Patent ID: 11862440
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. An electrostatic chuck comprising:
a side area disposed outside a step formed at an outer perimeter portion; and
a processing area disposed inside the step while having a greater height than the side area, wherein:
an upper surface of the processing area has a tilt of 0.01 or less, wherein the tilt is a ratio between a change in height relative to a change in width of along the upper surface of the processing and
electric field vectors in different directions are generated in the processing area,
wherein the upper surface of the processing area comprises a first peak disposed at a central portion of the upper surface, a second peak disposed outside the first peak, and a valley disposed between the first peak and the second peak.