Idizayini Yebhodi Lesifunda Ephrintiwe
Ibhodi lesifunda le-SMT lingenye yezingxenye ezibalulekile ekwakhiweni kwe-surface mount.Ibhodi lesifunda le-SMT liwukusekelwa kwezingxenye zesekethe namadivayisi emikhiqizweni kagesi, eqaphela ukuxhumana kukagesi phakathi kwezingxenye zesekethe namadivayisi.Ngokuthuthuka kobuchwepheshe be-elekthronikhi, Umthamo wamabhodi we-PCB uya uba mncane futhi ube mncane, ukuminyana kuya ngokuya kukhuphuka, futhi izingqimba zamabhodi e-PCB zikhula njalo.Ngakho-ke, ama-PCB adingeka ukuthi abe nezidingo eziphakeme neziphakeme ngokuya ngesakhiwo sonke, ikhono lokulwa nokuphazamiseka, inqubo kanye nokwenziwa.
Izinyathelo eziyinhloko ze-PCB design;
1: Dweba umdwebo wohlelo.
2: Ukwakhiwa komtapo wolwazi wengxenye.
3: Sungula ubudlelwano bokuxhumana kwenethiwekhi phakathi komdwebo wohlelo kanye nezingxenye ebhodini eliphrintiwe.
4: Izintambo kanye nesakhiwo.
5: Dala ukukhiqizwa kwebhodi eliphrintiwe futhi usebenzise idatha nokukhiqizwa kokubeka nokusebenzisa idatha.
Izinkinga ezilandelayo kufanele zicatshangelwe ohlelweni lokuklama amabhodi esekethe aphrintiwe:
Kudingekile ukuqinisekisa ukuthi ihluzo zezingxenye kumdwebo wesimiso sesifunda zihambisana nezinto zangempela nokuthi ukuxhumeka kwenethiwekhi kumdwebo we-circuit schematic diagram kulungile.
Ukuklanywa kwamabhodi wesifunda aphrintiwe akubheki nje kuphela ubudlelwano bokuxhumana kwenethiwekhi yomdwebo we-schematic, kodwa futhi kucubungula ezinye izidingo zobunjiniyela besifunda.Izidingo zobunjiniyela besifunda ngokuyinhloko ububanzi bezintambo zamandla, izintambo zomhlabathi nezinye izintambo, ukuxhunywa kwemigqa, nezinye izici ze-High-frequency zezingxenye, ukuvinjelwa kwezingxenye, ukulwa nokuphazamiseka, njll.
Izidingo zokufakwa kwesistimu yonke yebhodi lesifunda ephrintiwe ikakhulukazi zicabangela izimbobo zokufaka, amapulaki, izimbobo zokubeka, amaphuzu okubhekisela, njll.
Kumele ihlangabezane nezidingo, ukubekwa kwezingxenye ezihlukahlukene kanye nokufakwa okunembile endaweni eshiwo, futhi ngesikhathi esifanayo, kufanele kube lula ukufakwa, ukulungisa iphutha lesistimu, kanye nokukhipha umoya kanye nokukhipha ukushisa.
Ukwenziwa kwamabhodi esekethe aphrintiwe kanye nezidingo zawo zokwenza, ukujwayelana nezicaciso zokuklama nokuhlangabezana nezidingo zokukhiqiza
Izidingo zenqubo, ukuze ibhodi lesifunda eliphrintiwe eliklanyelwe likwazi ukukhiqizwa ngokushelela.
Uma kucatshangelwa ukuthi izingxenye kulula ukuzifaka, ukulungisa iphutha, nokulungisa ekukhiqizeni, futhi ngesikhathi esifanayo, ihluzo ebhodini lesifunda eliphrintiwe, i-soldering, njll.
Amapuleti, ama-vias, njll. kumele kube yizinga ukuqinisekisa ukuthi izingxenye azingqubuzani futhi zifakwa kalula.
