1.Izigqoko zethusi
Okubizwa ngokuthi i-copper coating, indawo engenzi lutho ebhodini lesifunda njenge-datum, bese igcwaliswa ngethusi eliqinile, lezi zindawo zethusi zaziwa nangokuthi ukugcwaliswa kwethusi.
Ukubaluleka kokugqoka kwethusi yilokhu: ukunciphisa i-impedance yomhlabathi, ukuthuthukisa ikhono lokulwa nokuphazamiseka;Yehlisa ukwehla kwamandla kagesi, uthuthukise ukusebenza kahle kwamandla;Ixhunywe nentambo yaphansi, ingase futhi inciphise indawo yeluphu.
Futhi ngenjongo yokwenza i-PCB yokushisela ibe yi-deformation ngangokunokwenzeka, abakhiqizi abaningi be-PCB bazophinde badinge abaklami be-PCB ukuthi bagcwalise indawo evulekile ye-PCB ngethusi noma ngocingo oluphansi lwegridi.Uma ithusi lingaphathwa kahle, liyoba ngaphezu kokulahlekelwa ukulahlekelwa.Kungakhathaliseki ukuthi ithusi “lihle kakhulu kunokubi” noma “libi kakhulu kunokuhle”?Njengoba sonke sazi, esimweni sokuvama okuphezulu, i-capacitance esabalalisiwe ye-wiring ebhodini lesifunda ephrintiwe izosebenza.Uma ubude bungaphezu kuka-1/20 we-wavelength ehambisana nemvamisa yomsindo, umphumela we-antenna uzokhiqizwa, futhi umsindo uzokhishelwa ngaphandle ngezintambo.Uma kukhona ukunamathela kwethusi okusekelwe kahle ku-PCB, ukunamathela kwethusi kuzoba ithuluzi lokusabalalisa umsindo.
Ngakho-ke, kumjikelezo wemvamisa ephezulu, ungacabangi ukuthi umhlabathi endaweni ethile, lena "intambo yomhlabathi", kufanele ibe ngaphansi kwezikhala ezingaphansi kuka-λ/20, ku-wiring embobeni, kanye nendiza ephansi ye-multilayer "isisekelo esihle." ”.Uma i-copper yethusi iphathwa kahle, ukugqoka kwethusi akugcini nje ukwandisa okwamanje, kodwa futhi kudlala indima emibili yokuphazanyiswa kokuvikela.Ngakho-ke, kumjikelezo wemvamisa ephezulu, ungacabangi ukuthi umhlabathi endaweni ethile, lena "intambo yomhlabathi", kufanele ibe ngaphansi kwezikhala ezingaphansi kuka-λ/20, ku-wiring embobeni, kanye nendiza ephansi ye-multilayer "isisekelo esihle." ”.Uma i-copper yethusi iphathwa kahle, ukugqoka kwethusi akugcini nje ukwandisa okwamanje, kodwa futhi kudlala indima emibili yokuphazanyiswa kokuvikela.
2.Izinhlobo ezimbili ze-copper coating
Ngokuvamile kunezindlela ezimbili eziyisisekelo zokumboza ithusi, okungukuthi, indawo enkulu yethusi kanye ne-grid yethusi, kuvame ukubuzwa ukuthi indawo enkulu yethusi noma i-grid yethusi yinhle, ayilungile ukuhlanganisa.
Kungani?Indawo enkulu ye-copper coating, ngokukhulisa indima yamanje kanye nokuvikela okubili, kodwa indawo enkulu ye-copper coating, uma i-wave soldering, ibhodi lingase litsheke, noma ligweme.Ngakho-ke, indawo enkulu yethusi imboziwe, futhi izikhala eziningana ngokuvamile ziyavulwa ukuze kuncishiswe ucwecwe lwethusi.
Igridi elula embozwe ngethusi ngokuyinhloko ivikela umphumela, indima yokwandisa okwamanje iyancipha, kusukela ekubukeni kokukhipha ukushisa, igridi inezinzuzo (inciphisa indawo yokushisa yethusi) futhi idlala indima ethile yokuvikela i-electromagnetic.Ikakhulukazi kumjikelezo wokuthinta, njengoba kuboniswe emfanekisweni ongezansi: Kuyadingeka ukuveza ukuthi igridi yakhiwe imigqa enyakazayo.Siyazi ukuthi kumjikelezo, ububanzi bemigqa buhambisana "nobude bukagesi" obuhambisanayo nemvamisa yokusebenza yebhodi lesifunda (ubukhulu bangempela bungahlukaniswa imvamisa yedijithali ehambisana nemvamisa yokusebenza, bheka izincwadi ezifanele ukuze uthole imininingwane) .
Uma i-frequency yokusebenza ingekho phezulu kakhulu, mhlawumbe imigqa yegridi ayiwusizo kakhulu, futhi uma ubude bogesi buhambisana nobuningi bokusebenza, kubi kakhulu, futhi uthola ukuthi isifunda asisebenzi kahle nhlobo, futhi kukhona amasignali yonke indawo. eziphazamisa uhlelo.
Isiphakamiso ukukhetha ngokuvumelana nomklamo webhodi lesifunda, hhayi ukubambelela entweni.Ngakho-ke, i-high frequency circuit ngokumelene nezidingo zokuphazanyiswa kwegridi yezinhloso eziningi, isifunda se-frequency ephansi enesekhethi yamanje enkulu kanye nokunye okuvame ukusetshenziswa okugcwele ithusi eliphelele.