Kuyambiracrucibleamagwiritsidwa ntchito ngati chidebe ndipo mkati mwake muli convection, kukula kwa kristalo komwe kumapangidwa kumawonjezeka, kutentha kwa kutentha ndi kusinthasintha kwa kutentha kumakhala kovuta kwambiri kuwongolera. Powonjezera mphamvu ya maginito kuti ipangitse kusungunuka kwa conductive pa mphamvu ya Lorentz, convection imatha kuchepetsedwa kapena kuthetsedwa kuti ipange silicon imodzi yapamwamba kwambiri.
Malinga ndi mtundu wa maginito, imatha kugawidwa m'magawo opingasa a maginito, maginito osunthika ndi maginito a CUSP:
Maginito osunthika sangathe kuthetseratu kusuntha kwakukulu chifukwa cha zifukwa zamapangidwe ndipo sagwiritsidwa ntchito kawirikawiri.
Mayendedwe a gawo la maginito opingasa maginito ndi perpendicular to the main heat convection and partic subction convection of the crucible wall, yomwe ingalepheretse kuyenda bwino, kusunga kusalala kwa mawonekedwe a kukula, ndi kuchepetsa mikwingwirima ya kukula.
Mphamvu ya maginito ya CUSP imakhala ndi kuyenda kofananira komanso kutentha kwa sungunuka chifukwa cha kufanana kwake, kotero kafukufuku wa maginito oima ndi CUSP akhala akuyenda limodzi.
Ku China, Xi'an University of Technology yazindikira kuyesa ndi kukoka makristalo a silicon imodzi yamakristalo pogwiritsa ntchito maginito kale. Zogulitsa zake zazikulu ndi 6-8in mitundu yotchuka, yomwe imayang'ana msika wa silicon wafer wama cell a solar photovoltaic. M'mayiko akunja, monga KAYEX ku United States ndi CGS ku Germany, mankhwala awo akuluakulu ndi 8-16in, omwe ali oyenera ndodo za crystal crystal pamlingo wa ultra-large-scale-integrated circuits and semiconductors. Iwo ali ndi ulamuliro pa gawo la maginito a kukula kwa makhiristo amodzi apamwamba kwambiri m'mimba mwake ndipo ndi omwe amaimira kwambiri.
Kugawidwa kwa maginito m'dera la crucible la single crystal growth system ndilo gawo lofunika kwambiri la maginito, kuphatikizapo mphamvu ndi kufanana kwa mphamvu ya maginito pamphepete mwa crucible, pakati pa crucible, ndi yoyenera. mtunda pansi pa madzi pamwamba. Onse yopingasa ndi yunifolomu yopingasa maginito, mizere maginito mphamvu ndi perpendicular kwa crystal kukula olamulira. Malinga ndi mphamvu ya maginito ndi lamulo la Ampere, koyiloyo ili pafupi kwambiri ndi m'mphepete mwa crucible ndipo mphamvu yamunda ndiyo yaikulu kwambiri. Pamene mtunda ukuwonjezeka, kukana kwa maginito kwa mpweya kumawonjezeka, mphamvu yamunda imachepa pang'onopang'ono, ndipo ndi yaying'ono kwambiri pakati.
Udindo wa superconducting magnetic field
Kuletsa kutentha kwa kutentha: Popanda mphamvu ya maginito yakunja, silicon yosungunuka imatulutsa kutentha kwachilengedwe panthawi yotentha, zomwe zingayambitse kugawidwa kosagwirizana kwa zonyansa ndi kupanga zolakwika za kristalo. Mphamvu ya maginito yakunja imatha kupondereza convection iyi, kupangitsa kugawa kwa kutentha mkati mwa yunifolomu yosungunuka ndikuchepetsa kugawa kosagwirizana kwa zonyansa.
Kuwongolera kukula kwa kristalo: Mphamvu ya maginito imatha kukhudza momwe kristalo imakulira komanso momwe ikukulira. Mwa kuyang'anira bwino mphamvu ndi kugawa kwa maginito, njira ya kukula kwa kristalo ikhoza kukonzedwa bwino ndipo kukhulupirika ndi kufanana kwa kristalo kumatha kusintha. Pakukula kwa silicon imodzi ya crystal, mpweya umalowa mu silicon umasungunuka makamaka kudzera mumayendedwe osungunuka ndi crucible. Mphamvu ya maginito imachepetsa mwayi wa okosijeni wolumikizana ndi silicon kusungunuka mwa kuchepetsa kusuntha kwa sungunuka, potero kumachepetsa kusungunuka kwa okosijeni. Nthawi zina, kunja kwa maginito kungasinthe zinthu za thermodynamic za kusungunuka, monga kusintha kugwedezeka kwa pamwamba pa kusungunuka, zomwe zingathandize kuphulika kwa mpweya, potero kuchepetsa mpweya wa okosijeni musungunuka.
Chepetsani kusungunuka kwa okosijeni ndi zonyansa zina: Oxygen ndi chimodzi mwa zonyansa zomwe zimafala pakukula kwa makristasi a silicon, zomwe zingapangitse kuti khalidwe la kristalo liwonongeke. Mphamvu ya maginito imatha kuchepetsa kuchuluka kwa okosijeni mu sungunuka, potero kuchepetsa kusungunuka kwa okosijeni mu kristalo ndikuwongolera chiyero cha kristalo.
Sinthani mawonekedwe amkati a kristalo: Mphamvu yamaginito imatha kukhudza mawonekedwe omwe ali mkati mwa kristalo, monga kusokonezeka ndi malire ambewu. Mwa kuchepetsa chiwerengero cha zolakwikazi ndikukhudza kugawa kwawo, khalidwe lonse la kristalo likhoza kusintha.
Kupititsa patsogolo mphamvu zamagetsi za makristasi: Popeza kuti maginito amakhudza kwambiri microstructure panthawi ya kukula kwa kristalo, amatha kusintha mphamvu zamagetsi zamakristasi, monga resistivity ndi moyo wonyamulira, zomwe ndizofunikira kwambiri popanga zipangizo zamakono zogwiritsira ntchito semiconductor.
Landirani makasitomala aliwonse ochokera padziko lonse lapansi kuti atichezere kuti tidzakambiranenso!
https://www.semi-cera.com/
https://www.semi-cera.com/tac-coating-monocrystal-growth-parts/
https://www.semi-cera.com/cvd-coating/
Nthawi yotumiza: Jul-24-2024