Patent ID: 9257278
Filing Date: 2016-02-09
CPC Classification: C23C,H01L

Claim Text:
1. A method of forming a TiN film to be used as a metallic hard mask in etching of an etching target film formed on a substrate to be processed, the method comprising: alternately repeating a step of forming a TiN unit film and a step of performing a plasma nitriding process on the TiN unit film to form a TiN film having a reduced film stress, wherein the step of forming the TiN unit film is performed by loading the substrate to be processed into a processing chamber, supplying TiCl wherein the step of performing the plasma nitriding process is performed by supplying a nitriding gas into the processing chamber and generating a plasma from the nitriding gas, wherein a film thickness of the TiN film is 10 to 40 nm, and the number of repeating the step of forming the TiN unit film and the step of performing the plasma nitriding process is in a range from 3 to 10, and wherein a film stress of the TiN film subjected to the second cycle of the step of forming the TiN unit film and the step of performing the plasma nitriding process is controlled to about zero.