NOVELTY - Manufacture of silicon ingot involves performing (Sp1) primary process by arranging a seed crystal of plate-shaped single crystal silicon on the bottom face potion of a casting mold and arranging a solid-state silicon block on the seed crystal, carrying out (Sp2) secondary process by melting the silicon block and covering the upper surface of the seed crystal using a primary silicon melt solution, and performing (Sp3) tertiary process by cooling the upper surface of seed crystal by pouring primary silicon melt solution from the bottom face portion side of casting mold.    USE - Manufacture of silicon ingot used for solar cell element.    ADVANTAGE - The method enables manufacture of high quality silicon ingot with desired crystal orientation and reduced crystal growth, by simple process.    DETAILED DESCRIPTION - Manufacture of silicon ingot involves performing primary process by arranging a seed crystal of plate-shaped single crystal silicon on the bottom face potion of a casting mold and arranging a solid-state silicon block on the seed crystal, carrying out secondary process by melting the silicon block and covering the upper surface of the seed crystal using a primary silicon melt solution, performing tertiary process by cooling the upper surface of the seed crystal by pouring primary silicon melt solution from the bottom face portion side of the casting mold and a secondary silicon melt solution into the casting mold covered by the primary silicon melt solution, and carrying out (Sp4) unidirectional solidification process in upper direction from the bottom face portion side of the casting mold with respect to tertiary silicon melt solution containing primary silicon melt solution and secondary silicon melt solution.    DESCRIPTION OF DRAWING(S) - The drawing shows the flowchart explaining the manufacture of silicon ingot. (Drawing includes non-English language text)    Performing primary process (Sp1)    Carrying out secondary process (Sp2)    Performing tertiary process (Sp3)    Carrying out unidirectional solidification process (Sp4)    Coating mold release material to inner wall face of casting mold (Sp11)