1.Izigqubuthelo zobhedu
Okubizwa ngokuba yi-copper coating, yindawo engenzi lutho kwibhodi yesiphaluka njenge-datum, kwaye emva koko izaliswe ngobhedu oluqinileyo, ezi ndawo zobhedu zikwabizwa ngokuba kukuzaliswa kobhedu.
Ukubaluleka kokugubungela ubhedu kukuba: ukunciphisa i-impedance yomhlaba, ukuphucula amandla okuthintela ukuphazamiseka; Ukunciphisa ukuhla kwamandla ombane, ukuphucula ukusebenza kakuhle kwamandla; Idityaniswe ngocingo lomhlaba, inokunciphisa indawo yelophu.
Kwakhona ngenjongo yokwenza welding PCB njengoko deformation kangangoko kunokwenzeka, uninzi abavelisi PCB kwakhona kufuna PCB abayili ukuba bagcwalise indawo evulekileyo ye-PCB ngobhedu okanye igridi ucingo komhlaba. Ukuba ubhedu aluphathwa ngokufanelekileyo, luya kuba ngaphezu kokulahlekelwa yilahleko. Ngaba ubhedu “lulunge ngakumbi kunobubi” okanye “lubi ngaphezu kokulungileyo”? Njengoko sonke siyazi, kwimeko ye-frequency ephezulu, i-capacitance esasazwayo ye-wiring kwibhodi yesiphaluka eprintiweyo iya kusebenza. Xa ubude bungaphezulu kwe-1/20 yobude be-waveleng ehambelana ne-frequency yengxolo, umphumo we-eriyali uya kuveliswa, kwaye ingxolo iya kukhutshwa ngaphandle ngocingo. Ukuba kukho i-copper engaphantsi kwe-copper engasebenzi kakuhle, i-copper coating iya kuba sisixhobo sokusasaza ingxolo.
Ngoko ke, kwisiphaluka esiphezulu, ungacingi ukuba umhlaba kwenye indawo, lo "lucingo lomhlaba", kufuneka ube ngaphantsi kwe-λ/20 isithuba, kwi-wiring emngxunyeni, kunye neplani yomhlaba ye-multilayer "isiseko esihle." ”. Ukuba iingubo zobhedu ziphathwa ngokufanelekileyo, ukugubungela ubhedu akugcini nje ukwandisa okwangoku, kodwa kudlala indima emibini yokuphazamiseka kokukhusela. Ngoko ke, kwisiphaluka esiphezulu, ungacingi ukuba umhlaba kwenye indawo, lo "lucingo lomhlaba", kufuneka ube ngaphantsi kwe-λ/20 isithuba, kwi-wiring emngxunyeni, kunye neplani yomhlaba ye-multilayer "isiseko esihle." ”. Ukuba iingubo zobhedu ziphathwa ngokufanelekileyo, ukugubungela ubhedu akugcini nje ukwandisa okwangoku, kodwa kudlala indima emibini yokuphazamiseka kokukhusela.
2.Iindlela ezimbini zokugquma ubhedu
Ngokuqhelekileyo kukho iindlela ezimbini ezisisiseko zokugquma ubhedu, oko kukuthi, indawo enkulu yobhedu kunye nobhedu lwegridi, kudla ngokubuzwa ukuba indawo enkulu yobhedu okanye igridi yobhedu ilungile, ayilunganga ukwenza ngokubanzi.
Ngoba? Indawo enkulu yokugquma ubhedu, kunye nokwandisa indima yangoku kunye nekhuselo, kodwa indawo enkulu yokwaleka kobhedu, ukuba i-soldering wave, ibhodi inokuthambekela phezulu, okanye i-bubble. Ke ngoko, indawo enkulu yobhedu igqunyiwe, kwaye iindawo zokubeka ezininzi ziyavulwa ngokubanzi ukunciphisa amagwebu obhedu.
Igridi elula egutyungelwe ngobhedu ikakhulu ikhusela isiphumo, indima yokunyusa yangoku iyancitshiswa, ukusuka kwindawo yokujonga ukutshatyalaliswa kobushushu, igridi ineenzuzo (inciphisa indawo yokufudumala yobhedu) kwaye idlala indima ethile yokukhusela i-electromagnetic. Ngokukodwa kwisekethe yokuchukumisa, njengoko kuboniswe kumzobo ongezantsi: Kuyimfuneko ukubonisa ukuba igridi iqulunqwe yimigca edibeneyo. Siyazi ukuba kwisekethe, ububanzi bemigca bunayo "ubude bombane" obuhambelanayo ukuya kwi-frequency yokusebenza yebhodi yesekethe (ubukhulu bokwenene bunokwahlulwa ngokuphindaphindiweyo kwedijithali ngokuhambelana nokusebenza rhoqo, jonga iincwadi ezifanelekileyo kwiinkcukacha) .
Xa i-frequency yokusebenza ingekho phezulu kakhulu, mhlawumbi imigca yegridi ayiloncedo kakhulu, kwaye emva kokuba ubude bombane buhambelana ne-frequency yokusebenza, kubi kakhulu, kwaye ufumanisa ukuba isekethe ayisebenzi kakuhle kwaphela, kwaye kukho iimpawu kuyo yonke indawo. eziphazamisana nenkqubo.
Isiphakamiso kukuba ukhethe ngokuhambelana noyilo lwebhodi yesiphaluka, ungabambeli kwinto. Ke ngoko, i-high frequency circuit ngokuchasene neemfuno zokuphazamiseka kwegridi yeenjongo ezininzi, isekethe ephantsi yamatyeli kunye nesekethe enkulu yangoku kunye nezinye ezisetyenziswa ngokuqhelekileyo ubhedu olupheleleyo.