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

Claim 8:
9. 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 an upper electrode, and the upper electrode includes a bottom surface configured to face the substrate processed by the substrate processing apparatus,
the bottom surface includes a first protrusion portion having a ring shape,
the first protrusion portion includes a first apex corresponding to a local maximum thickness of the upper electrode in a vertical direction, the bottom surface facing the substrate,
a first distance, which is a distance between the first apex and a center axis of the upper electrode, is beginning at and including about 150 mm and extending to and including about 180 mm,
the bottom surface further includes a point of minimum thickness corresponding to a radial local minimum point, and
the point of minimum thickness occurs between the center axis and the first protrusion portion.