Ukukhethwa Kwezinto Zokumboza ze-CVD: Ukuqhathaniswa Kokusebenza Nokusetshenziswa kwe-TiN, Al2O3, SiC

Ukukhetha izinto zokumboza ze-CVD ezifanele kakhulu kubalulekile ekuthuthukiseni ukusebenza kwezingxenye kanye nokuphila isikhathi eside. Lokhu okuthunyelwe kuqhathanisa ngqo izembozo ze-Titanium Nitride (TiN), i-Aluminium Oxide (Al2O3), kanye ne-Silicon Carbide (SiC) CVD ukuze kuqondiswe ukukhethwa kwezinto zezicelo ezithile zezimboni. Ukuqonda amaphrofayili okusebenza ahlukile ezinto ngazinye kubalulekile ekwenzeni izinqumo ezinolwazi. Imakethe yomhlaba wonke yezembozo ze-CVD ifinyelelwe.Ama-USD ayizigidigidi ezingama-20.38 ngo-2023, kanye nokubikezela okubonisa ukukhula okufika ku-USD 44.2 billion ngo-2032, okubonisa izinga lokukhula lonyaka elihlanganisiwe elingu-7.58% ngesikhathi sokubikezela.

Izinto Ezibalulekile Okufanele Uzicabangele

• Izimbozo ze-CVDnjenge-TiN, i-Al2O3, kanye ne-SiC kwenza izingxenye ziqine futhi zihlale isikhathi eside.
• Izembozo ze-TiN zilungele amathuluzi nokuhlobisa; ziqinile futhi ziyamelana nokuguguleka.
• Izembozo ze-Al2O3 zisebenza kahle ezindaweni ezishisa kakhulu futhi ziyamelana namakhemikhali; zivikela izingxenye ekugqwaleni.
• Izembozo ze-SiC zilungele ukushisa okukhulu namakhemikhali, njengasekwenzeni ama-chip ekhompyutha; zihlanzekile kakhulu futhi ziqinile.
• Ukukhetha ingubo efanele kuncike kulokho ingxenye okudingeka ikwenze nokuthi izosetshenziswa kuphi.

Ukuqonda Ubuchwepheshe Bokumboza I-CVD

Kuyini Ukususwa Komusi Wekhemikhali (i-CVD)?

Ukususwa Komhwamuko Wamakhemikhali (i-CVD) inqubo eyinkimbinkimbi ebeka amafilimu amancane ezinto eziqinile ku-substrate evela esigabeni segesi. Le ndlela ihilela uchungechunge lwezimpendulo zamakhemikhali ezenzeka ebusweni be-substrate noma eduze kwayo. Ukusabela kwamakhemikhali okuyisisekelo ku-CVD kufaka phakathiukubola kokushisa, ukunciphisa, ukubola, kanye nokwakheka kwenhlanganisela. Lokhu kusabela kuvame ukubandakanya ukusabela kwesigaba segesi, lapho izinhlobo eziphakathi zakha khona ngokusebenzisa ukusabela kwamakhemikhali okuqala. Ngemva kwalokho, ukusabela kwangaphandle kuhlobene nokusabalala nokusabela kwalezi zinhlobo ebusweni be-substrate, okuholela ekukhuleni kwefilimu okufiswayo. Ezinye izinhlobo zokusabela ezivamile zifaka phakathii-hydrolysis, i-pyrolysis, kanye nokufuduka.

Kungani Izembozo ze-CVD Zibalulekile Ekuthuthukisweni Kwezinto Ezibonakalayo

Izembozo ze-CVD zibalulekile ekuthuthukiseni izakhiwo zezinto ezibonakalayo emikhakheni eyahlukahlukene. Zinikeza izinzuzo ezinkulu ngaphezu kwezinye ubuchwepheshe bokumboza. Isibonelo, izembozo ze-CVD zivikelaukugqwala kanye nokubola, kwandise isikhathi sokuphila kwezingxenye. Abakhiqizi bangakwazi ukwenza lezi zingubo zokumboza zihambisane nemigomo ethile yokusebenza, njengokufinyelela ukungasebenzi kwamakhemikhali. Lobu buchwepheshe buthuthukisa kakhulu ukusebenza kanye nezakhiwo zezifakelo zezokwelapha, buthuthukisa ukuhambisana kwezinto eziphilayo, ukumelana nokuguguleka, ubulukhuni, kanye nokuqina. I-CVD ingcono kakhulu ngokuhambisana, inikeza ukuthungwa kwefilimu okufanayo ngisho nasezindaweni zangaphakathi nezangaphandle eziyinkimbinkimbi. Lokhu kuvumela ukufakwa kwengqimba yezinto ezibonakalayo okufanayo kuzo zonke izindawo ezifakelwe. Izingxenye eziluhlaza zegesi ezisezingeni eliphezulu ziqinisekisa izingubo ngobumsulwa obukhulu. Ngokungafani nezinqubo eziningi ze-PVD, inqubo ye-CVD iyasebenza.akukhawulelwe kuhlelo lokusebenza lomugqa wokubona, okuvumela ukumbozwa kwazo zonke izindawo zengxenye, okuhlanganisa imicu nezimbobo ezingaboni. Ukumbozwa kubopha ebusweni ngesikhathi sokusabela, kudala ukunamathela okuphezulu uma kuqhathaniswa nokumbozwa okujwayelekile kwe-PVD noma ukushisa okuphansi. Ukulungiswa kwegesi yangaphambi kwe-precursor kuvumela ukumbozwa okunamandla okumelana nokuguguleka okuthuthukisiwe, ukugcotshwa okuphezulu, ukumelana nokugqwala, noma ubumsulwa obukhulu.

