A cikin masana'antar semiconductor, substrates sune kayan da aikin na'ura ya dogara da su. Halayen zahiri, na zafi, da na lantarki suna shafar inganci, aminci, da iyakokin aikace-aikacen kai tsaye. Daga cikin dukkan zaɓuɓɓuka, saffir (Al₂O₃), silicon (Si), da silicon carbide (SiC) sun zama substrates da aka fi amfani da su, kowannensu ya yi fice a fannoni daban-daban na fasaha. Wannan labarin yana bincika halayen kayansu, yanayin aikace-aikacen, da kuma yanayin ci gaba na gaba.
Sapphire: Dokin Aiki Mai Kyau
Sapphire wani nau'in lu'ulu'u ne na aluminum oxide mai siffar lu'ulu'u ɗaya tare da layin hexagonal. Manyan halayensa sun haɗa da tauri na musamman (ƙarfin Mohs 9), bayyananniyar haske daga ultraviolet zuwa infrared, da juriyar sinadarai mai ƙarfi, wanda hakan ya sa ya dace da na'urorin optoelectronic da yanayi mai tsauri. Dabaru na ci gaba kamar Hanyar Musayar Zafi da hanyar Kyropoulos, tare da goge sinadarai-injini (CMP), suna samar da wafers tare da ƙaiƙayin saman sub-nanometer.
Ana amfani da ƙananan duwatsu masu launin shuɗi a cikin LEDs da Micro-LEDs a matsayin yadudduka na GaN, inda ƙananan duwatsu masu launin shuɗi masu siffar saffir (PSS) ke inganta ingancin fitar da haske. Haka kuma ana amfani da su a cikin na'urorin RF masu yawan mita saboda halayensu na rufin lantarki, da kuma a cikin aikace-aikacen lantarki na masu amfani da su da na sararin samaniya a matsayin tagogi masu kariya da murfin firikwensin. Iyakoki sun haɗa da ƙarancin ƙarfin wutar lantarki (35–42 W/m·K) da rashin daidaituwar lattice da GaN, wanda ke buƙatar layukan buffer don rage lahani.
Silicon: Gidauniyar Microelectronics
Silicon ya kasance ginshiƙin kayan lantarki na gargajiya saboda yanayin masana'antu mai girma, daidaitaccen ikon wutar lantarki ta hanyar doping, da kuma matsakaicin ƙarfin zafi (mai jure zafi ~150 W/m·K, wurin narkewa 1410°C). Sama da kashi 90% na da'irori masu haɗawa, gami da CPUs, ƙwaƙwalwar ajiya, da na'urorin dabaru, ana ƙera su ne akan wafers na silicon. Silicon kuma yana mamaye ƙwayoyin photovoltaic kuma ana amfani da shi sosai a cikin na'urorin wutar lantarki masu ƙarancin ƙarfi zuwa matsakaici kamar IGBTs da MOSFETs.
Duk da haka, silicon yana fuskantar ƙalubale a aikace-aikacen wutar lantarki mai ƙarfi da yawan amfani da shi saboda ƙarancin bandgip (1.12 eV) da kuma bandgip kai tsaye, wanda ke iyakance ingancin fitar da haske.
Silicon Carbide: Mai Ƙirƙira Mai Ƙarfi
SiC wani abu ne na semiconductor na ƙarni na uku wanda ke da faɗin bandgap (3.2 eV), ƙarfin lantarki mai ƙarfi (3 MV/cm), ƙarfin lantarki mai ƙarfi (~490 W/m·K), da saurin cika electron (~2 × 10⁷ cm/s). Waɗannan halaye sun sa ya zama daidai ga na'urori masu ƙarfin lantarki mai ƙarfi, ƙarfin lantarki mai ƙarfi, da na'urori masu yawan mita. Ana shuka SiC substrates ta hanyar jigilar tururi na zahiri (PVT) a yanayin zafi sama da 2000°C, tare da buƙatun sarrafawa masu rikitarwa da daidaito.
Aikace-aikacen sun haɗa da motocin lantarki, inda SiC MOSFETs ke inganta ingancin inverter da kashi 5-10%, tsarin sadarwa na 5G ta amfani da SiC mai rufewa na rabin-ruwa don na'urorin GaN RF, da kuma grid mai wayo tare da watsa wutar lantarki mai ƙarfin lantarki (HVDC) wanda ke rage asarar makamashi har zuwa kashi 30%. Iyakoki sune tsada mai yawa (wafers na inci 6 sun fi tsada sau 20-30 fiye da silicon) da ƙalubalen sarrafawa saboda tsananin tauri.
Matsayin Karin Aiki da Hasashen Nan Gaba
Sapphire, silicon, da SiC suna samar da yanayin ƙasa mai dacewa a masana'antar semiconductor. Sapphire ta mamaye optoelectronics, silicon tana tallafawa microelectronics na gargajiya da na'urorin wutar lantarki masu ƙarancin ƙarfi zuwa matsakaici, kuma SiC tana jagorantar na'urorin lantarki masu ƙarfin lantarki mai ƙarfi, mai yawan mita, da kuma mai inganci.
Ci gaban da za a samu nan gaba ya haɗa da faɗaɗa amfani da sapphire a cikin LEDs masu zurfi da ƙananan LEDs, wanda ke ba da damar GaN heteroepitaxy na Si don haɓaka aikin mita mai yawa, da kuma haɓaka samar da wafer na SiC zuwa inci 8 tare da ingantaccen yawan amfanin ƙasa da inganci na farashi. Tare, waɗannan kayan suna haifar da ƙirƙira a cikin 5G, AI, da motsi na lantarki, suna tsara ƙarni na gaba na fasahar semiconductor.
Lokacin Saƙo: Nuwamba-24-2025