Uyilo lwePCB oluPhezulu kunye neNdibano: Izinto ezingundoqo
Iibhodi zeesekethe eziprintiweyo eziphezulu(iiPCBs) zizinto ezibalulekileyo kuluhlu lwezicelo, kubandakanywa unxibelelwano, iinkqubo ze-radar, unxibelelwano olungenacingo, kunye nokulungiswa kwedatha ngesantya esiphezulu. Ukusebenza kwezi PCB kuphenjelelwa kakhulu zizinto ezikhethiweyo kuyilo kunye nokuhlanganisana kwazo. Eli nqaku liphonononga izinto eziphambili ezisetyenziswa kwi uyilo lwe-PCB oluqhelekileyo kunye nendibano, egxininisa iimpawu zabo kunye neenzuzo zabo.
- Izinto ezisisiseko: Izinto ezisisiseko zenza isiseko se-PCB ephezulu-frequency kwaye idlala indima ebalulekileyo ekumiseni iimpawu zayo zombane. Ezinye zezona zixhobo ziphambili zisetyenziswa kwiiPCBs ezikwi-frequency ephezulu ziquka:
- FR-4: I-epoxy resin fiberglass composite eyoqoqosho kwaye isetyenziswa ngokubanzi, iFR-4 ibonelela ngoomatshini abalungileyo kwayeukuzinza kwe-thermal.Nangona kunjalo, yayoI-dielectric rhoqo(Dk) kunyei-disipation factor(Df) isenokungabi yeyona ilungileyo kwizicelo ze-high-frequency.
- Rogers Materials: I-Rogers idume ngezinto zayo eziphezulu ze-dielectric, ezifana ne-RT / Duroid. Ezi zixhobo zibonisa idielectric constant ebalaseleyo (Dk) kunye ne-dissipation factor (Df) amaxabiso, ezenza zifaneleke kakuhle kwizicelo ze-PCB ze-high-frequency.
- Izinto zeTaconic: I-Taconic inikezela ngeentlobo zezixhobo ze-dielectric eziphezulu, ezifana ne-PEEK (i-Polyether Ether Ketone) kunye ne-polyimide, enikezela ukuzinza kwe-thermal egqwesileyo kunye nexabiso eliphantsi le-Df, ezenza ukuba zilungele kakuhle kwiisekethe eziphezulu ze-frequency.
- Izinto zokuqhuba: Ukukhethwa kwezinto zokuqhuba kubalulekile kuyilo lwe-PCB olukwi-frequency ephezulu njengoko bemisela ukuhanjiswa kwesekethe, ukuxhathisa, kunye nokuthembeka komqondiso. Ezinye izinto ezisetyenziswa rhoqo kwii-PCBs ezikwi-frequency ephezulu ziquka:
- Ubhedu: Ubhedu yeyona nto isetyenziswa kakhulu kwisixhobo sokuqhuba ngenxa yokuhanjiswa kwayo okungaqhelekanga kunyeukusebenza kakuhle kweendleko. Nangona kunjalo, ukuchasana kwayo kuyanda ngokuphindaphindiweyo, ngoko ke iileya zobhedu ezincinci zinokusetyenziswa kwizicelo eziphezulu.
- Igolide: Igolide yamkelwa ngenxa yokuqhuba kwayo okugqwesileyo kunye nokuxhathisa okuphantsi, iyenza ifanelekele ii-PCBs ezikwi-frequency ephezulu. Ikwabonelela okulungileyoukumelana nomhlwakunye nokuqina. Noko ke, igolide ibiza kakhulu kunobhedu, nto leyo enciphisa ukusetyenziswa kwayo izicelo ezingabizi kakhulu.
- I-Aluminiyam: I-Aluminiyam lukhetho olungaxhaphakanga kakhulu kwii-PCBs ze-high-frequency kodwa inokuqeshwa kwizicelo ezithile apho ubunzima kunye neendleko ziyinkxalabo ephambili. I-conductivity yayo iphantsi kunobhedu kunye negolide, enokuthi ifune ukuqwalaselwa okongeziweyo kuyilo.
- Izinto zeDielectric: Imathiriyeli ye-Dielectric ibalulekile ekugqumeni iitrayi ze-conductive kwi-PCB kwaye zibalulekile ekumiseleni iimpawu zombane ze-PCB. Ezinye zezinto eziphezulu zedielectric ezisetyenziswa kwii-PCBs ezikwi-high-frequency ziquka:
- Umoya: Umoya yeyona mathiriyeli ixhaphakileyo yedielectric kwaye inikezela ukusebenza kakuhle kombane kumaza aphezulu. Nangona kunjalo, ukuzinza kwayo kwe-thermal kunqunyelwe, kwaye akunakufaneleka kwizicelo eziphezulu zokushisa.
- I-Polyimide: I-Polyimide yi-aumgangatho ophezulu we-dielectric materialidume ngozinzo olukhethekileyo lwe-thermal kunye namaxabiso aphantsi eDf. Isetyenziswa rhoqo kwi-PCBs ezifuna ukumelana namaqondo obushushu aphezulu.
- I-Epoxy: Izixhobo ze-dielectric ezisekelwe kwi-epoxy zibonelela kakuhle ngomatshini kunye nokuzinza kwe-thermal. Ngokuqhelekileyo baqeshwe kwizinto ezisisiseko ze-FR-4 kwaye zibonelela ngokusebenza kakuhle kombane ukuya kuthi ga kwifrikhwensi ethile.
Ukukhethwa kwemathiriyeli yoyilo lwe-PCB ye-frequency ephezulu kunye nendibano ibalulekile ekufezekiseni ukusebenza kakuhle. Izinto ezisisiseko, izinto zokuqhuba, kunye nezixhobo ze-dielectric zonke zidlala indima ebalulekileyo ekumiseleni iimpawu zombane zePCB, ukuthembeka komqondiso, kunye nokuthembeka. Abaqulunqi kufuneka bakhethe ngokucokisekileyo ezi zixhobo ngokusekelwe kwiimfuno ezithile zesicelo ukuqinisekisa ukusebenza kakuhle kunye nokusebenza. Njengoko itekhnoloji iqhubela phambili, izixhobo ezitsha kunye nezixhasi kwizinto ezikhoyo ziya kuqhubeka nokuvela, ngakumbi ukwandisa amandla e-PCBs ezixhaphakileyo.