1. Usayizi we-PCB
【Incazelo Engemuva】Usayizi wePCBkunqunyelwe amandla emishini yomugqa wokukhiqiza osebenza nge-elekthronikhi.Ngakho-ke, usayizi we-PCB ofanele kufanele ucatshangelwe ekwakhiweni kwesikimu sohlelo lomkhiqizo.
(1) Ubukhulu besayizi ye-PCB engafakwa umshini we-SMT bususelwa kusayizi ojwayelekile weshidi le-PCB, iningi lawo elingu-20″×24″, okungukuthi, 508mm×610mm (ububanzi besitimela)
(2) Usayizi onconywayo uwusayizi ofanayo wesisetshenziswa ngasinye emugqeni wokukhiqiza we-SMT, ohambisana nokusebenza kahle kokukhiqiza kwesisetshenziswa ngasinye kanye nokuqedwa kwezingqinamba zemishini.
(3) Kuma-PCB anosayizi omncane, kufanele yakhelwe njengesibopho sokuthuthukisa ukusebenza kahle kokukhiqiza kwawo wonke umugqa wokukhiqiza.
【Izidingo zokuklama】
(1) Ngokuvamile, ubukhulu bobukhulu be-PCB kufanele bube nomkhawulo phakathi kwebanga elingu-460mm×610mm.
(2) Ububanzi obunconywayo bukasayizi (200~250)mm×(250~350)mm, futhi ukubukeka kwesilinganiso kufanele kube ngu-<2.
(3) NgePCB enosayizi “125mm×125mm”, kufanele yenziwe usayizi ofanele.
2. PCB shape
[Incazelo Engemuva] Izinto zokukhiqiza ze-SMT zisebenzisa izinsimbi zokuqondisa ukuthutha ama-PCB, futhi ama-PCB anomumo ongajwayelekile awakwazi ukuthuthwa, ikakhulukazi ama-PCB anamanotshi emakhoneni.
【Izidingo zokuklama】
(1) Ukuma kwe-PCB kufanele kube isikwele esivamile esinamakhona ayindilinga.
(2) Ukuze kuqinisekiswe ukuzinza kwenqubo yokudlulisela, indlela yokufaka kufanele icatshangelwe ukuguqula i-PCB emise ngendlela engavamile ibe yisimo esiyisikwele esijwayelekile, ikakhulukazi izikhala zekhoneni kufanele zigcwaliswe ukuze kugwenywe imihlathi yokudambisa igagasi phakathi nenqubo yokudlulisela.Ibhodi lekhadi eliphakathi.
(3) Kumabhodi e-SMT amsulwa, izikhala zivunyelwe, kodwa usayizi wegebe kufanele ube ngaphansi kwengxenye eyodwa kwezintathu yobude bohlangothi.Kulabo abeqa lesi sidingo, uhlangothi lwenqubo yokuklama kufanele lugcwaliswe.
(4) Idizayini ekhangayo yomunwe wegolide ayidingeki nje kuphela ukuze uklame i-chamfering ohlangothini lokufakwayo, kodwa futhi nokuklama (1~1.5)×45° i-chamfering nhlangothi zombili zepulaki ebhodini ukuze kube lula ukufakwa.
3. Uhlangothi lokudlulisela
[Incazelo Engemuva] Usayizi wonqenqema oludlulisayo uncike ezidingweni zomhlahlandlela wokuhambisa wezinto zokusebenza.Emishinini yokuphrinta, imishini yokubeka kanye nezithando zokushisa ezigeleza kabusha, unqenqema oludlulisayo ngokuvamile ludingeka ukuba lube ngaphezu kuka-3.5mm.
【Izidingo zokuklama】
(1) Ukuze kuncishiswe ukuwohloka kwe-PCB ngesikhathi sokudayiswa, isiqondiso esiseceleni eside se-PCB engafakwanga ngokuvamile sisetshenziswa njengendlela yokudlulisela;ngokufakwa, isiqondiso esiseceleni eside kufanele futhi sisetshenziswe njengendlela yokudlulisela.
(2) Ngokujwayelekile, izinhlangothi ezimbili ze-PCB noma isiqondiso sokudlulisa sisetshenziswa njengohlangothi lokudlulisela.Ububanzi obuncane bohlangothi lokudlulisela ngu-5.0mm.Akumele kube khona izingxenye noma amajoyinti e-solder ngaphambili nangemuva ohlangothini lokudlulisela.
(3) Ohlangothini olungathumeli, awukho umkhawulo kumpahla ye-SMT, futhi kuhle kakhulu ukubekisa indawo evimbela ingxenye engu-2.5mm.
4. Imbobo yokubeka
[Incazelo Yasemuva] Izinqubo eziningi ezinjengokucubungula ukufakwa, ukuhlanganisa, nokuhlola zidinga ukuma okunembile kwe-PCB.Ngakho-ke, izimbobo zokubeka ngokuvamile ziyadingeka ukuze zenziwe.
