Kera semiconductor yana aiki ne a mahadar yanayi mai tsauri da kuma yanayi mai tsauri. Tsaruka kamar epitaxy, girma na lu'ulu'u, da kuma annealing mai zafi sosai akai-akai sun wuce 1000°C, inda ko da ƙananan canjin zafi na iya haifar da bambance-bambancen da za a iya aunawa a cikin kauri na fim, rarrabawar dopant, da kuma aikin na'ura. A cikin wannan mahallin, kayan da ke ba da damar yanayin zafi mai karko da maimaituwa ba su da taimako—su ne tushen.
Daga cikin waɗannan kayan,ji na graphiteya bayyana a matsayin muhimmin abin da ke taimakawa wajen sarrafa zafi a cikin hanyoyin semiconductor na zamani. Sau da yawa ana watsi da shi idan aka kwatanta da wafers ko kayan aikin adanawa, tsarin rufin graphite - musamman ji na graphite mai tsabta don rufin zafi - suna taka muhimmiyar rawa wajen kiyaye daidaiton tsari, inganta yawan amfanin ƙasa, da kuma tallafawa sauyawa zuwa semiconductor masu faɗi kamar SiC da GaN.
Yanayin Jikin Graphite
Jikin graphite, wani lokacin ana kiransa daji na fiber carbon, abu ne mai laushi, mai laushi wanda ya ƙunshi zaruruwan carbon da aka haɗa waɗanda aka yi musu magani da zafi don samun tsarki mai yawa da kwanciyar hankali na tsari. Dangane da hanyoyin sarrafawa, ana iya samar da shi azaman ji mai laushi na rufi,ji mai tauri na graphite, ko kuma jifa mai tauri na graphite, kowannensu an tsara shi ne don takamaiman buƙatun zafi da na inji.
Abin da ya bambanta rufin graphite da kayan rufi na gargajiya shine haɗinsa na musamman na halaye. Yana nuna ƙarancin ƙarfin zafi, wanda ke ba da damar riƙe zafi mai inganci ko da a cikin yanayin zafi mai yawa. A lokaci guda, yana kiyaye daidaiton tsari a yanayin zafi sama da 2000°C a cikin yanayi mara aiki ko ragewa. Rashin daidaiton sinadarai da ƙarancin ƙazanta - musamman a cikin kayan semiconductor - suna tabbatar da ƙarancin haɗarin gurɓatawa, wanda yake da mahimmanci a cikin ayyukan ƙera gaba.
A cikin aikace-aikacen ci gaba, ana ƙara inganta jikewar graphite mai tsabta don rufin zafi don rage ƙazanta na ƙarfe zuwa matakan ppm ko ma sub-ppm. Wannan matakin tsarkin ya yi daidai da ƙa'idodin sarrafa gurɓatawa na masana'antar semiconductor na zamani, musamman a cikin hanyoyin da suka shafi semiconductor masu haɗawa.
Aikace-aikace a cikin Manyan Tsarin Semiconductor
Mafi mahimmancin amfani da ji na graphite yana cikin ikonsa na injiniya da daidaita filayen zafi a cikin nau'ikan hanyoyin zafi masu yawa. A cikin ci gaban epitaxial, ko don silicon, silicon carbide, ko gallium nitride, kiyaye rarrabawar zafin jiki iri ɗaya a saman wafer yana da mahimmanci. Yawanci ana haɗa ji na graphite cikin reactor a matsayin Layer mai rufewa, an naɗe shi a kusa da abubuwan dumama, ko kuma an sanya shi a bayan na'urori masu auna sigina. Ta hanyar rage saurin yanayin zafi na radial da axial, yana ba da damar daidaiton ƙimar girma da halayen kayan iri ɗaya, yana shafar aikin na'urar da yawan amfanin ƙasa kai tsaye.
A cikin epitaxy na silicon carbide, inda yanayin zafin aiki zai iya kaiwa 1600°C, jikewar rufin graphite ya zama ba makawa. Matsayinsa ya wuce rufin mai sauƙi; yana tsara yanayin zafi a cikin reactor, yana tabbatar da daidaiton halayen tururi da rage damuwa ta zafi akan wafers. Ba tare da irin wannan iko ba, matsaloli kamar rashin daidaiton kauri, warpage na wafer, da samuwar lahani suna ƙara bayyana sosai.
