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

Claim 9:
10. 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 arranged in a grid pattern; and
a plurality of gas supply channels provided in the main body and respectively formed with a gas supply opening on the surface of the main body, configured to supply a gas to the substrate, wherein the gas supply channels are formed between the burls and between the vacuum channels;

a first 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.