Custom 2- umaleko PTFE PCB
Inkcazo yeMveliso:
| Izinto ezisisiseko: | FR4 TG170 |
| Ukutyeba kwePCB: | 1.8+/-10%mm |
| Ubalo lomaleko: | 8L |
| Ukutyeba kobhedu: | 1/1/1/1/1/1/1/1/1 oz |
| Unyango loMphezulu: | ENIG 2U” |
| Imaski yeSolder: | Buluhlaza obukhazimlayo |
| Isikrini sesilika: | Mhlophe |
| Inkqubo ekhethekileyo | Ukungcwatywa kunye neemfama ngees |
Ii-FAQs
I-PTFE yi-synthetic thermoplastic fluoropolymer kwaye yeyesibini isetyenziswa rhoqo kwi-PCB imathiriyeli yelaminate.Inika iipropati ezihambelanayo ze-dielectric kwi-coefficient yokwandiswa okuphezulu kunomgangatho we-FR4.
I-lubricant ye-PTFE ibonelela ngokuxhathisa umbane ophezulu.Oku kwenza ukuba isetyenziswe ukuba isetyenziswe kwiintambo zombane kunye neebhodi zesekethe.
Kwi-RF kunye neMicrowave frequencies, idielectric constant yestandard FR-4 Material (approx. 4.5) ihlala iphezulu kakhulu, ikhokelela kwilahleko enkulu yesignali ngexesha logqithiso kwiPCB.Ngethamsanqa, izinto ze-PTFE ziqhayisa amaxabiso e-dielectric ahlala ephantsi njenge-3.5 okanye ngaphantsi, ezenza zilungele ukoyisa imida yesantya esiphezulu se-FR-4.
Impendulo elula kukuba ziyafana: iTeflon™ ligama lebrendi ye-PTFE (Polytetrafluoroethylene) kwaye ligama lophawu lokuthengisa elisetyenziswa yinkampani yaseDu Pont kunye neenkampani eziphantsi kwayo (iKinetic eyabhalisa kuqala uphawu kunye neeChemours ezingabanini ngoku. yona).
Izinto ze-PTFE ziqhayisa amaxabiso e-dielectric ahlala ephantsi njenge-3.5 okanye ngaphantsi, ezenza zilungele ukoyisa imida yesantya esiphezulu se-FR-4.
Ngokuqhelekileyo, i-frequency ephezulu inokuchazwa njenge-frequency ngaphezulu kwe-1GHz.Okwangoku, imathiriyeli ye-PTFE isetyenziswa kakhulu kwimveliso ye-PCB yamaxesha amaninzi, ikwabizwa ngokuba yi-Teflon, i-frequency eqhele ukuba ngaphezulu kwe-5GHz.Ngaphandle koko, i-FR4 okanye i-PPO substrate ingasetyenziselwa ukuphindaphinda kwemveliso phakathi kwe-1GHz ~ 10GHz.Ezi substrates zintathu ziphezulu zinomohluko ongezantsi:
Ngokuphathelele kwixabiso lelaminate yeFR4, iPPO kunye neTeflon, iFR4 yeyona inexabiso eliphantsi, ngelixa iTeflon iyeyona ibiza kakhulu.Ngokwe-DK, DF, ukufunxa kwamanzi kunye ne-frequency feature, iTeflon yeyona nto ingcono.Xa usetyenziso lwemveliso lufuna ukuphindaphinda ngaphezulu kwe-10GHz, sinokukhetha kuphela iTeflon PCB substrate ukuyenza.Ukusebenza kweTeflon kubhetele kakhulu kunezinye ii-substrate, Nangona kunjalo, i-substrate yeTeflon inobunzima beendleko eziphezulu kunye nepropati enkulu yokumelana nobushushu.Ukuphucula ukuqina kwe-PTFE kunye nomsebenzi wepropati yokumelana nokushisa, inani elikhulu le-SiO2 okanye i-fiber glass njengezinto zokuzalisa.Ngakolunye uhlangothi, ngenxa ye-molecule ye-inertia yezinto ze-PTFE, okungekho lula ukudibanisa ne-foil yobhedu, ngoko ke, kufuneka kwenziwe unyango olukhethekileyo lomphezulu kwicala lokudibanisa.Ngokumalunga nonyango lomphezulu odityanisiweyo, ngokuqhelekileyo kusetyenziswa ukufakwa kweekhemikhali kumphezulu we-PTFE okanye i-plasma etching ukudibanisa uburhabaxa bomphezulu okanye ukongeza ifilimu enye yokuncamathelisa phakathi kwe-PTFE kunye nefoyile yobhedu, kodwa ezi zinokuchaphazela ukusebenza kwe-dielectric.
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