Patent ID: 8034727

Claim:
A semiconductor device manufacturing method including a film formation method of forming a film of a metal oxide containing a metal element M and Si as components on a substrate to be treated containing at least Si as constituent elements by using a first raw material gas containing Si, a second raw material gas containing the metal element M, and an oxidation gas, the method sequentially performing a first step of supplying said oxidation gas, a second step of supplying said first raw material gas, and a third step of supplying said second raw material gas or gas mixture of said second raw material gas and said first raw material gas, onto said substrate to be treated, wherein a fourth step of supplying said oxidation gas onto said substrate to be treated is performed following said third step and, further, one or a plurality of cycles are performed, each cycle consisting of four steps: a fifth step of supplying said first raw material gas, a sixth step of supplying said oxidation gas, a seventh step of supplying said second raw material gas or gas mixture of said first raw material gas and said second raw material gas, and an eighth step of supplying said oxidation gas.