Patent ID: 8091384

Claim:
A method of manufacturing a silica glass crucible for pulling silicon single crystals comprising: feeding a quartz starting material powder into a rotating mold and forming a crucible-shaped molded product; imparting reduced pressure from the inner surface to the outer surface of the crucible-shaped molded product and arc-fusing the crucible-shaped molded product while rotating the product to form a silica glass crucible with a transparent layer on the inner surface side and a bubble layer on the outer surface side; fusing a second time by arc fusion the inner surface of the wall portion of the silica glass crucible to cause bubbles present in the transparent layer of the inner surface of the wall portion to be displaced toward the bottom portion of the inner surface of the wall portion; and fusing a second time by arc fusion the inner surface of the bottom portion of the silica glass crucible to cause bubbles present in the transparent layer of the inner surface of the bottom portion to be displaced toward the periphery of the inner surface of the bottom portion; and wherein either said fusing the second time by arc fusion the inner surface of the wall portion or the said fusing the second time by arc fusion the inner surface of the bottom portion is performed first to obtain a silica glass crucible in which bubbles are accumulated in the corner portions of the transparent layer formed on the inner surface of the wall portion and the inner surface of the bottom portion, and wherein the bubbles accumulated in the corner portions of the transparent layer are removed.