Inhloso yokuklama ibhodi lesifunda eliphrintiwe elokufaka isicelo, ngakho-ke kufanele sicabangele ukusebenza kwalo nokwethembeka,
Ngesikhathi esifanayo, ungqimba kanye nendawo yebhodi lesifunda eliphrintiwe kuyancishiswa ukuze kuncishiswe izindleko.Amaphedi amakhulu ngokufanelekile, ngokusebenzisa izimbobo, kanye nezintambo zisiza ekuthuthukiseni ukwethembeka, ukunciphisa ama-vias, ukwenza izintambo zibe ngcono, futhi kukwenze kuminyene ngokulinganayo., ukuhambisana kuhle, ukuze ukuhlelwa okuphelele kwebhodi kube kuhle kakhulu.
Okokuqala, ukwenza ibhodi lesifunda eliklanyelwe lifinyelele injongo elindelekile, ukuhlelwa okuphelele kwebhodi lesifunda eliphrintiwe kanye nokubekwa kwezingxenye kudlala indima ebalulekile, ethinta ngokuqondile ukufakwa, ukwethembeka, umoya omncane kanye nokuchithwa kokushisa kwalo lonke ibhodi lesifunda eliphrintiwe, kanye ne-wiring the through rate.
Ngemva kokunquma isikhundla nokuma kwezingxenye ku-PCB, cabangela izintambo ze-PCB
Okwesibili, ukuze wenze umkhiqizo oklanyelwe usebenze kangcono nangempumelelo, i-PCB kufanele icabangele ikhono layo lokulwa nokuphazamiseka ekwakhiweni, futhi inobudlelwano obuseduze nesifunda esithile.
Okwesithathu, ngemuva kokuthi izingxenye kanye nomklamo wesifunda webhodi lesifunda usuqediwe, ukwakhiwa kwenqubo yayo kufanele kucatshangelwe ngokulandelayo, inhloso ukuqeda zonke izinhlobo zezinto ezimbi ngaphambi kokuqala kokukhiqizwa, futhi ngesikhathi esifanayo, ukwenziwa kwebhodi lesifunda. kumele kucatshangelwe ukuze kukhiqizwe imikhiqizo esezingeni eliphezulu.kanye nokukhiqizwa ngobuningi.
Lapho sikhuluma ngokumiswa kanye ne-wiring yezingxenye, sesivele sihilele enye yenqubo yebhodi lesifunda.Idizayini yenqubo yebhodi lesifunda iwukuhlanganisa ngokuzenzakalelayo ibhodi lesifunda kanye nezingxenye esiziklame ngomugqa wokukhiqiza we-SMT, ukuze sizuze ukuxhumana okuhle kukagesi.Ukuze sifinyelele ukwakheka isikhundla imikhiqizo yethu design.Idizayini yephedi, izintambo kanye nokunqanda ukuphazamiseka, njll., kufanele futhi sicabangele ukuthi ibhodi esiliklamayo kulula yini ukulikhiqiza, noma lingahlanganiswa nobuchwepheshe besimanje bokuhlangana-SMT, futhi ngesikhathi esifanayo, kufanele lifinyelelwe ukukhiqiza.Vumela izimo zokukhiqiza imikhiqizo enesici zikhiqize ukuphakama kokuklama.Ngokukhethekile, kukhona izici ezilandelayo:
1: Imigqa ehlukene yokukhiqiza ye-SMT inezimo zokukhiqiza ezihlukene, kodwa ngokobukhulu be-PCB, usayizi webhodi elilodwa le-PCB awukho ngaphansi kuka-200*150mm.Uma uhlangothi olude luncane kakhulu, ungasebenzisa ukufakwa, futhi isilinganiso sobude nobubanzi si-3: 2 noma 4: 3 Uma ubukhulu bebhodi lesifunda bukhulu kuno-200 × 150mm, amandla omshini webhodi lesifunda kufanele kucatshangelwe.
2: Uma ubukhulu bebhodi lesifunda buncane kakhulu, kunzima kuyo yonke inqubo yokukhiqiza umugqa we-SMT, futhi akulula ukukhiqiza ngamaqoqo.Amabhodi ahlanganiswe ndawonye ukuze enze ibhodi lonke elifanele ukukhiqizwa ngobuningi, futhi ubukhulu bebhodi lonke kufanele bufanele ubukhulu bebanga lokunamathisela.
