Patent ID: 11923231
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 18:
19. A substrate table system, comprising:
a substrate table, comprising:
a main body having a surface and a plurality of burls extending from the surface, wherein the burls are configured to support a substrate on the main body;
a plurality of vacuum channels provided in the burls, configured to apply a vacuum to the substrate, wherein the vacuum channels are distributed throughout the main body; and
a plurality of gas supply channels provided in the main body and respectively formed with a gas supply opening on the surface, configured to supply a gas to the substrate, wherein the gas supply channels are distributed throughout the main body and formed between the burls, and wherein the vacuum channels and the gas supply channels are alternately arranged;

a pressure control module configured to independently control a vacuum pressure in each vacuum channel; and
a second pressure control module configured to independently control a gas supply pressure in each gas supply channel.