SILICON CASTING MOLD

PROBLEM TO BE SOLVED: To provide a silicon casting mold excellent in molding releasability, capable of preventing peeling and falling off of the inner surface of a mold and crack generation of the silicon ingot and provided with an easily moldable releasing layer in order to cast the uniform silicon ingot in good yield.SOLUTION: The releasing layer 3 molded on the inner surface of the silicon casting mold 1 is configured to include: a sintered compact made by thermal oxidation of silicon nitride powder produced by a thermal decomposition method for imides in a contacting part with the surface 4a of a molten silicon liquid filled in the mold 1 and the upper part 3A above the same; and a sintered compact made by thermal oxidation of silicon nitride powder produced by a direct nitridation method in the lower part 3B below the contact part with the molten silicon liquid surface 4a.