Indlela yokuvikela kahle
Ekuthuthukisweni komkhiqizo, ngokombono wezindleko, inqubekelaphambili, ikhwalithi kanye nokusebenza, ngokuvamile kungcono kakhulu ukucabangela ngokucophelela nokusebenzisa umklamo ofanele emjikelezweni wokuthuthukisa iphrojekthi ngokushesha ngangokunokwenzeka. Izixazululo ezisebenzayo ngokuvamile azilungile ngokwezingxenye ezengeziwe kanye nezinye izinhlelo zokulungisa "ezisheshayo" ezisetshenziswe esikhathini sakamuva sephrojekthi. Izinga nokuthembeka kwayo kuphansi, futhi izindleko zokuqaliswa ekuqaleni kwenqubo ziphezulu. Ukuntuleka kokubona kusengaphambili esigabeni sokuqala somklamo ngokuvamile kuholela ekubambezelekeni kokulethwa futhi kungase kubangele ukuthi amakhasimende anganeliseki ngomkhiqizo. Le nkinga isebenza kunoma yimuphi umklamo, kungakhathaliseki ukuthi ukulinganisa, izinombolo, ugesi noma umshini.
Uma kuqhathaniswa nezinye izifunda zokuvimbela i-IC eyodwa ne-PCB, izindleko zokuvimba yonke i-PCB cishe izikhathi eziyi-10, futhi izindleko zokuvimba wonke umkhiqizo ziyizikhathi eziyi-100. Uma udinga ukuvimba ikamelo lonke noma isakhiwo, izindleko ngempela isibalo sezinkanyezi.
Ekuthuthukisweni komkhiqizo, ngokombono wezindleko, inqubekelaphambili, ikhwalithi kanye nokusebenza, ngokuvamile kungcono kakhulu ukucabangela ngokucophelela nokusebenzisa umklamo ofanele emjikelezweni wokuthuthukisa iphrojekthi ngokushesha ngangokunokwenzeka. Izixazululo ezisebenzayo ngokuvamile azilungile ngokwezingxenye ezengeziwe kanye nezinye izinhlelo zokulungisa "ezisheshayo" ezisetshenziswe esikhathini sakamuva sephrojekthi. Izinga nokuthembeka kwayo kuphansi, futhi izindleko zokuqaliswa ekuqaleni kwenqubo ziphezulu. Ukuntuleka kokubona kusengaphambili esigabeni sokuqala somklamo ngokuvamile kuholela ekubambezelekeni kokulethwa futhi kungase kubangele ukuthi amakhasimende anganeliseki ngomkhiqizo. Le nkinga isebenza kunoma yimuphi umklamo, kungakhathaliseki ukuthi ukulinganisa, izinombolo, ugesi noma umshini.
Uma kuqhathaniswa nezinye izifunda zokuvimbela i-IC eyodwa ne-PCB, izindleko zokuvimba yonke i-PCB cishe izikhathi eziyi-10, futhi izindleko zokuvimba wonke umkhiqizo ziyizikhathi eziyi-100. Uma udinga ukuvimba ikamelo lonke noma isakhiwo, izindleko ngempela isibalo sezinkanyezi.
Ithagethi ye-EMI evikelekile iwukwenza ikheji ye-Faraday ezungeze izingxenye zomsindo we-RF ezivaliwe zebhokisi lensimbi. Izinhlangothi ezinhlanu zaphezulu zenziwe ngekhava yokuvikela noma ithangi lensimbi, futhi uhlangothi lwaphansi lusetshenziswa ngezendlalelo zomhlabathi ku-PCB. Kugobolondo elifanele, akukho ukukhishwa okuzongena noma kushiye ibhokisi. Lokhu kukhishwa okuyingozi okuvikelwe kuzokwenzeka, njengokuphuma ekubhobozeni kuya ezimbotsheni zamathini, futhi lawa mathini avumela ukudluliswa kokushisa ngesikhathi sokubuya kwe-solder. Lokhu kuvuza kungase futhi kubangelwe ukukhubazeka komcamelo we-EMI noma izisekeli ezishiselwe. Umsindo ungase futhi ukhululeke esikhaleni esiphakathi kokuphansi kwesitezi esingaphansi kuya kungqimba lomhlabathi.
