Ndi kupita patsogolo kwa ukadaulo, makampani opanga ma optoelectronic, makamaka ukadaulo wa LED (Light Emitting Diode), wakhala gawo lofunikira kwambiri pamakina amakono owunikira, kuwonetsa, ndi kulumikizana. Njira yopangira ma LED imaphatikizapo magawo angapo ofunikira, omwe pakati pawo kupukuta kumachita gawo lofunikira pakuwonetsetsa kuti chip ikugwira ntchito bwino komanso yabwino. Pamene kufunikira kwa magwiridwe antchito apamwamba komanso kukonza bwino kukuwonjezeka, kusankha zipangizo zopukuta kumakhudza kwambiri njira yonse. Pachifukwa ichi, Silicon Carbide (SiC), monga chida chatsopano chonyamulira, yatchuka kwambiri chifukwa cha kugwiritsidwa ntchito kwake popukuta ma LED.
Nkhaniyi ikuyang'ana kwambiri pakugwiritsa ntchito mbale zonyamulira za Silicon Carbide muNjira yopangira LED, kusanthula ubwino wawo, makhalidwe awo, ndi momwe zinthuzi zimathandizira kukonza njira zopangira ma LED.
I. Chidule cha Njira Yopangira Ma LED
Kujambula mu njira yopangira ma LED kumatanthauza njira yomwe imagwiritsidwa ntchito popanga ma microstructures abwino pa semiconductor substrate, potero kukwaniritsa mawonekedwe ofunikira a kuwala ndi magetsi. Kulondola ndi khalidwe la njira yojambula kumakhudza mwachindunji magwiridwe antchito a ma chips a LED, kuphatikizapo kuwala, kutentha kwa utoto, ndi kugwiritsa ntchito bwino mphamvu.
Kuduladula kumatha kugawidwa m'magulu awiri: kuduladula kouma ndi kuduladula konyowa. Kuduladula kouma kumaphatikizapo kugwiritsa ntchito plasma kapena lasers poduladula ndipo nthawi zambiri kumagwiritsidwa ntchito poduladula bwino kwambiri komanso posankha bwino. Kuduladula konyowa, kumbali ina, kumagwiritsa ntchito njira zamankhwala poduladula zinthuzo ndipo nthawi zambiri kumagwiritsidwa ntchito poduladula zinthuzo pamlingo waukulu. Mosasamala kanthu za mtundu wa kuduladula, kusankha zinthu zonyamulira mbale kumakhudza kwambiri zotsatira za kuduladula ndi khalidwe lomaliza la chip.
II. Chiyambi cha Silicon Carbide (SiC)
Silikoni Carbide (SiC)ndi chinthu chopangidwa ndi silicon (Si) ndi kaboni (C). Ili ndi zinthu zambiri zabwino kwambiri zakuthupi ndi zamakemikolo, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito kutentha kwambiri, mphamvu zambiri, komanso pafupipafupi kwambiri. SiC ndi semiconductor ya wide-bandgap, zomwe zikutanthauza kuti imatha kugwira ntchito bwino pansi pa mikhalidwe yovuta, monga magetsi ambiri komanso pafupipafupi kwambiri.
Makhalidwe akuluakulu a SiC ndi awa:
1. Kutentha Kwambiri: SiC ili ndi mphamvu yotenthetsera ya 120-170 W/m·K, yomwe ndi yapamwamba kwambiri kuposa zipangizo zachikhalidwe za silicon (Si). Izi zimathandiza SiC kutulutsa kutentha bwino, ndikusunga bata mu ntchito zamphamvu kwambiri.
2. Kutentha Kwambiri Kukaniza: SiC imatha kupirira kutentha kwambiri (kupitirira 1000°C) popanda kutaya magwiridwe antchito, zomwe zimapangitsa kuti ikhale yoyenera kwambiri m'malo otentha kwambiri.
3.Kukhazikika Kwabwino Kwambiri kwa Mankhwala: SiC imalimbana ndi zochita zambiri za mankhwala, zomwe zimapangitsa kuti dzimbiri likhale lolimba.
4. Chingwe Chokulirapo: Kusiyana kwakukulu kwa SiC kumalola kuti igwire ntchito bwino pansi pa mphamvu yamagetsi komanso ma frequency apamwamba, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsa ntchito ukadaulo wosiyanasiyana wapamwamba.
Zinthu zimenezi zimapangitsa SiC kukhala chinthu chabwino kwambiri chogwiritsidwa ntchito popanga ma LED, makamaka pokonza.
