Patent ID: 11869751
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A substrate processing method using a substrate processing apparatus, the substrate processing method comprising:
preparing a substrate;
forming a plasma; and
applying, by the substrate processing apparatus, a plasma-etching process to the substrate,
wherein the substrate processing apparatus includes:
a wafer supporter configured to support the substrate,
a focus ring configured to surround an outer perimeter of the substrate,
an upper electrode disposed apart from the wafer supporter in a first direction, wherein the first direction is a vertical direction perpendicular to a plane including a top surface of the substrate, and
a shroud surrounding the upper electrode and the wafer supporter,
wherein the upper electrode includes:
a first electrode configured to face the substrate, and
a second electrode configured to face the focus ring, the second electrode surrounding the first electrode and extending beyond the focus ring in a radial direction with respect to a center axis of the upper electrode, wherein a bottom surface of the second electrode includes a recessed portion recessed in a direction from the bottom surface of the second electrode toward a top surface of the second electrode.