Patent ID: 7427572
Filing Date: 2008-09-23
Classification: C23C,H01L

Abstract:
1. A method for forming a silicon nitride film, comprising: depositing a silicon nitride film on a target substrate by CVD in a process field within a reaction container, while supplying a silane family gas and an ammonia gas to the process field, and setting the process field at a first temperature and a first pressure, for a first time period; then, purging the process field while shutting off a supply of the silane family gas and the ammonia gas to the process field; and then, nitriding a surface of the silicon nitride film in the process field, while supplying the ammonia gas to the process field without supplying the silane family gas, and setting the process field at a second temperature and a second pressure, for a second time period shorter than the first time period.