Ishicilelwe ibhodi yesekethe (I-PCB) inokwahlulahlulwa ibe yi-PCB engqongqo kunye ne-PCB eguqukayo, eyokuqala inokwahlulahlulwa ibe ziindidi ezintathu: i-PCB enamacala amabini, i-PCB enamacala amabini kunye ne-PCB emininzi. According to the quality grade, PCB can be divided into three quality grades: 1, 2 and 3, of which 3 is the highest requirement. Umahluko kumanqanaba omgangatho we-PCB ukhokelela kubunzima kunye nantlukwano kwiindlela zokuvavanya kunye nokuhlola.

Ukuza kuthi ga ngoku, ii-PCBS ezingqindilili ezinamacala amabini kunye nokwahlulahlula okuninzi kuhleli uluhlu olukhulu lwezicelo kwi-elektroniki, kunye nePCBS eguqukayo ngamanye amaxesha isetyenziswa kwezinye iimeko. Ke ngoko, eli phepha liza kugxila kuvavanyo lomgangatho we-PCB enamacala amabini kunye ne-multi-layer PCB. Emva kokuveliswa kwePCB, uhlolo kufuneka lwenziwe ukumisela ukuba umgangatho uyahlangabezana neemfuno zoyilo. It can be said that quality inspection is an important guarantee to ensure the quality of products and the smooth implementation of subsequent procedures.

Umgangatho wokuhlola

Imigangatho yokuhlola i-PCB ikakhulu ibandakanya le miba ilandelayo:

A. Imigangatho ebekwe lilizwe ngalinye;

B. Imigangatho yezomkhosi kwilizwe ngalinye;

Imigangatho yoshishino, njenge-SJ / T10309;

D. Imiyalelo yokuhlolwa kwePCB equlunqwe ngumthengisi wezixhobo;

E. Iimfuno zobugcisa eziphawulwe kumzobo we-PCB yoyilo.

Kwi-PCBS ezichongwe njengezibalulekileyo kwizixhobo, ezi paramitha zibalulekileyo kunye nezalathi kufuneka zivavanywe ukusuka entloko kuye kuzwaneni ukongeza kuhlolo oluqhelekileyo.

Izinto zokuhlola

Nokuba lunjani uhlobo lwePCB, kufuneka badlule kwiindlela ezifanayo zokuhlola umgangatho kunye neenkqubo. According to the inspection method, the quality inspection items usually include appearance inspection, general electrical performance inspection, general technical performance inspection and metal coating inspection.

• Ukuhlolwa kwenkangeleko

Ukuhlolwa okubonakalayo kulula ngokuncediswa ngumlawuli, i-vernier caliper, okanye i-glass magnifying. Izinto ezihloliweyo zibandakanya:

Ukutyeba, uburhabaxa bomhlaba kunye nokulwa kweplate.

Ukubonakala kunye nobukhulu bendibano, ngakumbi imilinganiselo yendibano ehambelana nezihlanganisi zombane kunye neerayile zesikhokelo.

C.Umanyano kunye nokucaca kwendlela yokuqhuba, nokuba ngaba kukho iibhulorho ezifutshane, iisekethe ezivulekileyo, iiburrs okanye izikhewu.

D.Umgangatho womphezulu, nokuba kukho imingxunya, imikrwelo okanye iiphini ezifowunwayo okanye iipads.

E. Indawo yemingxuma yepali kunye neminye imingxunya. Jonga ukuba ngaba imingxunya ilahlekile okanye igqojoziwe ngokuchanekileyo, nokuba ubukhulu bayo imingxunya iyahlangabezana neemfuno zoyilo nokuba ngaba kukho amaqhuqhuva nezikhewu.

F. Umgangatho kunye nokuqina kwepad yokutyabeka, uburhabaxa, ukukhanya kunye nokushiyeka kweziphene eziphakanyisiweyo.

G. Umgangatho Ukwaleka. Ukuhamba kwe-Electroplating kuyunifomu, kuqinile, indawo ichanekile, ukuhamba kuyunifomu, umbala wayo uhambelana neemfuno ezifanelekileyo.

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

• Ukuhlolwa kwentsebenzo kombane rhoqo

Zimbini iintlobo zovavanyo phantsi kolu hlobo lokutshekisha:

Uvavanyo lwentsebenzo yoqhagamshelo. During this test, a multimeter is usually used to check the connectivity of the conductive pattern, with emphasis on the metallized perforations of double-sided PCBS and the connectivity of multi-layer PCBS. Kolu vavanyo, umenzi we-PCB uya kubonelela ngokuhlolwa rhoqo kwe-PCB nganye esele ikhethiwe ngaphambi kokuba ishiye indawo yokugcina izinto ukuqinisekisa ukuba imisebenzi yayo esisiseko iyazalisekiswa.

