Kev cai 2-txheej PTFE PCB
Khoom Specification:
| Khoom siv hauv paus: | FR4 TG 170 |
| PCB Thickness: | 1.8 +/- 10% mm |
| Txheej suav: | 8L |
| Copper Thickness: | 1/1/1/1/1/1/1/1/1 oz |
| Kev kho deg: | ENIG 2U" |
| Solder Mask: | Glossy ntsuab |
| Silkscreen: | Dawb |
| Txheej txheem tshwj xeeb | faus & dig muag vias |
FAQs
PTFE yog ib qho hluavtaws thermoplastic fluoropolymer thiab yog qhov thib ob feem ntau siv PCB laminate khoom.Nws muaj cov khoom zoo sib xws ntawm dielectric ntawm kev nthuav dav ntau dua li tus qauv FR4.
PTFE lubricant muab hluav taws xob ua haujlwm siab.Qhov no ua rau nws ua haujlwm rau kev siv hluav taws xob cables thiab Circuit Court boards.
Ntawm RF thiab Microwave zaus, qhov dielectric qhov tsis tu ncua ntawm tus qauv FR-4 Khoom (kwv yees 4.5) feem ntau siab dhau, uas ua rau lub teeb liab tseem ceeb thaum sib kis thoob plaws PCB.Hmoov zoo, PTFE cov ntaub ntawv khav theeb dielectric qhov tseem ceeb tsawg li 3.5 lossis qis dua, ua rau lawv zoo tagnrho rau kev kov yeej cov kev txwv siab ntawm FR-4.
Cov lus teb yooj yim yog tias lawv yog tib yam: Teflon ™ yog lub npe khoom lag luam rau PTFE (Polytetrafluoroethylene) thiab yog lub npe lag luam uas siv los ntawm Du Pont lub tuam txhab thiab nws cov tuam txhab lag luam (Kinetic uas thawj zaug sau npe lag luam & Chemours uas tam sim no muaj. nws).
PTFE cov ntaub ntawv khav theeb dielectric qhov tseem ceeb tsawg li 3.5 lossis qis dua, ua rau lawv zoo tagnrho rau kev kov yeej cov kev txwv siab ntawm FR-4.
Feem ntau hais lus, siab zaus tuaj yeem txhais tau tias yog zaus tshaj 1GHz.Tam sim no, PTFE cov khoom siv dav siv hauv kev tsim PCB ntau zaus, nws tseem hu ua Teflon, uas feem ntau yog siab dua 5GHz.Dhau li ntawd, FR4 lossis PPO substrate tuaj yeem siv rau cov khoom siv zaus ntawm 1GHz ~ 10GHz.Peb lub siab zaus substrates no muaj qhov sib txawv hauv qab no:
Hais txog tus nqi laminate ntawm FR4, PPO thiab Teflon, FR4 yog qhov pheej yig tshaj, thaum Teflon yog qhov kim tshaj plaws.Nyob rau hauv cov nqe lus ntawm DK, DF, dej nqus thiab zaus feature, Teflon yog qhov zoo tshaj plaws.Thaum cov ntawv thov khoom xav tau ntau dua 10GHz, peb tuaj yeem xaiv Teflon PCB substrate los tsim.Kev ua tau zoo ntawm Teflon yog qhov zoo dua li lwm cov substrates, Txawm li cas los xij, Teflon substrate muaj qhov tsis zoo ntawm cov nqi siab thiab cov khoom siv hluav taws xob loj.Txhawm rau txhim kho PTFE txhav thiab cov khoom siv hluav taws xob ua kom sov, ntau tus SiO2 lossis fiber ntau iav ua cov khoom ntim.Ntawm qhov tod tes, vim molecule inertia ntawm PTFE cov khoom, uas nws tsis yooj yim rau kev sib txuas nrog cov ntawv ci tooj liab, yog li, nws yuav tsum tau ua qhov tshwj xeeb nto kho ntawm kev sib txuas sab.Hais txog kev kho deg, feem ntau siv tshuaj etching ntawm PTFE nto los yog plasma etching ntxiv rau saum npoo av los yog ntxiv ib zaj duab xis nplaum ntawm PTFE thiab tooj liab ntawv ci, tab sis cov no yuav cuam tshuam rau kev ua haujlwm ntawm dielectric.
