NOVELTY - The upper surface of a silicon melt solution (2) is locally cooled (CC) by bringing (AA) a coolant close to the silicon melt solution surface from the upper portion of a crucible (1). A dendrite crystal (3) is produced in the silicon melt solution surface vicinity, and cooled by maintaining an appropriate temperature distribution. A silicon bulk crystal is then grown from the upper direction to the lower portion by making the lower surface of the dendrite crystal into a new growth surface, to obtain a silicon bulk polycrystal ingot (4).    USE - Manufacture of silicon bulk polycrystal ingot for solar cells.    ADVANTAGE - The method enables manufacture of high-quality and high-homogeneity silicon bulk polycrystal ingots having no crystal defects and free from diffused impurities, with high yield. Since growth is started locally, the contact time of ingot crystal and crucible is shortened. Hence, the ingot crystal has reduced stress for thermal strain. The character of crystal grain size, crystal grain orientation, and crystal grain boundary can be controlled by controlling the density of dendrite crystal.    DETAILED DESCRIPTION - The upper surface of a silicon melt solution is locally cooled by bringing a coolant close to the silicon melt solution surface from the upper portion of a crucible, or by inserting (AA) a coolant into the silicon melt solution in the crucible. A dendrite crystal is produced in the silicon melt solution surface vicinity, and cooled by maintaining an appropriate temperature distribution. A silicon bulk crystal is then grown from the upper direction to the lower portion by making the lower surface of the dendrite crystal into a new growth surface, to obtain a silicon bulk polycrystal ingot.    DESCRIPTION OF DRAWING(S) - The drawing shows a side view of the manufacturing method of silicon bulk polycrystalline ingot. (Drawing includes non-English language text)    Crucible (1)    Silicon melt solution (2)    Dendrite crystal (3)    Silicon bulk polycrystal ingot (4)    Bringing coolant close to or inserting coolant into silicon melt solution (AA)    Cooling (CC)