Ukugqoka kwe-Titanium Nitride (TiN) CVD: Ukusebenza kanye Nezicelo

Izici Ezibalulekile Zokusebenza Kokumbozwa Kwe-TiN CVD

Izembozo ze-Titanium Nitride (TiN) CVD zibonisa izici eziningana zokusebenza ezivelele. Zinobulukhuni obungavamile, ngokuvamile obusukela ku-2000 kuya ku-2500 HV, okuthuthukisa kakhulu ukumelana nokuguguleka. Lobu bulukhuni obuphezulu benza izingxenye ziqine kakhulu ngokumelene namandla akhuhlayo nagugulekayo. I-TiN iphinde inikeze ukungangeni kahle kwamakhemikhali, imelana nokusabela ngezinto eziningi ezigqwalisayo. I-coefficient yayo ephansi yokungqubuzana isiza ukunciphisa ukukhiqizwa kokushisa nokuthuthukisa ukusebenza kahle. Ngaphezu kwalokho, izembozo ze-TiN zinombala wegolide omuhle, okwenza zifaneleke ngezinjongo zokuhlobisa. Izembozo zigcina ubuqotho nokusebenza kwazo emazingeni okushisa aphezulu, yize ukumelana kwayo nokugqwala kungaphansi kwezinye izinto.

Izicelo Ezijwayelekile Zokumboza Nge-TiN CVD

Izimboni zisebenzisa kakhulu izembozo ze-TiN CVD zezinhlelo zokusebenza ezahlukahlukene ezibalulekile ngenxa yezakhiwo zazo eziqinile. Abakhiqizi bavame ukufaka i-TiN ku-amathuluzi okusika, njengemishini yokubhoboza, imishini yokugaya, kanye nama-saw blades, ukuze kwandiswe isikhathi sazo sokuphila nokuthuthukisa ukusebenza kokusika. Izifakelo zezokwelapha nazo ziyazuza ezimbozweni ze-TiN, ezithuthukisa ukuhambisana kwezinto eziphilayo kanye nokumelana nokuguguleka. Izingxenye zezindiza zisebenzisa i-TiN ngenxa yokuqina kwayo kanye nokuvikelwa ezimweni zokusebenza ezinzima. Ngaphezu kwalokho, ukuqeda okukhanga kwegolide kwenza i-TiN ibe ukukhetha okuthandwayo kwezimbozo zokuhlobisa ezintweni ezifana nobucwebe namawashi.

Izinzuzo kanye nokulinganiselwa kwe-TiN CVD Coating

Izembozo ze-TiN CVD zinikeza izinzuzo ezibalulekile. Ziyandisa kakhulu impilo yesevisi yamathuluzi nezingxenye, zinciphisa izindleko zokufaka esikhundleni kanye nesikhathi sokungasebenzi. Izembozo zinikeza ukumelana okuhle kakhulu nokuguguleka, okubalulekile ezingxenyeni ezibhekene nokungqubuzana okuqhubekayo. Ukunamathela kwazo okuhle kuma-substrate ahlukahlukene kuqinisekisa isibopho esithembekile nesihlala isikhathi eside. Kodwa-ke, izembozo ze-TiN zinemikhawulo. Zibonisa ukuzinza kokushisa okuphakathi uma kuqhathaniswa nezinye izinto zobumba ezithuthukisiwe, lapho i-oxidation yenzeka emazingeni okushisa angaphezu kuka-500°C emoyeni. Nakuba ziqinile, zingaba buthakathaka, okungaholela ekuqhekekeni ngaphansi kwemithwalo enzima yomthelela. Inqubo yokufaka imvamisa idinga amazinga okushisa aphezulu, okungakhawulela ukusetshenziswa kwayo ezintweni ezithile ze-substrate.

I-Aluminium Oxide (Al2O3) CVD Coating: Ukusebenza kanye Nezicelo

Izici Eziyinhloko Zokusebenza Kokumbozwa Kwe-Al2O3 CVD

Izembozo ze-Aluminium Oxide (Al2O3) CVD zaziwa ngezakhiwo zazo eziyingqayizivele, okwenza zibe yigugu kakhulu ezindaweni ezahlukene zezimboni. Zibonisa ubulukhuni obuvelele kanye nokuqina okuhle kakhulu kokushisa.

Lezi zingubo zokugqoka ziphinde zinikeze ukungangeni kwamakhemikhali okuphezulu, zimelana nokuhlaselwa ngamakhemikhali amaningi anolaka. Ukumelana kwazo nogesi okuphezulu kuzenza zibe yizivikeli zikagesi ezinhle kakhulu. Ngaphezu kwalokho, izingubo zokugqoka ze-Al2O3 zinikeza ukumelana okuphawulekayo kwe-oxidation, ikakhulukazi emazingeni okushisa aphezulu, zivikela izinto ezingaphansi ekuwohlokeni.

Ukusetshenziswa Okuvamile Kwe-Al2O3 CVD Coating

Izembozo ze-Al2O3 zisetshenziswa kabanzi ezindaweni ezidinga kakhulu lapho ukuguguleka nokugqwala kuyizinto ezibalulekile. Zisebenza njengezinto ezisetshenziswa kakhulu.izixazululo ezisunguliweukuvikela ezinhlotsheni ezahlukahlukene zokusebenza. Abakhiqizi basebenzisa izembozo ze-Al2O3 kuma-substrate e-tungsten ukuze bathuthukise ukumelana ne-oxidation emazingeni okushisa angaphezu kuka-800 °C, ikakhulukazi adlula u-1000 °C, lapho i-tungsten ivame ukwakheka futhi ifake i-WO3 ngaphansi. Lezi zembozo ziphinde zinciphise ngempumelelo izinga le-oxidation lama-alloy e-γ-TiAl phakathi kuka-900–1000 °C.I-Al2O3 iyisistimu yokumboza yakudala yamathuluzi e-carbide aqinisiwe, ezisebenza ngaphansi kwezimo ezidinga ubulukhuni obuhle, ukumelana nokuguguleka, ukubopha okuqinile, kanye nokuqina kokushisa. Ngaphezu kwalokho, abacwaningi bacabangela izembozo ze-Al2O3 njenge-ukuvikela ukumbozwa kukaphethiloli kuma-reactor asheshayo apholiswe yi-lead (ama-LFR)ngenxa yokumelana kwazo nokugqwala okuphezulu ezindaweni zenuzi.

