Patent ID: 8518180
Filing Date: 2013-08-27
Classification: C30B,Y10T

Abstract:
1. A silicon single crystal pull-up apparatus that pulls a doped silicon single crystal from a melt by Czochralski method, the apparatus comprising: a pulling furnace; a sample chamber that is externally attached to the pulling furnace and houses a sublimable dopant; a shielding means that thermally shields an inside of the sample chamber from an inside of the pulling furnace; a sample tube that can move up and down between the inside of the sample chamber and the inside of the pulling furnace; an elevation/descent means provided with a guide rail on which the sample tube can slide and a wire mechanism that moves the sample tube up and down along the guide rail; and a supply pipe inside the pulling furnace, the supply pipe configured to supply the dopant discharged from the sample tube to the melt, wherein: