- Kungani kudingeka ngenze iphaneli?
Ngemuva kokuklanywa kwe-PCB, kufanele kufakwe i-SMT kulayini womhlangano ukuze unamathisele izingxenye. Ngokwezidingo zokucubungula zomugqa womhlangano, yonke imboni yokucubungula i-SMT izocacisa usayizi ofanele kakhulu weBhodi Yesekethe. Isibonelo, uma ubukhulu buncane kakhulu noma bukhulu kakhulu, ukuhlanganiswa kokulungisa i-PCB kulayini womhlangano akunakulungiswa.
Ngakho-ke uma ubukhulu be-PCB yethu uqobo buncane kunosayizi ochazwe yifektri? Lokho kusho ukuthi kudingeka sihlangane ndawonye amabhodi umjikelezo, amabhodi amaningi wesifunda amaningi esiqeshini esisodwa.
2.Pherel umzekeliso
1) usayizi ohlukile
A. Ukuze kulungiselelwe ukucubungula, ama-veneer Edge of voids noma inqubo kufanele kube yi-Chromring, ngokuvamile eyindilinga eyindilinga engu-5, ipuleti elincane lingashintshwa.
B. PCB ngosayizi webhodi elilodwa ngaphansi kwe-100mm × 70mm izohlanganiswa
2) ukwakheka okungajwayelekile kwe-PCB
I-PCB enesimo esingejwayelekile futhi i-No Panel Board kufanele ingezwe nge-Tooling strip. Uma kunomgodi ku-PCB enkulu kune noma ulingana no-5mm × 5mm, umgodi kufanele uqedwe kuqala ekwakhiweni ukuze ugweme ukuguquguquka kwe-mantineineer nepuleti ngesikhathi sokufudumala. Ingxenye egcwalisiwe kanye nengxenye ye-PCB yasekuqaleni kufanele ixhunywe ngamaphoyinti amaningana ohlangothini olulodwa futhi isuswe ngemuva kokudlala kwama-wave.
Lapho ukuxhumana phakathi kwe-Tooling Trip ne-PCB kungumbuso obunjiwe v, ibanga phakathi konqenqema lwangaphandle lwedivayisi ne-PCB yomgodi we-v2mm;
3.Iphaneli
Ukuqondiswa kwephaneli kuzokwakhelwe ngokufana nasekuqondisweni konqenqemeni lokudluliselwa, ngaphandle kwalapho usayizi ungakwazi ukufeza izidingo zosayizi ongenhla wepaneli.it ngokuvamile imigqa ye- "v-cut" noma amabhodi amabili amade).
Ibhodi enobumba okhethekile, naka ukuxhumana phakathi kwebhodi elingaphansi nebhodi elingaphansi, zama ukwenza ukuxhumana kwesinyathelo ngasinye kuhlukaniswe umugqa.
Amanothi angama-4 we-PCB Panel
Ngokuvamile, ukukhiqizwa kwe-PCB kuzokwenza ukubizwa okubizwa ngokuthi yi-Penelization Ukukhulisa ukusebenza kahle kokukhiqizwa komugqa wokukhiqiza i-SMT. Imiphi imininingwane okufanele ibhekele emhlanganweni we-PCB? Sicela ubheke lezo njengoba zingezansi:
1) Uhlaka lwangaphandle (onqenqemeni lwe-clamping) lwephaneli ye-PCB kufanele yakhelwe e-loop evaliwe ukuze uqinisekise ukuthi iphaneli ye-PCB ngeke iguqulwe lapho ihlelwe kusona.
2) ukwakheka kwephaneli ye-PCB kudinga ukuvalwa ngangokunokwenzeka, kunconyelwe ukusebenzisa 2 × 2, 3 × 3, ...... iphaneli, kepha akukho ukwenza ibhodi elehlukile (yin-yang).
3) Ububanzi be-panel usayizi ≤260mm (i-Nokia line) noma ≤300mm (umugqa we-fuji). Uma kudingeka ukusabalalisa okuzenzakalelayo, ububanzi be-X ubude ≤125mm × 180mm ngosayizi wephaneli.
4) Ibhodi ngalinye elincane kuPCB Panel lizoba nezimbobo ezimbili zokuthola amathuluzi, i-3≤ mboze ububanzi
5) Ibanga eliphakathi phakathi kweBhodi Elincane kufanele lilawulwe phakathi kuka-75mm no-145mm.
6) Lapho usetha umgodi wethebula lereferensi, kuvamile ukushiya indawo evulekile ye-welding 1.5mm enkulu emgodini wokufaka amathuluzi.
7) Akufanele kube namadivayisi amakhulu noma amadivaysi afudumele eduze kwendawo yokuxhuma phakathi kohlaka lwangaphandle lwephaneli nephaneli yangaphakathi, naphakathi kwephaneli nephaneli. Ngaphandle kwalokho, kufanele kube khona isikhala esingaphezu kwe-0.5mm phakathi kwezakhi kanye nomkhawulo webhodi le-PCB ukuqinisekisa ukusebenza okujwayelekile kwethuluzi lokusika.
8) Izimbobo ezine zokuthenga ezinobubanzi be-4mm ± 0.01mm zivulwe emakhoneni amane enhlanganisela yangaphandle yephaneli.
9) Ngokuyinhloko, i-QFP enezikhala ezingaphansi kuka-0,65mm kufanele isethwe endaweni yayo ye-diagonal.Izimpawu zokubeka indawo esetshenziselwa isigatshana se-PCB soMkhandlu.
I-10) Izingxenye ezinkulu zizoba nokubeka okuthunyelwe noma izimbobo zokuma, ezifana ne-I / OL I-interface, imakrofoni, isikhombimsebenzisi sebhethri, i-MicroShone, i-headphone jack, motor, njll.