Patent ID: 6675737
Filing Date: 2004-01-13
Classification: C23C,H01J

Abstract:
A plasma processing apparatus comprising:a process chamber including an opened ceiling and an internal space which can be evacuated; an insulating plate airtightly attached to the ceiling of said process chamber; a mount base placed in said process chamber for mounting thereon a workpiece to be processed; a planar antenna member placed above said insulating plate and including a microwave radiation hole for transmitting therethrough microwave used for generating plasma, said microwave transmitted through said insulating plate into said process chamber; a wave-delay member placed above said planar antenna member for decreasing the wavelength of microwave; and gas supply means for supplying a predetermined gas into said process chamber, wherein said insulating plate has its peripheral end formed into an uneven shape with depressions and protrusions for causing, reflected waves of the microwave propagated through said insulating plate from the center and in the radial direction of said insulating plate, to cancel out each other.