Indlela yokukhusela ngokuchanekileyo
Kuphuhliso lwemveliso, ukusuka kumbono weendleko, inkqubela phambili, umgangatho kunye nokusebenza, ngokuqhelekileyo kulungele ukuqwalasela ngokucophelela kunye nokuphumeza uyilo oluchanekileyo kumjikelezo wophuhliso lweprojekthi ngokukhawuleza. Izisombululo ezisebenzayo ngokuqhelekileyo azifanelekanga ngokubhekiselele kumacandelo ongezelelweyo kunye nezinye iinkqubo "zokukhawuleza" zokulungisa eziphunyezwe kwixesha elizayo leprojekthi. Umgangatho wayo kunye nokuthembeka kwayo kubi, kwaye iindleko zokuphunyezwa kwangaphambili kwinkqubo ziphezulu. Ukunqongophala kokubonwa kwangaphambili kwinqanaba loyilo lokuqala lweprojekthi kudla ngokukhokelela ekulibazisekeni kokuhanjiswa kwaye kunokubangela ukuba abathengi bangoneliseki ngemveliso. Le ngxaki isebenza kuyo nayiphi na idizayini, nokuba kukulinganisa, amanani, umbane okanye oomatshini.
Xa kuthelekiswa neminye imimandla yokuthintela i-IC eyodwa kunye ne-PCB, iindleko zokuvala i-PCB yonke malunga namaxesha angama-10, kwaye iindleko zokuvala yonke imveliso ngamaxesha angama-100. Ukuba ufuna ukuvimba igumbi lonke okanye isakhiwo, ixabiso ngokwenene liyinani leenkwenkwezi.
Kuphuhliso lwemveliso, ukusuka kumbono weendleko, inkqubela phambili, umgangatho kunye nokusebenza, ngokuqhelekileyo kulungele ukuqwalasela ngokucophelela kunye nokuphumeza uyilo oluchanekileyo kumjikelezo wophuhliso lweprojekthi ngokukhawuleza. Izisombululo ezisebenzayo ngokuqhelekileyo azifanelekanga ngokubhekiselele kumacandelo ongezelelweyo kunye nezinye iinkqubo "zokukhawuleza" zokulungisa eziphunyezwe kwixesha elizayo leprojekthi. Umgangatho wayo kunye nokuthembeka kwayo kubi, kwaye iindleko zokuphunyezwa kwangaphambili kwinkqubo ziphezulu. Ukunqongophala kokubonwa kwangaphambili kwinqanaba loyilo lokuqala lweprojekthi kudla ngokukhokelela ekulibazisekeni kokuhanjiswa kwaye kunokubangela ukuba abathengi bangoneliseki ngemveliso. Le ngxaki isebenza kuyo nayiphi na idizayini, nokuba kukulinganisa, amanani, umbane okanye oomatshini.
Xa kuthelekiswa neminye imimandla yokuthintela i-IC eyodwa kunye ne-PCB, iindleko zokuvala i-PCB yonke malunga namaxesha angama-10, kwaye iindleko zokuvala yonke imveliso ngamaxesha angama-100. Ukuba ufuna ukuvimba igumbi lonke okanye isakhiwo, ixabiso ngokwenene liyinani leenkwenkwezi.
Ithagethi ye-EMI ekhuselweyo kukudala ikheji yeFaraday ejikeleze amacandelo engxolo yeRF evaliweyo yebhokisi yentsimbi. Amacala amahlanu aphezulu enziwe ngekhuselo lokukhusela okanye itanki yesinyithi, kwaye icala lezantsi liphunyezwa ngeengqimba zomhlaba kwi-PCB. Kwiqokobhe elifanelekileyo, akukho kukhutshwa kuya kungena okanye kushiye ibhokisi. Oku kukhuselwa okuyingozi okukhuselweyo kuya kwenzeka, njengokukhululwa kwimingxuma kwiitoti zetoti, kwaye ezi toti zivumela ukuhanjiswa kobushushu ngexesha lokubuya kwe-solder. Oku kuvuza kusenokubangelwa ziziphene zomqamelo we-EMI okanye izincedisi ezidityanisiweyo. Ingxolo inokukhululeka kwisithuba esiphakathi komgangatho ophantsi ukuya kumaleko omhlaba.
