Patent ID: 9034718
Filing Date: 2015-05-19
Classification: C23C,H01L

Abstract:
1. A boron-added silicon nitride film forming method performed by a film forming apparatus including a reaction pipe which accommodates a substrate holding unit capable of holding a substrate; a first source gas supply unit which supplies the silicon-containing gas to the reaction pipe and has a first switch valve for controlling supply and stop of the silicon-containing gas to the reaction pipe; a second source gas supply unit which supplies the boron-containing gas to the reaction pipe and has a second switch valve for controlling supply and stop of the boron-containing gas to the reaction pipe; a third source gas supply unit which supplies the nitrogen-containing gas to the reaction pipe and has a third switch valve for controlling supply and stop of the nitrogen-containing gas to the reaction pipe; and a fourth switch valve which is formed between the reaction pipe and an exhaust unit connected to the reaction pipe, and connects or disconnects between the reaction pipe and the exhaust unit, the boron-added silicon nitride film forming method comprising: forming a silicon nitride layer by using the silicon-containing gas and the nitrogen-containing gas, and forming a boron nitride layer by using the boron-containing gas and the nitrogen-containing gas, wherein, after a first predetermined times of the forming of the silicon nitride layer are performed, a second predetermined times of the forming of the boron nitride layer are performed, and wherein the forming of the silicon nitride layer comprises: wherein the forming of the boron nitride layer comprises: