanu ndi awiri: gwero la X-ray laling'ono, gawo lojambula zithunzi, dongosolo lokonza zithunzi za pakompyuta, dongosolo la makina, dongosolo lowongolera magetsi, dongosolo loteteza chitetezo ndi dongosolo lochenjeza. Limaphatikiza mayeso osawononga, ukadaulo wa mapulogalamu apakompyuta, ukadaulo wopeza ndi kukonza zithunzi ndi ukadaulo wotumizira zithunzi, womwe umaphimba magawo anayi akuluakulu aukadaulo wa kukonza zithunzi za kuwala, makina, zamagetsi ndi digito. Kudzera mu kusiyana kwa kuyamwa kwa ma X-ray ndi zinthu zosiyanasiyana, kapangidwe ka mkati mwa chinthucho kamajambulidwa ndipo kuzindikira zolakwika zamkati kumachitika. Chithunzi chozindikira cha chinthucho chikhoza kuwonedwa nthawi yeniyeni kuti mudziwe ngati pali zolakwika, mitundu ya zolakwika ndi milingo yokhazikika yamakampani mkati mwa chinthucho. Nthawi yomweyo, dongosolo lokonza zithunzi za pakompyuta limagwiritsidwa ntchito kusunga ndi kukonza zithunzi kuti ziwongolere kuwonekera bwino kwa chithunzi ndikuwonetsetsa kulondola kwa kuwunika. Limatha kuyeza thovu pazida zamagetsi zopakidwa monga BGA ndi QFN, ndipo limathandizira miyeso ya geometric monga mtunda, ngodya, mainchesi, ndi polygon. Limatha kupeza mosavuta kuzindikira malo ambiri, kulola zinthu kutuluka mufakitale popanda zolakwika.
