| 摘要 |
The present invention is a planar antenna member configured to introduce electromagnetic waves generated by an electromagnetic-wave generating source into a processing vessel of a plasma processing apparatus, the planar antenna member comprising: a base member of a circular plate shape, made of a conductive material; and a plurality of through-holes formed in the base member of a circular plate shape, the through-holes being configured to radiate the electromagnetic waves; wherein: the through-holes include a plurality of first through-holes which are arranged on a circumference of a circle whose center corresponds to a center of the planar antenna member, and a plurality of second through-holes which are arranged concentrically with the circle outside the first through-holes; a ratio L1/r is within a range between 0.35 and 0.5, in which L1 is a distance from the center of the planar antenna member to a center of one of the first through-holes, and r is a radius of the planar antenna member; and a ratio L2/r is within a range between 0.7 and 0.85, in which L2 is a distance from the center of the planar antenna member to a center of one of the second through-holes, and r is the radius of the planar antenna member.
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