SiC silicon carbideChipangizochi chimatanthauza chipangizo chopangidwa ndi silicon carbide ngati zopangira.
Malinga ndi makhalidwe osiyanasiyana otsutsa, imagawidwa m'magulu awiri: zida zamagetsi za silicon carbide ndikabati ya silicon yokhala ndi insulation yochepaZipangizo za RF.
Mafomu akuluakulu a chipangizo ndi ntchito za silicon carbide
Ubwino waukulu wa SiC ndiZinthu zogwiritsidwa ntchitondi:
SiC ili ndi mpata wa band kuwirikiza katatu kuposa Si, zomwe zimachepetsa kutuluka kwa madzi ndikuwonjezera kulekerera kutentha.
SiC ili ndi mphamvu yowononga mphamvu ya Si kuwirikiza ka 10 kuposa Si, imatha kusintha kuchuluka kwa magetsi, kuchuluka kwa magetsi, kupirira mphamvu ya magetsi ndikuchepetsa kutayika kwa magetsi, ndipo ndiyoyenera kugwiritsa ntchito magetsi ambiri.
SiC ili ndi liwiro la kusuntha kwa ma electron saturation kawiri kuposa Si, kotero imatha kugwira ntchito pafupipafupi kwambiri.
SiC ili ndi mphamvu yoyendetsera kutentha kuwirikiza katatu kuposa Si, imagwira ntchito bwino pochotsa kutentha, imatha kuthandizira mphamvu zambiri ndikuchepetsa kufunikira kwa kuchotsera kutentha, zomwe zimapangitsa chipangizocho kukhala chopepuka.
Choyambira choyendetsa
Chotsukira mpweya: Mwa kuchotsa zonyansa zosiyanasiyana mu kristalo, makamaka zonyansa zosaya kwambiri, kuti mupeze mphamvu yayikulu yotsutsa kristalo.
Kuyendetsasilicon carbide substrateSiC wafer
Chipangizo champhamvu cha silicon carbide choyendetsedwa ndi conductive chimapangidwa kudzera mu kukula kwa silicon carbide epitaxial wosanjikiza pa conductive substrate, ndipo pepala la silicon carbide epitaxial limakonzedwanso, kuphatikizapo kupanga ma Schottky diodes, MOSFET, IGBT, ndi zina zotero, zomwe zimagwiritsidwa ntchito makamaka m'magalimoto amagetsi, kupanga mphamvu ya photovoltaic, transit ya sitima, malo osungira deta, kuchaja ndi zina. Ubwino wa magwiridwe antchito ndi awa:
Mphamvu yamagetsi yowonjezereka ya silicon carbide ndi yoposa nthawi 10 kuposa silicon, zomwe zimapangitsa kuti kukana kwamphamvu kwa zida za silicon carbide kukhala kwakukulu kwambiri kuposa zida zofanana za silicon.
Makhalidwe abwino a kutentha kwambiri. Silicon carbide ili ndi mphamvu yotenthetsera kutentha kwambiri kuposa silicon, zomwe zimapangitsa kuti kutentha kwa chipangizocho kukhale kosavuta komanso kutentha kogwiritsidwa ntchito kumakhala kokwera. Kukana kutentha kwambiri kungayambitse kuwonjezeka kwakukulu kwa mphamvu, pomwe kumachepetsa zofunikira pamakina oziziritsira, kuti malo opumulirako akhale opepuka komanso ocheperako.
Kugwiritsa ntchito mphamvu zochepa. ① Chipangizo cha silicon carbide chili ndi mphamvu zochepa zotetezera komanso kutayika kochepa; (2) Mphamvu yotuluka ya zida za silicon carbide imachepa kwambiri kuposa ya zida za silicon, motero imachepetsa kutayika kwa mphamvu; ③ Palibe vuto la kutayika kwa mphamvu pamakina a silicon carbide, ndipo kutayika kwa kusinthaku kumakhala kochepa, zomwe zimapangitsa kuti kusinthaku kukhale kosavuta.
SiC substrate yokhala ndi insulation yochepa
Gawo lopanda mpweya wa SiC: Kupaka mankhwala a N kumagwiritsidwa ntchito powongolera molondola kukana kwa zinthu zoyendetsera mpweya mwa kuwerengera ubale wofanana pakati pa kuchuluka kwa nayitrogeni, kuchuluka kwa kukula ndi kukana kwa kristalo.
Chitsulo cholimba kwambiri cha semi-insulating substrate
Zipangizo za RF zopangidwa ndi silicon carbon zomwe zimakhala ndi semi-insulated zimapangidwanso mwa kukulitsa gallium nitride epitaxial layer pa semi-insulated silicon carbide substrate kuti akonze pepala la silicon nitride epitaxial, kuphatikizapo HEMT ndi zida zina za gallium nitride RF, zomwe zimagwiritsidwa ntchito kwambiri polumikizana ndi 5G, kulumikizana ndi magalimoto, ntchito zodzitetezera, kutumiza deta, komanso ndege.
Kuchuluka kwa ma elekitironi okhuta a silicon carbide ndi gallium nitride ndi kuwirikiza kawiri ndi 2.0 ndi 2.5 kuposa silicon motsatana, kotero kuchuluka kwa magwiridwe antchito a silicon carbide ndi gallium nitride ndi kwakukulu kuposa kwa zida zachikhalidwe za silicon. Komabe, gallium nitride material ili ndi vuto la kukana kutentha bwino, pomwe silicon carbide ili ndi kukana kutentha bwino komanso kutentha bwino, zomwe zingapangitse kuti zida za gallium nitride zisamavutike kutentha bwino, kotero makampaniwa amagwiritsa ntchito silicon carbide yokhala ndi insulation yochepa ngati substrate, ndipo gan epitaxial layer imakulitsidwa pa substrate ya silicon carbide kuti ipange zida za RF.
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Nthawi yotumizira: Julayi-16-2024