III. Ubwino wa Mapepala Onyamulira a Silicon Carbide mu Kujambula kwa LED
1.Kukana Kutentha Kwambiri
Pa nthawi yokonza LED, makamaka pokonza youma, mbale yonyamulira imakumana ndi kutentha kwambiri chifukwa cha mphamvu yochokera ku plasma kapena lasers. Zipangizo zachikhalidwe monga silicon (Si) kapena quartz (SiO₂) zimatha kutaya kukhazikika kwa kapangidwe kake kapena kukulitsa kutentha, zomwe zimapangitsa kuti kulondola kuchepe. Silicon carbide, yokhala ndi kukana kutentha kwambiri, imatha kukhala yokhazikika m'malo otentha kwambiri popanda kusintha kapena kuwonongeka, kuonetsetsa kuti njira yokonza ikuyenda bwino.
2.Kuwongolera Kutentha Kwabwino
Kusamalira kutentha ndi nkhani yofunika kwambiri popanga ma LED. Ma chips a LED amphamvu kwambiri amapanga kutentha kwakukulu panthawi yogwira ntchito, ndipo ngati sanatayidwe bwino, amatha kusokoneza magwiridwe antchito a chip. Kutenthetsa kwakukulu kwa SiC kumayendetsa bwino kutentha kutali ndi chips ya LED ndikufalikira kumalo ozungulira, zomwe sizimangowonjezera kutentha panthawi yokonza komanso zimathandizira magwiridwe antchito onse komanso moyo wautali wa LED.
3.Kuchepetsa Kuipitsidwa ndi Kuwongolera Kulondola
Pa nthawi yokonza LED, zinthu zomwe zili mu mbale yonyamulira ziyenera kukhala ndi kukhazikika kwabwino kwa mankhwala kuti zipewe kuyanjana ndi zakumwa kapena mpweya wowononga, zomwe zingayambitse kuipitsidwa kapena kusokoneza kulondola kwa kukonza. Kukana kwamphamvu kwa SiC ku mankhwala ambiri owononga kumathandiza kuti ikhale yokhazikika kwa nthawi yayitali m'malo ovuta a mankhwala. Izi zimatsimikizira kuti njira yokonza imakhala yolondola komanso yokhazikika, pomwe ikupewa kuyanjana kosafunikira kwa mankhwala komwe kungakhudze magwiridwe antchito a LED.
4.Zotsalira Zochepa Zokongoletsa
Zipangizo zachikhalidwe zonyamulira mbale zimatha kuchita zinthu zothira, kusiya zotsalira zomwe zimakhala zovuta kuchotsa, zomwe zingasokoneze ubwino wa thira ndikusokoneza magwiridwe antchito a ma chips a LED. SiC, chifukwa cha kusagwira ntchito kwa mankhwala, imapewa kupanga zotsalira zotere, zomwe zimapangitsa kuti pakhale zokolola zambiri komanso kudalirika kwa chinthu chomaliza.
5.Kulimba ndi Kukhazikika Kwambiri
Silicon carbide sikuti imangowonetsa makhalidwe abwino okha komanso imakhala ndi moyo wautali. Poyerekeza ndi zipangizo zina, SiC siitopa kwambiri, kukalamba, kapena kuwonongeka pakapita nthawi, zomwe zimachepetsa ndalama zokonzera komanso nthawi zambiri zosinthira. Izi zimawonjezera kukhazikika kwa mzere wopangira.
IV. Mavuto ndi Mayankho a SiC Carrier Plates mu LED Etching
Ngakhale SiC ili ndi ubwino wambiri pakujambula LED, pali zovuta zina. Choyamba, kukonza SiC kumakhala kovuta chifukwa cha kuuma kwake kwakukulu komanso kusweka kwake. Kusamala kwambiri kuyenera kutengedwa podula ndi kupukuta kuti zinthu zisawonongeke. Kachiwiri, mtengo wa mbale zonyamulira za SiC ndi wokwera poyerekeza ndi zipangizo zachikhalidwe, zomwe zingawonjezere mtengo wonse wopanga LED.
Pofuna kuthana ndi mavutowa, ofufuza ndi mainjiniya akugwira ntchito yokonza njira zopangira zinthu za SiC ndikufufuza ukadaulo watsopano wopangira zinthu kuti achepetse ndalama zopangira ndikuwonjezera magwiridwe antchito. Mwachitsanzo, kukonza njira yokulira makristalo ndikugwiritsa ntchito njira zapamwamba zodulira kungachepetse mtengo wa mbale zonyamulira za SiC. Kuphatikiza apo, ukadaulo watsopano wopaka pamwamba ukhoza kuwonjezera kulimba ndi kukana dzimbiri kwa SiC, ndikupititsa patsogolo magwiridwe ake pakujambula kwa LED.
Nthawi yotumizira: Okutobala-22-2025