Ngokwesiko, isivikelo se-PCB sixhunywe ku-PCB ngomsila we-pore welding. Umsila we-welding ufakwa ngesandla ngesandla ngemuva kwenqubo yokuhlobisa eyinhloko. Lena inqubo edla isikhathi futhi ebizayo. Uma ukugcinwa kuyadingeka ngesikhathi sokufakwa nokugcinwa, kufanele kuhlanganiswe ukuze kufakwe isifunda kanye nezingxenye ngaphansi kwesendlalelo sokuvikela. Endaweni ye-PCB equkethe ingxenye ezwela kakhulu, kunengozi ebiza kakhulu yomonakalo.
Isibaluli esijwayelekile sethangi le-PCB lokuvikela izinga loketshezi imi kanje:
Izinyathelo ezincane;
Ukucushwa kokhiye ophansi;
Idizayini yezingxenye ezimbili (uthango nesivalo);
Dlula noma unamathisele ngaphezulu;
Iphethini ye-Multi-cavity (hlukanisa izingxenye eziningi ngesendlalelo esifanayo sokuzivikela);
Ukuvumelana nezimo komklamo cishe okungenamkhawulo;
Izimbobo;
Isivalo esikwaziyo sezingxenye zokulungisa ngokushesha;
Mina / O hole
Ukusika isixhumi;
I-RF absorber ithuthukisa ukuzivikela;
Ukuvikelwa kwe-ESD ngamaphedi wokufaka;
Sebenzisa umsebenzi wokukhiya okuqinile phakathi kohlaka nesivalo ukuze uvimbele umthelela nokudlidliza.
Izinto zokuvikela ezijwayelekile
Izinhlobonhlobo zezinto zokuvikela zivame ukusetshenziswa, kufaka phakathi ithusi, isiliva ye-nickel nensimbi engagqwali. Uhlobo oluvame kakhulu yileli:
Izinyathelo ezincane;
Ukucushwa kokhiye ophansi;
Idizayini yezingxenye ezimbili (uthango nesivalo);
Dlula noma unamathisele ngaphezulu;
Iphethini ye-Multi-cavity (hlukanisa izingxenye eziningi ngesendlalelo esifanayo sokuzivikela);
Ukuvumelana nezimo komklamo cishe okungenamkhawulo;
Izimbobo;
Isivalo esikwaziyo sezingxenye zokulungisa ngokushesha;
Mina / O hole
Ukusika isixhumi;
I-RF absorber ithuthukisa ukuzivikela;
Ukuvikelwa kwe-ESD ngamaphedi wokufaka;
Sebenzisa umsebenzi wokukhiya okuqinile phakathi kohlaka nesivalo ukuze uvimbele umthelela nokudlidliza.
Ngokuvamile, insimbi ye-tin-plated iyisinqumo esingcono kakhulu sokuvimba ngaphansi kuka-100 MHz, kuyilapho ithusi elicwengekileyo liyisinqumo esingcono kakhulu ngaphezu kuka-200 MHz. I-tin plating ingafinyelela ukusebenza kahle kwe-welding. Ngenxa yokuthi i-aluminium ngokwayo ayinazo izici zokukhipha ukushisa, akulula ukushisela ungqimba lomhlabathi, ngakho-ke ngokuvamile ayisetshenziselwa ukuvikela izinga le-PCB.
Ngokwemithethonqubo yomkhiqizo wokugcina, zonke izinto ezisetshenziselwa ukuvikela zingase zidinge ukuhlangabezana nezinga le-ROHS. Ukwengeza, uma umkhiqizo usetshenziswa endaweni eshisayo nenomswakama, ungabangela ukugqwala kukagesi kanye ne-oxidation.
Isikhathi sokuthumela: Apr-17-2023
