Patent ID: 8344482

Claim:
A bevel etching apparatus for etching a region of a substrate at a predetermined distance from the outer edge of the substrate, comprising: a support unit configured to apply ground potential and rotate the substrate supported thereon along the circumferential direction; an electrode having a gap configured for inserting the region of the substrate at the predetermined distance from the outer edge of the supported substrate, wherein the electrode comprises a surface covered with dielectric, and wherein the surface is opposite the substrate region inserted into the gap; and a high-frequency power source connected to the electrode, wherein the electrode has a U-shaped type cross section comprising 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, wherein the front surface side electrode and the rear surface side electrode are electrically connected, the high-frequency power source is connected to the front surface side electrode and the rear surface side electrode, and the inserted substrate is grounded via the support unit.