Mphete zoyang'ana kwambiri za CVDAmagwira ntchito yofunika kwambiri pakujambula kwa semiconductor kwamakono mwa kukhazikika malire a plasma ndikuwonetsetsa kuti ma ion amagawidwa mofanana pa wafer. Nkhaniyi ikufotokoza chifukwa chake ndi ofunikira pa ma node apamwamba, ikuwonetsa momwe amakhudzira kufanana kwa etch, kuwongolera ma CD, kuchepetsa kuipitsidwa, komanso kuchuluka kwa njira yonse yogwirira ntchito.
Ⅰ. Kuchokera ku Plasma Etching mpaka ku Focused Ring Engineering
Kujambula plasma ndi imodzi mwa njira zofunika kwambiri zopangira ma patterning pakupanga ma semiconductor amakono, zomwe zimathandiza kupanga zinthu za nanoscale zofunika pa zipangizo zamakono za logic ndi memory. Pamene ma node aukadaulo akupitirira kuchepa pansi pa ma nanometer 10 ndipo mapangidwe a zipangizo akusintha kupita ku FinFET ndi Gate-All-Around (GAA), kulekerera kwa kusintha kwa njira kwachepa kwambiri. Masiku ano, magawo monga etch uniformity, critical dimension (CD), ndi defect defect defect ayenera kulamulidwa ndi pafupifupi atomic precision.
Ngakhale kuti kukonza njira nthawi zambiri kumayang'ana kwambiri pa plasma chemistry, mphamvu ya ma radio frequency (RF), ndi kapangidwe ka chipinda, chinthu chofunikira kwambiri—koma nthawi zambiri sichidziwika—chimakhala pakuwongolera momwe zinthu zilili m'mphepete mwa wafer. Apa ndi pomwe mphete yolunjika imagwira ntchito yofunika kwambiri. Ili mozungulira wafer pa electrostatic chuck (ESC), mphete yolunjika imagwira ntchito ngati chosinthira malire, kusintha mawonekedwe amagetsi am'deralo, kukhazikika kwa plasma sheath, ndikuwonetsetsa kuti ma ion amagawidwa mofanana pamwamba pa wafer yonse.
M'malo opangidwa bwino kwambiri, mphete zowunikira zophimbidwa ndi chemical vapor deposition (CVD) zakhala muyezo wamakampani chifukwa cha zinthu zawo zapamwamba. Zigawozi sizimangogwiritsidwa ntchito zokha; ndi malo opangidwa mwaluso omwe amakhudza mwachindunji machitidwe a plasma, kukhazikika kwa njira, komanso pomaliza pake amatsimikiza kuchuluka kwa chipangizocho.
Ⅱ. Chifukwa Chake Mphete Zoyang'ana Kwambiri Ndi Zofunika Kwambiri Pakujambula Molondola Kwambiri
Mu machitidwe odulira a plasma, m'mphepete mwa wafer mumakhala kusagwirizana mu mikhalidwe yonse ya geometry ndi malire amagetsi. Popanda njira zoyenera zolipirira, kusagwirizana kumeneku kumabweretsa kusokonekera kwakukulu mu gawo lamagetsi ndi plasma sheath, zomwe zimayambitsa chomwe chimatchedwa "edge effect." Zotsatirazi zimawonekera ngati ma ion incidence angles osafanana komanso kusinthasintha kwa kuchuluka kwa ma ion, zomwe zimapangitsa kuti pakhale kusokonekera kwa etch rates ndi etch profiles pafupi ndi m'mphepete mwa wafer.
Kafukufuku woyesera ndi wa chiphunzitso akuwonetsa kuti, popanda mapangidwe a m'mphepete, dera lomwe limafikira mamilimita angapo mkati kuchokera ku m'mphepete mwa wafer limakhala malo osagwiritsidwa ntchito a m'mphepete¹. Kwa ma node apamwamba aukadaulo, komwe kukula kwa ma chip ndi kwakukulu ndipo malire a process ndi ochepa kwambiri, kutayika kwa malo otere sikuvomerezeka pazachuma.
Kuyambitsa mphete yolunjika bwino kumakulitsa malire a plasma kupita kunja kupitirira m'mphepete mwa wafer, motero kupanga kapangidwe ka chidebe chofanana. Mwa kupereka malo olamulidwa ndi magetsi ndi enieni, mphete yolunjika imaonetsetsa kuti njira za ayoni zimakhalabe zofanana kwambiri pamwamba pa wafer yonse. Izi ndizofunikira kwambiri kuti pakhale kufanana komwe kumafunikira popanga zinthu zamakono; m'malo opangira zinthu zotere, cholinga cha kufanana kwa etch mkati mwa wafer nthawi zambiri chimakhala mkati mwa ±2%.
Kuphatikiza apo, pokhazikitsa malire a chipindacho m'ma wafer osiyanasiyana, mphete yolunjika imathandiza kukonza kubwerezabwereza kwa ntchito. M'malo opangira zinthu zambiri, ngakhale kusinthasintha pang'ono kwa zinthu za m'mphepete kungayambitse kusinthasintha kwa ntchito; chifukwa chake, kukhazikika kwa magwiridwe antchito a mphete yolunjika ndikofunikira kwambiri.
Ⅲ. Mtengo Waukulu wa Zophimba za CVD
Pamene njira zochotsera plasma zikuchulukirachulukira—makamaka chifukwa cha kugwiritsa ntchito njira zopangira mankhwala zochokera ku fluorine ndi chlorine—zofunikira pazinthu zopangira mphete zowunikira nazonso zakhala zovuta kwambiri. Zipangizo zakale monga quartz kapena zoumba zambiri nthawi zambiri zimakhala ndi vuto la kuchuluka kwa etch, chizolowezi chopanga tinthu tating'onoting'ono, komanso kusakhazikika bwino pakagwa nthawi yayitali mu plasma. Zophimba za CVD—makamaka CVD SiC (silicon carbide) ndi CVD carbon coating—zimathetsa bwino zofookazi chifukwa cha kapangidwe kake kapadera komanso mankhwala.
Chinthu chachikulu chomwe chimapangitsa kuti CVD ikhale yolimba kwambiri ndi kuchuluka kwake kwakukulu, komwe kuli pafupi ndi kuchuluka kwa malingaliro, komanso kuchepa kwa porosity, zomwe zimapangitsa kuti isamatsutse kwambiri ku plasma. Kafukufuku wasonyeza kuti m'malo okhala ndi fluorine, kuchuluka kwa CVD SiC komwe kumapangidwa ndi fluorine ndi kochepa kwambiri poyerekeza ndi quartz, zomwe zimapangitsa kuti ikhale chinthu choyenera kwambiri pakupanga zinthu zolimba kwambiri. Kulimba kumeneku kumatanthauza kuti zinthuzo zimakhala ndi moyo wautali komanso nthawi yocheperako yosamalira.
Chofunikanso ndi nkhani yokhudza kuipitsidwa kwa zinthu. Tinthu tomwe timapangidwa ndi zinthu za m'chipindamo timakhalabe chimodzi mwa zifukwa zazikulu zotayira zokolola m'njira zopangira zinthu za semiconductor zapamwamba. Malinga ndi miyezo ya SEMI ndi maphunziro oyenera oletsa kuipitsidwa, ngakhale tinthu tating'onoting'ono ta sub-micron tingayambitse zolakwika zazikulu, makamaka m'malo opitilira patsogolo osakwana 10 nanometers. Zophimba za CVD, zokhala ndi mawonekedwe okhuthala komanso okhazikika pamwamba, zimachepetsa kwambiri chiopsezo cha kufalikira kwa micro-spalling pamwamba ndi kutulutsidwa kwa zinyalala, motero zimathandiza kupanga malo oyera komanso abwino.
Kapangidwe ka CVD SiC Film Crystal ndi Micro
Mbali ina yofunika kwambiri ndi kuwongolera kutulutsa kwa ma elekitironi achiwiri (SEE). Kuyanjana pakati pa plasma ndi pamwamba pa chipinda kumakhudzidwa kwambiri ndi makhalidwe a SEE, omwe amakhudza kuchuluka kwa plasma ndi kukhazikika kwake. Poyerekeza ndi zinthu zakale, malo okhala ndi CVD amakhala ndi makhalidwe a SEE okhazikika komanso odziwikiratu, zomwe zimathandiza kuwongolera bwino momwe plasma imagwirira ntchito komanso kukonza kubwerezabwereza kwa njira.
Kukhazikika kwa kutentha ndi ubwino wina waukulu wa zokutira za CVD. Njira za plasma zolemera kwambiri nthawi zambiri zimapanga mafuta ambiri, makamaka m'madera a m'mphepete mwa wafer. Zipangizo monga CVD SiC zimakhala ndi mphamvu yabwino kwambiri yoyendetsera kutentha komanso mphamvu zowongolera kutentha, zomwe zimachepetsa chiopsezo cha ming'alu, kupindika, kapena kugawanika pansi pa kupsinjika kwa kutentha kwa cyclic. Kukhazikika kwa kapangidwe kameneka ndikofunikira kwambiri kuti zitsimikizire kuti magwiridwe antchito nthawi zonse amachitika nthawi yayitali.
