Mwambo 2-wosanjikiza PTFE PCB

Nthawi zambiri, ma frequency apamwamba amatha kufotokozedwa ngati ma frequency pamwamba pa 1GHz.Pakadali pano, zinthu za PTFE zimagwiritsidwa ntchito kwambiri popanga ma PCB, zimatchedwanso Teflon, zomwe nthawi zambiri zimakhala pamwamba pa 5GHz.Kupatula apo, gawo laling'ono la FR4 kapena PPO litha kugwiritsidwa ntchito pafupipafupi pakati pa 1GHz ~ 10GHz.Magawo atatu okwera kwambiriwa ali ndi kusiyana kocheperako:

Ponena za mtengo wa laminate wa FR4, PPO ndi Teflon, FR4 ndi yotsika mtengo kwambiri, pamene Teflon ndi yokwera mtengo kwambiri.Pankhani ya DK, DF, kuyamwa kwamadzi ndi mawonekedwe pafupipafupi, Teflon ndiye yabwino kwambiri.Pamene ntchito mankhwala amafuna pafupipafupi kuposa 10GHz, tingathe kusankha Teflon PCB gawo lapansi kupanga.Kuchita kwa Teflon ndikwabwino kwambiri kuposa magawo ena, Komabe, gawo laling'ono la Teflon lili ndi vuto la mtengo wokwera komanso katundu wamkulu woletsa kutentha.Kupititsa patsogolo kuuma kwa PTFE komanso ntchito yoletsa kutentha, kuchuluka kwa SiO2 kapena magalasi a fiber ngati zinthu zodzaza.Komano, chifukwa cha molekyulu inertia ya PTFE zakuthupi, zomwe sizili zophweka kuphatikiza ndi zojambulazo zamkuwa, motero, zimafunika kuchita chithandizo chapadera chapamwamba pambali yosakaniza.Pankhani ya mankhwala ophatikizika, nthawi zambiri amagwiritsa ntchito etching ya mankhwala pa PTFE pamwamba kapena plasma etching kuphatikizira kuuma kwa pamwamba kapena kuwonjezera filimu imodzi yomatira pakati pa PTFE ndi zojambulazo zamkuwa, koma izi zitha kukhudza magwiridwe antchito a dielectric.