I-3: Ukuze uvumelane nokubekwa komugqa wokukhiqiza, ububanzi be-3-5mm kufanele bushiywe ku-veneer ngaphandle kwanoma yiziphi izingxenye, futhi umkhawulo wenqubo we-3-8mm kufanele ushiywe kuphaneli.Kunezinhlobo ezintathu zokuxhuma phakathi konqenqema lwenqubo kanye ne-PCB: A ngaphandle kwamaphethelo agqagqene, Kukhona umsele wokuhlukanisa, u-B unohlangothi kanye nomsele wokuhlukanisa, u-C unecala futhi awunawo umsele wokuhlukanisa.Kukhona inqubo engenalutho.Ngokusho kokuma kwebhodi le-PCB, kunezinhlobo ezahlukene zejigsaw.Ku-PCB Indlela yokumisa yohlangothi lwenqubo ihlukile ngokuya ngamamodeli ahlukene.Ezinye zinezimbobo zokubeka ohlangothini lwenqubo.Ububanzi bembobo buyi-4-5 cm.Uma sikhuluma ngokuqhathanisa, ukunemba kokuma kuphakeme kunaseceleni, ngakho-ke kunezimbobo zokubeka indawo.Lapho imodeli icubungula i-PCB, kufanele ifakwe izimbobo zokubeka, futhi umklamo wembobo kufanele ube ojwayelekile, ukuze ungabangeli ukuphazamiseka ekukhiqizeni.
4: Ukuze kutholwe kangcono futhi kuzuzwe ukunemba okuphezulu kokukhweza, kuyadingeka ukusetha indawo eyireferensi ye-PCB.Ukuthi likhona yini iphuzu lokubhekisela nokuthi lihle noma cha kuzothinta ngokuqondile ukukhiqizwa ngobuningi bomugqa wokukhiqiza we-SMT.Umumo wephoyinti lesithenjwa ungaba isikwele , isiyingi, unxantathu, njll. Futhi ububanzi bungaphakathi kobubanzi obungaba ngu-1-2mm, futhi kufanele bube phakathi kobubanzi obungu-3-5mm endaweni eyinkomba, ngaphandle kwanoma yiziphi izingxenye nemikhondo. .Ngesikhathi esifanayo, iphoyinti lesithenjwa kufanele libe bushelelezi futhi liyisicaba ngaphandle kokungcoliswa.Umklamo wephoyinti lokubhekisela akufanele usondele kakhulu emaphethelweni ebhodi, futhi kufanele kube nebanga lika-3-5mm.
5: Ngokombono wenqubo yokukhiqiza iyonke, ukwakheka kwebhodi kungcono kube nokumise okwe-pitch, ikakhulukazi i-wave soldering.Ukusetshenziswa kwama-rectangles kulula ukudluliswa.Uma kukhona indawo engekho ebhodini le-PCB, indawo elahlekile kufanele igcwaliswe ngendlela yonqenqema lwenqubo.Ngebhodi le-SMT elilodwa livumela izikhala ezingekho.Kodwa izikhala ezilahlekile akulula ukuba zibe zinkulu kakhulu futhi kufanele zibe ngaphansi kuka-1/3 wobude bohlangothi.
Ngamafuphi, ukuvela kwemikhiqizo enesici kungenzeka kuzo zonke izixhumanisi, kodwa ngokuqondene nomklamo webhodi le-PCB, kufanele kucatshangelwe kusuka ezicini ezihlukahlukene, ukuze kungabonakali kuphela inhloso yomklamo wethu womkhiqizo, kodwa. futhi ifanele ulayini wokukhiqiza we-SMT ekukhiqizeni.Ukukhiqiza ngobuningi, zama okusemandleni ethu ukuklama amabhodi e-PCB ekhwalithi ephezulu, futhi unciphise amathuba emikhiqizo enesici.
Isikhathi sokuthumela: Apr-05-2023