Sanin fahimta Babban-yawa Bugawa Hukumar da’ira

Don PCB na musamman tare da mitar lantarki mai girma, gabaɗaya magana, babban mitar ana iya bayyana shi azaman mitar sama da 1GHz. Ayyukansa na zahiri, daidaito da sigogin fasaha suna da girma sosai, kuma ana amfani da su a cikin tsarin hana karo na mota, tsarin tauraron dan adam, tsarin rediyo da sauran fagage. Farashin yana da girma, yawanci kusan yuan 1.8 a kowace santimita murabba’i, kusan yuan 18000 a kowace murabba’in mita.
Halayen HF allon kewayawa
1. Abubuwan da ake buƙata na kula da impedance suna da tsauri, kuma kula da nisa na layi yana da ƙarfi sosai. Haƙuri na gaba ɗaya shine kusan 2%.
2. Saboda farantin na musamman, mannewa na PTH jan ƙarfe ba shi da girma. Yawancin lokaci ya zama dole don roughen vias da saman tare da taimakon kayan aikin jiyya na plasma don ƙara mannewa na PTH jan ƙarfe da siyar da tawada.
3. Kafin juriya waldi, farantin ba zai iya zama ƙasa, in ba haka ba adhesion zai zama matalauta, kuma za a iya kawai roughened da micro etching ruwa.
4. Yawancin faranti an yi su ne da kayan polytetrafluoroethylene. Za a sami manyan gefuna da yawa lokacin da aka kafa su tare da masu yankan niƙa na yau da kullun, don haka ana buƙatar masu yankan niƙa na musamman.
5. Babban allon kewayawa shine allon kewayawa na musamman tare da mitar lantarki mai girma. Gabaɗaya magana, babban mitar za a iya bayyana shi azaman mitar sama da 1GHz.

Ayyukansa na zahiri, daidaito da sigogin fasaha suna da girma sosai, kuma ana amfani da su a cikin tsarin hana karo na mota, tsarin tauraron dan adam, tsarin rediyo da sauran fagage.

Cikakkun bayanai na ma’auni na Board-Frequency
Yawan mitar kayan aikin lantarki shine haɓakar haɓakawa, musamman tare da haɓaka ci gaban cibiyoyin sadarwa mara waya da sadarwar tauraron dan adam, samfuran bayanai suna motsawa zuwa babban sauri da mitar mita, samfuran sadarwa suna motsawa zuwa daidaitaccen murya, bidiyo da bayanai don watsa mara waya. tare da babban iya aiki da sauri sauri. Sabili da haka, sabon ƙarni na samfuran suna buƙatar babban allo mai tsayi. Samfuran sadarwa kamar tsarin tauraron dan adam da tashoshi masu karɓar wayar hannu dole ne su yi amfani da allunan kewayawa mai tsayi. A cikin ƴan shekaru masu zuwa, dole ne a haɓaka cikin sauri, kuma babban allo mai girma zai kasance cikin buƙata mai girma.
(1) Matsakaicin faɗaɗawar thermal na babban mitar da’irar da’ira da foil na jan karfe dole ne su kasance daidai. Idan ba haka ba, za a raba jakar tagulla a cikin yanayin sanyi da canje-canje masu zafi.
(2) High mita kewaye hukumar substrate ya kamata da low ruwa sha, da kuma high ruwa sha zai haifar da dielectric akai-akai da dielectric asarar lokacin da aka shafa da danshi.
(3) Dielectric akai-akai (Dk) na babban mitar da’ira madauri dole ne ƙarami kuma barga. Gabaɗaya magana, ƙarami shine mafi kyau. Adadin watsa siginar ya yi daidai da madaidaicin tushe na tushen dielectric na kayan. Babban dielectric akai-akai yana da sauƙi don haifar da jinkirin watsa sigina.
(4) Asarar dielectric (Df) na babban mitar da’ira substrate abu dole ne ƙarami, wanda yafi rinjayar ingancin watsa sigina. Karamin asarar dielectric shine, ƙaramar asarar siginar ita ce.
(5) Sauran juriya na zafi, juriya na sinadarai, ƙarfin tasiri da ƙarfin kwasfa na babban mitar da’ira da kayan substrate dole ne su kasance masu kyau. Gabaɗaya magana, ana iya bayyana mitar mitoci sama da 1GHz. A halin yanzu, babban mitar da’irar da’ira da aka fi amfani da ita shine na’urar dielectric na fluorine, kamar polytetrafluoroethylene (PTFE), wanda galibi ana kiransa Teflon kuma yawanci ana amfani dashi sama da 5GHz. Bugu da ƙari, ana iya amfani da FR-4 ko PPO substrate don samfurori tsakanin 1GHz da 10GHz.

A halin yanzu, epoxy guduro, ppo ribars da fluro resin sune nau’ikan da’irar da’irar da’irar da ke da mafi tsada shine mafi arha, yayin da Fluoro resin shine mafi tsada; Idan akai la’akari da dielectric akai-akai, dielectric asarar, ruwa sha da mita halaye, fluororesin ne mafi kyau, yayin da epoxy resin ne mafi muni. Lokacin da mitar aikace-aikacen samfur ya wuce 10GHz, kawai allon bugu na fluororesin za a iya amfani da shi. Babu shakka, aikin da ake yi na madaidaicin mitar fluororesin yana da girma fiye da na sauran abubuwan da ake amfani da su, amma rashin amfanin sa shine rashin ƙarfi mara ƙarfi da babban haɓakar haɓakar thermal ban da tsada mai tsada. Don polytetrafluoroethylene (PTFE), ana amfani da adadi mai yawa na inorganic abubuwa (kamar silica SiO2) ko zanen gilashi azaman ƙarfafa kayan filler don haɓaka aikin, don haɓaka ƙaƙƙarfan kayan tushe da rage haɓakar thermal.

Bugu da ƙari, saboda inertia na kwayoyin halitta na resin PTFE kanta, ba shi da sauƙi a haɗa tare da takarda na jan karfe, don haka ana buƙatar kulawa ta musamman don dubawa tare da takarda tagulla. Dangane da hanyoyin magani, ana aiwatar da etching sinadarai ko plasma etching a saman polytetrafluoroethylene don ƙara haɓakar farfajiyar ko ƙara fim ɗin m tsakanin foil tagulla da resin polytetrafluoroethylene don haɓaka mannewa, amma yana iya yin tasiri akan matsakaicin aiki. A ci gaban da dukan fluorine tushen high-mita jirgin substrate bukatar hadin gwiwa da albarkatun kasa masu kaya, bincike raka’a, kayan kaya masu kaya, PCB masana’antun da kuma sadarwa samfurin masana’antun, Domin ci gaba da up tare da m ci gaban. Hukumar kewayawa mai girmas a cikin wannan filin.