Patent ID: 8455369

Claim:
A trench embedding method comprising: forming an oxidization film on a trench formed on a semiconductor substrate by oxidizing the semiconductor substrate on which the trench is formed; forming an oxidization barrier film on the oxidization film; forming an expandable film on the oxidization barrier film; embedding an embedding material that contracts by being fired on the trench where the oxidization barrier film and the expandable film are formed; and firing the embedding material, wherein the forming of the oxidization barrier film comprises: forming a first seed layer on the oxidization film by supplying an aminosilane-based gas to the semiconductor substrate on which the oxidization film is formed; and forming a silicon nitride film on the first seed layer, wherein the forming of the expandable film comprises: forming a second seed layer on the silicon nitride film by supplying an aminosilane-based gas to the semiconductor substrate on which the silicon nitride film is formed; and forming a silicon film on the second seed layer.