Izinzuzo kanye nemikhawulo ye-Al2O3 CVD Coating

Izembozo ze-Al2O3 zinikeza izinzuzo ezibalulekile, okuhlanganisa ubulukhuni obuhle kakhulu, ukuzinza kwezinga lokushisa eliphezulu, kanye nokumelana okuphezulu kwamakhemikhali kanye nokushiswa kwe-oxidation. Lezi zakhiwo zandisa isikhathi sokuphila kwezingxenye ezimweni ezinzima. Kodwa-ke, izembozo ze-Al2O3 nazo ziletha imikhawulo ethile.

• Izinga lokushisa le-substrate le-CVD, ngokuvamile lizungeze700 °C, iphakeme ngokwanele ukuncibilikisa ama-alloy e-aluminium. Lokhu kunciphisa izinhlobo zezinto ezingamukela isembozo.
• Lokhu kushisa okuphezulu kwenqubo akukuhle ekumbozeni izingxenye zemishini, ikakhulukazi lezo ezenziwe ngezinsimbi ezilula ezinamazinga okuncibilika aphansi, njenge-aluminium alloy, ezisetshenziselwa ukunciphisa isisindo somshini.
• Izinga lokushisa eliphakeme elijwayelekile lokufakwa cishe1050°CKwezembozo ze-Al2O3, ukumbozwa kwe-Al2O3 kuvimbele kakhulu ukuthuthukiswa kwezembozo eziningana ezihlanganisiwe, njenge-TiC/TiN/TiCN/Al2O3.
• Ukwehlisa izinga lokushisa lokufakwa kwe-Al2O3 kuzonciphisa nokucindezeleka okusele okukhona ephepheni okuvame ukubangela ukuqhekeka.

I-Silicon Carbide (SiC) CVD Coating: Ukusebenza kanye Nezicelo

Izici Ezibalulekile Zokusebenza Kokumbozwa Kwe-SiC CVD

Izembozo ze-Silicon Carbide (SiC) CVD zinezakhiwo eziningi ezihlaba umxhwele, okwenza zifaneleke kakhulu ezindaweni ezibucayi. Lezi zembozo zibonisa ubulukhuni obungavamile, ngokuvamile kusukela ku-2000 to 2800 HV(Ubulukhuni bukaVickers). Lobu bulukhuni obuphezulu buhlinzeka ngokumelana nokuguguleka okuphezulu nokuklwebheka. I-SiC iphinde ibe nokushisa okuhle kakhulu, okuvame ukuwela phakathi kuka-116 W/mK kanye300 W/mK. Lesi sici sivumela ukushabalaliswa kokushisa okuphumelelayo. Ngaphezu kwalokho, izembozo ze-SiC zinikeza ukungangeni kahle kwamakhemikhali kanye nobumsulwa obuphezulu kakhulu. Zimelana nokusabela ngama-acid, ama-alkali, namanye amakhemikhali anolaka, okuqinisekisa ukuzinza ezindaweni ezigqwalisayo. Lokhu kumelana kwamakhemikhali, kuhlanganiswe nokuzinza kokushisa okuphezulu, kwenza i-SiC ibe ukukhetha okuqinile kwezinto ezibonakalayo.

Izicelo Ezijwayelekile Zokumboza I-SiC CVD

Izimboni zisebenzisa kakhulu izembozo ze-SiC ezinhlelweni ezifuna ukusebenza okuphezulu nokuthembeka. Ezindiza, abakhiqizi basebenzisa i-SiC ukuzeizingxenye zenjini, izithiyo zokushisa, ama-turbine blades, izivikelo zokushisa, ama-thruster, nama-nozzle e-rocket. Lezi zingxenye zisebenza ngaphansi kwamazinga okushisa aphezulu kanye nezimo ezinzima. Imboni ye-semiconductor iphinde ithembele kakhulu kwi-SiC. Ivikela imishini yokucubungula i-wafer, okuhlanganisa nabathwali be-wafer, amakamelo okuqopha, kanye namakamelo okubeka ekwakhiweni kwe-LED kanye ne-semiconductor. I-SiC ithola nokusetshenziswa kuama-semiconductor anamandla aphezulu kanye nama-frequency aphezulu, ama-RF amplifiers, kanye namadivayisi okushintsha, lapho izakhiwo zayo zikagesi kanye nobumsulwa bayo kubalulekile khona.

Izinzuzo kanye nokulinganiselwa kwe-SiC CVD Coating

Izembozo ze-SiC zinikeza izinzuzo ezibalulekile.ubumsulwa obuphezulu kakhulu bubalulekile ekugcineni izindawo ezingenakho ukungcola, ikakhulukazi ekukhiqizweni kwe-semiconductor. Zihlinzeka ngokuqina ezindaweni ezinzima, zivikela imishini efana nezishintshi zokushisa kanye nama-reactor embonini yamandla kumakhemikhali agqwalisayo kanye nokushisa okukhulu.ukungasebenzi kwamakhemikhali kwe-SiC kuqinisekisa ukuzinza, kwandise isikhathi sokuphila kwemishini futhi kunciphisa izidingo zokulungisa. Amazinga aphezulu okuhlanzeka anciphisa ukungcola, athuthukise ukusebenza kwezicelo ezibucayi. Kodwa-ke, izembozo ze-SiC zinemikhawulo. Amazinga okushisa aphezulu okufakwa okudingekayo kwi-CVD SiC angakhawulela ukusetshenziswa kwayo ezintweni ezithile ze-substrate. Le nqubo ingaba yinkimbinkimbi kakhulu futhi ibize kakhulu uma iqhathaniswa nezinye izindlela zokumboza.

