Ipcb (ibhodi yesekethe eprintiweyo) zingahlulwa ibe PCB engqongqo kunye PCB bhetyebhetye, yangaphambili zingahlulwa zibe ntlobo ezintathu: PCB single-emacaleni, kabini-emacaleni PCB, kunye multi-umaleko PCB. PCBS can be divided into three quality grades based on quality grade: Class 1, Class 2, and Class 3, with 3 of these having the highest requirements. Umahluko kumanqanaba omgangatho we-PCB ukhokelela kwiyantlukwano kubunzima kunye nokuvavanya kunye neendlela zokuhlola. Ukuza kuthi ga ngoku, i-akhawunti engqongqo yamacala amabini kunye ne-PCBS eyahlukeneyo yenani elikhulu lezicelo kwiimveliso ze-elektroniki, kwaye ngamanye amaxesha iiPCBS eziguqukayo zisetyenziswa kwiimeko ezithile. Therefore, this paper will focus on the quality inspection of rigid double-sided and multi-layer PCBs. Emva kokuba i-PCB yenziwe, kufuneka ihlolwe ukujonga ukuba ingaba umgangatho uyahambelana neemfuno zoyilo. It can be considered that quality inspection is an important guarantee of product quality and the smooth implementation of subsequent procedures.

Umgangatho wokuhlola

PCB inspection standards mainly include the following aspects:

A. Imigangatho ebekwe lilizwe ngalinye;

B. Imigangatho yezomkhosi kwilizwe ngalinye;

C. Imigangatho yoshishino efana ne-SJ / T10309;

D. PCB inspection instructions formulated by equipment supplier;

E. Iimfuno zobugcisa eziphawulwe kwimizobo yoyilo yePCB.

For PCBS that have been identified as keyboards in equipment, these key characteristic parameters and indicators must be centralized and checked from the head, in addition to regular inspection. Ezinzwaneni.

Izinto zokuhlola

Nokuba lunjani uhlobo lwePCB, kufuneka benze iindlela ezifanayo zokuhlola umgangatho kunye nezinto. Ngokwendlela yokuhlola, izinto zokuhlola umgangatho zihlala zibandakanya uhlolo olubonakalayo, ukuhlolwa kombane ngokubanzi, ukuhlolwa komsebenzi ngokubanzi, kunye nokuhlolwa kwesinyithi.

• Ukuhlolwa okubonakalayo

Ukuhlolwa okubonakalayo kulula ngokuncediswa ngumlawuli, i-vernier caliper, okanye i-glass magnifying. Uvavanyo lubandakanya:

A. ubukhulu beplate, uburhabaxa bomhlaba, kunye nemfazwe.

B. Inkangeleko kunye nobukhulu bendibano, ngakumbi ubukhulu bendibano ehambelana nezihlanganisi zombane kunye nezikhokelo zesikhokelo.

C. Imfezeko kunye nokucaca kweepateni eziqhubayo kunye nobukho bokuvala ibhulorho emfutshane, evulekileyo, okanye engekhoyo.

D. Umgangatho wobuso, ubukho bemingxunya, ukukrwela, okanye iipinoli kumkhondo oprintiweyo okanye kwiphedi. Location of pad holes and other holes. Imingxunya kufuneka ihlolwe ukuba akukho ukubetha okanye ukubetha okungachanekanga, ububanzi bomngxunya buhlangabezana neemfuno zoyilo, kunye namaqhuqhuva kunye nokushiyeka.

F. Pad quality and firmness, roughness, brightness, and clearance of raised defects.

G. Umgangatho Ukwaleka. The coating flux is uniform and firm, the position is correct, the flux is uniform, and the color meets the requirements.

H. Umgangatho womlinganiswa, nokuba uqinile, ucocekile, kwaye ucocekile, ngaphandle kwemikrwelo, ukungena, okanye ikhefu.

• Ukuhlolwa kokusebenza kombane ngokubanzi

Kukho iimvavanyo ezimbini phantsi kolu hlobo loviwo:

A. Connection performance test. Kolu vavanyo, i-multimeter ihlala isetyenziselwa ukukhangela unxibelelwano lweepateni zokuqhuba ngokujolisa kwisinyithi ngemingxunya ye-PCBS enamacala amabini kunye nokunxibelelana kwee-PCBS ezininzi. Kolu vavanyo, i-PCBCart ibonelela ngokutshekishwa ngokubanzi kwi-PCB nganye eyenziweyo ngaphambi kokuba ishiye indawo yayo yokugcina ukuqinisekisa ukuba imisebenzi yayo esisiseko iyazalisekiswa.

