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Crucible coat structure, production method and crucible
The invention discloses a crucible coat structure for polysilicon cast ingots. The coat structure comprises a first coat coated on a crucible substrate and a second coat coated on the first coat; and the crucible substrate is coated with the first coat and the second coat capable of inhibiting diffusion of impurities in a crucible body to molten silicon in order to effectively improve the yield of the cast ingots. The first coat is a mixture containing quartz sand and at least one of silicon crystals and silicon nitride, and the material of the second coat is silicon nitride. The material of the first coat is particles capable of generating nucleation points, and the particles can effectively guide nucleation of silicon crystals in order to improve the production quality of the polysilicon cast ingots and improve the yield of the polysilicon cast ingots. The invention also discloses a crucible with the crucible coat structure, and a production method of the crucible coat structure.
Crucible coat structure, production method and crucible
The invention discloses a crucible coat structure for polysilicon cast ingots. The coat structure comprises a first coat coated on a crucible substrate and a second coat coated on the first coat; and the crucible substrate is coated with the first coat and the second coat capable of inhibiting diffusion of impurities in a crucible body to molten silicon in order to effectively improve the yield of the cast ingots. The first coat is a mixture containing quartz sand and at least one of silicon crystals and silicon nitride, and the material of the second coat is silicon nitride. The material of the first coat is particles capable of generating nucleation points, and the particles can effectively guide nucleation of silicon crystals in order to improve the production quality of the polysilicon cast ingots and improve the yield of the polysilicon cast ingots. The invention also discloses a crucible with the crucible coat structure, and a production method of the crucible coat structure.
Crucible coat structure, production method and crucible
HE ZHAOXUAN (author) / PEI LIANG (author) / DENG LIANGLIANG (author) / SUN QIANSONG (author) / PAN SHOUMING (author)
2015-06-17
Patent
Electronic Resource
English
IPC:
C30B
SINGLE-CRYSTAL GROWTH
,
Züchten von Einkristallen
/
B32B
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
,
Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse
/
C04B
Kalk
,
LIME
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