Patent ID: 9653555
Date: 2017-05-16
CPC Classifications: C30B,H01L

Claim:
1. A method of filling a depression of a workpiece which includes a semiconductor substrate and an insulating film formed on the semiconductor substrate, the depression passing through the insulating film and extending up to an inside of the semiconductor substrate, the method comprising: forming a first thin film made of a semiconductor material along a wall surface which defines the depression; performing gas phase doping on the first thin film; by annealing the workpiece within a vessel, forming an epitaxial region conforming to crystals of the semiconductor substrate from the semiconductor material of the first thin film along a surface of the semiconductor substrate which defines the depression, without moving the first thin film with the gas phase doping performed; forming a second thin film made of a semiconductor material along the wall surface which defines the depression; and by annealing the workpiece within the vessel, further forming an epitaxial region from the semiconductor material of the second thin film moved toward a bottom of the depression.