Patent ID: 9659754
Date: 2017-05-23
CPC Classifications: H01J

Claim:
1. A microwave plasma processing apparatus comprising: a processing chamber including a susceptor configured to dispose a substrate to be processed; an oscillator configured to output high-frequency power; a power supply unit including a transmission plate and configured to supply the high-frequency power to a specific plasma generating location in the processing chamber, the transmission plate including a concave portion of which a center portion is formed at an outer peripheral side of a bottom surface of the transmission plate of the power supply unit; a magnetic field forming unit provided outside the processing chamber near an outer peripheral portion or a lateral portion of the transmission plate and configured to form a magnetic field in a perpendicular direction with respect to the susceptor at least at the specific plasma generating location including an area near the concave portion of the transmission plate of the power supply unit; and a control unit programmed to control a pressure in the processing chamber to be 50 mTorr (6.66 Pa) or less and an intensity of the magnetic field formed in the perpendicular direction with respect to the susceptor by the magnetic field forming unit to be 1 G to 50 G (10 wherein the power supply unit further includes a radial line slot antenna unit disposed above the transmission plate and a slow-wave member disposed on a top of the radial line slot antenna unit, wherein the concave portion is located at a position that is 50% or more spaced from a center of the processing chamber.