Ukuqhathaniswa Kokusebenza Okuqondile Kwezimbozo ze-CVD: I-TiN vs. I-Al2O3 vs. I-SiC

Ukuhlaziywa Okuqhathanisayo Kokuqina Nokumelana Nokugqokwa

I-CVD Coating ngayinye inikeza izinzuzo ezihlukile ebulukhunini nasekumelaneni nokuguguleka. Izembozo ze-Titanium Nitride (TiN) zivame ukubonisa ubulukhuni be-Vickers obusukela ku-2000 kuya ku-2500 HV. Lokhu kunikeza isivikelo esihle ekugugulekeni okukhuhlayo. I-TiN iphinde iboniseama-coefficient okungqubuzana aphakathi kuka-0.4 no-0.9. Kodwa-ke, ukuqhathanisa okuqondile kwenaniamazinga okuguguleka noma ama-coefficient okungqubuzana phakathi kwe-TiN, Al2O3, kanye ne-SiC CVD coatings awabhalwanga kabanzi ocwaningweni olulodwa oluphelele. I-Aluminium Oxide (Al2O3) coatings ngokuvamile inobulukhuni be-Vickers obungaba ngu-1800 HV 0.5, obunikeza ukumelana okuhle kakhulu kokuguguleka, ikakhulukazi ekusetshenzisweni kwezinga lokushisa eliphezulu. I-Silicon Carbide (SiC) coatings ivelele ngobulukhuni obungavamile, ngokuvamile kusukela ku-2000 kuya ku-2800 HV. Lokhu kwenza i-SiC imelane kakhulu nokuguguleka okukhuhlayo nokugugulekayo, okuvame ukwedlula i-TiN ne-Al2O3 ezimweni ezimbi kakhulu.

Ukuhlaziywa Okuqhathanisayo Kokuzinza Kokushisa Nokumelana Nokushiswa Kwe-Oxidation

Ukuqina kokushisa kanye nokumelana nokushiswa yizinto ezibalulekile ekusetshenzisweni kokushisa okuphezulu. Ukushiswa kwe-TiN kubonisa ukuqina kokushisa okuphakathi. Kuqala ukushiswa emoyeni emazingeni okushisa angaphezu kuka-500°C. Ezimweni ezifakwe umoya-mpilo, ukushiswa kwe-TiNkhipha umoya futhi uchithe ngokuphelele emahoreni ambalwauma kuvezwa ezindaweni zamanzi ezinokushisa okuphezulu. Lokhu kubonisa izimfanelo zokuvikela ezingezinhle ngaphansi kwezimo ezinjalo. Izembozo ze-Aluminium Oxide (Al2O3), ngokuphambene nalokho, zinikeza ukuzinza okuphezulu kokushisa kanye nokumelana nokushiswa kwe-oxidation. Zivikela ngempumelelo izinto ezingaphansi emazingeni okushisa angaphezu kuka-1000°C, okwenza zibe zilungele izindawo ezishisa kakhulu. Izembozo ze-Silicon Carbide (SiC) nazo zibonisa ukuzinza okuvelele kokushisa kanye nokumelana nokushiswa kwe-oxidation. Abacwaningi baye babonisa ukuzinza okuvelele kokushisa kanye nokumelana nokushiswa kwe-oxidation.kuqhathaniswe ukuziphatha kokugqwala kwe-hydrothermal kwe-SiC ne-Al2O3, okugqamisa ukusebenza okuqinile kwe-SiC ezindaweni ezishisayo nezinobuthi. I-SiC igcina ubuqotho bayo kanye nezakhiwo zayo zokuvikela emazingeni okushisa aphezulu kakhulu, ngokuvamile idlula lawo lapho i-TiN izobola khona.

Ukuhlaziywa Okuqhathanisayo Kokungangeni Kwamakhemikhali Nezakhiwo Zikagesi

Ukungangeni kwamakhemikhali kanye nezakhiwo zikagesi zalezi zingubo zokugqoka ziyahlukahluka kakhulu, okuthonya ukufaneleka kwazo ezicelweni ezithile. Izingubo zokugqoka ze-TiN zinikeza ukungangeni kwamakhemikhali okuhle, zimelana nezinto eziningi ezibolayo. Ngogesi, i-TiN enkulu inokumelana kagesi phakathi kuka-1.0 × 10⁻⁷ no-4.0 × 10⁻⁷ Ω·m. I-PVD TiN ikhombisa ukumelana kusuka ku-3.0 × 10⁻⁷ kuya ku-1.0 × 10⁻⁶ Ω·m. I-CVD TiN ikhombisa ububanzi bokumelana obungu-2.0 × 10⁻⁶ kuya ku-1.0 × 10⁻⁴ Ω·m. Lokhu kubeka i-TiN esigabeni se-semiconductor noma se-semi-metallic.

Izembozo ze-Aluminium Oxide (Al2O3) azinawo amakhemikhali amaningi, zimelana nokuhlaselwa yi-acids eminingi, ama-alkali, namanye amakhemikhali anolaka. I-Al2O3 iyisivikelo sikagesi esinamandla. Amafilimu amancane e-Al2O3 akhuliswe nge-Atomic Layer Deposition (ALD) abonisa i-dielectric constant engu-6.7 kumafilimu obukhulu obungu-120 Å. Ubuningi bamanje obuvuzayo kumafilimu e-Al2O3 buyancipha njengoba ukujiya kwefilimu kukhuphuka, ngamanani azungeze i-1 nA/cm² kumafilimu obukhulu. I-voltage yokuqala ye-tunneling ye-Fowler-Nordheim (FN) kumafilimu e-Al2O3 iyanda ngokujiya, kusukela cishe ku-3 V kumafilimu angu-60 Å kuya ku-5.5 V kumafilimu angu-184 Å. Izembozo ze-Silicon Carbide (SiC) nazo zinobugovu bamakhemikhali obungavamile kanye nobumsulwa obuphezulu kakhulu. Zimelana nokusabela okuhlukahlukene kwezinto ezibolayo. I-SiC ingasebenza njenge-semiconductor noma i-insulator kuye ngesakhiwo sayo se-doping kanye ne-crystalline. Ukumelana kwayo kagesi kubalulekile ekusetshenzisweni kuma-semiconductors anamandla aphezulu kanye nemvamisa ephezulu.

