Patent ID: 6632750
Filing Date: 2003-10-14
Classification: C23C,H01L

Abstract:
A manufacturing method of a semiconductor integrated circuit device comprising feeding a source gas containing a monosilane gas and an ammonia gas to the vicinity of a main surface of a semiconductor wafer heated to a temperature not less than a thermal decomposition temperature of said monosilane gas and said ammonia gas in a cold-wall thermal CVD reactor, and decomposing said monosilane gas and said ammonia gas in the vicinity of the main surface of said semiconductor wafer, thereby depositing a silicon nitride film over the main surface of said semiconductor wafer placed in a gas atmosphere containing said monosilane gas and said ammonia gas,wherein a flow rate ratio of said ammonia gas to said monosilane gas is within a range of 150 to 750 and a pressure of said gas atmosphere is within a range of 37 kPa to 50 kPa.