Patent ID: 11964471
Assignee: SEMES CO., LTD.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B  H | IPC B  H

Claim 0:
1. An apparatus for treating a substrate, comprising:
a stage extending in a first direction, configured to move a substrate in the first direction, and having an air floating system;
a gantry arranged on the stage to extend in a second direction crossing the first direction;
a head module installed on the gantry and movable in the second direction; and
a displacement sensor installed in the head module and configured to measure a separation distance between the substrate and the stage,
wherein at a first position, the head module ejects ink to the substrate and the displacement sensor measures a first separation distance between the substrate and the stage, and
at a second position that is different from the first position, the head module ejects ink to the substrate and the displacement sensor measures a second separation distance between the substrate and the stage.