Izinto Zokucatshangelwa Ngezindleko Nezinzuzo Zezinto Zokumboza Nge-CVD Ngayinye

Ukuhlola isilinganiso sezindleko nezinzuzo zezinto zokumboza ze-CVD kubalulekile ekwenzeni izinqumo ezinolwazi. Izembozo ze-Titanium Nitride (TiN) ngokuvamile zimelela inketho engabizi kakhulu. Zinikeza ibhalansi eqinile yokuqina, ukumelana nokuguguleka, kanye nokuqedwa kwegolide okukhangayo ngokubonakalayo. Lokhu kwenza i-TiN ibe ukukhetha okungabizi kakhulu kwezinhlelo zokusebenza ezidinga impilo yamathuluzi ethuthukisiwe kanye nokuvikelwa okulinganiselwe ngaphandle kwezidingo ezinkulu zokushisa noma zamakhemikhali. Ukusetshenziswa kwayo kabanzi ekusikeni amathuluzi nezinto zokuhlobisa kubonisa isilinganiso sayo esihle sokusebenza nezindleko zezidingo eziningi ezijwayelekile zezimboni.

Izembozo ze-Aluminium Oxide (Al2O3) zivame ukuhilela ukutshalwa kwezimali kokuqala okuphezulu uma kuqhathaniswa ne-TiN. Kodwa-ke, ukuzinza kwazo okuphezulu kokushisa, ukumelana nokushiswa kwe-oxidation, kanye nokungangeni kwamakhemikhali kuvame ukuthethelela lokhu kukhuphuka kwezindleko. Ekusetshenzisweni ezindaweni ezishisa kakhulu, njengezingxenye zesithando noma izinto zokusika ezithuthukisiwe, i-Al2O3 yandisa kakhulu isikhathi sokuphila kwezingxenye. Lokhu kunciphisa imvamisa yokushintsha kanye nezindleko zokulungisa ngokuhamba kwesikhathi. Ukuqina okuthuthukisiwe kanye nokuvikelwa i-Al2O3 kunikeza ukuguquguquka ekongeni isikhathi eside, okwenza kube ukukhetha okuzuzisayo naphezu kwezindleko eziphezulu kusengaphambili.

Izembozo ze-Silicon Carbide (SiC) zivame ukuba nezindleko eziphezulu kakhulu zokufaka isicelo phakathi kwezinto ezintathu. Izinqubo zokubeka eziyinkimbinkimbi kanye nesidingo sobumsulwa obuphezulu kakhulu kunegalelo kulokhu kusetshenziswa. Naphezu kwezindleko eziphakeme, i-SiC inikeza ukusebenza okungenakuqhathaniswa ezindaweni ezidinga kakhulu. Ubulukhuni bayo obungavamile, ukungangeni kwamakhemikhali, kanye nokuqhuba ukushisa kwenza kube yinto ebalulekile ekusetshenzisweni okubalulekile ekucutshungulweni kwe-semiconductor, izindiza, kanye nezimboni zenuzi. Kule mikhakha, izindleko zokwehluleka kwezingxenye noma ukungcola zidlula kakhulu izindleko zokuqala zezembozo. Ukuphila isikhathi eside kanye nokuvikelwa kwe-SiC kuqinisekisa ukuthembeka nokusebenza nokuphepha, okunikeza imbuyiselo ebalulekile ekutshalweni kwezimali kwezidingo ezikhethekile neziphezulu.

Izici Ezithonya Ukukhethwa Okuhle Kwezinto Zokumboza ze-CVD

Ukukhetha izinto zokumboza ze-CVD ezifanele kakhulu kudinga ukuqonda okuphelele kwezidingo ezithile zohlelo lokusebenza. Izindlela eziningana ezibalulekile zilawula lokhu kukhetha. Ukuqina nokumelana nokuguguleka kubaluleke kakhulu ezingxenyeni ezibhekene nokungqubuzana noma ukuguguleka okuqhubekayo. I-SiC ihamba phambili kulezi zindawo, inikeza ukumelana okuphezulu kokuguguleka, ukuguguleka, kanye nokuguguleka ngenxa yesakhiwo sayo esiminyene, esingenazo izimbobo kanye nokunamathela okuqinile. I-Al2O3 iphinde inikeze ukumelana okuhle kokuguguleka, ikakhulukazi emazingeni okushisa aphezulu, kuyilapho i-TiN inikeza isivikelo esihle ezimweni ezingatheni kakhulu.

Ukumbozwa kwendawo kanye nobunzima nakho kudlala indima ebalulekile. Izembozo ze-CVD ngokuvamile ziphumelela kakhuluukumboza amajiyometri ayinkimbinkimbi kanye nezindawo zangaphakathi ezinobukhulu obufanayo. Zihlinzeka ngokumbozwa okuqhubekayo ezindaweni ezingabonakali. Lesi sici sibalulekile ezingxenyeni eziyinkimbinkimbi lapho kudingeka khona ukuvikelwa okufanayo. Ukumelana kwemvelo namakhemikhali kwengubo kungenye into ebalulekile. Ezintweni ezinolaka njenge-H₂S nama-asidi aqinile, i-SiC ne-Al2O3 zinikeza ukumelana okuphezulu ngenxa yesakhiwo sazo esingenazo izimbobo, zakha isithiyo esiqinile.