B. Uvavanyo lomsebenzi wokuvala. Olu vavanyo luyilelwe ukujonga ukunganyangeki kwi-moya enye okanye phakathi kweenqwelomoya ezahlukeneyo ukuqinisekisa ukusebenza kwe-PCB.

• Ukuhlolwa kobugcisa ngokubanzi

Ukuhlolwa ngokubanzi kobugcisa kugubungela ukuthengiswa kunye nokuhlolwa kokunamathela. Kwangaphambili, jonga ubumanzi be-solder kwipateni eqhubayo. Okokugqibela, ukuvavanywa kunokwenziwa ngeengcebiso ezifanelekileyo ezinamathele kuqala kumphezulu wesingxobo ukuze zihlolwe kwaye zisuswe ngokukhawuleza nasemva kokucinezela. Okulandelayo, inqwelomoya enesingxobo kufuneka ijongwe ukuqinisekisa ukuba iyaxobuka. Ukongeza, ezinye iindlela zokuhlola zinokuchongwa ngokuhambelana nemeko eyiyo, njengamandla okuwa kwefoyile yobhedu kunye nokunyibilikisa isinyithi ngamandla okomeleleyo.

• Ukunyibilikisa isinyithi ngokuhlola

Umgangatho we-metallized ngokusebenzisa imingxunya kubaluleke kakhulu kwi-PCB enamacala amabini kunye ne-PCB eyahlukeneyo. Ukusilela okuninzi kweemodyuli ze-elektroniki kunye nezixhobo zonke ngenxa yomgangatho wemingxunya yesinyithi. Ke ngoko, kufuneka uhlawule ngakumbi kuhlolo lweemetallized ngokusebenzisa imingxunya. Inqwelomoya yodonga lomngxunya iya kugqitywa, igudise kwaye ingenamoya okanye amaqhuqhuva amancinci ngokujonga isinyithi esigubungela le miba ilandelayo.

B. Iipropathi zombane kufuneka zijongwe ngokungqinelana nesekethe emfutshane kunye nevulekileyo yephedi kunye nesinyithi ngombhobho wokungqengqa, kunye nokumelana phakathi komngxunya wokungqengqa kunye nelothe.

C. Emva kovavanyo lokusingqongileyo, inqanaba lotshintsho lomngxunya kwimbobo yomngxunya akufuneki lidlule kwi-5% ukuya kwi-10%.

D. Amandla oomatshini abhekisa kumandla okudibanisa phakathi komngxunya wesinyithi kunye nephedi.

E. Uvavanyo lweMetronlographic lovavanyo lokujonga umgangatho wokutyabeka, ukutyeba ubukhulu kunye nokufana, kunye namandla wokubambelela phakathi kwetyathanga kunye nefoyile yobhedu.

Ukunyibilikisa isinyithi ngokuhlola kuhlala kuyindibanisela yovavanyo olubonakalayo kunye novavanyo loomatshini. Ukuhlolwa okubonakalayo kubandakanya ukuveza i-PCB ekukhanyeni nasekuboneni ukuba ngaba udonga olungagungqiyo, olugudileyo olungena emngxunyeni lubonisa ukukhanya ngokulinganayo. Nangona kunjalo, iindonga eziqukethe amaqhuqhuva okanye i-voids aziyi kukhanya kakhulu. Kwimveliso yevolumu, isixhobo sokuhlola esisemgceni (umzekelo, uvavanyo lwenaliti ephaphazelayo) kufuneka sisetyenziswe.

Ngenxa yolwakhiwo oluntsonkothileyo lwee-PCBS ezininzi, kunzima ukufumana iziphene ngokukhawuleza xa iingxaki zifunyenwe ngexesha lovavanyo lweyunithi yemodyuli elandelayo. Ngenxa yoko, ukuhlolwa komgangatho wayo kunye nokuthembeka kufuneka kube nzima kakhulu. Ukongeza kwizinto zokuhlola eziqhelekileyo, ezinye izinto zokuhlola zikwabandakanya ezi paramitha zilandelayo: ukumelana nomqhubi, ukunyibilikisa isinyithi ngokumelana nomngxunya, isekethe yangaphakathi emfutshane kunye nesekethe evulekileyo, ukumelana nokugquma phakathi kwemigca, amandla okubambelela, ukunamathela, ukumelana nefuthe lokufudumeza, umatshini amandla empembelelo, amandla akhoyo ngoku, njl. Isalathi ngasinye kufuneka sifunyanwe kusetyenziswa izixhobo ezizodwa kunye neendlela.