Uyilo kunye noHlanganisa lwePCB oluQhelekileyo: Izinto eziphambili
Iibhodi zesekethe eziprintiweyo eziphindaphindwayo(ii-PCB) zizinto ezibalulekileyo kwiintlobo ngeentlobo zezicelo, kubandakanya unxibelelwano, iinkqubo zeradar, unxibelelwano olungenazingcingo, kunye nokucutshungulwa kwedatha okukhawulezayo. Ukusebenza kwezi PCB kuchaphazeleka kakhulu zizinto ezikhethiweyo zoyilo kunye nokuhlanganiswa kwazo. Eli nqaku lihlola izixhobo eziphambili ezisetyenziswa kwi uyilo kunye nokuhlanganiswa kwe-PCB ephindaphindayo, egxininisa iimpawu kunye neenzuzo zazo.
- Izixhobo zesiseko: Izinto ezisisiseko zenza isiseko se-PCB ephindaphindayo kwaye idlala indima ebalulekileyo ekumiseleni iimpawu zayo zombane. Ezinye zezixhobo ezisisiseko eziphambili ezisetyenziswa kwii-PCB eziphindaphindayo ziquka:
- FR-4: I-epoxy resin fiberglass composite engabizi kakhulu nesetyenziswa kakhulu, i-FR-4 inika umatshini olungileyo kunye noomatshiniuzinzo lobushushuNangona kunjalo,i-dielectric constant(Dk) kunyeinto yokusasaza(Df) isenokungabi yeyona ifanelekileyo kwii-applications ezisetyenziswa rhoqo.
- Izixhobo zikaRogers: IRogers yaziwa ngezinto zayo ze-dielectric ezisebenza kakuhle, ezifana ne-RT/Duroid. Ezi zinto zinexabiso elibalaseleyo le-dielectric constant (Dk) kunye ne-dissipation factor (Df), nto leyo eyenza ukuba zilungele ukusetyenziswa kwe-PCB rhoqo.
- Izixhobo zeTaconic: I-Taconic inika iintlobo ngeentlobo zezixhobo ze-dielectric ezisebenza kakuhle, ezifana ne-PEEK (i-Polyether Ether Ketone) kunye ne-polyimide, ezibonelela ngozinzo oluhle kakhulu lobushushu kunye namaxabiso aphantsi e-Df, nto leyo ezenza zilungele iisekethe ezisebenzisa i-frequency ephezulu.
- Izixhobo zokuqhubaUkukhethwa kwezinto eziqhuba umbane kubalulekile kuyilo lwe-PCB olusebenzisa i-frequency ephezulu njengoko zimisela ukuhanjiswa kombane, ukumelana, kunye nokuthembeka kwesignali yesekethe. Ezinye zezinto eziqhuba umbane ezisetyenziswa rhoqo kwii-PCB ezisebenzisa i-frequency ephezulu ziquka:
- I-Copper: I-Copper yeyona nto isetyenziswa kakhulu ekuqhubeni umbane ngenxa yokuba inamandla okuqhuba umbane kakhulu kwayeukusebenza kakuhle kweendlekoNangona kunjalo, ukumelana kwayo kuyanda ngokuphindaphindeka, ngoko ke iileya zobhedu ezincinci zingasetyenziswa kwizicelo ezisebenzisa amaza aphezulu.
- Igolide: Igolide yaziwa ngokusebenza kwayo kakuhle kunye nokumelana okuphantsi, nto leyo eyenza ukuba ifaneleke kakuhle kwii-PCB ezisebenzisa i-frequency ephezulu. Ikwabonelela ngezinto ezilungileyoukumelana nokugqwalakunye nokuqina. Nangona kunjalo, igolide ibiza kakhulu kunekopolo, nto leyo ethintela ukusetyenziswa kwayo kwi- izicelo ezixabisa kakhulu.
- I-Aluminiyam: I-Aluminiyam ayikhethwa rhoqo kwii-PCB ezisebenzisa i-frequency ephezulu kodwa ingasetyenziswa kwiindawo ezithile apho ubunzima kunye nexabiso zezona zinto ziphambili ekufuneka ziqwalaselwe. Ukuqhuba kwayo kuphantsi kune-copper kunye negolide, nto leyo enokubangela ukuba kuqwalaselwe ngakumbi kuyilo.
- Izixhobo zeDielectricIzixhobo ze-dielectric zibalulekile ekugqumeni imikhondo yokuqhuba kwi-PCB kwaye zibalulekile ekumiseleni iimpawu zombane ze-PCB. Ezinye zezixhobo ze-dielectric eziphambili ezisetyenziswa kwi-PCBs ezisebenzisa i-frequency ephezulu ziquka:
- Umoya: Umoya yeyona nto ixhaphakileyo kwi-dielectric kwaye unika ukusebenza kakuhle kombane kumaza aphezulu. Nangona kunjalo, uzinzo lwayo lobushushu lulinganiselwe, kwaye isenokungafaneleki kwiindlela zokusebenzisa ubushushu obuphezulu.
- I-Polyimide: I-Polyimide yi-izixhobo ze-dielectric ezisebenzayo kakhulu Idume ngokuzinza kwayo okumangalisayo kobushushu kunye namaxabiso aphantsi e-Df. Isetyenziswa rhoqo kwii-PCB ezisebenzisa i-frequency ephezulu ezifuna ukumelana namaqondo obushushu aphezulu.
- I-Epoxy: Izixhobo ze-dielectric ezisekwe kwi-epoxy zibonelela ngozinzo oluhle loomatshini kunye nobushushu. Zisetyenziswa kakhulu kwizinto ezisisiseko ze-FR-4 kwaye zibonelela ngokusebenza kakuhle kombane ukuya kuthi ga kwi-frequency ethile.
Ukukhethwa kwezinto zoyilo lwe-PCB olusebenzisa i-frequency ephezulu kunye nokuhlanganiswa kubalulekile ekufezekiseni ukusebenza kakuhle. Izinto ezisisiseko, izinto eziqhubayo, kunye nezinto ze-dielectric zonke zidlala indima ebalulekileyo ekumiseleni iimpawu zombane ze-PCB, ukuthembeka kwesignali, kunye nokuthembeka. Abayili kufuneka bakhethe ngononophelo ezi zinto ngokusekelwe kwiimfuno ezithile zesicelo ukuqinisekisa ukusebenza kakuhle kunye nokusebenza kakuhle. Njengoko iteknoloji iqhubeka ihambela phambili, izinto ezintsha kunye nokuphuculwa kwezinto ezikhoyo ziya kuqhubeka zivela, nto leyo eyandisa ngakumbi amandla e-PCB ezisebenzisa i-frequency ephezulu.
