Method for forming a thin film for a semiconductor device

Abstract

A method for forming a thin film, comprising the steps of: generating a plasma in a plasma generation chamber by action of an electric field generated by a microwave and a magnetic field generated by an exciting coil arranged around; and introducing the generated plasma into a reaction chamber, resulting in forming a thin film on a sample placed on a sample stage, wherein it is a chracteristic to form a metal nitride film on said sample, by introducing Ar, H.sub.2, and N.sub.2 gas into said plasma generation chamber, while introducing a metallic gas into said reaction chamber. By the method according to the present invention, it is possible to form a thin film having good Step Coverage on the contact hole, in addition, on the side wall of the contact hole a thinner film can be formed than that on the bottom. As a result, in the next step, filling in with interconnection materials can be surely performed, resulting in improving reliability of LSI devices.

Dependencies are inferred from the claim text.