Patent ID: 6433298
Filing Date: 2002-08-13
Classification: H01J,H01L

Abstract:
A plasma processing apparatus comprising:a vacuum vessel; a stage disposed in the vacuum vessel to support a substrate thereon; a waveguide connected to the vacuum vessel from outside the vacuum vessel, the waveguide having a cylindrical outer guide member and a cylindrical inner guide member extended in the outer guide member, so as to propagate a high-frequency wave through a space between the outer guide member and the inner guide member into the vacuum vessel and so as to supply a reactive gas through the inner guide member into the vacuum vessel from a position opposite the stage; a high-frequency wave transmitting plate of a dielectric material disposed opposite to the stage and hermetically separating the space between the outer guide member and the inner guide member from a space defined by the vacuum vessel; and a shower head of a conductive material, disposed to cover an end opening of the inner guide member facing the stage, and provided with a plurality of gas spraying holes opening toward the stage, wherein the reactive gas supplied through the shower head into the vacuum vessel is ionized by the high-frequency wave propagated through the transmitting plate to produce a plasma, and the substrate is processed.