Ⅳ. Zotsatira pa Mayeso Ogwira Ntchito Ofunika Kwambiri
Mphete Yoyang'ana Yophatikizana ya CVD
Mphete yolunjika iyi idzakhala ndi mphamvu yolunjika komanso yoyezera paziyeso zingapo zofunika kwambiri pakujambula kwa semiconductor. Chimodzi mwazofunikira kwambiri ndi kufanana kwa etch. Mwa kukhazikika kwa plasma sheath ndikuwonetsetsa kuti ma ion flux agawidwa mofanana, mphete zolunjika za CVD zimathandiza kuwongolera kwambiri kufanana kwa wafer, nthawi zambiri kukwaniritsa kulondola kwa ±2% kofunikira popanga zida zapamwamba. Mlingo uwu wowongolera ndi wofunikira kwambiri panjira zojambulira za aspect ratio, pomwe ngakhale kusintha pang'ono kungayambitse kusokonekera kwakukulu kwa etch profile.
Kulamulira Kofunikira Kwambiri (CD)
Kusinthasintha kwa ma ion incidence angles m'mphepete mwa wafer kungayambitse kusintha kwa ma CD, ndipo vutoli limakhala lovuta kwambiri pamene kukula kwa zinthu kukupitirira kuchepa. Mwa kusunga mikhalidwe yokhazikika yamagetsi, mphete yolunjika imathandiza kuonetsetsa kuti njira za ma ion zimagwirizana, motero kuchepetsa kusinthasintha kwa ma CD mu wafer yonse. Izi ndizofunikira kwambiri kuti chipangizocho chigwire ntchito bwino komanso kukwaniritsa zofunikira pa kapangidwe kake pama node apamwamba a process.
Kupititsa patsogolo Kubwerezabwereza ndi Kukhazikika kwa Njira
Zophimba za CVD zimapereka malo okhazikika komanso olimba omwe makhalidwe ake amakhalabe ofanana pakapita nthawi, motero amachepetsa kusuntha kwa plasma ndikupangitsa kuti magwiridwe antchito azikhala ofanana pakati pa ma wafer. M'malo opangira zinthu zambiri, izi ndizofunikira kwambiri pakukhazikitsa Statistical Process Control (SPC).
Kuwongolera Kwambiri Tinthu Tinthu
Kuchepa kwa kuwonongeka ndi kukhazikika bwino kwa pamwamba kumachepetsa kupanga tinthu tating'onoting'ono, zomwe zimakhudza mwachindunji kukolola ndi kudalirika kwa zida. Mu kupanga kwapamwamba kwa semiconductor, komwe zolinga zowongolera kuchulukana kwa zolakwika zimakhala zovuta kwambiri, mwayi uwu wokha ndi wokwanira kulungamitsa kugwiritsa ntchito zida zophimbidwa ndi CVD.
Pamene makampani opanga ma semiconductor akufuna kulondola kwa kayendetsedwe ka ntchito komanso magwiridwe antchito azinthu akupitilira kukwera, chitukuko ndi kupezeka kwaMphete zoyang'ana zokhala ndi CVDakuchulukirachulukira pakati pa opanga ochepa apadera, oyendetsedwa ndi ukadaulo. Makampani mongaHeksaboni, Vetek SemiconductorndiSemiceraakhazikitsa malo abwino pamsika chifukwa cha ukadaulo wawo wapamwamba wa CVD wokutira, luso lokonza zinthu zoyera kwambiri, komanso kuphatikiza kwakukulu ndi zofunikira pazida za semiconductor. Makamaka, makampani monga Vetek ndi Semicera amayang'ana kwambiri pakupereka mayankho okonzedwa mwamakonda, kusintha mapangidwe a mphete yolunjika ku mapangidwe enaake a etch chemistry ndi nsanja za zida; pomwe Hexcarbon yamanga mbiri yabwino pamsika kutengera ukadaulo wake mu graphite yoyera kwambiri ndi zigawo zophimbidwa kuti zigwiritsidwe ntchito pa semiconductor. Kuphatikiza uku kwa ukatswiri wa sayansi ya zida ndi luso laukadaulo wa njira kumathandiza makampaniwa kukwaniritsa zofunikira zomwe zikuchulukirachulukira pakupanga semiconductor ya m'badwo wotsatira.
Maumboni:
"Mfundo Zokhudza Kutuluka kwa Magazi ndi Kukonza Zipangizo"
"Journal of Vacuum Science & Technology A"
Nthawi yotumizira: Marichi-20-2026