Ubukhulu bokumboza, ngokuvamile obusukela kuma-micron angu-25-75, bufana kakhulu kuzo zonke izinhlelo zokusebenza ze-CVD. Lobu bukhulu obuhambisanayo bufaka isandla ekuqedeni okubushelelezi nokucwebezelayo. Izinga lokushisa lokusebenza lokusetshenziswa lithinta kakhulu ukukhetha izinto. I-Al2O3 ne-SiC zifanele amazinga okushisa aphezulu, zivikela izinto eziqinile ngempumelelo. Okokugcina, izindleko zokusetshenziswa, yize ziphakeme kwezinye izinto zokumboza ze-CVD, zivame ukukhombisa ubude besikhathi eside kanye nokuvikelwa. Lokhu kwenza ukutshalwa kwezimali kokuqala kube yinto efanelekile yokwandisa impilo yezingxenye nokuqinisekisa ukusebenza okuthembekile ezindaweni zezimboni eziyinselele.

Izimo Zokusetshenziswa Kwangempela: Ukukhetha Isembozo Se-CVD Esingcono Kakhulu

Ukugqoka kwe-CVD kwamathuluzi okusika nokugaya ngesivinini esikhulu

Amathuluzi okusika nokulungisa ashesha kakhulu adinga ukuqina okumangalisayo kanye nokumelana nokuguguleka. Lawa mathuluzi asebenza ngaphansi kokungqubuzana okukhulu nokushisa, okonakalisa ngokushesha izindawo ezingavikelekile. Ukukhetha ukugquma okulungile kwandisa kakhulu impilo yamathuluzi futhi kuthuthukisa ukusebenza kahle kokulungisa. Ukugquma kwe-Titanium Nitride (TiN) sekusebenze isikhathi eside njengendinganiso yamathuluzi okusika ajwayelekile. Anikeza ubulukhuni obuhle futhi anciphisa ukungqubuzana, okusiza ukuvimbela ukuguguleka kwamathuluzi ngaphambi kwesikhathi. Kodwa-ke, izinhlelo zokusebenza ezikhethekile kakhulu, ikakhulukazi ezibandakanya izinsimbi eziqinile, zidinga ukugquma okunamandla okumelana nokushisa nokukhuhla.

Ukuze kunqunywe insimbi ngesivinini esikhulu, kunezimbozo ze-Aluminium Oxide (Al₂O₃) ezinikezwayoukuzinza okumangalisayo kokushisa kanye namakhemikhaliemazingeni okushisa aphezulu. Lokhu kuzinza kubenza bafaneleke kakhulu ekugcineni ubuqotho bamathuluzi ngesikhathi sokusebenza ngomshini onamandla. Esinye isitha esinamandla kule ndawo yi-Titanium Carbonitride (TiCN). Uma isetshenziswa nge-CVD, i-TiCN inikeza ukumelana okuhle kakhulu nokuguguleka. Lesi sici sibonakala siwusizo kakhulu ekusetshenzisweni kwensimbi, lapho ukufakwa okuqinile emsebenzini kungagugula khona ubuso bamathuluzi ngokushesha. Lezi zingubo ezithuthukisiwe zivumela amathuluzi ukuthi asebenze ngesivinini esiphezulu kanye nokudla, okuholela ekukhiqizweni okwandisiwe kanye nokuphela okuphezulu kwendawo ezingxenyeni ezifakwe umshini.

Ukugqoka kwe-CVD Kwezindawo Zamakhemikhali Eziwohlokayo

Izingxenye ezisebenza ezindaweni zamakhemikhali ezigqwalisayo zibhekene nezinsongo eziqhubekayo zokuhlaselwa ngamakhemikhali, okungaholela ekuwohlokeni kwezinto kanye nokwehluleka kwangaphambi kwesikhathi. Izembozo zokuvikela ezisebenzayo zibalulekile ekuqinisekiseni ukuthi zihlala isikhathi eside futhi zithembekile kulezi zimo ezinzima. Izembozo ze-Aluminium Oxide (Al₂O₃) kanye ne-Silicon Carbide (SiC) CVD zivelele ngokungabi namandla kwamakhemikhali kwazo okuphezulu.

Izembozo ze-Al₂O₃ zisebenza kahle kakhulu ezindaweni ezimanzi ezibucayi kakhulu (SCW). Lezi zimo zinezinga lokushisa eliphakeme, ngokuvamile eduze500 °C, ukucindezela okuphezulu okungu-25 MPa, kanye nama-oxidizing agent aqinile. Izikali ze-oxide ezisekelwe ku-alumina zaziwa kakhulu ngokunciphisa izinhlobo ezahlukene zokugqwala ezimweni ze-SCW. Lokhu kufaka phakathi ukuqhekeka kokugqwala kokucindezeleka, umgodi, kanye nokugqwala okuvamile, okwandisa kakhulu isikhathi sokuphila kwezingxenye.

Izimbozo ze-SiC zivikela kakhulu izinhlanganisela ze-carbon/carbon (C/C) ekungcolisweni kwamafutha emazingeni okushisa aphezulu, ikakhulukazingaphezu kuka-723 K, ezindaweni eziqukethe umoya-mpilo. Lokhu kuvikelwa kubalulekile kuma-composite e-C/C, njengoba ukusetshenziswa kwawo njengezinto zokwakha ezishisa kakhulu kunqunyelwa yi-oxidation. Izembozo ze-SiC ceramic zivikela nama-composite e-C/C ekungcolisweni ezindaweni eziqukethe umhwamuko wamanzi.ngo-1773 KNakuba umhwamuko wamanzi ungasheshisa ukushiswa kwe-SiC ceramics, futhi kusiza ukwakheka kwesendlalelo esinjengengilazi. Lesi sendlalelo esinjengengilazi sisiza ukuvala nokuvikela i-C/C matrix ngokushesha, siqinisekisa ukusebenza okuqinile ngisho nasezimweni ezimanzi nezishisayo.

