Patent ID: 7171919
Filing Date: 2007-02-06
Classification: C23C,H01J

Abstract:
1. A diamond film depositing apparatus using microwaves and plasma, comprising: a microwave introducing device including a wave guide, a mode transition coupler connected to the wave guide and a microwave cavity resonator connected to the mode transition coupler and having a processing chamber comprising a quartz bell jar and a workpiece holder with a support plate on which a workpiece is placed, wherein said microwave cavity resonator is defined by a generally hollow body having an outer wall formed in the shape of a taper of circular cross-section having its widest end adjacent said mode transition coupler and its narrowmost end adjacent said support plate, the widest end being the portion of the body with the widest diameter and the narrowmost end being the portion of the body with the narrowmost diameter, wherein said body of said microwave cavity resonator provides a field strength distribution having a single main peak only in the vicinity of said workpiece holder within said microwave cavity resonator and a plurality of secondary peaks located at other regions within said microwave cavity resonator, the vicinity of said workpiece holder being a lower portion of said microwave cavity resonator where the workpiece is located.