Patent ID: 8114790

Claim:
A plasma CVD chemical vapor deposition method for forming a silicon nitride film, the method comprising: preparing a plasma processing apparatus which comprises a process chamber configured to be vacuum-exhausted, a worktable equipped with an electrode and configured to place a target substrate thereon inside the process chamber, a microwave generation source configured to generate microwaves, a planar antenna including a plurality of slots and configured to supply the microwaves generated by the microwave generation source through the slots into the process chamber, a gas supply mechanism configured to supply a film formation source gas into the process chamber, and an RF radio frequency power supply configured to apply an RF power to the electrode of the worktable; placing the target substrate on the worktable; supplying N 2 gas and Si 2 H 6 , gas into the process chamber, turning the N 2 gas and the Si 2 H 6 gas into plasma by the microwaves, and depositing the silicon nitride film on a surface of the target substrate by use of the plasma, under a process pressure of 0.1 Pa or more and 53 Pa or less; and causing the silicon nitride film to have a predetermined compressive stress of 1,000 MPa or more by applying the RF power having a frequency of 400 kHz to 27 MHz to the electrode of the worktable at a power density of 0.0032 to 0.637 W/cm 2 to apply an RF bias to the target substrate, while depositing the silicon nitride film.