【Izidingo zokuklama】
(1) Ku-PCB ngayinye, kufanele kuklanywe okungenani izimbobo ezimbili zokumisa, eyodwa iklanywe njengesiyingi, futhi enye iklanywe njengomsele omude.Owokuqala usetshenziselwa ukubeka futhi owakamuva usetshenziselwa isiqondiso.
Asikho isidingo esikhethekile sembobo yokuma, ingaklanywa ngokuya ngemininingwane yefektri yakho, futhi amadayamitha anconyiwe angu-2.4mm no-3.0mm.
Izimbobo zokubeka kuzokuba yizimbobo ezingezona ezensimbi.Uma i-PCB iyi-PCB ebhontshiwe, imbobo yokumisa kufanele yakhelwe ngepuleti lembobo ukuze kuthuthukiswe ukuqina.
Ubude bembobo yomhlahlandlela ngokuvamile buwububanzi obuphindwe kabili.
Isikhungo sembobo yokuma kufanele sibe ngaphezu kuka-5.0mm ukusuka ohlangothini lokudlulisela, futhi izimbobo zokubeka ezimbili kufanele zibe kude ngangokunokwenzeka.Kunconywa ukuwahlela emakhoneni aphambene we-PCB.
(2) Kuma-PCB axubile (ama-PCBA anama-plug-in afakiwe, indawo yemigodi yokumisa kufanele ifane nengaphambili nangemuva, ukuze umklamo we-tooling wabiwe phakathi kwangaphambili nangemuva, njengesikulufu. ubakaki ongezansi ungasetshenziswa futhi kuthreyi ye-plug-in.
5. Izimpawu zokuma
[Incazelo Engemuva] Imishini yokubeka yesimanje, imishini yokunyathelisa, imishini yokuhlola i-optical inspection (AOI), okokusebenza kokuhlola unamathisele we-solder (SPI), njll. yonke isebenzisa amasistimu okubeka amehlo.Ngakho-ke, izimpawu zokuma okubonakalayo kufanele zakhelwe ku-PCB.
【Izidingo zokuklama】
(1) Izimpawu zokuma zihlukaniswe ngezimpawu zokuma komhlaba jikelele (i-Global Fiducial) kanye nezimpawu zendawo (I-Fiducial yendawo)
I-Fiducial).Eyangaphambili isetshenziselwa ukubeka ibhodi lonke, kanti lena yokugcina isetshenziselwa ukubeka amabhodi amancane noma izingxenye ze-fine-pitch.
(2) Izimpawu zokuma kwe-Optical zingaklanywa njengezikwele, amadayimane, imibuthano, iziphambano, imithombo, njll., ezinobude obungu-2.0mm.Ngokuvamile, kunconywa ukuthi udizayine iphethini yencazelo yethusi eyindilinga ye-Ø1.0m.Uma kucatshangelwa umehluko phakathi kombala obalulekile nendawo ezungezile, indawo engadayisi ngo-1mm enkulu kunophawu lokuma optical igciniwe, futhi azikho izinhlamvu ezivunyelwe kuyo.Ezintathu ebhodini elifanayo Ukuba khona noma ukungabi khona kwe-foil yethusi kungqimba lwangaphakathi kufanele kube okufanayo ngaphansi kwesimboli.
(3) Endaweni ye-PCB enezingxenye ze-SMD, kunconywa ukuthi uhlele izimpawu ezintathu zokuma kwe-optical ekhoneni lebhodi ukuze kubekwe i-stereo ye-PCB (amaphuzu amathathu anquma indiza, futhi ukushuba kokunamathisela kwe-solder kungatholwa) .
(4) Ekubekeni, ngaphezu kokuba nezimpawu ezintathu zokuma kwe-optical ebhodini lonke, kungcono ukudizayina izimpawu zokuma ezimbili noma ezintathu zokuma endaweni ekhoneni elimelene leyunithi ngayinye yebhodi.
(5) Kumadivayisi afana ne-QFP anebanga eliphakathi nendawo eliholayo elingu-≤0.5mm kanye ne-BGA enebanga elimaphakathi elingu-≤0.8mm, izimpawu zokuma kwendawo yokubona kufanele zisethwe kudiagonali ukuze kumiswe kahle.
(6) Uma kunezingxenye ezigxunyekiwe nhlangothi zombili, uhlangothi ngalunye kufanele lube nezimpawu zokuma kokubona.
(7) Uma ingekho imbobo yokuma ku-PCB, indawo emaphakathi yophawu lokuma kwamehlo kufanele ibe ngaphezu kuka-6.5mm kude nohlangothi lokudlulisela lwe-PCB.Uma kunembobo yokuma ku-PCB, indawo emaphakathi yophawu lokuma kwendawo kufanele yakhelwe eceleni kwembobo yokuma eduze nendawo emaphakathi ye-PCB.
Isikhathi sokuthumela: Apr-08-2023