Custom 2-Layer PTFE PCB
Ƙayyadaddun samfur:
| Tushen Material: | Saukewa: FR4TG170 |
| Kauri PCB: | 1.8 +/- 10% mm |
| Ƙididdigar Layer: | 8L |
| Kaurin Copper: | 1/1/1/1/1/1/1/1 oz |
| Maganin Sama: | ENIG 2U" |
| Mashin Solder: | Koren mai sheki |
| Silkscreen: | Fari |
| Tsari na Musamman | Binne & Makafi vias |
FAQs
PTFE na roba ne na roba na roba kuma shine abu na biyu mafi yawan amfani da laminate PCB. Yana ba da daidaitattun kaddarorin dielectric a mafi girman haɓaka haɓaka fiye da daidaitaccen FR4.
Man shafawa na PTFE yana ba da juriya mai ƙarfi na lantarki. Wannan yana ba shi damar yin amfani da shi don amfani da igiyoyin lantarki da allon kewayawa.
A mitocin RF da Microwave, dielectric akai-akai na daidaitaccen kayan FR-4 (kimanin 4.5) sau da yawa yana da yawa, yana haifar da asarar sigina mai mahimmanci yayin watsawa a fadin PCB. An yi sa'a, kayan PTFE suna alfahari da ƙimar dielectric akai-akai kamar ƙasa da 3.5 ko ƙasa, yana sa su zama manufa don shawo kan iyakokin saurin sauri na FR-4.
Amsar mai sauƙi ita ce, abu ɗaya ne: Teflon ™ alamar kasuwanci ce ta PTFE (Polytetrafluoroethylene) kuma alamar kasuwanci ce da kamfanin Du Pont da kamfanoninsa ke amfani da shi (Kinetic wanda ya fara rajistar alamar kasuwanci & Chemours wanda a halin yanzu ya mallaki. shi).
PTFE kayan alfahari dielectric akai dabi'u kamar yadda low as 3.5 ko kasa, sa su manufa domin shawo kan high-gudun gazawar na FR-4.
Gabaɗaya magana, ana iya bayyana mitar mitoci sama da 1GHz. A halin yanzu, ana amfani da kayan PTFE sosai a masana'antar PCB mai girma, ana kuma kiranta Teflon, wanda yawanci yakan wuce 5GHz. Bayan haka, ana iya amfani da FR4 ko PPO substrate zuwa mitar samfur tsakanin 1GHz ~ 10GHz. Waɗannan manyan mitoci uku suna da bambance-bambance a ƙasa:
Dangane da farashin laminate na FR4, PPO da Teflon, FR4 shine mafi arha, yayin da Teflon shine mafi tsada. Dangane da DK, DF, shayar da ruwa da fasalin mita, Teflon shine mafi kyau. Lokacin da aikace-aikacen samfur ke buƙatar mitar sama da 10GHz, kawai za mu iya zaɓar kayan aikin Teflon PCB don kera. Ayyukan Teflon yana da kyau fiye da sauran kayan aiki, Duk da haka, Teflon substrate yana da lahani na farashi mai yawa da kuma babban kayan da ke tsayayya da zafi. Don inganta taurin PTFE da aikin kaddarorin da ke tsayayya da zafi, babban adadin SiO2 ko gilashin fiber azaman kayan cikawa. A gefe guda, saboda inertia kwayoyin halitta na kayan PTFE, wanda ba shi da sauƙi a haɗa tare da foil na jan karfe, don haka, yana buƙatar yin jiyya na musamman a gefen haɗin gwiwa. Game da hadewar saman jiyya, yawanci amfani da sinadarai etching a kan PTFE surface ko plasma etching to da surface roughness ko ƙara daya m fim tsakanin PTFE da jan karfe foil, amma wadannan na iya tasiri dielectric aiki.
