Ukucutshungulwa kokubekwa kwe-SMT, ngesilinganiso kubizwa ngokuthi ulayini wokuphila wendawo yokucubungula ukubekwa, ezinye izinkampani kufanele zifinyelele ku-95% ngesilinganiso sifinyelela kumugqa ojwayelekile, ngakho-ke ngenani eliphakeme neliphansi, elibonisa amandla obuchwepheshe emboni yokucubungula ukubekwa, ikhwalithi yenqubo. , ngesilinganiso singathuthukisa ukusebenza kahle kwamandla enkampani, ukunciphisa izindleko zokukhiqiza, i-Z ibalulekile ukuze ikwazi ukuletha ukuzinza, ukuthuthukisa ukwaneliseka kwamakhasimende.
Incazelo yesilinganiso esiqondile
Izinga lokufinyelela izinga lokuthumela ngesikhathi esisodwa.
Izinga eliqondile (I-First Pass Yield, FPY) lisho ngokuqondile: inani lemikhiqizo emihle ephumelele zonke izivivinyo okokuqala ngqa inqubo ifakwa kumasethi ayi-100 wama-PCB emugqeni wokukhiqiza.Ngakho-ke, ngemva kokusebenza kabusha komugqa wokukhiqiza noma ukulungisa ukuze uphumelele imikhiqizo yokuhlola, hhayi ingxenye yokubala kwesilinganiso esiqondile.
Yiziphi izici ezithinta isilinganiso esiqondile
1. izinto zokwakha (kufaka phakathi izinto ezisetshenziswayo ze-elekthronikhi ezahlukahlukene ekuqaleni, kufaka phakathi amabhodi e-PCB)
2. unamathisele solder
3. izinga kanye nengqondo yabasebenzi
Indlela yokuthuthukisa nokuthuthukisa izinga eliqondile
Izinga eliqondile lihlobene nenzuzo kanye nendlela yokuphila yebhizinisi, ngakho-ke imboni ngayinye yama-chip ibamba ukuthuthukiswa nokuthuthukiswa kwezinga eliqondile, u-100% ngeke akwazi ukufinyelela, kodwa futhi unethemba lokuba nangaphezulu kuka-98%.
Ngakho-ke, ungathuthukisa izinga eliqondile ngokusebenzisa ezinye zezixhumanisi ezilandelayo.
1. Lungiselela umklamo we-stencil webhodi le-pcb
Ngaphezulu kuka-70% wekhwalithi yokushisela enqubweni yokuphrinta ye-solder unama, okuyimboni ye-SMT ifingqa idatha yesipiliyoni, ukuphrinta kwe-solder paste kuyinqubo yenqubo ye-smt Z yangaphambili, i-solder paste offset, ithiphu yokudonsa, ukuwa, ezimweni eziningi i-stencil design amaphutha, i-stencil ingase ibe nkulu kakhulu / izimbobo ezincane, imbobo ye-stencil odongeni ibe rough, njll. izobangela okubi okukhulunywe ngenhla, okuholela ku-pcb pads on the unama kubi, okuholela ekushiseni Okubi, ngaleyo ndlela kuthinte i-straight-through. isilinganiso.
2. Khetha uhlobo olulungile lokunamathisela kwe-solder
I-solder paste iyinhlanganisela yezinsimbi ezihlukahlukene kanye nama-fluxes, afana ne-toothpaste, i-solder paste ihlukaniswe yaba yi-5, 3 nezinye izinhlobo ezahlukene zokunamathisela i-solder, imikhiqizo ehlukene idinga ukukhetha ukunamathisela okuhlukile kokuphrinta.
Isihloko esinemininingwane mayelana ne-solder paste
SMT chip processing lapho izinhlobo solder unama, ukugcinwa kanye nokusetshenziswa ukuqonda okuyisisekelo imvelo
3. Lungisa i-Umshini wokuphrinta we-SMTi-squeegee angle, ingcindezi
Ingcindezi ye-scraper yomshini wokuphrinta, i-engeli izothinta izici zokunamathisela kwe-solder, ingcindezi inkulu, izobangela ukunamathiswa kwe-solder encane, futhi okuphambene nalokho, i-angle Z enhle ingama-degrees angu-45-60.
4. Geza kabusha ihhaviniijika lokushisa
Ngokusho kwemikhiqizo ehlukene, lungisa isikhathi sokushisa, ukushisa kabusha ijika, usebenzisa umhloli wokushisa wesithando somlilo, eduze nezinga lokushisa langempela lokukhiqiza, bese uthola ijika lokushisa lesithando somlilo, bese ulungisa ijika lokushisa lesithando somlilo, ukuze izinga lokushisa lomlilo. ijika ngokuhambisana ne-solder paste kanye nezidingo zokudayiswa komkhiqizo.
Isikhathi sokuthumela: Feb-17-2022