Tsarin girma na lu'ulu'u ya ƙara nuna mahimmancin dabarun jikewar graphite. A cikin hanyoyi kamar jigilar tururi na zahiri (PVT) don SiC ko tsarin Czochralski don silicon, canjin zafi a cikin ɗakin girma yana ƙayyade ingancin lu'ulu'u. A nan, ana amfani da jikewar graphite mai tauri ko jike mai tauri don ƙirƙirar yankunan kariya masu sarrafawa. Ta hanyar daidaita yawan ji, kauri, da tsari, injiniyoyi na iya daidaita kwararar zafi, ta haka yana tasiri ƙimar girma na lu'ulu'u, yawan lahani, da ingancin boule gabaɗaya. A cikin haɓakar lu'ulu'u na SiC, irin wannan sarrafa zafi yana da alaƙa kai tsaye da rage ƙananan bututu da wargajewa.
Jikin graphitekuma yana taka muhimmiyar rawa wajen adana tururin sinadarai (CVD) da kuma tsarin adana tururin sinadarai na ƙarfe (MOCVD). Kamar yadda ake ji a cikin graphite, yana taimakawa wajen kiyaye yanayin zafi mai ɗorewa a cikin na'urar, yana rage asarar zafi da kuma rage tasirin sanyi a bango. Wannan yana taimakawa wajen inganta daidaiton ajiya da kuma maimaita aiki, musamman a manyan yanayin samarwa.
A cikin hanyoyin rage zafi da kuma yaɗuwa, musamman waɗanda ke da alaƙa da na'urorin semiconductors masu faɗi-faɗi, ji na graphite yana taimakawa wajen inganta makamashi da kwanciyar hankali na zafi. Ta hanyar rage yawan watsa zafi, yana ba wa tanderu damar kiyaye yanayin zafi mai daidaito tare da ƙarancin shigar da makamashi, yayin da kuma rage damuwa game da zagayowar zafi akan abubuwan da ke cikin tsari.
Bayan ƙera wafer, ana amfani da jil ɗin graphite sosai wajen sarrafa kayan sama, ciki har da yin foda, ƙera yumbu, da kuma tsarkake sassan graphite. Waɗannan hanyoyin, duk da cewa ba koyaushe ake iya ganin su a cikin masana'antar semiconductor ba, suna da mahimmanci don samar da kayan aiki masu inganci waɗanda ke ƙarfafa ƙera na'urori na zamani.
Yanayi: Zuwa ga Tsarkakakken Tsarkaka da Haɗakar Aiki
Yayin da masana'antar semiconductor ke ci gaba da bunƙasa zuwa ga aikace-aikace masu wahala—musamman a cikin motocin lantarki, makamashi mai sabuntawa, da na'urorin lantarki masu yawan mita—buƙatun da aka sanya akan kayan sarrafa zafi suna ƙara zama masu tsauri. Wannan yanayin ya bayyana musamman a cikin saurin amfani da fasahar SiC da GaN, inda yanayin zafi mai yawa da tagogi masu ƙarfi ke buƙatar ingantaccen aikin rufin.
Ɗaya daga cikin manyan ci gaba shine ƙoƙarin da ake yi na samar da kayan da suka fi tsafta. Ana ƙera na'urar graphite mai tsafta don kare zafi da ƙananan matakan ƙazanta don cika ƙa'idodin gurɓatawa na masana'antun zamani. A lokaci guda, sabbin abubuwa kamar su na'urar graphite mai tauri da na'urar graphite mai tauri suna ba da damar sarrafa filin zafi daidai da tsawon rai.
Wani muhimmin yanayi shine haɗa murfin kariya, kamar silicon carbide (SiC), a saman graphite. Waɗannan murfin suna ƙara juriya ga iskar shaka, rage samar da barbashi, da kuma ƙara juriyar aiki, wanda ke magance wasu ƙuntatawa na gargajiya na kayan rufin da aka yi da carbon.
Ina kallon gaba,ji na graphiteAna sa ran zai rikide daga wani abu mai hana ruwa shiga zuwa wani abu da aka ƙera sosai a cikin ƙirar kayan aikin semiconductor. Ta hanyar ingantaccen sarrafa kayan aiki da keɓancewa, zai ci gaba da tallafawa masana'antar don neman ingantaccen aiki, aminci mafi girma, da kuma tsauraran matakan sarrafa tsari.
Lokacin Saƙo: Afrilu-17-2026