Ngokwemveli, ukhuselo lwePCB luqhagamshelwe kwiPCB ngomsila wepore welding. Umsila we-welding udityaniswe ngesandla ngesandla emva kwenkqubo yokuhlobisa ephambili. Le yinkqubo ethatha ixesha kwaye iyabiza. Ukuba ukugcinwa kuyadingeka ngexesha lofakelo kunye nokugcinwa, kufuneka kufakwe i-welded ukungena kwisekethe kunye namacandelo phantsi kwe-shielding layer. Kwindawo yePCB equlathe icandelo elixineneyo, kukho ingozi ebiza kakhulu yomonakalo.
Uphawu lophawu oluqhelekileyo lwetanki yokhuselo lwenqanaba lolwelo lwePCB lulolu hlobo lulandelayo:
Unyawo oluncinci;
Ubume beqhosha eliphantsi;
Uyilo lweziqwenga ezimbini (ucingo kunye nesivalo);
Ukudlula okanye ukuncamathisela komhlaba;
Ipatheni ye-Multi-cavity (yahlulahlula amacandelo amaninzi kunye nomgangatho ofanayo wokukhusela);
Phantse unlimited design bhetyebhetye;
iVenti;
Isiciko esikwaziyo ukulungiselela amacandelo olondolozo olukhawulezayo;
Mna / O umngxuma
Ukusika isinxibelelanisi;
I-absorber ye-RF iphucula ukukhusela;
ukhuseleko lwe-ESD ngeepads zokugquma;
Sebenzisa umsebenzi wokutshixa oqinileyo phakathi kwesakhelo kunye nesivalo ukukhusela ngokuthembekileyo impembelelo kunye nokungcangcazela.
Imathiriyeli yokhuselo eqhelekileyo
Izinto ezahlukeneyo zokukhusela zingasetyenziswa ngokuqhelekileyo, kubandakanywa ubhedu, isilivere ye-nickel kunye nensimbi engenasici. Olona hlobo luxhaphakileyo lu:
Unyawo oluncinci;
Ubume beqhosha eliphantsi;
Uyilo lweziqwenga ezimbini (ucingo kunye nesivalo);
Ukudlula okanye ukuncamathisela komhlaba;
Ipatheni ye-Multi-cavity (yahlulahlula amacandelo amaninzi kunye nomgangatho ofanayo wokukhusela);
Phantse unlimited design bhetyebhetye;
iVenti;
Isiciko esikwaziyo ukulungiselela amacandelo olondolozo olukhawulezayo;
Mna / O umngxuma
Ukusika isinxibelelanisi;
I-absorber ye-RF iphucula ukukhusela;
ukhuseleko lwe-ESD ngeepads zokugquma;
Sebenzisa umsebenzi wokutshixa oqinileyo phakathi kwesakhelo kunye nesivalo ukukhusela ngokuthembekileyo impembelelo kunye nokungcangcazela.
Ngokubanzi, i-tin-plated steel lolona khetho lungcono lokubhloka ngaphantsi kwe-100 MHz, ngelixa i-tin-plated copper lolona khetho lungcono ngaphezu kwe-200 MHz. I-tin plating inokufezekisa ukusebenza kakuhle kwe-welding. Ngenxa yokuba i-aluminiyam ngokwayo ingenazo iimpawu zokutshatyalaliswa kobushushu, akukho lula ukuyidibanisa kumaleko omhlaba, ngoko ke ayisoloko isetyenziselwa ukukhusela inqanaba le-PCB.
Ngokwemimiselo yemveliso yokugqibela, zonke izinto ezisetyenziselwa ukukhusela zingadinga ukuhlangabezana nomgangatho we-ROHS. Ukongeza, ukuba imveliso isetyenziswe kwindawo eshushu kunye nefumileyo, inokubangela ukubola kombane kunye ne-oxidation.
Ixesha lokuposa: Apr-17-2023
