Ukulawulwa Kwenqubo ye-PCBA kanye Nokulawulwa Kwekhwalithi Yamaphuzu Abalulekile angu-6

Inqubo yokukhiqiza ye-PCBA ibandakanya ukukhiqizwa kwebhodi le-PCB, ukuthengwa kwezingxenye kanye nokuhlola, ukucubungula ama-chip, ukucubungula i-plug-in, ukushiswa kohlelo, ukuhlola, ukuguga kanye nochungechunge lwezinqubo, uchungechunge lokuhlinzeka nokukhiqiza lude uma kuqhathaniswa, noma yikuphi ukukhubazeka kusixhumanisi esisodwa kuzodala inani elikhulu lebhodi le-PCBA elibi, okuholela emiphumeleni engathi sína.Ngakho-ke, kubaluleke kakhulu ukulawula yonke inqubo yokukhiqiza ye-PCBA.Lesi sihloko sigxile ezicini ezilandelayo zokuhlaziya.

1. Ukukhiqizwa kwebhodi le-PCB

Ama-oda we-PCBA atholiwe abanjwe umhlangano wangaphambi kokukhiqiza kubaluleke kakhulu, ikakhulukazi ifayela le-PCB Gerber lokuhlaziywa kwenqubo, futhi okuhloswe kumakhasimende ukuletha imibiko yokwenziwa, amafektri amaningi amancane awagxili kulokhu, kodwa ngokuvamile athambekele ezinkingeni zekhwalithi ezibangelwa i-PCB empofu. ukuklama, okuholela enanini elikhulu lomsebenzi wokuvuselela nokulungisa.Ukukhiqiza nakho, udinga ukucabanga kabili ngaphambi kokuthi wenze futhi wenze umsebenzi omuhle kusenesikhathi.Ngokwesibonelo, lapho uhlaziya amafayela PCB, kwezinye ezincane futhi othambekele ekuhlulekeni impahla, qiniseka ukuthi ugwema izinto eziphakeme ku-layout isakhiwo, ukuze ikhanda lensimbi rework lula ukusebenza;Isikhala sembobo se-PCB kanye nobudlelwano obuthwala umthwalo webhodi, akubangeli ukugoba noma ukuphuka;ukufaka izintambo ukuthi kucatshangelwe ukuphazamiseka kwesignali yemvamisa ephezulu, i-impedance nezinye izici ezibalulekile.

2. Ukuthengwa kwempahla kanye nokuhlolwa

Ukuthengwa kwengxenye kudinga ukulawula okuqinile kwesiteshi, kufanele kube okuvela kubahwebi abakhulu kanye nokuthathwa kwasefekthri kwangempela, 100% ukugwema izinto ezisetshenziswayo kanye nezinto ezingamanga.Ngaphezu kwalokho, setha izikhundla ezikhethekile zokuhlola izinto ezingenayo, ukuhlolwa okuqinile kwezinto ezilandelayo ukuze uqinisekise ukuthi izingxenye azinawo amaphutha.

I-PCB:reflow ovenukuhlolwa kwezinga lokushisa, ukuvinjelwa kwemigqa endizayo, noma ngabe imbobo ivinjiwe noma uyinki ovuzayo, noma ngabe ibhodi ligobile, njll.

I-IC: hlola ukuthi ingabe isikrini sikasilika ne-BOM ziyafana ncamashi, futhi zenza izinga lokushisa elingashintshi kanye nomswakama.

Ezinye izinto ezijwayelekile: hlola isikrini sikasilika, ukubukeka, inani lokulinganisa amandla, njll.

Izinto zokuhlola ngokuhambisana nendlela yesampula, ingxenye engu-1-3% ngokujwayelekile

3. I-Patch processing

Ukuphrinta kokunamathisela kwe-Solder kanye nokulawula ukushisa kwe-ovini okugeleza kabusha kuyiphuzu eliyisihluthulelo, isidingo sokusebenzisa ikhwalithi enhle futhi sihlangabezane nezidingo zenqubo ye-laser stencil ibaluleke kakhulu.Ngokwezidingo ze-PCB, ingxenye yesidingo sokwandisa noma ukunciphisa imbobo ye-stencil, noma ukusetshenziswa kwezimbobo ezimise u-U, ngokwezidingo zenqubo yokukhiqiza ama-stencil.Izinga lokushisa likahhavini lokudayiswa kabusha kanye nokulawulwa kwejubane kubalulekile ekungeneni kokunamathisela kwe-solder nokuthembeka kwe-solder, ngokusho kwemihlahlandlela evamile yokusebenza ye-SOP yokulawula.Ngaphezu kwalokho, isidingo ukuqaliswa esiqinileUmshini we-SMT AOIukuhlola ukuze kuncishiswe isici somuntu esibangelwa ububi.

4. Ukufakwa kokucubungula

Inqubo yokuxhuma, yokwakheka kwesikhunta esinamagagasi angaphezu kwamagagasi yiphuzu elibalulekile.Indlela yokusebenzisa isikhunta ingakhulisa amathuba okuhlinzeka ngemikhiqizo emihle ngemva kwesithando somlilo, okungukuthi onjiniyela be-PE kumele baqhubeke nokuzilolonga kanye nesipiliyoni kule nqubo.

5. Ukudubula uhlelo

Embikweni wokuqala we-DFM, ungasikisela kukhasimende ukuthi lihlele amaphuzu athile okuhlola (Amaphuzu Okuhlola) ku-PCB, inhloso ukuhlola i-PCB kanye nokuqhutshwa kwesekethe ye-PCBA ngemva kokuhlanganisa zonke izingxenye.Uma kunezimo, ungacela ikhasimende ukuthi linikeze uhlelo futhi lishise uhlelo kusilawuli esikhulu se-IC ngokusebenzisa izimbawula (ezifana ne-ST-LINK, J-LINK, njll.), ukuze ukwazi ukuhlola izinguquko zokusebenza ezilethwa ngezenzo zokuthinta ezihlukahlukene ngendlela enembile, futhi ngaleyo ndlela ihlole ubuqotho bokusebenza kwayo yonke i-PCBA.

6. Ukuhlolwa kwebhodi le-PCBA

Kuma-oda anezidingo zokuhlola ze-PCBA, okuqukethwe kokuhlolwa okuyinhloko kuqukethe i-ICT (In Circuit Test), FCT (Function Test), Burn In Test (ukuhlolwa kokuguga), ukuhlolwa kwezinga lokushisa nomswakama, ukuhlolwa kokwehla, njll., ngokuqondile ngokokuhlolwa kwekhasimende. ukusebenza kohlelo kanye nedatha yombiko wesifinyezo kungaba.