摘要:
A method for producing a silicon ingot by the horizontal magnetic field Czochralski method includes rotating a crucible containing a silicon melt, applying a horizontal magnetic field to the crucible, contacting the silicon melt with a seed crystal, and withdrawing the seed crystal from the silicon melt while rotating the crucible to form a silicon ingot. The crucible has a wettable surface with a cristobalite layer formed thereon.
摘要:
A silicon single crystal manufacturing method includes: applying a transverse magnetic field to a melt of polysilicon with a carbon concentration of at most 1.0 × 10 15 atoms/cm 3 as a raw material; rotating the crucible at 5.0 rpm or less; allowing inert gas to flow at rate A (m/sec) of formula (1) at a position 20-50% of Y above the melt surface; controlling the rate A within the range of 0.2 to 5, 000/d (m/sec) (d: crystal diameter (mm)); and reducing the total power of side and bottom heaters by 3 to 30% and the side heater power by 5 to 45% until the solidified fraction reaches 30%. A = Q ⋅ 760 1000 ⋅ 60 ⋅ P ⋅ α / π ⋅ X ⋅ Y ⋅ 10 6 Q: Inert gas volumetric flow rate (L/min) P: Pressure (Torr) in furnace X: Radiation shield opening diameter Y: Distance (mm) from raw material melt surface to radiation shield lower end α : Correction coefficient
摘要翻译:硅单晶制造方法包括:以碳浓度为1.0×10 15原子/ cm 3以下的多晶硅熔体作为原料施加横向磁场; 使坩埚以5.0rpm或更小的速度旋转; 允许惰性气体在熔体表面上方的20-50%的位置以式(1)的速率A(m / sec)流动; 控制速度A在0.2〜5000 / d(m / sec)(d:晶体直径(mm))的范围内; 并将侧加热器和底部加热器的总功率降低3至30%,侧加热器功率降低5至45%,直到固化部分达到30%。 A = Q <760 1000 <60
摘要:
Ringförmiger Widerstandsheizer zum Zuführen von Wärme zu einem wachsenden Einkristall, umfassend einen oberen und einen unteren Ring, die angrenzend an einen Ringspalt des unteren Rings mittels einer Schleife elektrisch leitend verbunden sind, so dass die Fließrichtung von elektrischem Strom, der durch die Ringe geleitet wird, in den Ringen entgegengesetzt ist; Verbindungselemente, die den oberen und den unteren Ring auf Abstand zusammenhalten; und Stromzuführungen zum Leiten von elektrischem Strom durch den oberen und den unteren Ring.
摘要:
The invention relates to a method for the crystallogenesis of a material that is electrically conducting at the molten state, by drawing from a molten mass of said material in a crucible (1), that comprises: progressively subjecting the molten material to a decreasing temperature so that a liquid-solid interface is formed; controlling the flatness of the liquid-solid interface of the material; subjecting the molten material, before and during solidification, to an electromagnetic kneading; said method being characterised in that the electromagnetic kneading is obtained by applying an alternating magnetic field. The invention also relates to a device for implementing said method.
摘要:
A quartz crucible which stores a silicon melt is rotated at a predetermined rotation speed, and a silicon single crystal ingot pulled from the melt is rotated at a predetermined rotation speed. A first coil and a second coil are installed with a predetermined spacing in between such that a center of each of the coils corresponds to a rotation center of the crucible. A magnetic field is generated by energizing electric currents in the first and second coils in the same direction. The first coil is installed outside the chamber and the second coil is installed inside the chamber. A center position of the predetermined spacing between the first coil and the second coil is controlled at the same or a lower level as the surface of the silicon melt such that a distance of the center position from the surface of the silicon melt is 0 mm or more and 10000 mm or less.
摘要:
To produce a hydrogen storage alloy by melting a hydrogen storage alloy having a body-centered cubic crystal structure without using a refractory crucible and solidifying a molten alloy by a unidirectional solidification process. The unidirectional solidification is carried out by a cold crucible induction melting method at a moving speed of a solid-liquid interface in the range of 10 to 200 mm/hr by using a water-cooled metal crucible in a vacuum or an inert gas atmosphere.