Patent ID: 7858053

Claim:
A bevel etching apparatus for etching a region at a predetermined distance from the outer edge of a substrate, comprising: a support unit applied ground potential and rotating a substrate supported thereon along the circumferential direction; an electrode having a gap inserted a region at a predetermined distance from the outer edge of the supported substrate and a surface opposing to the inserted substrate covered with a dielectric; and a high-frequency power source connected to the electrode, wherein the electrode having a cross section being a roughly U-shaped type comprises a front surface side electrode located at a front surface side of the inserted substrate and a rear surface side electrode located at a rear surface side of the inserted substrate, which are electrically separated, a cross section each of the surface side electrodes being L-shaped type, the high-frequency power source is connected to the rear surface side electrode and the ground potential is applied to the front surface side electrode, the inserted substrate is grounded via the support unit, and an atmospheric-pressure glow discharge is generated between the rear surface side electrode and the inserted substrate.