B. Olu vavanyo luyilelwe ukukhangela ukunganyangeki kwenqwelomoya efanayo okanye phakathi kweenqwelomoya ezahlukeneyo ukuqinisekisa ukusebenza kwe-PCB.

• Ukuhlolwa kobugcisa ngokubanzi

General technical inspection includes weldability and electroplating adhesion inspection. Kwangaphambili, jonga ubumanzi be-solder kwipateni eqhubayo. For the latter, it can be checked by qualified tips that are first glued to the plating surface to be examined and then quickly pulled out after being pressed evenly. Okulandelayo, inqwelomoya enesingxobo kufuneka ijongwe ukuqinisekisa ukuba iyaxobuka. Ukongeza, ezinye iitshekhi zinokukhethwa ngokuhambelana nemeko eyiyo, ezinje ngefoyile yobhedu yokulwa namandla okuwa kunye namandla e-anti-tensile.

• Ukunyibilikisa isinyithi ngokuhlola

Umgangatho wemingxunya yensimbi udlala indima ebalulekileyo kwi-PCB enamacala amabini kunye ne-PCB eyahlukeneyo. Inani elikhulu lokungaphumeleli kweemodyuli zombane kunye nezixhobo ezipheleleyo ngenxa yomgangatho wemingxunya yentsimbi. Therefore, it is necessary to pay more attention to the inspection of metalized holes. Ukuhlolwa kwesinyithi kubandakanya le miba ilandelayo:

A. Inqwelomoya yentsimbi yodonga olungena emngxunyeni kufuneka igqibelele kwaye igude, kungabikho nto ingenanto okanye i-nodule.

B. Iipropathi zombane ziya kutshekishwa ngokungqinelana nesekethe emfutshane kunye nevulekileyo yephedi kunye nokumelana phakathi komngxunya wokudlula kunye nokukhokelela kwimetallization yenqwelomoya. After environmental testing, the resistance change rate of the through-hole should not exceed 5% to 10%. Mechanical strength refers to the bonding strength between the metalized through-hole and pad. Uvavanyo lovavanyo lweMetronlographic linoxanduva lokujonga umgangatho wendawo engaphezulu, ubukhulu kunye nokufana komphezulu wesingxobo, kunye namandla omxokelelwane phakathi komphezulu wesingxobo kunye nefoyile yobhedu.

Uvavanyo lweMetallization luhlala ludityaniswa nokuhlolwa okubonakalayo kunye nokuhlolwa koomatshini. Ukuhlolwa okubonakalayo kukujonga ukuba i-PCB ibekwe phantsi kokukhanya nokuba udonga olupheleleyo olugudileyo lubonisa ukukhanya ngokulinganayo. Nangona kunjalo, ukudlula kwiindonga ezinamaqhuqhuva okanye i-voids ayizukuqaqamba. Ukuveliswa kwemveliso ezininzi, ukuhlolwa kufuneka kwenziwe ngezixhobo zovavanyo ezikwi-Intanethi ezinjengokuvavanya inaliti yokubhabha.

Ngenxa yolwakhiwo oluntsonkothileyo lwePCB eyahlukeneyo, kunzima ukufumana iziphene ngokukhawuleza nje ukuba iingxaki zenzeke kwiimvavanyo zendibano zemodyuli elandelayo. Ke ngoko, ukujonga umgangatho wayo kunye nokuthembeka kufuneka kungqongqo kakhulu. Ukongeza kwizinto zokuhlola eziqhelekileyo, ezinye izinto zokuhlola zibandakanya ezi paramitha zilandelayo: ukumelana nomqhubi, ukumelana nomngxuma ngaphakathi, isekethe yangaphakathi emfutshane, kunye nesekethe evulekileyo, ukuxhathisa ukungqinelana phakathi kweengcingo, ukomelela kombane, ukubambelela, ukomelela kukothuka, ukumelana nefuthe, ifuthe loomatshini, amandla akhoyo ngoku, njl. Isalathi ngasinye kufuneka sifumaneke ngokusetyenziswa kwezixhobo ezizodwa kunye neendlela.