Patent ID: 8721787
Filing Date: 2014-05-13
Classification: C30B

Abstract:
1. A method for manufacturing a silicon single crystal comprising: producing a silicon melt in a chamber by melting a silicon raw material loaded into a silica glass crucible under a reduced pressure and a temperature; removing gas bubbles from within the silicon melt by changing at least the pressure or temperature within the chamber; and pulling up the silicon single crystal from the silicon melt after the gas bubbles are removed, wherein: a pressure change ratio within the chamber when removing the gas bubbles within the silicon melt is 5 times or more and 1000 times or less than a pressure change ratio when reducing the pressure inside the chamber in order to melt the silicon raw material, and a temperature change ratio within the chamber when removing the gas bubbles within the silicon melt is 5 times or more and 100 times or less than a temperature change ratio when increasing the temperature inside the chamber in order to melt the silicon raw material.