Patent ID: 6569236
Filing Date: 2003-05-27
Classification: C30B,Y10T

Abstract:
A Czochralski method (hereinafter â€œCZ methodâ€ ) single-crystal ingot producing device for pulling, inside a furnace, single-crystal ingots from a raw material melt in a crucible, comprising:a thermal shielding element that encloses a single-crystal ingot being pulled (hereinafter â€œbeing-pulled single-crystal ingotâ€ ) and blocks radiant heat from liquid surface of the melt; and a cooler, disposed on inside of the thermal shielding element, for cooling a prescribed portion of the being-pulled single-crystal ingot, the thermal shielding element and the cooler being provided inside the furnace, wherein the cooler comprises a cooling pipeline having an inner diameter of 17 mm or smaller through which cooling water flows, and is disposed in a portion of inside of the thermal shielding element.