Ungawabona kanjani ngokucacile amaphutha angabonakali we-PCBA?

I-X-RAY Inspection Standards

1. I-BGA solder joints ayinayo i-offset:
Indlela yokwahlulela: eyamukelekayo uma i-offset ingaphansi kwengxenye yesiyingi se-solder pad; Uma i-offset inkulu noma ilingana nengxenye yesiyingi se-solder pad, izonqatshwa.

2. I-BGA solder joints ayinayo isifunda esifushane:
Indlela yokwahlulela: Uma kungekho ukuxhumana kwe-tin phakathi kwamalunga e-solder, kuyamukeleka; Uma kukhona ukuxhumana kwe-solder phakathi kwamalunga e-solder, kuzonqatshwa.

3. BGA amalunga solder ngaphandle voids:
Indlela yokwahlulela: Indawo engenalutho engaphansi kuka-20% yendawo yonke yejoyinti le-solder iyamukeleka; Uma indawo engenalutho inkulu noma ilingana no-20% wendawo yonke yejoyinti le-solder, izonqatshwa.

4. Akukho ukushoda kwethini kumajoyinti e-solder e-BGA:
Indlela yokwahlulela: Yamukela uma wonke amabhola kathayela ekhombisa osayizi abagcwele, abafaniswayo nabahambisanayo; Uma ubukhulu bebhola likathayela lincane kakhulu uma liqhathaniswa namanye amabhola ethayela elizungezile, kufanele lenqatshwe.

5. Izinga lokuhlola i-grounding pad E-PAD yamachips ekilasi le-QFP/QFN leminye imikhiqizo ukuthi indawo yethayela kufanele ibe nkulu kuno-60% wendawo yonke (amagridi amane ahlanganiswe ndawonye abonisa ukusoda okuhle), kanye nesilinganiso sesampula. ngu-20%.

1. Inhloso yokuhlola: amabhodi e-PCBA ane-BGA/LGA kanye nezingxenye zephedi eliphansi;

2. Imvamisa yokuhlola:

① Ngemuva koshintsho, abasebenzi bezobuchwepheshe baqinisekisa ukuthi ibhodi lokuqala lokunamathisela i-solder kanye ne-BGA surface mount inamaphutha yini, bese iqhubeka nokudlula ekamelweni ngemva kokuqinisekisa ukuthi azikho izinkinga;

② Abasebenzi bezobuchwepheshe bayaqinisekisa ukuthi zikhona yini izinkinga ngokuthengiswa kwe-BGA kwebhodi lokunamathisela le-solder lokuqala ngemva kokudlula ekamelweni, bese belibeka ekukhiqizeni uma zingekho izinkinga;

③ Ngesikhathi sokukhiqiza okuvamile, abasebenzi abaqokiwe banesibopho sokuhlola, futhi uma ama-oda angu-≤ 100pcs, 100% azohlolwa ngokugcwele; Ama-101-1000pcs azothathwa amasampula angama-30%, ama-oda angaphezu kuka-1001pcs azothathwa ngo-20%;

④ Phakathi nenqubo evamile yokukhiqiza, i-IPQC yenza izivivinyo zesampula ezicucu ezingu-2 ezinkulu ngehora;

⑤ Imikhiqizo kufanele ihlolwe ngokugcwele 100% futhi izithombe kufanele zilondolozwe 100%.

3. Uma kukhona ukukhubazeka, izithombe kufanele zigcinwe, futhi imodeli ye-BOM, inombolo ye-serial yekhodi yebha kanye nemiphumela yokuhlolwa yomkhiqizo ohloliwe kufanele kurekhodwe Efomini Lerekhodi Lokuhlola Le-X-Ray. Engeza izithombe ezihlanganisiwe ze-QFP kanye namaphedi aphansi e-QFN, bese ulondoloza u-100% wezithombe.

4. Uma kukhona ukukhubazeka ngesikhathi sokuhlolwa, kufanele kubikwe ngokushesha kumphathi kanye nonjiniyela wezinqubo ukuze kuqinisekiswe.

Isazi Sokuhlola Esihlakaniphile Se-X-ray

Uhlelo lwemishini ye-X-RAY ngokuyinhloko luqukethe izingxenye eziyisikhombisa: umthombo we-X-ray we-micro focus, iyunithi yokucabanga, uhlelo lokucubungula izithombe zekhompyutha, isistimu yemishini, uhlelo lokulawula ugesi, uhlelo lokuvikela ukuphepha kanye nesistimu yesixwayiso. Ihlanganisa ukuhlola okungonakali, ubuchwepheshe besofthiwe yekhompiyutha, ukutholwa kwezithombe & nobuchwepheshe bokucubungula kanye nobuchwepheshe bokudlulisa ngomshini, okuhlanganisa imikhakha emine emikhulu yezobuchwepheshe yokucutshungulwa kwesithombe sokubona, okomshini, ugesi kanye nedijithali. Ngomehluko wokumuncwa kwama-X-ray ngezinto ezihlukene, ukwakheka kwangaphakathi kwento kwenziwa isithombe bese kutholwa ukukhubazeka kwangaphakathi. Isithombe sokutholwa komkhiqizo singabonwa ngesikhathi sangempela ukuze kunqunywe ukuthi kukhona yini ukukhubazeka, izinhlobo zokukhubazeka kanye namazinga ajwayelekile embonini ngaphakathi komkhiqizo. Ngesikhathi esifanayo, isistimu yokucubungula izithombe zekhompyutha isetshenziselwa ukugcina nokucubungula izithombe ukuze kuthuthukiswe ukucaca kwesithombe nokuqinisekisa ukunemba kokuhlola. Ingakwazi ukulinganisa amabhamuza ngokuzenzakalela ezintweni ezipakishiwe ze-elekthronikhi njenge-BGA ne-QFN, futhi isekela izilinganiso zejiyomethri njengebanga, i-engeli, ububanzi, nepholygoni. Ingakwazi ukuthola kalula ukutholwa kokuma kwamaphuzu amaningi, ivumele imikhiqizo ukuthi ishiye imboni inoziro.