Ukugqoka kwe-CVD kokumelana nokushisa okuphezulu

Izinto ezivezwe ekushiseni okukhulu kanye nasemkhathini odala i-oxidation zidinga ukumbozwa okungamelana nezimo ezinzima ngaphandle kokuwohloka. Ukumelana ne-oxidation yesikhathi eside emazingeni okushisa angaphezu kuka-1000°C kuyimfuneko ebalulekile yezinhlelo eziningi zezindiza, amandla, kanye nezimboni.

Izembozo ze-NiAl ezilungiselelwe i-CVD zibonisa ukubopha okuqinile ne-substrate kanye nobuningi obuphezulu. Lezi zakhiwo zinegalelo ekumelaneni okungcono kwe-oxidation ekushiseni okuphezulu. Emazingeni okushisa aphezulungaphezu kuka-1100°C, izembozo ze-nickel aluminide zakha ngokushesha isikali se-α-Al₂O₃ esizinzile ngokushisa. Lesi sikali sibalulekile ekuhlinzekeni ukuvikelwa kwe-oxidation kwesikhathi eside ezintweni ezingaphansi.

Izembozo ze-Silicon Carbide (SiC) nazo zibonisa ukumelana okuhle kakhulu kwe-oxidation. Zifeza lokhu ngokwakha ungqimba lwengilazi lwe-SiO₂ oluvikelayo. Lolu ngqimba olufana nengilazi lungalungisa ngempumelelo amaphutha afana nokuqhekeka kanye nama-pores, lugcine ubuqotho bezembozo. Isibonelo, isembozo se-SiC sibonise ukwehla kwesisindo okungu-1 kuphela.0.48 wt%ngemva kwemijikelezo eyisishiyagalolunye yokushisa phakathi kuka-1873 K (1600°C) kanye nokushisa kwegumbi. Lo mphumela ubonisa ukumelana okusebenzayo kwe-oxidation ngisho nangaphansi kokushintshashintsha okukhulu kokushisa. Ngaphezu kwalokho, izembozo ze-SiC/B/SiC ezinezingqimba eziningi zinikezaukuvikelwa okuphezulu kwe-oxidationkwezingxenye ze-C/SiC uma kuqhathaniswa nezingubo ze-SiC ezinezingqimba ezintathu. Lezi zinhlelo ezinezingqimba eziningi zisebenza kahle ebangeni lokushisa elibanzi, kusukela ku-700°C kuya ku-1500°C. I-ZrB₂-SiC nayo ibhekwa njengesisekeloi-ceramic yokushisa okuphezulu kakhulu (i-UHTC)Inikeza ukumelana okuhle kakhulu kwe-oxidation kanye ne-ablation ezindaweni ezishisa kakhulu, okwenza ifaneleke kakhulu ekusetshenzisweni okudinga kakhulu.

Ukugqoka kwe-CVD Kokuvikela Ukushisa Nokugqokwa Kukagesi

Izingxenye zivame ukudinga kokubili ukuvikela ugesi kanye nokuvikelwa okuqinile kokuguguleka, ikakhulukazi ezindaweni ezidinga kakhulu. Ukuvikela ugesi nge-Silicon Carbide (SiC) kuhamba phambili kulezi zindima ezimbili. Kuhlinzeka ngokuphathwa kokushisa okuphezulu kanye nokuvikela ugesi, okubalulekile ekuthembekeni nasekuphileni isikhathi eside kwezinhlelo ezimotweni zikagesi neze-hybrid. Isibonelo, ukuvikela ugesi nge-SiC kubalulekile kuizinhlelo zokuphatha ibhethri kanye ne-electronics yamandla aphezulungaphakathi komkhakha wezimoto. Lezi zinhlelo zokusebenza zidinga ukushabalaliswa kokushisa okusebenzayo ngenkathi kugcinwa ukuhlukaniswa kukagesi.

Izembozo ze-SiC zisetshenziswa kakhulu nasezinhlelweni ze-elekthronikhi ezishisa kakhulu. Zinikeza ukuphathwa okuhle kakhulu kokushisa ngenkathi ziqinisekisa ukuhlukaniswa kukagesi kuma-elekthronikhi kagesi, ukupakishwa kwamadivayisi kagesi, kanye nezingxenye ze-power module. I-SiC isebenza njengento efanelekile yama-insulators kagesi ezindaweni ezidinga ukushisa lapho ama-insulators e-polymer avamile angawohloka khona. Inikeza amandla aphezulu e-dielectric, ngokuvamile asukela ku-15-25 kV/mm.Ngaphandle kwezakhiwo zikagesi, izembozo ze-SiC zinikeza ukuvikelwa kokuguguleka okumangalisayo ezisetshenziswa ezimbonini. Izingxenye ezivikelwe ngezembozo ze-SiC zibonisa impilo yesevisi ethuthukisiwe kakhulu, evame ukuba yinde ngokuphindwe ka-3-5 kunezinto ezivamile, ekusebenzeni kokupompa okusaluketshezi. Lokhu kuthuthukiswa kuvela esimweni sazo esiminyene, esingenazo izimbobo kanye nokungqubuzana okuncishisiwe. Ngokufanayo, izembozo ze-SiC zithuthukisa ukumelana nokuguguleka ezindaweni ezihlukumeza kakhulu njengemisebenzi yokuqhumisa isihlabathi. Izingxenye zamavalvu, izivalo zephampu, ama-nozzle, kanye nezindawo zokuthwala nazo ziyazuza ekusebenzeni okungavamile kokuguguleka kwezembozo ze-SiC, okubhekana ngempumelelo nokuguguleka komshini njengendlela yokuhluleka okuyinhloko.

Ukugqoka kwe-CVD kokucubungula kwe-Semiconductor kanye Nezidingo Zokuhlanzeka Okuphezulu

Imboni ye-semiconductor idinga izinto ezihlanzekile kakhulu kanye nokungasebenzi kahle kwamakhemikhali ukuze kuvinjelwe ukungcola nokuqinisekisa ubuqotho benqubo. I-Solid Silicon Carbide (CVD SiC) iyindlela eyinhloko yokukhetha izingxenye emishinini yokucubungula i-semiconductor. Lokhu kufaka phakathi izingxenye ezifana namasongo nezisekelo ze-RTP/EPI, kanye nezingxenye ze-plasma etch cavity. Abakhiqizi bakhetha i-CVD SiC ngenxa yobumsulwa bayo obuphezulu kakhulu,kudlula u-99.9995%. Iphinde inikeze ukumelana okumangalisayo namakhemikhali. Ngaphezu kwalokho, i-CVD SiC inciphisa ukukhiqizwa kwezinhlayiya ngoba ayinazo izigaba zesibili emaphethelweni okusanhlamvu. Lokhu kungahlanzwa ngempumelelo nge-HF/HCl eshisayo ngaphandle kokuwohloka okukhulu. Lesi sici senza impilo yenkonzo ende kanye nezinhlayiya ezimbalwa, ezibalulekile ekugcineni izimo ezihlanzekile ezidingekayo ekukhiqizweni kwe-semiconductor.

Ukugqoka kwe-CVD kwezinhlelo ze-Multilayer kanye nokusebenza okuthuthukisiwe

Izinhlelo zokumboza ezinezingqimba eziningi zihlanganisa izinto ezahlukene ukuze kufezwe ukusebenza okuthuthukisiwe okungaphezu kwalokho okunganikezwa yingqimba eyodwa. Lezi zinhlelo zisebenzisa izakhiwo ezihlukile zengqimba ngayinye ukudala umphumela wokubambisana. Isibonelo, ungqimba olulodwa lunganikeza ubulukhuni obuhle kakhulu, kanti olunye lunikeza ukumelana nokugqwala okuphezulu noma ukuzinza kokushisa. Le ndlela ivumela onjiniyela ukuthi bahlele ukugqoka ngokufanele izidingo ezithile zohlelo lokusebenza. Izinhlelo ze-multilayer zinganqoba ukulinganiselwa kwezinto ngazinye. Isibonelo, ungqimba oluqinile kodwa oluthambile lungahlanganiswa nengqimba eqinile, ethambile kakhulu ukuze kuthuthukiswe ukumelana nokuqhekeka okuphelele. Ngokufanayo, ungqimba olunokumelana okuphezulu kwe-oxidation lungavikela ungqimba olungaphansi olunikeza ukumelana okuhle kakhulu kokuguguleka kodwa lusengozini yokuwohloka kwezinga lokushisa eliphezulu. Lokhu kuhlanganiswa kwezinto okuqondiwe kuholela ekumbozweni okuqinile kakhulu, isikhathi eside sokuphila, kanye nokusebenza kahle okuthuthukisiwe ezindaweni eziyinkimbinkimbi zezimboni.

Ukukhetha okuhle kwezinto zokumboza ze-CVD kuncike ngokuphelele ezidingweni ezithile zohlelo lokusebenza. Izingubo zokumboza ze-TiN, Al2O3, kanye ne-SiC CVD ngayinye inikeza izinzuzo ezihlukile zezinselele ezahlukene zezimboni. Ukwenza izinqumo ezinolwazi ngokusekelwe kumaphrofayili abo okusebenza ahlukile kukhulisa ubude besikhathi sezingxenye kanye nokusebenza kahle. Onjiniyela kumele bacabangele ngokucophelela zonke izici ukuze bakhethe izinto ezifanela izidingo zabo ezithile. Lokhu kuqinisekisa ukuvikelwa okuphezulu kanye nokuphila isikhathi eside kwenkonzo yezingxenye ezibalulekile.

Imibuzo Evame Ukubuzwa

Iyini inzuzo eyinhloko yokugqoka i-TiN CVD?

Izembozo ze-TiN zinikeza ubulukhuni obuhle kakhulu kanye nokumelana nokuguguleka. Ziphinde zinikeze ukungangeni kahle kwamakhemikhali. Izimboni eziningi zisebenzisa i-TiN ekusikeni amathuluzi kanye nezinhlelo zokuhlobisa. Ilinganisela ukusebenza kanye nezindleko eziphumelelayo.

Yikuphi ukugqoka kwe-CVD okunikeza ukumelana okuhle kakhulu kwe-oxidation emazingeni okushisa aphezulu kakhulu?

Izembozo ze-Al2O3 kanye ne-SiC CVD zombili zinikeza ukumelana okuphezulu kwe-oxidation. I-Al2O3 ivikela izinto ezingaphezu kuka-1000°C. I-SiC yakha ungqimba lwengilazi ye-SiO2 evikelayo, olusebenza kahle ngisho naku-1600°C. Zisebenza kahle kakhulu ekushiseni okukhulu.

Kungani ukugqoka kwe-SiC CVD kukhethwa kakhulu ekucutshungulweni kwe-semiconductor?

Izembozo ze-SiC zinikeza ubumsulwa obuphezulu kakhulu, obudlula u-99.9995%. Zinikeza ukumelana kwamakhemikhali okumangalisayo futhi zinciphisa ukukhiqizwa kwezinhlayiya. Lezi zakhiwo zibalulekile ekuvimbeleni ukungcola ezindaweni zokukhiqiza ze-semiconductor ezizwelayo.

Ingabe izembozo ze-CVD zinemikhawulo maqondana nezinto zokwakha i-substrate?

Yebo, izinqubo ze-CVD zivame ukudinga amazinga okushisa aphezulu okufakwa. Lokhu kunciphisa ukusetshenziswa kwazo ezintweni ezithile ze-substrate. Isibonelo, amazinga okushisa aphezulu angancibilikisa izinsimbi ezinamazinga aphansi okuncibilika njenge-aluminium alloys.